CN219503718U

CN219503718U - Sintering mould for manufacturing tungsten steel mould core

Info

Publication number: CN219503718U
Application number: CN202320120093.6U
Authority: CN
Inventors: 危远志; 张婷
Original assignee: Dongguan Harmony Optical Technology Co ltd
Current assignee: Dongguan Harmony Optical Technology Co ltd
Priority date: 2023-02-06
Filing date: 2023-02-06
Publication date: 2023-08-11
Anticipated expiration: 2033-02-06

Abstract

A sintering mold for manufacturing tungsten steel mold insert, comprising: the die carrier, auxiliary part and a plurality of spacer, the die carrier has a plurality of cylindrical die cavity, the spacer is located the die cavity and with the lateral wall in close contact of die cavity, the spacer has cylindrical accommodation channel, the auxiliary part includes: the base plate and the plurality of cylindrical columns are protruded from the upper surface of the base plate, and the protruded length of each column is half of the difference between the lengths of the die cavity and the spacer bush. The sintering mold directly pushes the spacer bush to the center position of the mold cavity through the cylinder of the auxiliary piece, so that repeated adjustment is not needed each time, and the manufacturing efficiency is greatly improved. In addition, one mold cavity of the sintering mold can simultaneously manufacture two tungsten steel mold cores, so that the manufacturing efficiency is further improved.

Description

Sintering mould for manufacturing tungsten steel mould core

Technical Field

The utility model relates to a sintering mold, in particular to a sintering mold for manufacturing tungsten steel mold cores.

Background

The aspherical glass lens is usually formed by hot-pressing a hot-pressing mold, wherein a tungsten steel mold core is arranged in the hot-pressing mold, in order to reduce the manufacturing cost of the tungsten steel mold core, a hot-pressing part (namely, the part where the aspherical surface is positioned) of the tungsten steel mold core can be formed by using a pure tungsten steel material, and a main body part of the tungsten steel mold core is formed by using a tungsten steel material with higher cobalt content (namely, an impure tungsten steel material).

Currently, manufacturers use sintering molds to manufacture the tungsten steel mold insert, as shown in fig. 1, where the sintering mold in the prior art includes: the mold comprises a mold frame 10 and a positioning column 20, wherein the mold frame 10 is provided with a mold cavity, the positioning column 20 is provided with a groove, and the positioning column 20 is positioned in the mold cavity. Before sintering, firstly placing the pure tungsten steel block 100 in a groove, then installing the positioning column 20 in a mold cavity, ensuring that the tungsten steel block 100 reaches a preset position by adjusting the position of the positioning column 20, then pouring powder 200 of an impure tungsten steel material, inserting a pre-pressing head on the powder 200, pressing the powder, finally placing a sintering mold into the sintering mold, and pressurizing and heating the powder 200 through the pre-pressing head to finish sintering operation of the tungsten steel block 100 and the powder 200.

However, the above-described sintering mold has the following drawbacks:

(1) The position of the positioning column 20 is required to be repeatedly adjusted before each sintering, so that the tungsten steel block 100 is ensured to be positioned at the correct position, and the manufacturing efficiency of the tungsten steel mold core is lower;

(2) Because the positioning column 20 can freely move relative to the die carrier 10, the fit between the two is not very tight, namely, a relatively large fit clearance exists, and the concentricity of the positioning column 20 and the die cavity is difficult to ensure due to the fit clearance, so that the coaxiality of the manufactured die core is deviated;

(3) Since the positioning post 20 is completely inserted into the mold cavity, the process of taking out the positioning post 20 after the sintering is completed is very inconvenient.

Disclosure of Invention

The technical scheme of the utility model is to solve the above problems and provide a sintering mold for manufacturing tungsten steel mold core, the sintering mold comprises: the die carrier, auxiliary part and a plurality of spacer, the die carrier has a plurality of cylindric die cavity, the spacer is located the die cavity and with the lateral wall in close contact of die cavity, the spacer has cylindric accommodation channel, the auxiliary part includes: the base plate and the plurality of cylindrical columns are protruded from the upper surface of the base plate, and the length of the protruded column is half of the difference between the length of the die cavity and the length of the spacer bush.

Further, the sintering mold further includes: the paper cylinders are arranged in the die cavity, one paper cylinder extends from the spacer bush to the upper side of the upper port of the die cavity, and the other paper cylinder extends from the spacer bush to the lower side of the lower port of the die cavity.

Further, the mold cavities, the spacers and the columns are all multiple, and the mold cavities, the spacers and the columns are equal in number, and the spacers are respectively located in the mold cavities.

Further, the die carrier, the spacer bush and the paper cylinder are all formed by graphite materials.

Further, the upper port and the lower port of the mold cavity are provided with a first guiding inclined plane.

Further, both the upper port and the lower port of the receiving channel have a second guide slope.

After the technical scheme is adopted, the utility model has the beneficial effects that:

(1) The sintering mold directly pushes the spacer bush to the center position of the mold cavity through the cylinder of the auxiliary piece, so that repeated adjustment is not needed each time, and the manufacturing efficiency is greatly improved. In addition, one mold cavity of the sintering mold can simultaneously manufacture two tungsten steel mold cores, so that the manufacturing efficiency is further improved.

(2) Because the spacer bush is closely contacted with the side wall of the die cavity, the gap between the spacer bush and the die cavity is smaller, so that the concentricity of the spacer bush and the die cavity can be ensured, and the coaxiality of the manufactured die core is ensured.

(3) The auxiliary piece is provided with the chassis, so that the column body can be taken out of the die cavity in a mode of pulling the chassis, and the use is very convenient.

Drawings

Fig. 1 is a vertical sectional view of a sintering mold in a filling stage in the prior art.

FIG. 2 is a schematic view of a sintering mold according to the present utility model;

FIG. 3 is an exploded view of a sintering mold according to the present utility model;

FIG. 4 is a vertical cross-sectional view of a sintering mold in accordance with the present utility model at a filling stage;

fig. 5 is a vertical sectional view of the sintering mold according to the present utility model in a sintering stage.

Description of the embodiments

The technical scheme of the utility model is further described by the following examples:

the utility model provides a sintering mold for manufacturing tungsten steel mold cores, which is shown in fig. 2-3, and comprises the following components: the mold frame 1, auxiliary member 2 and a plurality of spacer 3, the mold frame 1 has a plurality of cylindrical mold cavities 11, the spacer 3 is positioned in the mold cavities 11 and is closely contacted with the side walls of the mold cavities 11, the spacer 3 has a cylindrical accommodating channel 31, and the auxiliary member 2 comprises: the base plate 21 and a plurality of cylindrical columns 22, the columns 22 are protruded from the upper surface of the base plate 21, and the length of the protruded columns 22 is half of the difference between the lengths of the die cavity 11 and the spacer bush 3.

In connection with fig. 4 to 5, when the above sintering mold is used, firstly, the tungsten steel block 100 formed by two pure tungsten steel materials is placed into the accommodating channel 31 of the spacer bush 3, then the spacer bush 3 is placed into the mold cavity 11 of the mold frame 1, then the column 22 of the auxiliary member 2 is inserted into the mold cavity 11 from bottom to top, because the protruding length of the column 22 is half of the difference between the length of the mold cavity 11 and the length of the spacer bush 3, the spacer bush 3 just reaches the center position of the mold cavity 11 under the pushing action of the column 22, at this time, the powder 200 of the non-pure tungsten steel material is poured into the upper end of the mold cavity 11, the cylindrical pre-pressing block 5 is inserted into the upper end of the mold cavity 11, the powder 200 of the upper end is pre-pressed, then the sintering mold is turned up and down, the auxiliary member 2 is taken out, the powder 200 of the non-pure tungsten steel material is also poured into the lower end of the mold cavity 11, the other pre-pressing block 5 is inserted into the lower end of the mold cavity, the tungsten steel block 200 is finally placed into the sintering apparatus, the sintering apparatus pressurizes and the powder 200 by the pre-pressing block 5, and the powder 200 is heated by the pre-pressing block 5, and the powder is combined with the powder to form the composite steel mold 100. In the process of manufacturing tungsten steel mold cores in batches, the weight of the powder 200 poured into the tungsten steel mold cores each time can be ensured to be equal in a weighing mode, so that the consistency of the tungsten steel mold cores manufactured in batches is ensured.

It should be noted that, since the spacer 3 does not need to be moved after reaching the center of the mold cavity 11, even if the spacer 3 is in close contact with the sidewall of the mold cavity 11, the use is not affected. While the diameter of the pre-pressing block 5 is smaller than the diameter of the mould cavity 11 with a relatively large gap between them, so that the pre-pressing block 5 can move freely in the mould cavity 11.

Wherein, the sintering mold directly pushes the spacer bush 3 to the center of the mold cavity 11 through the cylinder of the auxiliary piece 2, so that repeated adjustment is not needed each time, and the manufacturing efficiency is greatly improved. In addition, one mold cavity 11 of the sintering mold can simultaneously manufacture two tungsten steel mold cores, thereby further improving the manufacturing efficiency.

The spacer bush 3 is tightly contacted with the side wall of the die cavity 11, and the gap between the spacer bush 3 and the side wall of the die cavity 11 is smaller, so that the concentricity of the spacer bush 3 and the die cavity 11 can be ensured, and the coaxiality of the manufactured die core is ensured.

Wherein, since the auxiliary piece 2 is provided with the chassis 21, the column 22 can be taken out from the die cavity 11 by pulling the chassis 21, which is convenient for use.

For the conventional sintering mold, a release agent is usually added into the mold cavity before sintering to ensure that the mold core is smoothly taken out, and during the pressing process of the pre-pressing head, the powder 200 is diffused to the side wall of the mold cavity, so that the condition that the release agent is mixed into the powder 200 easily occurs, and the main body part of the tungsten steel mold core is mixed with impurities. In order to solve the technical problem, the sintering mold of the present utility model further comprises: two paper drums 4 are arranged in the mould cavity 11 of the plurality of paper drums 4, one paper drum 4 extends from the spacer bush 3 to the upper side of the upper port of the mould cavity 11, and the other paper drum 4 extends from the spacer bush 3 to the lower side of the lower port of the mould cavity 11. Before pouring the powder 200, the paper tube 4 is placed in the mold cavity 11, and after sintering is completed, the tungsten steel mold core and the paper tube 4 are taken out together, so that smooth taking out of the tungsten steel mold core can be ensured, and the problem that the powder 200 is mixed with impurities can be avoided.

Specifically, the mold cavities 11, the spacers 3 and the columns 22 are all multiple, and the mold cavities 11, the spacers 3 and the columns 22 are equal in number, and the spacers 3 are respectively located in the mold cavities 11. In the manufacturing process, the number of the pre-pressing blocks 5 is twice that of the die cavities 11, and the powder 200 at the upper end and the lower end of the die cavities 11 is respectively pressurized and heated by the pre-pressing blocks 5, so that the manufacturing efficiency of the tungsten steel die core can be further improved by utilizing the multi-die-cavity structure.

Specifically, the die carrier 1, the spacer 3 and the paper tube 4 are all formed of graphite material. The graphite material has good heat resistance and thermal conductivity, and can meet the sintering requirement of tungsten steel materials. The pre-pressing block 5 is also formed of a graphite material, and the auxiliary member 2 is formed of a stainless steel material.

Specifically, the upper and lower ports of the moulding cavity 11 each have a first guiding ramp 12. By arranging the first guide inclined plane 12, the insertion of the auxiliary piece 2, the spacer bush 3 and the paper tube 4 can be guided, and the operation of workers is facilitated.

More specifically, the upper port and the lower port of the accommodation channel 31 each have a second guide slope 32. By providing the second guide inclined surface 32, the two tungsten steel blocks 100 can be placed in the steel box, so that the steel box can be conveniently operated by workers.

Claims

1. A sintering mould for manufacturing tungsten steel mould core is characterized in that: the sintering mold includes: the die carrier, auxiliary part and a plurality of spacer, the die carrier has a plurality of cylindric die cavity, the spacer is located the die cavity and with the lateral wall in close contact of die cavity, the spacer has cylindric accommodation channel, the auxiliary part includes: the base plate and the plurality of cylindrical columns are protruded from the upper surface of the base plate, and the length of the protruded column is half of the difference between the length of the die cavity and the length of the spacer bush.

2. The sintering mold for manufacturing tungsten steel mold insert according to claim 1, wherein: the sintering mold further includes: the paper cylinders are arranged in the die cavity, one paper cylinder extends from the spacer bush to the upper side of the upper port of the die cavity, and the other paper cylinder extends from the spacer bush to the lower side of the lower port of the die cavity.

3. The sintering mold for manufacturing tungsten steel mold insert according to claim 1, wherein: the mold cavities, the spacers and the columns are all multiple, the number of the mold cavities, the number of the spacers and the number of the columns are equal, and the spacers are respectively positioned in the mold cavities.

4. The sintering mold for manufacturing tungsten steel mold insert according to claim 1, wherein: the die carrier, the spacer bush and the paper cylinder are all formed by graphite materials.

5. The sintering mold for manufacturing tungsten steel mold insert according to claim 1, wherein: the upper port and the lower port of the die cavity are respectively provided with a first guiding inclined plane.

6. The sintering mold for manufacturing tungsten steel mold according to claim 5, wherein: the upper port and the lower port of the accommodating channel are provided with second guiding inclined planes.