RU2637538C1 - Method of decoration of glassware - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: method of decoration of glassware includes the operations for applying a stencil from a copper or aluminium foil to a glassware, installing a glassware on a rotating device, feeding a glass powder into a plasma torch, plasma spraying the glass powder, removing the stencil and checking quality. The rotation of the rotating device is performed at a frequency of 10-15 s^-1, plasma spraying of glass powders with a grain composition of 60-400 mcm is carried out at the power of a plasma torch of 25-30 kW.

EFFECT: acceleration of the process of applying decorative coating to the glassware due to the absence of the operation of preheating of glassware and increasing the adhesion strength of the decorative coating to the surface of the glassware.

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Description

The invention relates to the field of glassware decoration and can be used in the glass industry.

The prior art method for decorating glass products, including the operation of preheating glass products, applying a stencil to the glass product, feeding the glass powder into a gas plasma torch and plasma spraying the glass powder [German I.I., Krokhin V.P., Immortal BC, Abdulselimov A.N., Shitova T.I. Plasma decoration of varietal dishes. // Glass and ceramics. 1983. No. 4. S. 9-10].

The disadvantage of this method is the length of the process of applying a decorative coating to glassware and low adhesion strengths of the decorative coating to the glassware surface.

The closest to the proposed method in terms of technical nature and the achieved result is a method of decorating glass products, which consists in preheating the glass products to 523 K, applying a stencil made of copper or aluminum foil, installing the glass on a turnstile rotating at a frequency of 3-5 s ^-1 , feeding to the plasma a glass powder burner with a grain composition of 80-250 μm and plasma powder spraying with a plasma torch operating power of 12-24 kW [Krokhin VP, Immortal BC, Panasenko VA, Dryzh N.A., Nikiforov VM Decoration of glass and products from it by plasma spraying // Glass and Ceramics. 1999. No3. S. 12-14].

The disadvantage of the prototype is the length of the process of applying a decorative coating on glassware, insufficient adhesion of the decorative coating to the surface of the glassware, and, as a result, the low quality of the finished product.

The technical result of the invention consists in accelerating the process of applying a decorative coating to glassware due to the lack of a pre-heating operation for glassware and in increasing the adhesion strength of the decorative coating to the glassware surface.

The technical result is achieved by the fact that the proposed method of decorating glass products, including the operation of applying a stencil of copper or aluminum foil to a glass product, installing glass on a rotating turnstile, supplying glass powder to a plasma torch, plasma spraying glass powder, removing the stencil and quality control, and the rotation of the tourist produced with a frequency of 10-15 s ^-1 , plasma spraying of glass powders with a grain composition of 60-400 microns is carried out with a plasma torch power of 25-30 kW.

The proposed method differs from the prototype in that the turnstile is rotated at a frequency of 10-15 s ^-1 , plasma spraying of glass powders with a grain composition of 60-400 microns is carried out with a plasma torch operating power of 25-30 kW.

The analysis of the known methods of decorating glass products allows us to conclude that the proposed method meets the criterion of "novelty."

A comparative analysis of the technological operations of the known and proposed methods, technological parameters of decorating glassware and their quality indicators are presented in tables 1 and 2.

As can be seen from tables 1 and 2, the optimal decoration parameters for glassware are observed at a turnstile rotation frequency of 10-15 s ^-1 , a plasma torch operating power of 25-30 kW, and when glass powders with grain compositions of 60-400 microns are introduced.

Example

For experimental verification, a glass of clear glass (Na-Cu-Si) was decorated.

For plasma spraying, a GN-5p plasma torch of the UPU-8M electric arc plasmatron was used. The plasma torch operation parameters: power 30 kW, plasma-forming gas - argon, the flow rate of which amounted to 0.00140 g / s at a pressure of 0.26 MPa. The distance from the plasma torch cut to the glass surface was 600 mm. As a glass powder, cobalt blue glass with grain compositions of 60-400 μm was used.

Before plasma spraying, a stencil made of aluminum foil was placed on the glass, then the glass was mounted on a rotating turnstile with a frequency of 15 s ^-1 and the GN-5p plasma torch was ignited. A powder burner of a plasma torch was injected for 15 s with a glass powder of blue cobalt glass with a grain composition of 60-400 microns. After spraying the decorative coating, the stencil was removed from the glass.

The adhesion strength of the decorative coating to the base was determined by the separation method on a tensile testing machine R-0.5. The average adhesion strength of the decorative coating to the base was 23 ± 1.5 MPa (table 3).

The optimal parameters for decorating glass products are presented in table 3.

From the above example, it can be seen that the claimed method of decorating glass products allows you to speed up the process of applying a decorative coating to glass products due to the lack of pre-heating of glass products and increase the adhesion of the decorative coating to the glass surface, and, as a result, improve the quality of finished products.

Claims (1)

A method of decorating glass products, including applying a stencil of copper or aluminum foil to a glass product, installing the glass product on a rotating turret, feeding the glass powder into a plasma torch, plasma spraying the glass powder, removing the stencil and quality control, characterized in that the rotation of the turnstile is performed at a frequency of 10- 15 s ^-1 , plasma spraying of glass powders with a grain composition of 60-400 microns is carried out with a plasma torch power of 25-30 kW.