CN202726016U

CN202726016U - Die-casting die

Info

Publication number: CN202726016U
Application number: CN 201220125750
Authority: CN
Inventors: 马作坡; 黄磊; 于洪亮; 丁涛; 尚守亮; 霍天常; 杨超凡
Original assignee: AMGAIN SHANDONG MAGNESIUM Co Ltd
Current assignee: AMGAIN SHANDONG MAGNESIUM Co Ltd
Priority date: 2012-03-29
Filing date: 2012-03-29
Publication date: 2013-02-13
Anticipated expiration: 2022-03-29

Abstract

The utility model provides a die-casting die which comprises a lower die. The lower die is provided with a sunken part, and a protruding columnar part is formed on the sunken part. The die-casting die further comprises a salt core which is sleeved on the protruding columnar part. The salt core is provided with an inner wall and an outer wall, wherein the inner wall is matched with the columnar part in shape, and the outer wall is matched with a cavity of a workpiece to be die-cast in shape. The outline of the outer wall of the salt core is provided with at least one inward concave part. According to the die-casting method and the die-casting die, the salt core is arranged, and the cavity of the workpiece to be die-cast is formed through the shape of the salt core. After the workpiece is formed, the salt core is flushed with water or placed in the water to be soaked so that the purpose of removing the salt core is achieved. Compared with the prior art, the die-casting die solves the problem that products with complex cavities are difficult to pull out.

Description

Die casting

Technical field

The utility model relates to the forming materials technology, relates in particular to a kind of die casting.

Background technology

Compression casting is called for short die casting, is that a kind of to pour molten alloy liquid the pressure of die casting into indoor, with the die cavity of high speed filling mould, and makes aluminium alloy form the casting method of foundry goods at Under Pressure Solidification.The main feature of die casting is high pressure and high speed, but common pressure casting method is subjected to the restriction of some product special shapes, for example product has the narrower die cavity of opening part, if adopt common pressure casting method, then core need to be set in die cavity, but after the formed product, because opening is narrow, this series products can't carry out depoling and process, so can't use common pressure casting method to carry out the moulding manufacturing.

The utility model content

The utility model provides a kind of die casting, to solve the problem that the conventional cast method is difficult to depoling in the prior art for the product of some special tectonics, improves the quality of products.

The utility model provides a kind of die casting, comprises counterdie, and wherein: described counterdie has depressed part, and described depressed part is formed with the cylindrical portion of projection; Described die casting also comprises the salt core, described salt core retainer plate is located on the cylindrical portion of described projection, described salt core has the inwall that the shape with described cylindrical portion is complementary and the outer wall that is complementary with the cavity shape for the treatment of the die casting workpiece, the middle part of the outer wall profile of described salt core and/or have at least one recess near the bottom of depressed part bottom surface.

Aforesaid die casting, wherein: described cylindrical portion is that up-narrow and down-wide round table-like or described cylindrical portion is cylindric.

Aforesaid die casting, wherein: the upper surface of described cylindrical portion is lower than described counterdie and removes described depressed part with the upper surface of exterior domain.

The die casting that the utility model provides is by arranging the salt core, shape according to the salt core forms the die cavity for the treatment of the die casting workpiece, behind Workpiece shaping, put into the purpose that the lysate immersion realizes removing the salt core with lysate flushing salt core or with the salt core, compared with prior art, solved the depoling difficulty of the product of die cavity complexity.The product geometric accuracy that the pressure casting method that employing the utility model embodiment provides and die casting produce is high, and mechanical performance and surface roughness are all better.

Description of drawings

The product figure of the die casting that is applicable to the utility model embodiment and provides is provided Fig. 1.

The structure top view of counterdie in the die casting that Fig. 2 provides for the utility model embodiment.

Fig. 3 is that the A-A of Fig. 2 is to cutaway view.

The structure top view of salt core in the die casting that Fig. 4 provides for the utility model embodiment.

Fig. 5 is that the B-B of Fig. 4 is to cutaway view.

The die casting installation diagram that Fig. 6 provides for the utility model embodiment.

The pressure casting method flow chart that Fig. 7 provides for the utility model embodiment.

The specific embodiment

The product figure of the die casting that is applicable to the utility model embodiment and provides is provided Fig. 1.The structure top view of counterdie in the die casting that Fig. 2 provides for the utility model embodiment, Fig. 3 be the A-A of Fig. 2 to cutaway view, the structure top view of salt core in the die casting that Fig. 4 provides for the utility model embodiment, Fig. 5 are that the B-B of Fig. 4 is to cutaway view.The utility model embodiment provides a kind of die casting, is applicable to the product of die-casting die cavity shape complexity, and as shown in Figure 2, the die casting workpiece 1 for the treatment of of this product has the die cavity 11 of hollow, and the inside of die cavity 11 is irregular tubular, on the barrel with the projection 13.These die cavity 11 tops have opening 12, and the internal diameter size of opening 12 is less than the internal diameter size of tubular die cavity 11.So utilize common pressure casting method, can't carry out conventional depoling and process, this die casting comprises counterdie, and shown in Fig. 2 and 3, wherein, counterdie 2 has depressed part 21, and this depressed part 21 is formed with the cylindrical portion 22 of projection; This die casting also comprises salt core 3, and as shown in Figure 4 and Figure 5, this salt core 3 is set on the above-mentioned cylindrical portion 22, and salt core 3 has the inwall 31 that is complementary with cylindrical portion 22 and the outer wall 32 that is complementary with die cavity 11 shapes for the treatment of die casting workpiece 1; The bottom of the middle part of the profile of this outer wall 32 and/or close depressed part bottom surface has at least one recess 33, thereby can form the projection 13 on the barrel for the treatment of the die casting workpiece, and its shape is determined according to the shape of specifically treating the die casting workpiece.

The die casting installation diagram that Fig. 6 provides for the utility model embodiment, before carrying out die casting work, first with salt core 3 fixed covers on the cylindrical portion 22 on the counterdie 2, because counterdie 2 and salt core 3 will be considered the matching relationship between the two in Design and manufacturing process, after so salt core 3 fixing will satisfy patrix and counterdie matched moulds, salt core 3 can be fixed on the counterdie 2 accurately, to guarantee in press casting procedure simultaneously, dislocation or mobile and distortion can not occur in salt core 3, thus the precision of guarantee product size.After die casting finishes, from die casting, take out the workpiece of cooling forming and put into lysate, after salt core 3 dissolved, workpiece that can die casting is good took out.

For workpiece is taken out from die casting together with salt core 3, above-mentioned cylindrical portion 22 can be set for up-narrow and down-wide round table-like or cylindric.

Preferably, the upper surface that cylindrical portion 22 is set is lower than counterdie 2 and removes depressed part 21 with the upper surface of exterior domain, can reserve certain space behind the upper and lower mould matched moulds, is used for the bottom wall that die-cast product is treated in moulding.

The die casting that the utility model embodiment provides is by being fixedly installed the salt core at counterdie, after die casting finishes, workpiece and salt core are together extracted, dissolve the salt core with lysate again, can obtain corresponding product, compared with prior art, solve the product depoling hard problem of cavity structure complexity, also improved dimensional accuracy and the surface quality of product simultaneously.

The pressure casting method flow chart that Fig. 7 provides for the utility model embodiment, the utility model embodiment provides a kind of pressure casting method, and wherein, the method comprises the steps:

Step 710, form and the salt core for the treatment of that die casting workpiece cavity shape is complementary the middle part of this salt outer core profile and/or have at least one recess near the bottom of depressed part bottom surface;

Step 720, the salt core retainer plate is located on the cylindrical portion in the die casting bed die depressed part, the salt core is fixed;

Step 730, treating behind the matched moulds are pressed into molten metal in the die casting workpiece cavity;

Step 740, the workpiece behind the die cast is put into salt core lysate, after the salt core dissolves, take out workpiece.

Select the rock salt of high-quality, according to the cavity shape for the treatment of the die casting workpiece, form the salt core that is complementary with this workpiece cavity shape; Salt core after making need have the linear expansion coefficient that is complementary with the workpiece material, and has enough intensity, to bear the molten metal impulsive force, to bear in high temperature and the use procedure clamping and fixing institute's externally applied forces; Afterwards the salt core is placed on the cylindrical portion in the die casting die cavity, this salt core is fixed; Behind die cast, the workpiece after the moulding is put into lysate, lysate can be selected normal-temperature water, dissolves through 10 to 120 seconds wash to the salt core, and workpiece cavity can take out workpiece without residue from water, and whole press casting procedure is finished.

The pressure casting method that the utility model embodiment provides is by arranging the salt core, shape by the salt core forms the die cavity for the treatment of the die casting workpiece, behind Workpiece shaping, water washes the salt core or the salt core is put into water soak the purpose that realizes removing the salt core, compared with prior art, solved the depoling difficulty of the product of die cavity complexity.The product geometric accuracy that the pressure casting method that adopts the utility model embodiment to provide produces is high, and mechanical performance and surface roughness are all better.

Further, before the workpiece behind the die cast was put into water, the method also comprised:

From die casting, the workpiece of cooling forming is taken out jointly together with described salt core.Because just in the workpiece of cooling forming, core also is fixed in the die cavity of workpiece, when loosing core, workpiece and salt core are together taken out, water washes out this salt core again, thereby obtains the blank of product, again according to the design requirement of product, carry out the post processing of product, comprise machined, polishing, polish, change into and application etc.

It should be noted that at last: above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although with reference to previous embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of each embodiment technical scheme of the utility model.

Claims

1. a die casting comprises counterdie, it is characterized in that: described counterdie has depressed part, and described depressed part is formed with the cylindrical portion of projection; Described die casting also comprises the salt core, described salt core retainer plate is located on the cylindrical portion of described projection, described salt core has the inwall that the shape with described cylindrical portion is complementary and the outer wall that is complementary with the cavity shape for the treatment of the die casting workpiece, the middle part of described salt outer core profile and/or have at least one recess near the bottom of depressed part bottom surface.

2. die casting according to claim 1, it is characterized in that: described cylindrical portion is that up-narrow and down-wide round table-like or described cylindrical portion is cylindric.

3. die casting according to claim 1 and 2, it is characterized in that: the upper surface of described cylindrical portion is lower than described counterdie and removes described depressed part with the upper surface of exterior domain.