CN1070396C

CN1070396C - Combined centrifugal casting mould and method for manufacture said mould

Info

Publication number: CN1070396C
Application number: CN97121854A
Authority: CN
Inventors: 秦升益
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-12-09
Filing date: 1997-12-09
Publication date: 2001-09-05
Anticipated expiration: 2017-12-09
Also published as: CN1188697A

Abstract

The present invention relates to a combined casting mould used for centrifugal casting, especially for vertical centrifugal casting, and a method for making the casting mould. The casting mould comprises a bottom plate, a casting mould component on the bottom plate, and a connecting mechanism for connecting the casting mould component with the bottom plate, wherein the casting mould component comprises at least two casting mould members which can be mutually matched together and formed by hardening a mixture composed of an adhesive and a fire-resistant aggregate. The casting mould of the present invention has the advantages of simple manufacture, low cost and strong adaptability to casting change.

Description

Combined centrifugal casting mould and make the method for this casting mold

The present invention relates to a kind of combined centrifugal casting mould and make the method for this casting mold.

Centrifugal casting is used to casting black and non-ferrous casting widely as a kind of Special Processes of Metal Castings method, is characterized in that molten metal at centrifugal action lower charging type and solidifying, helps filling type, collection slag and exhaust, and it is less to obtain wall thickness, the foundry goods of dense structure.Metal mold is generally used in existing centrifugal casting, or is aided with tamper in metal mold, to satisfy certain particular requirement.U.S. Pat 2811757 discloses a kind of centrifugal casting casting mold, this casting mold comprises a base plate, casting mold assembly on base plate and the bindiny mechanism that base plate and casting mold assembly are connected as one, described casting mold assembly can be made of a pair of metal that cooperatively interacts, ceramic mould, carbonaceous type class castings.Yet this metal mold, ceramic mould, carbonaceous type are permanent type or semi-permanent mould, its processing difficulties, and the manufacturing cost height is to the bad adaptability of foundry goods variation.

One of purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, provides that a kind of manufacturing is simple, cost is low, foundry goods is changed adaptable centrifugal casting mould.

Two of purpose of the present invention provide a kind of make simple, cost is low, foundry goods is changed the manufacture method of adaptable centrifugal casting mould.

First purpose of the present invention is reached by following proposal:

A kind of casting mold that is used for vertical centrifugal casting, it comprises a base plate, include the casting mold assembly of die cavity, cross gate, sprue and the bindiny mechanism that casting mold assembly and base plate are connected as one on base plate, described casting mold assembly comprises that at least two can cooperatively interact together forming the castings of above-mentioned die cavity at least, and described castings is that the compound that is made of binding agent and refractory aggregate is through hardened forming.

Second purpose of the present invention reached by following proposal:

A kind of method of making the vertical centrifugal casting casting mold, it uses a base plate that can be connected with the upright rotating shaft of centrifugal casting machine, at first use the compound hardened forming castings that constitutes by binding agent and refractory aggregate, then the castings that hardens is assembled on above-mentioned base plate and includes die cavity, cross gate, directly water logical casting mold assembly, with bindiny mechanism casting mold assembly and base plate are connected as one again.

Casting mold of the present invention mainly by the compound of binding agent one refractory aggregate through hardened forming, and reproducible utilization, thus make simply, cost is low, the adaptability that foundry goods is changed is strong.

Reaching embodiment with reference to the accompanying drawings is further described the present invention.

Fig. 1 is the vertical centrifugal casting of the present invention cutaway view of casting mold along its rotation;

Fig. 2 is the cutaway view along A-A line among Fig. 1;

Fig. 3 is the cutaway view of another embodiment of casting mold of the present invention.

As shown in the figure, centrifugal casting mould of the present invention comprises a base plate 2, includes die cavity 9 on

base plate

2,10,11, the casting mold assembly of cross gate, sprue and bindiny mechanism that casting mold assembly and base plate 2 are connected as one, the casting mold assembly comprises at least two

castings

3,4,5,6 to form above-mentioned die cavity at least together that can cooperatively interact, and described castings is that the compound that is made of binding agent and refractory aggregate is through hardened forming.

Among the figure, described bindiny mechanism comprises a cover plate 8 and a pair of clamp 7, by them the casting mold assembly is pressed on the base plate 2, and certainly, bindiny mechanism meets other structures of goal of the invention.

Castings

3,4,5,6 has schematically shown four, and it is at least two, to form die cavity, cross gate or sprue betwixt.Castings has horizontal mating surface in the drawings, and mating surface longitudinally can certainly be arranged.The quantity of castings and therebetween the position of mating surface determine according to the factors such as shape of the quantity of disposal pouring foundry goods, foundry goods.

Base plate 2 can be parts that removably connect with the upright rotating shaft 1 of centrifugal casting machine, has the mechanism that can be connected with the upright rotating shaft of centrifugal casting machine in its bottom.For example, this bindiny mechanism can be a groove 12 that engages with above-mentioned upright rotating shaft.This detachable base plate is particularly suitable for the batch process of foundry goods.Certainly, base plate 2 also can be directly to be fixedly connected in the upright rotating shaft 1 of centrifugal casting machine.

The sprue of casting mold or cross gate can be formed by the castings that constitutes die cavity, also can be made of an independently fire-resistant insert.Fig. 3 shows a kind of embodiment that is made of sprue and part cross gate a fire-resistant insert 13.Concrete which kind of mode that adopts, those skilled in the art can determine according to situations such as foundry goods quantity, foundry goods shapes.

Die cavity in the casting mold along the rotation direction of casting mold and/or can be distributed with along the circumferencial direction that with the casting mold rotation is the center a plurality of, to improve the efficient of casting.

The used binding agent of casting mold of the present invention can be an organic binder bond, as phenolic resins, furfuryl alcohol resin and Lauxite etc., it also can be inorganic binder, as phosphate binders, sodium silicate binder, used refractory aggregate can be quartz sand, zircon sand, chromite sand, also can be shot.

Casting mold of the present invention can be by following method manufacturing:

But this method is used a base plate 2 that can be connected with the upright rotating shaft of centrifugal casting machine, it at first uses the compound hardened forming

castings

3,4,5,6 that is made of binding agent and refractory aggregate,

castings

3,4,5,6 with sclerosis is assembled into the casting mold assembly that includes die cavity, cross gate, sprue on base plate 2 then, with bindiny mechanism casting mold assembly and base plate 2 is connected as one again.

The casting mold of manufacturing can be installed on the vertical centrifugal casting machine or directly carry out pouring practice on the vertical centrifugal casting machine thus.

With combined type casting mold of the present invention can the centrifugal casting different shape ferrous metal and non-ferrous casting, characteristics of its collection sand casting, centrifugal casting are one, thereby provide a kind of novel casting method for foundry industry.

Claims

1, a kind of casting mold that is used for vertical centrifugal casting, it comprises a base plate (2) that can be connected with the upright rotating shaft of centrifugal casting machine, the casting mold assembly that includes die cavity, cross gate, sprue on base plate (2) and the bindiny mechanism that casting mold assembly and base plate (2) are connected as one, it is characterized in that, described casting mold assembly comprises at least two castings (3 to form above-mentioned die cavity at least together that can cooperatively interact, 4,5,6), described castings (3,4,5,6) be that the compound that is made of binding agent and refractory aggregate is through hardened forming.

2, casting mold according to claim 1 is characterized in that, described at least two castings (3,4,5,6) have laterally or mating surface longitudinally.

3, casting mold according to claim 2 is characterized in that, described base plate (2) is parts that removably connect with the upright rotating shaft of centrifugal casting machine, has the mechanism (12) that can be connected with the upright rotating shaft of centrifugal casting machine in the bottom of base plate (2).

4, casting mold according to claim 3 is characterized in that, described sprue can be made of an independently fire-resistant insert (13).

5, casting mold according to claim 3 is characterized in that, described die cavity is along the rotation direction of casting mold and/or be distributed with a plurality of along the circumferencial direction that with the casting mold rotation is the center.

According to the described casting mold of one of claim 1-5, it is characterized in that 6, described binding agent is an organic binder bond.

7, casting mold according to claim 6 is characterized in that, described organic binder bond is phenolic resins, furfuryl alcohol resin or Lauxite.

According to the described casting mold of one of claim 1-5, it is characterized in that 8, described binding agent is an inorganic binder.

9, casting mold according to claim 8 is characterized in that, described binding agent is phosphate binders or sodium silicate binder.

10, a kind of method of making vertical centrifugal casting with casting mold, this method is used a base plate (2) that can be connected with the upright rotating shaft of centrifugal casting machine, it is characterized in that, at first uses the compound hardened forming castings (3 that is made of binding agent and refractory aggregate, 4,5,6), then with the castings (3 that hardens, 4,5,6) on described base plate (2), be assembled into the casting mold assembly that includes die cavity, cross gate, sprue, with bindiny mechanism casting mold assembly and base plate (2) connected as one again.