CN104209459A

CN104209459A - Improved valve body casting mold

Info

Publication number: CN104209459A
Application number: CN201410515593.5A
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: 2014-12-17

Abstract

The invention discloses an improved valve body casting mold, in particular relates to a sand casting mold. The mold comprises a sand box, a sand mold, a mold core and an anti-sticking coating layer, wherein an inner core of the mold core adopts a hollow structure; an exhaust hole is formed in the peripheral surface of the mold core; the sand mold is a multilayer structure, the part thereof contacted with the sand box uses common clay wet sand, and the part near the mold core uses resin sand; the anti-sticking coating layer is coated on one surface, forming a cavity with the mold core, of the sand mold; and a horn-shaped casting port is formed in the sand box. The improved valve body casting mold can effectively reduce the resin sand to decrease the cost, and can effectively reduce such problems as casting sand inclusion and casting sand holes to improve the casting yield.

Description

A kind of valve body casting mould that improves

Technical field

The invention belongs to casting and molding field, be specifically related to a kind of sand mold casting mold.

Technical background

The casting method of foundry goods is produced in sand casting in sand mold.Steel, iron and most of non-ferrous alloy casting all can obtain with sand mould casting method.Because the Modeling Material that sand casting is used is cheap and easy to get, Casting mold manufacturing is easy, and single-piece production to foundry goods, produce by batch and produce and all can adapt in a large number, 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.Simultaneously resin sand has good mobility, easily intensity is high, indeformable in carrying thereafter and mould assembling process after adjustable, the sclerosis of consolidation, demould time, the foundry goods of producing 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.The shortcomings such as but resin sand exists cost costliness, and gas forming amount is large.

Summary of the invention

The invention provides a kind of valve body casting mould that improves, efficiently solve the large problem of phenolic sand molding gas forming amount that adopts, save resin sand consumption, cost-saving.

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

Improve valve body casting mould, comprise sandbox, sand mold, core and anti-stick coating, it is characterized in that: the inner core of core is taked hollow structure, on core periphery, have steam vent; Described sand mold is sandwich construction, with common clay damp sand for sandbox contact portion, near core part resin sand; Described anti-stick coating, in sand mold and core contact site, is coated in sand mold outside; Described sandbox middle part has horn-like sprue gate.

The described horn-like mouth of building is communicated with the cavity part between core and sand mold.

Beneficial effect of the present invention is:

One, the inner core of core is taked hollow structure, and sand mold adopts the different sand structures of multilayer, can save a large amount of resin sand, thereby saves cost.

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

Three, on the core body periphery of core, have multiple steam vents, improved the venting quality in casting process, efficiently solve the large problem of resin sand sand mold gas forming amount.

Brief description of the drawings

Fig. 1 is structural representation of the present invention.

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

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 2 and anti-stick coating 3, it is characterized in that: the inner core of core 2 is taked hollow structure, on core 2 peripheries, have steam vent, hollow structure effectively reduces the use amount of resin sand in the time making core, cost-saving, improve and make core efficiency.Steam vent 4 on core 2 peripheries has strengthened degassing function, solves the large problem of Resin-bonded sand mold and core gas forming amount.Sand mold is taked double-layer structure, sand mold and sandbox contact portion are damp sand layer of sand 5 with common clay damp sand, are resin sand layer of sand 6 near core part resin sand, and the sand mold of double-layer structure had both ensured the advantage of resin sand sand mold, reduced the use amount of resin sand simultaneously, cost-saving.Anti-stick coating forms the position of cavity at sand mold and core, be coated in sand mold outside, after having built, while removing sand mold, can effectively reduce knockout, has saved knockout treatment step man-hour, enhances productivity.Sandbox middle part has horn-like sprue gate 7, the hidden danger of avoiding molten iron to spill bringing.

Claims

1. improve a valve body casting mould, comprise sandbox, sand mold, core and anti-stick coating, it is characterized in that: the inner core of core is taked hollow structure, on core periphery, have steam vent; Described sand mold is sandwich construction, with common clay damp sand for sandbox contact portion, near core part resin sand; Described anti-stick coating forms the one side of cavity at sand mold and core, be coated in sand mold outside; Described sandbox has horn-like sprue gate.

2. improvement valve body casting mould as claimed in claim 1, is characterized in that: the described horn-like mouth of building is opened in the middle of sandbox, is communicated with the cavity part between core and sand mold.