Balloon blow molding equipment

Abstract

The invention provides balloon blow molding equipment which comprises a main machine, a clamping structure and an inflation structure are connected to the main machine in a sliding mode, a fixing box is fixedly connected to the main machine and located between the clamping structure and the inflation structure, and a mold cavity used for containing a mold is formed in the fixing box. A heating plate for heating a mold and a cooling plate for cooling the mold are arranged in the fixed box, a communicating hole facing the mold is formed in the cooling plate, a communicating pipe for injecting cooling gas is connected to the cooling plate, and the communicating pipe is communicated with the communicating hole, so that the purpose of improving the production efficiency is achieved.

Description

Technical Field

[0001] The invention relates to a balloon blow molding device. Background Art

[0002] At present, a Chinese patent with authorization announcement number CN222061182U discloses a balloon forming machine, including a workbench and a clamping and inflating mechanism arranged on the top of the workbench, a mold is horizontally arranged on one side of the clamping and inflating mechanism, and a mold cavity is formed inside the mold, and the mold cavity horizontally penetrates the mold, and a plurality of heating blocks are also arranged inside the mold, and the heating blocks are used to heat the mold, thereby performing regional heating on the catheter passing through the mold cavity, a first guide rail is horizontally arranged on one side of the mold, and a first moving platform is driven on the first guide rail, and the first moving platform moves horizontally on the top of the workbench through the first guide rail, the clamping and inflating mechanism includes a clamping cylinder, and an air outlet is connected to the pipeline on the clamping cylinder, and one end of the air outlet is connected to the catheter pipeline, so that when the clamping cylinder clamps the catheter, the air outlet conveys inert gas into the catheter, and the inert gas expands the catheter that has been regionally heated, so that the outer wall of the catheter is close to the inner wall of the mold cavity, and finally a balloon is formed.

[0003] However, after the catheter is formed into a balloon by this balloon forming machine, it is necessary to wait for natural cooling before the catheter can be taken out of the mold, so it is inconvenient to use and affects production efficiency. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a balloon blow molding device to achieve the purpose of improving production efficiency.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a balloon blow molding equipment, including a main machine, a clamping structure and an inflation structure are slidably connected to the main machine, a fixed box is fixedly connected to the main machine, the fixed box is located between the clamping structure and the inflation structure, a mold cavity for placing the mold is opened on the fixed box, a heating plate for heating the mold and a cooling plate for cooling the mold are arranged in the fixed box, a connecting hole facing the mold is opened on the cooling plate, a connecting pipe for injecting cooling gas is connected to the cooling plate, and the connecting pipe is connected to the connecting hole.

[0006] To implement the above technical solution, a cylindrical mold is placed in a mold cavity, one end of the catheter is fixed by a clamping structure, the other end of the catheter is connected to the inflatable structure, and both the clamping structure and the inflatable structure are moved away from the fixed box to stretch the catheter and thin the inner wall of the catheter in the mold. The heating plate then heats the mold, and the mold heats the catheter. At the same time, the inflatable structure injects nitrogen into the catheter to obtain a balloon in the mold. After the balloon is formed, cooling air is injected into the cooling plate through a connecting pipe, and then blown onto the mold from the connecting hole to achieve a rapid cooling effect, so that the catheter can be taken out of the mold after the mold is taken out of the fixed box, thereby achieving the purpose of improving production efficiency.

[0007] As a preferred solution of the present invention, the clamping structure includes a first slide and a first clamp. The first slide is slidably connected to the main machine. The two first clamps are arranged opposite to each other and driven by a cylinder to clamp the catheter.

[0008] To implement the above technical solution, one end of the catheter is placed between the two first clamps, and the two first clamps are moved toward each other so that the two first clamps clamp the catheter to prevent air leakage, and the first slide is moved away from the fixed box to stretch the catheter.

[0009] As a preferred embodiment of the present invention, the inflation structure includes a second slide, a second chuck, a hard tube and an inflation pump, the second slide is slidably connected to the main machine, two second chucks are slidably connected to the second slide and are used to clamp the catheter, the hard tube is placed in the catheter and fixed by the second chuck, and the inflation pump is fixed on the second slide.

[0010] To implement the above technical solution, the end of the catheter away from the first chuck is placed between the two second chucks, the hard tube is placed in the catheter, the two second chucks are brought close to each other, so that the two second chucks clamp the catheter, and at the same time, the catheter clamps the hard tube, and then the end of the catheter is connected to the inflation pump; in the process of the first slide moving away from the fixed box, the second slide also moves away from the fixed box, so that the second chuck pulls up the catheter, and the inflation pump is turned on to inject nitrogen from the hard tube into the catheter, so that the middle part of the catheter bulges with the cooperation of the heating plate and fits with the inner wall of the cavity of the mold to obtain the balloon.

[0011] As a preferred solution of the present invention, two relatively arranged heating plates are arranged in the fixed box, and the heating plates are slidably connected in the fixed box. The second slide moves away from the fixed box and the two heating plates are synchronously moved toward the direction close to the mold through the conduction component.

[0012] To implement the above technical solution, when the second slide moves away from the fixed box, the heating plate is moved toward the mold through the conduction component, so as to improve the heating efficiency of the mold and reduce the production cost.

[0013] As a preferred embodiment of the present invention, the transmission component includes a rack, a gear, a transmission shaft, a first threaded segment, a second threaded segment, a first screw sleeve, a second screw sleeve, and an optical axis. The rack is fixed on the second slide seat, and the transmission shaft is rotatably connected to the fixed box. The first threaded segment and the second threaded segment are respectively fixed on both ends of the transmission shaft and are coaxially arranged. The spiral directions of the first threaded segment and the second threaded segment are opposite. The first screw sleeve is threadedly connected to the first threaded segment and is connected to a heating plate. The second screw sleeve is threadedly connected to the second threaded segment and is connected to another heating plate. The optical axis is fixed on the inner wall of the fixed box and is arranged parallel to the transmission shaft. The first screw sleeve and the second screw sleeve are both slidably connected to the optical axis, and the gear is fixed to the transmission shaft and meshes with the rack.

[0014] To implement the above technical solution, when the second slide moves in a direction away from the fixed box, the rack drives the gear to rotate, and the first thread segment and the second thread segment rotate, so that the first screw sleeve and the second screw sleeve can move toward each other along the optical axis, so that the two heating plates can move synchronously toward the mold, and the two heating plates heat both sides of the mold at the same time, so that the mold is heated more evenly, so that the catheter is heated more evenly, and the quality of the balloon is better; similarly, when the second slide moves in a direction close to the fixed box, the heating plate can be moved away from the mold, thereby increasing the cooling speed of the mold to improve production efficiency.

[0015] As a preferred solution of the present invention, the heating plate moves toward the mold and the cooling plate moves away from the mold through a linkage assembly, and the heating plate moves away from the mold and the cooling plate moves toward the mold through the linkage assembly.

[0016] The above technical solution is implemented to improve the efficiency of heating and cooling the mold, thereby further improving production efficiency.

[0017] As a preferred solution of the present invention, the linkage assembly includes a sliding rod, a slider, and a connecting rod. One end of the sliding rod is fixed to the inner wall of the fixed box, and the other end of the sliding rod extends toward the mold. The slider is slidably connected to the sliding rod, one end of the connecting rod is hinged to the first screw sleeve, and the other end of the connecting rod is hinged to the sliding rod. The sliding rod is connected to the cooling plate.

[0018] To implement the above technical solution, when the first screw sleeve and the second screw sleeve move toward each other, the connecting rod moves, causing the slider to move along the sliding rod in the direction away from the mold, thereby causing the slider to drive the cooling plate to move away from the mold; similarly, when the first screw sleeve and the second screw sleeve move away from each other, the slider can drive the cooling plate to move toward the mold, so that the cooling plate is close to the mold and the heating plate is away from the mold, thereby improving the cooling efficiency.

[0019] As a preferred solution of the present invention, a vibration plate is provided on the slider, and the slider moves toward the direction close to the mold and the vibration plate repeatedly hits the mold through the connection structure.

[0020] To implement the above technical solution, when the slider drives the cooling plate to move toward the mold, the vibration plate hits the mold back and forth, causing the mold to vibrate to a certain extent, so as to facilitate demolding the balloon from the cavity.

[0021] As a preferred scheme of the present invention, the connecting structure includes a fixed plate, a screw, a screw tube, a first elastic member, a second elastic member, and a triangular bar. The screw is fixed on the slider and the axis of the screw is parallel to the length direction of the slider. The screw tube is threadedly connected to the screw. The fixed plate is fixed on the screw. One end of the first elastic member is connected to the fixed plate, and the other end of the first elastic member is fixedly connected to the screw tube. The vibration plate is slidably connected to the outer wall of the screw tube. One end of the second elastic member is fixedly connected to the outer wall of the screw tube, and the other end of the second elastic member is fixedly connected to the vibration plate. The triangular bar is fixed to the side of the vibration plate facing the mold and is used to contact the mold.

[0022] To implement the above technical solution, the slider drives the cooling plate to move toward the mold, and the screw tube and the vibration plate come into contact with the outer wall of the mold. As the slider drives the screw to continue to move, the screw tube rotates, and the first elastic member is deformed. During the rotation of the screw tube, the vibration plate rotates synchronously with the screw tube, and the vibration plate is separated from the mold when the triangular bar comes into contact with the outer wall of the mold. After the triangular bar is separated from the mold, the elastic force of the second elastic member causes the vibration plate to hit the outer wall of the mold. When the slider moves away from the mold, the screw tube can be driven to rotate when the first elastic member is restored, so as to reset the screw tube and the vibration plate.

[0023] In summary, the present invention has the following beneficial effects: 1. When the inflatable structure moves away from the fixed box, the heating plate moves towards the mold, and at the same time, the cooling plate moves away from the mold; after the balloon is formed, the inflatable structure moves towards the fixed box, the heating plate moves away from the mold, and at the same time, the cooling plate moves towards the mold to improve the efficiency of heating and cooling; 2. When the cooling plate moves toward the mold, the spiral tube contacts the outer wall of the mold, and the spiral tube drives the vibration plate to rotate. When the triangular bar contacts the mold, it supports the vibration plate to separate from the mold. After the triangular bar is separated from the mold, the elastic force of the second elastic member causes the vibration plate to hit the mold, so as to facilitate the demolding of the balloon from the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the external structure of the present invention; Figure 2 A schematic diagram showing the location of the air pump; Figure 3 To reflect the structural diagram of the fixed box; Figure 4 To reflect the structural diagram of the mold; Figure 5 A schematic diagram showing the structure of the conduction component; Figure 6 for Figure 5 A magnified image of point A; Figure 7 A schematic diagram showing the position of the heating plate.

[0025] 1. Main unit; 11. Fixed box; 12. Cavity; 2. Mold; 21. Cavity; 3. Clamping structure; 31. First slide seat; 32. First chuck; 4. Inflating structure; 41. Second slide seat; 42. Second chuck; 44. Inflating pump; 51. Heating plate; 52. Cooling plate; 53. Connecting hole; 54. Connecting pipe; 6. Conduction component; 61. Rack; 62. Gear; 63. Transmission shaft; 64. First threaded section; 65. Second threaded section; 66. First screw sleeve; 67. Second screw sleeve; 68. Optical axis; 7. Linkage component; 71. Slide rod; 72. Sliding block; 73. Connecting rod; 74. Vibration plate; 8. Connecting structure; 81. Fixed plate; 82. Screw rod; 83. Screw tube; 84. First elastic member; 85. Second elastic member; 86. Triangular bar; 91. Guide rod; 92. Guide groove. DETAILED DESCRIPTION

[0026] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0027] A balloon blow molding device includes a main machine 1, a clamping structure 3 and an inflating structure 4 are slidably connected to the main machine 1, and a fixed box 11 is fixedly connected to the main machine 1, and the fixed box 11 is located between the clamping structure 3 and the inflating structure 4. The fixed box 11 is provided with a mold cavity 12 for placing a mold 2. The mold 2 is cylindrical in shape. Both ends of the mold 2 are supported by the inner wall of the mold cavity 12.

[0028] The clamping structure 3 includes a first slide 31 and a first clamp 32. The first slide 31 is slidably connected to the main machine 1. The first slide 31 is driven by a motor. A slideway is provided on the main machine 1. The first slide 31 is slidably connected in the slideway. Two first clamps 32 are arranged opposite to each other and driven by a cylinder to clamp the catheter. Both first clamps 32 are driven by a cylinder.

[0029] The inflatable structure 4 includes a second slide 41, a second clamp 42, a hard tube and an air pump 44. The second slide 41 is slidably connected to the slideway, and the second slide 41 is driven by a motor. Two second clamps 42 are arranged opposite to each other and slidably connected to the second slide 41, and the two second clamps 42 are used to clamp the catheter. Both second clamps 42 are driven by a cylinder. The air pump 44 is fixed to the second slide 41.

[0030] When in use, place the catheter in the mold 2, place the mold 2 in the mold cavity 12, place one end of the catheter between the two first clamps 32, turn on the air cylinder, and make the two first clamps 32 clamp the end of the catheter to prevent air leakage. Place the end of the catheter away from the first clamp 32 between the two second clamps 42, and place the hard tube in the catheter. Then connect the end of the catheter to the air pump 44. Turn on the air cylinder, so that the two second clamps 42 press the outer wall of the catheter tightly, and the inner wall of the catheter presses against the hard tube to fix the catheter. The hard tube is made of acrylic material or tempered glass.

[0031] The motor is turned on to move the first slide 31 and the second slide 41 away from the fixed box 11, so that the catheter is stretched and the wall of the catheter becomes thinner, thereby making it easier to form a balloon in the middle of the catheter.

[0032] A heating plate 51 for heating the mold 2 and a cooling plate 52 for cooling the mold 2 are arranged in the fixed box 11. The heating plate 51 is heated by electric heating wire, which is a prior art. The cooling plate 52 is hollow and has a plurality of connecting holes 53 facing the mold 2. A connecting pipe 54 for injecting cooling air is connected to the cooling plate 52, and the connecting pipe 54 is connected to the connecting hole 53.

[0033] The fixed box 11 has two heating plates 51 opposite to each other. The second slide 41 moves away from the fixed box 11 and moves the heating plates 51 toward the mold 2 through the conductive assembly 6 .

[0034] The transmission assembly 6 includes a rack 61, a gear 62, a transmission shaft 63, a first threaded section 64, a second threaded section 65, a first screw sleeve 66, a second screw sleeve 67, and an optical axis 68. The rack 61 is fixed to the second slide 41, and the length direction of the rack 61 is parallel to the length direction of the slideway. The transmission shaft 63 is rotatably connected to the fixed box 11. The gear 62 is fixed to the transmission shaft 63 and is coaxially arranged.

[0035] The first thread segment 64 and the second thread segment 65 are respectively fixed to the two ends of the transmission shaft 63 and are coaxially arranged. The spiral directions of the first thread segment 64 and the second thread segment 65 are opposite. The first screw sleeve 66 is threadedly connected to the first thread segment 64, and the first screw sleeve 66 is fixedly connected to one heating plate 51. The second screw sleeve 67 is threadedly connected to the second thread segment 65, and the second screw sleeve 67 is fixedly connected to another heating plate 51.

[0036] The optical axis 68 is fixed on the inner wall of the fixed box 11 and is arranged parallel to the transmission shaft 63. The first screw sleeve 66 and the second screw sleeve 67 are both slidably connected to the optical axis 68.

[0037] When the second slide 41 moves away from the fixed box 11, the rack 61 drives the gear 62 to rotate, the gear 62 drives the transmission shaft 63 to rotate, the first thread segment 64 and the second thread segment 65 rotate, and the first screw sleeve 66 and the second screw sleeve 67 can be moved along the optical axis 68 toward each other through the conduction effect of the thread, so that the two heating plates 51 move toward the mold 2.

[0038] Similarly, when the second slide 41 moves toward the fixed box 11 , the two heating plates 51 can be simultaneously moved toward the direction away from the mold 2 .

[0039] The heating plate 51 moves toward the direction approaching the mold 2 and causes the cooling plate 52 to move away from the mold 2 through the linkage assembly 7 . The heating plate 51 moves toward the direction away from the mold 2 and causes the cooling plate 52 to move toward the mold 2 through the linkage assembly 7 .

[0040] The linkage assembly 7 includes a slide bar 71, a slider 72, and a connecting rod 73. One end of the slide bar 71 is fixed to the inner wall of the fixed box 11, and the other end of the slide bar 71 extends toward the direction close to the mold 2. The length direction of the slide bar 71 is arranged along the radial direction of the mold 2. The cross section of the slide bar 71 is square. The slider 72 is slidably connected to the slide bar 71. The slider 72 is fixedly connected to the cooling plate 52. One end of the connecting rod 73 is hinged to the first screw sleeve 66, and the other end of the connecting rod 73 is hinged to the slider 72.

[0041] A vibration plate 74 is disposed on the slider 72 . The slider 72 moves toward the mold 2 and causes the vibration plate 74 to repeatedly hit the mold 2 through the connection structure 8 .

[0042] The connection structure 8 includes a fixing plate 81, a screw 82, a screw tube 83, a first elastic member 84, a second elastic member 85, and a triangular bar 86. The screw 82 is fixed to the slider 72 and the axis of the screw 82 is parallel to the length direction of the slider 71. The screw tube 83 is threadedly connected to the screw 82, the fixing plate 81 is fixed to the screw 82, one end of the first elastic member 84 is fixedly connected to the fixing plate 81, and the other end of the first elastic member 84 is fixedly connected to the screw tube 83. The first elastic member 84 is a spring. During the rotation of the screw tube 83, the first elastic member 84 is deformed.

[0043] A guide rod 91 is fixedly connected to the outer wall of the screw tube 83, and the length direction of the guide rod 91 is parallel to the axis of the screw tube 83. A guide groove 92 is opened on the inner wall of the vibration plate 74, and the guide rod 91 is slidably connected to the guide groove 92. The vibration plate 74 is slidably connected to the outer wall of the screw tube 83.

[0044] The second elastic member 85 is a spring, one end of which is fixedly connected to the outer wall of the spiral tube 83, and the other end of which is fixedly connected to the vibration plate 74. The triangular bar 86 is fixed to the side of the vibration plate 74 facing the mold 2 and is used to contact the mold 2. The number of the triangular bars 86 is an even number, and the plurality of triangular bars 86 are evenly distributed along the axis of the vibration plate 74.

[0045] When the cooling plate 52 moves toward the mold 2, the screw tube 83 contacts the outer wall of the mold 2. As the slider 72 continues to move downward, the screw rod 82 continues to move downward with the slider 72. The screw tube 83 cannot be displaced, thereby driving the vibration plate 74 to rotate. The first elastic member 84 is deformed, and the triangular bar 86 contacts the mold 2 to support the vibration plate 74 so as to separate it from the mold 2. After the triangular bar 86 is separated from the mold 2, the elastic force of the second elastic member 85 causes the vibration plate 74 to hit the mold 2, so as to facilitate the demolding of the balloon from the inner wall of the cavity 21.

[0046] When the cooling plate 52 approaches the mold 2 , cooling air is injected into the cooling plate 52 and then blown onto the mold 2 from the connecting hole 53 , so that the mold 2 can be cooled quickly.

[0047] When the slider 72 is subsequently moved away from the mold 2 , the first elastic member 84 is restored, thereby driving the screw tube 83 and the vibration plate 74 to return to their original positions.

[0048] Finally, one end of the catheter is separated from the first chuck 32, and the other end of the catheter is taken out of the air pump 44 and then separated from the second chuck 42, and the cooled mold 2 is taken out from the mold cavity 12. After the mold 2 is disassembled, the balloon can be easily taken out from the cavity 21.

[0049] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A balloon blow molding device, comprising a main machine (1), wherein a clamping structure (3) and an inflating structure (4) are slidably connected to the main machine (1), a fixed box (11) is fixedly connected to the main machine (1), the fixed box (11) is located between the clamping structure (3) and the inflating structure (4), and a mold cavity (12) for placing a mold (2) is opened on the fixed box (11), wherein: The fixed box (11) is provided with a heating plate (51) for heating the mold (2) and a cooling plate (52) for cooling the mold (2); the cooling plate (52) is provided with a connecting hole (53) facing the mold (2); the cooling plate (52) is connected with a connecting pipe (54) for injecting cooling gas; the connecting pipe (54) is connected to the connecting hole (53).

2. The balloon blow molding device according to claim 1, characterized in that: The clamping structure (3) comprises a first slide seat (31) and a first clamp (32). The first slide seat (31) is slidably connected to the main machine (1). The two first clamps (32) are arranged opposite to each other and driven by a cylinder to clamp the catheter.

3. The balloon blow molding device according to claim 2, characterized in that: The inflatable structure (4) comprises a second slide (41), a second clamp (42), a hard tube and an air pump (44); the second slide (41) is slidably connected to the main unit (1); two second clamps (42) are slidably connected to the second slide (41) and are used to clamp the catheter; the hard tube is placed in the catheter and fixed by the second clamp (42); and the air pump (44) is fixed to the second slide (41).

4. The balloon blow molding device according to claim 3, characterized in that: Two heating plates (51) arranged opposite to each other are arranged in the fixed box (11). The heating plates (51) are slidably connected in the fixed box (11). The second slide seat (41) moves in a direction away from the fixed box (11) and causes the two heating plates (51) to move synchronously in a direction close to the mold (2) through the conduction component (6).

5. The balloon blow molding device according to claim 4, characterized in that: The transmission component (6) comprises a rack (61), a gear (62), a transmission shaft (63), a first threaded section (64), a second threaded section (65), a first screw sleeve (66), a second screw sleeve (67), and an optical axis (68). The rack (61) is fixed on the second slide seat (41). The transmission shaft (63) is rotatably connected to the fixed box (11). The first threaded section (64) and the second threaded section (65) are respectively fixed on both ends of the transmission shaft (63) and are coaxially arranged. The first threaded section (64) and the second threaded section (65) are coaxially arranged. ) have opposite spiral directions, the first screw sleeve (66) is threadedly connected to the first thread segment (64) and connected to a heating plate (51), the second screw sleeve (67) is threadedly connected to the second thread segment (65) and connected to another heating plate (51), the optical axis (68) is fixed to the inner wall of the fixed box (11) and is arranged parallel to the transmission shaft (63), the first screw sleeve (66) and the second screw sleeve (67) are both slidably connected to the optical axis (68), and the gear (62) is fixed to the transmission shaft (63) and meshes with the rack (61).

6. A balloon blow molding device according to claim 4 or 5, characterized in that: The heating plate (51) moves in a direction approaching the mold (2) and causes the cooling plate (52) to move in a direction away from the mold (2) through the linkage component (7). The heating plate (51) moves in a direction away from the mold (2) and causes the cooling plate (52) to move in a direction approaching the mold (2) through the linkage component (7).

7. The balloon blow molding device according to claim 6, characterized in that: The linkage assembly (7) includes a sliding rod (71), a slider (72), and a connecting rod (73). One end of the sliding rod (71) is fixed to the inner wall of the fixed box (11), and the other end of the sliding rod (71) extends toward the mold (2). The slider (72) is slidably connected to the sliding rod (71). One end of the connecting rod (73) is hinged to the first screw sleeve (66), and the other end of the connecting rod (73) is hinged to the sliding rod (72). The sliding rod (72) is connected to the cooling plate (52).

8. The balloon blow molding device according to claim 7, characterized in that: The slider (72) is provided with a vibration plate (74). The slider (72) moves toward the direction approaching the mold (2) and causes the vibration plate (74) to repeatedly hit the mold (2) through the connection structure (8).

9. The balloon blow molding device according to claim 8, characterized in that: The connection structure (8) comprises a fixing plate (81), a screw rod (82), a screw tube (83), a first elastic member (84), a second elastic member (85), and a triangular bar (86); the screw rod (82) is fixed on the slider (72) and the axis of the screw rod (82) is parallel to the length direction of the slider (71); the screw tube (83) is threadedly connected to the screw rod (82); the fixing plate (81) is fixed on the screw rod (82); the first elastic member (84) is One end is connected to the fixed plate (81), the other end of the first elastic member (84) is fixedly connected to the screw tube (83), the vibration plate (74) is slidably connected to the outer wall of the screw tube (83), one end of the second elastic member (85) is fixedly connected to the outer wall of the screw tube (83), the other end of the second elastic member (85) is fixedly connected to the vibration plate (74), and the triangular bar (86) is fixed to the side of the vibration plate (74) facing the mold (2) and is used to contact the mold (2).

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