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Plastic bottle cover mould having surface with diamond like composite coating

A composite coating and surface coating technology, which is applied in metal material coating technology, coating, gaseous chemical plating, etc., can solve the problems of reduced thermal conductivity of the mold surface, affecting the demoulding effect, and insufficient mold life, etc., to achieve Reduce stress, alleviate physical property mismatch, and improve wear resistance

Inactive Publication Date: 2018-01-16
上海紫日包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current bottle cap mold mainly has the following problems: (1) The life of the mold is insufficient and the wear is serious; (2) The heavy metal elements of the mold itself will pollute the bottle cap, and then pollute the beverage in the bottle; (3) The thermal conductivity of the mold surface will decrease with wear and tear. (4) The surface of the bottle cap mold has a strong affinity with the plastic, which affects the demoulding effect and causes a high scrap rate
Generally, the bottle cap plastic has a strong adhesion to the mold in the plasticized state. If the adhesion is too strong when the punch is pulled out from the bottle cap, the demoulding efficiency will be affected in the slightest, and the bottle cap will be damaged in severe cases. form waste

Method used

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  • Plastic bottle cover mould having surface with diamond like composite coating
  • Plastic bottle cover mould having surface with diamond like composite coating
  • Plastic bottle cover mould having surface with diamond like composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Coating material: Ti / DLC, Cr / DLC or CrN / DLC

[0032] Coating Substrate: Beryllium Copper or Corrosion Resistant Steel

[0033] (1) Mold surface treatment. First place the mold base in absolute alcohol for manual cleaning to remove hard-to-remove adhesions on the surface. Then perform ultrasonic cleaning with acetone on the surface of the mold substrate to further remove oil stains and impurities on the surface. The cleaning time is 30 minutes. After cleaning, take it out after drying.

[0034] (2) Preparation of transition layer. Clamp the dried mold base and send it into the cathodic arc deposition equipment equipped with high-purity rectangular Ti (99.99%) target and rectangular Cr (99.99%) target, vacuumize the furnace cavity to 0.006mbar, and the base Heat to 200°C.

[0035] When beryllium copper is used as the base material and the Ti transition layer is prepared, the Ar gas flow rate is 200 sccm, the Ti target current is 120 A, the base bias voltage is 450 V,...

Embodiment 2

[0041] Scanning electron microscopy (200FEG Quanta) was used to measure the coating thickness, and the cross-sectional structure of the coating was as follows: figure 1 As shown, the thicknesses of the transition layers Ti, Cr, and CrN are 0.65 μm, 0.78, and 0.71 μm, respectively, and the thickness of the diamond-like coating is 1.65 μm.

Embodiment 3

[0043] The microhardness of the coating was measured with a Nano Indenter XP nanoindenter from MTS Corporation of the United States and a diamond indenter.

[0044] Experimental parameters: CSM method, thermal drift rate 0.05nm / s, indentation depth 200nm.

[0045] The microhardness of the three coatings are as follows figure 2 As shown, significantly greater than the matrix hardness.

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Abstract

The invention relates to the field of surface treatment of metal molds, in particular to a plastic bottle cap mold with a diamond-like composite coating. The preparation method of the composite coating includes the treatment of the mold surface, the preparation of the transition layer, and the preparation of the diamond-like coating. The invention applies the advanced PVD diamond-like coating technology to the surface of the ultra-high-speed bottle cap mold to improve the wear resistance and anti-adhesion performance of the mold surface. The composite coating has the advantages of small friction coefficient, good thermal conductivity, anti-adhesion, wear resistance, high hardness, corrosion resistance, no pollution, etc., taking into account the advantages of graphite and diamond, and has good results in plastic molds. The coated mold has the advantages of high hardness and small friction coefficient, and the service life is greatly improved compared with the uncoated mold.

Description

technical field [0001] The invention relates to the field of metal mold surface treatment, in particular to a plastic bottle cap mold with a diamond-like composite coating on the surface. Background technique [0002] The working conditions of the mold are very harsh, such as ultra-high speed, high stress, high adhesion, etc. will cause premature damage to the surface of the mold. Therefore, the application and development of advanced, pollution-free and zero-emission surface technology is an urgent problem for enterprises to solve. At present, the mold materials for manufacturing bottle caps are mainly beryllium copper and super corrosion-resistant powder steel M390. Due to the large number of bottle caps, there are very high requirements for the life and reliability of the bottle cap mold. The current bottle cap mold mainly has the following problems: (1) The life of the mold is insufficient and the wear is serious; (2) The heavy metal elements of the mold itself will po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/26C23C16/02B29C33/38
Inventor 施舒扬郭亮
Owner 上海紫日包装有限公司
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