CN104226913A

CN104226913A - Valve body forming casting mold

Info

Publication number: CN104226913A
Application number: CN201410514969.0A
Authority: CN
Inventors: 高静; 袁代华; 邓金智
Original assignee: Chengdu Fanxinjia Technology Co Ltd
Current assignee: Chengdu Fanxinjia Technology Co Ltd
Priority date: 2014-09-30
Filing date: 2014-09-30
Publication date: 2014-12-24

Abstract

The invention discloses a valve body forming casting mold, and belongs to the field of casting molding. The mold comprises a sand box, a sand mold, a mold core and an anti-adhering coating, wherein the sand mold is of a double-layer structure; ordinary clay wet sand is adopted at a part in contact with the sand box, of the sand mold; resin sand is adopted at the part close to the mold core, of the sand mold; the mold core is of a double-core structure; double cores are arranged on one same horizontal line and are connected with each other through a connecting rod; horn-shaped casting holes are respectively formed in the left side and the right side of the sand box; the anti-adhering coating coats the contact part of the sand mold and the mold core and coats the outer side of the sand mold. By adopting the valve body forming casting mold, the resin sand can be effectively saved, the cost is reduced, the phenomenon that the mold core flows upwards under the action of the liquid metal pressure is effectively reduced, and the quality of a cast piece is improved.

Description

A kind of valve body shape casting die

Technical field

The invention belongs to casting and molding field, be specifically related to a kind of valve body shape casting die.

Technical background

Casting is the common method of producing foundry goods.Steel, iron and most of non-ferrous alloy casting all can obtain with sand mould casting method.The Modeling Material used due to sand casting is cheap and easy to get, and Casting mold manufacturing is easy, and to the single-piece production of foundry goods, produce by batch and produce in a large number and all can adapt to, for a long time, be the basic technology in Foundry Production always.

Resin sand is because its high strength, high density and good surface smoothness, and the casting dimension accuracy of producing is high, exterior contour is clear, dense structure, and foundry goods integrated quality is high.Resin sand has good mobility, easily consolidation simultaneously, demould time is adjustable, the rear intensity of sclerosis is high, indeformable in carrying thereafter and mould assembling process, the foundry goods produced than clay-bonded sand and oil-sand can improve 1-2 rank, and being often used to space flight navigation etc. needs in the manufacture of high accuracy foundry goods.But resin sand also exists cost intensive shortcoming, and general moulding, because the effect of liquid metals pressure there will be the phenomenon that core floats, the valve body wall thickness ununiformity of casting is even.

Summary of the invention

The invention provides a kind of valve body shape casting die, efficient solution saves phenolic sand molding consumption, cost-saving, prevents core rising phenomenon.

For achieving the above object, the technical solution used in the present invention is as follows:

Valve body shape casting die, comprises sandbox, sand mold, core and anti-stick coating, it is characterized in that: described sand mold is double-layer structure, with the common clay damp sand of sandbox contact portion, near core part resin sand; Described core is twin-core structure, and twin-core is on same level line, and is interconnected with connecting rod; On the left of described sandbox and again side has horn-like sprue gate; Described anti-stick coating, in sand mold and core contact site, is coated in outside sand mold.

Described horn-like mouth of building is communicated with respectively with the twin-core of core.

Beneficial effect of the present invention is:

One, sand mold adopts double-layer structure, with the common clay damp sand of sandbox contact portion, near core part resin sand, saves the use amount of resin sand in a large number, also ensure that the function of resin sand simultaneously.

Two, outside sand mold, scribble anti-stick coating, effectively reduce foundry goods burning into sand, the problems such as sand hole, improve casting yield.

Three, core adopts twin-core structure, effectively reduces because the effect of liquid metals pressure there will be the phenomenon that core floats, improves casting quality.

Four, sandbox has two sprue gates, can fast pouring, reduce setting time, thus reduce because the various harmful effects that come of setting time long band.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

Mark in figure: 1 is sandbox, and 2 is damp sand layer of sand, and 3 is core, and 4 is anti-stick coating, and 5 is resin sand layer of sand, and 6 is connecting rod, and 7 is horn-like running channel.

Detailed description of the invention

Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is further described.

As shown in Figure 1, valve sand mold casting mold, comprise sandbox 1, sand mold, core 3 and anti-stick coating 4, it is characterized in that: described sand mold is double-layer structure, is damp sand layer of sand 2 with sandbox contact portion with common clay damp sand, is resin sand layer of sand 5 near core part resin sand, sand mold adopts double-layer structure to save the use amount of resin sand in a large number, also ensure that the function of resin sand simultaneously.Core 3 adopts twin-core structure, and two core places in the same horizontal line, and are interconnected with connecting rod 6, effectively reduces because the effect of liquid metals pressure there will be the phenomenon that core floats, improves casting quality.Outside resin sand layer of sand, be provided with anti-stick coating 4 with core near position, effectively reduce foundry goods burning into sand, the problems such as sand hole, improve casting yield.On the left of described sandbox and again side has horn-like sprue gate 7, and horn-like mouth of building is communicated with respectively with the twin-core of core, can fast pouring, reduces setting time, thus reduces because the various harmful effects that come of setting time long band.

Claims

1. a valve body shape casting die, comprises sandbox, sand mold, core and anti-stick coating, it is characterized in that: described sand mold is double-layer structure, with the common clay damp sand of sandbox contact portion, near core part resin sand; Described core is twin-core structure, and twin-core is on same level line, and is interconnected with connecting rod; On the left of described sandbox and again side has horn-like sprue gate; Described anti-stick coating, in sand mold and core contact site, is coated in outside sand mold.

2. valve body shape casting die as claimed in claim 1, is characterized in that: described trumpet-shaped mouth of building is communicated with respectively with the twin-core of core.