CN1271638A

CN1271638A - Smelting-ejecting technology for manufacturing metallic mould

Info

Publication number: CN1271638A
Application number: CN 99116449
Authority: CN
Inventors: 张海鸥; 王桂兰
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-04-27
Filing date: 1999-04-27
Publication date: 2000-11-01
Anticipated expiration: 2019-04-27
Also published as: CN1093452C

Abstract

A smelting-ejecting technology for manufacturing metal die set includes such steps as copying silicon rubber mould on the basis of raw material prototype, quick prototype or product prototype, making ceramic mould by copying, ejecting the molten carbide alloy or antiwear metal to its surface, reinforcing it with cast alloy and demoulding to obtain the metal die set. Its advantages are high speed, low cost, and high accuracy and durability.

Description

Smelting-ejecting technology for manufacturing metallic mould

The present invention is the metal die precise manufacture method that injection molded or metal forming are used.

The method that metal die is made in meltallizing that is thermal spraying has fast, characteristics cheaply, and U.S. BADGER PATTERN company 1997 is at PR﹠amp; The material that is distributed in the M international conference provides a kind of meltallizing to make the method for metal die, earlier duplicate the silicon rubber former by prototype, adopt resin material to turn over system again by the meltallizing prototype, formed the meltallizing layer by low-melting-point metals such as meltallizing prototype surface meltallizing zinc, with materials such as resin or ceramic powders to the reinforcement of meltallizing layer, wherein also can mix metal dust, remove at last by the meltallizing prototype, promptly obtain metal die.Because materials such as employing resin are made by the meltallizing prototype, the hear resistance deficiency, can only be at low-melting-point metals such as its surperficial meltallizing zinc, cause wearing no resistance of mould, owing to adopt materials reinforcings such as resin or ceramic powders, although add metal dust, the intensity of mould and heat conductivity are still lower, the shrinkage of meltallizing metal material is big during repairing mould, is difficult to obtain the high accuracy meltallizing layer of desired thickness.Therefore, existing meltallizing molding method still can only be made the low precision mould that is used for small lot batch manufacture.

The purpose of this invention is to provide a kind of both kept existing meltallizing molding method fast, advantage of low cost, the method that can make high-quality durable metal mould again for this reason, changes by the material of meltallizing prototype, changes the meltallizing layer material thereupon.Another object of the present invention is to improve the intensity and the heat conductivity of mould, and corresponding for this reason change is to the material of meltallizing layer reinforcement.

Constitute the molten tool smelting-ejecting technology for manufacturing of metal die of the present invention, successively preface for directly turn over by natural material prototype, rapid prototyping, product prototype system by the meltallizing prototype or duplicate silicon rubber mould, again turn over system by the meltallizing prototype, is being formed the meltallizing layer by meltallizing prototype surface, the reinforcement of meltallizing layer, removal is being obtained metal die by the meltallizing prototype, it is characterized by:

(1) turns over by the meltallizing prototype or in the silicon rubber former with the material system of directly turning over of ceramic main and make by the meltallizing prototype;

(2) formed the meltallizing layer by meltallizing prototype surface meltallizing carbide alloy or antifriction metal (AFM).

For improving the intensity and the heat conductivity of mould, can adopt casting alloy to the reinforcement of meltallizing layer.

For further improving heat conductivity, can give in the reinforcement part and put cooling pipe, pour into a mould casting alloy again.

In the above-mentioned smelting-ejecting technology for manufacturing metallic mould, the ceramic material that the system of turning over is used by the meltallizing prototype can be an alundum (Al, also can be silica.The material that forms the meltallizing layer can be diamondite, also can be stainless steel or nickel alloy.Supporting material can adopt bismuth---ashbury metal or kirsite.

Method provided by the present invention because ceramic mould is indeformable substantially by the meltallizing prototype, has guaranteed mould and die accuracy; Adopt materials such as carbide alloy or stainless steel to form the meltallizing layer and guarantee the wear-resisting and intensity of die surface; Adopt the casting alloy reinforcement to guarantee the intensity of mould and good heat conductivity.At 1000kg/cm ²Injection molded experimental result under the pressure shows: mould is indeformable, surperficial meltallizing layer do not have peel off, surperficial natural decoration copied on the product surface full and accurately.High volume production process when therefore, the mould made of this method can be used for injection molded or metal forming.

The be with natural decoration diamondite mould of Figure 1A for making of method of the present invention,

The product of Figure 1B for being shaped with above-mentioned mold injection.

Fig. 2 A is a kind of light appearance rapid prototyping of phone,

The stainless steel mould of Fig. 2 B for making of the inventive method according to above-mentioned rapid prototyping.

Embodiment 1

(1) makes wooden model, stick natural leather on its surface and make the prototype of surface with natural decoration.Prototype is placed in the cast frame, pour proper amount of silicon rubber into, treat that silicon rubber solidifies the back and just can obtain silicon rubber mould.The powder such as alundum (Al, bond etc. that to make ceramic mould then mix, and pour in the silicon rubber mould, and curing and demolding can obtain ceramic mould by the meltallizing prototype after the drying heating.

(2) ceramic mould by meltallizing original shape surface on meltallizing diamondite powder, form the diamondite meltallizing layer of about 0.2～0.3mm.

(3) having adopted bismuth-ashbury metal casts the reinforcement of meltallizing layer.Can cooling pipe be set in the reinforcement part in order to improve cooling effect.

(4) after destroy being separated by the meltallizing prototype, ceramic mould just can obtain the diamondite mould of the surface shown in Figure 1A with natural decoration.By Figure 1B as seen, the natural decoration on prototype surface copies on the product surface by mould when injection molded full and accurately.Subsequent fine processing can be undertaken by methods such as general machining.Embodiment 2:

(1) the portable phone box rapid prototyping shown in the construction drawing 2A, prototype is placed in the cast frame, and the powder such as silica, bond etc. that will make ceramic mould then mix, and pour in the silicon rubber mould, curing and demolding, drying heating back just can obtain ceramic mould by the meltallizing prototype.

(2) ceramic mould by meltallizing prototype surface on meltallizing stainless steel meltallizing powder, form the stainless steel meltallizing layer of about 0.5mm.

(3) adopt kirsite to the reinforcement of meltallizing layer by the method identical with embodiment 1.

(4) ceramic mould is destroyed separation by the meltallizing prototype, and will just obtain the ganoid Telephone connector stainless steel mould shown in Fig. 2 B after the surface grinding.Its surface average roughness Ra is 0.2 μ m, reaches the requirement to the injection mould surface accuracy.Embodiment 3:

(1) makes pottery by the meltallizing prototype by the method identical with embodiment 2.

(2) meltallizing nickel alloy meltallizing powder on by meltallizing prototype surface is split into the meltallizing layer about 1mm.

(3) adopt the composite material of resin and aluminium powder to the reinforcement of meltallizing layer.

(4) will just can be obtained mould after the separation of meltallizing prototype destruction.

Claims

1. smelting-ejecting technology for manufacturing metallic mould, successively preface for directly turn over by prototype system by the meltallizing prototype or duplicate silicon rubber mould, again turn over system by the meltallizing prototype, is being formed the meltallizing layer by meltallizing prototype surface, the reinforcement of meltallizing layer, removal is being obtained metal die by the meltallizing prototype, it is characterized by:

(1) directly turns over system by the meltallizing prototype or in silicon rubber mould, turn over and make with the material of ceramic main by the meltallizing prototype;

2. smelting-ejecting technology for manufacturing metallic mould as claimed in claim 1 is characterized by and adopts casting alloy to the reinforcement of meltallizing layer.

3. smelting-ejecting technology for manufacturing metallic mould as claimed in claim 2 is characterized by reinforcement and partly gives and put cooling pipe, pours into a mould casting alloy again.

4. as the described smelting-ejecting technology for manufacturing metallic mould of claim 1,2 or 3, it is characterized by the ceramic material that the system of turning over used by the meltallizing prototype and be alundum (Al or silica.

5. as the described smelting-ejecting technology for manufacturing metallic mould of claim 1,2 or 3, it is characterized by the material that forms the meltallizing layer is diamondite, stainless steel or nickel alloy.

6. as claim 2 or 3 described smelting-ejecting technology for manufacturing metallic mould, it is characterized by supporting material is bismuth alloy or kirsite.