JP4699680B2 - Rubber sheet processing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rubber sheet processing apparatus.
[0002]
[Prior art]
As a conventional apparatus for cutting a continuous rubber sheet in its width direction, an apparatus having an upper cutting blade and a lower cutting blade is known, and these blade edges are rubbed together with a rubber sheet interposed therebetween. There is a thing cut | disconnected by the thing (for example, refer patent document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-217184
[Problems to be solved by the invention]
However, the rubber sheet to be cut includes raw rubber before vulcanization, which is very soft and causes the following problems. If the upper and lower cutting blades of the cutting device are not sharpened accurately and accurately, the rubber sheet will be caught in the blades during cutting, resulting in poor cutting. In particular, if a rubber member obtained by cutting a continuous rubber sheet in the width direction is a strip shape having a large aspect ratio (long and thin), the rubber sheet is easy to bite and it is extremely difficult to cut with high accuracy. is there. That is, the straightness of the upper and lower cutting blades is very important, and the cutting blade repeatedly cuts a soft rubber sheet, so that the blade tip is worn, and the blade tip is often required to be polished (maintenance). When the rubber sheet is wide and the upper and lower cutting blades are long, there is a problem that it is very difficult to polish the cutting edge so as to maintain the straightness.
[0005]
Further, when the rubber member is transported by adsorbing the upper surface of the cut rubber member, if the rubber member is particularly thin and long, the rubber member placed on the flat plate sticks to the flat plate due to its adhesiveness. Further, as shown in the cross-sectional view of FIG. 8, when the upper surface of the rubber member 41 is sucked by the suction pad 42, the rubber member 41 is lifted by the suction force of the suction pad 42 and is expanded and deformed. There is a problem in that the rubber member 41 cannot be separated from the flat plate 43 due to the negative pressure between the two. As a result, the working efficiency is lowered, and if the suction pad 42 is forcibly raised, the rubber member 41 may be cut or a hole may be opened to waste material.
[0006]
Accordingly, an object of the present invention is to provide a rubber sheet processing apparatus that can cut a soft and thin rubber sheet with high accuracy and can efficiently transport the cut rubber sheet to the next process.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, a rubber sheet processing apparatus according to the present invention includes a cutting mechanism having a cutting blade that cuts a continuous rubber sheet made of raw rubber before vulcanization in its width direction, The strip-shaped rubber mounted on the first mounting table is further provided with a mounting table mechanism having a first mounting table for mounting the strip-shaped rubber member obtained by being cut by the cutting blade of the cutting mechanism. An adsorption conveyance mechanism that adsorbs and conveys a member, and the first mounting table portion includes a first air supply path through which atmospheric air flows between the strip-shaped rubber member, and the first air supply path includes: A cross section in which the suction pad of the suction conveyance mechanism is formed at the upper surface position of the first mounting table portion corresponding to the position where the suction pad contacts the strip-shaped rubber member, and the end portion opens on the side surface of the first mounting table portion Consists of a concave groove, the mounting table mechanism is the first mounting table A second mounting table portion for mounting and storing the strip-shaped rubber member transported by the suction transport mechanism, and the second mounting table portion carries out the stored and stored strip-shaped rubber member. when it is adsorbed for, have a second air supply passage for flowing air air between said short book-like rubber member, further, the suction conveyance mechanism, said rubber sheet on said first table portion when cutting the, those that have a rubber pressing plate for holding down the leading edge of the rubber sheet between said first mounting table portion.
The second air supply path is constituted by an upper surface mounting plate having a large number of through-holes formed on one surface, and an atmosphere open space formed on the lower surface side of the upper surface mounting plate.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
[0009]
FIG. 1 is a side view showing an embodiment of a rubber sheet processing apparatus of the present invention, and FIG. 2 is a front view of a cutting mechanism 2 provided in the rubber sheet processing apparatus.
This rubber sheet processing apparatus includes a feed mechanism 13 for holding a rubber sheet roll 12 in which a continuous rubber sheet 1 is wound in a roll shape, and a pitch for feeding the rubber sheet 1 from the roll 12 to the downstream side at a predetermined pitch. A feed mechanism 14, a cutting mechanism 2 that cuts the pitch-fed rubber sheet 1 at the predetermined pitch, and a tip of the rubber sheet 1 to be cut is placed, and the cutting mechanism 2 places the rubber sheet 1. The mounting table mechanism 5 for mounting and storing the strip-shaped rubber member 10 obtained by cutting the sheet-shaped rubber member 10 and the suction conveyance mechanism 7 for transferring the cut strip-shaped rubber member 10 on the mounting table mechanism 5. Prepare. The feeding mechanism 13, the pitch feeding mechanism 14, the cutting mechanism 2, the mounting table mechanism 5, and the suction conveyance mechanism 7 are disposed on the apparatus base 24.
[0010]
As the rubber sheet 1 cut and conveyed by this apparatus, there is a raw rubber member (flexible rubber sheet) before vulcanization, and since it has adhesiveness, the rubber sheet roll 12 has the rubber sheet 1 sandwiching the release sheet 15 therebetween. It has a rolled configuration. As shown in FIG. 1, in the feeding mechanism 13, the rubber sheet 1 is fed by pitch feed, and the release sheet 15 is taken up by a take-up roll 16 included in the feeding mechanism 13.
[0011]
The feeding mechanism 13 has a brake means 33 that controls the rotation of the rubber sheet roll 12 by frictional resistance with the rubber sheet roll 12 sandwiched from both sides. Thereby, even if the pitch feed mechanism 14 operates, the roll 12 does not rotate unnecessarily due to inertia, and the rubber sheet 1 is not loosened. Further, although not shown in the drawing, the feeding mechanism 13 is provided with meandering preventing means for the rubber sheet 1.
[0012]
The cutting mechanism 2 that cuts the continuous rubber sheet 1 in its width direction is an ultrasonic wave that travels in the width direction of the rubber sheet 1 (arrow a in FIG. 2) and cuts the rubber sheet 1 as shown in FIG. A cutting blade 4 connected to the oscillator 3 is provided.
Note that the cutting in the width direction of the rubber sheet 1 by the cutting blade 4 is an oblique cutting in the width direction with an inclination angle with respect to the left and right direction, in addition to the left and right direction that is a direction orthogonal to the longitudinal direction of the rubber sheet 1. Including cases.
[0013]
The cutting blade 4 is a steel thin plate cutter, and the cutting edge may be inclined with respect to the rubber sheet surface. That is, it is good also as the cutting blade 4 in which the blade front edge toward the traveling cutting direction was formed.
The ultrasonic vibration applied to the cutting blade 4 by the ultrasonic oscillator 3 is longitudinal vibration or horizontal vibration in the ultrasonic range of 20 kHz to 60 kHz, or vibration in the direction in which the vertical and horizontal directions are combined (fine vibration). For example, the ultrasonic oscillator 3 can generate a 28 kHz ultrasonic wave to cut the rubber sheet 1 before the viscous soft vulcanization molding. The feed rate (cutting speed) in the width direction of the cutting blade 4 can be increased by using the cutting mechanism 2 as an ultrasonic cutter, and is set to 800 mm / s to 1200 mm / s.
[0014]
The cutting of the rubber sheet 1 by the cutting blade 4 of the cutting mechanism 2 is performed by feeding the rubber sheet 1 to the first mounting table portion 6 of the mounting table mechanism 5 by the pitch feed mechanism 14 shown in FIG. Further, the rubber sheet 1 is placed as a mounting shape.
As shown in FIG. 2, a groove 17 is formed in the cutting direction of the first mounting table 6, and the cutting blade 4 has a cutting edge tip inserted into the groove 17 to form the groove 17. Then, the rubber sheet 1 is cut by moving by a cutting blade driving means 18 (air cylinder or the like) which is a uniaxial actuator.
[0015]
That is, in the cutting mechanism 2, the cutting blade driving means 18 is disposed on a frame configured in a portal shape on the upstream side of the mounting table mechanism 5, and a mounting jig is connected to the driving portion of the driving means 18, so that the mounting jig A horn 19 or the like is connected to the cutting blade 4 at the tip. Note that the cutting blade 4 is detachable, and only the cutting blade 4 can be replaced, thereby reducing the equipment cost.
[0016]
The width dimension of the cutting groove 17 of the first mounting table portion 6 of the mounting table mechanism 5 is set to be twice to four times the thickness of the cutting blade 4. It is set to 1mm-2mm. If the width dimension of the concave groove 17 exceeds this upper limit value, the effect of the ultrasonic cutting action by the ultrasonically oscillating cutting blade 4 is reduced, high-speed cutting becomes difficult, and cutting accuracy also deteriorates. If the lower limit is exceeded, the cutting blade 4 may be damaged.
[0017]
Next, as shown in FIG. 1, the pitch feeding mechanism 14 intermittently feeds the rubber sheet 1 from the rubber sheet roll 12 at a predetermined pitch in the longitudinal direction thereof, and the fixed clamping means 20 in the feeding direction of the rubber sheet 1. And moving clamp means 21 are arranged in a row, and a plurality of wires (not shown) are stretched in the feeding direction of the rubber sheet 1. The fixed clamp means 20 and the movable clamp means 21 have upper and lower clamp plates that sandwich the rubber sheet 1 from above and below, respectively. The rubber sheet 1 is sent to the downstream side in the horizontal direction (mounting table mechanism 5) at a predetermined pitch by the forward movement of the moving clamp means 21 reciprocated at a predetermined pitch.
[0018]
3, 4, and 5 are a side view, a plan view, and a front view of the mounting table mechanism 5 and the suction conveyance mechanism 7. The mounting table mechanism 5 will be described with reference to the pitch feeding mechanism 14. The rubber sheet 1 disposed on the downstream side and fed by the pitch feeding mechanism 14 is placed on the first mounting table 6 provided on the upstream end side, and is first placed by the cutting blade 4 of the cutting mechanism 2. The rubber sheet 1 is cut on the mounting table 6 to obtain a strip-shaped rubber member 10. That is, it can be said that the 1st mounting base part 6 is a mounting base part for cutting.
The feed dimension by the pitch feed mechanism 14 is about 15 to 25 mm, and the short side dimension of the cut strip-shaped rubber member 10 is correspondingly 15 to 25 mm. Furthermore, the width dimension of the rubber sheet 1 is about 350 to 500 mm, and the long side dimension of the cut rubber member 10 is 350 to 500 mm.
[0019]
The first mounting table unit 6 supplies air between the upper surface (mounting surface) of the first mounting table unit 6 and the strip-shaped rubber member 10 (the lower surface thereof) on which the upper surface is adsorbed for conveyance. An air supply path 8 is provided. That is, when the first air supply path 8 sucks the upper surface of the strip-shaped rubber member 10 that is placed on the first placement table 6 by the suction conveyance mechanism 7, the rubber member 10 and the first placement table are used. This prevents the rubber member 10 from sticking to the first mounting table 6 due to a negative pressure between the first mounting table 6 and the first mounting table 6.
[0020]
The first air supply path 8 is configured to open the space between the rubber member 10 and the first mounting table 6 to the atmosphere. As shown in FIG. 4 and the side sectional view of FIG. The supply path 8 is formed at the upper surface position (vertical lower position of the suction pad 22) of the first mounting table 6 corresponding to the position where the suction pad 22 of the suction conveyance mechanism 7 contacts the rubber member 10, and the first The side surface of the mounting table 6 is constituted by a groove 23 having a concave cross section whose end is open.
[0021]
According to this configuration, even when the suction pad 22 of the suction conveyance mechanism 7 contacts the upper surface of the rubber member 10 and sucks air, the lower surface side of the rubber member 10 even if the rubber member 10 is pulled up and swells by the suction force. Since air (air) can flow in, the lower surface side of the deformed portion of the rubber member does not become negative pressure with the first mounting table 6.
A plurality of the grooves 23 may be formed according to the number of the suction pads 22 or may be formed as the grooves 23 shared with the adjacent suction pads 22.
[0022]
Next, as shown in FIGS. 3 to 5, the suction conveyance mechanism 7 includes a plurality of suction pads 22 arranged in parallel in the width direction (left-right direction) of the rubber sheet 1, and a base of the suction pads 22. A holding jig 25 that holds the end portion, and a suction pad driving means 26 that conveys the holding jig 25 along the longitudinal direction of the rubber sheet 1 at a position above the mounting table mechanism 5 are provided. The suction pad driving means 26 is a uniaxial actuator such as an air cylinder.
[0023]
The suction pads 22 are arranged corresponding to the shape of the cut strip-shaped rubber member 10, and a plurality of suction pads 22 are arranged in the longitudinal direction of the rubber member 10, that is, the width direction of the rubber sheet 1. The holding jig 25 is lowered by the raising / lowering driving means 27 so that the suction pad 22 comes into contact with the upper surface of the strip-shaped rubber member 10 placed on the first placing table portion 6 of the placing table mechanism 5 and air suction means (not shown) is shown. Thus, the rubber member 10 is sucked. Then, the rubber member 10 is adsorbed from the first mounting table 6 and transferred to the second mounting table 9 which the mounting table mechanism 5 has on the downstream side.
[0024]
A rubber pressing plate 32 is disposed in the holding jig 25 of the suction conveyance mechanism 7. When the rubber sheet 1 is cut on the first mounting table 6, the rubber pressing plate 32 is used as the rubber sheet 1. The rubber sheet is pressed by the moving clamp means 21 (or the fixed clamp means 20) of the pitch feed mechanism 14 on the upstream side of the rubber sheet 1 while holding the front edge portion of the rubber sheet 1 with the first mounting table 6. 1 is held and the rubber sheet 1 is fixed. Thereby, the rubber sheet 1 can be cut straight without being displaced.
[0025]
The second mounting table unit 9 is a wide surface mounting unit that closes half or more of the entire area of the mounting table mechanism 5 in a plan view on the downstream side of the first mounting table unit 6, and the first mounting table unit 6 is a portion where the strip-shaped rubber member 10 transported by the suction transport mechanism 7 is placed and stored. That is, the rubber members 10 cut in the first mounting table 6 are successively transferred by the suction conveyance mechanism 7, and a plurality of rubber members 10 do not overlap in order from the (downstream) end of the second mounting table 9. When a predetermined number of sheets are arranged (when full), these rubber members 10 are unloaded from the mounting table mechanism 5 by another suction / unloading mechanism (not shown). Therefore, the second mounting table portion 9 can be said to be a storage mounting table portion.
[0026]
The second mounting table unit 9 supplies air to the strip-shaped rubber member 10 when the plurality of mounted and stored rubber members 10 are adsorbed for removal from the mounting table mechanism 5. A second air supply path 11 is provided. That is, the second air supply path 11 is configured such that when the upper surface of the strip-shaped rubber member 10 that is placed on the second placement table portion 9 is sucked by the suction carry-out mechanism (not shown), the rubber member 10 and the second placement table. This prevents the rubber member 10 from sticking to the second mounting table portion 9 due to the negative pressure between the portions 9.
[0027]
The second air supply path 11 is configured to release the space between the rubber member 10 and the second mounting table 9 to the atmosphere. As shown in FIG. 4 and the side cross-sectional view of FIG. The supply path 11 is configured by an upper surface mounting plate 28 in which a large number of small through holes 29 are formed in a zigzag or lattice shape on one surface, and an air release space 30 formed on the lower surface side of the upper surface mounting plate 28. Yes. That is, the second mounting table portion 9 has a multilayer structure including the upper surface mounting plate 28, the lower layer base plate 31, and the space portion 30 therebetween. Note that the upper surface mounting plate 28 may be a punching metal or the like.
[0028]
According to this configuration, even when the suction pad of the suction / unloading mechanism (not shown) comes into contact with the upper surface of the rubber member 10 and sucks air, the lower surface side of the rubber member 10 even if the rubber member 10 is pulled up and inflated by the suction force. Since air (air) can flow into the rubber member, the lower surface of the deformed portion of the rubber member does not become negative pressure between the second mounting table 9.
Further, according to the configuration of the upper surface mounting plate 28 in which a large number of small through holes 29 are formed, even if the suction pad sucks the rubber member 10 at an arbitrary position of the upper surface mounting plate 28, the suction pad The through hole 29 (or at least a part thereof) always exists at a position below the pad surface, and the rubber member 10 can be reliably sucked and carried out to the next process. Further, this configuration can cope with a change in the size of the rubber member 10.
[0029]
Further, the configuration of the first air supply path 8 of the first mounting table 6 is similar to the second air supply path 11 in that the upper surface mounting plate 28 in which a large number of small through holes 29 are formed and the lower atmosphere release space. It may be configured to include the unit 30. Similarly to the first air supply path 8, the second air supply path 11 of the second mounting table portion 9 is configured by a groove 23 having a concave cross section whose end is open on the side surface of the second mounting table portion 9. Also good. Besides, the first and second air supply paths 8 and 11 may have a network structure or the like including a plurality of concave grooves (protrusions) formed in the plane mounting table.
[0030]
Further, the upper surfaces of the first mounting table portion 6 and the second mounting table portion 9 are coated with a fluororesin, and even when the adhesive rubber material 10 is adhered and conveyed, the rubber member 10 can be easily peeled away from the first mounting table 6 and the second mounting table 9.
With the above configuration, cutting failure, damage to the rubber member 10 at the time of conveyance can be eliminated, material loss can be reduced, and the rubber member 10 can be quickly supplied to, for example, a die molding process that is the next process. it can.
[0031]
【The invention's effect】
The present invention has the following effects by the above-described configuration.
[0032]
(According to claim 1) Even if the rubber sheet 1 is a soft and thin member such as raw rubber, it can be cut accurately and straight. Furthermore, the cutting speed can be increased and the production efficiency is improved. Furthermore, the maintenance of the cutting blade 4 becomes almost unnecessary, and a general-purpose cutter blade can be used as the cutting blade 4, so that maintenance can be performed by replacing only the cutting blade 4 which is a small part, and the equipment cost can be reduced. It becomes. Further, when the upper surface of the rubber member 10 is sucked in order to convey the strip-shaped rubber member 10 placed on the first placement table 6, even if the rubber member 10 is lifted and swollen by the suction force, the rubber member Since air can flow into the lower surface of the deformed portion, the rubber member 10 can be quickly conveyed without negative pressure between the rubber member 10 and the first mounting table 6.
Further, when the suction pad 22 of the suction conveyance mechanism 7 contacts the upper surface of the rubber member 10 and sucks air, even if the rubber member 10 is pulled up by its suction force and swells, air (air) ) Can flow in, the rubber member deformed portion lower surface side does not become negative pressure with the first mounting table 6.
Further, when the upper surface of the rubber member 10 is sucked in order to carry the strip-shaped rubber member 10 mounted on the second mounting table portion 9 from the mounting table mechanism 5 to the next process, the rubber member 10 has its suction force. The air can flow into the lower surface of the deformed portion of the rubber member even if the rubber member 10 is lifted and swelled, so that the rubber member 10 can be quickly carried out without causing negative pressure between the rubber member 10 and the second mounting table 9. Is possible.
[0033]
Further, the rubber sheet 1 can be cut straight without being displaced.
[0034]
(According to claim 2 ) Even if the suction pad sucks the rubber member 10 at an arbitrary position of the upper surface mounting plate 28, the small through hole 29 (or at least a part thereof) is located below the pad surface of the suction pad. Therefore, the rubber member 10 can be reliably sucked and carried out to the next process. Further, this configuration can cope with a change in the size of the rubber member 10.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a rubber sheet processing apparatus of the present invention.
FIG. 2 is a front view of a cutting mechanism.
FIG. 3 is a side view of the mounting table mechanism and the suction conveyance mechanism.
FIG. 4 is a plan view of a mounting table mechanism and a suction conveyance mechanism.
FIG. 5 is a front view of the mounting table mechanism and the suction conveyance mechanism.
FIG. 6 is a side sectional view showing an embodiment of an air supply path.
FIG. 7 is a side cross-sectional view showing another embodiment of the air supply path.
FIG. 8 is a side sectional view for explaining conventional suction conveyance.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rubber sheet 2 Cutting mechanism 4 Cutting blade 5 Mounting base mechanism 6 First mounting base part 7 Adsorption conveyance mechanism 8 First air supply path 9 Second mounting base part
10 Rubber material
11 Second air supply path
22 Suction pad
23 groove
28 Top plate
29 Through hole
30 Open air space
32 Rubber plate

Claims (2)

A cutting mechanism (2) having a cutting blade (4) for cutting a continuous rubber sheet (1) made of raw rubber before vulcanization in its width direction is provided, and the cutting blade ( 4) It is provided with the mounting base mechanism (5) which has the 1st mounting base part (6) which mounts the strip-shaped rubber member (10) obtained by cut | disconnecting by 4), and also in this 1st mounting base part (6) An adsorbing and conveying mechanism (7) for adsorbing and conveying the placed strip-shaped rubber member (10) is provided, and the first placing table (6) is connected to the strip-shaped rubber member (10) with atmospheric air. A first air supply path (8) for allowing
The first air supply path (8) is provided on the first mounting table (6) corresponding to the position where the suction pad (22) of the suction conveyance mechanism (7) contacts the strip rubber member (10). It is formed by a groove (23) having a concave cross section formed at the upper surface position and having an end opened on the side surface of the first mounting table (6).
The mounting table mechanism (5) is a second mounting table part for mounting and storing the strip-shaped rubber member (10) transported by the suction transport mechanism (7) from the first mounting table part (6). (9), and the second mounting table (9) includes the strip-shaped rubber member (10) when the strip-shaped rubber member (10) placed and stored is adsorbed for unloading. second air supply passage for flowing air air (11) possess between,
Furthermore, when the said suction conveyance mechanism (7) cut | disconnects the said rubber sheet (1) on the said 1st mounting base part (6), the front-end edge part of this rubber sheet (1) is this 1st mounting base. A rubber sheet processing apparatus comprising a rubber pressing plate (32) that holds and holds between the portion (6) . The second air supply path (11) includes an upper surface mounting plate (28) having a large number of small through holes (29) formed on one surface, and an open air space formed on the lower surface side of the upper surface mounting plate (28). The rubber sheet processing apparatus according to claim 1, comprising a portion (30) .

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