CN2683282Y

CN2683282Y - Combined lost foam casting device

Info

Publication number: CN2683282Y
Application number: CN 200420025594
Authority: CN
Inventors: 曹博海
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-03-17
Filing date: 2004-03-17
Publication date: 2005-03-09
Anticipated expiration: 2014-03-17

Abstract

The utility model relates to a combined lost foam casting device which is composed of a foam plastic mould and a resin sand core. The various castings with complicated and special inner cavities can be conveniently assembled by the resin sand core which is arranged inside and the foam plastic mould. The combined lost foam casting device can save the production cost and greatly raise the casting quantity of the work piece.

Description

A kind of combined type lost foam casting device

Technical field: the utility model relates to a kind of lost foam casting device, particularly relates to a kind of widely used combined type disappearance mould in the casting industry that is used in.

Technical background: in the industry casting, lost foam casting does not generally adopt the loam core, the technology in loam core does not fall, but when producing the special foundry goods of some cavity shape, following problem might appear: 1) when apperance being applied material, when if inner chamber is to the greatest extent cun less or complex-shaped, occur sometimes coat layer thin irregular or be coated with less than phenomenon; 2) because the die cavity complexity needs to adopt a plurality of apperance assemblings, one is easy deformation after the too much assembly assembly unit; The 2nd, it is all higher in the gas forming amount and the residual carbon in when gasification to assemble used jointing material; The 3rd, the apperance of assembling may bonding not firm phenomenon occur because of the elasticity of plastics.Often occur defectives such as pore, scab, geomery variation owing to above reason foundry goods, thereby cause percent defective higher.The purpose of this utility model will provide a kind of combined type lost foam casting device exactly, can solve at present because foundry goods interior shape complexity, is easy to generate the defective of waste product during casting.

Summary of the invention: the purpose of this utility model is achieved in that a kind of combined type lost foam casting device is to have plastics apperance and loam core to combine, and it is characterized in that: described plastics apperance is a foam plastics mould; Described loam core is the resin sand loam core.The advantage of sectional pattern is: 1, compare with disappearance mould in the past, apperance in the past is not use the loam core, and has the loam core in the sectional pattern.Compare with the sand casting in frequent use loam core, the loam core of sand casting is to drop on before the mould assembling in the sand mold, and the loam core of this device is included in the foam plastics mould, and does not have " loam core falls " operation.2, the loam core that resin sand is made has been adopted in the combination loam core, does not adopt employed oil-sand and water-glass sand loam core in the sand casting, and this is because the gas forming amount in oil-sand loam core is big, is easy to generate gas hole defect, and relatively poor with the loam core collapsibility of water-glass sand.3, the foamed plastics density in the sectional pattern has descended, thereby can reduce the probability that produces pore, also can reduce the carbon increasing amount of foundry goods.

Description of drawings: Fig. 1 is a structural representation of the present utility model

In Fig. 1: 1, foamed plastics 2, resin sand loam core

The specific embodiment: the utility model is described in further detail below in conjunction with accompanying drawing.

In Fig. 1, a kind of combined type lost foam casting device is to have plastics apperance and loam core to combine, and it is characterized in that: described plastics apperance is a foam plastics mould 1, and described loam core is resin sand loam core 2.In the specific implementation, be that the inner required through hole of workpiece is made into resin sand loam core 2, the external form of workpiece is identical with sand casting, is made into model, the model that resin sand loam core 2 will be housed then carries out injection moulding, makes foamed plastics and resin sand loam core form sectional pattern.By test, cast same workpiece, the plastics weight that does not adopt sectional pattern is 20 grams, and adopt sectional pattern only weigh 17 grams, reduced 15%.The density decrease reason of foam plastics mould is the influence in loam core, though the appearance of apperance is bright and clean, internal particle loosens, but this does not influence the roughness in foundry goods shape chamber, and the roughness in the shape chamber depends on the surface appearance in resin loam core.Adopt this device, can cast the interior shape more complicated, and the more special cast member of cavity shape, have good value for applications.

Claims

1, a kind of combined type lost foam casting device is to have plastics apperance and loam core to combine, and it is characterized in that: described plastics apperance is foam plastics mould (1); Described loam core is resin sand loam core (2).