High-wear-resistance mold for plastic processing

Abstract

The invention relates to the field of plastic molds, and discloses a high-wear-resistance mold for plastic processing, the high-wear-resistance mold comprises a lower mold and an upper mold, the lower mold is provided with a mold core for workpiece forming, the mold core comprises a first insert, a second insert and a third insert which are attached to one another, and the second insert and the third insert are both in sliding fit with the lower mold; a supporting assembly used for supporting the first insert, the second insert and the third insert is arranged in the lower die, and a control assembly used for driving the supporting assembly to move is further arranged in the lower die. Through cooperation of the first insert, the second insert, the supporting assembly, the control assembly and the like, the first insert, the second insert and the third insert can be sequentially separated from a workpiece, and then rapid demolding of the workpiece is achieved; and the second insert and the third insert are separated from the workpiece in the form of translation along the top surface of the lower mold, so that the damage to the arc edge of the workpiece can be effectively reduced, and the overall quality of the demolded workpiece is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of plastic molds, and in particular to a high wear-resistant mold for plastic processing. Background Art

[0002] The production of mobile phone cases is mostly completed by injection molding. During injection molding, since the inside of the mobile phone case is concave and has a certain curvature at the edge, it is easy to fit on the mold surface and buckle inside the mold cavity after injection molding. The existing demoulding method is to manually or by equipment to remove the mobile phone case in the mold cavity to separate it from the mold.

[0003] For example, Chinese patent publication number CN117341148A discloses an injection molding mold and its three-proof mobile phone case, which includes a fixed mold plate, a cross mold plate, a block mold plate, a movable frame, a cross plate and a circular plate. An injection molding groove is provided on one side of the fixed mold plate, and an injection molding hole is provided on the other side of the fixed mold plate. A cross mold plate is provided on one side of the fixed mold plate, and block mold plates are provided at the four corners of the cross mold plate. The block mold plates are fixedly connected with guide pillars inside, and the cross mold plate and the four block mold plates form a movable mold plate. In the process of demolding, by first moving the cross mold plate and then approaching the movable mold plate, the contact area between the mobile phone case and the convex module after injection molding is gradually reduced, and the adhesion area between the mobile phone case and the mold is reduced, so that the mobile phone case can be blown off by an air gun or the like, and easily separated from the mold, thereby improving the processing efficiency of the mobile phone mold.

[0004] This application realizes demoulding by first moving the cross template and then bringing the movable templates closer to each other. However, the horizontal movement of the cross template will cause damage to the arc edge of the mobile phone case, thereby affecting the overall quality of the mobile phone case, and there are certain limitations in use.

[0005] Therefore, it is necessary to provide a high wear-resistant mold for plastic processing to solve the above technical problems. Summary of the invention

[0006] The object of the present invention is to provide a highly wear-resistant mold for plastic processing to solve the problems raised in the above background technology.

[0007] To achieve the above purpose, a highly wear-resistant mold for plastic processing is designed, which can effectively reduce the damage to the arc edge of a mobile phone case.

[0008] Based on the above ideas, the present invention provides the following technical solutions: a highly wear-resistant mold for plastic processing, comprising a lower mold and an upper mold, the lower mold is provided with a mold core for workpiece molding, the mold core comprises a first insert, a second insert and a third insert which fit each other, and the second insert and the third insert both slide with the lower mold, the interior of the lower mold is provided with a support assembly for supporting the first insert, the second insert and the third insert, and the interior of the lower mold is also provided with a control assembly for driving the support assembly to move; starting the control assembly through the support assembly can first drive the first insert and the second insert to be successively retracted into the lower mold, and then drive the third insert to translate and close along the top surface of the lower mold.

[0009] As a further solution of the present invention: the number of the first insert, the second insert and the third insert are one, two and four respectively, and the first insert is located at the center, the two second inserts are located on the upper and lower sides of the first insert, and the four third inserts are distributed around the first insert.

[0010] As a further solution of the present invention: the surface of the lower mold is provided with an opening for accommodating the support assembly and the control assembly, and the overall size of the opening is larger than the overall size of the first insert.

[0011] As a further solution of the present invention: the top surface of the lower mold is provided with a slide groove for the second insert and the third insert to slide, and the bottom of the second insert and the third insert are movably mounted with rollers that slide in cooperation with the slide groove, and the cross-section of the slide groove is an inverted T-shaped or dovetail groove design.

[0012] As a further solution of the present invention: the slide groove corresponding to the second insert extends into the opening and is designed in an L-shape as a whole, so that the second insert can first be translated based on the top surface of the lower mold, and then slide from the opening into the lower mold; the slide groove corresponding to the third insert is arranged to be inclined as a whole based on the top surface of the lower mold, and is inclined to point in the direction of the first insert, so that the four third inserts have a tendency to close to the center when moving.

[0013] As a further solution of the present invention: the support assembly includes a cross bar fixedly connected to the first insert, the outer surface of the cross bar is provided with a first ring and a second ring, the first ring is located between the second ring and the first insert, the surface of the first ring is rotatably mounted with a first connecting rod rotatably matched with the second insert, and the surface of the second ring is rotatably mounted with a second connecting rod rotatably matched with the third insert.

[0014] As a further solution of the present invention: the first connecting rod on the first ring and the second connecting rod on the second ring are staggered based on the circumferential direction of the cross bar.

[0015] As a further solution of the present invention: the control component includes three cylinders fixedly installed in the opening, the output shaft of the first cylinder is fixedly connected to the cross bar, the output shaft of the second cylinder is fixedly connected to the first ring, and the output shaft of the third cylinder is fixedly connected to the second ring.

[0016] As a further solution of the present invention: the surface of one of the third inserts is elastically connected to the fourth insert via a first spring, and the surface of the fourth insert is fixedly mounted with a first pull rope fixedly connected to the first insert; when the first insert shrinks into the lower mold, the first pull rope can drive the fourth insert to shrink into the third insert and squeeze the first spring.

[0017] As a further solution of the present invention: the middle of the first insert is circular and has protrusions formed outwardly on the upper and lower sides, and the width of the protrusions is equal to and adapted to the width of the second insert.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: through the cooperation between the first insert, the second insert, the support assembly and the control assembly, the first insert, the second insert and the third insert can be separated from the workpiece in sequence, thereby realizing rapid demolding of the workpiece; and the separation of the second insert and the third insert from the workpiece adopts the form of translation along the top surface of the lower mold, which can effectively reduce the damage to the arc edge of the workpiece, ensure the overall quality of the workpiece after demolding, and has higher practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a three-dimensional diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the lower mold of the present invention; Figure 3 It is a schematic diagram of the crossbar and opening structure of the present invention; Figure 4 It is a schematic diagram of the split structure of the cross bar, the first ring and the second ring of the present invention; Figure 5 It is a schematic diagram of the lower die and the slide groove structure of the present invention; Figure 6 for Figure 5 A magnified view of the structure at center; Figure 7 It is a schematic structural diagram of the first insert, the second insert and the third insert of the present invention; Figure 8 It is a schematic diagram of the structure of the third insert and the fourth insert of the present invention; Fig. 9 It is a schematic diagram of the first insert and the first pull rope structure of the present invention; Fig.10 It is a schematic diagram of the bottom plate and top rod structure of the present invention; Fig.11 It is a schematic diagram of the structure of the second pull rope and the reversing wheel of the present invention.

[0020] In the figure: 1, lower mold; 2, upper mold; 3, mold core; 4, support assembly; 5, control assembly; 6, roller; 7, bottom plate; 8, push rod; 9, second pull rope; 10, reversing wheel; 101, opening; 102, slide groove; 301, first insert; 302, second insert; 303, third insert; 304, fourth insert; 305, groove; 306, first spring; 307, first pull rope; 401, cross bar; 402, first ring; 403, second ring; 404, first connecting rod; 405, second connecting rod. DETAILED DESCRIPTION

[0021] Embodiment 1: See also Figures 1 to 6 The embodiment of the present invention provides a high wear-resistant mold for plastic processing, which is mainly used to realize the rapid demoulding of mobile phone shells and effectively avoid the damage of mobile phone shells. It includes a lower mold 1 and an upper mold 2 that are adapted to each other, and a mold core 3 for molding the mobile phone shell is arranged on the lower mold 1. When the upper mold 2 and the lower mold 1 are closed, the mobile phone shell can be automatically molded with the mold core 3; in this embodiment, the upper mold 2 and the lower mold 1 are arranged sideways, and the upper mold 2 and the lower mold 1 can be made of heat-treated P20 steel with good wear resistance. Both are existing mature technologies and will not be described in detail here.

[0022] Furthermore, the mold core 3 includes a first insert 301, a second insert 302, and a third insert 303 that fit each other, and the second insert 302 and the third insert 303 are in sliding cooperation with the lower mold 1, and a support assembly 4 for supporting the first insert 301, the second insert 302, and the third insert 303 is provided inside the lower mold 1, and a control assembly 5 for driving the support assembly 4 to move is also provided inside the lower mold 1. When the control assembly 5 is started, through the support assembly 4, the first insert 301 can be driven to shrink into the lower mold 1 first, and then the second insert 302 can be driven to be retracted into the lower mold 1, and finally the third insert 303 can be driven to be relatively close to the mobile phone shell to complete separation.

[0023] In this embodiment, there is one first insert 301 and it is located in the middle, there are two second inserts 302 and they are located on the upper and lower sides of the first insert 301, and there are four third inserts 303 and they are distributed around the first insert 301. The first insert 301, the two second inserts 302 and the four third inserts 303 are combined to form a mobile phone case mold core 3 for forming a mobile phone case.

[0024] Among them, the surface of the lower mold 1 is provided with an opening 101 for the placement of the support component 4 and the control component 5. The support component 4 is used to support the first insert 301, the second insert 302 and the third insert 303 through the opening 101, and the size of the opening 101 is larger than the size of the first insert 301, so that the first insert 301 can be directly moved based on the opening 101.

[0025] Reference Figures 4 to 6 In the present embodiment, preferably: the top surface of the lower mold 1 is provided with a slide groove 102 for the second insert 302 and the third insert 303, wherein the slide groove 102 corresponding to the second insert 302 extends into the opening 101 and is designed in an L-shape as a whole, so that the second insert 302 can first slide translationally based on the top surface of the lower mold 1, and then slide from the opening 101 to the inside of the lower mold 1, and the moving stroke of the two second inserts 302 here is: first relatively close, then change direction at the junction of the slide groove 102, and then slide from the opening 101 to the inside of the lower mold 1 after changing direction.

[0026] The slide groove 102 corresponding to the third insert 303 is designed to be inclined based on the top surface of the lower mold 1 as a whole, and is inclined to point in the direction of the first insert 301, so that the third insert 303 slides based on the top surface of the lower mold 1 and slides inclined toward the first insert 301, thereby making the four third inserts 303 tend to converge toward the center when moving.

[0027] Correspondingly, the bottom of the second insert 302 and the third insert 303 are movably installed with a roller 6 that slides with the slide groove 102. The roller 6 can translate and rotate in the slide groove 102 without falling off; accordingly, the cross-section of the slide groove 102 can be designed in an inverted T shape, or a dovetail groove design, etc.

[0028] Reference Figures 2 to 4 In this embodiment, preferably: the support assembly 4 includes a cross bar 401 fixedly connected to the first insert 301, the outer surface of the cross bar 401 is sleeved with a first ring 402 and a second ring 403, the first ring 402 is located between the second ring 403 and the first insert 301, the surface of the first ring 402 is rotatably mounted with a first connecting rod 404 rotatably matched with the second insert 302, and the surface of the second ring 403 is rotatably mounted with a second connecting rod 405 rotatably matched with the third insert 303.

[0029] In order to match the number, the number of the first connecting rod 404 and the number of the second connecting rod 405 are two and four respectively, and the first connecting rod 404 and the second connecting rod 405 are staggered in the opening 101, so that the movement of the first connecting rod 404 driven by the first ring 402 and the movement of the second connecting rod 405 driven by the second ring 403 will not interfere with each other. The first ring 402 can drive the second insert 302 to move along the slide groove 102 through the first connecting rod 404, and the second ring 403 can drive the third insert 303 to move along the slide groove 102 through the second connecting rod 405.

[0030] The shape of the first ring 402 can be configured to match the first insert 301, so that the movement of the first connecting rod 404 driven by the first ring 402 will not interfere with the first insert 301, nor will it interfere with the moved first insert 301. The crossbar 401, the first ring 402 and the second ring 403 are all driven by the control assembly 5 to complete the corresponding movement.

[0031] Reference Figures 2 to 4 In this embodiment, preferably: the control component 5 includes three cylinders fixedly installed in the opening 101, the output shaft of the first cylinder is fixedly connected to the cross bar 401, the output shaft of the second cylinder is fixedly connected to the first ring 402, and the output shaft of the third cylinder is fixedly connected to the second ring 403.

[0032] Among them, the first cylinder is started first to drive the cross bar 401 and the first insert 301 to shrink into the lower mold 1, and provide space for the movement of the two second inserts 302; then the second cylinder drives the first ring 402 to move, and drives the two second inserts 302 to translate toward the top surface of the lower mold 1 through the first connecting rod 404, and then turns and retracts into the lower mold 1 from the opening 101, and provides space for the movement of the four third inserts 303; finally, the third cylinder drives the second ring 403 to move, and drives the four third inserts 303 to translate and close along the top surface of the lower mold 1 toward the center through the second connecting rod 405, completing separation and demoulding from the mobile phone case.

[0033] When in use, the upper mold 2 and the lower mold 1 are closed and the mobile phone case is formed through the mold core 3, then the upper mold 2 is moved away and the mobile phone case is clamped on the mold core 3. Then the first cylinder is started to drive the cross bar 401 and the first insert 301 to be retracted into the lower mold 1, and the second cylinder is started again to drive the first ring 402 to move, and the two second inserts 302 are also retracted into the lower mold 1 through the first connecting rod 404, the slide groove 102 and the roller 6, and finally the third cylinder is started to drive the second ring 403 to move, and the four third inserts 303 are driven to translate and close along the top surface of the lower mold 1 through the second connecting rod 405, the slide groove 102 and the roller 6.

[0034] During this process, the first insert 301 is retracted into the lower mold 1 from the center of the mold core 3 without causing damage to the mobile phone case. The second insert 302 is first translated along the top surface of the lower mold 1 and then retracted into the lower mold 1. It can be translated and separated from the arc edge of the mobile phone case without causing damage to the mobile phone case. The third insert 303 is translated and closed along the top surface of the lower mold 1, thus completing the overall demoulding from the mobile phone case, and can also be translated and separated from the arc edge of the mobile phone case without causing damage to the mobile phone case.

[0035] In this embodiment, the first insert 301 is in the shape of a keyhole as a whole, that is, it is circular in the middle and has protrusions on the upper and lower sides. The width of the protrusions is adapted to the width of the second insert 302. The shape design of the first insert 301 allows the two second inserts 302 to have space to first translate closer to each other and then be retracted into the lower mold 1 from the opening 101.

[0036] Further, such as Figure 7 As shown, the middle of the first insert 301 can also be designed in an elliptical shape, and both the upper and lower sides are formed inwardly with depressions. In this case, the length dimension of the second insert 302 in the up-down direction is greatly shortened, so that the second insert 302 only needs to translate along the top surface of the lower mold 1 to form a space for the third insert 303 to translate and close along the top surface of the lower mold 1. In this case, there is no need to set the slide groove 102 corresponding to the second insert 302 in an L shape, nor is there any need to store the second insert 302 in the lower mold 1. The second insert 302 and the third insert 303 both translate along the top surface of the lower mold 1.

[0037] To sum up, through the cooperation of structures such as the first insert 301, the second insert 302, the cross bar 401 and the slide groove 102, the first insert 301, the second insert 302 and the third insert 303 can be separated from the mobile phone case in sequence, thereby realizing rapid demolding of the mobile phone case; and the separation of the second insert 302 and the third insert 303 from the mobile phone case adopts the form of translation along the top surface of the lower mold 1, which can effectively reduce the damage to the arc edge of the mobile phone case, ensure the overall quality of the mobile phone case after demolding, and has higher practicality.

[0038] Embodiment 2: See also Figures 1 to 9 On the basis of the first embodiment, considering that some mobile phone cases are often formed with concave holes on their inner walls corresponding to the positions of the third inserts 303 in order to adapt to the protruding cameras of the mobile phones, the presence of the concave holes affects the translation of the third inserts 303 along the top surface of the lower mold 1, thereby affecting the overall demolding of the workpiece.

[0039] To this end, one of the third inserts 303 is improved: now the surface of one of the third inserts 303 is elastically connected to the fourth insert 304 via the first spring 306, and the surface of the fourth insert 304 is also fixedly installed with a first drawstring 307 fixedly connected to the first insert 301. When the first insert 301 is driven to shrink into the lower mold 1 through the cross bar 401, the fourth insert 304 can also be pulled by the first drawstring 307, so that the fourth insert 304 shrinks into the third insert 303 and squeezes the first spring 306. At this time, the third insert 303 is limited by the second insert 302 and cannot move.

[0040] The surface of the third insert 303 is provided with a groove 305 for accommodating the fourth insert 304 and the first spring 306 . The pull rope extends from the groove 305 to the outside of the third insert 303 and is fixedly connected to the first insert 301 .

[0041] When in use, through the structures such as the first insert 301, the second insert 302 and the slide 102, the rapid demoulding of the mobile phone shell can be achieved and the damage to the arc edge of the mobile phone shell can be effectively reduced. The working process and effect of this part are the same as those in the first embodiment, and will not be repeated here. The difference is that when the upper mold 2 and the lower mold 1 are molded, the fourth insert 304 can adapt to the position of the mobile phone camera to provide space for its molding. When the first cylinder starts to drive the cross bar 401 and the first insert 301 to be received in the lower mold 1, the first insert 301 also pulls the fourth insert 304 through the first pull rope 307, so that the fourth insert 304 is received in the groove 305. When the third cylinder drives the third insert 303 to translate along the top surface of the lower mold 1 through the second ring 403, the second connecting rod 405, the slide 102 and the roller 6, the fourth insert 304 will not interfere with the third insert 303 due to the completion of the contraction.

[0042] Compared with the first embodiment, through the cooperation of the first insert 301, the fourth insert 304, the pull rope and the first spring 306, the fourth insert 304 can also be automatically contracted based on the third insert 303 after the first insert 301 moves, which can avoid affecting the subsequent translation and closing of the third insert 303 along the top surface of the lower mold 1, thereby adapting to the molding requirements of the camera, ensuring rapid demoulding, and avoiding damage to the camera of the mobile phone case. The overall solution is combined with the movement of the first insert 301, and the contraction avoidance solution of the fourth insert 304 can also be used for the volume key and power button of the mobile phone case, so the overall applicability is stronger.

[0043] Embodiment three: See also Figures 1 to 11 On the basis of the second embodiment, considering that the mobile phone case is still suspended on the two upper third inserts 303 after the third inserts 303 are translated and closed, a blanking structure is required in the subsequent process, which increases the production cost and reduces the overall work efficiency.

[0044] To this end, the lower mold 1 is improved: now the lower mold 1 is slidably installed with a bottom plate 7 and a top rod 8, the bottom plate 7 is located below the two third inserts 303 at the bottom, and the top rod 8 corresponds to the position of the second insert 302 at the top. The ends of the bottom plate 7 and the top rod 8 located in the lower mold 1 are fixedly installed with a second pull rope 9, the movable end of the second pull rope 9 on the bottom plate 7 is fixedly connected to the cross bar 401, and the movable end of the second pull rope 9 on the top rod 8 is fixedly connected to the second ring 403. A reversing wheel 10 for the second pull rope 9 to be placed is rotatably installed inside the lower mold 1, so that when the cross bar 401 / the second ring 403 moves, the second pull rope 9 can be released or pulled accordingly, and the two sets of second pull ropes 9 and reversing wheels 10 can be staggered, which will not affect the movement of other structures.

[0045] At the same time, a second spring (not shown in the figure) is fixedly installed between the bottom plate 7 and the top rod 8 and the lower mold 1. The second spring makes the bottom plate 7 and the top rod 8 tend to extend out of the lower mold 1, and in the initial state, the ends of the bottom plate 7 and the top rod 8 are flush with the top surface of the lower mold 1.

[0046] During use, the mobile phone case can be quickly demoulded and the damage to the arc edge of the mobile phone case can be effectively reduced through the structures such as the first insert 301, the second insert 302 and the slide groove 102; the fourth insert 304 and the first spring 306 can realize the automatic contraction of the fourth insert 304 based on the third insert 303, so as to avoid affecting the subsequent translation and closing of the third insert 303 along the top surface of the lower mold 1. The working process and effect of this part are the same as those in Example 2 and will not be repeated here. The difference is: when the cross bar 401 moves, the corresponding second pull rope 9 is released, and the second spring makes the bottom plate 7 extend from the lower mold 1 first and support the mobile phone case; when the second ring 403 moves, the corresponding second pull rope 9 is also released, and the second spring makes the push rod 8 extend from the position of the second insert block 302 corresponding to the upper part of the lower mold 1, and with the translation and closing of the four third insert blocks 303, the push rod 8 can push the mobile phone case out along the axial direction of the cross bar 401 based on the top surface of the bottom plate 7, and completely separate it from the third insert block 303.

[0047] Compared with the second embodiment, through the cooperation of the bottom plate 7, the top rod 8, the cross bar 401 and the second ring 403, when the cross bar 401 moves, it not only drives the first insert 301 to move, but also drives the bottom plate 7 to extend from the lower mold 1 to support the mobile phone shell; when the second ring 403 moves, it not only drives the fourth insert 304 to move, but also drives the top rod 8 to extend from the position corresponding to the second insert 302 above, and pushes the mobile phone shell out of the lower mold 1 to achieve complete separation, which can further improve the overall demoulding efficiency. The overall solution is combined with the movement of the cross bar 401 and the second ring 403. The bottom plate 7 is located below the third insert 303 and the top rod 8 is blocked by the second insert 302, so it will not affect the molding of the mobile phone shell, which can ensure the molding quality of the mobile phone shell and meet more needs in actual use.

Claims

1. A highly wear-resistant mold for plastic processing, comprising a lower mold and an upper mold, characterized in that: The lower die is provided with a die core for forming a workpiece, the die core includes a first insert, a second insert and a third insert which fit each other, and the second insert and the third insert are both slidably matched with the lower die, a support assembly for supporting the first insert, the second insert and the third insert is provided inside the lower die, and a control assembly for driving the support assembly to move is also provided inside the lower die; starting the control assembly through the support assembly can first drive the first insert and the second insert to be retracted into the lower die in sequence, and then drive the third insert to translate and close along the top surface of the lower die.

2. The high wear-resistant mold for plastic processing according to claim 1, characterized in that: The number of the first insert, the second insert and the third insert are one, two and four respectively, and the first insert is located at the center, the two second inserts are located at the upper and lower sides of the first insert, and the four third inserts are distributed around the first insert.

3. The high wear-resistant mold for plastic processing according to claim 2, characterized in that: The surface of the lower mold is provided with an opening for accommodating the support component and the control component, and the overall size of the opening is larger than the overall size of the first insert.

4. The high wear-resistant mold for plastic processing according to claim 3, characterized in that: The top surface of the lower mold is provided with a slide groove for the second insert and the third insert to slide. The bottom of the second insert and the third insert are movably mounted with rollers that slide with the slide groove. The cross section of the slide groove is in an inverted T-shape or dovetail groove design.

5. The high wear-resistant mold for plastic processing according to claim 4, characterized in that: The slide groove corresponding to the second insert extends into the opening and is designed in an L-shape as a whole, so that the second insert can first translate based on the top surface of the lower mold, and then slide from the opening into the lower mold; the slide groove corresponding to the third insert is set at an angle based on the top surface of the lower mold as a whole, and is tilted in the direction of the first insert, so that the four third inserts tend to converge toward the center when moving.

6. The high wear-resistant mold for plastic processing according to claim 2, characterized in that: The support assembly includes a cross bar fixedly connected to the first insert, the outer surface of the cross bar is sleeved with a first ring and a second ring, the first ring is located between the second ring and the first insert, the surface of the first ring is rotatably mounted with a first connecting rod rotatably matched with the second insert, and the surface of the second ring is rotatably mounted with a second connecting rod rotatably matched with the third insert.

7. The high wear-resistant mold for plastic processing according to claim 6, characterized in that: The first connecting rod on the first ring and the second connecting rod on the second ring are staggered based on the circumferential direction of the cross bar.

8. The high wear-resistant mold for plastic processing according to claim 6, characterized in that: The control assembly comprises three cylinders fixedly installed in the opening, the output shaft of the first cylinder is fixedly connected to the crossbar, the output shaft of the second cylinder is fixedly connected to the first ring, and the output shaft of the third cylinder is fixedly connected to the second ring.

9. The high wear-resistant mold for plastic processing according to any one of claims 2 to 8, characterized in that: The surface of one of the third inserts is elastically connected to the fourth insert via a first spring, and the surface of the fourth insert is fixedly mounted with a first pull rope fixedly connected to the first insert; when the first insert shrinks into the lower mold, the first pull rope can drive the fourth insert to shrink into the third insert and squeeze the first spring.

10. The high wear-resistant mold for plastic processing according to claim 9, characterized in that: The middle of the first insert is circular and has protrusions formed outwardly on both the upper and lower sides, and the width of the protrusions is equal to and adapted to the width of the second insert.

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