CN216183059U

CN216183059U - Cold pressing die of powder cold pressing forming machine

Info

Publication number: CN216183059U
Application number: CN202122609716.XU
Authority: CN
Inventors: 袁小华
Original assignee: Zhangzhou Kaihua Machinery Co ltd
Current assignee: Zhangzhou Kaihua Machinery Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-04-05
Anticipated expiration: 2031-10-28

Abstract

The utility model belongs to the technical field of powder cold pressing, and particularly relates to a cold pressing die of a powder cold pressing forming machine, which comprises an upper die base and a lower die base which are vertically distributed, wherein the bottom surface of the upper die base is fixedly connected with a plurality of male dies, the lower die base comprises a base and a template which is vertically and slidably connected to the top of the base, the surface of the template is provided with a plurality of cavities which are matched with the male dies and open up and down, the base and the template are supported by four reset columns to form a discharging gap, and four corners of the bottom surface of the upper die base are vertically and slidably connected with pre-jacking columns for pre-pressing the template; in the pressing process, not only the pay-off is carried out the precompression, the condition that the powder scatters can not appear in the pay-off process simultaneously to reduced the suppression stroke, improved suppression efficiency, the upper die base resets and drives the external promotion structure of bottom demoulding cooperation formation unloading, can also extend to the automated processing cooperation, has very high ductility and practicality.

Description

Cold pressing die of powder cold pressing forming machine

Technical Field

The utility model belongs to the technical field of powder cold pressing, and particularly relates to a cold pressing die of a powder cold pressing forming machine.

Background

Powder press molding is a method of powder molding using an applied pressure in a press mold, and is also called powder press molding. The pressing and forming process comprises powder loading, pressing and demolding, and the powder is pressed and formed in the cavity mainly through a male die in a common pressing mode.

SUMMERY OF THE UTILITY MODEL

The utility model provides a cold pressing die of a powder cold pressing forming machine, which has the characteristics of powder loading and prepressing, capability of ensuring equal powder amount in each cavity, and capability of quickly demoulding and taking materials.

The utility model provides the following technical scheme: the automatic feeding device comprises an upper die base and a lower die base which are vertically distributed, wherein a plurality of male dies are fixedly connected to the bottom surface of the upper die base, the lower die base comprises a base and a template which is vertically connected to the top of the base in a sliding mode, a plurality of cavities which are matched with the male dies and are open up and down are formed in the surface of the template, the base and the template are supported through four reset columns to form a discharging gap, four corners of the bottom surface of the upper die base are vertically connected with pre-jacking columns for pre-pressing the template in a sliding mode, four feeding pipes which are distributed at equal intervals are arranged in the template, the feeding pipes are arranged on one side of the cavities, and a plurality of feeding pipes which are communicated with the cavities are fixedly connected to the feeding pipes.

The two sides of the base are fixedly connected with two guide pillars, and the two sides of the upper die base are fixedly connected with two guide sleeves matched with the guide pillars.

Reset holes are formed in four corners of the bottom surface of the template, and the reset columns are elastically connected with the reset holes through reset springs.

The four corners of the bottom surface of the upper die base are provided with shrinkage holes, the pre-ejection columns are connected inside the shrinkage holes in a sliding mode, and the interior of each shrinkage hole is connected with the pre-ejection columns in an elastic sliding mode through ejection springs.

Wherein, the stiffness coefficient of the liftout spring is greater than the stiffness coefficient of the return spring.

The diameter of the bottom surface of the pre-jacking column is larger than the diameter of the middle section of the pre-jacking column.

Wherein, the inner wall of the cavity is attached with a resistance reducing film.

The length of the pre-ejection column is greater than that of the male die, and the depth of the shrinkage hole is greater than that of the pre-ejection column.

The utility model has the beneficial effects that:

the closed delivery material that utilizes template and die holder utilizes pay-off pressure to carry out pre-compaction to the powder, can not appear the condition that the powder scatters simultaneously at the pay-off process to reduced the suppression stroke, improved suppression efficiency, the upper die base resets and drives the external pushing structure of bottom demoulding cooperation formation unloading, has improved unloading speed, can also extend to automatic processing cooperation, has very high ductility and practicality.

The parts of the device not involved are the same as or can be implemented using prior art.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a perspective view of the present invention with the upper mold base disassembled;

FIG. 3 is a schematic front view of the present invention;

FIG. 4 is a schematic front cross-sectional view of a retraction hole and a reduction hole of the present invention;

FIG. 5 is a schematic front cross-sectional view of a mold cavity of the present invention;

in the figure: 1. an upper die holder; 11. a guide sleeve; 12. a male die; 13. a shrink hole; 14. a material ejecting spring; 2. a guide post; 3. a lower die holder; 31. a base; 32. a reset column; 33. a template; 34. a cavity; 35. a reset hole; 36. a return spring; 4. a feed pipe; 41. a casting pipe; 5. pre-jacking the column.

Detailed Description

Referring to fig. 1-5, the present invention provides the following technical solutions: including vertical distribution's upper die base 1 and die

holder

3, 1 bottom surface fixedly connected with a plurality of terrace die 12 of upper die base, die holder 3 includes base 31 and perpendicular sliding connection at the template 33 at base 31 top, open die cavity 34 about a plurality of and terrace die 12 matched with is seted up on the template 33 surface, base 31 supports through four reset posts 32 with template 33 and forms row material clearance, the equal perpendicular sliding connection in bottom surface four corners of upper die base 1 has the fore-set post 5 that is used for the pre-compaction of template 33, be equipped with the conveying pipe 4 of four equidistance distributions in the template 33, conveying pipe 4 is located and sets up in one side of die cavity 34, conveying pipe 4 is last fixedly connected with a plurality of and the input pipe 41 that die cavity 34 is linked together.

In this embodiment: the top of the upper die base 1 is fixedly connected with the output end of a press machine, the male die 12 corresponds to a die cavity 34 at the top of the template 33, but when the die cavity 34 is used, the upper end and the lower end of the die cavity 34 are in an open structure, the reset column 32 supports the template 33 to cause that materials cannot be accumulated at the bottom of the die cavity 34, at the moment, the materials cannot be delivered, therefore, the bottom surface of the upper die base 1 is provided with the pre-ejecting column 5, the pre-ejecting column 5 is used for pushing the template 33 downwards in advance when the upper die base 1 descends, at the moment, the die cavity 34 is closed as the template 33 slides towards the bottom of the base 31, at the moment, the male die 12 is positioned in the die cavity 34 and above the feeding pipe 41, the feeding pipe 4 conveys powder into the die cavity 34 through an external feeding pump, at the moment, the powder is accumulated in the die cavity 34, when the powder is accumulated to the bottom surface of the male die 12, the feeding pump has feeding pressure, at the moment, the powder is extruded by the feeding pressure, and then reduce the material gap, until can't enter supplies in this die cavity 34, stop conveying at this moment, and at this moment press the supplies through the die cavity 34, because the powder makes the deformation amount that the powder presses reduce through the precompression of the end of delivering material, and then the self length of the effective reduction terrace die 12, reduce the movement stroke, and then raise the working efficiency, meanwhile when the upper die holder 1 rises the preforming plate 33 to separate, the post 32 that resets at this moment drives the shaping plate 33 to reset, and then make the shaping plate 33 rise, the finished product pressed at this moment is located at the top of the base 31, can push the supplies out from one side directly through the small push pedal that is externally positioned at this moment, the whole apparatus is easy and convenient to operate, not only carry on the precompression to the pay-off, the situation that the powder scatters will not appear at the same time in the course of pay-off, and reduced the pressing stroke, raise the pressing efficiency, the upper die holder 1 resets and drives the demoulding of the bottom to cooperate with the external pushing structure to form the blanking, can also be expanded to automatic processing matching, and has high ductility and practicability.

Two guide pillars 2 are fixedly connected to both sides of the base 31, and two guide sleeves 11 matched with the guide pillars 2 are fixedly connected to both sides of the upper die holder 1; the guide post 2 is mainly installed on the side surface to improve the inner processing space in order to play a role of connecting and guiding the base 31 and the upper die base 1.

Reset holes 35 are formed in four corners of the bottom surface of the shaping plate 33, and the reset columns 32 are elastically connected with the reset holes 35 through reset springs 36; the reset hole 35 guides the reset column 32, so that the template 33 can only slide vertically upwards, and the reset spring 36 can drive the template 33 to rebound when the upper die base 1 rises.

Four corners of the bottom surface of the upper die holder 1 are provided with shrinkage holes 13, the pre-ejection column 5 is connected inside the shrinkage holes 13 in a sliding mode, and the inside of each shrinkage hole 13 is elastically connected with the pre-ejection column 5 in a sliding mode through an ejection spring 14; the shrinkage hole 13 is mainly used for accommodating the pre-ejection column 5, and when the upper die base 1 continues to descend, the pre-ejection column 5 needs to be accommodated into the shrinkage hole 13, so that interference on the movement stroke of the male die 12 cannot be generated.

The stiffness coefficient of the ejector spring 14 is larger than that of the return spring 36; in order to prevent the ejector spring 14 from deforming when the ejector spring 14 performs pre-jacking operation on the shaping plate 33, at the moment, the return spring 36 firstly drives the shaping plate 33 to move downwards to be sealed with the base 31.

The diameter of the bottom surface of the pre-jacking column 5 is larger than the diameter of the middle section of the pre-jacking column 5; the contact is more stable because the area of the bottom surface of the pre-ejection post 5 is increased.

A resistance reducing film is attached to the inner wall of the cavity 34; the drag reduction membrane can adopt the teflon film, also can adopt the teflon coating, and the main objective is in order to make the inner wall smooth, and the powder preforming after making the compression drops more easily, otherwise needs follow-up operating personnel to shake the board 33 and break away from.

The length of the pre-ejection column 5 is greater than that of the male die 12, and the depth of the shrinkage hole 13 is greater than that of the pre-ejection column 5; because the pre-ejection column 5 firstly needs the contact of the pre-shaping plate 33, the length of the pre-ejection column 5 is larger than that of the punch 12, and in order to ensure that the movement stroke of the punch 12 cannot be interfered, the depth of the shrinkage hole 13 is larger than that of the pre-ejection column 5, so that the pre-ejection column 5 can be completely accommodated.

The working principle and the using process of the utility model are as follows: the top of an upper die base 1 is fixedly connected with the output end of a press machine, a lower die base 3 is fixedly connected with a mounting surface, a feeding pipe 4 is communicated with an external powder supply mechanism through a multi-channel joint, the upper die base 1 is driven to move downwards through the press machine, a pre-ejection column 5 is in contact with a shaping plate 33 to drive the shaping plate 33 to move downwards, the bottom of a cavity 34 is closed, a male die 12 is positioned inside the cavity 34 and above a feeding pipe 41, the feeding pipe 4 conveys powder into the cavity 34 through an external feeding pump, the powder is accumulated in the cavity 34, when the powder is accumulated to the bottom of the male die 12, the powder is extruded by the feeding pressure due to the feeding pressure of the feeding pump, material gaps are reduced until the material cannot enter the cavity 34, the conveying is stopped, the material is pressed through the cavity 34, the pre-ejection column 5 is accommodated in a shrinkage hole 13 during pressing, elastic deformation takes place for liftout spring 14, because the powder makes the deformation volume of powder suppression reduce through the pre-compaction of material conveying end, and then the effectual self length that reduces terrace die 12, reduce the motion stroke, and then improve work efficiency, simultaneously when upper die base 1 rises template 33 separation in advance, the post 32 that resets this moment drives template 33 through reset spring 36 inside reset hole 35 and resets, and then make template 33 rise, the finished product of suppression this moment is located the top of base 31, can directly push out the material from one side this moment through external little push pedal can.

Claims

1. The utility model provides a cold pressing mold of powder cold pressing forming machine which characterized in that: the automatic feeding device comprises an upper die base and a lower die base which are vertically distributed, wherein a plurality of male dies are fixedly connected to the bottom surface of the upper die base, the lower die base comprises a base and a template which is vertically connected to the top of the base in a sliding mode, a plurality of cavities which are matched with the male dies and are open up and down are formed in the surface of the template, the base and the template are supported through four reset columns to form a discharging gap, four corners of the bottom surface of the upper die base are vertically connected with pre-jacking columns for pre-pressing the template in a sliding mode, four feeding pipes which are distributed at equal intervals are arranged in the template, the feeding pipes are arranged on one side of the cavities, and a plurality of feeding pipes which are communicated with the cavities are fixedly connected to the feeding pipes.

2. The cold press mold of the powder cold press molding machine according to claim 1, characterized in that: two guide pillars are fixedly connected to two sides of the base, and two guide sleeves matched with the guide pillars are fixedly connected to two sides of the upper die base.

3. The cold press mold of the powder cold press molding machine according to claim 1, characterized in that: reset holes are formed in four corners of the bottom surface of the template, and the reset columns are elastically connected with the reset holes through reset springs.

4. The cold press mold of the powder cold press molding machine according to claim 3, characterized in that: shrinkage holes are formed in four corners of the bottom surface of the upper die base, the pre-ejection columns are connected inside the shrinkage holes in a sliding mode, and the interior of each shrinkage hole is connected with the pre-ejection columns in an elastic sliding mode through ejection springs.

5. The cold press mold of the powder cold press molding machine according to claim 4, characterized in that: the stiffness coefficient of the ejection spring is larger than that of the return spring.

6. The cold press mold of the powder cold press molding machine according to claim 1, characterized in that: the diameter of the bottom surface of the pre-jacking column is larger than the diameter of the middle section of the pre-jacking column.

7. The cold press mold of the powder cold press molding machine according to claim 1, characterized in that: and the inner wall of the cavity is attached with a resistance reducing film.

8. The cold press mold of the powder cold press molding machine according to claim 4, characterized in that: the length of the pre-ejection column is larger than that of the male die, and the depth of the shrinkage hole is larger than that of the pre-ejection column.