Automatic material pulling, cutting, and ejector rod device for injection mold

Abstract

The present invention discloses an automatic material pulling and cutting ejector rod device for an injection mold, which relates to the technical field of material pulling and cutting of injection molds and includes: a frame structure, which includes an ejector rod structure, a material pulling structure, and a demolding structure. The demolding structure includes an ejection structure and a pushing structure. The ejection structure is fixed on the frame structure. The material pulling structure is arranged on the moving mold and the static template. The power assembly drives the moving mold to move away from the static mold and act on the material pulling structure to drive the separation of the static mold and the static template. The demolding structure includes an ejection structure and a pushing structure. Through the adjustable angle design of the ejection structure and the pushing structure, it is ensured that the acting forces between the profile and the ejection structure and the pushing structure can be evenly distributed, so as to ensure that the pushing force can be evenly transmitted in all directions, and at the same time, to avoid excessive local force resulting in profile damage or incomplete demolding, thereby improving the demolding efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of the pulling and cutting of injection molds, in particular to an automatic pulling, cutting and ejector rod device for injection molds. Background Art

[0002] The "automatic pulling, cutting and ejector rod of an injection mold" is a special device used in the injection molding process. In the injection molding process, the mold is a key tool for manufacturing plastic parts. This process involves injecting molten plastic into a pre-designed mold. After the plastic cools and solidifies, the mold opens and the profile is taken out. This automated mechanism can improve production efficiency, reduce manual operation, and ensure the quality and consistency of products. At the same time, by precisely controlling the movement of the ejector rod, damage to the finished product can also be reduced, protecting the appearance and structural integrity of the product.

[0003] The Chinese patent with the authorization announcement number CN101890790B discloses an automatic pulling, cutting and ejector rod device for an injection mold, including a housing base, a pulling and ejector rod, a spring, and a plug. Among them: the housing base is a hollow cylindrical stepped steel member; the center of the housing base is a cylindrical inner cavity with a top at the upper part and an opening at the lower part; the diameter of the inner cavity of the housing base is larger than the diameter of the flange step of the pulling and ejector rod; an internal thread for connecting the plug is provided at the lower opening of the inner cavity of the housing base; a cylindrical flange step is provided at the lower part of the outside of the housing base; a circular top through hole communicating with the top of the inner cavity is provided at the center of the top of the housing base, and the top through hole of the housing base is in sliding fit with the outer diameter of the column body of the pulling and ejector rod. Adopting the technical solution of ejecting the cold slug at the gate of the product after the ejector rod for the product ejects, and breaking the cold slug at the gate of the product to achieve automatic cutting, it overcomes the problems and deficiencies of the existing technology such as complex structure, increased cost, easy failure, and difficulty in standardization. An automatic pulling, cutting and ejector rod device for an injection mold provided, through delayed ejection and automatic cutting, enables the automatic cutting device of the injection mold to achieve the purposes of simple structure, low cost, reliable operation, wide adaptability, and easy standardization and specification.

[0004] The mold is usually composed of a fixed mold and a moving mold. The moving mold displaces relative to the static mold to realize mold opening and closing, and the profile is demolded during mold opening. The profile is ejected through the combined action of the fixed mold, the moving mold and the ejector rod structure. The ejector rod structure is arranged on the fixed mold. There are the following several defects in this process: First, the ejector rod structure is generally a straight rod. The straight rod pushes the profile to demold the profile. However, the connection strength between each part of the profile and the moving mold is different. If the profile is forcibly pushed by the ejector rod, it is easy to cause excessive local stress on the profile and damage the profile. Second, during mold opening, although in most cases, the profile moves with the moving mold and separates from the static mold, sometimes it adheres to the static mold, resulting in the ineffectiveness of the ejector rod structure. In this case, manual demolding is required, and the demolding efficiency is low.

[0005] To this end, the present invention proposes an automatic material pulling and cutting ejector rod device for an injection mold to solve the above problems. Summary of the Invention

[0006] In view of the problems existing in the above-mentioned prior art, the present invention is proposed.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: an automatic material pulling and cutting ejector rod device for an injection mold, which includes:

[0008] A frame structure;

[0009] A mold assembly, which includes a moving mold structure and a stationary mold structure. The moving mold structure includes a moving mold and a moving template, and the stationary mold structure includes a stationary mold and a stationary template. An activity cavity is formed between the moving mold and the moving template, and a working cavity is formed between the stationary mold and the stationary template. The stationary template is fixed on the frame structure and its position remains unchanged;

[0010] A power assembly, which is used to drive the moving mold structure to move towards or away from the stationary mold structure;

[0011] A demolding assembly, which includes an ejector rod structure, a material pulling structure and a demolding structure. The demolding structure includes an ejection structure and a pushing structure. The ejector rod structure is fixed on the frame structure. The material pulling structure is arranged on the stationary mold and the stationary template. The power assembly drives the moving mold to move away from the stationary mold and act on the material pulling structure to drive the stationary mold and the stationary template to separate. The relatively moving stationary mold and stationary template act on the pushing structure to cause the pushing structure to unfold and act on the profile to push the profile away from the stationary mold. And the power assembly drives the moving template to continue to move so that the ejector rod structure penetrates into the activity cavity and acts on the ejection structure, and the ejection structure displaces away from the moving mold to drive the profile to demold.

[0012] As a preferred solution of the automatic material pulling and cutting ejector rod device for the injection mold of the present invention, wherein: the pushing structure includes a pushing component and a gear component. The gear component includes two parallel racks and an annular gear. The two parallel racks are arranged in parallel and are meshed with each other through the annular gear;

[0013] The two groups of parallel racks are respectively a left rack and a right rack. The right rack is connected to the stationary template. When the moving template drives the stationary mold and the stationary template to separate through the material pulling structure, the moving template moving relative to the stationary mold acts on the right rack to drive the right rack to mesh with the left rack, causing the left rack to displace in the reverse direction and squeeze the profile, so as to drive the profile and the stationary mold to become loose.

[0014] As a preferred solution of the automatic material pulling and cutting ejector rod device for the injection mold of the present invention, wherein: the stationary mold is provided with stacked holes in the mold cavity;

[0015] The pushing component includes a telescopic component and a mounting substrate. The left rack is movably connected to the mounting substrate through the telescopic component. The mounting substrate penetrates through the stationary mold. The telescopic component stretches the mounting substrate and presses it against the stacked holes on the surface of the stationary mold to seal the stacked holes.

[0016] As a preferred solution of the automatic material pulling, material cutting, and ejector rod device of the injection mold according to the present invention, wherein: the telescopic component includes a straight rod movable bracket and a bent rod movable bracket. Both the straight rod movable bracket and the bent rod movable bracket are installed between the left rack and the mounting substrate. The straight rod movable bracket includes a connecting part and a telescopic part. The connecting part of the straight rod movable bracket includes two triangular plates. The two triangular plates are respectively hinged to the left rack and the surface of the mounting substrate. The telescopic part of the straight rod movable bracket includes a combined straight rod. The middle part of the combined straight rod is provided with a telescopic rod, and two groups of limit pieces are fixed on the surface of the combined straight rod. A spring is fixed between the two groups of limit pieces. The spring is wound around the combined straight rod. By pressing or stretching the two groups of limit pieces, the middle part of the combined straight rod can be synchronously contracted or elongated.

[0017] As a preferred solution of the automatic material pulling, material cutting, and ejector rod device of the injection mold according to the present invention, wherein: the bent rod movable bracket includes a connecting part and a telescopic part. The telescopic part of the bent rod movable bracket is configured as a group of combined bent rods. One end of the combined bent rod is connected to the left rack, and the other end is connected to the connecting part of the bent rod movable bracket;

[0018] The connecting part of the bent rod movable bracket includes a spherical base and a semi-spherical head rotating in the spherical base. The combined bent rod is connected to the top end of the semi-spherical head. The spherical base is fixed on the mounting substrate.

[0019] As a preferred solution of the automatic material pulling, material cutting, and ejector rod device of the injection mold according to the present invention, wherein: the ejection structure includes an acting unit and a stretching unit. The stretching unit and the acting unit are fixedly connected;

[0020] The stretching unit includes an acting plate and a hook spring. One end of the hook spring is connected to the acting plate, and the other end of the hook spring is connected to the inner wall of the moving mold.

[0021] As a preferred solution of the automatic material pulling, material cutting, and ejector rod device of the injection mold according to the present invention, wherein: the material pulling structure includes multiple first guide rods and multiple second guide rods. The multiple first guide rods are fixed at the four corners of the moving template and penetrate through the stationary mold and the stationary template. A first limit plate is fixed at one end of the first guide rod passing through the stationary template; the multiple second guide rods are fixed on the surface of the stationary template and penetrate through the stationary mold. A second limit plate is fixed at one end of the second guide rod passing through the stationary mold.

[0022] As a preferred embodiment of the automatic material pulling and cutting ejector rod device of the injection mold described in the present invention, the ejector rod structure includes an ejector rod plate and an ejector rod connected integrally. Side support plates are fixed at both ends of the ejector rod plate, and the side support plates are fixed to the frame structure.

[0023] As a preferred embodiment of the automatic material pulling and cutting ejector rod device of the injection mold described in the present invention, a set of mounting motor seats are supported on the frame structure, and the frame structure supports a power assembly through the mounting motor seats;

[0024] The power assembly includes a motor, a linkage structure, and a rotating structure. The motor drives the rotating structure to rotate through the linkage structure. The linkage structure includes two sets of pulleys and a belt connected inside the pulleys. The two sets of pulleys are respectively fixed to the output end of the motor and both ends of the rotating structure;

[0025] The rotating structure is a worm structure with smooth ends.

[0026] As a preferred embodiment of the automatic material pulling and cutting ejector rod device of the injection mold described in the present invention, the power assembly further includes an auxiliary structure. The auxiliary structure includes a vertical rod and multiple side plates. The vertical rod is fixed to the surface of the frame structure, and the side plates are fixed to both sides of the moving mold plate and the static mold plate. The rotating structure is supported and clamped jointly by the side plate on the side of the static mold plate and the vertical rod, and the rotating structure is arranged in a threaded connection with the side plate on the side of the moving mold plate.

[0027] The beneficial effects of the present invention: By providing a demolding assembly, which includes an ejector rod structure, a material pulling structure, and a demolding structure, the power assembly drives the moving mold to move away from the static mold and act on the material pulling structure to drive the static mold and the static mold plate to separate. The relatively moving static mold and static mold plate act on the pushing structure, so that the pushing structure unfolds and acts on the profile to push the profile away from the static mold. Moreover, the power assembly drives the moving mold plate to continue moving so that the ejector rod structure penetrates into the moving cavity and acts on the ejecting structure. The ejecting structure moves away from the moving mold to drive the profile to demold. By adopting the relative movement between the moving mold, the moving mold plate, the static mold, and the static mold plate, accurate and effective demolding of the profile can be achieved, without the need for multiple driving devices to cooperate, simplifying the structure and improving the demolding efficiency. Secondly, the demolding structure includes an ejecting structure and a pushing structure. Through the adjustable angle design of the ejecting structure and the pushing structure, it is ensured that the acting forces between the profile and the ejecting structure and the pushing structure can be evenly distributed, so as to ensure that the pushing force can be evenly transmitted in all directions, and at the same time avoid excessive local stress causing damage or incomplete demolding of the profile, thereby improving the demolding efficiency. Description of the Drawings

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 Schematic diagram of the overall structure of the automatic material pulling, cutting, and ejector rod device for the injection mold in the present invention Figure 1 ;

[0030] Figure 2 Schematic diagram of the overall structure of the automatic material pulling, cutting, and ejector rod device for the injection mold in the present invention Figure 2 ;

[0031] Figure 3 Cross-sectional view of the overall structure of the automatic material pulling, cutting, and ejector rod device for the injection mold in the present invention;

[0032] Figure 4 Schematic diagram of the overall structure of the stretching unit in the present invention;

[0033] Figure 5 Schematic diagram of the overall structure of the material pulling structure in the present invention;

[0034] Figure 6 Schematic diagram of the overall structure of the stationary mold structure in the present invention;

[0035] Figure 7 Schematic diagram of the back structure of the stationary mold in the present invention;

[0036] Figure 8 Schematic diagram of the front structure of the stationary mold in the present invention;

[0037] Figure 9 Partial structure schematic diagram of the ejection structure in the present invention;

[0038] Figure 10 Partial structure axonometric view of the ejection structure in the present invention;

[0039] Figure 11 For Figure 10 Enlarged view of the structure of part A;

[0040] Figure 12 Schematic diagram of the overall structure of the ejection assembly in the present invention;

[0041] Figure 13 For Figure 12 Enlarged view of the structure of part B.

[0042] Reference Numerals: 100, frame structure; 101, mounting motor base; 200, mold assembly; 210, moving mold structure; 211, moving mold; 212, moving template; 213, movable cavity; 220, stationary mold structure; 221, stationary mold; 2211, stacked holes; 222, stationary template; 223, working cavity; 300, power assembly; 310, motor; 320, linkage structure; 321, pulley; 322, belt; 330, rotating structure; 340, auxiliary structure; 341, vertical rod; 342, side plate; 400, demolding assembly; 410, ejector rod structure; 411, ejector rod plate; 412, ejector rod; 413, side support plate; 420, material pulling structure; 421, guide rod 1; 4211, limit plate 1; 422, guide rod 2; 4221, limit plate 2; 430, ejection structure; 431, acting unit; 432, stretching unit; 4321, acting plate; 4322, hook spring; 440, pushing out structure; 441, pushing out assembly; 4411, mounting substrate; 4412, bent rod movable bracket; 44121, combined bent rod; 44122, spherical base; 44123, semi-spherical head; 4413, straight rod movable bracket; 44131, triangular plate; 44132, combined straight rod; 44133, limit piece; 44134, spring; 442, gear assembly; 4421, left rack; 4422, right rack; 4423, annular gear; 4424, support column; 443, mounting frame. Detailed Embodiments

[0043] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following detailed description of the specific embodiments of the present invention is provided in conjunction with the accompanying drawings of the specification.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0045] Secondly, the so-called "one embodiment" or "embodiment" 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 in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that mutually excludes other embodiments.

[0046] Embodiment 1

[0047] Referring to Figures 1 - 12 As shown, this is the first embodiment of the present invention. This embodiment provides an automatic material pulling, cutting, and ejector rod device for an injection mold, including:

[0048] Frame structure 100;

[0049] Mold assembly 200, which includes a moving mold structure 210 and a stationary mold structure 220. The moving mold structure 210 includes a moving mold 211 and a moving template 212. The stationary mold structure 220 includes a stationary mold 221 and a stationary template 222. The moving mold 211 is assembled on the moving template 212, and the stationary mold 221 is assembled on the stationary template 222. An activity cavity 213 is formed between the moving mold 211 and the moving template 212, and a working cavity 223 is formed between the stationary mold 221 and the stationary template 222. The stationary template 222 is fixed on the frame structure 100, and its position remains unchanged;

[0050] Power assembly 300. The power assembly 300 is used to drive the moving mold structure 210 to move towards or away from the stationary mold structure 220. The moving mold 211 moves synchronously with the moving template 212 towards the stationary mold 221, causing the moving mold 211 and the stationary mold 221 to fit tightly. A cavity for forming profiles is formed between the stationary mold 221 and the moving mold 211. The moving mold 211 moves synchronously with the moving template 212 away from the stationary mold 221 to separate the moving mold 211 and the stationary mold 221, and the profile is removed from the cavity;

[0051] Demolding assembly 400, which includes a ejector rod structure 410, a material pulling structure 420 and a demolding structure. The demolding structure includes an ejection structure 430 and a pushing structure 440. The ejection structure 430 is installed in the activity cavity 213 and penetrates the moving mold 211 to push the profile out of the cavity. The pushing structure 440 is installed in the working cavity 223 to push the profile to separate from the stationary template 222. The ejector rod structure 410 is fixed on the frame structure 100. The material pulling structure 420 is arranged on the stationary mold 221 and the stationary template 222. The power assembly 300 drives the moving mold 211 to move away from the stationary mold 221 to act on the material pulling structure 420 to drive the stationary mold 221 and the stationary template 222 to separate, the profile is separated from the material at the fluoroplastic injection port, the profile is disconnected from the fluoroplastic. The relatively moving stationary mold 221 and stationary template 222 act on the pushing structure 440 to cause the pushing structure 440 to expand and act on the profile to push the profile away from the stationary mold 221, and the power assembly 300 drives the moving template 212 to continue to move so that the ejector rod structure 410 penetrates into the activity cavity 213 and acts on the ejection structure 430. The ejection structure 430 displaces away from the moving mold 211 to drive the profile to demold.

[0052] As Figures 9 - 12 shown, the pushing structure 440 includes a pushing component 441 and a gear component 442. The gear component 442 includes two parallel racks and an annular gear 4423. The two parallel racks are arranged in parallel and are meshed with each other through the annular gear 4423;

[0053] The two sets of the parallel racks are respectively a left rack 4421 and a right rack 4422. The right rack 4422 is connected to the stationary template 222. When the moving template 212 drives the stationary mold 221 and the stationary template 222 to separate through the material pulling structure 420, the moving template 212 moving relative to the stationary mold 221 acts on the right rack 4422 to drive the right rack 4422 to engage with the left rack 4421, so that the left rack 4421 displaces in the reverse direction to extrude the profile, and the profile and the stationary mold 221 are loosened.

[0054] The pushing structure 440 further includes a mounting frame 443 arranged in the working cavity 223. The mounting frame 443 is used to engage with the parallel racks to drive the parallel racks to displace in a fixed direction, and a support column 4424 is assembled on the mounting frame 443. The mounting frame 443 supports the annular gear 4423 through the support column 4424.

[0055] As Figure 8 shown, the stationary mold 221 is provided with overlapping holes 2211 in the mold cavity;

[0056] As Figure 12 shown, the pushing assembly 441 includes a telescopic assembly and a mounting substrate 4411. The left rack 4421 is movably connected to the mounting substrate 4411 through the telescopic assembly. The mounting substrate 4411 penetrates through the stationary mold 221. The telescopic assembly stretches the mounting substrate 4411 and presses it on the overlapping holes 2211 on the surface of the stationary mold 221 to seal the overlapping holes 2211.

[0057] The telescopic assembly includes a straight rod movable bracket 4413 and a bent rod movable bracket 4412. Both the straight rod movable bracket 4413 and the bent rod movable bracket 4412 are installed between the left rack 4421 and the mounting substrate 4411. The straight rod movable bracket 4413 includes a connecting part and a telescopic part. The connecting part of the straight rod movable bracket 4413 includes two triangular plates 44131. The two triangular plates 44131 are respectively hinged to the surfaces of the left rack 4421 and the mounting substrate 4411. The telescopic part of the straight rod movable bracket 4413 includes a combined straight rod 44132. The middle part of the combined straight rod 44132 is provided with a telescopic rod, and two groups of limit pieces 44133 are fixed on the surface of the combined straight rod 44132. A spring 44134 is fixed between the two groups of limit pieces 44133. The spring 44134 is wound around the combined straight rod 44132. By pressing or stretching the two groups of limit pieces 44133, the middle part of the combined straight rod 44132 contracts or elongates synchronously.

[0058] The bent rod movable bracket 4412 includes a connecting portion and a telescopic portion. The telescopic portion of the bent rod movable bracket 4412 is configured as a set of combined bent rods 44121. One end of the combined bent rod 44121 is connected to the left rack 4421, and the other end is connected to the connecting portion of the bent rod movable bracket 4412. Refer to Figure 12 , Figure 13 As shown, the combined bent rod 44121 and the combined straight rod 44132 have the same structure, but the rod body of the combined bent rod 44121 is bent.

[0059] The connecting portion of the bent rod movable bracket 4412 includes a spherical base 44122 and a semi-spherical head 44123 that rotates within the spherical base 44122. The combined bent rod 44121 is connected to the top of the semi-spherical head 44123, and the spherical base 44122 is fixed to the mounting substrate 4411.

[0060] Specifically, during the injection molding process, the moving mold 211 and the stationary mold 221 are closely fitted to form a cavity. After the molten plastic is injected into the cavity and cooled and solidified to form a profile, when the profile is formed, the power assembly 300 drives the moving mold 211 and the moving template 212 to move away from the stationary mold 221. The moving mold 211 and the moving template 212 transmit force to the stationary mold 221 and the stationary template 222 through the material pulling structure 420, resulting in relative movement between the stationary mold 221 and the stationary template 222. When the stationary mold 221 and the stationary template 222 move relatively, the right rack 4422 moves away from or approaches the stationary mold 221 as the stationary template 222 moves relatively. Then, through the meshing action of the annular gear 4423, the left rack 4421 is driven to displace in the reverse direction, and the left rack 4421 that displaces in the reverse direction applies pressure to the ejection assembly 441.

[0061] When the left rack 4421 displaces in the reverse direction, the straight rod movable bracket 4413 and the bent rod movable bracket 4412 will be compressed and shortened. At the same time, through the straight rod movable bracket 4413 and the bent rod movable bracket 4412 acting on the mounting substrate 4411, the mounting substrate 4411 is pushed forward. The mounting substrate 4411 passes through the stationary mold 221, and the front end of the mounting substrate 4411 will directly contact the profile and touch the profile, loosening the connection between the profile and the stationary mold 221. When the moving mold 211 and the stationary mold 221 are separated, the profile is taken away from the stationary mold 221 by the moving mold 211 to ensure that when the moving mold 211 and the stationary mold 221 are opened, the profile is connected to the moving mold 211.

[0062] During the process of injecting molten plastic into the cavity, the moving mold 211, the moving template 212, the stationary mold 221, and the stationary template 222 are in a pairwise fitting state. The straight rod movable bracket 4413 and the bent rod movable bracket 4412 are stretched. The straight rod movable bracket 4413 and the bent rod movable bracket 4412 stretch the mounting substrate 4411 through the tensile force, so that the mounting substrate 4411 tightly presses on the stacked holes 2211 on the surface of the stationary mold 221 to ensure the sealing of the cavity.

[0063] Among them, the settings of the triangular plate 44131, the spherical base 44122, and the semi-spherical head 44123 are to endow the mounting substrate 4411 with a certain angle adjustability, so as to ensure that the acting force between the profile and the mounting substrate 4411 can be evenly distributed. Specifically, after the profile is formed in the stationary mold 221, the front end of the mounting substrate 4411 directly contacts the profile to touch the profile, making the connection between the profile and the stationary mold 221 loose. Since the bonding strength between the profile and the stationary mold 221 is different at different positions, the detachment difficulty at different positions where the profile is connected to the stationary mold 221 is different. Therefore, the hinged design of the triangular plate 44131 allows the mounting substrate 4411 to make a small angle adjustment during the ejection process to ensure that the mounting substrate 4411 rotates following the profile, so as to ensure that the ejection force can be evenly transmitted in all directions, and at the same time avoid excessive local force causing damage to the profile or incomplete demolding, thereby improving the demolding efficiency.

[0064] As Figure 4 shown, the ejection structure 430 includes an acting unit 431 and a stretching unit 432, and the stretching unit 432 and the acting unit 431 are fixedly connected.

[0065] The stretching unit 432 includes an acting plate 4321 and a hook spring 4322. One end of the hook spring 4322 is connected to the acting plate 4321, and the other end of the hook spring 4322 is connected to the inner wall of the moving mold 211.

[0066] Specifically, the acting unit 431 is composed of a mounting frame 443, a left rack 4421, and a pushing component 441. The structure and connection relationship among the mounting frame 443, the left rack 4421, and the pushing component 441 have been specifically described above and will not be repeated here. The mounting frame 443, the left rack 4421, and the pushing component 441 in the acting unit 431 are not the same as those in the ejection structure 440, but have the same structure.

[0067] Specifically, the mounting frame 443 in the acting unit 431 is fixed in the moving mold 211 and restricts the movement direction of the pushing component 441.

[0068] The pulling structure 420 includes a plurality of first guide rods 421 and a plurality of second guide rods 422. The plurality of first guide rods 421 are fixed at the four corners of the moving template 212 and penetrate through the stationary mold 221 and the stationary template 222. One end of the first guide rod 421 passing out of the stationary template 222 is fixed with a first limiting plate 4211. The plurality of second guide rods 422 are fixed on the surface of the stationary template 222 and penetrate through the stationary mold 221. One end of the second guide rod 422 passing out of the stationary mold 221 is fixed with a second limiting plate 4221.

[0069] Specifically, when the moving mold 211 drives the first guide rod 421 to move away from the stationary mold 221, the first limiting plate 4211 gradually approaches the stationary template 222 and passes through the stationary template 222, penetrates into the stationary mold 221, and abuts against the inside of the stationary mold 221 to drive the separation of the stationary mold 221 and the stationary template 222. Secondly, when the stationary mold 221 moves away from the stationary template 222, the second limiting plate 4221 gradually approaches the stationary mold 221 and abuts against the inside of the stationary mold 221 to limit the stationary mold 221, so that the stationary mold 221 and the moving mold 211 are separated, and the profile is stripped.

[0070] As Figure 3 shown, the ejector rod structure 410 includes an ejector rod plate 411 and an ejector rod 412 which are integrally connected. Side support plates 413 are fixed at both ends of the ejector rod plate 411. The side support plates 413 are fixed on the frame structure 100. When the power assembly 300 drives the moving template 212 to move away from the stationary template 222, the ejector rod 412 penetrates into the movable cavity 213 and abuts against the action plate 4321. The hook spring 4322 is in a more extended state. The action plate 4321 is connected to the left rack 4421 to drive the ejection assembly 441 to move towards the moving mold 211, so as to drive the separation of the profile from the moving mold 211 and strip the profile.

[0071] As Figure 1 shown, a set of mounting motor bases 101 are supported on the frame structure 100. The frame structure 100 supports the power assembly 300 through the mounting motor bases 101.

[0072] The power assembly 300 includes a motor 310, a linkage structure 320, and a rotating structure 330. The motor 310 drives the rotating structure 330 to rotate through the linkage structure 320. The linkage structure 320 includes two sets of pulleys 321 and a belt 322 connected inside the pulleys 321. The two sets of pulleys 321 are respectively fixed at the output end of the motor 310 and both ends of the rotating structure 330.

[0073] The rotating structure 330 is a worm structure with smooth ends.

[0074] The powertrain 300 further includes an auxiliary structure 340. The auxiliary structure 340 includes a vertical rod 341 and multiple side plates 342. The vertical rod 341 is fixed to the surface of the frame structure 100, and the side plates 342 are fixed to both sides of the moving template 212 and the static template 222. The side plate 342 on the side of the static template 222 and the vertical rod 341 jointly support and engage the rotating structure 330, and the rotating structure 330 is threadedly connected to the side plate 342 on the side of the moving template 212.

[0075] Specifically, after the profile is formed in the static mold 221, the powertrain 300 starts to drive the moving mold 211 and the moving template 212 to move away from the static mold 221. During this process, the moving mold 211 and the moving template 212 transfer force to the static mold 221 and the static template 222 through the material pulling structure 420, resulting in relative movement between the static mold 221 and the static template 222.

[0076] Specifically, as the moving mold 211 and the moving template 212 move, the right-position rack 4422 moves away from or closer to the moving mold 211 relative to the moving mold 211, and then, through the meshing action of the annular gear 4423, drives the left-position rack 4421 to displace in the opposite direction. The left-position rack 4421 that displaces in the opposite direction applies pressure to the ejection assembly 441. When the left-position rack 4421 moves towards the static mold 221, the straight rod movable bracket 4413 and the bent rod movable bracket 4412 will be compressed and shortened, and at the same time, act on the mounting substrate 4411 through the straight rod movable bracket 4413 and the bent rod movable bracket 4412, pushing the mounting substrate 4411 to move forward. The mounting substrate 4411 penetrates the static template 222, and its front end will directly contact the profile, touching the profile, making the connection between the profile and the static mold 221 loose. During this process, the profile will act on the moving mold 211, causing a certain gap between the static mold 221 and the moving mold 211.

[0077] During the process of the moving mold 211 and the moving template 212 continuing to move away from the static mold 221, the profile follows the displacement of the moving mold 211, and the ejector rod structure 410 gradually enters the movable cavity 213 and acts on the ejection structure 430. The ejection structure 430 displaces away from the moving mold 211, further pushing the profile out of the mold cavity.

[0078] When the moving mold 211 stops displacing, the profile is separated from the static mold 221 under the action of the ejection structure 430.

[0079] During the gradual separation process of the moving mold 211 and the static mold 221, this device ensures the efficient demolding of the profile through the coordinated action of the ejection structure 440 and the ejection structure 430, reduces the demolding time, improves the production efficiency, and uses a group of power sources, that is, the motor 310, without the need for excessive power equipment to cooperate with each other, simplifying the structure.

[0080] The design of the triangular plate 44131, spherical base 44122, and semi-spherical head 44123 gives a certain angle adjustability to the mounting substrate 4411, ensuring that the ejection force is evenly distributed in all directions and avoiding excessive local stress that may cause damage to the profile or incomplete demolding.

[0081] Certainly, the above content is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples. Equivalent changes and improvements made by those of ordinary skill in the art within the essence of the present invention shall fall within the scope covered by the patent of the present invention.

[0082] Finally, several points should be noted: First, in the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", and "coupling" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the internal communication of two components, and can be directly connected. "Upper", "lower", "left", "right", etc. are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0083] Second: In the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. Other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0084] Finally: The above description is only a preferred embodiment of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Automatic material pulling, cutting and ejector device for injection mold, characterized in that: include: Frame structure (100); A mold assembly (200) comprising a movable mold structure (210) and a static mold structure (220), wherein the movable mold structure (210) comprises a movable mold (211) and a movable mold plate (212), and the static mold structure (220) comprises a static mold (221) and a static mold plate (222), wherein a movable cavity (213) is formed between the movable mold (211) and the movable mold plate (212), and a working cavity (223) is formed between the static mold (221) and the static mold plate (222), and the static mold plate (222) is fixed on the frame structure (100) and its position remains unchanged; A power assembly (300), the power assembly (300) being used to drive the movable mold structure (210) to move toward or away from the static mold structure (220); The demoulding assembly (400) comprises a push rod structure (410), a material pulling structure (420) and a demoulding structure, wherein the demoulding structure comprises an ejection structure (430) and a push-out structure (440), wherein the push rod structure (410) is fixed to a frame structure (100), the material pulling structure (420) is arranged on a static mold (221) and a static mold plate (222), and the power assembly (300) drives the dynamic mold (211) to move away from the static mold (221) to act on the material pulling structure (420) to drive the static mold (221) to move away from the static mold (221) to move the static mold (222). ) and the static mold (222), the static mold (221) and the static mold (222) moving relative to each other act on the ejection structure (440), so that the ejection structure (440) unfolds and acts on the profile to push the profile away from the static mold (221), and the power assembly (300) drives the dynamic mold (212) to continuously move so that the ejector structure (410) penetrates into the active cavity (213) and acts on the ejection structure (430), and the ejection structure (430) moves away from the dynamic mold (211) to drive the profile to be demoulded; The ejection structure (440) comprises an ejection assembly (441) and a gear assembly (442), wherein the gear assembly (442) comprises two parallel racks and a ring gear (4423), wherein the two parallel racks are arranged in parallel and mesh with each other through the ring gear (4423); The two groups of parallel racks are respectively a left rack (4421) and a right rack (4422), and the right rack (4422) is connected to the static mold (222). When the dynamic mold (212) drives the static mold (221) and the static mold (222) to separate through the material pulling structure (420), the dynamic mold (212) moving relative to the static mold (221) acts on the right rack (4422) to drive the right rack (4422) to mesh with the left rack (4421), so that the left rack (4421) moves in the opposite direction to extrude the profile, thereby driving the profile and the static mold (221) to loosen; The ejection assembly (441) comprises a telescopic assembly and a mounting base plate (4411); the left rack (4421) is movably connected to the mounting base plate (4411) via the telescopic assembly; the telescopic assembly comprises a straight rod movable bracket (4413) and a bent rod movable bracket (4412); the straight rod movable bracket (4413) and the bent rod movable bracket (4412) are both mounted between the left rack (4421) and the mounting base plate (4411); the straight rod movable bracket (4413) comprises a connecting portion and a telescopic portion; the connecting portion of the straight rod movable bracket (4413) comprises two triangular plates (44131); the two triangular plates (44131) are respectively The straight rod movable bracket (4413) is hinged to the left rack (4421) and the surface of the mounting base plate (4411), and the telescopic part of the straight rod movable bracket (4413) includes a combined straight rod (44132), the middle part of the combined straight rod (44132) is a telescopic rod, and two groups of limiting plates (44133) are fixed on the surface of the combined straight rod (44132), a spring (44134) is fixed between the two groups of limiting plates (44133), and the spring (44134) is wound on the combined straight rod (44132), and the middle part of the combined straight rod (44132) is synchronously contracted or extended by pressing or stretching the two groups of limiting plates (44133); The bent rod movable bracket (4412) comprises a connecting portion and a telescopic portion, the telescopic portion of the bent rod movable bracket (4412) being configured as a group of combined bent rods (44121), one end of the combined bent rods (44121) being connected to the left rack (4421), and the other end being connected to the connecting portion of the bent rod movable bracket (4412); The connection portion of the bent rod movable bracket (4412) comprises a spherical base (44122) and a semi-circular spherical head (44123) rotating in the spherical base (44122); the combined bent rod (44121) is connected to the top of the semi-circular spherical head (44123); and the spherical base (44122) is fixed on the mounting base plate (4411); The static mold (221) is provided with a stacking hole (2211) in the mold cavity; the mounting substrate (4411) penetrates the static mold (221), and the telescopic component stretches the mounting substrate (4411) to press on the stacking hole (2211) on the surface of the static mold (221) to seal the stacking hole (2211).

2. The automatic material pulling, cutting and ejector device for injection mold according to claim 1, characterized in that: The ejection structure (430) comprises an action unit (431) and a stretching unit (432), and the stretching unit (432) is fixedly connected to the action unit (431); The stretching unit (432) comprises an action plate (4321) and a hook spring (4322), one end of the hook spring (4322) is connected to the action plate (4321), and the other end of the hook spring (4322) is connected to the inner wall of the movable mold (211).

3. The automatic material pulling, cutting and ejector device for the injection mold according to claim 2, characterized in that: The material pulling structure (420) comprises a plurality of guide rods one (421) and a plurality of guide rods two (422). The plurality of guide rods one (421) are fixed to the four corners of the movable mold plate (212) and penetrate the static mold plate (221) and the static mold plate (222). The end of the guide rod one (421) passing through the static mold plate (222) is fixed to the limit plate one (4211); the plurality of guide rods two (422) are fixed to the surface of the static mold plate (222) and penetrate the static mold plate (221). The end of the guide rod two (422) passing through the static mold plate (221) is fixed to the limit plate two (4221).

4. The automatic material pulling, cutting and ejector device for the injection mold according to claim 3, characterized in that: The top rod structure (410) comprises a top rod plate (411) and a top rod (412) connected in an integral manner, and side support plates (413) are fixed to both ends of the top rod plate (411), and the side support plates (413) are fixed to the frame structure (100).

5. The automatic material pulling, cutting and ejector device for the injection mold according to claim 4, characterized in that: A group of motor mounting seats (101) are supported on the frame structure (100), and the frame structure (100) supports the power assembly (300) via the motor mounting seats (101); The power assembly (300) comprises a motor (310), a linkage structure (320) and a rotating structure (330); the motor (310) drives the rotating structure (330) to rotate via the linkage structure (320); the linkage structure (320) comprises two sets of pulleys (321) and belts (322) connected to the pulleys (321); the two sets of pulleys (321) are respectively fixed to the output end of the motor (310) and the two ends of the rotating structure (330); The rotating structure (330) is a worm structure with smooth ends.

6. The automatic material pulling, cutting and ejector device for the injection mold according to claim 5, characterized in that: The power assembly (300) further comprises an auxiliary structure (340), wherein the auxiliary structure (340) comprises a vertical rod (341) and a plurality of side plates (342), wherein the vertical rod (341) is fixed to the surface of the frame structure (100), and the side plates (342) are fixed to both sides of the movable template (212) and the static template (222), and the rotating structure (330) is supported and engaged by the side plates (342) on the side of the static template (222) and the vertical rod (341), and the rotating structure (330) is threadedly connected to the side plates (342) on the side of the movable template (212).

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