Automatic material pulling and cutting ejector rod device of injection mold

Abstract

The invention discloses an automatic material pulling and cutting ejector rod device of an injection mold, and relates to the technical field of material pulling and cutting of the injection mold, the automatic material pulling and cutting ejector rod device comprises a frame structure, the frame structure comprises an ejector rod structure, a material pulling structure and a demolding structure, the demolding structure comprises an ejection structure and a push-out structure, the ejection structure is fixed on the frame structure, and the push-out structure is fixed on the frame structure; the material pulling structure is arranged on the movable mold and the static mold plate, the power assembly drives the movable mold to move away from the static mold to act on the material pulling structure so as to drive the static mold and the static mold plate to be separated, and the demolding structure comprises an ejection structure and a push-out structure; by means of the adjustable angle design of the ejection structure and the push-out structure, it is guaranteed that acting force between the sectional material and the ejection structure and acting force between the sectional material and the push-out structure can be evenly distributed, it is guaranteed that push-out force can be evenly transmitted in all directions, meanwhile, damage to the sectional material or incomplete demolding caused by too large local stress is avoided, and the demolding efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of material pulling and breaking of injection moulds, in particular to an automatic material pulling and breaking ejector rod device of the injection mould. Background Art

[0002] The "Automatic Pull and Cut Ejector for Injection Molds" is a special device used in the injection molding process. In the injection molding process, the mold is a key tool used to manufacture 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 operations, and ensure product quality and consistency. At the same time, by precisely controlling the action of the ejector, it can also reduce damage to the finished product and protect the appearance and structural integrity of the product.

[0003] The Chinese patent with the authorization announcement number CN101890790B discloses an automatic material pulling and cutting ejector device for an injection mold, including a shell seat, an ejector rod, a spring, and a plug, wherein: the shell seat is a hollow cylindrical step-shaped steel component; the center of the shell seat is a cylindrical inner cavity with a top at the top and an opening at the bottom; the diameter of the shell seat inner cavity is larger than the diameter of the flange step of the ejector rod; an internal thread for connecting the plug is provided at the lower opening of the shell seat inner cavity; a cylindrical flange step is provided at the lower part of the shell seat outer surface; a The circular top through hole and the top through hole of the shell seat are slidably matched with the outer diameter of the cylinder of the pull-pull ejector rod. The ejection is delayed after the ejector rod of the product, and the cold material head is broken at the glue inlet of the product to realize automatic material cutting. The technical solution overcomes the problems and shortcomings of the prior art such as complex structure, increased cost, easy failure and difficulty in standardization. An automatic pull-pull and material cutting ejector rod device for an injection mold is provided. By delaying the ejection and automatically cutting the material, the automatic material cutting device of the injection mold achieves the purpose of simple structure, low cost, reliable operation, wide adaptability and easy standardization.

[0004] The mold is usually composed of a fixed mold and a movable mold. The movable mold is displaced relative to the static mold to realize mold opening and closing. The mold is opened to remove the material, and the fixed mold, the movable mold and the ejector structure work together to realize the removal of the profile. The ejector structure is arranged on the fixed mold. There are several defects in this process: First, the ejector structure is generally a straight rod, which pushes the profile to demold the profile, but the connection strength between each part of the profile and the movable mold is different. If the ejector is forcibly used to push the profile, it is easy to cause excessive force on the local part of the profile, resulting in damage to the profile; secondly, when opening the mold, although in most cases the profile follows the movable mold to move and separate from the static mold, it sometimes sticks to the static mold, causing the ejector structure to fail to work. 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 device for an injection mold to solve the above-mentioned problem. Summary of the invention

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

[0007] In order to solve the above technical problems, the present invention provides the following technical solution: an automatic material pulling and cutting ejector device for an injection mold, comprising: Frame structure; The mold assembly includes a movable mold structure and a static mold structure, wherein the movable mold structure includes a movable mold and a movable platen, and the static mold structure includes a static mold and a static platen, wherein a movable cavity is formed between the movable mold and the movable platen, and a working cavity is formed between the static mold and the static platen, and the static platen is fixed on the frame structure and its position remains unchanged; A power assembly, the power assembly is used to drive the movable mold structure to move toward or away from the static mold structure; A demoulding assembly includes a push rod structure, a material pulling structure and a demoulding structure, wherein the demoulding structure includes an ejection structure and a push-out structure, wherein the push rod structure is fixed to a frame structure, and the material pulling structure is arranged on a static mold and a static mold plate, wherein the power assembly drives the dynamic mold to move away from the static mold to act on the material pulling structure to drive the static mold and the static mold plate to separate, wherein the static mold and the static mold plate that move relative to each other act on the push-out structure to enable the push-out structure to unfold and act on the profile to push the profile away from the static mold, and wherein the power assembly drives the dynamic mold plate to continuously move so that the push rod structure penetrates into the active cavity and acts on the ejection structure, and wherein the ejection structure moves away from the dynamic mold to drive the profile to be demoulded.

[0008] As a preferred solution of the automatic material pulling and cutting ejector device of the injection mold of the present invention, wherein: the ejection structure includes an ejection assembly and a gear assembly, the gear assembly includes two parallel racks and a ring gear, the two parallel racks are arranged in parallel and mesh with each other through the ring gear; The two groups of parallel racks are respectively a left-position rack and a right-position rack. The right-position rack is connected to the static mold plate. When the dynamic mold plate drives the static mold and the static mold plate to separate through the pulling structure, the dynamic mold plate moving relative to the static mold acts on the right-position rack to drive the right-position rack to engage with the left-position rack, so that the left-position rack is displaced in the opposite direction to extrude the profile, so as to drive the profile and the static mold to loosen.

[0009] As a preferred solution of the automatic material pulling and cutting ejector device of the injection mold of the present invention, wherein: the static mold is provided with overlapping holes in the mold cavity; The ejection assembly includes a telescopic assembly and a mounting base plate. The left rack is movably connected to the mounting base plate through the telescopic assembly. The mounting base plate passes through the static mold. The telescopic assembly stretches the mounting base plate to press on the overlapping holes on the surface of the static mold to seal the overlapping holes.

[0010] As a preferred solution of the automatic pulling and cutting ejector rod device of the injection mold described in the present invention, wherein: the telescopic assembly includes a straight rod movable bracket and a bent rod movable bracket, the straight rod movable bracket and the bent rod movable bracket are both installed between the left rack and the mounting base plate, 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 base plate, the telescopic part of the straight rod movable bracket includes a combined straight rod, the middle part of the combined straight rod is a telescopic rod setting, and two groups of limiting plates are fixed on the surface of the combined straight rod, a spring is fixed between the two groups of limiting plates, the spring is wound on the combined straight rod, and the middle part of the combined straight rod is synchronously contracted or extended by pressing or stretching the two groups of limiting plates.

[0011] As a preferred solution of the automatic material pulling, cutting and ejector device of the injection mold of the present invention, wherein: the bending rod movable bracket includes a connecting portion and a telescopic portion, the telescopic portion of the bending rod movable bracket is configured as a group of combined bending rods, one end of the combined bending rod is connected to the left rack, and the other end is connected to the connecting portion of the bending rod movable bracket; The connecting part of the bent rod movable bracket comprises a spherical base and a semi-circular spherical head rotating in the spherical base, the combined bent rod is connected to the top of the semi-circular spherical head, and the spherical base is fixed on the mounting base plate.

[0012] As a preferred solution of the automatic material pulling and cutting ejector device of the injection mold of the present invention, wherein: the ejection structure includes an action unit and a stretching unit, and the stretching unit is fixedly connected to the action unit; The stretching unit comprises an action plate and a hook spring, one end of the hook spring is connected to the action plate, and the other end of the hook spring is connected to the inner wall of the movable mold.

[0013] As a preferred solution of the automatic material pulling, cutting and ejector rod device of the injection mold described in the present invention, wherein: the material pulling structure includes multiple guide rods 1 and multiple guide rods 2, multiple guide rods 1 are fixed to the four corners of the dynamic mold plate and pass through the static mold and the static mold plate, and the end of the guide rod 1 passing through the static mold plate is fixed to the limiting plate 1; multiple guide rods 2 are fixed to the surface of the static mold plate and pass through the static mold, and the end of the guide rod 2 passing through the static mold is fixed to the limiting plate 2.

[0014] As a preferred solution of the automatic material pulling and cutting ejector device of the injection mold described in the present invention, the ejector structure includes an ejector plate and an ejector connected in one piece, and side support plates are fixed at both ends of the ejector plate, and the side support plates are fixed on the frame structure.

[0015] As a preferred solution of the automatic material pulling, cutting and ejector device of the injection mold of the present invention, wherein: a group of motor mounting seats are supported on the frame structure, and the frame structure supports the power assembly through the motor mounting seats; The power assembly includes a motor, a linkage structure and a rotating structure, wherein the motor drives the rotating structure to rotate through the linkage structure, and the linkage structure includes two sets of pulleys and belts connected to the pulleys, wherein the two sets of pulleys are respectively fixed to the output end of the motor and the two ends of the rotating structure; The rotating structure is a worm structure with smooth ends.

[0016] As a preferred solution of the automatic pulling and cutting ejector rod device of the injection mold described in the present invention, the power assembly also includes an auxiliary structure, which includes a vertical rod and a plurality of 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 movable mold plate and the static mold plate. The rotating structure is jointly supported and engaged by the side plates and vertical rods on the side of the static mold plate, and the rotating structure is threadedly connected to the side plates on the side of the movable mold plate.

[0017] Beneficial effects of the present invention: The present invention sets a demoulding assembly, which includes a push rod structure, a material pulling structure and a demoulding structure. The power assembly drives the movable mold to move away from the static mold to act on the material pulling structure to drive the static mold and the static mold plate to separate. The static mold and the static mold plate that move relatively act on the ejection structure so that the ejection structure is unfolded and acts on the profile to push the profile away from the static mold. The power assembly drives the movable mold plate to move continuously so that the push rod structure penetrates into the active cavity and acts on the ejection structure. The ejection structure moves away from the movable mold to drive the profile to be demoulded. By adopting the movable mold The demoulding structure comprises an ejection structure and a push-out structure. The ejection structure and the push-out structure are designed with adjustable angles to ensure that the forces between the profile and the ejection structure and the push-out structure are evenly distributed, so as to ensure that the push-out force is evenly transmitted in all directions, and to avoid damage to the profile or incomplete demoulding caused by excessive local force, so as to improve the demoulding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 The overall structure of the automatic material pulling and cutting ejector device of the injection mold of the present invention is shown in FIG. Figure 1 ; Figure 2 The overall structure of the automatic material pulling and cutting ejector device of the injection mold of the present invention is shown in FIG. Figure 2 ; Figure 3 It is a sectional view of the overall structure of the automatic material pulling, cutting and ejector device of the injection mold in the present invention; Figure 4 It is a schematic diagram of the overall structure of the stretching unit in the present invention; Figure 5 It is a schematic diagram of the overall structure of the material pulling structure in the present invention; Figure 6 It is a schematic diagram of the overall structure of the static mold structure in the present invention; Figure 7 It is a schematic diagram of the back structure of the static mold in the present invention; Figure 8 It is a front structural schematic diagram of the static mold in the present invention; Fig. 9 It is a partial structural schematic diagram of the push-out structure in the present invention; Fig.10 It is a partial structural axonometric diagram of the push-out structure in the present invention; Fig.11 for Fig.10 A magnified view of the structure of part A; Fig.12 It is a schematic diagram of the overall structure of the ejection component in the present invention; Fig.13 for Fig.12 Enlarged view of the structure of part B.

[0020] 1. Reference numerals: 100, frame structure; 101, motor seat installation; 200, mold assembly; 210, dynamic mold structure; 211, dynamic mold; 212, dynamic mold plate; 213, movable cavity; 220, static mold structure; 221, static mold; 2211, overlapping holes; 222, static mold plate; 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, demoulding 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, action unit; 432, stretching unit; 4321, action plate; 4322, hook spring; 440, ejection structure; 441, ejection assembly; 4411, mounting base plate; 4412, bent rod movable bracket; 44121, combined bent rod; 44122, spherical base; 44123, semicircular ball head; 4413, straight rod movable bracket; 44131, triangle plate; 44132, combined straight rod; 44133, limit plate; 44134, spring; 442, gear assembly; 4421, left rack; 4422, right rack; 4423, ring gear; 4424, support column; 443, mounting bracket. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one 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 term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0024] Example 1

[0025] Reference Figure 1-Figure 12 As shown, it is the first embodiment of the present invention, which provides an automatic material pulling, breaking and ejector device for an injection mold, comprising: Frame structure 100; The mold assembly 200 includes a movable mold structure 210 and a static mold structure 220. The movable mold structure 210 includes a movable mold 211 and a movable mold plate 212. The static mold structure 220 includes a static mold 221 and a static mold plate 222. The movable mold 211 is assembled on the movable mold plate 212. The static mold 221 is assembled on the static mold plate 222. A movable cavity 213 is formed between the movable mold 211 and the movable mold plate 212. A working cavity 223 is formed between the static mold 221 and the static mold plate 222. The static mold plate 222 is fixed on the frame structure 100 and its position remains unchanged. A power assembly 300, wherein the power assembly 300 is used to drive the movable mold structure 210 to move toward or away from the static mold structure 220, the movable mold 211 synchronizes the movable mold plate 212 to move toward the static mold 221, so that the movable mold 211 and the static mold 221 are closely fitted, and a cavity for forming a profile is formed between the static mold 221 and the movable mold 211, and the movable mold 211 synchronizes the movable mold plate 212 to move away from the static mold 221, so that the movable mold 211 and the static mold 221 are separated, and the profile is ejected from the cavity; The demoulding assembly 400 includes a push rod structure 410, a material pulling structure 420 and a demoulding structure. The demoulding structure includes an ejection structure 430 and a push-out structure 440. The ejection structure 430 is installed in the movable cavity 213 and penetrates the movable mold 211 to push the profile out of the cavity. The push-out structure 440 is installed in the working cavity 223 to push the profile to separate from the static mold plate 222. The push rod structure 410 is fixed to the frame structure 100, the material pulling structure 420 is arranged on the static mold 221 and the static mold plate 222, and the power assembly 300 drives the movable mold 211 to move away from the static mold 22 The static mold 221 and the static mold plate 222 move relative to each other to act on the material pulling structure 420, so as to drive the static mold 221 and the static mold plate 222 to separate, the profile is separated from the material of the fluoroplastic injection port, and the profile is disconnected from the fluoroplastic. The static mold 221 and the static mold plate 222 that move relative to each other act on the ejection structure 440, so that the ejection structure 440 is unfolded and acts on the profile to push the profile away from the static mold 221. The power assembly 300 drives the dynamic mold plate 212 to continuously move so that the ejector structure 410 penetrates into the active cavity 213 and acts on the ejection structure 430. The ejection structure 430 moves away from the dynamic mold 211 to drive the profile to be demolded.

[0026] like Figure 9-12 As shown, the ejection structure 440 includes an ejection assembly 441 and a gear assembly 442. The gear assembly 442 includes two parallel racks and a ring gear 4423. 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. The right rack 4422 is connected to the static mold plate 222. When the dynamic mold plate 212 drives the static mold 221 and the static mold plate 222 to separate through the pulling structure 420, the dynamic mold plate 212 moving relative to the static 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 is displaced in the opposite direction to extrude the profile, so as to drive the profile and the static mold 221 to loosen.

[0027] The ejection structure 440 further includes a mounting frame 443 disposed in the working chamber 223 . The mounting frame 443 is used to engage with the parallel racks to drive the parallel racks to directional displacement. A support column 4424 is mounted on the mounting frame 443 . The mounting frame 443 supports the ring gear 4423 through the support column 4424 .

[0028] like Figure 8 As shown, the static mold 221 is located in the mold cavity and is provided with overlapping holes 2211; like Fig.12 As shown, the ejection assembly 441 includes a telescopic assembly and a mounting base plate 4411. The left rack 4421 is movably connected to the mounting base plate 4411 through the telescopic assembly. The mounting base plate 4411 passes through the static mold 221. The telescopic assembly stretches the mounting base plate 4411 and presses it on the overlapping hole 2211 on the surface of the static mold 221 to seal the overlapping hole 2211.

[0029] The telescopic assembly includes a straight rod movable bracket 4413 and a bent rod movable bracket 4412, both of which are installed between the left rack 4421 and the mounting base plate 4411. The straight rod movable bracket 4413 includes a connecting portion and a telescopic portion. The connecting portion of the straight rod movable bracket 4413 includes two triangular plates 44131, which are respectively hinged to the left rack 4421 and the surface of the mounting base plate 4411. The telescopic part of the movable bracket 4413 includes a combined straight rod 44132, the middle part of the combined straight rod 44132 is a telescopic rod setting, and two groups of limiting plates 44133 are fixed on the surface of the combined straight rod 44132, and a spring 44134 is fixed between the two groups of limiting plates 44133. The spring 44134 is wound around the combined straight rod 44132. By pressing or stretching the two groups of limiting plates 44133, the middle part of the combined straight rod 44132 can be synchronously contracted or extended.

[0030] 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 group 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. Fig.12 , Fig.13 As shown, the combined curved rod 44121 and the combined straight rod 44132 have the same structure, but the rod body of the combined curved rod 44121 is bent; The connection portion of the bent rod movable bracket 4412 includes 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 .

[0031] Specifically, during the injection molding process, the movable mold 211 and the static mold 221 fit tightly together to form a cavity. After the molten plastic is injected into the cavity, it is cooled and solidified to form a profile. When the profile is formed, the power assembly 300 drives the movable mold 211 and the movable template 212 to move away from the static mold 221. The movable mold 211 and the movable template 212 transmit force to the static mold 221 and the static template 222 through the pulling structure 420, resulting in relative movement between the static mold 221 and the static template 222. When the static mold 221 and the static template 222 move relative to each other, the right rack 4422 moves away from or close to the static mold 221 with the relative movement of the static template 222, and then through the meshing action of the ring gear 4423, the left rack 4421 is driven to move in the opposite direction. The reversely displaced left rack 4421 applies pressure to the ejection component 441.

[0032] When the left rack 4421 is displaced in the reverse direction, the straight rod movable bracket 4413 and the bent rod movable bracket 4412 will be compressed and shortened, and at the same time, the straight rod movable bracket 4413 and the bent rod movable bracket 4412 act on the mounting base plate 4411, thereby pushing the mounting base plate 4411 to move forward, and the mounting base plate 4411 penetrates the static mold 221. The front end of the mounting base plate 4411 will directly contact the profile and touch the profile, so that the connection between the profile and the static mold 221 is loosened. When the dynamic mold 211 and the static mold 221 are separated, the profile is brought away from the static mold 221 by the dynamic mold 211 to ensure that the profile is connected to the dynamic mold 211 when the dynamic mold 211 and the static mold 221 are opened.

[0033] Among them, during the process of injecting molten plastic into the cavity, the movable mold 211, the movable mold plate 212, the static mold 221 and the static mold plate 222 are in a state of fitting together, the straight rod movable bracket 4413 and the bent rod movable bracket 4412 are stretched, and the straight rod movable bracket 4413 and the bent rod movable bracket 4412 stretch the mounting base plate 4411 through the pulling force, so that the mounting base plate 4411 is tightly pressed on the overlapping hole 2211 on the surface of the static mold 221, ensuring the sealing of the cavity.

[0034] Among them, the setting of the triangle plate 44131, the spherical base 44122, and the semicircular ball head 44123 is to give the mounting base plate 4411 a certain angle adjustability, so as to ensure that the force between the profile and the mounting base plate 4411 can be evenly distributed; specifically, after the profile is formed in the static mold 221, the front end of the mounting base plate 4411 directly contacts the profile to touch the profile, so that the connection between the profile and the static mold 221 is loosened. Since there are differences in the bonding strength between the profile and the static mold 221 at different positions, the difficulty of disengagement at different positions where the profile is connected to the static mold 221 is different. Therefore, the hinged design of the triangle plate 44131 allows the mounting base plate 4411 to make slight angle adjustments during the ejection process to ensure that the mounting base plate 4411 rotates following the profile, to ensure that the ejection force can be evenly transmitted in all directions, and at the same time avoid local excessive force causing profile damage or incomplete demolding, so as to improve the efficiency of demolding.

[0035] like Figure 4 As shown, the ejection structure 430 includes 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 includes 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 .

[0036] Specifically, the action unit 431 is composed of a mounting frame 443, a left-position rack 4421 and an ejection assembly 441, wherein the structure and connection relationship between the mounting frame 443, the left-position rack 4421 and the ejection assembly 441 have been specifically described above and will not be repeated here. The mounting frame 443, the left-position rack 4421 and the ejection assembly 441 in the action unit 431 and the mounting frame 443, the left-position rack 4421 and the ejection assembly 441 in the ejection structure 440 are not the same, but have the same structure.

[0037] Specifically, the mounting frame 443 in the action unit 431 is fixed in the movable mold 211 and limits the movement direction of the ejection assembly 441 .

[0038] The material pulling structure 420 includes multiple guide rods 421 and multiple guide rods 422. The multiple guide rods 421 are fixed to the four corners of the dynamic mold 212 and penetrate the static mold 221 and the static mold 222. The end of the guide rod 421 passing through the static mold 222 is fixed to the limiting plate 4211; the multiple guide rods 422 are fixed to the surface of the static mold 222 and penetrate the static mold 221. The end of the guide rod 422 passing through the static mold 221 is fixed to the limiting plate 4221.

[0039] Specifically, when the movable mold 211 drives the guide rod 1 421 to move away from the static mold 221, the limit plate 1 4211 gradually approaches the static mold plate 222 and passes through the static mold plate 222, penetrates into the static mold 221, and abuts against the static mold 221 to drive the static mold 221 and the static mold plate 222 to separate; secondly, when the static mold 221 moves away from the static mold plate 222, the limit plate 2 4221 gradually approaches the static mold 221 and abuts against the static mold 221 to limit the static mold 221, so that the static mold 221 and the movable mold 211 are separated, and the profile is removed.

[0040] like Figure 3 As shown, the ejector structure 410 includes an ejector plate 411 and an ejector 412 which are integrally connected. Side support plates 413 are fixed at both ends of the ejector plate 411. The side support plates 413 are fixed on the frame structure 100. When the power assembly 300 drives the movable mold plate 212 to move away from the static mold plate 222, the ejector 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 toward the movable mold 211, so as to drive the profile to separate from the movable mold 211 and remove the profile.

[0041] like Figure 1 As shown, the frame structure 100 supports a group of motor mounting seats 101, and the frame structure 100 supports the power assembly 300 by mounting the motor mounting seats 101; 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 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.

[0042] The power assembly 300 also includes an auxiliary structure 340, which includes a vertical rod 341 and a plurality of 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 movable template 212 and the static template 222. 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. The rotating structure 330 is threadedly connected to the side plates 342 on the side of the movable template 212.

[0043] Specifically, after the profile is formed in the static mold 221, the power assembly 300 starts to drive the movable mold 211 and the movable platen 212 to move away from the static mold 221. In this process, the movable mold 211 and the movable platen 212 transmit force to the static mold 221 and the static platen 222 through the material pulling structure 420, resulting in relative movement between the static mold 221 and the static platen 222.

[0044] Specifically, as the movable mold 211 and the movable plate 212 move, the right rack 4422 moves away from or close to the movable mold 211 as the movable mold 211 moves, and then drives the left rack 4421 to move in the opposite direction through the meshing action of the ring gear 4423. The reversely displaced left rack 4421 applies pressure to the ejection assembly 441. When the left rack 4421 moves toward the static mold 221, the straight rod movable bracket 4413 and the bent rod movable bracket 4412 are compressed and shortened, and at the same time, the straight rod movable bracket 4413 and the bent rod movable bracket 4412 act on the mounting base plate 4411, pushing the mounting base plate 4411 to move forward. The mounting base plate 4411 penetrates the static plate 222, and its front end directly contacts the profile, touches the profile, and loosens the connection between the profile and the static mold 221. In this process, the profile acts on the movable mold 211, so that a certain gap is generated between the static mold 221 and the movable mold 211.

[0045] As the movable mold 211 and the movable mold plate 212 continue to move away from the static mold 221, the profile follows the displacement of the movable mold 211, and the ejector structure 410 gradually enters the active cavity 213 and acts on the ejection structure 430. The ejection structure 430 moves away from the movable mold 211, further pushing the profile out of the cavity.

[0046] When the movable mold 211 stops moving, the profile is separated from the static mold 221 by the ejection structure 430 .

[0047] In the process of gradual separation of the movable mold 211 and the static mold 221, the device ensures efficient demoulding of the profile through the synergistic effect of the ejection structure 440 and the ejection structure 430, reduces the demoulding time, and improves production efficiency. Moreover, a set of power sources, namely the motor 310, is used, and there is no need for too much power equipment to cooperate with each other, thereby simplifying the structure.

[0048] The design of the triangular plate 44131, the spherical base 44122, and the semicircular ball head 44123 endows the mounting base plate 4411 with a certain degree of angle adjustability, ensuring that the push-out force is evenly distributed in all directions, thereby avoiding damage to the profile or incomplete demoulding caused by excessive local force.

[0049] Of course, the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and equal changes and improvements made by ordinary technicians in the technical field within the essential scope of the present invention should all fall within the scope of the patent coverage of the present invention.

[0050] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change; Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other; Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in 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 move continuously 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.

2. The automatic material pulling, cutting and ejector device for injection mold according to claim 1, characterized in that: 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). 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 engage 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.

3. The automatic material pulling, cutting and ejector device for the injection mold according to claim 2, characterized in that: The static mold (221) is provided with overlapping holes (2211) in the mold cavity; 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 mounting base plate (4411) penetrates the static mold (221); the telescopic assembly stretches the mounting base plate (4411) to press against the overlapping hole (2211) on the surface of the static mold (221) to seal the overlapping hole (2211).

4. The automatic material pulling, cutting and ejector device for the injection mold according to claim 3, characterized in that: The telescopic assembly comprises a straight rod movable bracket (4413) and a bent rod movable bracket (4412), wherein the straight rod movable bracket (4413) and the bent rod movable bracket (4412) are both installed between the left rack (4421) and the mounting base plate (4411), wherein the straight rod movable bracket (4413) comprises a connecting portion and a telescopic portion, wherein the connecting portion of the straight rod movable bracket (4413) comprises two triangular plates (44131), wherein the two triangular plates (44131) are respectively hinged to the left rack (4421) and the surface of the mounting base plate (4411), wherein the straight rod movable bracket (4413) comprises a connecting portion and a telescopic portion. The telescopic portion of the rod movable bracket (4413) comprises a combined straight rod (44132), the middle portion 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 around the combined straight rod (44132), and the middle portion of the combined straight rod (44132) is synchronously contracted or extended by pressing or stretching the two groups of limiting plates (44133).

5. The automatic material pulling, cutting and ejector device for the injection mold according to claim 4, characterized in that: 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).

6. The automatic material pulling, cutting and ejector device for the injection mold according to claim 5, 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).

7. The automatic material pulling, cutting and ejector device for the injection mold according to claim 6, 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).

8. The automatic material pulling, cutting and ejector device for injection mold according to claim 6, 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).

9. The automatic material pulling, cutting and ejector device for injection mold according to claim 7, 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.

10. The automatic material pulling, cutting and ejector device for the injection mold according to claim 9, 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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