Mould opening, closing and locking mechanism

Abstract

The present invention provides a mold opening and closing and mold locking mechanism, which relates to the field of blow molding equipment, in order to solve the technical problem of low working efficiency of the existing mold opening and closing and mold locking mechanism. The mold opening and closing and mold locking mechanism comprises: a frame, a mold shell and a mold locking device, wherein the mold shell and the mold locking device are both connected to the rotating part of the frame; the mold shell comprises two half-mold shells and a mold shell driving device, wherein the rear ends of the two half-mold shells have a rotation center, and the mold shell driving device can drive the two half-mold shells to rotate around their own rotation center at the same time during the rotation with the rotating part, so that the front ends of the two half-mold shells are close to each other for mold closing or away from each other; when the mold shell is in a mold closing state, the mold locking device can simultaneously clamp the corresponding mold locking structures of the two half-mold shells. The mold shell of the present invention adopts two half-mold shell structures, and realizes mold locking and unlocking during the mold shell mold closing and opening process, thereby improving the efficiency of the entire process.

Description

Technical Field

[0001] The invention relates to the field of blow molding equipment, in particular to a mold opening, closing and locking mechanism. Background Art

[0002] Blow molding, also known as hollow blow molding, is a commonly used plastic processing method. It first uses thermoplastic resin to obtain a semi-molten tubular bottle embryo through extrusion or injection molding, and then the bottle embryo is heated to a softened state and placed in an open mold. After the mold is closed, compressed air is immediately introduced into the bottle embryo. With the help of gas pressure, the bottle embryo closed in the mold cavity and in a rubber-like state is inflated, so that it is tightly attached to the inner wall of the cavity to form a hollow product.

[0003] The opening and closing of the mold, as well as the clamping mechanism, play an important role in the production efficiency of preform processing and the quality of the finished product. However, the existing mold opening and closing mechanism usually moves along the mold opening and closing guide rails with a single arm driving the molds on both sides to open and close. The clamping mechanism can be started after the molds are closed. After the bottle blowing is completed, the clamping mechanism is opened before the mold is opened. Therefore, the bearing of the mold opening and closing connecting rod of the existing mold opening and closing mechanism is completely off-center, the force arm is unevenly stressed, and the mold opening and closing stroke is large; at the same time, the clamping mechanism also takes up cycle time, further reducing work efficiency and overall production capacity. In addition, the existing mold opening and closing mechanism and the clamping mechanism are complex in structure and prone to failure, resulting in downtime. Summary of the invention

[0004] The purpose of the present invention is to provide a mold opening, closing and locking mechanism to solve the technical problem of low working efficiency of the existing mold opening, closing and locking mechanism. The preferred technical solution among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a mold opening, closing and locking mechanism, comprising:

[0006] A frame, comprising a fixed portion and a rotating portion, wherein the rotating portion can rotate relative to the fixed portion;

[0007] The mold shell is connected to the rotating part and can rotate with the rotating part; the mold shell includes two half mold shells and a mold shell driving device, the rear ends of the two half mold shells have a rotation center, and the mold shell driving device can drive the two half mold shells to rotate around their own rotation centers at the same time during the rotation with the rotating part, so that the front ends of the two half mold shells are close to each other for mold closing or away from each other;

[0008] A mold locking device is connected to the rotating part. When the mold locking device rotates with the rotating part and when the mold shell is in a closed mold state, the mold locking device can simultaneously clamp the corresponding mold locking structures of the two half mold shells; when the mold locking device is separated from the corresponding mold locking structure, the mold shell can be in an open mold state.

[0009] Preferably, the mold shell driving device includes a cam mechanism and two groups of driving components, the cam mechanism includes a bearing and a bearing track, the bearing track is arranged on a fixed part, the front end of the driving component is fixedly connected to the rear end of the half mold shell, the rear end of the driving component is rotatably connected to the bearing, and the bearing includes a state close to the mold shell and a state away from the mold shell when rotating in the bearing track. The bearing causes the driving component to drive the half mold shell to rotate about the rotation center by moving close to or away from the mold shell, so that the front ends of the two half mold shells are close to each other for mold closing or away from each other.

[0010] Preferably, the driving assembly is a connecting rod mechanism, which includes connecting rod one and connecting rod two, the front end of connecting rod one is fixedly connected to the rear end of the half mold shell, and the rear end of connecting rod one is rotatably connected to the front end of connecting rod two; and the rear end of connecting rod two is rotatably connected to the bearing, when the bearing moves close to the mold shell, the bearing can push the front ends of the half mold shells closer to each other through connecting rod two and connecting rod one; when the bearing moves away from the mold shell, the bearing can pull the front ends of the half mold shells away from each other through connecting rod two and connecting rod one.

[0011] Preferably, the driving assembly is a gear rack mechanism, which includes a gear and a rack that mesh with each other, the gear is fixedly connected to the rear end of the half mold shell, and the rear end of the rack is rotatably connected to the bearing, and when the bearing moves close to the mold shell, the bearing can push the rack to make the gear drive the front end of the half mold shells away from each other; when the bearing moves away from the mold shell, the bearing can pull the rack to make the gear drive the front end of the half mold shells close to each other.

[0012] Preferably, a fixed shaft is provided on the rotation center of the two half mold shells, the fixed shaft is connected to the rotating part and can rotate relative to the rotating part, and the rotating part can drive the mold shell to rotate through the fixed shaft.

[0013] Preferably, a sealing boss is provided at the upper end of the mold shell, and the sealing boss includes a semi-sealing boss arranged on the two semi-mold shells, and the sealing boss is the corresponding structure of the mold locking, and the mold locking device includes a sealing piece, and the sealing piece is located above the sealing boss and can rotate with the rotating part, and a sealing guide rail is provided on the fixed part, and when the mold shell and the sealing piece rotate with the rotating part at the same time, the sealing piece is located in the sealing guide rail and rotates, and the sealing guide rail includes a low-position section and a high-position section, when the sealing piece is in the low-position section, the sealing piece can clamp the sealing boss, and when the sealing piece is in the high-position section, the sealing piece is detached from the sealing boss.

[0014] Preferably, a bottom sealing boss is provided at the lower end of the mold shell, and the bottom sealing boss includes a semi-bottom sealing boss arranged on the two semi-mold shells, and the bottom sealing boss is the corresponding structure of the mold locking, and the mold locking device includes a bottom sealing member, and the bottom sealing member is located below the bottom sealing boss and can rotate with the rotating part, and a bottom sealing guide rail is provided on the fixed part, and when the mold shell and the bottom sealing member rotate with the rotating part, the bottom sealing member is located in the bottom sealing guide rail and rotates, and the bottom sealing guide rail includes a low-position section and a high-position section, when the bottom sealing member is in the high-position section, the bottom sealing member can clamp the bottom sealing boss, and when the bottom sealing member is in the low-position section, the bottom sealing member is detached from the bottom sealing boss.

[0015] Preferably, it further comprises two gripping devices; one of the two gripping devices is a embryo delivery gripping device, and the other is a bottle taking gripping device; the rotating part of the frame is connected to the frame gear, the gripping device is connected to the gripping gear, and the frame gear is meshed with the two gripping gears for transmission; when the mold shell is in the mold opening state and rotates to the embryo delivery position, the embryo delivery gripping device can deliver the gripped bottle embryo into the mold shell; when the mold shell rotates to the bottle discharge position and is in the mold opening state, the bottle taking gripping device can grip the bottle and leave the mold shell.

[0016] Preferably, the hand clamping device comprises a swinging part and a telescopic part, the swinging part is connected to the swinging cam mechanism, and the telescopic part is connected to the telescopic cam mechanism.

[0017] Preferably, a compression spring is connected between the telescopic part and the swing part.

[0018] Beneficial effects of the present invention: the mold shell of the present invention adopts a two-mold shell structure, which is opened and closed at the relative middle position of the two half-mold shells, so the dynamic balance is better, and under the same opening and closing angle, the stroke of the mold shell driving device can be reduced by half, so that the structure is more stable and the efficiency is higher; at the same time, the locking device adopts a card-locking method, and during the mold shell closing and opening process, the mold is locked and unlocked accordingly, so that the entire molding cycle is shorter and the mechanical production capacity is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the mold opening, closing and locking mechanism in Example 1;

[0021] Figure 2 is a schematic structural diagram of the front side of the mold shell in Example 1;

[0022] Figure 3 is a schematic structural diagram of the side surface of the mold shell in Example 1;

[0023] Figure 4 is a schematic structural diagram of the top surface of the mold shell in Example 1;

[0024] Figure 5 It is a structural schematic diagram of the mold opening and closing and mold clamping states of the mold-locking mechanism in Example 1;

[0025] Figure 6 It is a structural schematic diagram of the mold opening and closing and mold locking mechanism in the mold opening state in Example 1;

[0026] Figure 7 is a schematic structural diagram of the hand clamping device in Example 1;

[0027] Figure 8 is a schematic diagram of the structure of the track plate in the hand clamping device in Example 1;

[0028] Fig. 9 It is a structural schematic diagram of the mold shell driving device in Example 2.

[0029] Among them: 11, frame gear; 12, middle plate; 13, upper plate; 14, bearing track; 15, sealing guide rail; 16, bottom guide rail; 2, half mold shell; 21, fixed shaft; 22, half sealing boss; 221, sealing part; 222, sealing roller; 23, half bottom boss; 231, bottom sealing; 232, bottom sealing roller; 24, bearing; 251, connecting rod 1; 252, connecting rod 2; 261, gear; 262, rack; 31, hand clamping gear; 32, transmission rod; 321, turntable; 33, hand clamping device; 331, telescopic bearing; 332, swing bearing; 333, telescopic part; 334, swing part; 34, track plate; 341, telescopic bearing motion track; 342, swing bearing motion track. DETAILED DESCRIPTION

[0030] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0031] Example 1

[0032] like Figure 1-6 As shown, this embodiment provides a mold opening, closing and locking mechanism, including a frame, a mold shell and a locking device, the frame includes a fixed part and a rotating part, the rotating part can rotate relative to the fixed part, and the rotating power of the rotating part can be provided by existing equipment such as a motor; specifically, the rotating part includes a frame gear 11 located at the bottom, a middle plate 12 and an upper plate 13 located above the frame gear 11, the middle plate 12 and the upper plate 13 and the middle plate 12 and the frame gear 11 are fixedly connected by a supporting component, and the supporting component can be a columnar or plate-shaped structure that can be connected and supported;

[0033] In this embodiment, the mold shell includes two half mold shells 2 and a mold shell driving device. The rear ends of the two half mold shells 2 have a rotation center, and a fixed shaft 21 is provided on the rotation center. The mold shell is connected between the middle plate 12 and the upper plate 13. The middle plate 12 and the upper plate 13 are provided with a rotating shaft hole. The upper and lower ends of the fixed shaft 21 are respectively connected to the rotating shaft holes of the upper plate 13 and the middle plate 12, so that the mold shell can follow the rotation of the upper plate 13 and the middle plate 12 and revolve around the frame. At the same time, the two half mold shells 2 can also rotate at their own rotation centers to realize mold opening and mold closing.

[0034] In this embodiment, the mold shell driving device includes a cam mechanism and two sets of driving components; the cam mechanism includes a bearing 24 and a bearing track 14, and the bearing track 14 is arranged on the fixed part; Figure 2-4As shown, the driving assembly is a connecting rod mechanism, which includes a connecting rod 1 251 and a connecting rod 252. The front end of the connecting rod 1 251 is fixedly connected to the rear end of the half mold shell 2, and the rear end of the connecting rod 1 251 is rotatably connected to the front end of the connecting rod 252 (the connection rotation center is the hinge point A in the figure); and the rear end of the connecting rod 252 is rotatably connected to the bearing 24 (the connection rotation center is the hinge point B in the figure); when the mold shell rotates with the rotating part, it can drive the bearing 24 to rotate in the guide rail; the bearing track 14 includes a far mold section that keeps the bearing 24 away from the mold shell and a near mold section that keeps the bearing 24 close to the mold shell, Since the positions of the rotating shaft, the half mold shell 2 and the connecting rod 1 251 are relatively fixed, the connecting rod 1 251 is rotationally connected to the connecting rod 2 252, and the connecting rod 2 252 is rotationally connected to the bearing 24, so when the bearing 24 moves close to the mold shell, the two hinge points A will move away from each other due to the thrust, and at this time, the front ends of the two half mold shells 2 rotate with the middle point C in the rotation center diagram, so as to move closer to each other to achieve mold closing; similarly, when the bearing 24 moves away from the mold shell in the guide rail, the two hinge points A will move closer to each other due to the pulling force, and at this time, the front ends of the two half mold shells 2 rotate with the middle point C in the rotation center diagram, so as to move away from each other to achieve mold opening. The mold shell opens and closes relative to the middle position of the two half mold shells 2, and the dynamic balance is better, and at the same opening and closing angle, the stroke of the structural bearing 24 of this embodiment can be reduced by half, so that the cam curvature is smaller, more stable, and more efficient.

[0035] As an optional implementation, the mold locking corresponding structure in this embodiment includes a sealing boss at the upper end of the mold shell and a bottom sealing boss at the lower end of the mold shell. Correspondingly, the mold locking device includes a sealing member and a bottom sealing member, such as Figure 2-6 shown.

[0036] The sealing boss includes a semi-sealing boss 22 arranged on two half mold shells 2. The sealing piece is located above the sealing boss and can rotate with the upper plate 13. The sealing piece includes a sealing portion 221 and a sealing roller 222 that are connected to each other. A sealing guide rail 15 is provided on the fixed portion. The sealing guide rail 15 includes a high-position section and a low-position section. When the mold shell and the sealing piece rotate with the rotating portion at the same time, the sealing piece is located in the sealing guide rail 15 and rotates. The sealing guide rail 15 includes a low-position section and a high-position section. When the sealing roller 222 is in the low-position section, the sealing portion 221 is in a lower position and can clamp the sealing boss, so that the mold shell is in a locked state. When the sealing roller 222 is in the high-position section, the sealing portion 221 is in a higher position and disengaged from the sealing boss, so that the mold shell is in an unlocked state.

[0037] The bottom cover boss includes a semi-bottom cover boss 23 arranged on two half mold shells 2. The bottom cover piece is located below the bottom cover boss and can rotate with the middle plate 12. The bottom cover piece includes a bottom cover bottom 231 and a bottom cover roller 232. The fixed part is provided with a bottom cover guide rail 16. When the mold shell and the bottom cover bottom 231 rotate with the rotating part, the bottom cover roller 232 is located in the bottom cover guide rail 16 and rotates. The bottom cover guide rail 16 includes a low-position section and a high-position section. When the bottom cover roller 232 is in the high-position section, the bottom cover piece can clamp the bottom cover boss. When the bottom cover piece is in the low-position section, the bottom cover piece is detached from the bottom cover boss.

[0038] The bearing rail 14, the sealing guide rail 15 and the bottom guide rail 16 are all fixed parts of the frame. The near-mold section of the bearing rail 14, the low-position section of the sealing guide rail 15 and the high-position section of the bottom guide rail 16 correspond to each other. At this time, the mold shell is in a mold-closed state, and the mold locking device locks the mold shell; the far-mold section of the bearing rail 14, the high-position section of the sealing guide rail 15 and the low-position section of the bottom guide rail 16 correspond to each other. At this time, the mold shell is in an open mold state, and the mold locking device is unlocked. Therefore, as the rotating part rotates, the mold locking device is unlocked while the mold shell is open, and the mold locking device is locked while the mold shell is closed. The mold locking no longer takes extra time, which shortens the entire cycle, improves work efficiency, and increases production capacity. Of course, the height changes of the sealing parts and the bottom parts are not limited to the high and low position settings of the guide rails, and can also be achieved by devices such as cylinders.

[0039] As an optional implementation, this embodiment also includes two gripping devices 33, namely a preform delivery gripping hand and a bottle retrieval gripping hand; the gripping device 33 is connected to the gripping gear 31, and the frame gear 11 is simultaneously meshed and transmitted with the two gripping gears 31; when the mold shell is in the mold opening state and rotates to the preform delivery position, the preform delivery gripping hand can deliver the gripped bottle preform into the mold shell; when the mold shell rotates to the bottle discharge position and is in the mold opening state, the bottle retrieval gripping hand can grip the bottle and leave the mold shell.

[0040] Specifically, Figure 7-8 As shown, the gripping device 33 includes a swinging portion 334, a telescopic portion 333, a swing cam mechanism, a telescopic cam mechanism and a track plate 34. The swinging portion 334 is connected to the swing bearing 332 of the swing cam mechanism, and the telescopic portion 333 is connected to the telescopic bearing 331 of the telescopic cam mechanism. The outer track of the track plate 34 is the telescopic bearing motion track 341, and the inner track of the track plate 34 is the swing bearing motion track 342. When the telescopic bearing 331 and the swing bearing 332 move to the position shown in FIG. Figure 8When the clamping device 33 is in the position shown, the telescopic bearing 331 can drive the telescopic part 333 to be compressed in the direction of the swinging part 334. At the same time, the swinging part 334 maintains a short swinging state under the action of the swing bearing 332, thereby extending the docking time between the clamping device 33 and the mold shell and completing the action of delivering the embryo and taking the bottle. The clamping device 33 of this embodiment uses a double cam structure, one cam mechanism realizes the swinging of the clamping hand, and the other cam mechanism realizes the extension and retraction of the clamping hand, which can realize the tracking of the clamping hand to the mold position, making the handover smoother.

[0041] In order to reduce the possibility of failure, a compression spring (not shown) is arranged at the connection position between the telescopic part 333 and the swing part 334. The compression spring is always in a compressed state. When the telescopic part 333 is compressed close to the swing part 334, the compression spring is further compressed. By replacing the tension spring in the traditional hand clamping device 33 with the compression spring, the spring can be prevented from being broken, thus avoiding the impact of equipment failure on production efficiency.

[0042] Example 2

[0043] like Fig. 9 As shown, the difference between this embodiment and embodiment 1 is that the driving component is a gear 261 and rack 262 mechanism, and the gear 261 and rack 262 mechanism includes a gear 261 and a rack 262 that mesh with each other, and the tooth surfaces of the two racks 262 are opposite to each other. The gear 261 is fixedly connected to the rear end of the half mold shell 2. In this embodiment, the rotation center of the gear 261 coincides with the rotation center of the rotating shaft, and the rear end of the rack 262 is rotatably connected to the bearing 24. When the bearing 24 moves close to the mold shell, the bearing 24 can push the rack 262 to move toward the mold shell, and at the same time make the two gears 261 rotate in opposite directions, and the gear 261 drives the half mold shell 2 to rotate around the rotation center so that the front ends of the two half mold shells 2 are away from each other; when the bearing 24 moves away from the mold shell, the bearing 24 can change the rotation direction of the two gears 261 by pulling the rack 262, and at this time drive the front ends of the half mold shells 2 to approach each other.

[0044] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A mold opening, closing and locking mechanism, characterized in that: include: A frame, comprising a fixed portion and a rotating portion, wherein the rotating portion can rotate relative to the fixed portion; A mold shell connected to the rotating part and capable of rotating with the rotating part; The mold shell comprises two half mold shells (2) and a mold shell driving device, the rear ends of the two half mold shells (2) have a rotation center, and the mold shell driving device can drive the two half mold shells (2) to rotate around their own rotation centers simultaneously during the rotation process with the rotating part, so that the front ends of the two half mold shells (2) are close to each other for mold closing or away from each other for mold separation; A mold locking device is connected to the rotating part. When the mold locking device rotates with the rotating part and when the mold shell is in a mold closing state, the mold locking device can simultaneously clamp the mold locking corresponding structures of the two half mold shells (2); when the mold locking device is separated from the mold locking corresponding structures, the mold shell can be in an open mold state. A sealing boss is provided at the upper end of the mold shell, and the sealing boss includes a semi-sealing boss (22) arranged on the two semi-mold shells (2). The sealing boss is a corresponding structure of the mold locking device. The mold locking device includes a sealing member, and the sealing member is located above the sealing boss and can rotate with the rotating part. A sealing guide rail (15) is provided on the fixed part. When the mold shell and the sealing member rotate with the rotating part at the same time, the sealing member is located in the sealing guide rail (15) and rotates. The sealing guide rail (15) includes a low-position section and a high-position section. When the sealing member is in the low-position section, the sealing member can clamp the sealing boss. When the sealing member is in the high-position section, the sealing member is separated from the sealing boss. The mold shell driving device comprises a cam mechanism and two groups of driving components, the cam mechanism comprises a bearing (24) and a bearing track (14), the bearing track (14) is arranged on a fixed part, the front end of the driving component is fixedly connected to the rear end of the half mold shell (2), the rear end of the driving component is rotatably connected to the bearing (24), and the bearing (24) includes a state of approaching the mold shell and a state of moving away from the mold shell when rotating in the bearing track (14). The bearing (24) drives the half mold shell (2) to rotate about the rotation center by moving toward or away from the mold shell, so that the front ends of the two half mold shells (2) are close to each other for mold closing or away from each other. The driving assembly is a connecting rod mechanism, which includes a connecting rod 1 (251) and a connecting rod 2 (252). The front end of the connecting rod 1 (251) is fixedly connected to the rear end of the half mold shell (2), and the rear end of the connecting rod 1 (251) is rotatably connected to the front end of the connecting rod 2 (252); and the rear end of the connecting rod 2 (252) is rotatably connected to the bearing (24). When the bearing (24) moves closer to the mold shell, the bearing (24) can push the front ends of the half mold shells (2) closer to each other through the connecting rod 2 (252) and the connecting rod 1 (251); when the bearing (24) moves away from the mold shell, the bearing (24) can pull the front ends of the half mold shells (2) away from each other through the connecting rod 2 (252) and the connecting rod 1 (251).

2. The mold opening, closing and locking mechanism according to claim 1, characterized in that: A fixed shaft (21) is provided at the rotation center of the two half mold shells (2); the fixed shaft (21) is connected to the rotating part and can rotate relative to the rotating part; the rotating part can drive the mold shell to rotate through the fixed shaft (21).

3. The mold opening, closing and locking mechanism according to claim 1, characterized in that: A bottom sealing boss is provided at the lower end of the mold shell, and the bottom sealing boss includes a semi-bottom sealing boss (23) arranged on the two semi-mold shells (2), and the bottom sealing boss is a corresponding structure of the mold locking device. The mold locking device includes a bottom sealing member, and the bottom sealing member is located below the bottom sealing boss and can rotate with the rotating part. A bottom sealing guide rail (16) is provided on the fixed part. When the mold shell and the bottom sealing member rotate with the rotating part, the bottom sealing member is located in the bottom sealing guide rail (16) and rotates, and the bottom sealing guide rail (16) includes a low-position section and a high-position section. When the bottom sealing member is in the high-position section, the bottom sealing member can clamp the bottom sealing boss, and when the bottom sealing member is in the low-position section, the bottom sealing member is separated from the bottom sealing boss.

4. The mold opening, closing and locking mechanism according to any one of claims 1 to 3, characterized in that: The invention also comprises two gripping devices (33); one of the two gripping devices (33) is a preform delivery gripping device, and the other is a bottle taking gripping device; the rotating part of the frame is connected to the frame gear (11), the gripping device (33) is connected to the gripping gear (31), and the frame gear (11) is simultaneously meshed with the two gripping gears (31) for transmission; when the mold shell is in the mold opening state and rotates to the preform delivery position, the preform delivery gripping device can deliver the gripped bottle preform into the mold shell; when the mold shell rotates to the bottle discharging position and is in the mold opening state, the bottle taking gripping device can grip the bottle and leave the mold shell.

5. The mold opening, closing and locking mechanism according to claim 4, characterized in that: The hand clamping device (33) comprises a swinging part (334) and a telescopic part (333); the swinging part (334) is connected to a swinging cam mechanism, and the telescopic part (333) is connected to a telescopic cam mechanism.

6. The mold opening, closing and locking mechanism according to claim 5, characterized in that: A compression spring is connected between the telescopic portion (333) and the swing portion (334).

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