CN105478512A

CN105478512A - Extrusion die

Info

Publication number: CN105478512A
Application number: CN201510999272.1A
Authority: CN
Inventors: 姚延毅
Original assignee: Qinghai Mold Manufacturing Technology Co Ltd
Current assignee: Qinghai Mold Manufacturing Technology Co Ltd
Priority date: 2015-12-28
Filing date: 2015-12-28
Publication date: 2016-04-13

Abstract

The invention discloses an extrusion die which comprises a die face and a die cushion. The extrusion die is characterized in that the die cushion comprises a die hole, a die hole acting layer and a cooling interlayer; a die work belt, a gas guiding groove and a gas inlet are formed in the die face; and inert gas enters the extrusion die from the gas inlet of the die face and flows into the die work belt from the gas guiding groove. The extrusion die can effectively avoid generation of alumina particles, and the die loss is reduced while the product yield is increased.

Description

A kind of extrusion die

Technical field

The present invention relates to machining manufacturing technology field, particularly relate to a kind of extrusion die.

Background technology

In the prior art, the extrusion die of aluminium section bar is generally made up of die face and die-cushion two parts, usually assembled in the mode of surface laminating and by fastening thus form a whole set of extrusion die between die face and die-cushion.Usually, extrusion die need be heated to about 480 degree and just start extruding, and aluminium alloy is at high temperature shaping by die working length.In the process, on the one hand, metallic aluminium can at high temperature with oxygen generation oxidation reaction, produce particulate oxidation thing at Surface of profile, this particulate oxidation thing have impact on the quality of section bar; On the other hand, mould is produced at higher operating temperatures, and heat distributes slowly, and radiating effect is poor, uses the thermal stress produced to be die forming part surface crack and even the overall main cause ftractureed for a long time, thus causes scrapping of mould.

Patent of invention CN201510191067 provides a kind of employing and leads to inert gas, and especially nitrogen avoids the extrusion die of alumina particle produce life.The position of this mould ventilation protection at approach place, and have passed die working length when high-temperature metal aluminium arrives herein, avoid the effect producing alumina particle undesirable, and this mould radiating effect is not good, poor durability.

Summary of the invention

For prior art produced problem, the present invention proposes following technical scheme:

A kind of extrusion die, comprise die face 2 and die-cushion 1, it is characterized in that, described die-cushion 1 comprises nib 11, nib active layer 12 and cooling sandwith layer 13; Die working length 23, air slot 22 and air admission hole 21 is provided with in described die face 2; Inert gas enters from the air admission hole 21 of described die face 2 and flows into die working length 23 by described air slot 22.

Described die working length 23 and nib 11 are circular port.

Described cooling sandwith layer 13 arranges water inlet pipe 14 and outlet pipe 15; Described water inlet pipe 14 is positioned at bottom die-cushion 1, and outlet pipe 15 is positioned at die-cushion 1 top; The reverse setting parallel with outlet pipe 15 of described water inlet pipe 14.

Described air admission hole 21 and air slot 22 and be positioned at the front portion of die face 2.

Described air slot 22 is planar structure, and enters interruption-forming loop configuration around die working length 23.

Described air admission hole 21 is symmetrical two, and is connected with air slot 22, thus makes inert gas enter from air admission hole 21 air guide channel that air slot 22 forms extrusion die inside.

Described die-cushion 1 is also provided with four equally distributed hole clippings 16; Described die face 2 is provided with four equally distributed metal buckles 24, described die face 2 is assembled fastening with described die-cushion 1 in the mode fitted in surface; Described metal buckle 24 pierces die face 2.

Described inert gas is argon gas.

Compared with prior art, the present invention has following beneficial effect:

1, cooling sandwith layer is set, and condensation flow to metal flow to contrary, condensation is faster, better effects if, make each working region heat radiation of die working length profile of tooth die cavity evenly, avoid causing product to occur pendulum tooth, distortion or fracture, greatly improve product yields.

2, adopt the design of buckle and hole clipping, combine than independent locating hole stronger, make described die face and described die-cushion assemble more fastening in the mode fitted in surface.

3, the front portion of air admission hole and air slot die face even, is namely just protected with inert gas, compares and passed at nib place by protection gas after metal enters die working length, greatly reduces the probability that alumina particle produces.

4, arrange plane air slot, compare line type air slot and make the more stable press-in contact surface continued of inert gas, starvation, protected effect promotes greatly.

5, adopt argon gas to protect as inert gas, compare nitrogen, argon gas is heavier, closely can cover contact surface, and " extruded " by oxygen molecule, protected effect is better.

Accompanying drawing explanation

Fig. 1 is the plan structure schematic diagram of die-cushion in the present invention.

Fig. 2 is the plan structure schematic diagram of die face in the present invention.

Fig. 3 is the side-looking structural representation of die face in the present invention.

Fig. 4 is the side-looking structural representation of die-cushion in the present invention.

Fig. 5 is structure of extrusion schematic diagram in the present invention.

In figure, die-cushion 1, die face 2, nib 11, nib active layer 12, cooling sandwith layer 13, water inlet pipe 14, outlet pipe 15, hole clipping 16, air admission hole 21, air slot 22, die working length 23 and metal buckle 24.

Detailed description of the invention

Below in conjunction with specific embodiment, the present invention is described in further detail.

Embodiment 1

The technical program is further illustrated as follows below in conjunction with accompanying drawing:

As Figure 1-5, the invention discloses a kind of extrusion die, a kind of extrusion die, comprise die face 2 and die-cushion 1, it is characterized in that, described die-cushion 1 comprises nib 11, nib active layer 12 and cooling sandwith layer 13; Die working length 23, air slot 22 and air admission hole 21 is provided with in described die face 2; Inert gas enters from the air admission hole 21 of described die face 2 and flows into die working length 23 by described air slot 22; Described die working length 23 and nib 11 are circular port; Described cooling sandwith layer 13 arranges water inlet pipe 14 and outlet pipe 15; Described water inlet pipe 14 is positioned at bottom die-cushion 1, and outlet pipe 15 is positioned at die-cushion 1 top; The reverse setting parallel with outlet pipe 15 of described water inlet pipe 14; Described air admission hole 21 and air slot 22 and be positioned at the front portion of die face 2; Described air slot 22 is planar structure, and enters interruption-forming loop configuration around die working length 23; Described air admission hole 21 is symmetrical two, and is connected with air slot 22, thus makes inert gas enter from air admission hole 21 air guide channel that air slot 22 forms extrusion die inside; Described die-cushion 1 is also provided with four equally distributed hole clippings 16; Described die face 2 is provided with four equally distributed metal buckles 24, described die face 2 is assembled fastening with described die-cushion 1 in the mode fitted in surface; Described metal buckle 24 pierces die face 2.

Embodiment 2

Select commercially available similar extrusion die, carry out contrast test with the extrusion die in the extrusion die of the embodiment of the present invention 1 and CN201510191067 embodiment.

1, serviceability test: respectively get 500 moulds, carries out contrast in 1000 hours.

2, product yields test: respectively get 20 moulds, carries out 1000 production contrasts

Visible, extrusion die of the present invention effectively can avoid the generation of alumina particle, while improving product yields, decreases mould loss.

Claims

1. an extrusion die, comprises die face (2) and die-cushion (1), it is characterized in that, described die-cushion (1) comprises nib (11), nib active layer (12) and cooling sandwith layer (13); Die working length (23), air slot (22) and air admission hole (21) is provided with in described die face (2); Inert gas enters from the air admission hole (21) of described die face (2) and flows into die working length (23) by described air slot (22), and described die-cushion (1) is also provided with four equally distributed hole clippings (16); Described die face (2) is provided with four equally distributed metal buckles (24), described die face (2) and described die-cushion (1) are assembled fastening in the mode fitted in surface; Described metal buckle (24) pierces die face (2).

2. a kind of extrusion die as claimed in claim 1, is characterized in that, described die working length (23) and nib (11) are circular port.

3. a kind of extrusion die as claimed in claim 1, is characterized in that, described cooling sandwith layer (13) arranges water inlet pipe (14) and outlet pipe (15); Described water inlet pipe (14) is positioned at die-cushion (1) bottom, and outlet pipe (15) is positioned at die-cushion (1) top; Described water inlet pipe (14) reverse setting parallel with outlet pipe (15).

4. a kind of extrusion die as claimed in claim 1, is characterized in that, described air admission hole (21) and air slot (22) and be positioned at the front portion of die face (2).

5. a kind of extrusion die as claimed in claim 1, is characterized in that, described air slot (22) is planar structure, and enters interruption-forming loop configuration around die working length (23).

6. a kind of extrusion die as claimed in claim 1, it is characterized in that, described air admission hole (21) is symmetrical two, and be connected with air slot (22), thus inert gas is made to enter from air admission hole (21) air guide channel that air slot (22) forms extrusion die inside.

7. a kind of extrusion die as claimed in claim 1, is characterized in that, described inert gas is argon gas.