CN2189991Y

CN2189991Y - Sylinder extruding mould

Info

Publication number: CN2189991Y
Application number: CN 93225117
Authority: CN
Inventors: 李卫平; 李琼
Original assignee: SHANGHAI HIGH-PRESSURE CONTAINERS FACTORY
Current assignee: SHANGHAI HIGH-PRESSURE CONTAINERS FACTORY
Priority date: 1993-02-01
Filing date: 1993-02-01
Publication date: 1995-02-22
Anticipated expiration: 2003-02-01

Abstract

The utility model relates to a cylindrical body backward extruding mould, comprising an extruding cylinder and a dummy block. The working port of the mould boring of the extruding cylinder is cylindrical; the dummy block is arranged at the lower part of the extruding cylinder; a flow promoting corner and the dummy block are integral; the flow promoting corner can in the shape of a curved surface or a plane or a conical surface. The flow promoting corner and the dummy block are integral; once damaged, the utility model can be conveniently taken out to be exchanged or repaired; therefore, the extruding cylinder needs not to be discarded.

Description

Sylinder extruding mould

The utility model belongs to a kind of backward extruding die of low-alloy steel moulding, particularly a kind of backward extruding die that is used for seamless shell and the moulding of seamless gas cylinder bottle base of being used for.

The moulding of steel seamless cylindrical shell and seamless gas cylinder bottle base generally is punching and dials and stretch, punch process is to adopt backward extrusion, make metal under external force, flow into the annular gap of extruding rod and recipient, form tubular wall portion, decline along with the extruding rod, deformable metal is constantly clamp-oned the bottom of tubular wall portion, and the tube wall that has been shaped is moved as rigidity from bottom to top, at this moment in short stream angular deformation amount maximum, frictional force is also maximum, makes the damage of mould also maximum.The at present short stream angle part 3 of backward extruding die Fig. 5 ' be and recipient 1 ' be the dummy block 2 of one ' only play the liftout effect, owing to protect the very easily damage of place, stream angle, and recipient dismounting trouble causes mould to scrap, cost rises, work efficiency decline.

The purpose of this utility model is exactly in order to solve the defective of above-mentioned existing indirect-extrusion mould, to provide a kind of short stream angle and recipient separable, in case damage the novel trans extrusion die that need not scrap recipient.

Formation of the present utility model comprises recipient and dummy block, and it is bar shape that recipient mould borer is made part, and dummy block is positioned at the bottom of recipient, and short stream angle and dummy block are one, and short stream angle can be curved surface or the plane or the conical surface.

Further specify embodiment of the present utility model below in conjunction with accompanying drawing:

Fig. 1 is a structural profile schematic diagram of the present utility model;

Fig. 2 is that the short stream of the utility model angle is the dummy block schematic diagram of the conical surface;

Fig. 3 is that the short stream of the utility model angle is the dummy block schematic diagram on plane;

Fig. 4 is that the short stream of the utility model angle is the dummy block schematic diagram of curved surface.

Fig. 5 is the simplified backward extruding die structure of prior art.

1 is recipient among the figure, and 2 is dummy block, and 3 are short stream angle part.

The specification requirement of shaped object and internal diameter size are made bar shape with the working portion of recipient as required, one is made with dummy block 2 in the short stream angle part 3 of wearing and tearing easily, short stream angle can be the conical surface shape as Fig. 2 as requested, also can be as the plane of Fig. 3 or as Fig. 4 curved surface shape, dummy block is positioned at the bottom of recipient, not only play liftout effect, also bear maximum deformation force, reduce the loss of recipient into article shaped.

The utility model has the advantages that and to urge to flow the angle and dummy block is made one, in case short stream angle is damaged as long as dummy block is taken out, repaired or transfer damage, time-consuming transposing recipient need not to require great effort, both save a large amount of mold materials, reduced cost, improved again work efficiency.

Claims

1, a kind of cylindrical shell backward extruding die comprises recipient and dummy block, it is characterized in that it is bar shape that recipient mould borer is made part, and dummy block is positioned at the bottom of recipient, and short stream angle and dummy block are one.

2, cylindrical shell backward extruding die according to claim 1 is characterized in that the short stream angle with the dummy block one can be curved surface or the plane or the conical surface.