CN205967279U - Polystyrene foam model surface application structure - Google Patents

Abstract

The utility model relates to a polystyrene foam model surface application structure, this model first portion are polystyrene bubble model (1), and the model second portion is modified polyvinyl acetate coating (2), and model third part be polyurethane coating layer (3), and model (1) is steeped in modified polyvinyl acetate coating (2) attached to polystyrene on, polyurethane coating layer (3) are on attached to modified polyvinyl acetate coating (2). The utility model discloses showing improvement polystyrene foam model surface roughness, the superficial hardness is eliminated its surface particles and is felt strong, and the roughness is higher, solves the foundry goods and easily takes place scab and blowholes scheduling problem. And this method is easy and simple to handle, easily master, application prospect is wide. Guarantee polystyrene foam model production quality, society and economic benefits are showing.

Description

Polystyrene foam model surface painting structure

Technical field：

This utility model is related to a kind of polystyrene foam model surface painting structure.

Background technology：

Traditional polystyrene foam model is to carry out cutting whole into sections by fuse machine and band saw, splices by hand and passes through Milling machine machine-shaping.The problem being primarily present in actual applications has：(1) polystyrene foam is to be formed by heating melting Type, its surface particles sense is strong, and roughness is higher, thus affecting the surface quality of sand mold so that scab and sand holes etc. Defect occurrence probability significantly increases；(2) although polystyrene foam has cheap it is easy to process, short molding cycle The features such as, but due to when it is with the material directly contact such as the atomized ash being conventionally used to surface treatment and polyurethane paint, chemistry can occur Melt so that its surface quality is difficult to improve, significantly limit range of application in casting pattern for the polystyrene foam； (3) polystyrene foam hardness is relatively low, and damaged surfaces and the generation of metaboly, shadow can occur during actual molding operation Ring dimensional accuracy and the surface quality of foundry goods.

Content of the invention：

This utility model purpose is to provide one kind to significantly improve polystyrene foam model surface flatness, case hardness, Eliminate its surface particles sense strong, roughness is high, foundry goods easily occurs the process of the problems such as scab and sand holes.Of the present utility model Technical scheme is：A kind of polystyrene foam model surface painting structure, this model Part I steeps model for polystyrene (1), model Part II is modified polyvinyl acetate coating (2), and model Part III is polyurethane coating layer (3), modified Polyvinyl acetate coating (2) is attached on polystyrene bubble model (1), and polyurethane coating layer (3) is attached to modified poly- acetic acid In vinyl acetate coating (2).

Technique effect：

Polystyrene foam is relatively low due to integral hardness, if surface is directly processed using high hardness material, very It is susceptible to the phenomenon of face checking.This utility model structure is compared with traditional polystyrene foam model, significantly improves poly- Styrenic foams model surface flatness, case hardness, eliminate its surface particles sense by force, roughness is higher, solve foundry goods and easily send out The problems such as raw scab and sand holes, and this method easy and simple to handle it is easy to grasp, have a extensive future.Ensure polystyrene foam The model quality of production.

Wherein Part II modification polyvinyl acetate coating (2) is by adding rigid particles in polyvinyl acetate And wetting agent by certain technique mix merga pass brushing by way of and molding, this coating have good dry thickness with excellent Lubricity and high-wearing feature, and this coating be dried after there is certain intensity and excellent toughness, substantially avoid due to Matrix polystyrene steep model (1) difference of hardness and occur certain deformation when face coat cracking phenomenon occur, and this painting Layer serves the effect of isolation matrix, prevents matrix polystyrene bubble model (1) from polyurethane coating layer (3), chemical reaction occurring And melt.Part III polyurethane coating layer (3) can make block mold case hardness and fineness significantly improve, and rises Excellent corrosion resistance, water proofing property and weather-proof effect are arrived.

By the design of this polystyrene foam model surface painting structure so that overall polystyrene steeps model (1) surface Reach the feature of Pinus koraiensis solid wood model.

Brief description：

Fig. 1 polystyrene foam model surface painting structure diagrammatic cross-sectional view

Specific embodiment：

As shown in figure 1, this utility model is a kind of polystyrene foam model surface painting structure, this model Part I Steep model 1 for polystyrene, model Part II is modified polyvinyl acetate coating 2, model Part III applies for polyurethane The bed of material 3, modified polyvinyl acetate coating 2 is attached on polystyrene bubble model 1, and polyurethane coating layer 3 is attached to modified poly- In vinyl acetate coating 2.

Claims (1)

1. a kind of polystyrene foam model surface painting structure, is characterized in that：This model Part I steeps mould for polystyrene Type (1), model Part II is modified polyvinyl acetate coating (2), and model Part III is polyurethane coating layer (3), changes Property polyvinyl acetate coating (2) be attached on polystyrene foam model (1), polyurethane coating layer (3) is attached to modified poly- In vinyl acetate coating (2).