JP3701430B2 - Heat-resistant container molding equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat-resistant container molding apparatus, and more particularly to a heat-resistant container molding apparatus obtained by molding a synthetic resin such as polyethylene terephthalate (hereinafter referred to as PET).
[0002]
[Background]
Synthetic resin generally called biaxial stretch blow container Made The thin-walled packaging container is formed by placing a preform having a suitable stretching temperature obtained by injection or extrusion molding in a mold and stretching it in the longitudinal direction corresponding to the longitudinal direction of the container, and by the pressure of the gas blown into the interior. Obtained by inflating laterally.
[0003]
By the way, depending on the selection of the material used for the container described above, there is a heat resistance problem that the container is deformed when the inside is filled with a high-temperature content such as a heat-sterilized fruit juice drink.
[0004]
For example, a PET container has a problem in heat resistance.
[0005]
Therefore, various molding apparatuses that give heat resistance to PET containers have been proposed.
[0006]
For example, the applicant of the present application has previously proposed an apparatus for forming a heat-resistant container as disclosed in JP-A-8-187768.
[0007]
This heat-resistant container molding apparatus forms a primary blow-molded product larger than the final molded product, and then heat-treats it at a high temperature of 150 to 220 ° C. with a heat treatment mold having a cavity surface having substantially the same shape as that of the primary blow-molded product. Then, the intermediate molded product taken out from the heat treatment mold and softened is blow-molded in a final blow mold having a cavity surface of the final formed product to form a heat resistant container.
[0008]
According to this heat-resistant container forming apparatus, it is possible to form a container excellent in heat resistance, which is the purpose, and in a shorter time. so It has many excellent features such as the ability to perform a desired heat treatment and the shape and size of the contracted intermediate molded product after heat treatment being stable.
[0009]
[Problems to be solved by the invention]
However, in the above-mentioned heat-resistant container molding apparatus, from the viewpoint of productivity, the use of the heat treatment mold greatly improved the productivity compared to the conventional heat treatment with hot air, but the ordinary carbonated beverage Compared to a molding cycle such as a container, more time is required for the heat treatment, and further improvement in productivity is desired.
[0010]
Further, due to the exhaust at the end of the heat treatment by the heat treatment mold and the temperature drop during the conveyance from the heat treatment to the final blow molding, the formability at the time of the final blow molding is likely to be deteriorated.
[0011]
In addition, primary blow form When heat treatment is performed at a high temperature of 150 to 220 ° C. using a heat treatment mold having an outer shape of the product, the bottom mold and the neck support member (neck guide, etc.) are usually kept at a low temperature (30 to 100 ° C.). It is easy to move, and a state in which the actual temperature of the heat treatment mold in the vicinity of it is likely to occur.
[0012]
Therefore, the heat resistance of the part from the installation part to the heel part and the part from the lower neck part to the shoulder part is likely to be lower than the other parts.
[0013]
Further, the above two portions are thicker than the normal barrel, have a low degree of orientation, and are less likely to transmit heat, so that the heat resistance tends to be lower than that of the barrel.
[0014]
An object of the present invention is to provide a molding apparatus for a heat-resistant container that can further improve heat resistance, improve productivity, and improve shapeability in a state where the shape and dimensions of an intermediate molded product are stabilized. There is.
[0015]
Another object of the present invention is to provide a heat-resistant container molding apparatus capable of improving the heat resistance of the shoulder portion and the heel portion.
[0016]
Still another object of the present invention is to provide a heat-resistant container molding apparatus capable of efficiently performing from preform reception to preform heating and blow molding without requiring a large space.
[0017]
[Means for Solving the Problems]
To achieve the above purpose,
The invention described in claim 1
Transferred from the supply unit for supplying the preform, a heating station for heating the preform supplied from the supply unit, a transfer unit for transferring the preform heated in the heating station, and the transfer unit A blow molding station for blow molding the preform to form a container is disposed on the machine base,
The heating station has a plurality of linear first transport paths arranged in parallel,
The first transport path has one end coupled to the supply unit and the other end coupled to the transfer unit,
The supply section and the transfer section are the first transport path Are transported in parallel along Each has a mechanism to deliver the preform at the same time,
The blow molding station has a second conveyance path coupled to a transfer unit that intermittently conveys the preform delivered at the same time,
Furthermore, the preform is blow-molded by a primary blow molding die along the second conveying path. blow A primary blow molding part for molding a molded product, and the primary blow A primary heat treatment part that heats the molded product by contacting the inner surface of the primary heat treatment mold while pressurizing the molded product from the inside in the primary heat treatment mold, and a secondary heat treatment part that heats the intermediate molded product that has undergone the primary heat treatment outside the mold, A final blow molding section for blow molding into the shape of the final molded product is disposed in a final blow molding die in which the intermediate molded product that has undergone the secondary heat treatment is heated.
[0018]
According to the present invention, the first conveyance path is linear, and a plurality of the first conveyance paths are provided in parallel. Therefore, the heating station can be arranged with a minimum area, and many preforms can be conveyed at the same time. Heating efficiency can be improved by minimizing the space for carrying the preform.
[0019]
Further, since a plurality of preforms that are simultaneously blow-molded as in the prior art are not simultaneously heated in one heating box, it is easy to control the temperature of each preform. In particular, in the blow molding station, unevenness in quality at the time of blow molding can be prevented by simultaneously carrying a plurality of preforms heated at the same time through the second conveyance path and simultaneously performing blow molding.
[0020]
Further, in the blow molding station, the primary heat treatment portion is subjected to heat treatment to promote crystallization and remove the distortion from the primary heat treatment section. blow The molded product becomes an intermediate molded product in a softened and contracted state, and heat treatment is performed outside the mold in the secondary heat treatment part, further promoting crystallization and improving heat resistance, and at the time of exhausting and conveying at the end of heat treatment It is possible to prevent deterioration of the formability at the time of final blow molding due to a decrease in temperature.
[0021]
In addition, even if the heat treatment time in the primary heat treatment mold in the primary heat treatment is shortened, the heat treatment can be performed outside the mold in the secondary heat treatment part, so that the molding cycle can be shortened and the productivity can be remarkably improved. .
[0022]
The invention of claim 2 is the invention according to claim 1,
The supply unit includes an alignment mechanism that aligns the same number of preforms as the first conveyance path at a pitch of the first conveyance path, and reverses the preform from an upright state to the first conveyance path in an inverted state. A reversing delivery mechanism that delivers,
The alignment mechanism includes a holding member that holds the preforms in an upright state, and the holding member is moved to the first transfer path at a continuous transfer position of the preform. Are transported in parallel along A transfer mechanism for receiving the preform and transferring and positioning the preform to a predetermined delivery position;
The reverse delivery mechanism includes a plurality of first gripping members that grip the neck portions of the preform aligned with the pitch of the first transport path by the alignment mechanism, and the first gripping member that opens and closes the first gripping member. A first opening / closing mechanism for gripping and releasing; a first lifting mechanism for lifting and lowering the first gripping member to take out and delivering the preform; and a reversing mechanism for inverting the first gripping member. It is characterized by that.
[0023]
According to the present invention, in addition to the state of claim 1, the supply unit aligns and positions a plurality of preforms at the pitch of the first conveying path by the alignment mechanism, and the aligned preforms are in the upright state by the reverse delivery mechanism. Therefore, the continuously supplied upright preform can be easily and reliably delivered in an inverted state at a predetermined pitch.
[0024]
The invention of claim 3 is the invention according to claim 1 or 2,
The transfer unit performs gripping and releasing of the preform by opening and closing the second gripping member and holding a plurality of second gripping members that grip the neck portion of the preform heated by the first conveyance path. A second opening / closing mechanism that lifts and lowers the second gripping member to take out and deliver the preform, and the second gripping member is heated with the top and bottom of the second gripping member left and right. And a transfer mechanism for moving the preform in an inverted state to the blow molding station in an inverted state, having a moving mechanism for moving the station side to the blow molding station side.
[0025]
According to the invention, the claims 1 or 2 In addition to the above state, the transfer unit reliably blow-molds the preform heated at the same time in an inverted state by the transfer mechanism having the second gripping member, the second opening / closing mechanism, the second lifting mechanism and the moving mechanism. Can be delivered to the station.
[0026]
The invention of claim 4 is a receiving unit for receiving a preform;
The preform received at the receiving part is blow-molded by a primary blow molding die to be primary blow A primary blow molding part for molding a molded product;
Primary blow molded by the primary blow molding section blow A primary heat treatment part that heats the molded product by contacting the inner surface of the primary heat treatment mold while pressurizing the molded product from the inside in the primary heat treatment mold, and a secondary heat treatment part that heat-treats the intermediate molded product that has undergone the primary heat treatment outside the mold,
A final blow molding section for blow molding into the shape of the final molded product in a final blow molding mold in which the intermediate molded product subjected to the secondary heat treatment is heated;
A substantially rectangular conveyance path having a short side and a long side, which conveys each molded product by the number of simultaneous moldings to each part,
The primary blow molding part, the primary heat treatment part, the secondary heat treatment part and the final blow molding part are arranged on one side of the long side of the conveyance path.
[0027]
According to the present invention, by arranging the primary blow molding part, the primary heat treatment part, the secondary heat treatment part and the final blow molding part on one side of the long side of the conveyance path, the length of the short side is shortened. Prevents spread in the direction and saves space by reducing the installation area. Also, a mold closing mechanism such as a primary blow mold, primary heat treatment mold and final blow mold is installed between the long sides to shorten the space. Edge Can be used effectively.
[0028]
Further, in the primary blow molded product heat-treated in the primary heat treatment mold in the primary heat treatment section, crystallization is promoted, and residual strain is removed by shrinkage that occurs when taken out from the mold.
[0029]
Furthermore, the softened and contracted intermediate molded product is heat-treated outside the mold in the secondary heat treatment part to further promote crystallization and improve heat resistance, and at the end of heat treatment, the temperature during exhaust and transport It is possible to prevent the deterioration of the formability during the final blow molding due to the decrease.
[0030]
In addition, even if the heat treatment time in the primary heat treatment mold in the primary heat treatment section is shortened, the heat treatment can be performed outside the mold in the secondary heat treatment section, thereby shortening the molding cycle and significantly improving the productivity. Can do.
[0031]
Invention of Claim 5 in any one of Claims 1-4,
The secondary heat treatment section is a secondary heat treatment box in which a plurality of infrared heaters are arranged outside the intermediate molded product, and an opening for conveyance is formed before and after the intermediate molded product in the conveyance direction. The Have
The opening is provided with a shutter mechanism for closing the opening before at least clamping the primary heat treatment mold and the final blow mold.
[0032]
According to the invention, claim 1 ~ 4 In addition to this state, since the secondary heat treatment is performed by an infrared heater, an intermediate molded product made of a synthetic resin that easily absorbs infrared rays can be efficiently heat treated.
[0033]
Infrared heaters are normally used in a fixed state, and when used for heat treatment of a primary blow molded product before shrinkage, the size of the primary blow molded product changes as the heat treatment time elapses. Although it is difficult to arrange and control the temperature, the residual stress is removed by the shrinkage of the intermediate molded product that has already been shrunk so that the residual stress is removed. Becomes easier.
[0035]
Furthermore, by making it possible to close the opening for transporting the secondary heat treatment box with the shutter mechanism, the intermediate molded product can be heated by the atmosphere in the secondary heat treatment box in addition to the heat treatment by the radiant heat of the infrared heater. it can.
[0036]
Furthermore, the intermediate molded product can be prevented from being cooled by the air during clamping by closing the opening with the shutter mechanism before clamping the primary heat treatment mold and the final blow molding mold.
[0037]
The invention of claim 6 is the invention of claim 5,
In the secondary heat treatment box, a shielding plate for shielding the vicinity of the neck portion of the intermediate molded product from the infrared heater, and a cooling air supply means for supplying cooling air to the vicinity of the neck portion of the intermediate molded product And is provided.
[0038]
According to the present invention, in addition to the state of claim 5, the vicinity of the neck portion of the intermediate molded product can be shielded from the infrared heater by the shielding plate provided in the secondary heat treatment box. It is possible to more reliably prevent the adverse effects caused by.
[0039]
Further, by supplying cooling air to the vicinity of the neck portion of the intermediate molded product by the cooling air supply means, it is possible to further prevent the neck portion from being deformed.
[0040]
The invention of claim 7 is the invention of claim 6,
A plurality of the infrared heaters are provided in the longitudinal direction of the intermediate molded product. Among them, the infrared heater for mainly heating the shoulder portion and the heel portion of the intermediate molded product is more than the other infrared heaters. It is arranged near the longitudinal axis of the intermediate molded product.
[0041]
According to the present invention, in addition to the state of claim 6, in particular, the vicinity of the shoulder portion and the heel portion where heat resistance tends to be reduced can be more actively heated than the other portions, so that the heat resistance is improved. be able to.
[0042]
Also in this case, the heater arrangement can be set in advance in order to heat-treat the intermediate molded product after shrinkage, and it is difficult to set when the primary blow-molded product before shrinkage is heat-treated outside the mold.
[0043]
The invention of claim 8 is a heating station that heats a plurality of preforms in parallel in a direction orthogonal to the preform conveying direction;
A plurality of preforms heated at the same time in the heating station are simultaneously blow-molded by a primary blow molding die. blow A primary blow molding part for molding a molded product;
A plurality of primary blow-molded in the primary blow-molded part blow A primary heat treatment part for simultaneously heat-treating the molded product in contact with the inner surface of the primary heat treatment mold while pressurizing the molded product from within the primary heat treatment mold;
Primary heat treatment Part A secondary heat treatment section that simultaneously heat-treats a plurality of intermediate molded products that have undergone the heat treatment outside the mold,
Secondary heat treatment Part A final blow molding section that simultaneously blow-molds a plurality of intermediate molded products that have undergone a final molded product shape in a heated final blow mold,
It is arranged in a straight line along the conveying direction of the preform.
[0044]
According to the present invention, by arranging the heating station, the primary blow molding part, the primary heat treatment part, the secondary heat treatment part, and the final blow molding part in a straight line along the conveying direction of the preform, The device does not spread in the direction perpendicular to the preform conveyance direction, and can be arranged with a minimum area, and the installation area can be reduced to save space. The indoor area of the clean atmosphere for forming the container can be effectively utilized.
[0045]
In addition, the heating station transports and heats multiple preforms in parallel in the direction perpendicular to the transport direction, so many preforms can be transported and heated at the same time, minimizing the preform transport space. Thus, the heating efficiency can be improved.
[0046]
Further, the primary heat treated in the primary heat treatment mold in the primary heat treatment section. blow In the molded product, crystallization is promoted, and residual strain is removed by shrinkage that occurs when the molded product is removed from the mold.
[0047]
Furthermore, the softened and contracted intermediate molded product is heat-treated outside the mold in the secondary heat treatment part to further promote crystallization and improve heat resistance, and at the end of heat treatment, the temperature during exhaust and transport Final blow by lowering form It is possible to prevent deterioration of shapeability at the time.
[0048]
Moreover, even if the heat treatment time in the primary heat treatment mold in the primary heat treatment section is shortened, the heat treatment can be performed outside the mold in the secondary heat treatment section, so that the molding cycle can be shortened and the productivity can be remarkably improved. it can.
[0049]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.
[0050]
1-17 is a figure which shows the shaping | molding apparatus of the heat-resistant container which concerns on one embodiment of this invention.
[0051]
FIG. 1 is a plan view showing the overall configuration of a heat-resistant container molding apparatus 100, and FIG. 2 is a side view thereof.
[0052]
In this heat-resistant container molding apparatus 100, a supply unit 110, a heating station 112, a transfer unit 114, and a blow molding station 116 are linearly arranged along the conveying direction A of the preform 118.
[0053]
The supply unit 110 supplies a preform 118 having a neck portion 120 (see FIGS. 7 and 8) to the heating station 112, and includes a supply rail 122, an alignment mechanism 124, and a reverse delivery mechanism 126.
[0054]
As shown in FIG. 3, the supply rail 122 is disposed along the conveying direction A of the preform 118 and is disposed so as to be inclined downward toward the alignment mechanism 124. The lower part of the part 120 is supported and the preform 118 can be continuously conveyed by its own weight in an upright state. A supply stopper 130 that can be opened and closed by an open / close cylinder 128 is disposed at the end of the supply rail 122 on the alignment mechanism 124 side.
[0055]
As shown in FIG. 3, the alignment mechanism 124 receives three preforms 118 continuously supplied by the supply rail 122 and aligns them at a predetermined pitch in a direction orthogonal to the conveying direction A of the preforms 118. A pair of holding members 132a and 132b for holding the reform 118 in an upright state, and the pair of holding members 132a and 132b are moved to the position of the supply rail 122 to receive three preforms 118 at a predetermined delivery position. And a transfer mechanism 134 for positioning.
[0056]
The holding member 132a has two notches 136, 136 for receiving the lower part of the neck portion of the preform 118 at a predetermined pitch, and the holding member 132b has one notch 136, Along the guide 138, the preform 118 is slidable in a direction orthogonal to the conveying direction A of the preform 118. Further, a guide 140 for preventing the preform 118 from dropping is disposed at a position facing the notch 136 of each holding member 132a, 132b. The fall prevention guide 140 is made movable with respect to the holding members 132a and 132b by the drive cylinder 142, and the guide 118 is inserted in the notch 136 of the holding members 132a and 132b. 140 is advanced to the holding members 132a and 132b side to prevent the preform 118 from falling, and to prevent the preform 118 from retreating when removing the preform 118 from the holding members 132a and 132b. Yes.
[0057]
The transfer mechanism 134 includes a rodless cylinder 144 connected to one holding member 132a, a stopper rod 146 that slidably connects the holding member 132a to the holding member 132b, and a stopper 148 that stops the holding member 132b at a predetermined position. With.
[0058]
3, when the holding member 132a is moved to the left in the drawing along the supply linear guide 138 by the rodless cylinder 144, the holding member 132a comes into contact with the holding member 132b and is held together with the holding member 132a. The member 132b moves to the left, passes through the position of the supply rail 122, stops at the position on the left side of the supply linear guide 138, and enters a standby state. When moving to this standby position, the supply stopper 130 of the supply rail 122 is opened, and the preform 118 is inserted into the notch 136 of the holding members 132b and 132a. In the standby position, a mounting table (not shown) of the opening / closing cylinder 128 of the supply stopper 148 serves as a guide for preventing the preform 118 from falling from the holding members 132a and 132b. When the rodless cylinder 144 is moved to the right in the figure from this state, the holding member 132b is moved by being pulled by the stopper rod 146 together with the holding member 132a. Is stopped in contact with the stopper 148, and the holding members 132a and 132b are stopped at a position having a predetermined interval as shown in FIG.
[0059]
4 and 5, the reverse delivery mechanism 126 reverses the three preforms 118 held and aligned by the holding members 132a and 132b from the upright state to the heating station 112 in the inverted state. It is provided with three first gripping members 150, a first opening / closing mechanism 152, a first lifting / lowering mechanism 154, and a first reversing mechanism 156.
[0060]
The first gripping member 150 is held by the holding members 132a and 132b and is used to grip the neck portion 120 of the preform 118 at the delivery position, and is disposed at a position corresponding to the preform 118 at the delivery position. Has been. Each first gripping member 150 includes a pair of gripping arms 158a and 158b.
[0061]
The first opening / closing mechanism 152 opens and closes the holding arms 158a and 158b of the first holding members 150 to hold and release the preform 118. A pair of slide rods 160a and 160b arranged in parallel, A holding member opening / closing cylinder 162.
[0062]
One slide rod 160a is attached and fixed to one gripping arm 158a and slidably penetrates the other gripping arm 158b. The other slide rod 160b slidably penetrates one gripping arm 158a, and the other gripping arm 158b is attached and fixed. The pair of slide rods 160 a and 160 b has a rack portion 164 formed at a position near the center thereof, and a pinion 166 is engaged between the rack portions 164.
[0063]
The gripping member opening / closing cylinder 162 is connected to one slide rod 160a, and by sliding the one slide rod 160a and sliding the other slide rod 160b in the opposite direction via the pinion 166, the gripping member opening / closing cylinder 162 is provided. The grip arms 158a and 158b are opened and closed.
[0064]
As shown in FIG. 5, the first elevating mechanism 154 moves the first gripping member 150 up and down to take out and deliver the preform 118. The first lifting member 150, the first opening / closing mechanism 152, the first A support bracket 170 that supports the support frame 168 attached with the reversing mechanism 156 so as to be movable up and down, and a lift cylinder 172 that moves the support frame 168 up and down along the support bracket 170 are provided.
[0065]
The first reversing mechanism 156 reverses the first gripping member 150 and includes a reversing actuator 174 attached to the support frame 168. The reversing actuator 174 rotates the first opening / closing mechanism 152 by 180 degrees with respect to the support frame 168 so that the first gripping member 150 is reversed.
[0066]
Then, the first opening / closing mechanism 152 causes the first opening / closing mechanism 152 to move the first holding member 150 to the raised position by the first lifting mechanism 154 and the first holding member 150 to the alignment mechanism 124 side by the first reversing mechanism 156. The first holding member 150 is opened, and the first holding member 150 is lowered by the first elevating mechanism 154, and then the first holding member 150 is closed by the first opening / closing mechanism 152, whereby the holding members 132a and 132b are held. The neck portion 120 of the preform 118 is gripped. Further, by lifting the first gripping member 150 by the first elevating mechanism 154 from this state, the preform 118 is taken out from the holding members 132a and 132b. Further, in this state, the first gripping member 150 is reversed by the first reversing mechanism 156 to bring the preform 118 into an inverted state, and the first gripping member 150 is lowered by the lifting mechanism 154 at that position, so that the first opening / closing mechanism By opening the first gripping member 150 by 152, the preform 118 is delivered to the heating station 112.
[0067]
The heating station 112 heats the preform 118 supplied from the supply unit 110 as shown in FIGS. 1, 2, and 6 to 8. The heating station 112 includes two first conveyance paths 200 arranged in parallel with each other. A heating box 202 and a rotation mechanism 204 are provided.
[0068]
One of the two first conveyance paths 200 conveys two preforms 118 in parallel, and the other first conveyance path 200 conveys one preform 118.
[0069]
Each first conveying path 200 includes a plurality of first conveying members 206 that support the preform 118 delivered from the supply unit 110 in an inverted state, and the plurality of first conveying members 206 are conveyed in the conveying direction A of the preform 118. A first transport mechanism 208 that intermittently transports the first transport mechanism.
[0070]
Two first conveying members 206 are provided in a direction orthogonal to the conveying direction A of the preform 118 in each first conveying path 200, and the two first conveying members 206 are in the conveying direction of the preform 118. A plurality are arranged along A at a predetermined interval.
[0071]
Each first conveying member 206 is rotatably attached to the bracket 212, and the preform support portion 214 protrudes from the upper surface of the bracket 212, and the neck portion 120 of the preform 118 is inserted into the preform support portion 214. The preform 118 can be supported in an inverted state. A rotation sprocket 216 is attached to the lower end of each first transport member 206.
[0072]
Each first transport mechanism 208 includes a first transport chain 218 and a first transport actuator 220.
[0073]
Each first transport chain 218 is disposed between the two first transport members 206 along the transport direction of the preform 118, supported by the driven sprocket 222 on the supply unit 110 side, and first on the transfer unit 114 side. 1 is supported by a drive sprocket (not shown) connected to the transport actuator 220. An intermediate portion of the bracket 212 to which the first transport member 206 is attached is connected and fixed to the first transport chain 218. The first transport chain 218 is guided by a first transport rail 224 disposed along the first transport path 200.
[0074]
The first transport actuator 220 intermittently drives the first transport chain via a drive sprocket (not shown), and includes a cam 226 and a stopper device 228.
[0075]
The cam 226 has a notch 230 for intermittent stop provided on the outer periphery every 90 degrees.
[0076]
The stopper device 228 includes a cam follower 232 engaged with the notch 230 of the cam 226 and an air cylinder 234 for driving the cam follower 232. By driving the air cylinder 234, the cam follower 232 is engaged with the notch 230 of the cam 226, and the first transport actuator 220 is intermittently stopped every 90 degrees.
[0077]
The heating box 202 is a set of two pieces disposed on both sides of the first conveyance path 200 in the middle of each first conveyance path 200, and the two sets of heating boxes 202 are formed into the preform 118. Two sets are provided upstream and downstream along the conveyance direction A.
[0078]
Further, an interval corresponding to one preform 118 is provided between the upstream and downstream heating boxes 202, and the preform 118 is intermittently stopped at this position, and is heated by the upstream heating box 202. The temperature difference between the inner and outer surfaces of the preform 118 can be relaxed and supplied to the heating box 202 on the downstream side. Note that the interval between the upstream and downstream heating boxes 202 is not limited to the interval of one preform 118 but can be changed depending on the thickness of the preform 118.
[0079]
Further, a reflecting plate 236 is provided between the two heating boxes 202 along the conveying direction A of the preform 118 so as to block the two preforms 118.
[0080]
Each heating box 202 includes a plurality of heaters 238 along the conveying direction A of the preform 118 in the axial direction of the preform 118. As shown in the second heating box 202 from the left in FIG. 8, these heaters 238 are supported so as to be movable back and forth with respect to the preform 118, and the temperature distribution in the axial direction of the preform 118 can be adjusted. ing.
[0081]
Each heating box 202 is in a state in which a reflector 240 is provided on the back side of the heater 238 and a terminal block 242 is provided at the upper end. The lower part of each heating box 202 is supported on the bed 246 by a hollow support foot 244 communicating with the inside of the heating box 202, and the support foot 244 is connected to a blower 248 attached in the bed 246.
[0082]
Then, cooling air is supplied from the blower 248 to the back side of the reflector 240 in the heating box 202 through the support legs 244, and this cooling air is allowed to escape above the heating box 202. As a result, overheating of the reflector 240 can be prevented, the life of the reflector 240 can be extended, the terminal block 242 is also cooled by the cooling air that flows upward, and the cooling air sent from the blower 248 is The heaters 238 extending in the conveying direction A of the preform 118 are also brought into contact with both end support portions, and the support portions at both ends that are most likely to be damaged by heat are cooled, thereby extending the life of the heater.
[0083]
As shown in FIG. 6, the rotation mechanism 204 includes a first rotation chain 250 and a second rotation chain 252.
[0084]
The first rotation chain 250 is located between the two first conveyance paths 200, and includes four driven sprockets 254 and 270, a drive sprocket 258 connected to a rotation motor (not shown), and a sprocket 260 for applying tension. It is in a state of being hung around.
[0085]
Two second rotation chains 252 are provided corresponding to the first conveying members 206 conveyed in two rows of the first conveying paths 200, respectively, and are respectively spanned to the two sprockets 262a and 262b. The second rotation chain 252 is in a supported state and meshes with the rotation sprocket 216 of the first conveyance member 206 conveyed in two rows of the first conveyance paths 200.
[0086]
A sprocket 254 a provided integrally with the driven sprocket 254 is connected by a chain 266 and a sprocket 264 interlocking with one of the two rows of sprockets 262 a. Via the sprocket 264.
[0087]
Accordingly, when the driving sprocket 258 is rotated by the rotation motor 256 to rotate the first rotation chain 250, the driven sprocket 254, the sprocket 264, the gear 268, and the sprocket 262a rotate as indicated by the arrows in the drawing, and the second The sprocket for rotation of the first conveying member that meshes with the chain for rotation rotates in the direction opposite to the conveying direction A of the preform to rotate the preform.
[0088]
Then, by heating the preform 118 while rotating in this way, the preform 118 can be heated uniformly in the circumferential direction.
[0089]
As shown in FIGS. 9 to 12, the transfer unit 114 transfers the three preforms 118 heated by the heating station 112 to the blow molding station 116 in an inverted state, and between the preforms 118. And a pitch changing mechanism 504 for converting the pitch into a blow molding pitch at the blow molding station 116.
[0090]
The transfer mechanism 502 and the pitch changing mechanism 504 are attached to a frame 508 supported above the transfer unit region by a support column 506.
[0091]
The transfer mechanism 502 includes three second gripping members 510 that grip the neck portion 120 of the preform 118, and a second opening / closing mechanism 512 that opens and closes the second gripping member 510 to grip and release the preform 118. A second lifting mechanism 514 that allows the second gripping member 510 to move up and down, and a moving mechanism 516 that moves the second gripping member 510 from a gripping position on the heating station 112 side to a receiving position on the blow molding station 116 side, Is provided.
[0092]
The second gripping member 510 is composed of a pair of gripping arms 510a and 510b arranged to face each other so as to grip the neck portion 120 of the preform 118. There are two second gripping members 510 on the side of the first transport path 200 and the other first transport path 200 corresponding to the positions of the preforms 118 transported by the two first transport paths 200. One is arranged on the side. Each of the second gripping members 510 is provided with a pair of gripping arms 510a and 510b extending in the vertical direction so that the neck portion 120 of the preform 118 can be gripped at the lower end thereof.
[0093]
A pair of second opening / closing mechanisms 512 is provided so as to be able to open and close the number of second gripping members 510 corresponding to the preforms 118 conveyed by the respective first conveying paths 200.
[0094]
Each second opening / closing mechanism 512 opens and closes the holding arms 510a and 510b of each second holding member 510 to hold and release the preform 118, and a pair of slide rods 518a and 518b arranged vertically in parallel. And a gripping member opening / closing cylinder 520.
[0095]
One slide rod 518a is attached and fixed to one gripping arm 510a and slidably penetrates the other gripping arm 510b. The other slide rod 518b is slidably penetrated through one gripping arm 510a, and the other gripping arm 510b is attached and fixed. In addition, the pair of slide rods 518 a and 518 b have rack portions 522 formed at opposite positions near the end portions, and a pinion 524 is engaged between the rack portions 522.
[0096]
The holding member opening / closing cylinder 520 has one slide rod 518. b This one slide rod 518 is connected to b Slide the other slide rod 518 a Is slid in the opposite direction via the pinion 524 to open and close the gripping arms 510a and 510b of the second gripping member 510.
[0097]
The second elevating mechanism 514 raises and lowers the second gripping member 510 to take out and pass the preform 118. The second opening / closing mechanism 512 is supported so as to be movable up and down, and the support bracket 526 An elevating cylinder 530 to which an elevating rod 528 is connected is provided, and the second gripping member 510 can be moved up and down as the second opening / closing mechanism 512 is moved up and down.
[0098]
The moving mechanism 516 moves the second gripping member 510 from the preform 118 take-out position of the heating station 112 to the delivery position to the blow molding station 116, and includes a rodless cylinder 532, a moving guide rod 534, and a moving member 536. An approaching / separating movement guide rod 538 and an approaching / separating movement member 540.
[0099]
The rodless cylinder 532 is disposed along the conveying direction A of the preform 118 at a substantially central position of the frame 508.
[0100]
A pair of moving guide rods 534 are arranged in parallel on both side positions of the rodless cylinder 532.
[0101]
The moving member 536 is connected to the rodless cylinder 532 and is slidably engaged with the moving guide rod 534 so as to be movable in the conveying direction A of the preform 118.
[0102]
The contact / separation moving guide rod 538 is disposed in a direction perpendicular to the conveying direction A of the preform 118, and is attached to the moving member 536 near the center so as to be movable in the conveying direction A of the preform 118. .
[0103]
The contact / separation moving member 540 is slidably supported with respect to the contact / separation movement guide rod 538 as a pair on both sides of the contact / separation movement guide rod 538 with the movement guide rod 534 interposed therebetween.
[0104]
The lift cylinder 530 is attached to and supported by the contact / separation moving member 540.
[0105]
Therefore, when the moving member 536 is moved in the transport direction A of the preform 118 along the movement guide rod 534 by the rodless cylinder 532, the second movement is performed via the contact / separation movement guide rod 538 and the pair of contact / separation movement members 540. The elevating mechanism 514 also moves, and the two second gripping members 510 connected to the second elevating mechanism 514 via the second opening / closing mechanism 512 respectively convey the preform 118 on both sides of the moving guide rod 534. It will move in the direction A.
[0106]
The pitch changing mechanism 504 includes a pair of pitch changing guide rods 542 disposed on the outer side of the moving guide rod 534 so that the width becomes narrower from the heating station 112 side to the blow molding station 116 side. Each pitch changing guide rod 542 is connected to the contact / separation moving member 540 via the bracket 544 so that the contact / separation moving member 540 can move along the pitch changing guide rod 542.
[0107]
When the contact / separation moving guide rod 538 moves as the moving member 536 moves in the conveyance direction A of the preform 118, each contact / separation moving member 540 moves in a state of being guided by the pitch changing guide rod 542. Then, each contact / separation moving member 540 gradually slides on the contact / separation movement guide rod 538 and moves in the proximity direction, and when the second gripping member 510 reaches the receiving position of the blow molding station 116, The pitch at the time of molding is set.
[0108]
Next, when transferring the preform 118 in such a transfer unit 500, first, each second gripping member 510 is positioned on the preform 118 take-out side of the heating station 112, and the second lifting mechanism 514 performs the second operation. The gripping member 510 is lowered to the gripping position, and the second opening / closing mechanism 512 is put on standby with the second gripping member 510 opened.
[0109]
Next, at the heating station 112, when the preform 118 heated in an inverted state is conveyed to the receiving position and stopped, the second holding member 510 is closed by the second opening / closing mechanism 512, and the neck portion 120 of the preform 118 is closed. Then, the second lifting / lowering mechanism 514 raises the second gripping member 510 and removes the neck portion 120 of the preform 118 from the first transport member 206.
[0110]
Next, when the moving member 536 is moved in the transport direction A of the preform 118 along the moving guide rod 534 by the rodless cylinder 532, the contacting / separating moving guide rod 538 and the pair of contacting / separating moving members 540 are used. The second elevating mechanism 514 also moves, and the second gripping member 510 connected to the second elevating mechanism 514 via the second opening / closing mechanism 512 conveys the preform 118 on both sides of the moving guide rod 534, respectively. Move in direction A.
[0111]
As the moving member 536 moves in the conveying direction A of the preform 118, when the contact / separation moving guide rod 538 moves, each contact / separation moving member 540 moves while being guided by the pitch changing guide rod 542. When each of the contact / separation moving members 540 gradually slides on the contact / separation movement guide rod 538 and moves in the proximity direction, the second gripping member 510 reaches the receiving position of the blow molding station 116, and then blow molding is performed. It becomes the pitch of time.
[0112]
In this state, when the second conveying member 408 is intermittently conveyed along the second conveying path 400 to the receiving unit 402 of the blow molding station 116 and stops, the second holding member 510 is lowered by the second elevating mechanism 514, By opening the second gripping member 510 by the second opening / closing mechanism 512, the preform 118 is delivered to the second conveying member 408 of the blow molding station 116.
[0113]
Further, from this state, the second lifting / lowering mechanism 514 raises the second gripping member 510 and retracts it from the second transport path, whereby the second transport path 40. 0 Thus, the preform 118 can be conveyed.
[0114]
Then, when the moving member 536 is moved to the heating station 112 side by the rodless cylinder 532 and the second gripping member 510 is lowered by the second elevating mechanism 514, the next extraction standby state is entered.
[0115]
As shown in FIGS. 1 and 2, the blow molding station 116 includes a second transport path 400, a receiving unit 402, a primary blow molding unit 403, a primary heat treatment unit 404, a secondary heat treatment unit 405, and a final blow process. A molding unit 406 and an extraction unit 407 are provided.
[0116]
The second transport path 400 has a substantially rectangular shape having a short side and a long side, and is arranged with one side of the short side facing the transfer unit 114. The second transport member 408 and the second transport mechanism 410 are arranged. With.
[0117]
The second transport members 408 support and transport the preforms 118 in an inverted state, and are supported one by one on the brackets 414 with the preform support portions 412 protruding upward.
[0118]
The second transport mechanism 410 intermittently circulates a plurality of second transport members 408, and a second transport chain 418 is stretched around four sprockets 416 disposed at the transport path corners of the second transport path 400. It is in a state of being arranged in a rectangular shape. The second transport chain 418 is guided by a second transport rail 420 arranged along the transport path of the second transport path 400. Further, the second transport chain 418 is connected to the second transport member 408 through the bracket 414 at every three blow molding pitches.
[0119]
Further, an intermittent conveyance motor (not shown) is connected to any one of the four sprockets 416, and is intermittently conveyed every three second conveyance members 408 by this intermittent conveyance motor.
[0120]
The receiving unit 402 is provided on the short side arranged on the transfer unit 114 side of the second transport path 400, and receives three preforms 118 from the transfer unit 114, and corresponds to the second gripping member 306 in the transfer unit 114. The three second conveying members 408 are intermittently stopped at the position. Further, as shown in FIGS. 9 and 11, the three second conveying members 408 stopped by the receiving unit 402 are moved by a positioning plate 552 that is moved forward and backward by the positioning cylinder 550 with respect to the second conveying member 408. It is positioned to ensure receipt of the preform 118.
[0121]
The primary blow molding unit 403, the primary heat treatment unit 404, the secondary heat treatment unit 405, and the final blow molding unit 407 are arranged linearly along one side of the long side of the second conveyance path 400. Thus, the primary blow molding part 403, the primary heat treatment part 404, the secondary heat treatment part 405, and the final blow molding part 40 6 By arranging these in a straight line, the short side of the blow molding station 116 is prevented from spreading and the installation area is minimized. Further, the primary blow molding unit 403, the primary heat treatment unit 404, and the final blow molding unit 40 6 By installing a mold clamping mechanism such as in the space between the long sides, the space between the long sides can be used effectively.
[0122]
The primary blow molding unit 403 has a primary blow molding mechanism 600 on the second conveyance path 400, the primary heat treatment unit 404 has a primary heat treatment mechanism 602 on the second conveyance path 400, and the secondary heat treatment unit 405 has a second heat treatment unit 405. A secondary heat treatment box 604 is provided on the conveyance path 400, and the final blow molding unit 40 is further provided. 6 Has a final blow molding mechanism 606 on the second conveyance path 400.
[0123]
Then, three preforms 118 heated at about 100 to 120 ° C. at the heating station 112 are received by the receiving unit 40. 2 Is transferred to the primary blow molding unit 403 along the second transfer path 400 and is longitudinally moved in the primary blow molding die 608 composed of a split mold cooled to about 30 ° C. of the primary blow molding mechanism 600. A primary blow-molded product 610 larger than the final molded product 428 is molded by being blown in the horizontal direction with high-pressure air while being stretched by a stretching rod.
[0124]
Next, along the second transfer path 400, 5-25 kg / cm from the inside in the primary heat treatment mold 612 composed of a split mold that is transported to the primary heat treatment unit 404 and heated to 150-220 ° C. of the primary heat treatment mechanism 602. Heat treatment is performed by contacting the inner surface of the primary heat treatment mold 612 while pressing at a high pressure. If this heat treatment time is short, the productivity is improved, but the crystallinity of the intermediate molded product is low and the strain is not completely removed, and if it is long, the crystallinity is high and the strain is completely removed and the shrinkage is almost reduced. No, but productivity is low. This time setting can be appropriately selected according to the purpose of the producer, but about 2 to 10 seconds is an appropriate range from the viewpoint of production and heat resistance. After the heat treatment by the primary heat treatment mold 612 is completed, when the primary heat treatment mold 612 is opened, the primary blow molded product 610 is contracted to remove distortion, and an intermediate molded product 614 slightly smaller than the final molded product 428 is obtained. It has become.
[0125]
Next, along the second transfer path 400, it is transferred to the secondary heat treatment unit 405 and sufficiently heat-treated in the secondary heat treatment box 604. This heating temperature is preferably higher than the temperature of the primary heat treatment mold 612, and compensates for the heat treatment of the intermediate molded product 614. By this heat treatment, the intermediate molded product 614 is heated with almost no shrinkage, and this heat treatment can shorten the heat treatment time in the primary heat treatment mold 612 and improve productivity while maintaining heat resistance. Is also possible.
[0126]
The intermediate molded product 614 for which the secondary heat treatment has been completed is conveyed to the final blow molding unit 406 along the second conveyance path 400 and the final blow molded die 616 including the split mold of the final blow molding mechanism 606 is used for the final molded product 428. It is designed to be blow molded into a shape. Since some distortion occurs due to stretching during the final blow molding and the heat resistance is lowered, the final blow molding die 616 is preferably heated to a temperature higher than a desired heat resistance temperature, for example, 80 to 130 ° C. Further, the intermediate molded product 614 is smaller than the final molded product 428, and the contracted state by the heat treatment by the primary heat treatment mold 612 is extremely stable, and there is little eccentricity and local deformation, and further, the shrinkage by the secondary heat treatment. Therefore, there is no fear of pinching when the final blow molding die 616 is closed, and efficient molding can be performed. Furthermore, since the intermediate molded product 614 is heat-treated in the secondary heat treatment unit 405, the temperature does not decrease during final blow molding, and molding with good shapeability can be performed.
[0127]
The primary blow molding mechanism 600, the primary heat treatment mechanism 602, and the final blow molding mechanism 606 described above have substantially the same configuration except that the primary blow molding die 608, the primary heat treatment die 612, and the final blow molding die 616 are different. Therefore, in the following, the primary heat treatment mechanism 602 and the secondary heat treatment box 604 will be described, and detailed description of the primary blow molding mechanism 600 and the final blow molding mechanism 606 will be omitted.
[0128]
FIG. 13 shows a primary heat treatment mechanism 602.
[0129]
The primary heat treatment mechanism 602 is configured such that the primary heat treatment mold 612 can be opened, closed, and clamped by driving a pair of mold clamping plates 620 supporting the primary heat treatment mold 612 through a toggle mechanism 622 with a mold clamping cylinder 632. Yes.
[0130]
Primary heat treatment type 6 1 A raised bottom mold 626 that can be moved up and down by a raised bottom lifting mechanism 624 is disposed above 2 and is clamped to the primary heat treatment mold 612.
[0131]
Primary heat treatment type 6 1 2, an embedded heater 628 is provided so that the primary heat treatment mold 602 can be heated.
[0132]
In addition, primary heat treatment mold 6 1 2 and the mold clamping plate 620, a heat insulating plate 630 is provided, and the primary heat treatment die 6 1 No. 2 heat is not transmitted to the mold clamping plate 620 side.
[0133]
And primary heat treatment mold 6 1 2 is in an open state between the primary heat treatment mold 602 with the mold open. blow The primary heat treatment mold 602 and the raised bottom mold 626 are closed and clamped in a state where the molded product is carried in.
[0134]
FIGS. 14 to 16 show a secondary heat treatment box 604 for heat-treating the intermediate molded product 614 taken out from the primary heat treatment mold 612 and contracted by infrared heaters 666a to 666h disposed further outside.
[0135]
At the front and rear positions of the secondary heat treatment box 604 in the transport direction A, an opening 670 for transporting the intermediate molded product 614 is formed in a size that allows the primary blow molded product 610 to pass therethrough. A shutter mechanism 676 having a shutter 674 that opens and closes the opening 670 by a shutter opening / closing cylinder 672 is provided. This shutter mechanism 67 6 Opens at the time of carrying in / out the intermediate molded product, and the primary heat treatment mold 6 1 2 and the final blow mold 616 can be closed before the opening 670 is closed. Therefore, in this secondary heat treatment box 604, in addition to the heat treatment by the radiant heat by the infrared heaters 666a to 666h, the heating in the atmosphere in the secondary heat treatment box 604 is performed. 1 2 and the final blow molding die 616 can prevent the intermediate molded product from being cooled by air at the time of clamping.
[0136]
In addition, the infrared heaters 666 a to 666 h are shown as a cross section here, and eight infrared heaters 666 a to 666 h are arranged along the longitudinal direction of the intermediate molded product 614 and extend along the conveying direction of the intermediate molded product 614.
[0137]
The types of the infrared heaters 666a to 666h can be appropriately selected from long-wavelength infrared (far-red), medium-wavelength infrared, and short-wavelength infrared (near-red). Generally, plastic is said to be easily absorbed by the medium-wavelength system. Yes. Here, a short wavelength infrared (near infrared, maximum energy wavelength: 1.0 to 2.0 μ) heater manufactured by Helius is used.
[0138]
The temperature of the heating elements of the infrared heaters 666a to 666h is preferably set to about 300 to 2000 ° C., and is preferably set to be at least equal to or higher than the temperature of the primary heat treatment mold 602 (150 to 220 ° C.).
[0139]
However, it is preferable to adjust the ON / OFF of the infrared heaters 666a to 666h, the voltage amount (%), and the distance from the intermediate molded product 614 so that the temperature of the intermediate molded product 614 does not excessively increase. .
[0140]
As shown in the drawing, the infrared heaters 666a and 666h corresponding to the shoulder portion 682 and the heel portion 684 are preferably closer to the longitudinal axis of the intermediate molded product 614 than the body portion 686.
[0141]
This is because the shoulder portion 682 and the heel portion 684 may be smaller in diameter than the other body portions 686, but the primary heat treatment mold 6 1 There is an object to heat a part with poor heating efficiency due to 2 particularly quickly.
[0142]
It is also effective to increase the amount of power of the infrared heaters 666a and 666h in these portions higher than in other portions.
[0143]
Since the intermediate molded product 614 is already brought into the secondary heat treatment box 604 after being contracted, the portion of the intermediate molded product 614 where the height position of each of the infrared heaters 666a to 666h is heated is heated. Therefore, various adjustments of the infrared heaters 666a to 666h, such as height adjustment, can be easily performed according to the purpose.
[0144]
A reflector 688 is provided on the opposite side of the infrared heaters 666a to 666h. This is an intermediate molded product 6 14 is used in order to effectively use infrared rays that have passed through 14.
[0145]
Further, in the vicinity of the neck portion 120, shielding plates 700 are provided on both sides along the transport direction in order to protect the neck portion 120 and the second transport member 408 from infrared rays.
[0146]
Although this shielding plate 700 is fixed, when heating of the intermediate molded product 614 in the secondary heat treatment box 604 is performed in a state where the conveyance is stopped, the shielding plate 700 is cut into the outer portion under the neck portion 120. You may make it open and close.
[0147]
Further, a cooling air nozzle 702 for supplying cooling air from a cooling air source as a cooling air supply means is provided near the neck portion 120 of the intermediate molded product 614 at the lower portion of the secondary heat treatment box 604, and further. The neck is protected from heating. Further, the second conveying member 408 in the secondary heat treatment box 604 is rotated by a rotation mechanism 708 having a rotation chain 706 driven by a rotation motor 704, thereby the intermediate molded product 614. Are uniformly heat-treated in the circumferential direction.
[0148]
The take-out part 407 is provided on the other short side facing the receiving part 402, and takes out the container 428 formed by the stretch blow molding device 422 of the blow molding part 404, and is conveyed to the position of the take-out part 407. A take-out device 430 for taking out the individual containers 428 is installed facing the second transport path 400 at the take-out position.
[0149]
As shown in FIG. 17, the take-out device 430 has four third gripping members disposed at positions facing the neck portion 120 of the container 428 by a mechanism substantially similar to the reverse delivery mechanism 126 in the supply unit 110. 432 and the third gripping member 432 are opened and closed. Not shown Open and close Da Have Not shown Third switch Structure , Third gripping part Material A second reversing mechanism 440 having a reversing actuator 438 for reversing, a third elevating mechanism 444 having a lifting cylinder 442 that lifts and lowers the third gripping member 432 together with the third opening / closing mechanism 436 and the second reversing mechanism 440, and an advancing / retreating cylinder 446 are provided. And an advance / retreat mechanism 448.
[0150]
And it waits in the state which retracted from the 2nd conveyance path 400 of the extraction part 407 by the advance / retreat cylinder 446, and the 3rd holding member 432 opened toward the 2nd conveyance path 400. When the conveyance of the container 428 is stopped by the second conveyance path 400, the third gripping member 432 is advanced by the advance / retreat cylinder 446 to open / close the cylinder Da The neck portion 120 of the container 428 is gripped more tightly. In this state, the third gripping member 432 is lifted by the lifting cylinder 442, and the neck portion 120 of the container 428 is detached from the second transport member 408. Next, the third gripping member 432 is retracted by the advance / retreat cylinder 446, the elevating cylinder 442 is lowered, the third gripping member 432 is reversed by the reversing actuator 438, and the opening / closing cylinder is opened at that position. Da When the third gripping member 432 is opened, the neck portion 120 of the container 428 is opened and dropped and taken out.
[0151]
FIG. 18 is a schematic plan view showing a state in which the two heat-resistant container forming apparatuses of FIGS. 1 to 17 are used in combination.
[0152]
Here, two molding apparatuses 100 for heat-resistant containers are combined in parallel.
[0153]
In each molding apparatus 100, the supply rail 122 of the supply unit 110 and the take-out device 430 are arranged in common, but the arrangement of the heating station 112 and the blow molding station 116 therebetween is symmetrical.
[0154]
Then, the preform 118 is branched from the supply line 750 of the preform 118 so that the preform 118 is continuously supplied to each take-out rail 122. After the blow molding is completed, the preform 118 is carried out from each take-out device 430 by a common belt conveyor 752. Like to do.
[0155]
The present invention is not limited to the above-described embodiment, and can be changed to various embodiments within the scope of the gist of the present invention.
[0156]
For example, in the above embodiment, the supply unit supplies three preforms to the heating station, and the three preforms are transferred from the heating station to the blow molding station via the transfer unit. Not limited to this example, the number of preforms to be conveyed can be arbitrarily changed.
[0157]
In addition, when the preform is transferred from the heating station to the blow molding station, the pitch of the preform is converted to the pitch at the time of blow molding at the blow molding station. If the reforming conveyance pitch is matched with the blow molding pitch in advance, it is not necessary to change the pitch in the transfer section.
[0158]
[Brief description of the drawings]
FIG. 1 is a plan view of a heat-resistant container molding apparatus according to an embodiment of the present invention.
2 is a side view of the apparatus for forming a heat-resistant container in FIG. 1. FIG.
FIG. 3 is a plan view of an alignment mechanism in the supply unit of FIG. 1;
4 is a plan view of a reverse delivery mechanism in the supply unit of FIG. 1. FIG.
5 is a front view seen from the direction of arrow V in FIG. 4;
6 is a plan view showing a preform rotation mechanism in the heating station of FIG. 1; FIG.
FIG. 7 is a side view showing a part of the heating station in a cutaway state.
8 is a cross-sectional view showing a state of a heating box in the heating station of FIGS. 1 and 7. FIG.
9 is a plan view showing an outline of changing the pitch of the transfer unit from the heating station of FIG. 1 to the blow molding station. FIG.
FIG. 10 is a plan view showing a mechanism of a transfer unit.
11 is a side view of FIG.
12 is a partial front view showing a state of the gripping member of FIG. 11. FIG.
13 is a side view showing the primary heat treatment mechanism of FIG. 1. FIG.
FIG. 14 is a partially broken side view showing a state of a secondary heat treatment part.
15 is a front view of FIG. 14;
16 is a partially enlarged view of FIG. 15. FIG.
17 is a side view showing a state of the take-out part in the blow molding station of FIG. 1. FIG.
18 is a schematic plan view showing a state in which two heat-resistant container molding apparatuses of FIGS. 1 to 17 are used in combination. FIG.
[Explanation of symbols]
100 Heat blow molding equipment
110 Supply unit
112 Heating station
114 Transfer unit
116 Blow molding station
118 preform
120 neck
124 alignment mechanism
126 Reverse delivery mechanism
132a Holding member
132b Holding member
134 Transfer mechanism
150 First gripping member
152 First opening / closing mechanism
154 First lifting mechanism
156 First reversing mechanism
200 First transport path
202 Heating box
204 Rotation mechanism
206 First conveying member
208 First transport mechanism
300 Transfer mechanism
306 Second gripping member
308 Second opening / closing mechanism
310 Movement mechanism
312 Second lifting mechanism
400 Second transport path
402 Receiving part
403 Primary blow molding part
404 Primary heat treatment section
405 Secondary heat treatment section
406 Final blow molding part
407 Extraction department
408 Second conveying member
410 Second transport mechanism
428 Final molded product
430 Extractor
502 Transfer mechanism
504 Pitch change mechanism
510 Second gripping member
512 Second opening / closing mechanism
514 Second lifting mechanism
516 Movement mechanism
600 Primary blow molding mechanism
602 Primary heat treatment mechanism
604 Secondary heat treatment mechanism
606 Final blow molding mechanism
608 Primary blow mold
610 Primary blow molded product
612 Primary heat treatment type
614 Intermediate molded product
616 Final blow mold
666a to 666h infrared heater
670 opening
676 Shutter mechanism
682 shoulder
684 heel
700 Shield plate
702 Cooling air nozzle
A Preform transport direction

Claims (8)

Transferred from the supply unit for supplying the preform, a heating station for heating the preform supplied from the supply unit, a transfer unit for transferring the preform heated in the heating station, and the transfer unit A blow molding station for blow molding the preform to form a container is disposed on the machine base,
The heating station has a plurality of linear first transport paths arranged in parallel,
The first transport path has one end coupled to the supply unit and the other end coupled to the transfer unit,
The supply unit and the transfer unit each have a mechanism for simultaneously delivering preforms that are simultaneously conveyed in parallel along the first conveyance path,
The blow molding station has a second conveyance path coupled to a transfer unit that intermittently conveys the preform delivered at the same time,
Further, along the second conveyance path, a primary blow-molded part for forming a primary blow- molded product by blow- molding a preform with a primary blow mold, and the primary blow- molded product is added from the inside in the primary heat treatment mold. A primary heat treatment part that heat-treats the inner heat-treated mold in contact with the inner surface of the primary heat-treatment mold, a secondary heat-treatment part that heat-treats the intermediate molded product that has undergone the primary heat treatment outside the mold, and heats the intermediate molded product that has undergone the secondary heat-treatment An apparatus for forming a heat-resistant container, comprising: a final blow molding section for blow molding into a final molded product shape in the final blow mold. In claim 1,
The supply unit includes an alignment mechanism that aligns the same number of preforms as the first conveyance path at a pitch of the first conveyance path, and reverses the preform from an upright state to the first conveyance path in an inverted state. A reversing delivery mechanism that delivers,
The alignment mechanism is configured to receive a holding member that holds a plurality of the preforms in an upright state, and a preform that is simultaneously transferred in parallel along the first transfer path at the continuous transfer position of the preform. A transfer mechanism for transferring and positioning to the delivery position of
The reverse delivery mechanism includes a plurality of first gripping members that grip the neck portions of the preform aligned with the pitch of the first transport path by the alignment mechanism, and the first gripping member that opens and closes the first gripping member. A first opening / closing mechanism for gripping and releasing; a first lifting mechanism for lifting and lowering the first gripping member to take out and delivering the preform; and a reversing mechanism for inverting the first gripping member. An apparatus for forming a heat-resistant container. In claim 1 or 2,
The transfer unit, performed a plurality of second gripping members for gripping the neck portion of the preform which has been heated by the first transport path, the gripping of the preform to open and close the second gripping member, the release A second opening / closing mechanism that lifts and lowers the second gripping member to take out and deliver the preform, and the second gripping member is heated while the top and bottom of the second gripping member are left as they are. An apparatus for forming a heat-resistant container, comprising: a transfer mechanism that has a moving mechanism for moving the station from the station side to the blow molding station side and delivers the inverted preform to the blow molding station in an inverted state . A receiver that receives the preform;
A primary blow molding part for blow molding the preform received by the receiving part with a primary blow molding die to form a primary blow molded product;
A primary heat treatment part for heat-treating the primary blow- molded product blow-molded in the primary blow-molded part by contacting the inner surface of the primary heat-treatment mold while pressurizing from the inside in a primary heat-treatment mold; and an intermediate molded product subjected to the primary heat treatment. A secondary heat treatment section for heat treatment outside the mold;
A final blow molding section for blow molding into the shape of the final molded product in a final blow molding mold in which the intermediate molded product subjected to the secondary heat treatment is heated;
A substantially rectangular conveyance path having a short side and a long side, which conveys each molded product by the number of simultaneous moldings to each part,
The primary blow-molded portion to one side of the long side of the conveying path, the primary thermal processing, molding equipment of the heat-resistant container, characterized in that arranged the second heat treatment section and final blow molding section. In any one of Claims 1-4,
The second heat treatment unit, said disposing a plurality of infrared heaters on the outside of the intermediate product, has a secondary heat treatment box forming the opening for conveying in the longitudinal conveying direction of the intermediate molded article,
An apparatus for molding a heat-resistant container, wherein the opening is provided with a shutter mechanism that closes the opening before at least clamping the primary heat treatment mold and the final blow mold. In claim 5,
Wherein the second heat treatment box, said intermediate molded article of the neck portion near the shield plate for shielding from the infrared heater, the cooling air supply means for supplying cooling et A near said intermediate molded article of the neck portion And a heat-resistant container molding apparatus. In claim 6,
A plurality of the infrared heaters are provided in the longitudinal direction of the intermediate molded product. Among them, the infrared heater for mainly heating the shoulder portion and the heel portion of the intermediate molded product is more than the other infrared heaters. An apparatus for molding a heat-resistant container, which is disposed near the longitudinal axis of the intermediate molded product. A heating station that transports and heats a plurality of preforms in parallel in a direction perpendicular to the preform transport direction;
A primary blow-molded part that simultaneously blow-molds a plurality of preforms heated simultaneously in the heating station by a primary blow-molding die to form a primary blow- molded product;
A primary heat treatment part for simultaneously heat-treating a plurality of primary blow- molded products blow-molded in the primary blow-molded part by bringing them into contact with the inner surface of the primary heat treatment mold while pressing from the inside in a primary heat treatment mold
A secondary heat treatment part for simultaneously heat-treating a plurality of intermediate molded products that have undergone the primary heat treatment part outside the mold; and
A final blow molding part for simultaneously blow molding into the shape of the final molded product in a final blow molding die in which a plurality of intermediate molded products that have undergone the secondary heat treatment part are heated,
An apparatus for forming a heat-resistant container, wherein the apparatus is arranged linearly along the conveying direction of the preform.

Images