CN202411414U - Mould - Google Patents

Abstract

The utility model provides a mould, which comprises a mandrel, an outer upper die, a female die, an inner lower die, an outer lower die, a new inner upper die and a middle lower die, wherein the mandrel takes the shape of a column; the new inner upper die is a hollow column body with a circular-ring section and is sheathed outside the upper half section of the mandrel; the inner lower die is a hollow column body with a circular-ring section and is sheathed outside the lower half section of the mandrel; the new inner upper die is not in contact with the inner lower die; the middle lower die is sheathed outside the inner lower die and is in tight contact with the inner lower die; a boss is arranged on the middle lower die, and the boss is surrounded outside the new inner upper die and is not in contact with the new inner upper die; the outer lower die is sheathed outside the middle lower die and is in tight contact with the middle lower die; and the female die is sheathed outside the outer upper die and the outer lower die and is in tight contact with the outer upper die and the outer lower die. The mould has the advantages of reducing the mould cost, being excellent in the quality and the appearance of a product, lowering the requirement of equipment, and being easier in production.

Description

A kind of mould

Technical field

The utility model relates to the mould that field of powder metallurgy is used, and specifically, is a kind of simple in structure, and can improve the mould that product density distributes.

Background technology

All the time, belt pulley adopts the powder metallurgical technique manufacturing more in the automobile engine, and along with the development of automobile industry, belt pulley has adopted inclined design in the increasing engine.After adopting inclined design, the face shaping of belt pulley becomes more complicated more than in the past in the product, when continuation is produced through powder metallurgy process, has following drawback:

(1) need split into more stamping, cause the manufacturing cost of mould higher;

(2) as shown in Figure 1, patrix 1, middle patrix 2, outer patrix 3, former 4, plug 5, interior counterdie 6, middle counterdie 1, middle counterdie 27 and outer counterdie 9 in comprising in the mould; Wherein middle counterdie 1 and middle counterdie 27, owing to be two stampings, the position of corresponding these two parts of product generally can synchronous forming, product lacks the limit arrisdefect easily at the interface of two stampings, causes product appearance not good;

(3) split into more stamping after, need last three times four mould bases just can meet the demands, to equipment require highly, require the compacting press not only to need more complicated mould bases structure, also need equipment to have more pressing function could satisfy production;

(4) powder flowbility is not good in the pressing process, and each areal concentration is usually different, causes parts quality not good.

The utility model content

Problems such as the purpose of the utility model is to provide a kind of mould, and the product cost that existing mold processes is high to solve, product appearance and quality are not good.

For reaching above-mentioned purpose, the technical scheme that the utility model provides is:

A kind of mould comprises plug, outer patrix, former, interior counterdie and outer counterdie, it is characterized in that, also comprises new interior patrix and middle counterdie;

Said plug is a column;

Said new interior patrix is that the cross section is the hollow cylinder of annulus, is socketed in the upper half mandrel outer;

Counterdie is that the cross section is the hollow cylinder of annulus in said, is socketed in down the half mandrel outer;

Said new interior patrix does not contact with interior counterdie;

Outside the counterdie, both closely contacted in lower die-sleeve was connected in said;

Counterdie is provided with a boss in said, said boss be trapped among new in outside the patrix, and with new on

Mould closely contacts, and the end face of boss is the annular slope that tends to plug;

Said outer Upper Die-sleeve is connected on outside the new interior patrix, and does not contact with new interior patrix;

Said outer lower die-sleeve is connected on outside the middle counterdie, and closely contacts with middle counterdie;

Said former is socketed in outside outer patrix and the outer counterdie, and is tight the contact with both.

The advantage of the utility model is:

(1) reduces stamping quantity, reduced die cost;

(2) with original middle counterdie one and middle counterdie two synthetic middle stampings of counterdie, do not have the situation of product at the scarce easily limit of interface arrisdefect, product appearance is better;

(3) reduced stamping quantity, reduced requirement, more be prone to produce equipment;

(4) raised head face be made as one tend to plug annular slope, moving powder and pressing stage because raised head face has certain gradient, powder flowbility is good, each regional powder density is even, the parts quality of processing is good.

Description of drawings

Fig. 1 is the generalized section of mould in the prior art;

Fig. 2 is the generalized section of the utility model mould;

Among the figure shown in the label as follows:

1, interior patrix; 2, middle patrix; 3, outer patrix; 4, former;

5, plug; 6, interior counterdie; 7, middle counterdie two; 8, middle counterdie one;

9, outer counterdie; 10, middle counterdie; 11, boss; 12, end face;

13, new interior patrix; 14, product.

The specific embodiment

Introduce the specific embodiment of a kind of mould of the utility model below in conjunction with accompanying drawing, but it may be noted that the enforcement of the utility model is not limited to following embodiment.

As shown in Figure 2, a kind of mould comprises plug 5, outer patrix 3, former 4, interior counterdie 6, outer counterdie 9, new interior patrix 13 and middle counterdie 10; Said plug 5 is a column; Said new interior patrix 13 is that the cross section is the hollow cylinder of annulus, is socketed in outside the upper half plug 5; Counterdie 6 is that the cross section is the hollow cylinder of annulus in said, is socketed in down outside the half plug 5; Said new interior patrix 13 does not contact with interior counterdie 6; Outside the counterdie 6, both closely contacted in counterdie 10 was socketed in said; Counterdie 10 is provided with a boss 11 in said, and said boss 11 is trapped among outside the new interior patrix 13, and closely contacts with new interior patrix 13, and the end face 12 of boss 11 is the annular slope that tends to plug 5; Said outer patrix 3 is socketed in outside the new interior patrix 13, and does not contact with new interior patrix 13; Said outer counterdie 9 is socketed in outside the middle counterdie 10, and closely contacts with middle counterdie 10; Said former 4 is socketed in outside outer patrix 3 and the outer counterdie 9, and is tight the contact with both.

The mold work process of the utility model mainly is divided into the dress powder, moves powder, compacting and demoulding four-stage.Because middle counterdie 10 is provided with a boss 11; And the end face 12 of boss 11 is the annular slope that tends to plug 5, thus moving powder and pressing stage, owing to powder is also asynchronous from the time that boss 11 gets into new interior patrix 13 all around; Cause the unbalance stress of powder in pressing process; Thereby the generation flow of powder makes powder flow to density regions from high-density region, finally reaches the purpose of each areal concentration homogenising.The meeting demoulding after powder compaction is accomplished after the demoulding gets final product product 14 taking-ups.

The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.

Claims (1)

1. a mould comprises plug, outer patrix, former, interior counterdie and outer counterdie, it is characterized in that, also comprises new interior patrix and middle counterdie;

Said plug is a column;

Said new interior patrix is that the cross section is the hollow cylinder of annulus, is socketed in the upper half mandrel outer;

Counterdie is that the cross section is the hollow cylinder of annulus in said, is socketed in down the half mandrel outer;

Said new interior patrix does not contact with interior counterdie;

Outside the counterdie, both closely contacted in lower die-sleeve was connected in said;

Counterdie is provided with a boss in said, and said boss is trapped among outside the new interior patrix, and closely contacts with new interior patrix, and the end face of boss is the annular slope that tends to plug;

Said outer Upper Die-sleeve is connected on outside the new interior patrix, and does not contact with new interior patrix;

Said outer lower die-sleeve is connected on outside the middle counterdie, and closely contacts with middle counterdie;

Said former is socketed in outside outer patrix and the outer counterdie, and is tight the contact with both.

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