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Anti-adhesion hard coating for injection mold and preparation method thereof

A technology of hard coating and injection mold, which is applied in the direction of coating, metal material coating process, ion implantation plating, etc., can solve the problems of labor cost and economic cost increase, and solve the problems of easy adhesion and surface resistance. grinding effect

Active Publication Date: 2019-04-09
SUZHOU CHAMPION COATING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a release agent is used to prevent adhesion, it is necessary to add a process of brushing or spraying a release agent in the injection molding production process, resulting in increased labor and economic costs

Method used

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  • Anti-adhesion hard coating for injection mold and preparation method thereof
  • Anti-adhesion hard coating for injection mold and preparation method thereof
  • Anti-adhesion hard coating for injection mold and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] First, the mold base is cleaned and dried;

[0047] In the next step, the metal Cr layer (bonding layer) is deposited by magnetron sputtering ion plating: vacuumize to 0.8×10 -3 The vacuum degree is above Pa, and then argon gas (Ar, with a purity of 99.99%) is introduced, the air pressure is controlled at 0.3-0.8pa, the Cr target current is 1.2A, the negative bias voltage is 120V, the bias frequency is 180kHz, and the thickness of the deposited layer is about 2μm.

[0048] In the next step, the CrN layer (transition layer) is deposited by magnetron sputtering ion plating: vacuumize 0.8×10 -3 The vacuum degree is above Pa, and then the nitrogen gas (N 2 , the purity is 99.999%), the air pressure is controlled at 0.8-1.2pa, the Cr target current is 0.6A, the negative bias voltage is 60V, the bias frequency is 60kHz, and the thickness of the deposited layer is about 3 μm.

[0049] In the next step, the (Cr,Ni)N / DLC composite layer is deposited by magnetron sputtering ion...

Embodiment 2

[0055] The cleaning and drying of the mold substrate is the same as in Embodiment 1.

[0056] According to the method of Example 1, a metal Cr layer (bonding layer) is deposited.

[0057] According to the method of Example 1, a CrN layer (transition layer) is deposited.

[0058] In the next step, the (Cr,Ni)N / DLC composite layer is deposited by magnetron sputtering ion plating: vacuumize 0.8×10 -3 The vacuum degree is above Pa, and then the nitrogen gas (N 2 , the purity is 99.999%), the air pressure is controlled at 0.1-0.4pa, three targets are co-sputtered, the Cr target current is 0.6A, the Ni target current is 0.15A, the C target current is 2.5A, the negative bias voltage is 120V, and the bias frequency is 120kHz. The thickness of the deposited layer is about 6 μm.

[0059] According to the methods in the examples, the (Cr,Ni)N / DLC / CNTs composite layer was prepared.

[0060] In the next step, (Cr,Ni)N / DLC-CF was prepared by glow discharge plasma modification 3 / CNTs-C...

Embodiment 3

[0062] The cleaning and drying of the mold substrate is the same as in Embodiment 1.

[0063] According to the method of Example 1, a metal Cr layer (bonding layer) is deposited.

[0064] According to the method of Example 1, a CrN layer (transition layer) is deposited.

[0065] According to the method of Example 1, the (Cr,Ni)N / DLC composite layer was deposited.

[0066] In the next step, the (Cr,Ni)N / DLC / CNTs composite layer was prepared by heat treatment in a protective atmosphere: the protective atmosphere was argon (Ar, with a purity of 99.99%), the air pressure was normal pressure, and the heating rate was 2°C / min. The temperature is 760°C, the holding time is 8 hours, and it is cooled down to room temperature with the furnace cooling.

[0067] According to the method of Example 1, modified preparation (Cr, Ni) N / DLC-CF 3 / CNTs-CF 3 Composite layer (hard anti-adhesion functional layer).

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Abstract

The invention relates to an anti-adhesion hard coating for an injection mold and a preparation method thereof. A layer of composite coating containing a hard metal / a hard ceramic phase / a carbon material is deposited on the surface of an inner cavity of a mold, surface modification of low-surface energy and structural design of low-surface energy is performed on the coating, and the problems that the injection-molded hot blank is easy to adhere and the surface is wear-resistant are solved under the condition that a mold release agent is not used, the painting is omitted / the release agent is sprayed. The anti-adhesion hard coating for the injection mold and the preparation method thereof are tightly combined with a metal surface coating preparation technology and a plasma modification technology and the like, a heterogeneous composite coating structure is constructed, the outer surface of the coating is further modified, a hard composite coating for preventing the hot blank from being adhered on the surface of the injection mold is formed, the composite coating has the advantages that the surface of the injection mold has high abrasive resistance, and meanwhile good anti-adhesion performance is obtained.

Description

technical field [0001] The invention relates to an anti-adhesion hard coating for injection molds and a preparation method thereof, belonging to the technical field of metal surface treatment. Background technique [0002] With the rapid development of the plastics industry and the popularization and application of plastic products in various fields such as industrial production and life, the production of plastic products has more and more stringent requirements for injection molds. At present, the service life of injection molds is often short, especially the dimensional accuracy and surface roughness of the mold surface are destroyed quickly. An important cause of failure is that the contact between the hot blank and the mold surface will produce very strong adhesion, resulting in high friction, resulting in failure of the mold cavity surface. In addition, the sticking of the blank to the cavity surface of the mold will lead to defects in the products produced when the m...

Claims

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Application Information

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IPC IPC(8): C23C14/06C23C14/16C23C14/35
CPCC23C14/0036C23C14/0605C23C14/0641C23C14/165C23C14/35
Inventor 陈君乐务时
Owner SUZHOU CHAMPION COATING TECH
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