An automatic injection molding machine for producing plastic copper-foot buttons

Abstract

The present application discloses an automatic injection molding machine for producing plastic copper-foot buttons, which relates to the technical field of injection molding machines, and includes a frame, an injection mechanism, a driving mechanism, a molding mechanism and an ejection mechanism, wherein the molding mechanism includes a mold fixing plate, a first half mold, a second half mold, a moving seat, a fixed column and a mold moving plate; the first half mold is fixed to the right side of the mold fixing plate; the moving seat is fixed to the left end of a crank arm in the driving mechanism; the second half mold is fixed to the left side of the moving seat; the mold moving plate is fixed to the output end of an oil cylinder in the driving mechanism; there are four fixed columns arranged transversely, and all are radially slidably connected to the mold moving plate inside thereof, and are used to fix, clamp and position the first half mold and the second half mold; the first half mold and the second half mold can be disassembled and assembled without manual participation throughout the process, the labor intensity is low, and it is conducive to mechanical automated production, and the loosening or displacement phenomenon that causes inaccurate positioning is avoided during use, and the processing accuracy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding machines, in particular to an automatic injection molding machine for producing plastic copper-foot buttons. Background Art

[0002] Plastic copper-foot buttons are a common clothing accessory, usually used for decoration of clothing, bags and shoes. As fasteners of clothing, buttons are essential for the convenience of wearing and using. Plastic copper-foot buttons are usually manufactured by injection molding, injecting molten plastic through a mold, allowing it to cool and solidify in the mold to form the base of the plastic button. High-quality plastic copper-foot buttons can ensure that the buttons are strong and durable, easy to button and easy to unbutton, and improve the comfort and convenience of clothing.

[0003] In response to the above problems, a Chinese invention patent with patent number CN112936752B discloses an automatic injection molding machine, in which a clamping mechanism is provided on one side of the upper end face of the frame and an injection mechanism is provided on the other side; the invention enables the first half mold to be quickly disassembled and assembled with the mold movable seat and the second half mold to be quickly disassembled and assembled with the mold fixed seat through the first linear bearing and the second linear bearing; a button cavity and an injection main channel are formed by clamping the first half mold and the second half mold, and at the same time, the plasticized plastic can be sequentially passed through the nozzle, the injection main channel, and each channel into each button cavity at a certain speed and pressure through the injection mechanism. Through the above arrangement, multiple button blanks can be integrally injected and molded, thereby improving the rapid production efficiency of button blanks.

[0004] Although the above scheme is relatively convenient to operate and can realize the integrated injection molding of multiple button blanks, which saves production costs and improves production efficiency to a certain extent; however, the fixation of the first half mold and the second half mold of the invention is relatively poor, and the fixing and disassembly process by bolts and nuts requires full manual participation, and the stability is poor during operation, and loosening or displacement is prone to occur, which affects the accurate positioning and processing accuracy of the first half mold and the second half mold, and the labor intensity is high and is not conducive to mechanical automation production. Summary of the invention

[0005] The present application provides an automatic injection molding machine for the production of plastic copper-foot buttons, thereby solving the technical problems in the prior art that the first half mold and the second half mold of the injection molding machine require full manual participation in the fixing and disassembly process, and the fixation and stability are poor during the injection molding process, the labor intensity is high and it is not conducive to mechanical automation production, and the loosening or displacement phenomenon is prone to occur during use, resulting in inaccurate positioning; the application achieves the technical effect that the first half mold and the second half mold do not require full manual participation in the disassembly and assembly process, the labor intensity is low and it is conducive to mechanical automation production, the loosening or displacement phenomenon that causes inaccurate positioning is avoided during use, and the processing accuracy is improved.

[0006] The present application provides an automatic injection molding machine for producing plastic copper-foot buttons, comprising a frame, an injection mechanism for injecting molten plastic into a mold cavity, a driving mechanism for pushing the mold to close the mold, a molding mechanism for cooling and solidifying the molten plastic in the mold cavity, and an ejection mechanism for pushing the molded parts out of the mold, wherein four guide columns are fixed between a power mounting seat in the driving mechanism and a mold fixing plate in the molding mechanism;

[0007] The molding mechanism comprises a mold fixing plate, a first half mold, a second half mold, a moving seat, a fixing column and a mold moving plate;

[0008] The mold fixing plate is fixed on the frame through guide columns, and is used to support, fix and limit the first half mold;

[0009] The first half mold is fixed on the right side of the mold fixing plate;

[0010] The movable seat is fixed to the left end of the crank arm in the driving mechanism and slides outside the guide column, and is used to drive the second half mold to move and close the mold with the first half mold;

[0011] The second half mold is fixed on the left side of the movable seat and is used to mold the molten plastic after being molded with the first half mold;

[0012] The mold moving plate is fixed to the output end of the oil cylinder in the driving mechanism and slides on the outside of the guide column, and is used to drive the moving seat to move through the crank arm under the action of the driving mechanism;

[0013] There are four fixed columns in number and they are arranged horizontally. They are all connected to the inside of the mold moving plate along the radial sliding direction of the mold moving plate. They are located radially outside the first half mold and the second half mold, and the left and right ends of the fixed columns extend to the left side of the mold fixing plate and the right side of the mold moving plate respectively, so as to fix, clamp and position the first half mold and the second half mold.

[0014] Furthermore, the first half mold and the second half mold are each provided with a position groove cooperating with the fixing column at four right angles. The position groove is an arc structure of one quarter of the circumference of the fixing column, and is used to provide a clamping position for the fixing column to clamp and position the first half mold and the second half mold.

[0015] Furthermore, the arc surface of the mold fixing plate and the movable seat is evenly provided with a plurality of movable groove groups along its circumference, each movable groove group includes four evenly arranged movable grooves, the movable groove depths of each movable groove group are different and the movable grooves of each movable groove group are staggered, so as to limit and guide the movement of the fixed column.

[0016] Furthermore, each of the fixing columns is a hollow cylindrical structure and is internally connected with an elastic rope, and each of the elastic ropes is connected to each other to drive the four fixing columns to move synchronously and ensure uniform pressure.

[0017] Furthermore, a surface of the second half mold close to the first half mold is evenly fixed with protrusions along its four edges, and the cross section of the protrusions is an arc structure.

[0018] Furthermore, arc-shaped grooves matching with the protrusions are evenly formed along the edges of the first half mold on a surface close to the second half mold, so as to further position the first half mold and the second half mold when they are molded together.

[0019] Furthermore, an electromagnet is fixed in the middle of the right side of the mold moving plate, and the electromagnet is a cylindrical structure.

[0020] Furthermore, a drawstring is commonly sleeved on the outer sides of the four fixed columns. The drawstring is a flexible circular ring structure and is used to cooperate with the electromagnet to drive the four fixed columns to gather and expand synchronously, thereby clamping and fixing the first half mold and the second half mold.

[0021] Furthermore, T-shaped blocks matching the electromagnet are evenly arranged on one side of the pull belt close to the electromagnet and along the circumference of the electromagnet. The end of the T-shaped block close to the electromagnet is an arc-shaped structure made of metal copper, which is used to fit the magnetic field structure of the electromagnet to ensure uniform force.

[0022] Furthermore, a plurality of cavities are evenly arranged inside the drawstring along its circumference, and an equal amount of iron powder is filled in every two cavities spaced at equal intervals, so as to ensure that the tension exerted on the contact surface of the drawstring with the fixed columns at different positions during the pulling process remains uniform.

[0023] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0024] By optimizing and improving the fixing method of the first half mold and the second half mold in the prior art, the first half mold and the second half mold are flexibly clamped and fixed by moving the fixing column and adopting a mobile clamping method, and at the same time, different depth position grooves are set to adapt to the fixation of half molds of different specifications and sizes, which is beneficial to the maintenance, maintenance and replacement of the half molds, and expands the scope of application of the present invention. It effectively solves the technical problems in the prior art that the first half mold and the second half mold need to be manually participated in the fixing and disassembly process, and the fixation and stability are poor in the injection molding process, the labor intensity is high and it is not conducive to mechanical automation production, and the loosening or displacement phenomenon is easy to occur during use, resulting in inaccurate positioning; the first half mold and the second half mold do not need to be manually participated in the disassembly and assembly process, the labor intensity is low and it is conducive to mechanical automation production, and the loosening or displacement phenomenon that causes inaccurate positioning is avoided during use, and the processing accuracy is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1The present invention is a front view of the three-dimensional structure of an automatic injection molding machine for producing plastic copper-foot buttons.

[0026] Figure 2 The present invention is a three-dimensional structural schematic diagram of a molding mechanism of an automatic injection molding machine for producing plastic copper-foot buttons.

[0027] Figure 3 The present invention is a schematic diagram of the lateral stereoscopic structure of a molding mechanism of an automatic injection molding machine for producing plastic copper-leg buttons.

[0028] Figure 4 The present invention is a schematic diagram of the three-dimensional structure of the first half mold of an automatic injection molding machine for producing plastic copper-foot buttons.

[0029] Figure 5 The present invention is a schematic diagram of the three-dimensional structure of the second half mold of an automatic injection molding machine for producing plastic copper-leg buttons.

[0030] Figure 6 The present invention is a schematic diagram of the three-dimensional structure of a second half mold and a movable base of an automatic injection molding machine for producing plastic copper-leg buttons in a state of being clamped by a fixed column.

[0031] Figure 7 The present invention is a three-dimensional structural back view of a molding mechanism of an automatic injection molding machine for producing plastic copper-foot buttons.

[0032] Figure 8 The present invention is a full cross-sectional view of a drawstring, a fixing column and an electromagnet of an automatic injection molding machine for producing plastic copper-foot buttons.

[0033] In the figure: 100, frame; 110, guide column; 120, position slot; 130, moving slot; 140, elastic rope; 150, drawstring; 151, T-block; 152, iron powder; 200, injection mechanism; 300, driving mechanism; 400, molding mechanism; 410, mold fixing plate; 420, first half mold; 421, groove; 430, second half mold; 431, protrusion; 440, moving seat; 460, fixed column; 470, mold moving plate; 471, electromagnet; 500, ejection mechanism. DETAILED DESCRIPTION

[0034] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0035] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0037] See also Figure 1 , which is a front view of the appearance structure of an automatic injection molding machine for producing plastic copper-foot buttons of the present invention; the present application optimizes and improves the fixing method of the first half mold 420 and the second half mold 430 in the prior art, and flexibly clamps and fixes the first half mold 420 and the second half mold 430 by moving the fixing column 460 and adopting a mobile clamping method. At the same time, different depth position grooves 120 are set to adapt to the fixation of half molds of different specifications and sizes, which is beneficial to the maintenance, maintenance and replacement of the half molds, expands the scope of application of the present invention, and realizes that the first half mold 420 and the second half mold 430 do not require manual participation in the entire process of disassembly and assembly, has low labor intensity and is conducive to mechanical automation production, avoids loosening or displacement during use, and causes inaccurate positioning and improves processing accuracy. Technical effect.

[0038] Embodiment 1: Figure 1-Figure 3 As shown, the present application is an automatic injection molding machine for producing plastic copper-foot buttons, comprising a frame 100, an injection mechanism 200 for injecting molten plastic into a mold cavity, a driving mechanism 300 for pushing the mold to close the mold, a molding mechanism 400 for cooling and solidifying the molten plastic in the mold cavity, and an ejection mechanism 500 for pushing the molded parts out of the mold, and four guide columns 110 are fixed between the power mounting seat in the driving mechanism 300 and the mold fixing plate 410 in the molding mechanism 400;

[0039] The molding mechanism 400 includes a mold fixing plate 410, a first half mold 420, a second half mold 430, a moving seat 440, a fixing column 460 and a mold moving plate 470;

[0040] The mold fixing plate 410 is fixed on the frame 100 through the guide column 110, and is used to support, fix and limit the first half mold 420;

[0041] The first half mold 420 is fixed on the right side of the mold fixing plate 410;

[0042] The movable seat 440 is fixed to the left end of the curved arm in the driving mechanism 300 and slides outside the guide column 110, and is used to drive the second half mold 430 to move and close the mold with the first half mold 420;

[0043] The second half mold 430 is fixed on the left side of the movable seat 440 and is used to mold the molten plastic after being molded with the first half mold 420;

[0044] The mold moving plate 470 is fixed to the output end of the oil cylinder in the driving mechanism 300 and slides outside the guide column 110, and is used to drive the moving seat 440 to move through the crank arm under the action of the driving mechanism 300;

[0045] There are four fixed columns 460 arranged transversely, all of which are radially slidably connected to the inside of the mold moving plate 470 along the radial direction, located radially outside the first half mold 420 and the second half mold 430, and the left and right ends of the fixed columns 460 extend to the left side of the mold fixing plate 410 and the right side of the mold moving plate 470 respectively, for fixing, clamping and positioning the first half mold 420 and the second half mold 430.

[0046] like Figure 4 and Figure 5 As shown, position grooves 120 cooperating with the fixing column 460 are provided at four right angles of the first half mold 420 and the second half mold 430. The position groove 120 is an arc structure of one-quarter of the circumference of the fixing column 460, and is used to provide a clamping position for the fixing column 460 to clamp and position the first half mold 420 and the second half mold 430. The contact surface between the position groove 120 and the fixing column 460 is provided with a magnetic material cooperating with the material of the fixing column 460, and is used to ensure that the fixing column 460 and the position groove 120 are quickly placed in place.

[0047] like Figure 2 and Figure 3 As shown, the arc surfaces of the mold fixing plate 410 and the movable seat 440 are evenly provided with a plurality of movable groove groups along their circumferences, each movable groove group includes four evenly arranged movable grooves 130, the groove depths of the movable grooves 130 of each movable groove group are different and the movable grooves 130 of each movable groove group are staggered, so as to limit and guide the movement of the fixed column 460.

[0048] The injection mechanism 200 is used to inject molten plastic or other materials into the mold cavity, and mainly includes an injection cylinder, a screw, a nozzle, a heating system and a cooling system, and is preferably driven by a hydraulic motor and a cylinder group; the driving mechanism 300 includes a crank arm, which is used to connect the driving mechanism 300 and the molding mechanism 400, and is used to push the second half mold 430 to move and close the mold with the first half mold 420, and also push the ejection mechanism 500 to move and drive the second half mold 430 back to its original position. At the same time, when the second half mold 430 returns to its original position, the molded plastic button in the second half mold 430 can be demolded by the ejector pin in the ejection mechanism 500 under the action of the ejection mechanism 500, and is preferably driven by a cylinder and controlled in real time by a programmable controller; all of them are prior art and will not be described in detail here.

[0049] During actual operation of the embodiment of the present application: first, the first half mold 420 and the second half mold 430 are placed in the frame 100 by manual or automated equipment, the positions of the mold fixing plate 410 and the movable seat 440 are adjusted according to the specifications of the half molds, and the position grooves 120 with appropriate depths are selected to cooperate with the fixing columns 460, and the fixing columns 460 are moved so that the four fixing columns 460 can fit with the position grooves 120 on the first half mold 420 and the second half mold 430, so as to position and clamp the first half mold 420 and the second half mold 430, and the driving mechanism 300 is started to drive the movable seat 440, the second half mold 430 and the ejection mechanism 500 to move until the second half mold 430 and the first half mold 420 are molded together, and the injection mechanism 200 is started to inject the molten plastic into the first half mold 420. The molding cavity between the half mold 420 and the second half mold 430 is cooled by the cooling system in the injection mechanism 200, so that the injected molten plastic is solidified into a button molded part. Then, the driving mechanism 300 is started to drive the movable seat 440, the second half mold 430 and the ejection mechanism 500 to move in a direction away from the first half mold 420. The ejection mechanism 500 stops moving and returns to its original position under the action of the limit. At this time, the second half mold 430 and the movable seat 440 continue to move in a direction away from the first half mold 420 under the drive of the driving mechanism 300. The button molded part in the second half mold 430 is ejected by the ejector pin in the ejection mechanism 500, so that the button molded part is demolded. Finally, the movable seat 440 and the second half mold 430 are driven by the driving mechanism 300 to return to their original position.

[0050] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0051] Compared with the prior art, in this embodiment, by optimizing and improving the fixing method of the first half mold 420 and the second half mold 430 in the prior art, the first half mold 420 and the second half mold 430 are flexibly clamped and fixed by moving the fixing column 460 and adopting a mobile clamping method, and at the same time, position grooves 120 of different depths are set to adapt to the fixation of half molds of different specifications and sizes, which is beneficial to the maintenance, maintenance and replacement of the half molds, expands the scope of application of the present invention, and realizes the first half mold 420 and the second half mold 430. The assembly and disassembly process does not require manual participation throughout the process, the labor intensity is low, and it is conducive to mechanical automated production, and the loosening or displacement phenomenon that causes inaccurate positioning during use is avoided, and the processing accuracy is improved. Technical effect.

[0052] Embodiment 2: In order to further improve the mobile clamping effect of the fixed column 460 on the first half mold 420 and the second half mold 430 and the mold closing and positioning effect of the first half mold 420 and the second half mold 430, the present application proposes the following technical solutions to optimize and improve the structures of the fixed column 460, the first half mold 420 and the second half mold 430 to improve the mobile overall injection molding effect, specifically:

[0053] like Figure 3 and Figure 6 As shown, each of the fixing columns 460 is a hollow cylindrical structure and is internally connected with an elastic rope 140 . Each of the elastic ropes 140 is interconnected to drive the four fixing columns 460 to move synchronously and ensure uniform pressure.

[0054] The second half mold 430 has a surface close to the first half mold 420 and protrusions 431 evenly fixed along the edges thereof. The cross section of the protrusions 431 is an arc structure.

[0055] A side of the first mold half 420 close to the second mold half 430 is evenly provided with arc grooves 421 matched with the protrusions 431 along its four edges, which are used to further position the first mold half 420 and the second mold half 430 when they are molded together; by respectively providing arc-shaped protrusions 431 and arc-shaped grooves 421 matched with them on the surfaces of the first mold half 420 and the second mold half 430, it can be further ensured that the first mold half 420 and the second mold half 430 are accurately positioned during the mold closing process due to the guiding effect of the protrusions 431 and the arc-shaped grooves 421.

[0056] By changing the structure of the fixed column 460 from a solid structure to a hollow structure and connecting the four fixed columns 460 together through an elastic rope 140, the four fixed columns 460 can be moved synchronously under force through the elastic rope 140. At the same time, a flexible pressure method can ensure uniform force, thereby preventing the fixed column 460 on one side from being unevenly stressed, causing inaccurate overall movement of the four fixed columns 460, thereby causing inaccurate positioning and affecting button injection molding production.

[0057] Embodiment 3: In order to further better control the moving and positioning effect of the fixed column 460, ensure that the four fixed columns 460 move synchronously and position and clamp the first half mold 420 and the second half mold 430, the embodiment of the present application is additionally provided with a drawstring 150 and an electromagnet 471 on the basis of the above embodiment, specifically:

[0058] like Figure 7 As shown, an electromagnet 471 is fixed in the middle of the right side of the mold moving plate 470, and the electromagnet 471 is a cylindrical structure.

[0059] A drawstring 150 is commonly sleeved on the outside of the four fixed columns 460. The drawstring 150 is a flexible circular ring structure made of magnetic material and is used to cooperate with the electromagnet 471 to drive the four fixed columns 460 to gather and expand synchronously, thereby clamping and fixing the first half mold 420 and the second half mold 430.

[0060] By controlling the on and off of the internal current of the electromagnet 471 and fixing the moving position of the fixed column 460 by bundling, it is possible to more conveniently control the tightening and releasing of the drawstring 150 by controlling the electromagnet 471, thereby achieving synchronous and precise positioning control of the fixed columns 460 at four different positions; at the same time, the electromagnet 471 has a fast response speed to the tightening and releasing of the drawstring 150, and the positioning operation can be completed in a short time, further improving work efficiency.

[0061] Embodiment 4: In order to further ensure that the drawstring 150 can be evenly stressed when pulling the fixed column 460 to move, and to improve the magnetic attraction effect of the electromagnet 471 on the drawstring 150, the embodiment of the present application adds a T-block 151 on the basis of the above embodiment, specifically:

[0062] like Figure 6 and Figure 7 As shown, the pull belt 150 is close to the electromagnet 471 and is evenly provided with T-blocks 151 matching the electromagnet 471 along the circumference of the electromagnet 471. The end of the T-block 151 close to the electromagnet 471 is an arc-shaped structure and made of metal copper, which is used to fit the magnetic field structure of the electromagnet 471 to ensure uniform force.

[0063] When the electromagnet 471 is started, the T-blocks 151 around it can drive the drawstring 150 mounted on the outside of the fixed column 460 to gather towards the electromagnet 471 under the attraction of the electromagnet 471, and at the same time drive the fixed column 460 to move in the moving groove 130 in the mold moving plate 470 and the mold fixing plate 410, and fix the fixed column 460 at the position groove 120 of the first half mold 420 and the second half mold 430, so as to realize the clamping and positioning of the first half mold 420 and the second half mold 430.

[0064] The magnitude of the magnetic force is adjusted by controlling the magnitude of the current of the electromagnet 471, and the distance between the T-block 151 and the electromagnet 471 is controlled by attraction and repulsion, thereby controlling the moving distance of the fixing column 460, so that the present invention is suitable for fixing and positioning workpieces of different sizes and weights, and has strong versatility.

[0065] Embodiment 5: In order to prevent the drawstring 150 from being too light, resulting in weak magnetism or uneven pulling force on the fixed column 460, and to further ensure that the pulling force and pressure on the contact surface of the drawstring 150 on the fixed column 460 at different positions remain uniform, the embodiment of the present application optimizes and improves the structure of the drawstring 150 on the basis of the above embodiment, specifically:

[0066] like Figure 8 As shown, a plurality of cavities are evenly arranged inside the drawstring 150 along its circumference, and an equal amount of iron powder 152 is filled inside every two cavities spaced at equal intervals, so as to ensure that the tension exerted on the contact surface of the drawstring 150 with the fixed columns 460 at different positions remains uniform during the pulling process.

[0067] By setting equal amounts of iron powder 152, it is possible to ensure that the magnetic force of the electromagnet 471 on the drawstring 150 remains uniform at different positions, so that the drawstring 150 has the same pulling force when pulling the fixed columns 460 at different positions, further ensuring the accurate positioning of the first half mold 420 and the second half mold 430 and improving the injection molding efficiency.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic injection molding machine for producing plastic copper-foot buttons, comprising a frame (100), an injection mechanism (200) for injecting molten plastic into a mold cavity, a driving mechanism (300) for pushing the mold to close the mold, a molding mechanism (400) for cooling and solidifying the molten plastic in the mold cavity, and an ejection mechanism (500) for pushing the molded part out of the mold, wherein four guide columns (110) are fixed between a power mounting seat in the driving mechanism (300) and a mold fixing plate (410) in the molding mechanism (400), and characterized in that: The molding mechanism (400) comprises a mold fixing plate (410), a first half mold (420), a second half mold (430), a moving seat (440), a fixing column (460) and a mold moving plate (470); The mold fixing plate (410) is fixed on the frame (100) through the guide column (110) and is used to support, fix and limit the first half mold (420); The first half mold (420) is fixed on the right side of the mold fixing plate (410); The movable seat (440) is fixed to the left end of the curved arm in the driving mechanism (300) and slides on the outside of the guide column (110), and is used to drive the second half mold (430) to move and close the mold with the first half mold (420); The second half mold (430) is fixed on the left side of the movable seat (440) and is used to mold the molten plastic after being molded together with the first half mold (420); The mold moving plate (470) is fixed to the output end of the oil cylinder in the driving mechanism (300) and slides on the outside of the guide column (110), and is used to drive the moving seat (440) to move through the crank arm under the action of the driving mechanism (300); There are four fixed columns (460) arranged transversely, all of which are radially slidably connected to the inside of the mold moving plate (470) along the mold moving plate (470), and are located radially outside the first half mold (420) and the second half mold (430). The left and right ends of the fixed columns (460) extend to the left side of the mold fixing plate (410) and the right side of the mold moving plate (470) respectively, so as to fix, clamp and position the first half mold (420) and the second half mold (430). Position grooves (120) that match the fixing column (460) are provided at four right angles of the first half mold (420) and the second half mold (430); the position grooves (120) are arc structures of a quarter of the circumference of the fixing column (460) and are used to provide a clamping position for the fixing column (460) to clamp and position the first half mold (420) and the second half mold (430); Each of the fixing columns (460) is a hollow cylindrical structure and is internally connected with an elastic rope (140), and each of the elastic ropes (140) is connected to each other to drive the four fixing columns (460) to move synchronously and ensure uniform pressure; An electromagnet (471) is fixed in the middle of the right side of the mold moving plate (470), and the electromagnet (471) is a cylindrical structure; A drawstring (150) is sleeved on the outside of the four fixed columns (460), and the drawstring (150) is a flexible circular ring structure, which is used to cooperate with the electromagnet (471) to drive the four fixed columns (460) to gather and expand synchronously, so as to clamp and fix the first half mold (420) and the second half mold (430); A T-shaped block (151) matching the electromagnet (471) is evenly arranged on one side of the pull belt (150) close to the electromagnet (471) and along the circumference of the electromagnet (471). One end of the T-shaped block (151) close to the electromagnet (471) is an arc-shaped structure made of metal copper, and is used to fit the magnetic field structure of the electromagnet (471) to ensure uniform force.

2. An automatic injection molding machine for producing plastic copper-foot buttons as claimed in claim 1, characterized in that: The arc surfaces of the mold fixing plate (410) and the movable seat (440) are uniformly provided with a plurality of movable groove groups along their circumferences, each movable groove group includes four uniformly arranged movable grooves (130), the movable grooves (130) of each movable groove group have different groove depths and the movable grooves (130) of each movable groove group are arranged in a staggered manner, so as to limit and guide the movement of the fixed column (460).

3. The automatic injection molding machine for producing plastic copper-foot buttons according to claim 1, characterized in that: A surface of the second half mold (430) close to the first half mold (420) is evenly fixed with protrusions (431) along its four edges, and the cross section of the protrusions (431) is an arc structure.

4. An automatic injection molding machine for producing plastic copper-foot buttons as claimed in claim 3, characterized in that: The first half mold (420) is provided with arc-shaped grooves (421) matching with the protrusions (431) evenly arranged along the edges of the first half mold (420) close to the second half mold (430), so as to further position the first half mold (420) and the second half mold (430) when they are joined.

5. The automatic injection molding machine for producing plastic copper-foot buttons according to claim 1, characterized in that: The drawstring (150) has a plurality of cavities evenly arranged along its circumference, and each two cavities spaced at equal intervals are filled with an equal amount of iron powder (152) to ensure that the tension exerted on the contact surface of the drawstring (150) with the fixed columns (460) at different positions during the pulling process remains uniform.

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