A mold opening and closing structure for a plastic mold

Abstract

The application discloses a mold frame opening and closing structure for a plastic mold, relates to the technical field of mold frame opening and closing structures for plastic molds, and comprises a main unit which comprises a bearing plate and a supporting plate fixedly connected to the upper surface of the bearing plate, and the upper surface of the supporting plate is fixedly connected with a fixed plate; the plastic plate on the upper surface of the containing plate is pushed by the cooperation of the second electric push rod and the push plate through the pushing groove, when the plastic plate is pushed, the blocking plate rotates in the turnover groove, so that one side of the blocking plate fills the turnover groove, and the volute spring connected with the blocking plate is deformed at the same time, so that the plastic plate can be quickly reset after moving, when the plastic plate falls in the discharging groove, the plastic plate is in contact with the triangular plate on one side of the discharging groove, so that the plastic plate changes the moving direction when colliding, and the plastic plate falls along the edge of the extrusion protrusion in the second mold plate when falling, so that the plastic plate quickly reaches the designated position to a certain extent.

Description

A mold frame opening and closing structure for plastic molds Technical Field

[0001] This invention relates to the field of mold frame opening and closing structure technology for plastic molds, and more particularly to a mold frame opening and closing structure for plastic molds. Background Technology

[0002] Plastic products on the market come in various shapes and sizes, such as recessed designs on various surfaces. These recessed designs pose a certain technical challenge to product demolding. To ensure smooth demolding without damaging the product, the mold is generally divided into a fixed block and a mold cover. The mold cover and the fixed block together form the mold cavity. The mold cover is used to form the recessed design of the product. Before demolding, a hydraulic cylinder is used to lift the mold cover to prevent the mold cover from overlapping with the product, and then the mold is opened.

[0003] With the development of automated production technology, existing improvement solutions attempt to introduce actuators such as electric push rods and hydraulic cylinders to replace some mechanical structures. However, such solutions often result in large opening and closing impact forces and easy deformation of the template due to the rigid connection between the actuator and the template. The feeding process mostly relies on manual labor or independent robotic arms, resulting in low feeding positioning accuracy and poor stability of continuous feeding. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the mold frame opening and closing structure for plastic molds, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a mold frame opening and closing structure for plastic molds, which is suitable for solving the problems of large opening and closing impact force and easy deformation of the mold due to the rigid connection of the mold template; the feeding process mostly relies on manual or independent robotic arms, which has problems such as low feeding positioning accuracy and poor continuous feeding stability.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a mold frame opening and closing structure for a plastic mold, wherein the mold frame opening and closing of the plastic mold includes:

[0008] The main unit includes a load-bearing plate and a support plate fixedly connected to the upper surface of the load-bearing plate, wherein a fixing plate is fixedly connected to the upper surface of the support plate;

[0009] The feeding and pushing unit includes a connecting plate fixedly connected to one side of a load-bearing plate and a protective frame fixedly connected to the upper surface of the fixed plate. An L-shaped plate is fixedly connected to the upper surface of the connecting plate, a first electric push rod is fixedly connected to one side of the L-shaped plate, and a second electric push rod is fixedly connected to the inner surface of the fixed plate.

[0010] The sliding opening and closing unit includes a fixed plate with a drive motor fixedly connected to one side of the fixed plate via a base, and a lead screw connected to one end of the output shaft of the drive motor. A movable plate is threadedly connected to the outer surface of the lead screw, and a first template is fixedly connected to the lower surface of the movable plate. There are two sets of drive motors, and the two sets of drive motors are symmetrical about the center of the fixed plate.

[0011] As a preferred embodiment of the mold frame opening and closing structure for plastic molds described in this invention, the load-bearing plate has a sliding groove, the fixed plate has a moving groove, the outer surface of the moving plate is slidably connected to the inner surface of the moving groove, and a sealing plate is engaged with one side of the inner surface of the moving groove.

[0012] As a preferred embodiment of the mold frame opening and closing structure for plastic molds according to the present invention, wherein: a connecting block is slidably connected in the sliding groove, the upper surface of the connecting block is fixedly connected to the lower surface of the first template, there are several connecting blocks, and the several connecting blocks are symmetrical about the center of the load-bearing plate, and a second template is fixedly connected to the upper surface of the connecting block.

[0013] As a preferred embodiment of the mold frame opening and closing structure for plastic molds described in this invention, the connecting plate is fixedly connected to both sides of the connecting plate, a cooperating block is slidably connected inside the guide rail, and one side of the cooperating block is fixedly connected to one side of the L-shaped plate.

[0014] As a preferred embodiment of the mold frame opening and closing structure for plastic molds described in this invention, a servo motor is fixedly connected to the upper surface of the guide rail rod, a rotating rod is fixedly connected to one end of the output shaft of the servo motor, a cooperating block is rotatably connected to the outer surface of the rotating rod via a thread, and a push plate is fixedly connected to one end of the second electric push rod.

[0015] As a preferred embodiment of the mold frame opening and closing structure for plastic molds described in this invention, a holding plate is placed inside the protective frame, a plurality of plastic plates are evenly distributed on the upper surface of the holding plate, a flipping groove is provided on the upper surface of the holding plate, a blocking plate is rotatably connected to the flipping groove by a spiral spring, one side of the blocking plate is in contact with the plastic plate, and symmetrically distributed pushing grooves are provided on the lower surface of the holding plate.

[0016] As a preferred embodiment of the mold frame opening and closing structure for plastic molds described in this invention, the inner surface of the fixing plate is provided with a material feeding groove, and a triangular plate is fixedly connected in the material feeding groove.

[0017] As a preferred embodiment of the mold frame opening and closing structure for plastic molds described in this invention, the first template and the second template are engaged on one side, a stripping hook is inserted into the upper surface of the second template, and the other end of the stripping hook is fixedly connected inside the first template.

[0018] As a preferred embodiment of the mold frame opening and closing structure for plastic molds described in this invention, a connecting rod is inserted into the first template, the other end of the connecting rod is fixedly connected to one side of the second template, an auxiliary slide rod is fixedly connected to the moving groove, and the moving plate is slidably connected to the outer surface of the auxiliary slide rod.

[0019] The beneficial effects of this invention are:

[0020] 1. By utilizing a support plate, a fixed plate, a sliding groove, a connecting block, a sealing plate, and a moving groove, the sliding groove and the connecting block work together to allow the moving plate inside the moving groove to move simultaneously with the moving block moving within the sliding groove. At the same time, the fixed plate supports the feeding push unit, enabling the equipment to quickly process materials during production.

[0021] 2. Using a connecting plate, an L-shaped plate, a first electric push rod, a rotating rod, a servo motor, a guide rail, and a cooperating block, the holding plate is placed on the upper surface of the L-shaped plate, so that the pushing groove on the lower surface of the holding plate covers the first electric push rod, thereby causing the first electric push rod to push the holding plate, thus enabling the plastic plate to be quickly loaded. Furthermore, the servo motor drives the cooperating block to slide within the guide rail, thereby causing the L-shaped plate to move upward as a whole, thus facilitating the loading process of the equipment to a certain extent.

[0022] 3. Utilizing a pusher groove, a baffle plate, a tilting groove, a plastic sheet, a pusher plate, a second electric push rod, a triangular plate, and a feeding groove, the second electric push rod and the push plate work together to push the plastic sheet on the upper surface of the holding plate. When the plastic sheet is pushed, the baffle plate rotates in the tilting groove, causing one side of the baffle plate to fill the tilting groove. At the same time, the spiral spring connected to the baffle plate deforms, allowing the plastic sheet to quickly return to its original position after movement. When the plastic sheet falls into the feeding groove, it contacts the triangular plate on one side of the feeding groove, causing the plastic sheet to change its direction of travel upon impact. As the plastic sheet falls, it follows the edge of the extrusion protrusion inside the second template, thus quickly bringing the plastic sheet to the designated position to a certain extent.

[0023] 4. Utilizing a drive motor, auxiliary slide bar, lead screw, moving plate, first template, second template, connecting rod, and unloading hook, the drive motor drives the lead screw to rotate, thereby causing the moving plate to move during rotation. This allows the moving plates to move closer together or further apart, enabling the equipment to open and close quickly to a certain extent. Furthermore, as the unloading hook moves away from the pressed product during the equipment opening process, the first and second templates move further apart, allowing the raw material pressed against one side of the second template to be easily removed. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0025] Figure 1 is a schematic diagram of the overall structure of a mold frame opening and closing structure for plastic molds proposed in this invention;

[0026] Figure 2 is a schematic diagram of the L-shaped plate distribution structure of a mold frame opening and closing structure for plastic molds proposed in this invention;

[0027] Figure 3 is a schematic diagram of the push plate distribution structure of a mold frame opening and closing structure for plastic molds proposed in this invention;

[0028] Figure 4 is a schematic diagram of the plastic plate distribution structure of a mold frame opening and closing structure for plastic molds proposed in this invention;

[0029] Figure 5 is a schematic diagram of the internal structure of the load-bearing plate of a mold frame opening and closing structure for plastic molds proposed in this invention;

[0030] Figure 6 is a schematic diagram of a sliding opening and closing unit structure for a mold frame opening and closing structure for plastic molds proposed in this invention.

[0031] Figure Descriptions: 100. Main body unit; 101. Load-bearing plate; 102. Support plate; 103. Fixing plate; 104. Sliding groove; 105. Connecting block; 106. Sealing plate; 107. Moving groove; 200. Feeding and pushing unit; 201. Protective frame; 202. Connecting plate; 203. L-shaped plate; 204. First electric push rod; 205. Rotating rod; 206. Servo motor; 207. Guide rail rod; 208. Coordinating block; 20 9. Holding plate; 210. Pushing groove; 211. Obstruction plate; 212. Tilting groove; 213. Plastic plate; 214. Push plate; 215. Second electric push rod; 300. Sliding opening and closing unit; 301. Drive motor; 302. Auxiliary slide rod; 303. Lead screw; 304. Triangular plate; 305. Moving plate; 306. Discharge chute; 307. First template; 308. Second template; 309. Connecting rod; 310. Unloading hook. Detailed Implementation

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive, either alone or selectively, with other embodiments.

[0035] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure will be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included. Embodiment 1:

[0036] Referring to Figures 1-6, an embodiment of the present invention provides a mold frame opening and closing structure for a plastic mold, including a main body unit 100, a feeding and pushing unit 200, and a sliding opening and closing unit 300.

[0037] The main unit 100 includes a load-bearing plate 101 and a support plate 102 fixedly connected to the upper surface of the load-bearing plate 101, and a fixing plate 103 fixedly connected to the upper surface of the support plate 102.

[0038] Furthermore, the feeding and pushing unit 200 includes a connecting plate 202 fixedly connected to one side of the load-bearing plate 101 and a protective frame 201 fixedly connected to the upper surface of the fixed plate 103. An L-shaped plate 203 is fixedly connected to the upper surface of the connecting plate 202. A first electric push rod 204 is fixedly connected to one side of the L-shaped plate 203. A second electric push rod 215 is fixedly connected to the inner surface of the fixed plate 103.

[0039] Finally, the sliding opening and closing unit 300 includes a drive motor 301 fixedly connected to one side of the fixed plate 103 via a base, and a lead screw 303 connected to one end of the output shaft of the drive motor 301. A movable plate 305 is threadedly connected to the outer surface of the lead screw 303, and a first template 307 is fixedly connected to the lower surface of the movable plate 305. There are two sets of drive motors 301, and both sets of drive motors 301 are symmetrical about the center of the fixed plate 103.

[0040] Furthermore, a sliding groove 104 is provided in the load-bearing plate 101, and a moving groove 107 is provided in the fixed plate 103. The outer surface of the moving plate 305 is slidably connected to the inner surface of the moving groove 107. A sealing plate 106 is engaged with one side of the inner surface of the moving groove 107. A connecting block 105 is slidably connected in the sliding groove 104. The upper surface of the connecting block 105 is fixedly connected to the lower surface of the first template 307. There are several connecting blocks 105, and all of them are symmetrical about the center of the load-bearing plate 101. A second template 308 is fixedly connected to the upper surface of the connecting block 105. Through the cooperation of the moving groove 107 and the sliding groove 104, the first template 307 and the second template 308 can be quickly opened and closed. Furthermore, the engaging sealing plate 106 allows the moving plate 305 to be removed for maintenance to a certain extent.

[0041] Furthermore, guide rails 207 are fixedly connected to both sides of the connecting plate 202. A cooperating block 208 is slidably connected inside the guide rails 207. One side of the cooperating block 208 is fixedly connected to one side of the L-shaped plate 203. A servo motor 206 is fixedly connected to the upper surface of the guide rails 207. A rotating rod 205 is fixedly connected to one end of the output shaft of the servo motor 206. The cooperating block 208 is rotatably connected to the outer surface of the rotating rod 205 through a thread. A push plate 214 is fixedly connected to one end of the second electric push rod 215. The servo motor 206 drives the cooperating block 208 to move, so that the cooperating block 208 simultaneously lifts the L-shaped plate 203 on one side during the upward process, so that the plastic sheet 213 is fed as a whole.

[0042] Furthermore, a holding plate 209 is placed inside the protective frame 201. Several plastic plates 213 are evenly distributed on the upper surface of the holding plate 209. A flipping groove 212 is opened on the upper surface of the holding plate 209. A blocking plate 211 is rotatably connected to the flipping groove 212 through a spiral spring. One side of the blocking plate 211 contacts the plastic plate 213. A symmetrically distributed pushing groove 210 is opened on the lower surface of the holding plate 209. The blocking plate 211 connected by the spiral spring can be reset with the assistance of the spiral spring after the plastic plate 213 moves, so that it can quickly contact the plastic plate 213 behind it.

[0043] Working principle:

[0044] By utilizing the support plate 102, the fixed plate 103, the sliding groove 104, the connecting block 105, the sealing plate 106, and the moving groove 107, the sliding groove 104 and the connecting block 105 cooperate with each other, so that the moving plate 305 inside the moving groove 107 can move the connecting block 105 in the sliding groove 104 simultaneously during the movement of the moving plate 305. At the same time, the fixed plate 103 supports the feeding push unit 200, so that the equipment can quickly perform feeding processing during the production process.

[0045] Using the connecting plate 202, L-shaped plate 203, first electric push rod 204, rotating rod 205, servo motor 206, guide rail 207 and cooperating block 208, the holding plate 209 is placed on the upper surface of the L-shaped plate 203, so that the pushing groove 210 on the lower surface of the holding plate 209 covers the first electric push rod 204, so that the first electric push rod 204 pushes the holding plate 209, thereby enabling the plastic plate 213 to be quickly loaded. Furthermore, the servo motor 206 drives the cooperating block 208 to slide in the guide rail 207, thereby causing the L-shaped plate 203 to move upward as a whole, thus making it easier for the equipment to load materials to a certain extent.

[0046] Utilizing a push groove 210, a baffle plate 211, a tilting groove 212, a plastic sheet 213, a push plate 214, a second electric push rod 215, a triangular plate 304, and a discharge groove 306, the second electric push rod 215, in cooperation with the push plate 214, pushes the plastic sheet 213 on the upper surface of the holding plate 209. When the plastic sheet 213 is pushed, the baffle plate 211 rotates within the tilting groove 212, thereby filling the tilting groove 212 on one side of the baffle plate 211. At the same time, the spiral spring connected to the obstruction plate 211 deforms, so that the plastic plate 213 can be quickly reset after moving. When the plastic plate 213 falls into the feeding trough 306, it comes into contact with the triangular plate 304 on one side of the feeding trough 306, so that the plastic plate 213 will change its direction of travel when it collides, and the plastic plate 213 will fall along the edge of the extrusion protrusion inside the second template 308 when it falls, so that the plastic plate 213 can reach the designated position quickly to a certain extent.

[0047] Utilizing a drive motor 301, auxiliary slide bar 302, lead screw 303, moving plate 305, first template 307, second template 308, connecting rod 309, and unloading hook 310, the drive motor 301 drives the lead screw 303 to rotate, thereby causing the lead screw 303 to move the moving plate 305 during rotation. This causes the moving plates 305 to move closer together or further apart, allowing the equipment to open and close quickly to a certain extent. Furthermore, as the unloading hook 310 moves away from the pressed product during the equipment opening process, the first template 307 and the second template 308 move further apart, allowing the raw material pressed against one side of the second template 308 to be easily removed. Example 2:

[0048] Referring to Figures 5-6, the difference from Embodiment 1 is that: a material discharge groove 306 is provided on the inner surface of the fixing plate 103, and a triangular plate 304 is fixedly connected in the material discharge groove 306. The first template 307 and the second template 308 are engaged with each other on one side. A material release hook 310 is inserted into the upper surface of the second template 308, and the other end of the material release hook 310 is fixedly connected in the first template 307. The triangular plate 304 collides with the falling plastic plate 213, thereby changing the falling direction of the plastic plate 213, so that it can fall into the first template 307 and the second template 308 quickly to a certain extent.

[0049] Furthermore, a connecting rod 309 is inserted into the first template 307, and the other end of the connecting rod 309 is fixedly connected to one side of the second template 308. An auxiliary slide rod 302 is fixedly connected in the moving groove 107, and a moving plate 305 is slidably connected to the outer surface of the auxiliary slide rod 302. The movement of the moving plate 305 synchronously drives the first template 307 or the second template 308 to move. At the same time, the first template 307 or the second template 308 can be moved separately by the symmetrically arranged lead screws 303.

[0050] Working principle: First, the feeding process begins by placing the holding plate 209, which is stacked with several plastic plates 213, on the plane of the L-shaped plate 203 of the feeding push unit 200. At this time, the push groove 210 on the lower surface of the holding plate 209 is exactly aligned with the push rod end of the first electric push rod 204. After the equipment is started, the servo motor 206 drives the rotating rod 205 to rotate. Since the cooperating block 208 is connected to the rotating rod 205 by threads and is constrained by the guide rail rod 207, the cooperating block 208 moves precisely vertically along the guide rail rod 207. The upward movement of the cooperating block 208 synchronously drives the L-shaped plate 203 fixed therewith and the holding plate 209 supported thereon to be lifted as a whole until the top plastic plate 213 is aligned with the horizontal height of the second electric push rod 215 in the fixed plate 103, thus completing the initial positioning of the feeding height.

[0051] Simultaneously, the second electric push rod 215 starts working, and its telescopic shaft pushes the push plate 214 to move horizontally. The push plate 214 contacts the side edge of the top plastic plate 213 and pushes it forward. As the plastic plate 213 is pushed away from its original position, its side edge presses against the obstruction plate 211 on the holding plate 209, causing the obstruction plate 211 to overcome the torque of the spiral spring and rotate in the flipping groove 212. When the plastic plate 213 is completely pushed away, the obstruction plate 211 quickly rotates back to the initial vertical state under the reset action of the spiral spring, effectively blocking the subsequent plastic plates 213 from moving forward, thereby ensuring that only one plastic plate 213 is pushed at a time, realizing single-piece orderly feeding.

[0052] The plastic sheet 213 is pushed out and falls through the feeding groove 306 of the fixed plate 103. During the falling process, the plastic sheet 213 contacts and collides with the inclined surface of the triangular plate 304 fixedly connected in the feeding groove 306. The guiding effect of the triangular plate 304 forces the plastic sheet 213 to change its original falling trajectory, so that it slides along the edge of the pre-set extrusion protrusion inside the second template 308 into the designated position of the cavity between the first template 307 and the second template 308. This guiding structure ensures the accurate placement of the plastic sheet 213 during the feeding process, laying a precise positioning foundation for subsequent compression molding.

[0053] The movable plate 305 forms a screw nut with the lead screw 303 through its internal threaded hole. At the same time, the sliding part of the movable plate 305 forms a sliding engagement with the auxiliary slide rod 302 in the movable groove 107. This design converts the rotational motion of the lead screw 303 into the precise and stable linear motion of the movable plate 305. Since the lower surface of the movable plate 305 is fixedly connected to the first template 307, and the first template 307 is connected to the second template 308 below through the connecting block 105, and the connecting block 105 is also embedded in the sliding groove 104 of the load-bearing plate 101, a stable multi-point linkage mechanism is formed.

[0054] When the two sets of drive motors 301 synchronously drive the lead screw 303, causing the two moving plates 305 to move towards each other, the first template 307 and the second template 308 close smoothly. The closing action of the template is precisely controlled by the lead screw 303, avoiding the impact caused by rigid drive and effectively preventing the template from deforming due to instantaneous strong impact. The first template 307 and the second template 308 achieve precise mold alignment through a mutual interlocking structure on one side, ensuring the mold closing accuracy. After mold closing, the plastic plate 213 is subjected to hot pressing in the cavity. After molding, the drive motor 301 rotates in the opposite direction, driving the two moving plates 305 to move in opposite directions. The first template 307 and the second template 308 separate. During the mold opening process, the ejector hook 310 fixedly connected in the first template 307 moves accordingly. Since the other end of the ejector hook 310 is inserted into the second template 308, as the two templates separate, the ejector hook 310 scrapes off the molded product fitted on the protrusion of the second template 308, realizing automatic demolding and completing the entire molding cycle.

[0055] Finally, after completing one cycle of demolding, the feeding push unit 200 can perform the next feeding operation. The first electric push rod 204 can be activated, and its telescopic shaft pushes out and inserts into the push groove 210 at the bottom of the holding plate 209, pushing the holding plate 209 forward one station, so that the next plastic plate 213 enters the push-ready state, preparing for continuous automated production.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A mold frame opening and closing structure for plastic molds, characterized in that, The mold frame opening and closing mechanism of the plastic mold includes: a main body unit (100), which includes a load-bearing plate (101) and a support plate (102) fixedly connected to the upper surface of the load-bearing plate (101), wherein a fixed plate (103) is fixedly connected to the upper surface of the support plate (102); and a feeding and pushing unit (200), which includes a connecting plate (202) fixedly connected to one side of the load-bearing plate (101) and a protective frame (201) fixedly connected to the upper surface of the fixed plate (103), wherein an L-shaped plate (203) is fixedly connected to the upper surface of the connecting plate (202), and a first electric push rod is fixedly connected to one side of the L-shaped plate (203). 204), a second electric push rod (215) is fixedly connected to the inner surface of the fixed plate (103), and guide rail rods (207) are fixedly connected to both sides of the connecting plate (202). A cooperating block (208) is slidably connected inside the guide rail rod (207). One side of the cooperating block (208) is fixedly connected to one side of the L-shaped plate (203). A servo motor (206) is fixedly connected to the upper surface of the guide rail rod (207). A rotating rod (205) is fixedly connected to one end of the output shaft of the servo motor (206). The cooperating block (208) is rotatably connected to the outer surface of the rotating rod (205) by a thread. A push plate (214) is fixedly connected to one end of the second electric push rod (215). A holding plate (209) is placed inside the protective frame (201). Several plastic plates (213) are evenly distributed on the upper surface of the holding plate (209). A flip groove (212) is opened on the upper surface of the holding plate (209). A baffle plate (211) is rotatably connected to the flip groove (212) through a spiral spring. One side of the baffle plate (211) is in contact with the plastic plate (213). A push groove (210) is symmetrically distributed on the lower surface of the holding plate (209). A sliding opening and closing unit (300) includes a fixed plate. (103) A drive motor (301) and a lead screw (303) connected to one end of the output shaft of the drive motor (301) are fixedly connected to one side via a base. A movable plate (305) is threadedly connected to the outer surface of the lead screw (303). A first template (307) is fixedly connected to the lower surface of the movable plate (305). There are two sets of drive motors (301), and both sets of drive motors (301) are symmetrical about the center of the fixed plate (103). A feeding groove (306) is opened on the inner surface of the fixed plate (103). A triangular plate (304) is fixedly connected in the feeding groove (306).

2. The mold frame opening and closing structure for plastic molds according to claim 1, characterized in that: The load-bearing plate (101) has a sliding groove (104) and the fixed plate (103) has a moving groove (107). The outer surface of the moving plate (305) is slidably connected to the inner surface of the moving groove (107). A sealing plate (106) is engaged with one side of the inner surface of the moving groove (107).

3. The mold frame opening and closing structure for plastic molds according to claim 2, characterized in that: A connecting block (105) is slidably connected in the sliding groove (104). The upper surface of the connecting block (105) is fixedly connected to the lower surface of the first template (307). There are several connecting blocks (105), and all of the connecting blocks (105) are symmetrical about the center of the load-bearing plate (101). A second template (308) is fixedly connected to the upper surface of the connecting block (105).

4. The mold frame opening and closing structure for plastic molds according to claim 3, characterized in that: The first template (307) and the second template (308) are engaged on one side. A material release hook (310) is inserted into the upper surface of the second template (308), and the other end of the material release hook (310) is fixedly connected inside the first template (307).

5. The mold frame opening and closing structure for plastic molds according to claim 4, characterized in that: A connecting rod (309) is inserted into the first template (307), and the other end of the connecting rod (309) is fixedly connected to one side of the second template (308). An auxiliary slide rod (302) is fixedly connected in the moving groove (107), and the moving plate (305) is slidably connected to the outer surface of the auxiliary slide rod (302).

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