A secondary ejection mechanism for an automatic drawing die

Abstract

The present invention discloses a secondary ejection mechanism of an automatic material drawing die, which has a slider retreat pin, a pin fixing block is arranged on the top of the slider retreat pin, and a built-in slider is arranged on the bottom; a slot is arranged vertically at the center of the back of the built-in slider, and a lower inclined surface is arranged at the top surface located on the left and right sides of the slot, and an upper inclined surface that matches the lower inclined surface is arranged on the bottom surface of the slider retreat pin, and an ejector plate limit block is arranged on the top surface of the built-in slider located on the front of the slider retreat pin; a limit groove with a side "┐"-shaped structure is arranged at the front of the ejector plate limit block near the bottom, and a plug block that can be plugged and matched with the slot is formed on the part of the ejector plate limit block located behind the limit groove. This automatic material drawing die secondary ejection mechanism is convenient for adjusting the ejector height, easy for control and mold assembly and maintenance, stable structure, small ejector ejection stroke, shortened molding cycle, improved production capacity, and can ensure product quality.

Description

Technical Field

[0001] The invention relates to an automatic material pulling die ejection mechanism, in particular to an automatic material pulling die secondary ejection mechanism. Background Art

[0002] The secondary ejection mechanism of the automatic pulling mold is suitable for continuous pulling terminal implantation molds, and is commonly used in 3C electronic connector products. It can meet the requirements of short molding cycle, high production capacity requirements, high stability, and fast and easy maintenance.

[0003] The existing secondary ejection mechanism of the automatic pulling die is generally composed of a template and an ejector plate. The ejector plate has three parts, which can be divided into the first ejector plate, the second ejector plate and the third ejector plate from top to bottom. The template is located above the first ejector plate, an outer spring is arranged between the template and the second ejector plate, and an inner spring is arranged between the first ejector plate and the second ejector plate.

[0004] This automatic pulling die needs to work with the ejector pin. When working, the elastic force of the outer spring and the inner spring needs to be calculated, and the three ejector pin plates need to move upward at the same time. Since the spring compression is relatively large, the ejector pin plate has a large ejection stroke, and it is easy to have abnormalities during ejection, which is costly and inconvenient to repair. In addition, the ejector pin height is not easy to adjust, so the molding time is long and the processing efficiency is low. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an automatic drawing die secondary ejection mechanism which has easy control of ejector synchronization, a small ejection stroke, can shorten the molding cycle and is easy to maintain.

[0006] In order to solve the above technical problems, the present invention is realized through the following technical solutions: an automatic drawing die secondary ejection mechanism, comprising a vertically arranged slider retreat pin, the top of the slider retreat pin is provided with a pin fixing block fixedly connected to the bottom of the template, and the bottom is provided with a built-in slider movably matched with the built-in slider, the built-in slider is slidably matched with the travel slide groove preset at the top of the third ejector plate, and a slot connected up and down is vertically arranged at the back center, the left and right widths of the slot are smaller than the left and right widths of the slider retreat pin, and the left and right widths of the slider retreat pin are less than or equal to the left and right widths of the built-in slider; the top surface of the built-in slider is located on the left and right sides of the slot and is provided with a lower inclined surface inclined downwardly to the back, the bottom surface of the slider retreat pin is provided with an upper inclined surface matched with the lower inclined surface up and down, the top surface of the built-in slider is located at the front end of the lower inclined surface as a horizontal plane, and the horizontal plane is provided with an ejector plate limit block whose back is in contact with the front of the slider retreat pin; the top of the ejector plate limit block passes through the second ejector plate The locking pin is configured to lock the locking cam of the locking cam and the locking cam of the locking cam, wherein the locking cam is configured to lock the locking cam of the locking cam and the locking cam of the locking cam.

[0007] Preferably, a connecting hole communicating with each other up and down is provided on the top surface of the pin fixing block near the back side, the slider retreat pin is plugged into the connecting hole, and the end of the slider retreat pin passes through the connecting hole and extends downwardly below the bottom of the pin fixing block.

[0008] Preferably, a slot integral with the connecting hole is provided at the top of the connecting hole, and the slot and the side of the connecting hole form a "┐"-shaped structure. A block integral with the connecting hole is provided at the front side of the sliding block retraction pin near the top, and the block is engaged with the slot, and the sliding block retraction pin is restricted in the connecting hole by the engaged block and the slot.

[0009] Preferably, a first countersunk hole connected up and down is provided at the bottom of the pin fixing block, and a positioning groove for facilitating the installation of the pin fixing block is provided at the bottom of the template. A second screw hole corresponding to the first countersunk hole up and down is provided in the positioning groove, and the pin fixing block and the template are fixedly connected by T-bolts threadedly engaged in the first countersunk hole and the second screw hole.

[0010] Preferably, a first screw hole connected up and down is provided on the top of the ejector plate limit block, and a second countersunk hole corresponding to the first screw hole up and down is provided on the top of the first ejector plate, and the ejector plate limit block and the first ejector plate are fixedly connected by a T-bolt threadedly engaged in the first ejector plate and the first screw hole.

[0011] Preferably, guide blocks are mirror-imaged on the left and right sides of the bottom of the built-in sliding block, and guide grooves slidably matched with the guide blocks are provided at positions on the left and right sides of the travel sliding groove corresponding to the guide blocks.

[0012] Preferably, a spring limiting hole is provided on the front side of the built-in sliding block, and a return spring is provided in the spring limiting hole, the front end of which contacts with the front end of the travel sliding groove.

[0013] Preferably, a guiding slope inclined toward the center of the bottom is provided on the front side of the slider retreat pin near the bottom.

[0014] Compared with the prior art, the advantages of the present invention are as follows: the secondary ejection mechanism of the automatic material pulling mold is convenient for adjusting the ejector height, the ejector synchronization is easy to control, there is no need to calculate the spring, it is convenient for mold assembly and maintenance, the structure is stable, the ejector moves backward to reduce the ejection height, the ejection stroke is small, the molding cycle is shortened, the production capacity is improved, and at the same time it can prevent the ejector from scratching the product when pulling the material, thereby ensuring the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a schematic diagram of the front three-dimensional structure of a secondary ejection mechanism of an automatic drawing die of the present invention;

[0017] Figure 2 It is a schematic diagram of the back three-dimensional structure of a secondary ejection mechanism of an automatic drawing die of the present invention;

[0018] Figure 3 It is a schematic diagram of a top view of the secondary ejection mechanism of an automatic material drawing die of the present invention;

[0019] Figure 4 yes Figure 3 Structural cross-section view of AA in the middle;

[0020] Figure 5It is a schematic diagram of the assembly structure of the secondary ejection mechanism, ejector plate and mold of an automatic material pulling mold of the present invention;

[0021] Figure 6 yes Figure 5 A magnified view of the structure of B.

[0022] In the figure: 1. Slider retreat pin; 11. Upper inclined surface; 12. Guide inclined surface; 13. Block; 2. Pin fixing block; 21. First countersunk hole; 22. Connecting hole; 23. Slot; 3. Ejector plate limit block; 31. Insert block; 32. First screw hole; 33. Limiting slot; 4. Built-in slider; 41. Lower inclined surface; 42. Guide block; 43. Spring limit hole; 44. Slot; 5. Template; 51. Positioning slot; 52. Second screw hole; 6. First ejector plate; 61. Connecting slot; 62. Second countersunk hole; 63. Upper guide hole; 7. Second ejector plate; 71. Connecting hole; 72. Lower guide hole; 8. Third ejector plate; 81. Travel slide; 82. Guide slot. DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments:

[0024] Figures 1 to 6The automatic drawing die secondary ejection mechanism shown in the figure has a vertically arranged slider retreat pin 1, the top of the slider retreat pin 1 is provided with a pin fixing block 2 fixedly connected to the bottom of the template 5, and the bottom is provided with a built-in slider 4 movably matched with it, the built-in slider 4 is slidably matched with the travel slide groove 81 preset at the top of the third ejector plate 8, and a slot 44 connected up and down is vertically arranged at the center of the back side, the left and right width of the slot 44 is smaller than the left and right width of the slider retreat pin 1, and the left and right width of the slider retreat pin 1 is less than or equal to the built-in slider 4. The left and right widths of the built-in slider 4 are provided with lower inclined surfaces 41 inclined downwardly to the back at the positions on the left and right sides of the slot 44, and the bottom surface of the slider retreat pin 1 is provided with an upper inclined surface 11 matched with the lower inclined surface 41 up and down, and the position of the top surface of the built-in slider 4 located at the front end of the lower inclined surface 41 is a horizontal plane, and the horizontal plane is provided with a pin plate limit block 3 whose back is in contact with the front of the slider retreat pin 1; the top of the pin plate limit block 3 passes through the preset connection hole 71 on the second pin plate 7 and is fixedly connected to the pin plate 6 pre-set on the bottom surface of the first pin plate 6 The connecting groove 61 is provided, and the part of the first ejector plate 6 located at the rear end of the connecting groove 61 is provided with an upper guide hole 63 connected up and down, and the part of the second ejector plate 6 located at the rear end of the connecting hole 71 is provided with a lower guide hole 72 connected up and down, and the upper guide hole 63 and the lower guide hole 72 correspond to each other up and down and are connected to each other, and the slider retreat pin 1 is penetrated in the upper guide hole 63 and the lower guide hole 72 corresponding to each other up and down, and the front part of the ejector plate limit block 3 near the bottom is provided with a limit groove 33 with a "┐"-shaped structure on the side, and the ejector plate limit An insert block 31 is formed on the block 3 at the rear of the limit groove 33 and can be plugged into the slot 44; the slider retreat pin 1 can drive the built-in slider 4 to move toward the front end of the travel slot 81 in the travel slot 81 through the obliquely matched upper inclined surface 11 and lower inclined surface 41, and the insert block 31 located on the front side of the slider retreat pin 1 disengages from the top surface of the built-in slider 4 and falls into the slot 44, and the end of the slider retreat pin 1 falls into the gap formed by the back of the built-in slider 4 and the rear end of the travel slot 81.

[0025] In order to facilitate the matching connection between the pin fixing block 2 and the slider retreat pin 1, a connecting hole 22 connected up and down is provided on the top surface of the pin fixing block 2 near the back side, and the slider retreat pin 1 is plugged into the connecting hole 22, and the end of the slider retreat pin 1 passes through the connecting hole 22 and extends downward below the bottom of the pin fixing block 2.

[0026] In order to facilitate the slider retreat pin 1 to be snapped into the pin fixing block 2 and prevent the slider retreat pin 1 from detaching from the pin fixing block 2, a slot 23 integral with the connecting hole 22 is provided at the top of the connecting hole 22, and the slot 23 and the side of the connecting hole 22 form a "┐"-shaped structure. A block 13 integrally formed with the slider retreat pin 1 is provided near the top of the front side, and the block 13 is snap-fitted with the slot 23. The slider retreat pin 1 is restricted in the connecting hole 22 by the snap-fitting block 13 and the slot 23.

[0027] In order to facilitate the fixed connection of the pin fixing block 2 to the bottom surface of the template 5, a first countersunk hole 21 connected up and down is set at the bottom of the pin fixing block 2, and a positioning groove 51 for facilitating the installation of the pin fixing block 2 is set at the bottom of the template 5. The positioning groove 51 is provided with a second screw hole 52 corresponding to the first countersunk hole 21 up and down. The pin fixing block 2 and the template 5 are fixedly connected by T-bolts threadedly fitted in the first countersunk hole 21 and the second screw hole 52.

[0028] In order to facilitate the fixed connection of the ejector plate limit block 3 to the bottom surface of the first ejector plate 6, a first screw hole 32 connected up and down is provided on the top of the ejector plate limit block 3, and a second countersunk hole 62 corresponding to the first screw hole 32 up and down is provided on the top of the first ejector plate 6. The ejector plate limit block 3 and the first ejector plate 6 are fixedly connected by a T-bolt threadedly engaged with the first ejector plate 6 and the first screw hole 32.

[0029] In order to facilitate the built-in slider 4 to move left and right in the travel slot 81, guide blocks 42 are mirror-imaged on the left and right sides of the bottom of the built-in slider 4, and guide slots 82 that slidably cooperate with the guide blocks 42 are provided at the positions on the left and right sides of the travel slot 81 corresponding to the guide blocks 42.

[0030] In order to facilitate the return of the built-in slider 4 , a spring limiting hole 43 is provided on the front side of the built-in slider 4 , and a return spring whose front end contacts the front end of the travel slide groove 81 is provided in the spring limiting hole 43 .

[0031] In order to facilitate the spacing and plug-in fit between the end of the slider retraction pin 1 and the back of the built-in slider 4 and the rear end of the travel groove 81, a guide slope 12 inclined toward the center of the bottom is provided near the bottom of the slider retraction pin 1.

[0032] The specific usage is as follows: the slider retreat pin 1 is inserted into the connecting hole 22 of the pin fixing block 2, and the bottom of the slider retreat pin 1 extends below the bottom of the pin fixing block 2; the pin fixing block 2 is installed in the positioning groove 51 preset at the bottom of the template 5, and the pin fixing block 2 is fixed in the positioning groove 51 by passing the T-bolt through the first countersunk hole 21 and the second screw hole 52; the ejector plate limit block 3 is installed in the connection hole 71 preset on the second ejector plate 7, and the connection hole 71 is connected from top to bottom. The insert block 31 below the ejector plate limit block 3 is located below the bottom of the second ejector plate 7, and the top protrudes above the top of the second ejector plate 7. The protruding portion corresponds to the connection groove 61 preset at the bottom of the first ejector plate 6 and cooperates with each other. The limit block 3 and the first ejector plate 6 are fixedly connected together by T-bolts passing through the corresponding second countersunk holes 62 and the first screw holes 32. The slider retreat pin 1 is inserted into the upper guide hole 63 and the lower guide hole 72 corresponding to the upper and lower parts. The end of the slider retreat pin 1 passes through the lower guide hole 72 and extends below the bottom of the second ejector plate 7. The built-in slider 4 is arranged in a travel groove 81 preset at the top of the third ejector plate 8. The guide blocks 42 on the left and right sides of the bottom of the built-in slider 4 are slidably matched with the guide groove 82 on the inner side of the travel groove 81. The built-in slider 4 can move left and right in the travel groove 81 through the slidably matched guide blocks 42 and guide groove 82. A return spring is arranged in the spring limit hole 43 on the front side of the built-in slider 4. The first end is connected with the spring limiting hole 43, and the other end is connected with the front end of the travel slide groove 81. The bottom surface of the ejector plate limiting block 3 is in horizontal contact with the top surface of the built-in slider 4, and the upper inclined surface 11 on the bottom surface of the slider retreat pin 1 is in vertical contact with the lower inclined surface 41 on the built-in slider 4; when the ejector rod in the equipment machine pushes the third ejector plate 8, the second ejector plate 7 and the first ejector plate 6 upward, a relative force is formed between the built-in slider 4 and the slider retreat pin 1. Through the relative force of the matching lower inclined surface 41 and upper inclined surface 11, the slider retreat pin 1 can drive the built-in slider 4 to move forward in the travel slide groove 81, and make the plug block 31 located on the front side of the slider retreat pin 1 disengage from the top surface of the driving built-in slider 4 and fall into the In the slot 43, the end of the slider retreat pin 1 falls into the gap formed by the back of the built-in slider 4 and the rear end of the travel slot 81, and the ejector plate limit block 3 and the first ejector plate 6 and the second ejector plate 7 are downward without support, and the bottom surface of the second ejector plate 7 is in contact with the top surface of the third ejector plate 8, thereby shortening the ejector height, saving ejection time, improving efficiency, and avoiding contact and scratching of the product with the ejector when it moves after molding; when the ejector rod retreats, the spring between the template 5 and the first ejector plate 6 and the spring between the second ejector plate 7 and the third ejector plate 8 push the first ejector plate 6, the second ejector plate 7 and the third ejector plate 8 to return upward, and at the same time, the reset spring in the travel slot 81 pushes the built-in slider 4 to return backward, completing the secondary ejection action.

[0033] This automatic secondary ejection mechanism for the pulling mold is convenient for adjusting the ejector height. The ejector synchronization is easy to control, and there is no need to calculate the spring, which is convenient for mold assembly and maintenance. The structure is stable, the ejector moves backward to reduce the ejection height, the ejection stroke is small, the molding cycle is shortened, and the production capacity is increased. At the same time, it can prevent the ejector from scratching the product when pulling the material, thereby ensuring product quality.

[0034] It should be emphasized that the above are only preferred embodiments of the present invention and do not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An automatic drawing die secondary ejection mechanism, characterized in that: A vertically arranged slider retreat pin (1) is provided, the top of the slider retreat pin (1) is provided with a pin fixing block (2) fixedly connected to the bottom of the template (5), the bottom is provided with a built-in slider (4) movably matched with the slider, the built-in slider (4) is slidably matched with a travel slide groove (81) preset at the top of the third ejector plate (8), and a slot (44) connected up and down is vertically provided at the center of the back side, the left and right width of the slot (44) is smaller than the left and right width of the slider retreat pin (1), and the left and right width of the slider retreat pin (1) is smaller than or equal to the left and right width of the built-in slider (4); the built-in slider (4) is at the top The left and right sides of the slot (44) are provided with lower inclined surfaces (41) inclined downwardly from the back side; the bottom surface of the slider retreat pin (1) is provided with an upper inclined surface (11) matched with the lower inclined surface (41) up and down; the top surface of the built-in slider (4) is located at the front end of the lower inclined surface (41) and is a horizontal surface; the horizontal surface is provided with an ejector plate limit block (3) whose back side is in contact with the front side of the slider retreat pin (1); the top of the ejector plate limit block (3) passes through a preset connection hole (71) on the second ejector plate (7) and is fixedly connected to a preset connection groove (61) on the bottom surface of the first ejector plate (6); The first ejector plate (6) is provided with an upper guide hole (63) connected to each other at a position located at the rear end of the connecting groove (61), and the second ejector plate (7) is provided with a lower guide hole (72) connected to each other at a position located at the rear end of the connecting hole (71). The upper guide hole (63) and the lower guide hole (72) correspond to each other and are connected to each other. The slider retreat pin (1) is inserted into the upper guide hole (63) and the lower guide hole (72) corresponding to each other. The ejector plate limit block (3) is provided with a limit groove (33) with a "┐"-shaped structure on the side surface at a position near the bottom of the front surface. The ejector plate limit block (3) is provided with a limit groove (33) at a position near the bottom of the limit groove (63). The portion behind the position slot (33) forms an insert block (31) that can be plugged into the slot (44); the slider retreat pin (1) drives the built-in slider (4) to move toward the front end of the travel slot (81) in the travel slot (81) through the upper inclined surface (11) and the lower inclined surface (41) that are obliquely matched, and the insert block (31) located on the front side of the slider retreat pin (1) is separated from the top surface of the built-in slider (4) and falls into the slot (44), and the rear end of the slider retreat pin (1) falls into the gap formed by the back of the built-in slider (4) and the rear end of the travel slot (81); A connecting hole (22) communicating with each other from top to bottom is provided at a portion of the top surface of the pin fixing block (2) close to the back surface, the slider retreat pin (1) is plugged into and matched with the connecting hole (22), and the end of the slider retreat pin (1) passes through the connecting hole (22) and extends downwardly below the bottom of the pin fixing block (2); A guiding inclined surface (12) inclined towards the center of the bottom is provided on the front side of the slider retreat pin (1) near the bottom.

2. The automatic drawing die secondary ejection mechanism according to claim 1, characterized in that: The top of the connection hole (22) is provided with a slot (23) integral therewith, the slot (23) and the side of the connection hole (22) form a "┐"-shaped structure, the front of the slider retreat pin (1) near the top is provided with a block (13) integrally formed therewith, the block (13) is engaged with the slot (23), and the slider retreat pin (1) is restricted within the connection hole (22) by the engaged block (13) and the slot (23).

3. The automatic drawing die secondary ejection mechanism according to claim 1, characterized in that: The bottom of the pin fixing block (2) is provided with a first countersunk hole (21) communicating with each other from top to bottom, the bottom of the template (5) is provided with a positioning groove (51) for facilitating the installation of the pin fixing block (2), and the positioning groove (51) is provided with a second screw hole (52) corresponding to the first countersunk hole (21) from top to bottom, and the pin fixing block (2) and the template (5) are fixedly connected by T-bolts threadedly engaged in the first countersunk hole (21) and the second screw hole (52).

4. The automatic drawing die secondary ejection mechanism according to claim 1, characterized in that: A first screw hole (32) communicating with each other from top to bottom is provided at the top of the ejector plate limit block (3), and a second countersunk hole (62) corresponding to the first screw hole (32) from top to bottom is provided at the top of the first ejector plate (6). The ejector plate limit block (3) and the first ejector plate (6) are fixedly connected by a T-bolt threadedly engaged in the first ejector plate (6) and the first screw hole (32).

5. The automatic drawing die secondary ejection mechanism according to claim 1, characterized in that: Guide blocks (42) are mirror-imaged on the left and right sides of the bottom of the built-in sliding block (4), and guide grooves (82) that slidably cooperate with the guide blocks (42) are provided at the positions on the left and right sides of the travel sliding groove (81) corresponding to the guide blocks (42).

6. The automatic drawing die secondary ejection mechanism according to claim 1, characterized in that: A spring limiting hole (43) is provided on the front side of the built-in sliding block (4), and a return spring whose front end contacts the front end of the travel sliding groove (81) is provided in the spring limiting hole (43).

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