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Heat insulation coating for mold dead head and use method thereof

A technology for thermal insulation coatings and molds, applied in coatings and other directions, can solve problems such as weak adhesion, poor thermal insulation effect, product shrinkage and porosity, and achieve the effects of reducing heat loss, low thermal conductivity, and avoiding casting defects

Inactive Publication Date: 2016-11-02
TIANJIN HANGYU METAL PROCESSING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The riser thermal insulation coatings sold in the market generally have weak adhesion and poor thermal insulation effect, which often causes shrinkage and porosity inside the product, which cannot meet customer requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 A kind of insulation coating for die riser, this coating component and mass percent are as follows:

[0016] Thermal insulation asbestos powder: 45%;

[0017] Calcium carbonate: 35%;

[0018] Bentonite suspending agent: 5%;

[0019] Water glass: 15%.

[0020] The present invention also provides a method for using the thermal insulation coating for the mold riser, comprising the following steps:

[0021] ① Pour the prepared paint into an appropriate amount of water and stir evenly;

[0022] ②, paint the paint on the riser of the mold;

[0023] ③. After the paint is applied, let it dry naturally.

Embodiment 2

[0024] Embodiment 2 A kind of insulation coating for die riser, this coating component and mass percent are as follows:

[0025] Thermal insulation asbestos powder: 60%;

[0026] Calcium carbonate: 25%;

[0027] Bentonite suspending agent: 9%;

[0028] Water glass: 6%.

[0029] The present invention also provides a method for using the thermal insulation coating for the mold riser, comprising the following steps:

[0030] ① Pour the prepared paint into an appropriate amount of water and stir evenly;

[0031] ②, paint the paint on the riser of the mold;

[0032] ③. After the paint is applied, let it dry naturally.

Embodiment 3

[0033] Embodiment 3 A kind of insulation coating for die riser, this coating component and mass percentage are as follows:

[0034] Thermal insulation asbestos powder: 56%;

[0035] Calcium carbonate: 25%;

[0036] Bentonite suspending agent: 13%;

[0037] Water glass: 6%.

[0038] The present invention also provides a method for using the thermal insulation coating for the mold riser, comprising the following steps:

[0039] ① Pour the prepared paint into an appropriate amount of water and stir evenly;

[0040] ②, paint the paint on the riser of the mold;

[0041] ③. After the paint is applied, let it dry naturally.

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PUM

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Abstract

The invention discloses a heat insulation coating for a mold dead head and a use method thereof. The heat insulation coating comprises, by mass, 45-60% of heat insulation asbestos powder, 25-35% of calcium carbonate, 5-13% of a bentonite suspending agent and 6-15% of sodium silicate. The use method comprises 1, pouring a proper amount of water into the prepared coating and carrying out uniform stirring, 2, brush-coating a mold dead head with the coating, and 3, carrying out natural air drying on the coating. The heat insulation asbestos powder has low thermal conductivity, a specific heat capacity 1 / 10 that of steel and thermal conductivity 1 / 100 that of steel. When the dead head is brush-coated with the coating with heat insulation asbestos powder as a main ingredient, an aluminum liquid heat loss at the dead head is effectively reduced. After casting mold filling is finished, when a casting starts to coagulate, the casting part is coagulated at first and then the dead head part is coagulated so that casting defects in the product are avoided.

Description

technical field [0001] The invention relates to the technical field of thermal insulation coatings, in particular to a thermal insulation coating for mold risers and a use method thereof. Background technique [0002] In the design of aluminum alloy molds, for the end of the product forming and the local thick part of the wall thickness, a riser is usually designed to feed the thick part or to discharge the aluminum liquid with oxidation inclusions that first enters the cavity out of the product forming position . In the production process, if the riser is solidified earlier than the product, it will cause the defect of shrinkage and porosity of the product. In order to ensure the cooling after the riser, it is necessary to paint the riser with good thermal insulation performance on the riser. The riser thermal insulation coatings sold on the market generally have weak adhesion and poor thermal insulation effect, which often causes shrinkage and porosity inside the product,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/12
CPCC09D1/00C09D7/61
Inventor 别云波
Owner TIANJIN HANGYU METAL PROCESSING