CN104493103A - Pre-embedding process of water pipe of sand casting household appliance liner mould - Google Patents

Abstract

The invention discloses a pre-embedding process of a water pipe of a sand casting household appliance liner mould. The pre-embedding process comprises the following steps: 1) manually bending a water pipe with a required size according to a pipeline on a household appliance liner model, wherein the water pipe is made of a copper pipe or stainless steel pipe with the diameter of 12mm or 14mm, the bending radius is not less than 40mm, the bending cross section is not less than 70 percent of the original size, and the length of a reserved connector is not less than 80mm; 2) before installing the water pipe, coating one layer of refractory mortar with a thickness of 0.2-5mm, then baking and drying in an oven for at least14 minutes at a temperature of 300 DEG C above, cooling after taking out, wherein because a thin film used by negative pressure casting can not bear a high temperature, the thin film is clamped on the pipeline according to a corresponding shape after being cooled, an end head of the water pipe is plugged by using a resin sand model, a connector position is reserved, and resin sand is fixed by using a rubber belt. The pre-embedding process is simple, achieves technological breakthrough of an embedded water pipe on the basis of a vacuum casting process, and is reserved when the quality of a casting is improved, thereby achieving the purpose of saving energy.

Description

The pre-buried technique of sand casting household electrical appliances die for inner water pipe

Technical field

The present invention relates to casting technology field, be specifically related to the pre-buried technique of a kind of sand casting household electrical appliances die for inner water pipe.

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.Traditional technological effect is not good, to be improved.

Summary of the invention

It is simple that technical problem to be solved by this invention is to provide a kind of method, the pre-buried technique of sand casting household electrical appliances die for inner water pipe of good heat-insulation effect.

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

The pre-buried technique of a kind of sand casting household electrical appliances die for inner water pipe, comprises following processing step:

1) according to the pipeline on household electrical appliances inner bag model, manually bend out the water pipe of required size, the material employing diameter of water pipe is copper pipe or the stainless steel tube of 12mm or 14mm, bending radius must not be less than 40 millimeters, bending sections must not amass and is less than full-sized 70%, and spare interface length must not be less than 80 millimeters;

2) one deck fire clay to be coated with before installation water pipe, thickness is at 0.2-5mm, then drying is toasted in an oven, temperature at least more than 300 DEG C toasts 15 minutes, cooling after taking out, because the film that negative pressure casting uses cannot bear high temperature, be stuck on pipeline according to corresponding shape after cooling, water pipe termination resin sand model is blocked, spare interface position, with adhesive tape fixing resin sand;

Above-mentioned fire clay is made up of the component of following parts by weight: sepiolite powder 25 parts, 5 parts, carbon fiber, expanded graphite 5 parts, graphene microchip 2 parts, 2 parts, soil paint, modified clay 5 parts, palm oil 2 parts, 3 parts, carborundum, amorphous silicon di-oxide 5 parts, deionized water 50 parts, paeonolide 2 parts, zirconia 2 parts, ooze 5 parts, nanometer anion powder 2 parts, silicon nitride 2 parts, boron nitride 2 parts, boric acid aqueous solution 2 parts, nano titanium oxide 1 part, vermiculite power 2 parts, magnesia 2 parts, calcined kaolin 5 parts, selenium powder 2 parts, its preparation method is as follows:

1) by said components mixing and stirring, ball mill is dropped into;

2) ball mill grinding, about 4 hours, whether residual grains or caking were filtered in test;

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

4) pack.

The preparation method of above-mentioned modified clay is:

1) sending in grinder by lumpy clay, is under the condition of 180 revs/min at rotating speed, continuous ball milling 4 hours, crosses 200 mesh sieves and obtains powder;

2) in stainless steel heating tank, add powder and water drop into by weight the ratio of 1:1.5, then stainless steel heating tank is closed;

3) heated raw material by stainless steel heating tank, heat while stirring, its mixing speed controls at 120 revs/min, after being heated with stirring to 155 DEG C-165 DEG C, stops heating, and continues to stir 60-65 minute;

4) will add the powder suction after thermal agitation on the freezing bed of stainless steel, close freezing 12 hours, cryogenic temperature is-6 DEG C;

5) on freezing bed, refrigerate 24 hours under keeping 0 DEG C of-2 DEG C of condition, make its crystallization retrogradation, make hydrone from powder, analyse drench out;

6) the powder block after analysing drench hydrone in step 4 is placed on 120 DEG C to dry in pincers pots and dry, makes its moisture within 10%;

7) by step 6) in the powder block of drying utilize ball mill to be milled to 400 orders to obtain modified clay.

The invention has the beneficial effects as follows:

1) present invention process method is simple, on the basis of vacuum casting process, achieves the research of technique of pre-buried water pipe, remains this technique, achieve energy-conservation object while raising casting quality;

2) by improving the formula of fire clay, the fire clay of one deck specific thickness to be coated with at pre-buried copper pipe or stainless steel tube, the heat insulation effect preventing softening and prevent aluminium liquid circulation copper pipe from entering pipeline can be played.

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 specific embodiment, setting forth the present invention further.

The pre-buried technique of a kind of sand casting household electrical appliances die for inner water pipe, comprises following processing step:

1) according to the pipeline on household electrical appliances inner bag model, manually bend out the water pipe of required size, the material employing diameter of water pipe is copper pipe or the stainless steel tube of 12mm or 14mm, bending radius must not be less than 40 millimeters, bending sections must not amass and is less than full-sized 70%, and spare interface length must not be less than 80 millimeters;

2) one deck fire clay to be coated with before installation water pipe, thickness is at 0.2-5mm, then drying is toasted in an oven, temperature at least more than 300 DEG C toasts 15 minutes, cooling after taking out, because the film that negative pressure casting uses cannot bear high temperature, be stuck on pipeline according to corresponding shape after cooling, water pipe termination resin sand model is blocked, spare interface position, with adhesive tape fixing resin sand;

Above-mentioned fire clay is made up of the component of following parts by weight: sepiolite powder 25 parts, 5 parts, carbon fiber, expanded graphite 5 parts, graphene microchip 2 parts, 2 parts, soil paint, modified clay 5 parts, palm oil 2 parts, 3 parts, carborundum, amorphous silicon di-oxide 5 parts, deionized water 50 parts, paeonolide 2 parts, zirconia 2 parts, ooze 5 parts, nanometer anion powder 2 parts, silicon nitride 2 parts, boron nitride 2 parts, boric acid aqueous solution 2 parts, nano titanium oxide 1 part, vermiculite power 2 parts, magnesia 2 parts, calcined kaolin 5 parts, selenium powder 2 parts, its preparation method is as follows:

1) by said components mixing and stirring, ball mill is dropped into;

2) ball mill grinding, about 4 hours, whether residual grains or caking were filtered in test;

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

4) pack.

The preparation method of above-mentioned modified clay is:

1) sending in grinder by lumpy clay, is under the condition of 180 revs/min at rotating speed, continuous ball milling 4 hours, crosses 200 mesh sieves and obtains powder;

2) in stainless steel heating tank, add powder and water drop into by weight the ratio of 1:1.5, then stainless steel heating tank is closed;

3) heated raw material by stainless steel heating tank, heat while stirring, its mixing speed controls at 120 revs/min, after being heated with stirring to 155 DEG C-165 DEG C, stops heating, and continues to stir 60-65 minute;

4) will add the powder suction after thermal agitation on the freezing bed of stainless steel, close freezing 12 hours, cryogenic temperature is-6 DEG C;

5) on freezing bed, refrigerate 24 hours under keeping 0 DEG C of-2 DEG C of condition, make its crystallization retrogradation, make hydrone from powder, analyse drench out;

6) the powder block after analysing drench hydrone in step 4 is placed on 120 DEG C to dry in pincers pots and dry, makes its moisture within 10%;

7) by step 6) in the powder block of drying utilize ball mill to be milled to 400 orders to obtain modified clay.

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. the pre-buried technique of sand casting household electrical appliances die for inner water pipe, is characterized in that, comprises following processing step:

1) according to the pipeline on household electrical appliances inner bag model, manually bend out the water pipe of required size, the material employing diameter of water pipe is copper pipe or the stainless steel tube of 12mm or 14mm, bending radius must not be less than 40 millimeters, bending sections must not amass and is less than full-sized 70%, and spare interface length must not be less than 80 millimeters;

2) one deck fire clay to be coated with before installation water pipe, thickness is at 0.2-5mm, then drying is toasted in an oven, temperature at least more than 300 DEG C toasts 15 minutes, cooling after taking out, be stuck on pipeline according to corresponding shape after cooling, water pipe termination resin sand model is blocked, spare interface position, with adhesive tape fixing resin sand;

Above-mentioned fire clay is made up of the component of following parts by weight: sepiolite powder 25 parts, 5 parts, carbon fiber, expanded graphite 5 parts, graphene microchip 2 parts, 2 parts, soil paint, modified clay 5 parts, palm oil 2 parts, 3 parts, carborundum, amorphous silicon di-oxide 5 parts, deionized water 50 parts, paeonolide 2 parts, zirconia 2 parts, ooze 5 parts, nanometer anion powder 2 parts, silicon nitride 2 parts, boron nitride 2 parts, boric acid aqueous solution 2 parts, nano titanium oxide 1 part, vermiculite power 2 parts, magnesia 2 parts, calcined kaolin 5 parts, selenium powder 2 parts,

Above-mentioned fire clay preparation method is as follows:

1) by said components mixing and stirring, ball mill is dropped into;

2) ball mill grinding, about 4 hours, whether residual grains or caking were filtered in test;

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

4) pack.

2. the pre-buried technique of sand casting household electrical appliances die for inner water pipe according to claim 1, is characterized in that: the preparation method of above-mentioned modified clay is:

1) sending in grinder by lumpy clay, is under the condition of 180 revs/min at rotating speed, continuous ball milling 4 hours, crosses 200 mesh sieves and obtains powder;

2) in stainless steel heating tank, add powder and water drop into by weight the ratio of 1:1.5, then stainless steel heating tank is closed;

3) heated raw material by stainless steel heating tank, heat while stirring, its mixing speed controls at 120 revs/min, after being heated with stirring to 155 DEG C-165 DEG C, stops heating, and continues to stir 60-65 minute;

4) will add the powder suction after thermal agitation on the freezing bed of stainless steel, close freezing 12 hours, cryogenic temperature is-6 DEG C;

5) on freezing bed, refrigerate 24 hours under keeping 0 DEG C of-2 DEG C of condition, make its crystallization retrogradation, make hydrone from powder, analyse drench out;

6) the powder block after analysing drench hydrone in step 4 is placed on 120 DEG C to dry in pincers pots and dry, makes its moisture within 10%;

7) by step 6) in the powder block of drying utilize ball mill to be milled to 400 orders to obtain modified clay.