CN201752755U

CN201752755U - Mold for manufacturing wax patterns

Info

Publication number: CN201752755U
Application number: CN2010201596334U
Authority: CN
Inventors: 邓元华; 林景溪
Original assignee: QUANZHOU TENGDA FINE CASTING CO Ltd
Current assignee: QUANZHOU TENGDA FINE CASTING CO Ltd
Priority date: 2010-04-09
Filing date: 2010-04-09
Publication date: 2011-03-02
Anticipated expiration: 2020-04-09

Abstract

The utility model discloses a mold for manufacturing wax patterns, which is used for molding wax patterns with inner walls provided with projections and comprises an upper mold and a lower mold. The lower mold is provided with a cavity, the upper mold is fixedly provided with a mold core capable of penetrating into the cavity, the mold core comprises a body, a movable block, a shaft lever and an upper cover, the shape of the body matches with that of an inner cavity of each wax pattern, the body is provided with a holding groove capable of extending radially, the movable block is slidably arranged in the holding groove and provided with a molding groove and a driving groove, the molding groove is located on the surface of the outer side of the movable block, the shape of the molding groove matches with that of the projection of the wax pattern, the extending direction of the driving groove is deviated from that of the holding groove, the shaft lever is fixedly connected with the body, the upper cover is provided with a center hole and a driving rod, the shaft lever is hermetically sleeved in the center hole, and the driving rod is in catch connection with the driving groove. The mold has high demolding effect.

Description

A kind of mould of making wax-pattern

Technical field

The utility model relates to the mould in the precision-investment casting field, relate in particular a kind of when the moulding inwall has the wax-pattern of projection used mould.

Background technology

Precision-investment casting is a kind of casting technique of cutting less or not having cutting, is the technology of an excellence in the casting industry, and its application is very extensive.It is not only applicable to the casting of all kinds, various alloys, and the casting dimension accuracy of producing, surface quality are than other casting method height, even other casting method be difficult to cast complexity, high temperature resistant, the foundry goods that is not easy to process, all can adopt precision-investment casting to cast.Existing investment precision casting technology is realized by following operation:

1, make metal pattern: according to the pattern of detail of design making workpiece, pattern generally is made of aluminum;

2, make wax-pattern: wax is injected in the pattern, wax-pattern is taken out after waiting the wax cooling, at this moment wax-pattern consistent with the natural scale of workpiece (actual size is amplified to some extent according to casting shrinkage rates);

3, hang sand: the wax-pattern surface is stained with, is stained with Star to certain thickness with casting model powder;

4, dewax: the wax-pattern behind the extension sand is put into water and is boiled boiling of wax, finally stays next arenaceous shell;

5, roasting: arenaceous shell is carried out roasting, make it have certain intensity;

6, casting: molten iron is poured in the arenaceous shell after the roasting, waits the molten iron cooling back demoulding promptly to obtain foundry goods.

When the moulding wax-pattern, mould of the prior art generally includes upper die and lower die, and this counterdie has die cavity, this patrix then is installed with the core rod that can penetrate in this die cavity, be reserved with the space between this core rod and this counterdie, this space promptly is full of for liquid wax, and then forms wax-pattern.

For the wax-pattern that is formed with projection on the inwall, it is when moulding, core rod with patrix is reserved with and bump position and the corresponding to space of shape often, this space occupies for liquid wax, so when the moulding wax-pattern, this space will be connected with the space between core rod and the counterdie, has promptly formed the wax-pattern that inwall has projection, though this method can realize basic effect.But, use the mould of this method at present, it is when carrying out stripping process, because the projection on this wax-pattern can hinder the demoulding of the core rod that is positioned at the projection below, at this problem, existing scheme is that core rod is split as polylith, promptly comprise the part of not blocked part and being positioned at the projection bottom by projection, though can realize the demoulding substantially like this, this part that is positioned at the projection bottom then has the defective of demoulding inconvenience, thereby has influenced the demoulding efficiency of whole core rod greatly.

In view of this, the inventor has this case to produce at the problem further investigation that the core rod demoulding efficiency is low in the existing mold then.

The utility model content

The purpose of this utility model is to provide a kind of mould of making wax-pattern, to solve prior art when the moulding inwall has the wax-pattern of projection, has the low problem of demoulding efficiency.

In order to reach above-mentioned purpose, solution of the present utility model is:

A kind of mould of making wax-pattern is used for the wax-pattern that the moulding inwall has projection, comprises upper die and lower die, and this counterdie has die cavity, and this patrix then is installed with the core rod that can penetrate in this die cavity, and wherein, this core rod comprises body, movable block, axostylus axostyle and loam cake; This this body profile is matched with the inner chamber of wax-pattern, and has the storage tank that radially extends; This movable block slidably is arranged in the storage tank, and has forming tank and driver slot, and this forming tank is positioned at the movable block outer surface and is complementary with the projection shape, and the bearing of trend of this driver slot deviates from the bearing of trend of this storage tank; This axostylus axostyle and body are fixedly linked; This loam cake has centre bore and drive rod, and this centre bore is sheathed for this axostylus axostyle, and this drive rod then links to each other with this driver slot stopper.

Further, the bearing of trend of this driver slot is perpendicular to the bearing of trend of this storage tank.

Further, this loam cake also convexes with action bars.

After adopting said structure, the mould of the making wax-pattern that the utility model relates to, when matched moulds, only need to rotate this loam cake, this moment should on the drive rod that covers can this driver slot of ejection, thereby make movable block slide laterally and arrive shaping position along storage tank, the forming tank on this moment this movable block then and the molding space between external mold and the core rod be connected state, get final product pouring liquid wax this moment, this wax-pattern that forms out is so have the projection that mates with forming tank; And when die sinking, only need this loam cake of backward rotation, be somebody's turn to do this driver slot of drive rod meeting ejection that covers this moment, thereby make this movable block slide to the inside along storage tank, and make this movable block break away from stopping of this moulding projection, thus can be so that the demoulding of core rod, and then finish stripping process.So the utlity model has the high advantage of demoulding efficiency.

Description of drawings

A kind of mould of making wax-pattern that Fig. 1 relates to for the utility model when matched moulds, the combination schematic diagram of this core rod and wax-pattern;

Fig. 2 is the part decomposing schematic representation of Fig. 1;

The vertical view of a kind of mould of making wax-pattern that Fig. 3 relates to for the utility model when matched moulds;

A kind of vertical view of mould when treating the demoulding of making wax-pattern that Fig. 4 relates to for the utility model.

Among the figure:

Core rod 1 body 11

Storage tank 111 movable blocks 12

Forming tank 121 driver slots 122

Axostylus axostyle 13 loam cakes 14

Centre bore 141 drive rods 142

Wax-pattern 2 inner chambers 21

Projection 22

The specific embodiment

In order further to explain the technical solution of the utility model, the utility model is elaborated below by specific embodiment.

As shown in Figures 1 and 2, a kind of mould of making wax-pattern 2 that the utility model shown in it relates to, the mould that the utility model relates to mainly is to be applied to the wax-pattern 2 that the moulding inwall has projection 22, it comprises patrix (not shown) and counterdie (not shown), this counterdie has die cavity, this patrix then is installed with the core rod 1 that can penetrate in this die cavity, for these upper die and lower die, because itself and improvement of the present utility model have nothing to do, and can adopt scheme of the prior art, so be not described in detail, below to improvement of the present utility model promptly this core rod 1 be described in detail:

This core rod 1 comprises body 11, movable block 12, axostylus axostyle 13 and loam cake 14, wherein:

This body 11, its profile are matched with the inner chamber 21 of wax-pattern 2, thereby make can mold required wax-pattern 2 when liquid wax is poured into, and this body 11 also has the radially storage tank 111 of extension simultaneously;

This movable block 12, slidably be arranged in the storage tank 111, and can be sealing state with this body 11, thereby avoid entering of liquid wax, this movable block 12 also has forming tank 121 and driver slot 122, this forming tank 121 is positioned at movable block 12 outer surfaces and is complementary with projection 22 shapes, thereby be used for the projection 22 on the moulding wax-pattern 2, the bearing of trend of this driver slot 122 deviates from the bearing of trend of this storage tank 111, as shown in Figure 2, and in the present embodiment, preferably, the bearing of trend of this driver slot 122, gets final product thereby can drive movable block 12 slips by following drive rod 142 as long as both directions depart from perpendicular to the bearing of trend of this storage tank 111;

This axostylus axostyle 13 preferably is arranged on the center of body 11, and is fixedly linked with body 11;

This loam cake 14 has centre bore 141 and drive rod 142, and this centre bore 141 is sheathed for these axostylus axostyle 13 sealings, and 142 these driver slot 122 stoppers of this drive rod link to each other, and slide along storage tank 111 thereby drive this movable block 12.

Need to prove, the mould of the making wax-pattern 2 that the utility model relates to its can be according to actual needs projection 22 shapes and number and adjusting accordingly, and Fig. 1 and Fig. 2 just adopt two projections 22 to be described, it can also all be provided with projection 22 for one, three or full annular certainly, this moment only need storage tank 111 be set according to the number of concrete projection 22 and movable block 12 gets final product, and its set-up mode does not just exemplify one by one at this.

For the ease of this loam cake 14 is rotated, these loam cake 14 peripheries also convex with the action bars (not shown), so only need break the rotation that this action bars can drive this loam cake 14 off with the fingers and thumb.

Below the course of work of the present utility model is described in detail:

As shown in Figure 3, the mould that the utility model relates to, when matched moulds, only need break this action bars off with the fingers and thumb, and drive this loam cake 14 and rotate, drive rod on this loam cake 14 142 is understood these driver slots 122 of ejection at this moment, thereby make movable block 12 slide laterally and arrive shaping position along storage tank 111, promptly this body 11 is accepted mutually with movable block 12, thereby mold qualified product, 121 of forming tank on this movable block 12 and the molding space between counterdie and the core rod 1 are connected state at this moment, and can inject liquid wax this moment, and this wax-pattern that forms out 2 is so have the projection 22 that mates with forming tank 121;

As shown in Figure 4, the mould that the utility model relates to, when die sinking, only need oppositely break this action bars off with the fingers and thumb, thereby this loam cake 14 is rotated, at this moment 142 these driver slots 122 of meeting ejection of the drive rod on this loam cake 14, thereby make this movable block 12 slide to the inside along storage tank 111, and make this movable block 12 break away from stopping of these moulding projections 22, thus can be so that the demoulding of core rod, and then finish stripping process.

In sum, get final product so the mould of the making wax-pattern 2 that the utility model relates to when the demoulding, only needs to rotate this loam cake 14, thereby make stripping forming have the high effect of demoulding efficiency.

The foregoing description and graphic and non-limiting product form of the present utility model and style, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present utility model to its suitable variation or modification of doing.

Claims

1. a mould of making wax-pattern is used for the wax-pattern that the moulding inwall has projection, comprises upper die and lower die, this counterdie has die cavity, this patrix then is installed with the core rod that can penetrate in this die cavity, it is characterized in that this core rod comprises body, movable block, axostylus axostyle and loam cake; This this body profile is matched with the inner chamber of wax-pattern, and has the storage tank that radially extends; This movable block slidably is arranged in the storage tank, and has forming tank and driver slot, and this forming tank is positioned at the movable block outer surface and is complementary with the projection shape, and the bearing of trend of this driver slot deviates from the bearing of trend of this storage tank; This axostylus axostyle and body are fixedly linked; This loam cake has centre bore and drive rod, and this centre bore is sheathed for this axostylus axostyle, and this drive rod then links to each other with this driver slot stopper.

2. a kind of mould of making wax-pattern as claimed in claim 1 is characterized in that the bearing of trend of this driver slot is perpendicular to the bearing of trend of this storage tank.

3. a kind of mould of making wax-pattern as claimed in claim 1 is characterized in that this loam cake also convexes with action bars.