CN105414236A

CN105414236A - Magnesium alloy sectional material extrusion die cooling structure

Info

Publication number: CN105414236A
Application number: CN201510775997.2A
Authority: CN
Inventors: 李江海; 吴稀勇; 陈利红
Original assignee: TIANJIN DONGYI MAGNESIUM PRODUCTS CO Ltd
Current assignee: TIANJIN DONGYI MAGNESIUM PRODUCTS CO Ltd
Priority date: 2015-11-12
Filing date: 2015-11-12
Publication date: 2016-03-23

Abstract

The invention provides a magnesium alloy sectional material extrusion die cooling structure. The structure comprises an upper die and a lower die. A magnesium alloy blank is extruded through a gap between the dies under the action of thrust of an extruder, and the formed shape of the magnesium alloy blank is consistent to the outlet shape of the die. The dies are extrusion dies capable of being cooled circularly. According to the circularly cooled extrusion die structure, a strip-loop-shaped groove with a sunk table is formed in the center of the low die; two through holes are formed in the bottom of the groove at the same time and communicated with a coolant inlet and a coolant outlet respectively through coolant connecting openings; an annular pressing cap is inlaid in the sunk table of the groove so as to close an annular band of the groove. The magnesium alloy sectional material extrusion die cooling structure has the beneficial effects that by means of the improvement of the magnesium alloy sectional material extrusion die cooling structure, the capacity for extruding high-strength hard alloy products is increased to be 300 kilogram; products of one ton need to be extruded for 48 hours before but now can be extruded for 34 hours continuously, and the per ton cost is reduced by 1820 yuan when the production power consumption is 130 yuan per hour.

Description

The structure of the mould cooling of extrusion magnesium alloy section bar

Technical field

The present invention relates to a kind of structure of mould cooling of extrusion magnesium alloy section bar.

Background technology

Current magnesium alloy profiles extruding production capacity bottleneck is after extrusion temperature is too high, product phenomenon of rupture is just there will be after speed is greater than 0.8mm/s, thus restriction extrusion speed cannot improve, and directly causes that production efficiency is low, unit cost is high, cannot meet customer requirement.Thin-walled small section per tour production capacity only about 250 kilograms of current industry production, for a change this present situation, promoting magnesium alloy profiles production efficiency, is a technical barrier of being eager to capture.

Summary of the invention

For deficiency structural in prior art, the object of this invention is to provide a kind of structure of mould cooling of extrusion magnesium alloy section bar, be beneficial to solve mould high temperature and the product fracture that causes cannot the bottleneck problem of high-speed production, and improve production capacity, reduce costs, realize batch production.

For achieving the above object, the technical solution used in the present invention is to provide a kind of structure of mould cooling of extrusion magnesium alloy section bar, this structure includes upper die and lower die two parts, magnesium alloy blank, by being extruded by the gap between mould under extruder thrust, forms the shape consistent with mould outlet shape; Wherein: described mould is the extrusion die of cooling capable of circulation, the structure of extrusion of described cooling capable of circulation is the groove being provided with an endless belt heavy stand in the center of described counterdie, process two through holes at bottom portion of groove simultaneously, and be communicated with refrigerant exit with refrigerant import respectively by refrigerant connector, be inlaid with annular gland in the heavy stand of groove, the endless belt of groove is closed.

Effect of the present invention is that the structure of being lowered the temperature by the mould of extrusion magnesium alloy section bar is improved, the production capacity of extruding high strength cemented carbide goods brings up to 300 kilograms, product needed originally per ton extrudes 48 hours, and sustainable 34 hours now, by production power consumption per hour 130 yuan, ton cost reduces by 1820 yuan.

Accompanying drawing explanation

Fig. 1 is profile extrusion principle schematic of the present invention;

Fig. 2 is mould structure top view of the present invention;

Fig. 3 is mould structure side view of the present invention;

Fig. 4 is whole system schematic diagram of the present invention.

In figure:

1, patrix 2, counterdie 3, through hole 3', refrigerant connector 4, annular gland

5, groove 6, extruded product 7, material inlet 8, refrigerant inlet

9, refrigerant exit 10, water-filled radiator 11, refrigerant equipment 12, pressure ram 13, blank

14, recipient inner chamber 15, recipient 16, refrigerant inlet switch 17 refrigerant exit switch

Detailed description of the invention

By reference to the accompanying drawings the structure that the mould of extrusion magnesium alloy section bar of the present invention is lowered the temperature is illustrated.

The structural design thought of the mould cooling of extrusion magnesium alloy section bar of the present invention designs and produces a whole set of cooling system, dies cavity is processed into cavity, and by tubes connection refrigerant, mold core formed product position and work strip are lowered the temperature, reach temperature-controllable in material forming process, realize the quick output of magnesium alloy profiles product.

The structure of the mould cooling of extrusion magnesium alloy section bar of the present invention is that this structure includes upper die and lower die two parts, and magnesium alloy blank, by being extruded by the gap between mould under extruder thrust, forms the shape consistent with mould outlet shape; Described mould is the extrusion die of cooling capable of circulation, the structure of extrusion of described cooling capable of circulation is the groove 5 being provided with an endless belt heavy stand in the center of described counterdie 2, bottom groove 5, process two through holes 3 simultaneously, and be communicated with refrigerant exit 9 with refrigerant import 8 respectively by refrigerant connector 3', be inlaid with annular gland 4 in the heavy stand of groove 5, the endless belt of groove 5 is closed.

As shown in Figure 1, extrusion principle, blank enters mould by tap hole, under high pressure by the shaping outflow of mold shape.Raw material is entered dies cavity arrival mould molding region by material inlet 7 and is extruded by the gap between mould under the promotion of pressure, forms the extruded product 6 consistent with mould outlet shape.

As shown in Figure 2,3, 4, the processing and fabricating of mould: process the groove 5 of an endless belt heavy stand during processing mold in the position of counterdie 2, process two through holes 3 be used for connecting refrigerant in conjunction with mould and enter and flow out bottom annular groove; Finally annular gland 4 is mounted in the heavy stand of groove 5 and circular passage is closed, keeps apart with raw material.Make cavity structure at mould molding position, take away uniform temperature by refrigerant, make product reduce hot tearing.

Extrusion die patrix 1, counterdie 2 are connected, fastening, extrusion die is added mould stove and is warmed up to 450 degree, be incubated 2 hours.Starting extruder is assemblied in mold base of extruder by extrusion die, adjustment extrusion die center and pressure ram 12, recipient 15 central alignment, adds magnesium alloy blank 13 and starts extruding.Annular gland 4 and mould interference fit, annular gland 4 sealing process, prevent alloy from entering, and refrigerant is by two circular holes on refrigerant connector 3' connecting mold.

When starting to extrude, pressure ram 12 promotes blank 13 and enters recipient cavity 14, when blank cannot pass through with surrounding in the wings, enters mould cavity, extruded product 6 after patrix 1, the distortion of counterdie 2 magnesium alloy blank 13.

Normal production status is entered in extruding, when pressure ram fltting speed is 0.8mm/s, now slowly open refrigerant inlet switch 16, refrigerant exit switch 17, make refrigerant by import 8, enter mold groove 5, flow back into refrigerant equipment 11 by refrigerant exit 9 again, this cyclic process constantly takes away mold heat, and mould molding spot temperature is reduced, thus the decrepitation avoiding product to cause in forming process, reach and improve extrusion speed, improve the object that reduces costs of production capacity.

Consider very high by mould reflux gas temperature, need on loop, increase by one group of cooling system 10, after making temperature be down to normal temperature, flow back to refrigerant equipment 11 again.Because mold temperature is higher, refrigerant loop temperature also increases thereupon, and needing increases water cooling.

Claims

1. a structure for the mould cooling of extrusion magnesium alloy section bar, this structure includes upper die and lower die two parts, and magnesium alloy blank, by being extruded by the gap between mould under extruder thrust, forms the shape consistent with mould outlet shape; It is characterized in that: described mould is the extrusion die of cooling capable of circulation, the structure of extrusion of described cooling capable of circulation is the groove (5) being provided with an endless belt heavy stand in the center of described counterdie (2), simultaneously groove (5) bottom processing two through holes (3), and be (3') communicated with refrigerant exit (9) with refrigerant import (8) respectively by refrigerant connector, be inlaid with annular gland (4) in the heavy stand of groove (5), the endless belt of groove (5) is closed.