JPH0355289B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a tube container molding apparatus for molding tube containers by an injection molding method. (Prior Art) FIG. 11 shows a 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. This tube container 80 is used by attaching a suitable cap to the container opening 82, filling the container with paste-like contents such as toothpaste, mustard, wasabi, etc., and sealing the bottom. This tube container 80 is made by forming a container opening 82 on a tube 81 that has been formed in advance.
Formed by sticking together. Conventionally, the container opening 82 of the tube 81 has been formed exclusively by compression molding of resin. FIGS. 12 to 14 show the procedure of this conventional compression molding method. First, as shown in FIG. 12, the core 84 of the core type 83
The tube 81 is fixed by fitting the tube 81 into the tube. 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 the container opening (FIG. 13). Finally, the tube container 81 is taken out by breaking the mold (FIG. 14). The reason why the tip edge of the tube 81 is slightly bent inward is to increase the bonding force between the tube 81 and the molten resin. (Problems to be Solved by the Invention) However, the above conventional tube container manufacturing method has the following problems. That is, when compression molding is used, as described above, the molten resin is put into the open cavity (core mold) and simply compressed by the movable mold 86, so the molding pressure is inevitably low. For this reason, the pressure applied to the molten resin within the cavity tends to be uneven, and dimensional accuracy is difficult to achieve, such as so-called "shrinkage" which tends to occur in the shoulder portion of the container opening 82 and the like. Therefore, it becomes even more difficult to mold a container opening having a complicated shape. It is difficult to accurately measure the melted resin that is put into the cavity, and the molded products vary widely. Because it is difficult to accurately measure the molten resin and the mold clamping pressure is low, burrs are likely to occur on the molded product, and an extra burr finishing process is required. It is difficult to take out multiple pieces and productivity is low. By the way, in order to solve the various problems caused by the above-mentioned compression molding method, it is considered that injection molding method with high molding pressure should be used. However, in the injection molding method, the resin is filled at a higher pressure than in compression molding, so the inserted tube is pushed back and deformed by the pressure (injection pressure), resulting in a high quality tube container. The problem is that it cannot be done. Therefore, the present invention has been made to solve the above problems all at once, and its purpose is to:
To provide a tube container molding device that can perform molding without deforming the tube by injection molding and can obtain a high quality tube container. (Means for Solving the Problems) In order to solve the above problems, the present invention includes the following configuration. That is, it includes a fixed mold in which a resin flow path is formed, a core that is disposed facing the fixed mold and protrudes in the direction of the fixed mold, and is moved against the fixed mold by an appropriate contact/separation mechanism. It is equipped with a movable mold that moves toward and away from the mold, and a split mold that has a tube insertion hole into which the tip of the tube, which is the container body of the tube container that should normally be closed, is inserted, and is placed at a constant interval on an appropriate rotary table. Three or more sets of molds are arranged, each facing a through hole provided in a rotary table and held elastically by a spring, and as the rotary table is rotated, they are successively positioned between the fixed mold and the movable mold. and is rotated between the fixed mold and the movable mold, and when the movable mold approaches the fixed mold and the core enters the tube, the tip surface of the core and An intermediate mold that forms a cavity for forming a container opening with the inner surface of the split mold, and a tip inserted into the tube insertion hole of the intermediate mold to press and hold the tube between the outer surface of the core and the outer surface of the core. and a tube holding member provided on the movable mold so that the tube holding member of each intermediate mold when located between the fixed mold and the movable mold is directed toward the outer surface of the core. a biasing means for biasing; an injection device for injecting resin into the cavity through the fixed resin path; and an injection device disposed corresponding to a position for taking out the molded product, and by rotating the rotary table. The method is characterized by comprising a mold splitting mechanism for opening the split mold of the intermediate mold rotated from a position between the fixed mold and the movable mold to the take-out position. (Effect) Next, we will discuss the effect. First, the tube, which is the main container of the tube container to be obtained, is inserted into the insert stage, that is, the intermediate mold located at a position before rotation of the molding stage between the fixed mold and the movable mold. Next, the rotary table is rotated, and the intermediate mold on the insert stage is positioned on the molding stage, the intermediate mold on the molding stage is on the take-out stage, and the intermediate mold on the take-out stage is positioned and rotated on the insert stage. On the molding stage, the movable mold is approached toward the fixed mold, and is then further approached toward the fixed mold along with the intermediate mold, which is held elastically by a spring, to close and clamp the mold. The core of the movable mold then enters the tube inserted into the intermediate mold. Further, a cavity for molding the container opening is defined by the core tip surface and the intermediate mold cavity surface. Next, the biasing means provided on the fixed mold is activated, and the tube holding member provided on the intermediate mold is urged toward the outer surface of the core, and the tube is held under pressure between its tip and the outer surface of the core. Next, an injection device injects resin into the cavity through a fixed resin path to form the container opening. After molding, the tube is released from being held by the tube holding member, the mold is opened, and then the rotary table is rotated and the intermediate mold on the molding stage is moved onto the take-out stage and stopped. On the take-out stage, the intermediate mold is split by a splitting mechanism, and the tube container is taken out. This allows continuous molding of tube containers. Note that the biasing means provided on the movable mold is commonly used to bias the tube holding member of each intermediate mold that is sequentially rotated between the fixed mold and the movable mold. (Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings. [1] First, an overview of the overall device is shown in Figures 1 and 2.
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 plate located below the fixed plate 3, and is connected to the movable plate 5 by two tie bars 7a and 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 via 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. As the mold opening/closing cylinder 11 is driven, the movable plates 5, 6 and tie bars 7a, 7b move up and down, and the movable mold 4 approaches and separates from the 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 for removing the fixed mold 1 when replacing the mold. An intermediate mold 16 is arranged between the fixed mold 1 and the movable platen 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 rotating plate 18 at 120° intervals. 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 rotary plate 18; 25 is a stopper cylinder provided on the upper surface of the fixed plate; At this time, the stopper 24 moves up onto the rod of the stopper cylinder 25 to prevent the rotating plate 18 from rotating. Reference numeral 26 designates a positioning cylinder, and when the rotary plate 18 is stopped as described above, its rod enters a guide hole 27 provided in the rotary plate 18 to completely position and stop 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. 1, 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 splitting cylinder 29, which is a splitting mechanism for splitting the intermediate mold 16 into the indicated split molds, is fixed to the base 2 (FIGS. 4 and 5). That is, the wedge 30 provided at the rod end of the splitting cylinder 29 presses into the splitting mold to form the splitting mold. [2] Next, the structure of the mold will be explained based on FIGS. 6 to 9. 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 portion 33 is arranged so that when the movable mold 4 is lowered in the direction of the movable mold 1, the intermediate mold 1
6 and presses down the intermediate mold 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 main body 35, the core tip member 36, and the heat pipe holder 37 are coupled together by screwing the male threads across them. 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 3
8 is fixed to the heat pipe holder 37 by a set screw (FIGS. 8 and 9) screwed into the side 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. The cooling water descends in the cooling pipe 39 from the cooling water supply port 40, then rises in 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 that 42 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 passes obliquely upward through the core tip member 36 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. 8 and 9, 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. Then, it is urged upward by the lift spring 19 elastically mounted between the upper surface of the rotary plate 18 and the intermediate mold holding member 51, and is elastically held at a position where the upper surface contacts the head of the lift bolt 52. . This intermediate mold main body 50 is provided with vertically transparent insertion holes 53 at positions facing each of the six cores 34 of the movable mold 4, into which tubes, which are the container main bodies of the tube containers to be obtained, can be inserted. There is. In the illustrated example, a flanged cylindrical guide bush 54 is fitted into a through hole provided in the intermediate mold main 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. 55 is a nested holder, and as is clear from FIGS. 8 and 9, the intermediate mold body 5
A pair of holes are arranged on the bottom surface of the hole on the left and right sides of the insertion holes 53 provided in the row. As shown in FIGS. 6 and 7, the insert holder 55 is provided in dovetail or T-groove sliding engagement with the intermediate mold body 50 so that it can move toward and away from the intermediate mold body 50 in a direction sandwiching the insertion hole 53 therebetween. 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 . Each pair of nests 56 is
When the nest holder 55 is urged in the approach direction and the mold is clamped, a cavity surface that follows the outer shape of the mouth of the tube container is formed. The pair of nested holders 55 are normally urged toward each other by a split spring 57,
Each pair of nests 56 is mold-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 upright wall 32 of the movable mold 4 is inserted.
When the lower surface is in contact with the upper surface of the intermediate mold body 50 and the movable mold 4 is closest to the intermediate mold 16, a space formed by the cavity surface of the nest 56 and the tip surface of the core tip member 36 is This serves as the injection molding cavity for the mouth of the tube container. 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 Fixed mold 1 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. 8 and 9. Reference numeral 64 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 inserted into and protruded from the inner wall. Each tip end surface of the tube holding member 67 is provided in a semicircular arc shape, and both tip surfaces of the pair of tube holding members 67 are set to abut substantially the entire circumference of the tube. This tube holding member 67
It is preferable that the position of contact with the outer periphery of the tube be as close as possible to the cavity for molding the container mouth. 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 is normally maintained by a spring 68 elastically loaded between the enlarged portion and the side wall of the intermediate mold main body 50. The tip is biased in a direction that does not protrude into the inner wall of the insertion hole 53. Reference numeral 69 is a stopper for preventing the slipping off. The six tube holding members protruding from each side wall of the intermediate mold main body 50 are connected by connecting bars (not shown) and are slid in conjunction with each other. A tapered surface opposite to the tapered surface of the piston rod 66 of the tube holding cylinder 65 is formed in the enlarged portion of the tube holding member 67 located directly below the tube holding cylinder 65.
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, thereby causing the tip of each tube holding member 67 to The tube that protrudes from the inner wall of the insertion hole 53 from both sides and is inserted into the insertion hole 53 is held by being pinched between the core 34 and the tube. In addition, in the above, the tube holding cylinder 65
is provided on the movable mold 4, but it can also be provided on the intermediate mold main 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 Each force may be adjusted independently. [4] Next, the molding operation procedure will be explained. (1) A tube (laminate 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. 2 and 10). (2) The index motor 22 is operated to rotate the rotary plate 18, and the intermediate mold 16 on the insert stage Y is positioned on the forming 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) Mold Clamping 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 are lowered together with the tie bar 7. One mold clamping cylinder 13
Oil is sucked in from 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 holder 46.
The lower end of the tube 70 enters along the cavity surface of the nest (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 holder 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. 9). ). (4) The tube holding cylinder 65 is operated, 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 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 from the undercut part of the runner to form the intermediate mold 16.
(Nest 56) and rises. Then, the intermediate mold holding member 50 of the intermediate mold 16
comes into contact with the lift bolt 52, the intermediate mold 1
Since 6 does not rise any further, only movable type 4 continues to rise. At this time, the tube 70 and the container mouth (molded part) remain attached to the container 16 due to the undercut of the threaded portion of the container mouth. On the other hand, since the runner branch directly rises to the core 34, the runner branch is cut from the inner wall of the container mouth (molding part) at the small diameter gate part, and the gate part passes through the gate hole 44 and remains. After that, open the mold to the mold opening completion position to complete the mold opening (6th
figure). (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 5). The resulting tube container is taken out upwards and the runner branch downwards using 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 rotary plate 18 in this manner, tube containers can be continuously formed. In the above embodiment, three sets of intermediate molds 16 were provided, but four or more sets may be provided. (Effects of the Invention) As described above, according to the present invention, since the tube is held by being pinched between the tube holding member and the outer surface of the core, the tube will not come out or be deformed even by high resin injection pressure. do not have. Therefore, an injection molding method using a high molding pressure can be employed, and the various problems mentioned above caused by the conventional compression molding method can be solved, and a high quality tube container with good dimensional accuracy can be efficiently provided. In addition, by adopting a rotary system in which multiple sets of intermediate molds are installed on a rotary table, production efficiency is greatly improved, and it is only necessary to provide one set of fixed molds and a movable mold for multiple sets of intermediate molds. , the entire device can be simplified. Furthermore, since the biasing means for driving the tube holding member provided on each intermediate mold is also provided in the movable mold, one set of biasing means is sufficient for a plurality of intermediate molds, and the apparatus can also be simplified. Furthermore,
According to this device, by inserting the tube into the closed intermediate mold, the tube will not be pinched between the split molds and damaged.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the tube container manufacturing apparatus according to the present invention, Fig. 2 is a front view with only the main parts cut away, and Fig. 3 shows the opening/closing of the mold and the mold clamping mechanism. 4 is a front view showing the mold splitting mechanism of the intermediate mold, FIG. 5 is a side view thereof, FIG. 6 is a front sectional view of the mold with the mold opened after molding, and Figure 4 is a front view of the mold with the mold closed. FIG. 8 is a side sectional view of the mold with the mold opened after molding, and FIG. 9 is a side sectional view of the mold with the mold closed. Fig. 10 is an explanatory diagram showing the state in which the tube is inserted into the intermediate mold on the insert stage, Fig. 11
The figure is a sectional view of the tube container to be obtained, Fig. 12~
FIG. 14 is an explanatory cross-sectional view showing a conventional tube container forming process. 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.

Claims (1)

[Scope of Claims] 1. A fixed mold in which a resin flow path is formed, and a core disposed facing the fixed mold and protruding in the direction of the fixed mold. It is equipped with a movable mold that moves toward and away from the fixed mold, and a split mold that has a tube insertion hole into which the tip of the tube, which is the container body of the tube container that is normally closed, can be inserted, and an appropriate rotary table. Three or more sets are arranged at regular intervals above, each facing a through hole provided in a rotary table and held elastically by a spring, and as the rotary table is rotated, the fixed mold and movable one after another are arranged. The core is positioned and rotated between the mold and the fixed mold and the movable mold, and the movable mold approaches the fixed mold so that the core enters the tube. At this time, an intermediate mold is provided that forms a cavity for forming a container opening with the core tip surface and the inner surface of the split mold, and an intermediate mold is provided on each of the intermediate molds to press and hold the tube between the outer surface of the core. a tube holding member whose tip is protrusively inserted into the tube insertion hole of the movable mold, and the tube holding member of each intermediate mold when located between the fixed mold and the movable mold is attached to the core. a biasing means for biasing toward the outer surface; an injection device for injecting resin into the cavity through the fixed resin path; Molding of a tube container characterized by comprising a mold splitting mechanism that opens the split mold of the intermediate mold rotated from a position between the fixed mold and the movable mold to the take-out position when the mold is rotated. Device.