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Process method for automobile bottom plate powder coating

A technology of powder coating and process method, which is applied in the direction of powder coating, device for coating liquid on the surface, coating, etc. It can solve the problems of complex curing conditions, low spraying quality, long spraying cycle, etc., and achieve short curing time , low preparation cost and simple preparation method

Inactive Publication Date: 2017-12-01
ANHUI TIANYU AUTO PARTS MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, water-based coatings are mostly used for the protection of automobile floor coatings. The spraying process has defects such as complicated curing conditions, long spraying cycle, and low spraying quality.

Method used

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  • Process method for automobile bottom plate powder coating

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of technological method of powder coating of automobile floor that the present invention proposes, comprises the following steps:

[0018] S1, prepare raw materials, including novolak epoxy resin 26wt%, carboxyl polyester resin 22wt%, epoxy acrylate 25wt%, pigment 5wt%, cast stone powder 12wt%, graphene oxide 5wt% and the processing aid of the remainder, wherein Processing aids include curing agent, accelerator, degassing agent, anti-wear agent, leveling agent, antioxidant and dispersant. After mixing the above raw materials evenly, they are melted and extruded by a twin-screw extruder, and finally pulverized and ground Finely made powder coating with a particle size of 300μm;

[0019] S2. After sandblasting and roughening the car floor, place it at a temperature of 95°C, then perform spray degreasing and hot water washing in sequence, each time for 25 minutes, and after cleaning, place it at a temperature of 123°C and dry for 15 minutes , to pre-treat the car f...

Embodiment 2

[0023] A kind of technological method of powder coating of automobile floor that the present invention proposes, comprises the following steps:

[0024] S1, prepare raw materials, including novolak epoxy resin 24wt%, carboxyl polyester resin 20wt%, epoxy acrylate 21wt%, pigment 3wt%, cast stone powder 10wt%, graphene oxide 3wt% and the processing aid of the remainder, wherein Processing aids include curing agent, accelerator, degassing agent, anti-wear agent, leveling agent, antioxidant and dispersant. After mixing the above raw materials evenly, they are melted and extruded by a twin-screw extruder, and finally pulverized and ground Fine powder coating with a particle size of 100 μm;

[0025] S2. After sandblasting and roughening the car floor, place it at a temperature of 88°C, then perform spray degreasing and hot water washing in sequence, each time for 22 minutes, and after cleaning, place it at a temperature of 115°C and dry for 12 minutes , to pre-treat the car floor; ...

Embodiment 3

[0029] A kind of technological method of powder coating of automobile floor that the present invention proposes, comprises the following steps:

[0030] S1, prepare raw materials, including novolac epoxy resin 22wt%, carboxyl polyester resin 17wt%, epoxy acrylate 19wt%, pigment 1wt%, cast stone powder 8wt%, graphene oxide 1wt% and the rest of the processing aid, wherein Processing aids include curing agent, accelerator, degassing agent, anti-wear agent, leveling agent, antioxidant and dispersant. After mixing the above raw materials evenly, they are melted and extruded by a twin-screw extruder, and finally pulverized and ground Finely made powder coating with a particle size of 1 μm;

[0031] S2. After sandblasting and roughening the car floor, place it at a temperature of 80°C, then perform spray degreasing and hot water washing in sequence, each time for 18 minutes, and after cleaning, place it at a temperature of 108°C and dry for 8 minutes , to pre-treat the car floor;

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Abstract

The invention discloses a process method for automobile bottom plate powder coating. The process method comprises the following steps: preparing raw materials, uniformly mixing the raw materials, performing melting extrusion by using a double-screw extruder, and finally crushing and grinding so as to obtain a powder coating; performing sand blasting roughening on an automobile bottom plate, performing ejection degreasing cleaning, performing hot water cleaning treatment, and performing drying treatment; preheating the pretreated automobile bottom plate, and performing powder coating operation on the surface of the preheated automobile bottom plate by using an electrostatic spray gun in an electric field environment; and performing high-temperature curing on the coated automobile bottom plate, cooling, performing quality inspection, and packaging after qualification, thereby obtaining a coated automobile bottom plate. The process method disclosed by the invention is simple to operate, mild in curing condition and short in curing time, and an obtained coating film has good properties of corrosion resistance, rusting resistance, collision prevention, noise prevention, wearing resistance, impact resistance and the like, is high in strength, good in dispersibility and good in adhesion property, plays a good protection role on an automobile bottom plate, is capable of effectively prolonging the service life of the automobile bottom plate, and is worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of powder coating technology, in particular to a process method for powder coating of an automobile bottom plate. Background technique [0002] The car floor is a part of the car chassis. It is a platform built with steel materials to install the car engine and its components, assemblies and carrying compartments, thus forming the overall shape of the car. The car floor is one of the core components of the car, and its quality is closely related to the stability of the car at high speed and its own safety. In the daily use of the car, the main causes of damage to the car floor are bottoming, foreign object impact and corrosion. If the bottom plate of the car is supported, the stability of the vehicle in high-speed driving will be greatly reduced, and sludge and acid rain will cause corrosion to the bottom plate of the car, thereby reducing the bearing capacity of the bottom plate of the car. Lead to safety...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/04C09D167/00C09D163/10C09D5/03C09D5/08C09D7/12B05D3/00B05D1/06B05D3/02
CPCC09D163/04B05D1/06B05D3/002B05D3/0254C08L2205/03C09D5/03C09D5/031C09D5/033C09D5/08C08L67/00C08L63/10C08K3/04C08K3/34
Inventor 李珍芳李支峰
Owner ANHUI TIANYU AUTO PARTS MFG
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