Die with secondary ejection structure

Abstract

The utility model relates to the technical field of injection molds, and discloses a mold with a secondary ejection structure, the secondary ejection structure comprises a linkage column and a limiting pin, the linkage column is fixedly connected with an ejector plate of the mold, a front push plate of the mold is provided with a linkage hole for the linkage column to penetrate through, and the limiting pin is fixedly connected with the linkage hole. The front push plate is provided with a sliding groove communicated with the linkage hole, the limiting pin is arranged in the sliding groove and provided with a first position and a second position, the limiting pin is provided with a first clamping groove, the linkage column is provided with a second clamping groove, and when the limiting pin is located at the first position, the first clamping groove is connected with the second clamping groove in a clamped mode, and when the limiting pin is located at the second position, the second clamping groove is connected with the linkage column in a clamped mode. The first clamping groove is separated from the second clamping groove; the limiting assembly is suitable for driving the limiting pin to move between the first position and the second position along with the movement of the front push plate, and the problems that an ejector pin and the push plate need to be driven by different pushing structures, and consequently a mold is complex in structure, large in weight, large in size and the like are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a mold with a secondary ejection structure. Background Art

[0002] Injection molding refers to a method of mixing molten plastic materials with a screw at a certain temperature, injecting them into the mold cavity at high pressure, and obtaining molded products after cooling and solidification. During the injection molding process, some parts have recessed structures such as deep grooves. After the injection molding is completed, they will be wrapped on the mold cavity structure and generate a large clamping force. If the product is ejected from the mold cavity in one go during the demolding process, it is easy to cause whitening defects. Therefore, a secondary ejection structure is required for two ejections.

[0003] In the related technology, the first ejection of the product is generally performed by pushing the push plate forward to separate the product from the rear mold insert, reducing the fitting area between the product and the mold cavity, and then pushing the ejector forward to completely separate the product from the mold core.

[0004] However, since the ejector pin and the push plate do not move synchronously during the secondary ejection process, different pushing structures need to be provided for the ejector pin and the push plate, resulting in a complex and bulky structure and a heavy mold, which is not conducive to installation and maintenance. Utility Model Content

[0005] In view of this, the utility model provides a mold with a secondary ejection structure to solve the problem that the ejector pin and the push plate need to be driven by different push structures, resulting in the inconvenience of complex mold structure, heavy weight, large volume, etc.

[0006] In the first aspect, the utility model provides a secondary ejection structure, including: a mold base; a rear mold base, fixedly connected to the mold base; a front push plate, opposite to the rear mold base and located on one side of the rear mold base; an ejector plate, located on a side of the rear mold base away from the front push plate, moving in a direction close to or away from the rear mold base, and an ejector pin is fixedly installed on the ejector plate; a linkage assembly, including a linkage column and a limit pin, the linkage column is fixedly connected to the ejector plate, the limit pin is slidably arranged in the front push plate and has a first position and a second position, when the limit pin is in the first position, the limit pin locks the linkage column and the front push plate and moves synchronously, when the limit pin is in the second position, the linkage column and the front push plate are unlocked; a limit assembly, suitable for driving the limit pin to move between the first position and the second position as the front push plate moves.

[0007] Beneficial effect: by setting the linkage column, in the first ejection stage of the mold, under the action of the limit assembly, the limit pin is located at the first position, when the ejector plate is pushed forward by the driving mechanism, the ejector and the linkage column move forward synchronously with the ejector plate, and the linkage column drives the front push plate of the mold to move synchronously. Since the rear mold insert remains stationary at this time, the front push plate drives the rear mold core forward when moving forward to separate the injection molded product from the rear mold insert; in the secondary ejection stage, the ejector plate continues to eject forward, and the limit assembly drives the limit pin to move to the second position, unlocking the linkage column and the front push plate, and the linkage column can no longer drive the front push plate to move forward. At this time, the ejector continues to move forward with the ejector plate, thereby protruding from the front side of the front push plate, pushing the injection molded product away from the rear mold core, and completing the secondary ejection. Through the above structure, the front push plate and the ejector plate move synchronously during the first ejection, and the front push plate is automatically separated from the linkage column during the second ejection, so that the ejector can be ejected twice alone, so there is no need to set up a separate push structure for the movement of the ejector, which simplifies the structure, reduces the volume and weight of the structure, and is also convenient for installation and maintenance.

[0008] In an optional embodiment, the front push plate has a linkage hole for the linkage column to pass through, and the front push plate has a sliding groove connected to the linkage hole, the limit pin is slidably set in the sliding groove, the limit pin has a first card slot, and the peripheral side wall of the linkage column has a second card slot, when the limit pin is in the first position, the first card slot is engaged with the second card slot, and when the limit pin is in the second position, the first card slot is separated from the second card slot.

[0009] Beneficial effect: by setting a first slot on the limit pin and setting a second slot on the linkage column that is adapted to the first slot, when the limit pin moves to the first position, the first slot is engaged with the second slot, thereby locking the linkage column and the limit pin, thereby realizing the synchronous movement of the ejector plate and the front push plate.

[0010] In an optional embodiment, the limit assembly includes an elastic member and a limit block, the sliding groove extends to the side wall of the front push plate, the elastic member is located in the sliding groove and is suitable for squeezing the limit pin out of the notch of the sliding groove, the limit block is fixedly connected to the mold base of the mold and is opposite to the notch, and the limit block has a limit groove extending along the movement direction of the front push plate on the side facing the notch, and the side groove wall of the limit groove has a guide surface suitable for pressing the limit pin into the sliding groove, when one end of the limit pin extends into the limit groove, the limit pin is in the first position, and when the guide surface presses the limit pin into the sliding groove, the limit pin is in the second position.

[0011] Beneficial effect: in the stage of primary ejection of the mold, since the guide surface does not squeeze the limit pin, the limit pin is maintained in the first position under the action of the elastic member to lock the linkage column and the front push plate, so that the front push plate and the ejector plate move synchronously. At this time, the end of the limit pin extends from the sliding groove and is located in the limit groove; in the stage of secondary ejection of the mold, as the ejector plate continues to move, the guide surface on the limit block gradually squeezes the limit groove and finally presses the limit pin into the sliding groove, so that the limit pin reaches the second position, thereby completing the unlocking of the linkage column and the front push plate.

[0012] In an optional embodiment, a limiting plane is provided on the circumferential side of the linkage column, the second slot is opened on the limiting plane, and when the limiting pin is located at the first position, the bottom of the first slot abuts against the limiting plane.

[0013] Beneficial effects: By setting the limiting plane, the contact area between the bottom of the first slot on the limiting pin and the linkage column is increased, thereby reducing the pressure and the wear generated during relative movement. Moreover, compared with the fitted curved surface, the fitted plane is easier to process, thereby reducing the processing difficulty and reducing the processing cost. At the same time, due to the setting of the limiting plane, the required groove depth of the second slot is reduced. Compared with the case where the limiting plane is not set, the movement distance of the limiting pin from the first position to the second position is reduced, thereby reducing the impact force, and making the movement time shorter and the structural response faster.

[0014] In an optional implementation, the linkage column passes through the limiting pin from the inner side of the first slot.

[0015] Beneficial effect: By allowing the linkage column to pass through the limit pin from the first slot, the linkage column and the limit pin are mutually limited, reducing the possibility of structural failure caused by the offset position of the limit pin and the linkage column during the working process of the structure, thereby improving the structural reliability.

[0016] In an optional embodiment, the linkage hole passes through the front push plate, and when the limit pin is located at the first position, the end of the linkage column away from the ejector plate is flush with the plate surface of the front push plate away from the ejector plate.

[0017] Beneficial effect: Since the linkage column is fixedly connected to the ejector plate, by making the linkage hole pass through the front push plate and be flush with the front push plate at the front end of the secondary ejection, the linkage column and the ejector are extended synchronously during the secondary ejection of the mold. Therefore, when the product is separated and the mold is closed again, the front mold part of the mold can push the linkage column to reset the ejector plate and press the linkage column back to the inside of the front push plate, which plays the role of mold return needle, thereby eliminating the need for an additional return needle structure for the mold, further reducing the volume of the mold and simplifying the mold structure.

[0018] In an optional embodiment, it also includes a rear mold insert and a rear mold core, the rear mold insert is fixedly connected to the rear mold plate; the rear mold core is surrounded by the circumference of the rear mold insert and is embedded and fixed in the front push plate, and the rear mold insert and the rear mold plate both have through holes for the ejector pin to pass through.

[0019] Beneficial effect: Through the cooperation of the linkage column and the limit assembly, the front push plate and the ejector plate only keep synchronous movement during the first ejection of the mold. The front push plate drives the rear mold core to move, so that the rear mold insert is separated from the product. Then, during the second ejection process, the front push plate stops moving, and the ejector moves forward with the ejector plate, thereby ejecting the product from the rear mold core and completing the separation. The same driving structure realizes the pushing work of the two ejections, simplifies the overall structure of the mold, and is conducive to reducing the volume of the mold, improving the utilization rate of the internal space of the mold, and facilitating the lightweight of the mold, thereby reducing the difficulty of installation and maintenance.

[0020] In an optional embodiment, a limiting bolt is threadedly connected to one side of the front push plate facing the rear template, and the rear template has a limiting hole suitable for the limiting bolt rod to pass through and preventing the limiting bolt end from passing through.

[0021] Beneficial effect: By setting a limit bolt and setting a limit hole on the rear template for only the limit bolt stem to pass through, after the mold completes the first ejection action, the position of the front push plate is limited by the rear template connected to the mold base and the limit bolt, preventing the front push plate from continuing to move forward with the ejector pin or linkage column due to the friction of the structure, thereby improving the structural reliability.

[0022] In an optional embodiment, the ejector plate includes a front ejector plate and a rear ejector plate, the ejector and the end of the linkage column connected to the ejector plate are both provided with a fixing block, the front ejector plate has a first mounting hole adapted to the linkage column and a second mounting hole adapted to the ejector, the front ejector plate has a receiving groove adapted to the fixing block at the first mounting hole and the second mounting hole on one side of the front ejector plate facing the rear ejector plate, and the front ejector plate is connected to the rear ejector plate by fasteners.

[0023] Beneficial effect: by setting the first mounting hole and the second mounting hole and the accommodating groove on the front top plate, during the mold assembly process, the linkage column and the ejector pin are inserted from the side of the front top plate away from the rear top plate, and after the fixing blocks are respectively located in the corresponding accommodating grooves, the fixing blocks are locked into the accommodating grooves through the rear top plate, thereby realizing the installation of the linkage column and the ejector pin, and the installation structure is simple and easy to operate.

[0024] In an optional embodiment, the fastener is a screw, the rear top plate has a penetrating screw hole, and the screw passes through the screw hole and is threadedly connected to the front top plate.

[0025] Beneficial effect: The screws are inserted from the rear top plate toward the front top plate and fixed, so that the installation direction of the screws is consistent with the installation direction of the linkage column and the ejector pin. During the mold assembly process, the staff can assemble each structure in turn in one direction, which is simple and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic cross-sectional structure diagram of a secondary ejection structure of an embodiment of the utility model when it is installed in a mold;

[0028] Figure 2 The figure is a schematic diagram of the explosion structure of a secondary ejection structure according to an embodiment of the utility model.

[0029] Description of reference numerals:

[0030] 100, linkage assembly; 101, linkage column; 1011, second card slot; 1012, limiting plane; 1013, return needle medium; 102, limiting pin; 1021, first card slot; 200, front push plate; 201, linkage hole; 202, sliding slot; 300, ejector plate; 301, front top plate; 3011, first mounting hole; 3012, second mounting hole; 3013, accommodating slot; 302, rear top plate; 303, ejector; 400, limiting assembly; 401, elastic member; 402, limiting block; 4021, limiting slot; 4022, guide surface; 500, rear template; 501, limiting bolt; 502, limiting hole; 600, rear mold insert; 700, rear mold core; 800, fixing block; 900, compression spring. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0032] Combine the following Figure 1 to Figure 2 , describing an embodiment of the utility model.

[0033] According to an embodiment of the present invention, on the one hand, a secondary ejection structure is provided, see Figure 1 and Figure 2 , including: a mold base, a rear mold plate 500, a front push plate 200, a linkage assembly 100 and a limit assembly 400, the rear mold plate 500 is fixedly connected to the mold base; the front push plate 200 is opposite to the rear mold plate 500 and is located on one side of the rear mold plate 500; the ejector plate 300 is located on the side of the rear mold plate 500 away from the front push plate 200, and moves in the direction of approaching or away from the rear mold plate 500, and an ejector 303 is fixedly installed on the ejector plate 300; the linkage assembly 100 includes a linkage column 101 and a limit pin 102, the linkage column 101 is fixedly connected to the ejector plate 300, and the limit pin 102 is slidably set in the front push plate 200 and has a first position and a second position. When the limit pin 102 is in the first position, the limit pin 102 locks the linkage column 101 and the front push plate 200 and moves synchronously. When the limit pin 102 is in the second position, the linkage column 101 and the front push plate 200 are unlocked; the limit assembly 400 is suitable for driving the limit pin 102 to move between the first position and the second position as the front push plate 200 moves.

[0034] Specifically, the linkage assembly 100 is provided with multiple groups, which are respectively located at the four corners of the front template, so as to evenly push the front push plate 200. The linkage column 101 can be cylindrical, and in some embodiments not shown, the linkage column 101 can also be prismatic, and the shape of the linkage hole 201 is adapted to the linkage column 101 and extends along the movement direction of the ejector plate 300.

[0035] It should be noted that the linkage hole 201 can be a through hole extending to the side of the front push plate 200 away from the rear template 500. In some embodiments not shown, the linkage hole 201 can also be a blind hole. When the linkage hole 201 is a blind hole, a certain amount of space is left between the end of the linkage hole 201 away from the rear template 500 and the end of the linkage column 101, so that the linkage column 101 can continue to move forward after being unlocked from the front push plate 200 during the second ejection.

[0036] In this embodiment, by setting the linkage column 101, in the first ejection stage of the mold, under the action of the limit assembly 400, the limit pin 102 is located in the first position, and when the ejector plate 300 is pushed forward by the driving mechanism, the ejector 303 and the linkage column 101 move forward synchronously with the ejector plate 300, and the linkage column 101 drives the front push plate 200 of the mold to move synchronously. Since the rear mold insert 600 remains stationary at this time, the front push plate 200 drives the rear mold core 700 forward when moving forward. The molded product is separated from the rear mold insert 600; in the secondary ejection stage, the ejector plate 300 continues to eject forward, at which time the limit assembly 400 drives the limit pin 102 to move to the second position, so that the linkage column 101 and the front push plate 200 are unlocked, and the linkage column 101 can no longer drive the front push plate 200 to move forward. At this time, the ejector 303 continues to move forward with the ejector plate 300, thereby protruding from the front side of the front push plate 200, pushing the molded product away from the rear mold core 700, and completing the secondary ejection. Through the above structure, the front push plate 200 and the ejector plate 300 move synchronously during the first ejection, and automatically separate the front push plate 200 from the linkage column 101 during the second ejection, so as to realize the secondary ejection of the ejector 303 alone, so that there is no need to set up a separate driving structure for the movement of the ejector 303, which simplifies the structure, reduces the volume and weight of the structure, and is also convenient for installation and maintenance.

[0037] In one embodiment, the front push plate 200 has a linkage hole 201 for the linkage column 101 to pass through, and the front push plate 200 has a sliding groove 202 connected to the linkage hole 201, the limit pin 102 is slidably set in the sliding groove 202, the limit pin 102 has a first card slot 1021, and the side wall of the linkage column 101 has a second card slot 1011. When the limit pin 102 is in the first position, the first card slot 1021 is engaged with the second card slot 1011, and when the limit pin 102 is in the second position, the first card slot 1021 is separated from the second card slot 1011.

[0038] Specifically, the extension direction of the sliding slot 202 is perpendicular to the extension direction of the linkage hole 201, so that the movement direction of the limit pin 102 is perpendicular to the movement direction of the linkage column 101. When the limit pin 102 is located at the second position, the first clamping slot 1021 and the second clamping slot 1011 are in a separated state, and the limit pin 102 and the linkage column 101 are in a separated state, and the two do not interfere with each other, and when the limit pin 102 is located at the first position, the first clamping slot 1021 and the second clamping slot 1011 are engaged, at this time, the limit pin 102 is partially inserted into the second clamping slot 1011, thereby limiting the movement of the linkage column 101, so that the linkage column 101 is locked with the front push plate 200. In addition, in some embodiments not shown, the extension direction of the sliding groove 202 and the extension direction of the linkage hole 201 can also be obliquely intersecting. When the first slot 1021 is engaged with the second slot 1011, the limit pin 102 can prevent the linkage column 101 from moving along the linkage hole 201, thereby achieving the locking of the linkage column 101 and the front push plate 200. The above-mentioned setting methods of the sliding groove 202 are all within the protection scope of this embodiment.

[0039] In this example, by setting a first slot 1021 on the limit pin 102 and setting a second slot 1011 that is adapted to the first slot 1021 on the linkage column, when the limit pin 102 moves to the first position, the first slot is engaged with the second slot, thereby locking the linkage column 101 and the limit pin 102, thereby realizing the synchronous movement of the ejector plate 300 and the front push plate 200.

[0040] The specific structure of the limiting assembly 400 will be described below in combination with the first position and the second position of the limiting pin 102 .

[0041] In one embodiment, the limit assembly 400 includes an elastic member 401 and a limit block 402. The sliding groove 202 extends to the side wall of the front push plate 200. The elastic member 401 is located in the sliding groove 202 and is suitable for squeezing the limit pin 102 outside the slot of the sliding groove 202. The limit block 402 is fixedly connected to the mold base of the mold and is opposite to the slot. The side of the limit block 402 facing the slot has a limit groove 4021 extending along the movement direction of the front push plate 200. The side groove wall of the limit groove 4021 has a guide surface 4022 suitable for pressing the limit pin 102 into the sliding groove 202. When one end of the limit pin 102 extends into the limit groove 4021, the limit pin 102 is in the first position. When the guide surface 4022 presses the limit pin 102 into the sliding groove 202, the limit pin 102 is in the second position.

[0042] In this embodiment, during the first ejection stage of the mold, since the guide surface 4022 does not squeeze the limit pin 102, the limit pin 102 is maintained in the first position under the action of the elastic member 401 to lock the linkage column 101 and the front push plate 200, so that the front push plate 200 and the ejector plate 300 move synchronously. At this time, the end of the limit pin 102 extends out of the sliding groove 202 and is located in the limit groove 4021; during the second ejection stage of the mold, as the ejector plate 300 continues to move, the guide surface 4022 on the limit block 402 gradually squeezes the limit groove 4021 and finally presses the limit pin 102 into the sliding groove 202, so that the limit pin 102 reaches the second position, thereby completing the unlocking of the linkage column 101 and the front push plate 200.

[0043] In one embodiment, a limiting plane 1012 is provided on the circumferential side of the linkage column 101 , and the second slot 1011 is opened on the limiting plane 1012 . When the limiting pin 102 is located at the first position, the bottom of the first slot 1021 abuts against the limiting plane 1012 .

[0044] In this embodiment, by setting the limiting plane 1012, the contact area between the bottom of the first slot 1021 on the limiting pin 102 and the linkage column 101 is increased, thereby reducing the pressure and the wear generated during relative movement. In addition, compared with the fitted curved surface, the fitted plane is easier to process, thereby reducing the processing difficulty and reducing the processing cost. At the same time, due to the setting of the limiting plane 1012, the required slot depth of the second slot 1011 is reduced. Compared with the case where the limiting plane 1012 is not set, the movement distance of the limiting pin 102 in the process of moving from the first position to the second position is reduced, thereby reducing the impact force, and making the movement time shorter and the structural response faster.

[0045] In one embodiment, the linkage column 101 passes through the limiting pin 102 from the inner side of the first slot 1021 .

[0046] Specifically, the first slot 1021 is formed inside the limiting pin 102 and is a through slot with a continuous circumferential slot wall. The linkage column 101 passes through the first slot 1021 , so that the limiting pin 102 is disposed around the circumference of the linkage column 101 .

[0047] In this embodiment, by allowing the linkage column 101 to pass through the limit pin 102 from the first slot 1021, the linkage column 101 and the limit pin 102 are mutually limited, thereby reducing the possibility of structural failure caused by the offset position of the limit pin 102 and the linkage column 101 during the operation of the structure, thereby improving the structural reliability.

[0048] In one embodiment, the linkage hole 201 passes through the front push plate 200 , and when the limit pin 102 is at the first position, the end of the linkage column 101 away from the ejector plate 300 is flush with the plate surface of the front push plate 200 away from the ejector plate 300 .

[0049] In this embodiment, since the linkage column 101 is fixedly connected to the ejector plate 300, by making the linkage hole 201 pass through the front push plate 200 and be flush with the front push plate 200 at the front end of the secondary ejection, during the process of the mold completing the secondary ejection, the linkage column 101 and the ejector 303 are extended synchronously, so that when the product is separated and the mold is closed again, the front mold part of the mold can push the linkage column 101 to reset the ejector plate 300, and press the linkage column 101 back to the inside of the front push plate 200, which plays the role of the mold return needle, thereby eliminating the need for an additional return needle structure for the mold, further reducing the volume of the mold and simplifying the mold structure.

[0050] Specifically, the linkage column 101 serves as the return pin of the mold, and the end thereof away from the ejector plate 300 is provided with a return pin medium 1013 which plays a buffering role. The return pin medium 1013 can be made of a rubber material, a resin material, or a wooden material as required.

[0051] In one embodiment, it includes: also including a rear mold insert 600 and a rear mold core 700, the rear mold insert 600 is fixedly connected to the rear mold plate 500; the rear mold core 700 is surrounded by the peripheral side of the rear mold insert 600 and is embedded and fixed in the front push plate 200, and both the rear mold insert 600 and the rear mold plate 500 have through holes for the ejector pin 303 to pass through.

[0052] In this embodiment, through the cooperation of the linkage column and the limit assembly, the front push plate and the ejector plate only keep synchronous movement during the first ejection of the mold, and the front push plate drives the rear mold core to move, so that the rear mold insert is separated from the product. Then, during the second ejection process, the front push plate stops moving, and the ejector moves forward with the ejector plate, so that the product is ejected from the rear mold core to complete the separation. The same driving structure realizes the pushing work of the two ejections, simplifies the overall structure of the mold, and is conducive to reducing the volume of the mold, improving the utilization rate of the internal space of the mold, and facilitating the lightweight of the mold, thereby reducing the difficulty of installation and maintenance.

[0053] In one embodiment, a limiting bolt 501 is threadedly connected to one side of the front push plate 200 facing the rear template 500, and the rear template 500 has a limiting hole 502 suitable for the rod of the limiting bolt 501 to pass through and preventing the end of the limiting bolt 501 from passing through.

[0054] In this embodiment, a limiting bolt 501 is provided and a limiting hole 502 is provided on the rear template 500 for only the stem of the limiting bolt 501 to pass through. After the mold completes the first ejection action, the position of the front push plate 200 is limited by the rear template 500 connected to the mold base and the limiting bolt 501, thereby preventing the front push plate 200 from continuing to move forward with the ejector pin 303 or the linkage column 101 due to the friction of the structure, thereby improving the structural reliability.

[0055] In one embodiment, the ejector plate 300 includes a front ejector plate 301 and a rear ejector plate 302, and the ejector 303 and the end of the linkage column 101 connected to the ejector plate 300 are both provided with a fixing block 800, the front ejector plate 301 has a first mounting hole 3011 adapted to the linkage column 101 and a second mounting hole 3012 adapted to the ejector 303, and the front ejector plate 301 has a receiving groove 3013 adapted to the fixing block 800 at the first mounting hole 3011 and the second mounting hole 3012 on the side of the front ejector plate 301 facing the rear ejector plate 302, and the front ejector plate 301 is connected to the rear ejector plate 302 by fasteners.

[0056] In this embodiment, by setting the first mounting hole 3011 and the second mounting hole 3012 and the receiving groove 3013 on the front top plate 301, during the mold assembly process, the linkage column 101 and the ejector pin 303 are inserted from the side of the front top plate 301 away from the rear top plate 302, so that the fixing blocks 800 are respectively located in the corresponding receiving grooves 3013 and then locked into the receiving grooves 3013 through the rear top plate 302, thereby realizing the installation of the linkage column 101 and the ejector pin 303, and the installation structure is simple and easy to operate.

[0057] In one embodiment, the fastener is a screw, and the rear top plate 302 has a penetrating screw hole. The screw passes through the screw hole and is threadedly connected to the front top plate 301 .

[0058] In addition, specifically, a compression spring 900 is provided between the front push plate 200 and the ejector plate 300. The compression spring 900 passes through the rear template 500 and is sleeved on the linkage column 101. The compression spring 900 is provided to assist the ejector plate 300 in resetting, thereby reducing the thrust that the return needle structure needs to apply to the ejector plate when the ejector plate 300 is reset. In addition, the compression spring 900 has a buffering effect and can protect the moving structure of the mold.

[0059] In this embodiment, screws are inserted from the rear top plate 302 toward the front top plate 301 and fixed, so that the installation direction of the screws is consistent with the installation direction of the linkage column 101 and the ejector pin 303. During the mold assembly process, the staff can assemble each structure in turn along one direction, and the operation is simple and efficient.

[0060] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A mold with a secondary ejection structure, characterized in that: include: Die base; A rear mold plate (500) fixedly connected to the mold base; A front push plate (200), opposite to the rear template (500) and located on one side of the rear template (500); An ejector plate (300) is located on a side of the rear template (500) away from the front push plate (200) and moves in a direction approaching or away from the rear template (500). An ejector (303) is fixedly mounted on the ejector plate (300); A linkage assembly (100) comprises a linkage column (101) and a limit pin (102), wherein the linkage column (101) is fixedly connected to the ejector plate (300), and the limit pin (102) is slidably arranged in the front push plate (200) and has a first position and a second position. When the limit pin (102) is located at the first position, the limit pin (102) causes the linkage column (101) and the front push plate (200) to be locked and move synchronously, and when the limit pin (102) is located at the second position, the linkage column (101) and the front push plate (200) are unlocked; The limiting assembly (400) is adapted to drive the limiting pin (102) to move between the first position and the second position as the front push plate (200) moves.

2. The mold with a secondary ejection structure according to claim 1, characterized in that: The front push plate (200) has a linkage hole (201) for the linkage column (101) to pass through, and the front push plate (200) has a sliding groove (202) connected to the linkage hole (201), the limit pin (102) is slidably arranged in the sliding groove (202), the limit pin (102) has a first card slot (1021), and the side wall of the linkage column (101) has a second card slot (1011), when the limit pin (102) is located at the first position, the first card slot (1021) is engaged with the second card slot (1011), and when the limit pin (102) is located at the second position, the first card slot (1021) is separated from the second card slot (1011).

3. The mold with a secondary ejection structure according to claim 2, characterized in that: The limiting assembly (400) comprises an elastic member (401) and a limiting block (402); the sliding groove (202) extends to the side wall of the front push plate (200); the elastic member (401) is located in the sliding groove (202) and is suitable for squeezing the limiting pin (102) out of the notch of the sliding groove (202); the limiting block (402) is fixedly connected to the mold base of the mold and is opposite to the notch; the side of the limiting block (402) facing the notch has a movement direction along the front push plate (200) A limit groove (4021) extends in a direction thereof, and a guide surface (4022) is provided on a side groove wall of the limit groove (4021) for pressing the limit pin (102) into the sliding groove (202). When one end of the limit pin (102) extends into the limit groove (4021), the limit pin (102) is in the first position; when the guide surface (4022) presses the limit pin (102) into the sliding groove (202), the limit pin (102) is in the second position.

4. The mold with a secondary ejection structure according to claim 3, characterized in that: A limiting plane (1012) is provided on the circumferential side of the linkage column (101), and the second clamping groove (1011) is opened on the limiting plane (1012). When the limiting pin (102) is located at the first position, the bottom of the first clamping groove (1021) abuts against the limiting plane (1012).

5. The mold with a secondary ejection structure according to claim 3, characterized in that: The linkage column (101) passes through the limiting pin (102) from the inner side of the first clamping slot (1021).

6. The mold with a secondary ejection structure according to any one of claims 2 to 5, characterized in that: The linkage hole (201) passes through the front push plate (200), and when the limit pin (102) is located at the first position, the end of the linkage column (101) away from the ejector plate (300) is flush with the plate surface of the front push plate (200) away from the ejector plate (300).

7. The mold with a secondary ejection structure according to claim 6, characterized in that: It also includes a rear mold insert (600) and a rear mold core (700), wherein the rear mold insert (600) is fixedly connected to the rear mold plate (500); the rear mold core (700) is arranged around the circumference of the rear mold insert (600) and is embedded and fixed in the front push plate (200), and both the rear mold insert (600) and the rear mold plate (500) have through holes for the ejector pin (303) to pass through.

8. The mold with a secondary ejection structure according to claim 7, characterized in that: The front push plate (200) is threadedly connected to a limiting bolt (501) on one side facing the rear template (500), and the rear template (500) has a limiting hole (502) suitable for the rod of the limiting bolt (501) to pass through and preventing the end of the limiting bolt (501) from passing through.

9. The mold with a secondary ejection structure according to claim 8, characterized in that: The ejector plate (300) comprises a front ejector plate (301) and a rear ejector plate (302); the ejector pin (303) and one end of the linkage column (101) connected to the ejector plate (300) are both provided with a fixing block (800); the front ejector plate (301) has a first mounting hole (3011) adapted to the linkage column (101) and a second mounting hole (3012) adapted to the ejector pin (303); a side of the front ejector plate (301) facing the rear ejector plate (302) has a receiving groove (3013) adapted to the fixing block (800) at the first mounting hole (3011) and the second mounting hole (3012); the front ejector plate (301) and the rear ejector plate (302) are connected via fasteners.

10. The mold with a secondary ejection structure according to claim 9, characterized in that: The fastener is a screw, the rear top plate (302) has a through screw hole, and the screw passes through the screw hole and is threadedly connected to the front top plate (301).

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