Improved structure of force transmission column of die

Abstract

The utility model discloses an improved structure of a force transmission column of a die. The improved structure comprises an upper die base, a fixing plate, a discharging base plate, a set screw, a set spring and the force transmission column, the set screw, the set spring and the force transmission column are installed in the upper die base, and the gap between the positioning column on the force transmission column and the positioning hole in the discharging base plate is smaller than the gap between the force transmission column and the guide hole in the fixing plate. In the assembling process, the force transmission column with the positioning column can be automatically guided into the positioning hole of the discharging plate seat, and the gap between the positioning column on the force transmission column and the positioning hole in the discharging seat plate is smaller than the gap between the force transmission column and the guide hole in the fixing plate; in this way, it can be guaranteed that no friction phenomenon exists between the force transmission column and the fixing plate base plate and the fixing plate in the die production process, metal powder is avoided, and the problem that the appearance of the lead frame is contaminated by the metal powder is thoroughly solved.

Description

Technical Field

[0001] The utility model relates to a cold stamping die, in particular to an improved structure of a die force transmission column. Background Art

[0002] Lead frame cutting and denting is the last process in lead frame production. After the process is completed, it is packaged and shipped. No external factors that affect the appearance of the frame can appear in the process, such as Figure 1 , Figure 2 As shown, in the force transfer column structure of the traditional concave cutting mold, there is a gap between the force transfer column 1' and the corresponding guide hole 21' on the fixed plate pad 2' and the guide hole 31' of the fixed plate 3'. However, in the actual production process, the force transfer column 1' will be displaced, and will often rub against the guide hole 31' of the fixed plate 3' and the guide hole 21' of the fixed pad 2'. The friction between the metals will produce fine powder. When it reaches a certain amount, it will fall onto the lead frame product along the gap of the unloading plate seat 4' or the flow of air, resulting in appearance contamination. The traditional method is to remove the mold for cleaning after a certain amount of production. In this way, the production efficiency is relatively low and the problem of appearance contamination cannot be completely solved. This is very troublesome for the production of some high-end lead frames. Utility Model Content

[0003] The utility model aims to provide an improved structure of a die force transmission column which can avoid the generation of metal powder.

[0004] To achieve the above purpose, the technical solution of the utility model is:

[0005] The utility model discloses an improved structure of a force transmission column of a mold, comprising an upper mold base, a fixed plate, a discharge seat plate, a stop screw, a stop spring and a force transmission column; the upper mold base is fixed together with the fixed plate, the bottom surface of the fixed plate is opposite to the top surface of the discharge seat plate, a column hole is provided on the upper mold base, the stop screw is fixedly screwed on the upper part of the column hole of the upper mold base, the stop spring is sleeved in the column hole, the upper end of the stop spring rests on the stop screw, the lower end of the stop spring rests on the force transmission column, the countersunk gap at the top of the force transmission column is sleeved in the column hole of the upper mold base, the lower end gap of the force transmission column passes through the guide hole of the fixed plate and then extends to the top surface of the discharge seat plate; the discharge seat plate is provided with a positioning hole, a positioning column is protruded downward at the lower end of the force transmission column and the positioning column is located directly above the positioning hole of the discharge seat plate, and the positioning column gap on the force transmission column is inserted into the positioning hole on the discharge seat plate; the gap between the positioning column on the force transmission column and the positioning hole on the discharge seat plate is smaller than the gap between the force transmission column and the guide hole on the fixed plate.

[0006] The lower end of the positioning column on the force transmission column is a cone.

[0007] The utility model also includes a fixed plate pad; the upper mold base, the fixed plate pad, and the fixed plate are fixed together in sequence, the guide holes on the fixed plate pad are connected with the guide holes of the fixed plate, and the lower part of the force transmission column passes through the guide holes on the fixed plate pad and the guide holes of the fixed plate in sequence.

[0008] The guide hole on the fixing plate pad has the same diameter as the guide hole on the fixing plate.

[0009] After adopting the above scheme, since a positioning column with a cone positioning is protruded downward at the lower end of the force transmission column of the utility model, and a positioning hole for positioning is added at the corresponding position of the unloading plate seat, the positioning column is inserted into the positioning hole on the unloading seat plate. During assembly, the force transmission column with the positioning column will automatically guide into the positioning hole of the unloading plate seat. Since the gap between the positioning column on the force transmission column and the positioning hole on the unloading seat plate is smaller than the gap between the force transmission column and the guide hole on the fixed plate, it can be ensured that there will be no friction between the force transmission column and the fixed plate pad and the fixed plate during the mold production process, thereby avoiding the generation of metal powder and completely solving the problem of metal powder contamination on the appearance of the lead frame.

[0010] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a cross-sectional view of a traditional force transmission column structure;

[0012] Figure 2 It is a top view of the traditional force transmission column structure;

[0013] Figure 3 It is a cross-sectional view of the utility model. DETAILED DESCRIPTION

[0014] like Figure 3 As shown, the utility model is an improved structure of a force transmission column of a mold, comprising an upper mold base 1, a fixed plate pad 2, a fixed plate 3, a discharge seat plate 4, a stop screw 5, a stop spring 6, and a force transmission column 7.

[0015] The upper die base 1, fixed plate pad 2, and fixed plate 3 are fixed together in sequence, and the bottom surface of the fixed plate 3 is opposite to the top surface of the unloading seat plate 4. Guide holes 21 and 31 are provided on the fixed plate pad 2 and the fixed plate 3. The guide hole 21 on the fixed plate pad 2 is connected with the guide hole 31 of the fixed plate 3. A column hole 11 is provided on the upper die base 1, and the stop screw 5 is fixedly screwed on the upper part of the column hole 11 of the upper die base 1. The stop spring 6 is sleeved in the column hole 11. The upper end of the stop spring 6 rests on the stop screw 5, and the lower end of the stop spring 6 rests on the force transmission column 7. The countersunk head 71 at the top of the force transmission column 7 is gapped in the column hole 11 of the upper die base 1, and the lower part of the force transmission column 7 passes through the guide hole 21 on the fixed plate pad 2 and the guide hole 31 of the fixed plate 3 in sequence and then extends to the top surface of the unloading seat plate 4.

[0016] The unloading seat plate 4 is provided with a positioning hole 41, and a positioning column 72 is protruding downward from the lower end of the force transmission column 7. The lower end of the positioning column 72 is a cone. The positioning column 72 is located directly above the positioning hole 41 of the unloading seat plate 4. The positioning column 72 on the force transmission column 7 is inserted into the positioning hole 41 on the unloading seat plate 4 with a gap; the gap between the positioning column 72 on the force transmission column 7 and the positioning hole 41 on the unloading seat plate 4 is smaller than the gap between the force transmission column 7 and the guide hole 31 on the fixed plate 3.

[0017] In this embodiment, the guide hole 21 on the fixed plate pad 2 and the guide hole 31 on the fixed plate 3 have the same diameter; the gap between the positioning column 72 on the force transmission column 7 and the positioning hole 41 on the unloading seat plate 4 is 0.4 mm, and the gap between the force transmission column 7 and the guide hole 31 on the fixed plate 3 is 1 mm.

[0018] The working principle of this utility model:

[0019] The positioning column 72 at the lower end of the force transmission column 7 is inserted into the positioning hole 41 on the unloading seat plate 4 with a gap. During assembly, the force transmission column 7 with the positioning column 72 will be automatically guided into the positioning hole 41 of the unloading plate seat 4. Since the gap between the positioning column 72 on the force transmission column 7 and the positioning hole 41 on the unloading seat plate 4 is smaller than the gap between the force transmission column 7 and the guide hole 31 on the fixed plate 3, it can be ensured that there will be no friction between the force transmission column 7 and the fixed plate pad 2 and the fixed plate 3 during the mold production process, thereby avoiding the generation of metal powder.

[0020] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of implementation of the present invention. That is, equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the specification should still fall within the scope covered by the patent of the present invention.

Claims

1. An improved structure of a force transmission column of a mold, comprising an upper mold base, a fixed plate, a discharge seat plate, a stop screw, a stop spring, and a force transmission column; the upper mold base is fixed together with the fixed plate, the bottom surface of the fixed plate is opposite to the top surface of the discharge seat plate, a column hole is opened on the upper mold base, the stop screw is fixedly screwed on the upper part of the column hole of the upper mold base, the stop spring is sleeved in the column hole, the upper end of the stop spring is pressed against the stop screw, the lower end of the stop spring is pressed against the force transmission column, the countersunk gap at the top of the force transmission column is sleeved in the column hole of the upper mold base, and the lower end of the force transmission column passes through the guide hole of the fixed plate and then extends to the top surface of the discharge seat plate; the characteristics are: The unloading seat plate is provided with a positioning hole, and a positioning column is protruding downward from the lower end of the force transmission column and is located directly above the positioning hole of the unloading seat plate. The positioning column gap on the force transmission column is inserted into the positioning hole on the unloading seat plate; the gap between the positioning column on the force transmission column and the positioning hole on the unloading seat plate is smaller than the gap between the force transmission column and the guide hole on the fixed plate.

2. According to the improved structure of the mold force transmission column of claim 1, it is characterized in that: The lower end of the positioning column on the force transmission column is a cone.

3. According to the improved structure of the mold force transmission column of claim 1, it is characterized in that: It also includes a fixed plate pad; the upper mold base, the fixed plate pad, and the fixed plate are fixed together in sequence, the guide holes on the fixed plate pad are connected to the guide holes of the fixed plate, and the lower part of the force transmission column passes through the guide holes on the fixed plate pad and the guide holes of the fixed plate in sequence.

4. The improved structure of the mold force transmission column according to claim 3 is characterized in that: The guide hole on the fixing plate pad has the same diameter as the guide hole on the fixing plate.

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