Blow molding and cooling integrated device for plastic packaging bottle
By designing a blow-molding cooling integrated device for plastic packaging bottles using servo motors and gear transmission, the existing devices are slow cooling and cumbersome to be demolded, and rapid demolding and efficient production are achieved, and noise is reduced.
Patent Information
- Application Number
- CN202510543979.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2025-06-17
AI Technical Summary
When used, the existing plastic packaging bottle blow molding device requires manual mold removal, which is slow to cool, which reduces the demolding efficiency, is cumbersome and has a high noise, which affects the health of the operator.
A blow-molding cooling integrated device for plastic packaging bottles is designed, and the first gear and the first tooth plate are driven by a servo motor to mesh transmission. The air outlet is adjusted through the limit slide rod and the support plate to achieve cooling and rapid mold release of the molded plastic packaging bottles, and the mold and push plate are driven by the cylinder to simplify the operation steps.
The rapid disengagement without manual demolding is achieved, which simplifies operational steps, improves production efficiency, and reduces noise generation through the buffer mechanism.
Smart Images
Figure CN120156087A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of blow molding equipment, and particularly relates to an integrated device for blow molding and cooling plastic packaging bottles. Background Art
[0002] Plastic packaging bottle blow molding equipment is a key equipment for producing plastic packaging bottles. Plastic packaging bottle blow molding equipment usually adopts the process principles of extrusion-blow molding or injection-blow molding. Extrusion-blow molding is to first heat and melt plastic raw materials through an extruder and extrude them into a tubular preform, then place the preform into a blow molding mold, and blow up the preform through compressed air to make it fit the inner wall of the mold, and obtain a plastic packaging bottle after cooling and shaping.
[0003] When the existing plastic packaging bottle blow molding devices are in use, most of them need to manually demold the formed plastic packaging bottles. Since the products cool relatively slowly, the demolding efficiency is reduced, and the operation is rather cumbersome, laborious and inconvenient, resulting in the need to perform the demolding action and the collection action in a coordinated and step-by-step manner, so that the production efficiency of the device is poor. In addition, the impact energy generated when the mold opens and closes causes resonance of the installation frame, resulting in noise and affecting the health of operators. Summary of the Invention
[0004] The present invention relates to an integrated device for blow molding and cooling plastic packaging bottles. By using the meshing transmission of a first gear and two first toothed plates, and through the mutual cooperation of a limit slide rod and a support plate, the two adjusting frames can be simultaneously driven to drive the air outlet to adjust towards the middle, and are connected to an external fan through a docking sleeve, and the air outlet cools the blow molded plastic packaging bottles. Moreover, according to the air volume, the product can be blown to quickly separate from the fixed mold, which saves the trouble of manual demolding, simplifies the operation steps of the device, and is fast and convenient to use.
[0005] In the first aspect of the present invention, an integrated device for blow molding and cooling plastic packaging bottles is provided, specifically including: a support frame, the support frame is of a rectangular frame structure, and a base is arranged inside the support frame; adjusting frames are arranged on the left and right sides of the base, and the two adjusting frames are symmetrically distributed; a push plate is arranged inside the base; a fixed mold and a movable mold are arranged above the base, and the movable mold is located in front of the fixed mold; A top seat is arranged at the top of the support frame, a control panel is arranged at the front of the top seat, a blow molding head is arranged at the bottom of the top seat, and the blow molding head corresponds to the positions of the fixed mold and the movable mold. Support plates are arranged on the left and right sides of the support frame, and the two support plates are symmetrically distributed.
[0006] In at least some embodiments, a collection groove is arranged inside the base, a bottom plate is arranged at the rear of the collection groove, and the bottom plate corresponds to the positions of the fixed mold and the movable mold. Through grooves are arranged on the left and right side walls of the base, a fixing plate is arranged inside the base, a servo motor is arranged at the bottom of the fixing plate, and a first gear is arranged at the top end of the rotating shaft of the servo motor.
[0007] In at least some embodiments, two limiting slide rods are provided on the relatively outer sides of the two adjusting frames, a first toothed plate is provided on the relatively inner sides of the two adjusting frames, and the two first toothed plates are distributed in a central symmetry manner. A docking sleeve is provided on the top of the adjusting frame, a connecting pipe is provided on the docking sleeve, and an air outlet is provided at the end of the connecting pipe.
[0008] In at least some embodiments, the limiting slide rods of the adjusting frame slidably penetrate through the support plate, the first toothed plate is slidably inserted into the through groove, the first gear is meshed with the first toothed plate, and the air outlet corresponds to the position of the fixed mold.
[0009] In at least some embodiments, two second toothed plates a are provided at the front part of the push plate, and the two second toothed plates a are distributed symmetrically. Guide sliders are provided on the relatively outer sides of the two second toothed plates a, side plates are provided on the left and right sides of the push plate, and the two side plates are distributed symmetrically.
[0010] In at least some embodiments, guide chutes are provided on the relatively inner sides of the two side plates, and the second toothed plate a is slidably connected to the guide chute through the guide slider. A rotating sleeve is provided on the top of the side plate, a rotating shaft is rotatably installed in the rotating sleeve, a second gear is provided at the end of the rotating shaft, and the second gear is meshed with the second toothed plate a.
[0011] In at least some embodiments, a first fixing frame is provided at the rear side of the fixed mold, and the first fixing frame is fixedly connected to the base. Four limiting sleeves are provided at the front side of the first fixing frame, and the four limiting sleeves are distributed in a rectangular array. Two buffer seats are provided between the fixed mold and the first fixing frame, and the two buffer seats are distributed in a parallel manner up and down. Two sliding blocks are provided on the buffer seats, and the two sliding blocks are distributed symmetrically. An installation plate is provided in front of the buffer seat, and the installation plate is connected to the fixed mold.
[0012] In at least some embodiments, an installation chute is provided at the front part of the buffer seat, and a U-shaped cavity is provided at the middle position on the top of the buffer seat; A limiting through hole is provided on the sliding block, a support sleeve is provided on one sliding block, a plug rod is provided on the other sliding block, and a compression spring is sleeved on the plug rod; Two positioning slide rods are provided at the rear side of the installation plate, and the two positioning slide rods are distributed symmetrically.
[0013] In at least some embodiments, the sliding block is slidably connected to the buffer seat through the installation chute, the plug rod is slidably inserted into the support sleeve, the compression spring is supported between the two sliding blocks, and the positioning slide rod slidably penetrates through the limiting through hole.
[0014] In at least some embodiments, a connecting plate is provided at the front of the movable mold, a second fixed frame is provided at the rear of the connecting plate, and the second fixed frame is fixedly connected to the base, a cylinder is fixedly installed at the rear of the second fixed frame, and the end of the telescopic rod of the cylinder is connected to the connecting plate, four limiting round rods are provided at the rear of the connecting plate, and the limiting round rods are slidably inserted in the limiting sleeve, and two second tooth plates b are provided at the bottom of the movable mold, and the second tooth plates b are meshingly connected to the second gear.
[0015] The present invention provides a blow molding and cooling integrated device for plastic packaging bottles, which has the following beneficial effects: In the present invention, the servo motor provides power, the first gear and the two first tooth plates are meshed for transmission, and the limiting slide rod and the support plate cooperate with each other, so that the two adjustment frames can simultaneously drive the air outlet to be adjusted to the middle, and are connected to the external fan through a docking sleeve. The blow-molded plastic packaging bottle is cooled by the air outlet, and the product can be blown away from the fixed mold quickly according to the air output volume, which saves the trouble of manual demoulding, simplifies the operation steps of the device, and is quick and convenient to use.
[0016] In addition, in the present invention, the cylinder provides power, and the limit round rod and the limit sleeve cooperate with each other to drive the movable mold to adjust forward to complete the mold opening state. Since a push plate is provided, the second gear is meshed with the second tooth plate a and the second tooth plate b to drive the push plate to adjust backward. When the formed plastic packaging bottle is demolded and falls to the bottom plate, the movable mold is driven backward to close with the fixed mold. At the same time, the push plate is controlled to push the product on the bottom plate to slide forward into the collecting tank. The mold closing action and the product pushing and collecting action are combined together through mechanical transmission and performed at one time, eliminating the trouble of step-by-step operation and effectively improving the production efficiency of the device.
[0017] In addition, when the movable mold and the fixed mold are in a closed state, the fixed mold drives the mounting plate to adjust backward. The sliding block can be controlled to slide along the mounting groove of the buffer seat by sliding the positioning slide rod and the limiting through-hole of the sliding block. The compression spring rebound effect can buffer the closing process of the movable mold and the fixed mold, thereby absorbing the impact energy generated when the mold is closed, alleviating the vibration of the impact, and effectively reducing the generation of noise. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.
[0019] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.
[0020] In the attached picture: Figure 1 A schematic diagram showing the overall structure of the present application; Figure 2 Shows a schematic diagram of the support frame of the present application; Figure 3 Shows a schematic diagram of the base, adjustment frame and push plate of the present application; Figure 4 Shows a schematic diagram of the base of the present application from a sectional perspective; Figure 5 Shows a schematic diagram of the adjustment frame and the fixed mold of the present application; Figure 6 Shows a schematic diagram of the push plate of the present application; Figure 7 Shows a schematic diagram of the fixed mold and the movable mold of the present application; Figure 8 Shows a schematic diagram of the split state of the fixed mold and the first fixing frame of the present application; Figure 9 Shows a schematic diagram of the split state of the buffer seat, sliding block and mounting plate of the present application.
[0021] List of reference numerals: 1, support frame; 101, top seat; 102, control panel; 103, blow molding head; 104, support plate; 2, base; 201, collection tank; 202, bottom plate; 203, through groove; 204, fixing plate; 205, servo motor; 206, first gear; 3, adjustment frame; 301, limit slide bar; 302, first toothed plate; 303, docking sleeve; 304, connecting pipe; 305, air outlet; 4, push plate; 401, second toothed plate a; 402, guide slider; 403, side plate; 4031, guide chute; 4032, rotating sleeve; 4033, second gear; 5, fixed mold; 501, first fixing frame; 502, limit sleeve; 503, buffer seat; 5031, installation chute; 5032, U-shaped cavity; 504, sliding block; 5041, limit through hole; 5042, support sleeve; 5043, insertion rod; 5044, compression spring; 505, mounting plate; 5051, positioning slide bar; 6, movable mold; 601, connecting plate; 602, second fixing frame; 603, cylinder; 604, limit round rod; 605, second toothed plate b. Detailed implementation manners
[0022] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.
[0023] Example 1: Please refer to Figures 1 to 9 : The present invention provides a plastic packaging bottle blow molding and cooling integrated device, including: a support frame 1, the support frame 1 is a rectangular frame structure, and a base 2 is provided inside the support frame 1; adjusting frames 3 are provided on both left and right sides of the base 2, and the two adjusting frames 3 are distributed symmetrically; a push plate 4 is provided inside the base 2; a fixed mold 5 and a moving mold 6 are provided above the base 2, and the moving mold 6 is located in front of the fixed mold 5; A top seat 101 is provided at the top of the support frame 1, a control panel 102 is provided at the front of the top seat 101, a blow molding head 103 is provided at the bottom of the top seat 101, and the blow molding head 103 corresponds to the positions of the fixed mold 5 and the moving mold 6. Support plates 104 are provided on both left and right sides of the support frame 1, and the two support plates 104 are distributed symmetrically.
[0024] In this embodiment, as Figures 2 to 5 shown, a collection groove 201 is provided inside the base 2, a bottom plate 202 is provided at the rear of the collection groove 201, and the bottom plate 202 corresponds to the positions of the fixed mold 5 and the moving mold 6. Through grooves 203 are provided on the left and right side walls of the base 2, a fixing plate 204 is provided inside the base 2, a servo motor 205 is provided at the bottom of the fixing plate 204, and a first gear 206 is provided at the top end of the rotating shaft of the servo motor 205; Two limiting slide rods 301 are provided on the relatively outer sides of the two adjusting frames 3, a first toothed plate 302 is provided on the relatively inner sides of the two adjusting frames 3, and the two first toothed plates 302 are distributed centrosymmetrically. A docking sleeve 303 is provided at the top of the adjusting frame 3, a connecting pipe 304 is provided on the docking sleeve 303, and an air outlet 305 is provided at the end of the connecting pipe 304; The limiting slide rods 301 of the adjusting frame 3 slide through the support plate 104, and the first toothed plate 302 is slidably inserted into the through groove 203, and the first gear 206 is meshed with the first toothed plate 302. Moreover, the air outlet 305 corresponds to the position of the fixed mold 5. In the present invention, power is provided by the servo motor 205, and through the meshing transmission of the first gear 206 and the two first toothed plates 302, and through the mutual cooperation of the limiting slide rods 301 and the support plate 104, the two adjusting frames 3 can be simultaneously driven to drive the air outlet 305 to adjust towards the middle, and the docking sleeve 303 is connected to an external fan, and the blow molded plastic packaging bottle is cooled by the air outlet 305, and the product can be quickly separated from the fixed mold 5 according to the air volume.
[0025] In this embodiment, as Figure 6 and Figure 7 shown, two second toothed plates a401 are provided at the front of the push plate 4, and the two second toothed plates a401 are distributed symmetrically. Guide sliders 402 are provided on the relatively outer sides of the two second toothed plates a401, side plates 403 are provided on both left and right sides of the push plate 4, and the two side plates 403 are distributed symmetrically; On the relative inner sides of the two side plates 403, there are guiding sliding grooves 4031, and the second toothed plate a401 is slidably connected to the guiding sliding grooves 4031 through guiding sliders 402. At the top of the side plate 403, there is a rotating sleeve 4032. A rotating shaft is rotatably installed in the rotating sleeve 4032, and at the end of the rotating shaft, there is a second gear 4033, and the second gear 4033 is meshed and connected with the second toothed plate a401; At the front of the moving mold 6, there is a connecting plate 601. Behind the connecting plate 601, there is a second fixing frame 602, and the second fixing frame 602 is fixedly connected to the base 2. At the rear of the second fixing frame 602, a cylinder 603 is fixedly installed, and the end of the telescopic rod of the cylinder 603 is connected to the connecting plate 601. At the rear of the connecting plate 601, there are four limiting round rods 604, and the limiting round rods 604 are slidably inserted into the limiting sleeves 502. At the bottom of the moving mold 6, there are two second toothed plates b605, and the second toothed plates b605 are meshed and connected with the second gear 4033. In the present invention, power is provided by the cylinder 603. Through the mutual cooperation of the limiting round rods 604 and the limiting sleeves 502, the moving mold 6 can be driven to adjust forward to complete the mold opening state. Due to the provision of the pushing plate 4, through the meshing transmission of the second gear 4033 with the second toothed plate a401 and the second toothed plate b605, the second toothed plate a401 can drive the pushing plate 4 to adjust backward. When the formed plastic packaging bottle is demolded and falls onto the bottom plate 202, then the moving mold 6 is driven to move backward and close with the fixed mold 5, and at the same time, the pushing plate 4 is controlled to push the product on the bottom plate 202 to slide forward into the collection groove 201.
[0026] Embodiment 2, on the basis of Embodiment 1, as Figure 8 and Figure 9 shown, at the rear side of the fixed mold 5, there is a first fixing frame 501, and the first fixing frame 501 is fixedly connected to the base 2. At the front side of the first fixing frame 501, there are four limiting sleeves 502, and the four limiting sleeves 502 are distributed in a rectangular array. Between the fixed mold 5 and the first fixing frame 501, there are two buffer seats 503, and the two buffer seats 503 are distributed in a parallel up-and-down manner. On the buffer seats 503, there are two sliding blocks 504, and the two sliding blocks 504 are distributed symmetrically. In front of the buffer seats 503, there is a mounting plate 505, and the mounting plate 505 is connected to the fixed mold 5; At the front part of the buffer seat 503, there is a mounting sliding groove 5031, and in the middle position at the top of the buffer seat 503, there is a U-shaped cavity 5032; On the sliding block 504, there is a limiting through hole 5041. On one sliding block 504, there is a support sleeve 5042, and on the other sliding block 504, there is an insertion rod 5043. A compression spring 5044 is sleeved on the insertion rod 5043; At the rear side of the mounting plate 505, there are two positioning sliding rods 5051, and the two positioning sliding rods 5051 are distributed symmetrically; The sliding block 504 is slidably connected to the buffer seat 503 through the installation chute 5031, and the insertion rod 5043 is slidably inserted into the support sleeve 5042. Moreover, the compression spring 5044 is supported between the two sliding blocks 504, and the positioning slide rod 5051 slidably penetrates the limit through hole 5041. When the moving mold 6 and the fixed mold 5 are in a closed state, the fixed mold 5 drives the mounting plate 505 to adjust backward. Through the sliding insertion cooperation between the positioning slide rod 5051 and the limit through hole 5041 of the sliding block 504, the sliding block 504 can be controlled to slide along the installation chute 5031 of the buffer seat 503. By utilizing the rebounding effect of the compression spring 5044, it can buffer the closing process of the moving mold 6 and the fixed mold 5, thereby absorbing the impact energy generated during the closing of the mold, alleviating the impact vibration, and effectively reducing the generation of noise.
[0027] The working principle of this embodiment: During use, power is provided by the servo motor 205. By using the meshing transmission between the first gear 206 and the two first toothed plates 302, and through the mutual cooperation of the limit slide rod 301 and the support plate 104, the two adjusting frames 3 can be simultaneously driven to adjust the air outlet 305 towards the middle. The air outlet 305 is connected to an external blower through the docking sleeve 303, and the plastic packaging bottles formed by blow molding are cooled by the air outlet 305. Moreover, according to the air volume, the product can be blown to quickly separate from the fixed mold 5; Power is provided by the cylinder 603. Through the mutual cooperation of the limit round rod 604 and the limit sleeve 502, the moving mold 6 can be driven to adjust forward to complete the mold opening state. Since there is a push plate 4, through the meshing transmission between the second gear 4033 and the second toothed plate a 401 and the second toothed plate b 605, the second toothed plate a 401 can drive the push plate 4 to adjust backward. When the formed plastic packaging bottle is demolded and falls onto the bottom plate 202, then the moving mold 6 is driven to move backward and close with the fixed mold 5. At the same time, the push plate 4 is controlled to push the product on the bottom plate 202 to slide forward into the collection groove 201; When the moving mold 6 and the fixed mold 5 are in a closed state, the fixed mold 5 drives the mounting plate 505 to adjust backward. Through the sliding insertion cooperation between the positioning slide rod 5051 and the limit through hole 5041 of the sliding block 504, the sliding block 504 can be controlled to slide along the installation chute 5031 of the buffer seat 503. By utilizing the rebounding effect of the compression spring 5044, it can buffer the closing process of the moving mold 6 and the fixed mold 5.
[0028] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.
Claims
1. A blow molding and cooling integrated device for plastic packaging bottles, characterized in that: include: A support frame (1), the support frame (1) being a rectangular frame structure, and a base (2) being provided inside the support frame (1); adjustment frames (3) being provided on the left and right sides of the base (2), and the two adjustment frames (3) being symmetrically distributed; a push plate (4) being provided inside the base (2); a fixed mold (5) and a movable mold (6) being provided above the base (2), and the movable mold (6) being located in front of the fixed mold (5); A top seat (101) is provided on the top of the support frame (1), a control panel (102) is provided on the front of the top seat (101), a blow moulding head (103) is provided on the bottom of the top seat (101), and the positions of the blow moulding head (103) correspond to the fixed mould (5) and the movable mould (6), and support plates (104) are provided on the left and right sides of the support frame (1), and the two support plates (104) are distributed in a symmetrical manner.
2. The blow molding and cooling integrated device for plastic packaging bottles according to claim 1, characterized in that: The base (2) is provided with a collecting tank (201) in the interior, a bottom plate (202) is provided at the rear of the collecting tank (201), and the bottom plate (202) corresponds to the position of the fixed mold (5) and the movable mold (6), through grooves (203) are provided on the left and right side walls of the base (2), a fixing plate (204) is provided in the interior of the base (2), a servo motor (205) is provided at the bottom of the fixing plate (204), and a first gear (206) is provided at the top end of the rotating shaft of the servo motor (205).
3. The blow molding and cooling integrated device for plastic packaging bottles according to claim 1, characterized in that: Two limiting slide bars (301) are respectively arranged on the outer sides of the two adjustment frames (3), first tooth plates (302) are respectively arranged on the inner sides of the two adjustment frames (3), and the two first tooth plates (302) are distributed in a centrally symmetrical manner, a docking sleeve (304) is arranged on the top of the adjustment frame (3), a connecting pipe (304) is arranged on the docking sleeve (304), and an air outlet (305) is arranged at the end of the connecting pipe (304).
4. The blow molding and cooling integrated device for plastic packaging bottles according to claim 3, characterized in that: The limiting sliding rod (301) of the adjustment frame (3) slides through the support plate (104), and the first tooth plate (302) slides into the through groove (203), and the first gear (206) is meshedly connected with the first tooth plate (302), and the air outlet (305) corresponds to the position of the fixed mold (5).
5. The integrated blow molding and cooling device for plastic packaging bottles according to claim 1, characterized in that: The push plate (4) is provided with two second tooth plates a (401) at the front, and the two second tooth plates a (401) are symmetrically distributed. The two second tooth plates a (401) are provided with guide sliders (402) on the opposite outer sides. The push plate (4) is provided with side plates (403) on the left and right sides, and the two side plates (403) are symmetrically distributed.
6. The blow molding and cooling integrated device for plastic packaging bottles according to claim 5, characterized in that: The two side plates (403) are provided with guide grooves (4031) on the inner sides thereof, and the second tooth plate a (401) is slidably connected to the guide grooves (4031) via a guide slider (402). A rotating sleeve (4032) is provided on the top of the side plate (403). A rotating shaft is rotatably installed in the rotating sleeve (4032), and a second gear (4033) is provided at the end of the rotating shaft, and the second gear (4033) is meshingly connected to the second tooth plate a (401).
7. The integrated blow molding and cooling device for plastic packaging bottles according to claim 1, characterized in that: A first fixing frame (501) is provided at the rear side of the fixed mold (5), and the first fixing frame (501) is fixedly connected to the base (2); four limiting sleeves (502) are provided at the front side of the first fixing frame (501), and the four limiting sleeves (502) are distributed in a rectangular array; two buffer seats (503) are provided between the fixed mold (5) and the first fixing frame (501), and the two buffer seats (503) are distributed in an upper and lower parallel manner; two sliding blocks (504) are provided on the buffer seat (503), and the two sliding blocks (504) are distributed in a symmetrical manner; a mounting plate (505) is provided in front of the buffer seat (503), and the mounting plate (505) is connected to the fixed mold (5).
8. The integrated blow molding and cooling device for plastic packaging bottles according to claim 7, characterized in that: The front portion of the buffer seat (503) is provided with a mounting slot (5031), and the middle portion of the top of the buffer seat (503) is provided with a U-shaped cavity (5032); A limited position through hole (5041) is provided on the sliding block (504); a support sleeve (5042) is provided on one sliding block (504); an insertion rod (5043) is provided on the other sliding block (504); and a compression spring (5044) is sleeved on the insertion rod (5043); Two positioning slide bars (5051) are provided on the rear side of the mounting plate (505), and the two positioning slide bars (5051) are distributed in a symmetrical manner.
9. The integrated blow molding and cooling device for plastic packaging bottles according to claim 8, characterized in that: The sliding block (504) is slidably connected to the buffer seat (503) via the mounting slot (5031), and the insertion rod (5043) is slidably inserted into the support sleeve (5042), and the compression spring (5044) is supported between the two sliding blocks (504), and the positioning sliding rod (5051) slides through the limiting through hole (5041).
10. The integrated blow molding and cooling device for plastic packaging bottles according to claim 1, characterized in that , The movable mold (6) is provided with a connecting plate (601) at the front, a second fixing frame (602) is provided at the rear of the connecting plate (601), and the second fixing frame (602) is fixedly connected to the base (2), a cylinder (603) is fixedly installed at the rear of the second fixing frame (602), and the end of the telescopic rod of the cylinder (603) is connected to the connecting plate (601), four limiting round rods (604) are provided at the rear of the connecting plate (601), and the limiting round rods (604) are slidably inserted into the limiting sleeve (502), and two second tooth plates b (605) are provided at the bottom of the movable mold (6), and the second tooth plates b (605) are meshingly connected to the second gear (4033).