CN105382236A

CN105382236A - Open type charging barrel of cold chamber die casting machine for semisolid die casting

Info

Publication number: CN105382236A
Application number: CN201510873613.0A
Authority: CN
Inventors: 张帆; 陈颂; 李大全; 和优锋; 朱强
Original assignee: Beijing General Research Institute for Non Ferrous Metals
Current assignee: Beijing General Research Institute for Non Ferrous Metals
Priority date: 2015-12-02
Filing date: 2015-12-02
Publication date: 2016-03-09

Abstract

The invention belongs to the field of die casting of non-ferrous metal and particularly relates to an open type charging barrel of a cold chamber die casting machine for semisolid die casting. The open type charging barrel of the cold chamber die casting machine for semisolid die casting is characterized in that a charging barrel body (1) is a hollow cylinder with the two ends open; the barrel wall of one end of the charging barrel body (1) is semi-open, and the barrel wall of the other end of the charging barrel body (1) is closed; round holes (3) which are evenly distributed and penetrate into the charging barrel in the axial direction are formed in the cross section of the semi-open barrel wall, and heating devices are arranged in the round holes; a flange boss (2) is arranged outside the end, provided with the closed wall, of the charging barrel body. By the adoption of the semi-open design, the requirement for radial restraint of a punch of the die casting machine is met, and a semisolid metal slurry/blank die casting technique capable of achieving the solid fraction from 1%-80% is achieved; the heat loss of semisolid metal slurry/blanks in the charging barrel is reduced by means of the heating devices, temperature and structure differences of the semisolid metal slurry/blanks caused by local temperature fall are eliminated, and the quality of parts formed in the substrate stage is guaranteed.

Description

A kind of cold-chamber die casting machine open type barrel for Semi-solid Thixo-Casting

Technical field

The invention belongs to non-ferrous metal casting forming field, particularly relate to a kind of cold-chamber die casting machine open type barrel for Semi-solid Thixo-Casting.

Background technology

Conventional liquid die casting is the barrel that a kind of metal by molten condition pours into die casting machine, under the effect of high pressure, be filled in the die cavity of compression mod with high speed, and under high pressure make molten metal cooled and solidified shaping and obtain the high benefit of foundry goods, high efficiency casting method.Semi-solid Thixo-Casting technique general principle is identical with conventional liquid die casting, but Semi-solid Thixo-Casting technique is that semi-solid metal slurry/blank is put into charging barrel of die casting machine, then carries out filling, pressurization, solidification forming.Two kinds of technique main distinctions are that to put into the metallic state of barrel different, and what conventional liquid die casting was selected is pure liquid metal, and semisolid pressure casting is selected is the semi-solid-state metal of solid-liquid admixture.The semi-solid-state metal of solid-liquid admixture especially when fraction solid is higher (fraction solid reaches more than 30%), cannot flow freely under gravity, can keep self intrinsic shape.

The barrel adopted in conventional liquid casting forming technique is cylinder closed-loop shaped, has square or circular open in its end near forcer position, and liquid metal is poured in barrel from here, completes subsequently and fills type, pressurization, solidification forming; And semi-solid-state metal cannot flow freely, can not from open-ended the pouring into of cylinder closed-loop shaped barrel, therefore this structure barrel, can not meet the production requirement of semisolid pressure casting technique.In addition, cylinder closed-loop shaped barrel does not arrange heater, semi-solid metal slurry/blank is put into wherein and between barrel and heat transfer occurs is caused local temperature to decline rapidly, semi-solid blank temperature, uneven microstructure, affect the quality of post forming part, cause cold shut, fill the casting flaws such as type is bad.

Summary of the invention

For solving the problems of the technologies described above, the invention provides a kind of cold-chamber die casting machine open type barrel for Semi-solid Thixo-Casting, it is characterized in that, comprise barrel body 1 and flange platform 2; Barrel body 1 is the hollow cylindrical tube of both ends open, the barrel of barrel body 1 one end is semi open model, the barrel of barrel body 1 other end is closed, the cross section of semi open model barrel is provided with the circular hole 3 being uniformly distributed, axially going deep into barrel inside, heater is placed in circular hole, for controlling the temperature of barrel body; The outer setting of the barrel blind end of barrel body has flange boss 2, for locating with the installation of die casting machine solid plate.

Described barrel body 1 adopts split type or monolithic construction, and the semi-open end of barrel coordinates with die casting machine punch, and the blind end of barrel body coordinates with die casting; The drum diameter of barrel blind end is mated with the cover half hole of die casting;

The quantity of described circular hole 3 according to circumstances arranges 1 to 12, and the degree of depth of circular hole 3 accounts for the 30%-99% of barrel body 1 total length.

The open section length of described semi open model barrel is mated with the length of the semi-solid metal slurry required for casting forming or blank, the central angle that the opening circular arc of barrel body 1 cross section is corresponding is 80 ° to 178 °, both ensured that semi-solid metal slurry or blank put into barrel smoothly, met again the radial location of barrel to die casting machine punch.

Beneficial effect:

(1) barrel one end adopts semi open model design, effigurate semi-solid metal slurry/the blank of tool is allowed to put into barrel, meet the radial location of barrel to die casting machine punch simultaneously, ensure the successful implementation of follow-up extrusion process, realize the casting forming technique of the semi-solid metal slurry/blank of fraction solid from 1% to 80%.

(2) barrel is provided with heater, effectively reduces the thermal loss of semi-solid metal slurry/blank in barrel, and the temperature of the semi-solid metal slurry that elimination local cooling causes or blank and histological difference, affect the quality of post forming part.

Accompanying drawing explanation

In order to make summary of the invention more easily be understood, below according to specific embodiment also by reference to the accompanying drawings, the present invention is further detailed explanation, wherein

Fig. 1 is the structure chart of the barrel that the present invention proposes;

Fig. 2 (a) ~ (c) is respectively the right view of barrel, sectional view and the top view that the present invention proposes

Reference numeral:

1-barrel body; 2-flange boss; 3-circular hole.

Specific embodiment

With reference to the accompanying drawings and the invention will be further described in conjunction with the embodiments.

The present invention is applied on cold-chamber die casting machine, and Fig. 1 is the structure chart of the barrel that the present invention proposes, and Fig. 2 (a) is right view, and Fig. 2 (b) is sectional view, and Fig. 2 (c) is top view.Semi-solid Thixo-Casting dedicated openings formula barrel described in the present embodiment, comprises barrel body 1 and flange platform 2; Barrel body 1 is the hollow cylindrical tube of both ends open, the barrel of barrel body 1 one end is semi open model, the barrel of barrel body 1 other end is closed, the outer setting of the barrel blind end of barrel body has flange boss 2, the corresponding central angle of open section circular arc is 170 °, and open section length accounts for 55% of whole barrel body 1 total length; The cross section of semi open model barrel is provided with 4 circular holes being uniformly distributed, axially going deep into barrel inside, and Circularhole diameter 15mm, the degree of depth of circular hole accounts for 85% of barrel total length, can put into 4 electrically heated rods matched with circular hole, heat for barrel.

Although listed in detail here and described preferred case study on implementation, but those skilled in the art are known, can carry out various structural adjustment and device to change when not departing from marrow of the present invention, these contents all considered to be within the scope of the claims of the present invention that claim limits.

Claims

1. for a cold-chamber die casting machine open type barrel for Semi-solid Thixo-Casting, it is characterized in that, comprise barrel body (1) and flange platform (2); The hollow cylindrical tube that barrel body (1) is both ends open, the barrel of barrel body (1) one end is semi open model, the barrel of barrel body (1) other end is closed, the cross section of semi open model barrel is provided with the circular hole (3) being uniformly distributed, axially going deep into barrel inside, heater is placed in circular hole, for controlling the temperature of barrel body; The outer setting of the barrel blind end of barrel body has flange boss (2).

2. a kind of cold-chamber die casting machine open type barrel for Semi-solid Thixo-Casting according to claim 1, it is characterized in that, described barrel body (1) adopts split type or monolithic construction, the semi-open end of barrel coordinates with die casting machine punch, and the blind end of barrel body coordinates with die casting; The drum diameter of barrel blind end is mated with the cover half hole of die casting.

3. a kind of cold-chamber die casting machine open type barrel for Semi-solid Thixo-Casting according to claim 1, it is characterized in that, the quantity of described circular hole (3) according to circumstances arranges 1 to 12, and the degree of depth of circular hole (3) accounts for the 30%-99% of barrel body (1) total length.

4. a kind of cold-chamber die casting machine open type barrel for Semi-solid Thixo-Casting according to claim 1, it is characterized in that, the open section length of described semi open model barrel is mated with the length of the semi-solid metal slurry required for casting forming or blank, and the central angle that the opening circular arc of barrel body (1) cross section is corresponding is 80 ° to 178 °.