CN104588619A - Cold iron block for aluminum alloy casting embedded pipe of vacuum casting household appliance mold - Google Patents

Abstract

The invention provides a cold iron block for an aluminum alloy casting embedded pipe of a vacuum casting household appliance mold. The cold iron block is installed in the pipe between an upper box and a lower box of the mold and comprises a cold iron block body with a hook. The surface of the cold iron block body is coated with cold iron paint. The cold iron block body is provided with a clamping groove. The hook is arranged in the middle of the clamping groove and connected with an iron wire which is wound around a water pipe. The iron wire position fixing effect, the displacement prevention effect and the effect of cold iron are achieved through the cold iron block. The whole pipe is fully provided with the cold iron blocks at intervals ranging from 100 mm to 150 mm and the iron wires are conveniently inserted in a sand mold. Expanded graphite is selected to form a paint framework, the surface of the cold iron is coated with the expanded graphite, and it is guaranteed that the paint of a large and thick casting can not crack under the high-temperature shock heating condition.

Description

Vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe frozen iron blocks

Technical field

The present invention relates to casting technology field, be specifically related to a kind of vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe frozen iron blocks and determine frock.

Background technology

Household electrical appliances die for inner is the one of vacuum plastics sucking moulding, and ABS plastic, by heating mould, is then softened plastics sucking moulding by refrigerator producer.The heating of mould is realized by the water pipe be embedded in inside aluminium alloy castings, and circulate hot water in water pipe, realizes controlling the temperature of unitary mould by control discharge and temperature.

At present, general employing Sand Moulding Process casting household electrical appliances die for inner, water pipe pre-buried, by making tube seat in advance on sand mold, then the shape of tube seat is worked it out by moulding, the copper pipe bent according to tube seat size in advance or stainless steel tube are placed in tube seat, by using the iron wire pipe clamp of U-shaped, pipeline is fixed, then block with the two ends of damp sand by pipeline, reserve interface position, pre-buried copper pipe or stainless steel tube will scribble one deck graphite, play the heat insulation effect preventing softening and prevent aluminium liquid circulation copper pipe from entering pipeline.

Summary of the invention

It is higher that technical problem to be solved by this invention is to provide a kind of mechanization degree, and reduce labour intensity, the vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe frozen iron blocks of improving the quality of products determines frock.

Technical problem to be solved by this invention realizes by the following technical solutions:

A kind of vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe frozen iron blocks determines frock, be arranged in the pipeline between mould top box and nowel, comprise one piece of frozen iron blocks with hook, described frozen iron blocks is provided with a draw-in groove, described hook is arranged on the middle part of draw-in groove, described hook is connected with iron wire, this iron wire is responsible for being wrapped on water pipe, frozen iron blocks serves fixing iron wire position, prevents the effect of displacement and chill, this frock is booked whole pipeline, by iron wire to insert in sand mold according to 100 ~ 150 millimeters of each distances;

Described notch is U-shaped structure, is stuck in the high spot of tube seat.

Described frozen iron blocks surface is coated with chill coating, is made up of the component of following mass fraction: expanded graphite 30 parts, rare earth oxide 10 parts, 5 parts, carborundum, polyacrylamide 4 parts, ceramic powder 5 parts, ethylene glycol 5 parts, Tourmaline 2 parts, titanium dioxide 5 parts, pigment 5 parts, deionized water 30 parts, lead orthoplumbate 2 parts, active carbon 3 parts, chloroplatinic acid 2 parts, modified corn starch 5 parts, sepiolite powder 0.5 part, silicon nitride 2 parts, boron nitride 2 parts.

Preparation method is as follows:

1) take each component by said ratio, and mix thoroughly;

2) by step 2) in mix thoroughly after material send into ball mill grinding, about 4 hours, whether residual grains or caking are filtered in test;

3), after shutting down, No. 2, rock field cup test dilution 10 ± 1S standard is adopted;

4) pack.

The invention has the beneficial effects as follows: the present invention chooses expanded graphite as coating skeleton, is coated in chill surface, ensure that thick and large casting high temperature swashs the lower coating cracking of heat, meanwhile, for preventing bleb, plus silicon carbide and boron nitride; This coating has good wetability, improves the normal temperature of coating, elevated temperature strength and rigidity, effectively avoids chill position to occur spoken parts in traditional operas, reduces casting defect, in castings production in enormous quantities, improves casting yield, low cost of manufacture.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

Fig. 2 is mounting structure figure of the present invention;

Detailed description of the invention

The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.

See Fig. 1-2:

A kind of vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe frozen iron blocks determines frock, be arranged in the pipeline between mould top box and nowel, comprise one piece of frozen iron blocks 1 with hook 3, frozen iron blocks 1 is provided with a draw-in groove, hook 3 is arranged on the middle part of draw-in groove, hook 3 is connected with iron wire 2, this iron wire 2 is responsible for being wrapped on water pipe 4, frozen iron blocks 1 serves fixing iron wire 2 position, prevents the effect of displacement and chill, this frock is booked whole pipeline, by iron wire 2 to insert in sand mold according to 100 ~ 150 millimeters of each distances; Notch is U-shaped structure, is stuck in the high spot of tube seat.

Frozen iron blocks 1 surface is coated with chill coating, is made up of the component of following mass fraction: expanded graphite 30 parts, rare earth oxide 10 parts, 5 parts, carborundum, polyacrylamide 4 parts, ceramic powder 5 parts, ethylene glycol 5 parts, Tourmaline 2 parts, titanium dioxide 5 parts, pigment 5 parts, deionized water 30 parts, lead orthoplumbate 2 parts, active carbon 3 parts, chloroplatinic acid 2 parts, modified corn starch 5 parts, sepiolite powder 0.5 part, silicon nitride 2 parts, boron nitride 2 parts.

Preparation method is as follows:

1) take each component by said ratio, and mix thoroughly;

2) by step 2) in mix thoroughly after material send into ball mill grinding, about 4 hours, whether residual grains or caking are filtered in test;

3), after shutting down, No. 2, rock field cup test dilution 10 ± 1S standard is adopted;

4) pack.

More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.

Claims (2)

1. a vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe frozen iron blocks, be arranged in the pipeline between mould top box and nowel, it is characterized in that: comprise one piece of frozen iron blocks with hook, described frozen iron blocks is provided with a draw-in groove, described hook is arranged on the middle part of draw-in groove, described hook is connected with iron wire, and this iron wire is responsible for being wrapped on water pipe; Described frozen iron blocks surface is coated with chill coating, is made up of the component of following mass fraction: expanded graphite 30 parts, rare earth oxide 10 parts, 5 parts, carborundum, polyacrylamide 4 parts, ceramic powder 5 parts, ethylene glycol 5 parts, Tourmaline 2 parts, titanium dioxide 5 parts, pigment 5 parts, deionized water 30 parts, lead orthoplumbate 2 parts, active carbon 3 parts, chloroplatinic acid 2 parts, modified corn starch 5 parts, sepiolite powder 0.5 part, silicon nitride 2 parts, boron nitride 2 parts;

Preparation method is as follows:

1) take each component by said ratio, and mix thoroughly;

2) by step 2) in mix thoroughly after material send into ball mill grinding, 4 hours, whether residual grains or caking are filtered in test;

3), after shutting down, No. 2, rock field cup test dilution 10 ± 1S standard is adopted;

4) pack.

2. vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe frozen iron blocks according to claim 1, is characterized in that: described notch is U-shaped structure, is stuck in the high spot of tube seat.