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Spraying powder used for household appliance evaporator and preparation method thereof

A technology of spraying powder and evaporator, which is applied in the direction of powder coating, coating, polyester coating, etc. It can solve the problems of missed spraying or secondary spraying, waste of manpower and resources, and low powdering rate, so as to improve the powdering rate , Improve fluidity, reduce the effect of spraying thickness

Inactive Publication Date: 2014-10-08
蒋炳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the defects in the prior art that the spraying powder rate on the surface of the home appliance evaporator is low, causing missed spraying or secondary spraying, poor spraying effect, and waste of manpower and resources. A spraying powder for a home appliance evaporator and a preparation method thereof. The spraying powder of the present invention improves the fluidity, looseness and physical impact properties of the powder by improving the composition and its content, improves the powdering rate of the powder, and reduces the Spray thickness

Method used

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  • Spraying powder used for household appliance evaporator and preparation method thereof
  • Spraying powder used for household appliance evaporator and preparation method thereof
  • Spraying powder used for household appliance evaporator and preparation method thereof

Examples

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Embodiment 4

[0048] According to the conventional methods in this field, the spray powders of Examples 1-8 and the products of Comparative Examples 1-3 are used for spraying of wire tube evaporators and blown evaporators, and after spraying, they are baked and cured at a temperature of 155°C. After 15 minutes, measure the thickness of the sprayed layer if a qualified product is obtained. If a non-qualified product is obtained, repeat the spraying, and bake and cure under the same conditions until it is qualified. The sprayed coating thickness of all qualified products was detected, and the results are shown in Table 4.

[0049] Table 4 Spray coating thickness of wire tube evaporator and blown evaporator

[0050]

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PUM

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Abstract

The invention discloses spraying powder used for a household appliance evaporator and a preparation method thereof. The spraying powder comprises the following components in percentage by weight: 35%-45% of polyester resin, 35%-45% of epoxy resin, 0.2%-1% of charging additive, 1.2%-1.8% of flowable agent, 0.2%-1.1% of loose agent and filler. The preparation method comprises the following steps of: (1), uniformly mixing the components, and extruding and tableting under the condition of 135-155 DEG C to obtain tablets; (2), crushing the tablets and preparing powder with grain size of 10-80 mu m by cyclone separation. By improving components and content thereof, the mobility, friability and physical impact performance of the spraying powder disclosed by the invention are improved, the powder applying rate is improved and the spraying thickness is reduced.

Description

technical field [0001] The invention relates to a spraying powder for a home appliance evaporator and a preparation method thereof. Background technique [0002] Home appliance evaporator is an important component of household refrigeration appliances. The low-temperature condensed "liquid" passes through the evaporator to exchange heat with the outside air, and "gas" absorbs heat to achieve the cooling effect. In the production of home appliance evaporators, the surface needs to be sprayed to achieve good functions. [0003] In the prior art, the powders used in the spraying process of home appliance evaporators are mainly spraying powders mainly composed of polyester resin and epoxy resin. However, the problem of "spraying dead angle" generally exists in the spraying process, that is, after normal spraying, the inner corner part (steel wire welding seam) is easy to miss spraying. Occurrence of spray leakage makes the proportion of rework increase in the process of evapor...

Claims

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Application Information

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IPC IPC(8): C09D167/06C09D163/00C09D5/03C09D7/12
Inventor 蒋炳
Owner 蒋炳
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