CN105112801B

CN105112801B - Manufacturing method for nonmetal mold

Info

Publication number: CN105112801B
Application number: CN201510568421.9A
Authority: CN
Inventors: 朱余宏; 胡丽亚
Original assignee: CHUZHOU DIAMOND MOULD MANUFACTURING Co Ltd
Current assignee: CHUZHOU DIAMOND MOULD MANUFACTURING Co Ltd
Priority date: 2015-09-09
Filing date: 2015-09-09
Publication date: 2017-05-17
Anticipated expiration: 2035-09-09
Also published as: CN105112801A

Abstract

The invention relates to a preparation method for a mold and particularly provides a manufacturing method for a nonmetal mold. The manufacturing method comprises the steps of preparation of chemical components of mold steel, smelting, steel ingot pouring, electroslag remelting, forging, quenching, tempering, cutting machining to obtain the mold and surface treatment of the mold. The manufacturing method for the plastic forming mold is simple in process and capable of saving resources, and the manufactured plastic mold is resistant to abrasion, resistant to oxidation and long in service life; the quality of products produced through the mold is improved; the production cost is low.

Description

A kind of manufacture method of nonmetal mould

Technical field

The present invention relates to a kind of manufacture method of mould, and in particular to a kind of manufacture method of nonmetal mould.

Background technology

Mould, in commercial production to be molded, be blow molded, extrude, the method such as die casting or forging forming, smelting, punching press obtains The various moulds of required product and instrument.In brief, mould is the instrument for formed article, and this instrument is by various parts Constitute, different moulds are made up of different parts.It mainly realizes article by the change of institute's moulding material physical state The processing of profile.Mould species is a lot, can be divided into according to processing object and processing technique：1. the mould of metal is processed.2. process The mould of nonmetallic and powder metallurgy.Including the modern designs of plastics (such as injecting mould, compression mould and extrusion molding mould), rubber pattern and powder metallurgy Mould etc..

Due to the response of mould surface and the various physics being formed between raw material and chemical characteristic, usual mould molding Face and the contact surface being formed between raw material occur many problems, and die steel is used as the indispensable mould of manufacture plastic product Most basic composition, according to mold use purposes various characteristics are needed.The indispensable demand characteristics of die steel includes：It is uniform to cut Surface hardness, superior machinability, superior weldability, corrosion processing, specularity, fatigue strength etc..

The content of the invention

The purpose of the present invention is the defect for overcoming above-mentioned prior art, there is provided a kind of manufacture method manufacture of nonmetal mould Method, process is simple, economizes on resources, and further increases the tensile strength of mould for plastics.

A kind of manufacture method of nonmetal mould is we disclosed, is comprised the following steps：

（1）The chemical constituent of raw material mould steel is equipped with, the percentage by weight of each component is：

C 0.20%-0.40%, Cr 0.8%-1.5%, Si 0.5%-1.2%, Ni 0.2%-0.5%, Mo 0.38%-0.75%, Mn0 0.35%-0.45%, V≤0.3%, B≤0.02%, Cu≤1.0%, remaining is for Fe and not Evitable impurity；The combination of the chemical constituent can improve the tensile strength and fatigue strength of raw material mould steel, extend mould The service life of tool.

（2）Dispensing is carried out according to said components and percentage by weight, and material is put into into melting in vacuum degassing furnace, steel Liquid smelting temperature adds nitrided ferro-chromium to carry out melting at 1450-1650 DEG C, into molten steel；Nitrided ferro-chromium can replace shortage Nickel is smelted, cost-effective, enhances the corrosion resistance of mould steel.

（3）By step（2）Molten steel after middle melting pours steel ingot, and to pouring the steel ingot for building up electroslag remelting is carried out；

（4）To the steel ingot after electroslag remelting using heating stove heat, furnace temperature is not higher than 580 DEG C during steel ingot shove charge, with stove liter Temperature, and after being at least incubated 2 hours at 600 DEG C, then heat up, after reaching 1000 ± 30 DEG C, continue to be incubated at least 2 hours, afterwards Come out of the stove；Again the steel ingot to being heated is forged or rolled at 800-1000 DEG C, or is rolled after being forged, and obtains mould Tool steel；

（5）By step（4）In the mould steel that obtains quenched and temper；Hardening heat control 1100 DEG C- 1200 DEG C, temperature retention time is 0.8-1 hours, and the type of cooling is gradient cooling；Tempering adopts average tempering, and temperature control is 400 DEG C -450 DEG C, it is incubated in salt bath furnace after 2-2.5 hours and is air cooled to room temperature；

（6）According to shape of product by step（5）The mould steel for finally giving carries out machining and is finish-machined to mould shape Shape；

（7）Blasting treatment is carried out to mould integral surface：Mould is processed using high-pressure spray gun, nozzle diameter is 1.5mm, jet length die surface 220-280mm, horizontal movement velocity is 0.05m/s, and sand-blast material is quartz sand and glass Pearl compound.Good defense reaction is played in blasting treatment in the step to die surface, improves the corrosion resistance of mould, The glossiness on mould of plastics surface is ensure that, product quality is improve.

Preferably, the step（1）In each chemical composition percentage by weight be C 0.3%, Cr 1.2%, Si 0.8%th, Ni 0.3%, Mo 0.5%, Mn0 0.4%, V≤0.2%, B≤0.01%, Cu≤0.8%；

Further, the step（5）In, first mould steel is carried out to quench again after spheroidizing.

Concretely comprising the following steps for the spheroidizing, is incubated 2-4 hours, then with per hour by mould steel at 850-900 DEG C 30 DEG C of rate of cooling stove is cold, when temperature is cooled to 680 DEG C, 3-4 hours is incubated, then with 30 DEG C per hour of rate of cooling Stove is cold, temperature reach 550 DEG C after air cooling.

Beneficial effects of the present invention：The manufacture method of this nonmetal mould that the present invention is provided, process is simple, saving money Source, improves the tensile strength of mould, reduces the manufacturing cost of mould, improves the corrosion resistance of mould, it is ensured that plastics The glossiness of die surface, improves product quality.

Specific embodiment

The present invention is further elucidated with reference to specific embodiment.

Implement 1：

A kind of manufacture method of nonmetal mould is present embodiments provided, is comprised the following steps：

C 0.3%, Cr 1.2%, Si 0.8%, Ni 0.3%, Mo 0.5%, Mn0 0.4%, V≤0.2%, B≤ 0.01%, Cu≤0.8%；Remaining is Fe and inevitable impurity；

（6）According to shape of product by step（5）In the mould steel that finally gives carry out machining and be finish-machined to mould Shape；

Embodiment 2：

（5）First mould steel is carried out to quench again after spheroidizing.The spheroidizing is concretely comprised the following steps, by mould Steel is incubated 2-4 hours at 850-900 DEG C, then cold with 30 DEG C per hour of rate of cooling stove, when temperature is cooled to 680 DEG C, protects Warm 3-4 hours, it is then cold with 30 DEG C per hour of rate of cooling stove, temperature reach 550 DEG C after air cooling.

Mould steel after annealing is quenched and temper；Hardening heat is controlled at 1100 DEG C -1200 DEG C, insulation Time is 0.8-1 hours, and the type of cooling is gradient cooling；Tempering adopt average tempering, temperature control at 400 DEG C -450 DEG C, It is incubated in salt bath furnace after 2-2.5 hours and is air cooled to room temperature；

The manufacture method of this nonmetal mould that the present invention is provided, process is simple, economizes on resources, and improves the anti-of mould Tensile strength, reduces the manufacturing cost of mould, improves the corrosion resistance of mould, it is ensured that the glossiness on mould of plastics surface, Improve product quality.

Exemplified as above is only the illustration to the present invention, does not constitute the restriction to protection scope of the present invention, all It is that design same or analogous with the present invention is belonged within protection scope of the present invention.

Claims

1. a kind of manufacture method of nonmetal mould, it is characterised in that：Comprise the following steps：

C 0.20%-0.40%, Cr 0.8%-1.5%, Si 0.5%-1.2%, Ni 0.2%-0.5%, Mo 0.38%- 0.75%th, MnO 0.35%-0.45%, V≤0.3%, B≤0.02%, Cu≤1.0%, remaining is for Fe and inevitably Impurity；

（2）Dispensing is carried out according to said components and percentage by weight, and material is put into into melting in vacuum degassing furnace, molten steel melts Refining temperature adds nitrided ferro-chromium to carry out melting at 1450-1650 DEG C, into molten steel；

（4）To the steel ingot after electroslag remelting using heating stove heat, furnace temperature is not higher than 580 DEG C during steel ingot shove charge, heats up with stove, and After being at least incubated 2 hours at 600 DEG C, then heat up, after reaching 1000 ± 30 DEG C, continue to be incubated at least 2 hours, come out of the stove afterwards； Again the steel ingot to being heated is forged or rolled at 800-1000 DEG C, or is rolled after being forged, and obtains mould steel；

（5）By step（4）In the mould steel that obtains quenched and temper；Hardening heat is controlled at 1100 DEG C -1200 DEG C, temperature retention time is 0.8-1 hours, and the type of cooling is gradient cooling；Tempering adopts average tempering, temperature control 400 DEG C- 450 DEG C, it is incubated in salt bath furnace after 2-2.5 hours and is air cooled to room temperature；

（6）According to shape of product by step（5）In the mould steel that finally gives carry out machining and be finish-machined to mold shape；

（7）Blasting treatment is carried out to mould integral surface：Mould is processed using high-pressure spray gun, nozzle diameter is 1.5mm, Jet length die surface 220-280mm, horizontal movement velocity is 0.05m/s, and sand-blast material mixes for quartz sand with bead Material.

2. a kind of manufacture method of nonmetal mould as claimed in claim 1, it is characterised in that：

The step（1）In each chemical composition percentage by weight be C 0.3%, Cr 1.2%, Si 0.8%, Ni 0.3%, Mo 0.5%th, MnO 0.4%, V≤0.2%, B≤0.01%, Cu≤0.8%.

3. a kind of manufacture method of nonmetal mould as claimed in claim 1, it is characterised in that：The step（5）In, it is first right Mould steel carries out being quenched again after spheroidizing.

4. a kind of manufacture method of nonmetal mould as claimed in claim 3, it is characterised in that：The tool of the spheroidizing Body step is that mould steel is incubated into 2-4 hours at 850-900 DEG C, then cold with 30 DEG C per hour of rate of cooling stove, works as temperature Be cooled to 680 DEG C, be incubated 3-4 hours, it is then cold with 30 DEG C per hour of rate of cooling stove, temperature reach 550 DEG C after air cooling.