Ejecting mechanism of stamping die

Abstract

The utility model relates to the technical field of stamping dies, and discloses a material ejecting mechanism of a stamping die, which comprises an upper die plate and a lower die plate, an upper die core is fixed on the upper die plate, a convex die is arranged in the upper die core, a lower die core is fixed on the lower die plate, the upper die core comprises an upper die seat and an upper die block which are arranged in a split manner, and the upper die seat is provided with a convex die. The male die is inserted into the upper model block, and the lower end of the male die extends to the lower end of the upper model block; the upper model block abuts against the elastic piece, and the elastic piece is arranged in the upper model base. The upper die core is divided into the upper die block and the upper die base in a split mode, and the upper die block can move on the male die under the action of the elastic piece, so that smooth discharging work of workpieces is guaranteed, and the stamping efficiency of products is improved.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, and in particular to an ejector mechanism for a stamping die. Background Technology

[0002] The ejector mechanism of a stamping die is a mechanism that ejects the stamped workpiece from the die. Existing stamping die ejector mechanisms are shown in the attached manual. Figure 5 As shown, the die includes an upper die plate, a lower die plate, an upper die core fixed on the upper die plate, and a lower die core fixed on the lower die plate. A punch is located in the center of the upper die core, and an ejector pin and a nitrogen cylinder are located in the center of the punch. A cavity is located in the center of the lower die core. The workpiece is formed 90° between the upper die core, the lower die core, and the punch. However, during demolding, i.e., as the upper die moves away from the lower die, the pressure of the nitrogen cylinder inside the punch is limited due to the workpiece tightly wrapped around the punch and the size of the punch. This prevents the workpiece from being easily demolded from the punch, requiring workers to gently tap or hammer it to remove the workpiece, thus reducing the stamping efficiency. Utility Model Content

[0003] The purpose of this invention is to provide an ejector mechanism for a stamping die. By separating the upper die core into an upper die block and an upper die seat, and allowing the upper die block to move on the punch under the action of an elastic element, the smooth ejection of the workpiece is ensured, thereby improving the stamping efficiency of the product.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] An ejector mechanism for a stamping die includes an upper template and a lower template. An upper die core is fixed on the upper template, and a punch is provided inside the upper die core. A lower die core is fixed on the lower template. The upper die core includes a separately configured upper die seat and an upper die block. The punch is inserted into the upper die block and its lower end extends to the lower end of the upper die block.

[0006] The upper model block rests against the elastic element, which is located inside the upper model seat.

[0007] During molding, the upper mold plate moves downwards towards the lower mold plate. Through the cooperation of the upper and lower mold cores, the workpiece is molded between the upper and lower mold cores. After molding, the upper mold plate moves the upper mold core upwards. The upper mold core moves the workpiece upwards a certain distance, and then the force exerted by the elastic component on the upper mold block is greater than the force required for the workpiece to detach from the punch. As a result, the upper mold block moves downwards relative to the punch, pushing the workpiece against the punch, thus completing the demolding process. At the same time, the contact area between the upper mold block and the workpiece is large, resulting in more uniform stress on the workpiece and preventing localized deformation caused by the pushing force.

[0008] The present invention is further configured such that the elastic element is a nitrogen cylinder A.

[0009] The elastic element is provided in multiple ways, and the multiple elastic elements are evenly distributed around the circumference, which can make the upper mold block bear force evenly. The multiple elastic elements have greater elasticity, ensuring the smooth demolding of the workpiece.

[0010] The present invention is further configured such that: the lower mold core includes a lower mold block, a lower mold base, and an inner mold column; the lower mold block is fixed to the lower mold base by screws; the lower mold base is fixed to the lower template; and the inner mold column is inserted into the middle of the lower mold block and the lower mold base.

[0011] The inner mold column has a cavity formed on it that corresponds to the punch.

[0012] With the above technical solution, the components of the upper mold core and the lower mold core are set separately, so that when one or more of the lower mold block, upper mold block, punch and inner mold pillar need to be maintained or replaced, maintenance and replacement can be carried out at a low cost.

[0013] The present invention is further configured such that: the upper model base is formed with a stepped through hole A with a larger upper part and a smaller lower part, and the upper model block is formed with a threaded hole;

[0014] A lower limiting rod is fitted inside the stepped through hole A. The lower limiting rod extends through the stepped through hole A and is screwed onto a threaded hole. A limiting boss is formed at the upper end of the lower limiting rod. When the upper model block moves away from the upper model seat due to the elastic force of the elastic element, the upper model block moves together with the lower limiting rod. When the limiting boss of the lower limiting rod contacts the stepped surface of the stepped through hole A, it can no longer move, thus limiting the movement range of the lower model block.

[0015] The present invention is further configured such that: an eccentric hole is formed on the limiting boss, a limiting rod is sleeved inside the eccentric hole, the limiting rod is fixed to the bottom of the limiting block, and the limiting block is inserted into the upper end of the stepped through hole A.

[0016] The above technical solution prevents the limiting boss from rotating by the limiting rod set eccentrically, thereby preventing the lower limiting rod from rotating freely and becoming loose.

[0017] The limiting block has a pull-out through hole formed in the middle, which facilitates the removal of the limiting block and makes it easier to adjust and replace the upper model block.

[0018] The present invention is further configured such that: a stepped through hole B with a larger upper part and a smaller lower part is formed inside the punch; a stepped push rod is sleeved inside the stepped through hole B; the upper end of the stepped push rod abuts against the nitrogen cylinder B; and the nitrogen cylinder B is fixed inside the punch.

[0019] By adding a nitrogen cylinder and a stepped ejector pin inside the punch, the ejection force can be further increased, thereby ensuring smooth demolding of the workpiece.

[0020] The outstanding effect of this utility model is:

[0021] Compared with existing technologies, by separating the upper die core into an upper die block and an upper die seat, and allowing the upper die block to move on the punch under the action of an elastic element, the smooth ejection of the workpiece is ensured, and the stamping efficiency of the product is improved.

[0022] The upper and lower mold cores are designed as separate parts, which facilitates subsequent replacement and maintenance.

[0023] By using the upper model block to support the workpiece and push it away from the punch, workpiece deformation caused by single-point pushing can be prevented. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 for Figure 1 A sectional view of AA;

[0026] Figure 3 for Figure 1 A view about B;

[0027] Figure 4 for Figure 2 A magnified view of a portion of C;

[0028] Figure 5 This is a schematic diagram of the structure of a prior art top-loading mechanism;

[0029] Figure 6 This is a schematic diagram of the workpiece involved in this utility model.

[0030] Attached reference numerals: 10. Upper mold plate; 11. Upper mold core; 12. Punch; 13. Elastic element; 14. Stepped ejector pin; 15. Nitrogen cylinder B;

[0031] 111. Upper model base; 112. Upper model block; 113. Stepped through hole A; 114. Threaded hole;

[0032] 121. Stepped through hole B;

[0033] 20. Lower mold plate; 21. Lower mold core;

[0034] 211. Lower model block; 212. Lower model base; 213. Inner model pillar; 214. Cavity;

[0035] 30. Lower limit lever; 31. Limiting rod; 32. Limiting block;

[0036] 301. Limiting boss; 302. Eccentric hole;

[0037] 321. Drawing through hole;

[0038] 90. Workpiece. Detailed Implementation

[0039] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0040] The following is for reference Figures 1 to 4 The present invention will be described as follows:

[0041] An ejector mechanism for a stamping die includes an upper template 10 and a lower template 20. An upper die core 11 is fixed on the upper template 10, and a punch 12 is provided inside the upper die core 11. A lower die core 21 is fixed on the lower template 20. The upper die core 11 includes a separately configured upper mold base 111 and an upper mold block 112. The punch 12 is inserted into the upper mold block 112 and its lower end extends to the lower end of the upper mold block 112.

[0042] The upper model block 112 rests against the elastic element 13, and the elastic element 13 is disposed inside the upper model seat 111.

[0043] During molding, the upper mold plate moves downwards towards the lower mold plate. Through the cooperation of the upper and lower mold cores, the workpiece is 90° molded between the upper and lower mold cores. After molding, the upper mold plate moves the upper mold core upwards. After the upper mold core moves the workpiece upwards a certain distance, the force exerted by the elastic component on the upper mold block is greater than the force required for the workpiece to detach from the punch. As a result, the upper mold block moves downwards relative to the punch, pushing the workpiece against the punch, thus completing the demolding process. At the same time, the contact area between the upper mold block and the workpiece is large, resulting in more uniform force distribution on the workpiece and preventing localized deformation caused by the pushing force.

[0044] The elastic element 13 is a nitrogen cylinder A.

[0045] Multiple elastic elements 13 are provided, and the multiple elastic elements 13 are evenly distributed around the circumference, which can make the upper mold block bear force evenly. The multiple elastic elements have greater elasticity, ensuring the smooth demolding of the workpiece.

[0046] The lower mold core 21 includes a lower mold block 211, a lower mold base 212, and an inner mold column 213. The lower mold block 211 is fixed to the lower mold base 212 by screws, and the lower mold base 212 is fixed to the lower template 20. The inner mold column 213 is inserted into the middle of the lower mold block 211 and the lower mold base 212.

[0047] The inner mold column 213 has a cavity 214 formed on it, which corresponds to the punch 12.

[0048] The components of the upper and lower mold cores are set separately, so that maintenance or replacement can be carried out at a low cost when one or more of the lower mold block, upper mold block, punch and inner mold pillar need to be maintained or replaced.

[0049] The upper model base 111 is formed with a stepped through hole A113 with a larger upper part and a smaller lower part, and the upper model block 112 is formed with a threaded hole 114.

[0050] A lower limiting rod 30 is sleeved inside the stepped through hole A113. The lower limiting rod 30 extends through the stepped through hole A113 and is screwed onto the threaded hole 114. The upper end of the lower limiting rod 30 is formed with a limiting boss 301. When the upper model block is moved away from the upper model seat by the elastic force of the elastic element, the upper model block moves together with the lower limiting rod. When the limiting boss of the lower limiting rod contacts the stepped surface of the stepped through hole A, it can no longer move, thus limiting the movement range of the lower model block.

[0051] The limiting boss 301 has an eccentric hole 302 formed on it. A limiting rod 31 is sleeved inside the eccentric hole 302. The limiting rod 31 is fixed to the bottom of the limiting block 32. The limiting block 32 is inserted into the upper end of the stepped through hole A113.

[0052] The eccentrically positioned limit rod prevents the limit boss from rotating, thus preventing the lower limit rod from rotating freely and becoming loose.

[0053] The limiting block 32 has a drawing through hole 321 formed in the middle. The drawing workpiece can be connected to or pass through the drawing through hole, which facilitates the removal of the limiting block and thus facilitates the adjustment and replacement of the upper model block.

[0054] The punch 12 has a stepped through hole B121 with a larger upper part and a smaller lower part. A stepped push rod 14 is sleeved in the stepped through hole B121. The upper end of the stepped push rod 14 abuts against the nitrogen cylinder B15, which is fixed inside the punch 12.

[0055] By adding a nitrogen cylinder and a stepped ejector pin inside the punch, the ejection force can be further increased, thereby ensuring smooth demolding of the workpiece.

[0056] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A ejector mechanism for a stamping die, comprising an upper die plate (10) and a lower die plate (20), wherein an upper die core (11) is fixed on the upper die plate (10), and a punch (12) is provided inside the upper die core (11), and a lower die core (21) is fixed on the lower die plate (20), characterized in that: The upper mold core (11) includes a separate upper mold base (111) and an upper mold block (112), and the punch (12) is inserted into the upper mold block (112) with its lower end extending to the lower end of the upper mold block (112); The upper model block (112) rests against the elastic element (13), which is located inside the upper model seat (111).

2. The ejector mechanism of a stamping die according to claim 1, characterized in that: The elastic element (13) is a nitrogen cylinder A.

3. The ejector mechanism of a stamping die according to claim 1, characterized in that: The elastic element (13) is provided in multiple ways, and the multiple elastic elements (13) are evenly distributed around the circumference.

4. The ejector mechanism of a stamping die according to claim 1, characterized in that: The lower mold core (21) includes a lower mold block (211), a lower mold base (212), and an inner mold column (213). The lower mold block (211) is fixed to the lower mold base (212) by screws, and the lower mold base (212) is fixed to the lower template (20). The inner mold column (213) is inserted into the middle of the lower mold block (211) and the lower mold base (212). The inner model column (213) has a cavity (214) corresponding to the punch (12).

5. The ejector mechanism of a stamping die according to claim 1, characterized in that: The upper model base (111) is formed with a stepped through hole A (113) with a larger upper part and a smaller lower part, and the upper model block (112) is formed with a threaded hole (114). A lower limit pull rod (30) is sleeved inside the stepped through hole A (113). The lower limit pull rod (30) passes through the lower protruding end of the stepped through hole A (113) and is screwed onto the threaded hole (114). The upper end of the lower limit pull rod (30) is formed with a limit boss (301).

6. The ejector mechanism of a stamping die according to claim 5, characterized in that: An eccentric hole (302) is formed on the limiting boss (301). A limiting rod (31) is sleeved inside the eccentric hole (302). The limiting rod (31) is fixed to the bottom of the limiting block (32). The limiting block (32) is inserted into the upper end of the stepped through hole A (113).

7. The ejector mechanism of a stamping die according to claim 6, characterized in that: The middle part of the limiting block (32) is formed with a pull-out through hole (321).

8. The ejector mechanism of a stamping die according to claim 1, characterized in that: The punch (12) has a stepped through hole B (121) with a larger upper part and a smaller lower part. A stepped push rod (14) is sleeved in the stepped through hole B (121). The upper end of the stepped push rod (14) abuts against the nitrogen cylinder B (15).

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