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Lost foam casting coating for gray cast iron and preparation method of lost foam casting coating

A technology of lost foam and gray cast iron, which is applied to casting molding equipment, coatings, casting molds, etc. It can solve the problems of sand sticking in castings, and achieve the effect of cost reduction and cost increase

Inactive Publication Date: 2015-05-20
SHIJIAZHUANG MANDINGFU CASTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lost foam coating prepared by the above formula and preparation method has sand sticking phenomenon in the casting, especially in the thick wall part.

Method used

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  • Lost foam casting coating for gray cast iron and preparation method of lost foam casting coating
  • Lost foam casting coating for gray cast iron and preparation method of lost foam casting coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0033] Example 1 A lost foam coating for gray cast iron and its preparation method

[0034] A lost foam coating for gray cast iron, which comprises the following raw materials:

[0035] Quartz powder 84 kg, mica powder 6 kg, vermiculite powder 2 kg, attapulgite 4 kg,

[0036] Recover 4 kg of pellet dust, 0.5 kg of latex powder, 0.8 kg of dextrin,

[0037] Carboxymethylcellulose sodium 1.0 kg, sodium bentonite 1.5 kg, sodium hexametaphosphate 0.5 kg,

[0038] Sodium tripolyphosphate 1.0 kg, organosilicon 0.1 kg, zinc oxide 0.02 kg, sodium benzoate 0.06 kg.

[0039] Its preparation method is carried out according to the following sequence of steps:

[0040] (1) Preparation of aggregate: First, add quartz powder, mica powder, vermiculite powder, attapulgite, and recovered dust into the mixing elevator in sequence, and carry out automatic lifting and stirring three times. The time for each automatic lifting and stirring is 12 minutes , and finally aggregates are obtained.

...

Embodiment 2-6

[0044] Example 2-6 Lost foam coating for gray cast iron and preparation method thereof

[0045] Examples 2-6 are respectively a kind of lost foam coating for gray cast iron and its preparation method, which are similar to the raw materials and preparation method of Example 1, except that the amount of raw materials and the preparation parameters involved in the preparation method are different. The details are shown in the following table:

[0046] The raw material composition and the technical parameters involved in the preparation method of the aggregate in the table 1 embodiment 2-6

[0047]

[0048] The preparation parameters involved in the consumption of raw materials and preparation method in table 2 embodiment 2-6

[0049]

[0050] The lost foam coatings for gray cast iron prepared in Examples 2-6 can make high-temperature gas discharge from the coating rapidly and almost invariably when pouring thick-walled castings, and reduce carbon black and pore defects t...

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PUM

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Abstract

The invention discloses a lost foam casting coating for gray cast iron and a preparation method of the lost foam casting coating. The lost foam casting coating comprises an aggregate, a binder, a suspending agent, a surfactant, a defoaming agent, water and a preservative, wherein recovered pill-cleaning dust is adopted as one part of the aggregate; the finally prepared coating is good in air permeability; a high-temperature gas can be rapidly and almost invariantly discharged out of a coat when a thick-walled casting is poured; carbon black and blowhole defects are reduced to the minimal extent; in addition, absence of an adhesive sand defect is also ensured; the lost foam casting coating can be mixed evenly by the preparation method disclosed by the invention; and later use is facilitated. The lost foam casting coating is suitable for preparation of the lost foam casting coating.

Description

technical field [0001] The invention belongs to the field of casting, and relates to a coating and a preparation method thereof, in particular to a lost foam coating for gray cast iron and a preparation method thereof. Background technique [0002] Lost foam casting (also known as full mold casting) is to brush the foam model (or several pieces bonded to form a model cluster) with the same shape as the casting, brush the refractory coating and dry it, and then bury it in dry quartz sand for vibration molding. Press down and pour to vaporize the model, liquid metal occupies the position of the model, solidifies and cools to form a new casting method. [0003] Most of the lost foam coatings for gray cast iron in the prior art are composed of quartz powder, graphite powder, sodium bentonite, water-soluble phenolic resin, sodium carboxymethyl cellulose, polyvinyl acetate emulsion, OP-10, n-octanol and water. The preparation method is to soak sodium bentonite and sodium carboxym...

Claims

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Application Information

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IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 安拴江崔景敏安志冬程军意
Owner SHIJIAZHUANG MANDINGFU CASTING CO LTD
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