CN202291231U

CN202291231U - Sand mold casting mold

Info

Publication number: CN202291231U
Application number: CN2011203178667U
Authority: CN
Inventors: 池昭就; 陈金源; 黎明
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2011-08-29
Filing date: 2011-08-29
Publication date: 2012-07-04
Anticipated expiration: 2021-08-29

Abstract

The utility model discloses a sand mold casting mold. In the sand mold casting mold, an internal wood-external plastic composite mold is adopted, and a composite layer is formed on the surface of a rough mold main body, so that an assembled wood blank of the mold is isolated from air and moisture, the stability of the wood stank is enhanced, the surface roughness of a wood mold can be reduced, the surface strength and wear resistance of the wood mold are enhanced, and the service life of the wood mold is prolonged.

Description

The sand casting mould

Technical field

The utility model relates to mould applications, particularly a kind of sand casting mould.

Background technology

For small lot sand casting, particularly the Large Sand mold casting is the saving cost; Its sand casting mould uses the wooden model of being made by timber usually, and trial-produce period is long, generally; Wooden Pattern Making need be coated with last layer zapon or shellac varnish after accomplishing on the wooden model surface, with the protection wooden model; But because zapon and shellac varnish are not wear-resisting, therefore after having used a period of time, the zapon on wooden model top layer or shellac varnish will be worn; Its protection was lost efficacy, thereby cause the wooden model lost of life, and along with the variation of weather; Wooden model also can be because of the variation of air humidity produces suction, dry variation, make wooden model structural slab and the viscose glue between the structural slab lost efficacy and cracking or distortion, and then cause the wooden model lost of life.This situation is for the long Large Sand mold casting wooden model of complex structure, life cycle, performance more obvious.

The utility model content

The technical problem that the utility model solves provides a kind of wear-resisting and be difficult for the sand casting mould of craze and transfiguration, long service life.

For achieving the above object, according to the utility model a kind of sand casting mould is provided, comprising: roughcast main body and be arranged on the composite bed of thick wooden model main body outer surface, the roughcast main body is processed by timber, and composite bed comprises: epoxy resin, curing agent and filler.

Further, the weight proportion of the epoxy resin of composite bed, curing agent and filler is 1: (0.14～0.2): 1.6.

Further, the thickness of composite bed is 20～30mm.

Further, be provided with blind rivet between composite bed and the thick wooden model main body.

Further, blind rivet protrudes the surperficial 10mm of said roughcast main body.

Technical scheme according to the utility model; Owing to adopted interior wood to mould compound die outward, on the roughcast body surfaces, establish composite bed, this structure can not only make timber blank and air, the aqueous vapor of mould after assembling completely cut off; Improved the stability of timber blank; Can also reduce the wooden model surface roughness, strengthen wooden model surface strength and anti-wear performance, and then prolong the service life of wooden model.

Description of drawings

Fig. 1 is the sectional structure sketch map according to the sand casting mould of the utility model;

Fig. 2 is the placement sketch map during according to the sand casting die casting of the utility model.

The specific embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the utility model is described in detail, but the protection domain that is to be understood that the utility model does not receive the restriction of the specific embodiment.

Referring to Fig. 1 and Fig. 2; This sand casting mould comprises: roughcast main body 1 and be arranged on the composite bed 2 of this roughcast main body 1 outer surface; Between this composite bed 2 and roughcast main body 1, be provided with blind rivet 3; Be used to reinforce the connection composite bed 2 and roughcast main body 1, this roughcast main body 1 are processed by timber, and mediation forms this composite bed 2 with filler (FILLER DT 082 or talcum powder) for epoxy resin (RENLAM M-1), curing agent (REN HY 956); Wherein the weight ratio of epoxy resin, curing agent, filler is preferably 1: (0.14～0.2): 1.6, and these composite bed 2 thickness are 20～30mm.Owing to adopted interior wood to mould compound die outward; On roughcast main body 1 surface, establish composite bed 2; This structure can not only make timber blank and air, the aqueous vapor of mould after assembling completely cut off, and has improved the stability of timber blank, can also reduce the wooden model surface roughness; Strengthen wooden model surface strength and anti-wear performance, and then prolonged the service life of wooden model.

The preparation method of this sand casting mould may further comprise the steps:

(1) utilizes three-dimensional software to carry out three-dimensional and divide mould, the nc program of establishment profile apperance and former;

At first, utilize three-dimensional software (like Pro/E) to create the profile apperance (not shown) of mould, the profile apperance back suction through mould goes out former 4 (as shown in Figure 2), and former 4 is evenly amplified 5mm as processing capacity; Again according to creating the nc program that good profile apperance and former 4 are worked out profile apperance and former 4.

Because the curved surface of this sand casting mould is more; Directly carry out relatively difficulty of mould design according to product engineering figure; Therefore, utilize three-dimensional software (like Pro/E) to carry out three-dimensional and divide mould, can remove in the traditional design method mould designer from the space imagination of the two and three dimensions of complex-shaped surface mould, core; Design difficulty and Mould Machining difficulty can be reduced, and this Mould design precision can be improved.

(2) making of former;

At first, foam blank of blanking, guaranteeing has enough allowance, and the density of foamed plastics is at 20kg/m ³More than, utilize Digit Control Machine Tool to obtain former 4 again, and carry out the finishing slyness of former 4 die cavities according to the nc program processing that weaves.

(3) making of roughcast main body;

The wooden model workman is according to the wooden model structure chart; Roughcast main body 1 is accomplished in roughing, and on the surface a plurality of blind rivets 3 (as depicted in figs. 1 and 2) is set, and the surface of blind rivet 3 protrusion roughcast main bodys 1 is about 10mm; When composite bed 2 is cast to 1 last time of roughcast main body; Blind rivet 3 plays the effect of the composite bed 2 of tension casting, has increased the fastness of entire die, the service life of having improved mould.The steam vent (not shown) also will be carried out in position in roughcast main body 1 depression, guarantees the quality of casting.

(4) casting composite bed;

At first, be suspended on correct position in the former 4 (this moment, the periphery of former 4 adopted wooden frame 6 to reinforce) to roughcast main body 1 through support 5, then, casting composite bed 2 in former 4 adopts during casting and presses case, prevents that roughcast main body 1 from floating in casting cycle.Composite bed 2 by the weight ratio of epoxy resin, curing agent, filler by 1: (0.14～0.2): 1.6 are in harmonious proportion the back casting forms.After treating that composite bed 2 solidifies, the profile apperance of taking out mould.

(5) numerical control processing and forming;

The profile apperance of the mould that comes out casting is carried out (like polishing) after removing surface and some common process, utilizes Digit Control Machine Tool to carry out the numerical control processing and forming according to the nc program that weaves again.

Should mould the compound die preparation method outside the interior wood, step is simple and clear, easy to operate, and the wooden model of making is appearance looks elegant not only; And stability is high, wearability is good, has prolonged the service life of wooden model greatly, simultaneously; Can alleviate working strength of workers, shorten the Mold Making cycle.

More than a disclosed specific embodiment that is merely the utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into the protection domain of the utility model.

Claims

1. a sand casting mould is characterized in that, comprising: roughcast main body and be arranged on the composite bed of said thick wooden model main body outer surface, and said roughcast main body is processed by timber, and said composite bed comprises: epoxy resin, curing agent and filler.

2. sand casting mould according to claim 1 is characterized in that, the weight proportion of the epoxy resin of said composite bed, curing agent and filler is 1: (0.14～0.2): 1.6.

3. sand casting mould according to claim 2 is characterized in that, the thickness of said composite bed is 20～30mm.

4. sand casting mould according to claim 1 is characterized in that, is provided with blind rivet between said composite bed and the thick wooden model main body.

5. sand casting mould according to claim 4 is characterized in that, said blind rivet protrudes the surperficial 10mm of said roughcast main body.