JPH042413B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a tube container and an apparatus for manufacturing the same. (Background Art) FIG. 12 shows a cross-sectional view of a tube container 80 to be obtained. The tube container 80 is constructed by molding and fixing a container opening 82 with resin to the end of a tube 81 made of a laminated sheet of metal foil and synthetic resin. Conventionally, the container opening 82 was formed in the tube 81 solely by compression molding of resin. That is, first, as shown in FIG. 13, the core mold 83 is
The tube is fitted into the core 84 and the tube 81 is fixed. Next, the split mold 85 is closed, the tip edge of the tube 81 is slightly bent inward, and molten resin is poured into the cavity within the split mold 85 and compressed by the movable mold 86 to form a container opening (FIG. 14). Finally, the mold is broken and the tube container is taken out (Figure 15). However, when such compression molding is used, it is difficult to mold a large number of pieces, and because the molding pressure is low, shrinkage occurs in the shoulder part of the container mouth, making it difficult to mold products with complex shapes. There are problems in that burrs are likely to occur and extra finishing steps are required. Therefore, the inventors came up with the idea that the above-mentioned problems could be solved by molding the container opening by an injection molding method. However, when using the injection molding method, molten resin is injected through a narrow resin path into the mold cavity, so runner branches inevitably adhere to the molded product, and when the runner branches are finally cut, Cut marks from the runner branches remain on the molding. For example, if molten resin is injected from a portion corresponding to the end face of the container mouth as shown in Figure 16, cut marks on the runner branches will remain on the end face, which will not only cause liquid leakage when capped. , the appearance is also bad. In addition, when molten resin is injected from the outer diameter of the container mouth as shown in Fig. 17, runner branch cut marks remain in the area, which obstructs cap fitting.
It is also unfavorable in terms of appearance. Furthermore, when injection is performed from the shoulder at the mouth of the container as shown in Fig. 18, cut marks on the runner branches are visible from the outside even when capped, which is undesirable in appearance and reduces the product value. . In any of the above cases, when the product is finally manufactured, a cutting process of the runner branches is essential, which increases the number of man-hours. Therefore, the present invention has been made to solve the above problems all at once, and its purpose is to provide a tube container that allows the cap to be tightly fitted, has no risk of liquid leakage, and has an excellent appearance. It is on offer. Another object of the present invention is to provide a mold for forming a tube container in which the runner branches can be cut at the same time as the mold is divided. (Summary of the Invention) In order to solve the above problems, the present invention has the following configuration. That is, the present invention provides a tube container in which a molten resin is injected through a gate hole provided with a core-shaped core in the cavity to form a container opening at one end of the tube, and the inner surface of the container opening. , a tube container characterized in that a pin-pont gate from the gate hole is provided on a sliding surface on which the outer circumferential surface of the core slides when the core is pulled out. The present invention also provides a core type having a core that regulates the inner shape of the tube container to be obtained at least on the container mouth side including the contents outlet, and a core of the core type that enters through the tube which is the container body. In a mold for forming a tube container, the inner surface of the split mold and the end surface of the core define a cavity for molding a container opening, which one end side of the tube faces. A gate hole is provided in the small diameter part that regulates the inner surface of the contents ejection cylinder of the container mouth formed in the container opening so as to intersect with the direction in which the core is extracted from the split mold, and one end of the gate hole is used for injection from the injection device. It is also a molding tool for a tube container, characterized in that the opening is opened so as to connect to the resin path of the resin to be processed, and the other end is opened as a pinpoint gate on the side surface of the inner surface of the cavity forming the contents removal tube. . (Function) Next, the function of the tube container molding die will be described. The core mold and the split mold are closed so that the tube is interposed between the core and the split mold. At that time, the tube may be fitted into the core and then the tube and core may be inserted into a split mold to close the mold, or the tip of the tube may be inserted into the split mold and then inserted into the tube. The mold may be closed by entering the core. By closing the mold, the inner surface of the split mold and the end surface of the core define a cavity for molding the container opening.
One end of the tube faces into the cavity.
Here, molten resin is injected into the cavity from the injection device through the resin path and the gate hole. When the core is extracted from the split mold after being cooled and solidified, the molded product remains on the split mold side due to the undercut at the mouth of the container. At this time, since the gate hole is provided through the small diameter portion of the core, the runner branch is automatically cut when the core comes out of the molded product. A tube container is obtained by opening the mold. After the runner branches are cut, they remain on the inner surface of the container mouth. (Embodiments) Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows a cross-sectional view of a tube container 90 according to the present invention. 91 is a tube container main body having a cylindrical shape. Reference numeral 92 is a container opening, and a tube container main body 91
It is molded and fixed on one end of the. The contents removal tube 93 of the container opening 92 may have any shape, including one having a male threaded portion for screwing a cap (not shown) or a fitting portion (not shown) for fitting the cap. A feature of the present invention is that a pinpoint gate 95 for a runner branch 94 is provided on the inner surface of the container mouth 92. Therefore, the cut marks of the runner branches 94 remain inside the container opening 92, so that they do not interfere with the screwing or fitting of the caps, and the caps are attached tightly, so there is no risk of liquid leakage. Also, the appearance is good because the cut marks on the runner branches are not visible from the outside. The tube container body 91 is made of PE, paper, PE, Al,
Laminated tube made of PE, PE, EVA,
Multi-layer extruded tubes made of PE, tubes made of single PE or PP, etc. are widely available. The material of the container opening 92 can also be selected as appropriate, such as PE or EVA resin. Next, the mold for forming the tube container 90 will be described in detail together with the tube container manufacturing apparatus. [1] First, an overview of the overall device is shown in Figures 2 and 3.
This will be explained based on the diagram and FIG. 1 is a fixed type, and is fixed to the upper surface of a fixed platen 3 fixed to a base 2. 4 is a movable type, and the fixed type 1 is placed above the fixed type 1.
It is fixed to the lower surface of the movable platen 5, facing the same. 6 is also a movable platen, located below the fixed platen 3, and connected to the movable platen 5 by two tie bars 7a, 7b. 8 is a nut for tightening the same. The tie bars 7a and 7b are guided through a through hole 9 provided in the fixed platen 3 through a tie bar bush 10 so as to be slidable in the vertical direction. Furthermore, a mold closing cylinder 11 is fixed to the lower surface of the fixed platen 3, and its piston rod 12 is connected to the movable platen 6.
is connected to. However, mold opening/closing cylinder 1
1 is driven, movable plates 5, 6 and tie bars 7a, 7b are raised and lowered, and movable mold 4 approaches and separates in the direction of fixed mold 1. In addition, the fixed platen 3 has two mold clamping cylinders 13,
14 is provided, and the mold clamping cylinder 13,
Mold clamping rams 13a and 14a protruding from the upper surface of the movable platen 6 are inserted into the movable platen 14. Furthermore, in the fixed platen part below the fixed mold 1, a through hole provided in the fixed platen 3 is inserted into the piston rod 15a.
Lift cylinders 15, 15, which are raised and lowered, are fixed. This lift cylinder 15 is used to remove the fixed mold 1 when replacing the mold. An intermediate mold 16 is arranged between the fixed mold 1 and the movable mold 4. The intermediate mold 16 is resiliently held upward by a lift spring 19 on a rotary plate 18 which is a rotary table that rotates around a shaft 17 provided on the fixed platen 3. Also, intermediate type 16
comes into contact with and separates from the stationary mold 1 through a through hole 20 formed in the rotary plate 18. Three sets of intermediate molds 16 having the same structure are arranged on a rotary disk 18 at intervals of 120 degrees. The rotary plate 18 is rotated by the output gear 23 of the index motor 22 meshing with an internal gear 21 fixed to the lower part of the rotary plate 18. The three sets of intermediate molds 16 are sequentially sent between the fixed mold 1 and the movable mold 4 by rotating the rotary plate 18. 24 is a stopper provided on the lower surface of the rotating plate 18, 25 is a stopper cylinder provided on the upper surface of the fixed plate 3, and the intermediate mold 16 on the rotating plate 18 is rotated between the fixed mold 1 and the movable mold 4. When positioned, the stopper 24 engages with the rod of the stopper cylinder 25 to prevent rotation of the rotary plate 18. Further, 26 is a positioning cylinder, and the rotary plate 18
When the rotary plate 18 is stopped as described above, the rod enters the guide hole 27 provided in the rotary plate 18, completely positions the rotary plate 18, and stops the rotary plate 18. By retracting the rods of the stopper cylinder 25 and the positioning cylinder 26, the rotating plate 18 starts rotating again. One set each of the above-mentioned stopper cylinder 25 and positioning cylinder 26 is provided, and three stoppers 24 and three guide holes 27 are provided corresponding to each intermediate mold. Reference numeral 28 denotes a known in-line screw type injection device, which is provided so as to be movable forward and backward toward a hot runner block nozzle opening, which will be described later, of the fixed mold 1. In addition, in FIG. 2, the intermediate mold 16 is the fixed mold 1.
The X position located between the mold 4 and the movable mold 4 is the molding stage, the Y position in front of it is the tube insert stage, and the rear Z position is the take-out stage. At the lower corresponding position of the take-out stage Z,
A mold dividing cylinder 29, which is a mold dividing mechanism for dividing the intermediate mold 16 into split molds (to be described later), is fixed to the base 2 (FIGS. 5 and 6). In other words, the wedge 30 provided at the rod end of the splitting cylinder 29 bites into the split mold and splits the mold. [2] Next, see Figures 7 to 10 regarding the configuration of the mold.
This will be explained based on the diagram. a Movable type 4 The movable type 4 has a mounting plate part 31 to the movable platen 5,
A regulation board part 33 is integrally fixed to the mounting board part 31 and has an upright wall 32 extending in one direction of the fixed mold on the periphery;
It consists of six cores 34 that penetrate through and protrude downward. The lower surface of the upright wall 32 of the regulation plate part 33 is arranged so that when the movable mold 4 is lowered in the direction of the fixed mold 1, the intermediate mold 1
6 and presses down the intermediate wall 16 against the biasing force of the lift spring 19 as the movable mold 4 descends. The six cores 34 are arranged on a straight line at equal intervals, and their tips protrude below the lower surface of the upright wall 32. The core body 35 is formed into a cylindrical shape, and a core tip member 36 that forms the inner surface shape of the mouth of the tube container is fixed to the lower part of the core body 35. The core body 35 and the core tip member 36 are connected to each other by screwing together a heat pipe holder 37 with its male thread extending over both. A heat pipe 38 is inserted into the heat pipe holder 37 and has a lower end extending into the core tip member 36 and an upper end extending into the hollow portion of the core body 35 . The heat pipe 38 is fixed to the heat pipe holder 37 by a set screw (FIGS. 9 and 10) screwed into the side surface of the heat pipe holder 37. A cooling pipe 39 is inserted and fixed into the hollow portion of the core body 35 . The upper part of the heat pipe 38 enters the lower part of the cooling pipe 39 in an overlapping manner.
Cooling water is supplied from the cooling water supply port 40 to the cooling pipe 3
9 , then rises within the gap between the outer wall of the cooling pipe 39 and the inner wall of the core body 35 and is discharged from the cooling water outlet 41 . Note 4
2 and 43 are seal rings. The tip of the core tip member 36 is formed to have a smaller diameter. Reference numeral 44 denotes a gate hole, which penetrates the core tip member 36 obliquely upward from the stepped portion of the small diameter portion of the core tip member 36 and opens to a small diameter on the opposite wall surface. Reference numeral 45 denotes a tube presser holder fixed to the regulation plate portion 33. As shown in FIGS. 9 and 10, this tube presser holder 45 includes a tube presser 46 whose tip end elastically contacts the upper outer surface of each core 34 from both sides of the core 34.
are provided in pairs for each core 34. The tube presser 46 is formed of a leaf spring, and the elastic force applied to the outer surface of the core 34 can be adjusted using an adjustment screw 47. b. The intermediate mold 16 50 is an intermediate mold main body, and is guided so as to be movable in the vertical direction by a lift bolt 52 inserted through an intermediate mold holding member 51. The lift spring 19 elastically mounted between the upper surface of the rotary plate 18 and the intermediate mold holding member 51 urges upward, and the upper surface is pressed against the lift bolt 52.
It is held in a position where it comes into contact with the head of the person. This intermediate mold main body 50 has an insertion hole 53 vertically provided in a position facing each of the six cores 34 of the movable mold 4 into which a tube serving as a container main body of a tube container to be obtained can be inserted. There is. In the illustrated example, a cylindrical guide bushing 54 with a through-hole flange provided in the intermediate mold main body 50 is fitted into the intermediate mold body 50 to form an insertion hole. The guide bush 54 is not necessarily necessary, and the through hole provided in the intermediate mold body 50 may be used as the insertion hole. The upper part of the insertion hole 53 is preferably slightly enlarged in diameter to facilitate insertion of the tube. Numeral 55 denotes nested holders, and as is clear from FIGS. 9 and 10, a pair of nested holders are arranged on the lower surface of the intermediate mold main body 50 on both sides of the insertion holes 53 provided in a row. As shown in FIGS. 7 and 8, the insert holder 55 is fitted with the intermediate mold body 50 in a dovetail groove or T-shape.
The grooves are provided so as to be movable toward and away from each other in the direction of sliding into the insertion hole 53 and sandwiching the insertion hole 53. Numeral 56 is a nest having a split structure, and is held in pairs at positions corresponding to the lower part of each insertion hole 53 and facing the nest holder 55 . and each pair of nests 53
forms a cavity surface that follows the outer shape of the mouth of the tube container when the nest holder 55 is urged in the approach direction and the mold is clamped. The pair of nest holders 55 are normally urged toward each other by a split spring 57, and each pair of nests 56 is clamped. Then, as described later, the tube is inserted into the insertion hole 53, the movable mold 4 is lowered, the core 34 enters the tube, and the lower surface of the upright wall 32 of the movable mold 4 comes into contact with the upper surface of the intermediate mold main body 50,
When the movable mold 4 comes closest to the intermediate mold 16, the space formed by the cavity surface of the nest 56 and the tip surface of the core tip member 36 forms the injection molding cavity of the container opening of the tube container. becomes. A resin path 58 is cut into the lower surface of the nest 56 and communicates with the cavity through the gate hole 44 provided in the core tip member 36 . Although not shown, a suitable cooling water passage is formed in the nest 56. Further, the nest 56 is removably fixed to the nest holder 55, and by replacing the nest 56, container openings of various shapes can be formed. c. The fixed mold 1 consists of a fixed mold main body 59 attached to the upper surface of the fixed platen 3, and a hot runner block 61 installed inside the fixed mold main body 59 via a heat insulating material 60. The hot runner block 61 has a sprue bush 49 that opens on the side wall of the fixed main body 59.
A resin path 62 communicating with this sprue bush 49 is formed. Further, the fixed body 59 has the nest 56
A resin path 63 connecting the resin path 58 provided on the lower surface and a resin path 62 in the hot runner block 61 is formed, and a recess 64 into which the core tip of the movable mold 4 can fit is formed. [3] Next, the tube holding mechanism will be explained based on FIGS. 9 and 10. Reference numeral 65 designates tube holding cylinders, one of which is disposed at each of the four corners of the regulating plate portion 33 of the movable mold 4. The tip of the piston rod 66 of the tube holding cylinder 65 is formed into a tapered surface. Reference numeral 67 denotes a pair of tube holding members, whose tips are connected to through holes provided toward the insertion holes 53 from both side walls of the intermediate mold main body 50, respectively.
It is slidably protruded into and out of the inner wall. Each pair of tube holding members 67 is provided for each insertion hole 53, respectively. In addition, each tube holding member 67 has a portion protruding from the side wall of the intermediate mold main body 50 formed as an enlarged portion, and a spring 68 elastically loaded between this enlarged portion and the side wall of the intermediate mold main body 50 normally holds the tip. is biased in a direction that prevents it from protruding into the inner wall of the insertion hole 53. Reference numeral 69 is a stopper for preventing it from coming off. Intermediate body 50
The six tube holding members protruding from each side wall of the tube are connected by a connecting bar (not shown) and slid in conjunction with each other. A tube holding member 6 located directly below the tube holding cylinder 65
The enlarged portion of the tube 7 has a tapered surface that faces the tapered surface of the piston rod 66 of the tube holding cylinder 65. However, as the piston rod 65 is lowered, its tapered surface presses the tapered surface of the tube holding member 67 against the biasing force of the spring 68, so that the tip of each tube holding member 67 is inserted. An insertion hole 53 protrudes from both sides of the inner wall of the hole 53.
The tube inserted therein is clamped and held between the core 34 and the core 34. In addition, in the above case, the tube holding cylinder 6
5 is provided on the movable mold 4, but it can also be provided on the intermediate body 50. Although not shown, the tube may be held by an iron core energized by an electromagnetic solenoid. Furthermore, a tube holding cylinder 65 for driving the tube holding member 67 may be provided for each tube holding member 67, and in this case, the biasing force of each tube holding cylinder 65 may be adjusted so that each tube holding cylinder 65 is The forces may be adjusted independently. [4] Next, the molding operation procedure will be explained. (1) A tube (laminated tube) 70 formed of a laminated sheet of metal foil and synthetic resin is inserted into the insertion hole 53 of the intermediate mold 16 on the insert stage Y (see FIGS. 3 and 11). (2) The index motor 22 is operated to rotate the rotary plate 18, and the intermediate mold 16 placed on the insert stage Y is positioned on the molding stage X as described above and stopped. Since the next intermediate mold 16 is positioned on the insert stage Y, the tube 70 is inserted in the same manner. (3) Pressure oil is supplied to the upper oil chamber of the mold opening/closing cylinder 11, and the movable plates 5, 6 and the movable mold 4 descend together with the tie bar 7. One mold clamping cylinder 13
Oil is sucked in through a pre-fill valve (not shown). The movable mold 4 descends and its core 34 enters the tube 70, and at the same time the tube 70 is pushed downward by the tube presser 46.
The lower end of the tube 70 enters along the cavity surface of the insert (split mold) 56 and is bent slightly inward. After that, when the movable mold 4 further descends, the tube 70 no longer enters, and the tube presser 46 climbs over the tube 70 and descends. When the lower surface of the standing wall 32 of the movable mold 4 comes into contact with the upper surface of the intermediate mold main body 50, the lift spring 19 is compressed, and the intermediate mold 16 also descends together with the movable mold 4 and comes into contact with the fixed mold 1 (Fig. 10). . (4) The tube holding cylinder 65 is actuated, and its piston rod 66 is lowered to push the tube holding member 67 with its tapered surface, and the tube 70 is held under clamping pressure between the pair of tube holding members 67 and the core 34. be done. (5) Pressure oil is supplied to the mold clamping cylinder 13, and the mold is strongly clamped. (6) The injection device 28 moves forward and comes into contact with the fixed mold 1, and the molten resin is injected. The molten resin is filled into the cavity through the resin path 62 of the hot runner block 61, the resin path 63 of the fixed mold, the resin path 58 of the intermediate mold 16, and the gate hole 44, and is cooled. That is, the cooling water supplied from the cooling water supply port 40 descends within the cooling pipe 39, rises within the core body 35, and is discharged from the cooling water discharge port 41, but also flows through the core tip member 36 via the heat pipe 38. cooled down. Also nested 56
It is also cooled by cooling water flowing through a cooling pipe (not shown). After cooling is completed, remove the tube holding cylinder 6.
The piston rod 66 of No. 5 is raised, the tube holding member 67 is moved back and returned by the spring 68, and the holding of the tube 70 is released. (7) Mold opening The supply of pressure oil to the mold clamping cylinder 13 is stopped, pressure oil is supplied to the lower oil chamber of the mold opening/closing cylinder 11, and the mold is opened. First, intermediate type 16
and the fixed mold 1 are opened, and the runner branch is held by the undercut part of the runner to form the intermediate mold 1.
6 (nest 56) and rises. Then, the intermediate mold holding member 50 of the intermediate mold 16
When the intermediate mold 16 comes into contact with the head of the lift bolt 52, the intermediate mold 16 does not rise any further, so only the movable mold 4 continues to rise. At this time, the tube 70 and the container mouth (molding part) remain attached to the intermediate mold 16 due to the undercut of the threaded portion of the container mouth. On the other hand, since the core 34 continues to rise, the runner branch is cut from the inner wall of the container mouth (molded part) at the small diameter gate part, and the gate part passes through the gate hole 44 and remains. Thereafter, the mold is opened to the mold opening completion position to complete mold opening (FIG. 7). (8) The rotation plate 18 is no longer stopped by the stopper cylinder 35 and the positioning cylinder 26,
The intermediate mold 16 placed on the molding stage X is moved onto the take-out stage Z and stopped at this position. Here, the mold splitting cylinder 29 is actuated, and the wedge 30 at the rod end enters between the split molds (a pair of nests), and the split molds (a pair of nests) are pushed open against the split mold spring 57 (the first wedge). Figure 6). The resulting tube container is taken out upward and the runner branch is taken out downward by a suitable robot device or the like. The intermediate mold 16 moved onto the molding stage X is similarly subjected to mold clamping and injection. By sequentially rotating the rotating plate 18 in this manner, tube containers can be continuously formed. In the above embodiment, three sets of intermediate molds 16 are provided, but four or more sets may be provided. Further, in the above embodiment, the tube 70 is first inserted into the intermediate mold 16, and then the core 34 is inserted into the tube 70. may be lowered to enter the intermediate mold 16. Furthermore, the molding die according to the present invention can be applied not only to the rotary type device as described above but also to any type of sliding type or single acting type device. (Effects of the Invention) As described above, according to the tube container of the present invention, the cutting marks (pinpoint gates) of the runner branches are located on the inner surface of the container opening, so they do not interfere with the fitting of the cap, and the contents After filling, it is not visible from the outside, so it has an excellent appearance. Furthermore, according to the mold for forming a tube container according to the present invention, since the gate hole is provided to penetrate through the small diameter portion of the core, the runner branches are automatically cut from the molded product when the core is extracted from the split mold. This eliminates the need for cutting the runner branches.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of a tube container according to the present invention. Fig. 2 is a plan view showing one embodiment of a tube container manufacturing device, Fig. 3 is a front view with only the main parts cut away, Fig. 4 is a sectional view showing the opening/closing of the mold and the mold clamping mechanism; Figure 5 is a front view showing the mold splitting mechanism of the intermediate mold, Figure 6 is a side view thereof, Figure 7 is a front cross-sectional view of the mold with the mold opened after molding, and Figure 8 is the mold closed and resin released. Fig. 9 is a side view of the mold with the mold open after molding, Fig. 10 is a side sectional view of the mold with the mold closed, and Fig. 11 is a front sectional view of the mold in a state where injection is being performed. Explanatory diagram showing the tube being inserted into the intermediate mold on the insert stage, 1st
Figure 2 is a sectional view of the tube container, Figures 13 to 15
The figure is an explanatory cross-sectional view showing a conventional tube container manufacturing process. Further, FIGS. 16 to 18 are explanatory diagrams showing examples of pinpoint gate setting locations, respectively. 1...Fixed type, 2...Base, 3...Fixed plate, 4
...Movable type, 5, 6...Movable plate, 7a, 7b...
Tie bar, 8... tightening nut, 9... through hole,
10... Tie bar bush, 11... Mold opening/closing cylinder, 12... Piston rod, 13, 14...
Clamping cylinder, 13a, 14a... Clamping ram, 1
5a... Piston rod, 15... Lift cylinder, 16... Intermediate mold, 17... Shaft, 18... Rotating plate, 19... Lift spring, 20... Through hole,
21... Internal gear, 22... Index motor,
23... Gear, 24... Stopper, 25... Stopper cylinder, 26... Positioning cylinder, 27
... Guide hole, 28 ... Injection device, 29 ... Mold division cylinder, 30 ... Wedge, 31 ... Mounting board section,
32... Standing wall, 33... Regulating panel section, 34... Core, 35... Core body, 36... Core tip member,
37... Pipe holder, 38... Heat pipe, 39... Cooling pipe, 40... Water supply port, 41
...Discharge port, 42, 43...Seal ring, 44
...Gate hole, 45...Tube presser holder,
46...Tube holder, 47...Adjustment screw, 50
...Intermediate mold body, 51...Intermediate mold holding member, 52
... Lift bolt, 53 ... Insertion hole, 54 ... Guide bush, 55 ... Nested holder, 56 ...
...Nest, 57...Split spring, 58...Resin path, 59...Fixed body, 60...Insulating material, 6
1... Hot runner block, 62, 63...
Resin path, 64... recess, 65... tube holding cylinder, 66... piston rod, 67... tube holding member, 68... spring, 69... stopper, 70... tube (laminate tube), X... molding Stage, Y... Insert stage, Z... Takeout stage, 80... Tube container, 81... Tube, 82... Container mouth, 83... Core mold, 84... Core, 85... Split mold, 86 ...Movable type, 90...Tube container, 9
1... Tube container body, 92... Container mouth, 9
3...Contents removal tube, 94...Runner branch, 95...
...Pinboint Gate.

Claims (1)

[Scope of Claims] 1. A tube container in which a molten resin is injected through a gate hole provided with a core-shaped core in the cavity to form a container opening at one end of the tube, wherein: A tube container characterized in that a pin-pont gate from the gate hole is provided on a sliding surface on which the outer circumferential surface of the core slides when the core is pulled out. 2. A core mold having a core that regulates the inner shape of at least the container mouth side including the contents outlet of the tube container to be obtained, and a split mold into which the core of the core mold can enter through the tube that is the main body of the container. in a mold for forming a tube container, in which the inner surface of the split mold and the end surface of the core define a cavity for molding a container opening, which one end side of the tube faces; A gate hole is provided in the small diameter portion that regulates the inner surface of the contents removal cylinder at the container mouth so as to intersect with the direction in which the core is extracted from the split mold, and one end of the gate hole is connected to the resin injected from the injection device. A mold for forming a tube container, characterized in that the mold is opened to be connected to a resin path, and the other end is opened as a pinpoint gate on the side surface of the inner surface of a cavity forming a contents removal tube.