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A kind of tin bronze lost foam casting environmental protection coating and preparation method thereof

A technology of lost foam casting and environmentally friendly coatings, which is applied to casting molding equipment, coatings, casting molds, etc. It can solve the problems of affecting the strength of coatings and poor air permeability of coatings, and achieve good mechanical strength, good leveling performance, and good air permeability. Effect

Active Publication Date: 2022-04-08
ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: the existing coatings have poor gas permeability, and the addition of porous materials affects the coating strength after coating and sintering

Method used

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  • A kind of tin bronze lost foam casting environmental protection coating and preparation method thereof
  • A kind of tin bronze lost foam casting environmental protection coating and preparation method thereof
  • A kind of tin bronze lost foam casting environmental protection coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: prepare tin bronze lost foam casting environmental protection coating as follows:

[0022] (A) Weigh resorcinol, terephthalaldehyde and triblock polymer F127 according to the mass ratio of 0.5:3:1 and carry out vacuum grinding and mixing. The total weight of formaldehyde and F127 is 30% of water, fully grind and mix to 150 mesh to obtain porogen, and store in a dry environment; because resorcinol has a strong moisture absorption capacity, it needs to be ground in a dry vacuum environment to prevent grinding Water absorption during the process leads to excess moisture affecting the self-assembly of the porogen.

[0023] (B) The proportion of the refractory substrate is as follows: 10wt% mica, 20%wt% diatomaceous earth, 70wt% bauxite; the refractory substrate is ground and mixed and passed through a 200-mesh sieve.

[0024] Selection of refractory base material

[0025] When casting tin bronze, oxides will be produced on the surface during pouring. These p...

Embodiment 2

[0035]Embodiment 2: prepare tin bronze lost foam casting environmental protection coating as follows:

[0036] (A) Weigh resorcinol, terephthalaldehyde and triblock polymer F127 according to the mass ratio of 5:10:1, then carry out vacuum grinding and mixing, and add resorcinol, terephthalmic acid The total weight of formaldehyde and F127 is 40% water, fully grind and mix to 200 mesh to obtain porogen, and store in a dry environment; because resorcinol has a strong moisture absorption capacity, it needs to be ground in a dry vacuum environment to prevent grinding Water absorption during the process leads to excess moisture affecting the self-assembly of the porogen.

[0037] (B) The proportioning of the refractory substrate is as follows: 20wt% mica, 30wt% diatomite, 50wt% bauxite; the refractory substrate is ground and mixed and passed through a 200-mesh sieve.

[0038] (C) Take by weighing 100 parts by weight of refractory substrate, 3 parts by weight of sodium bentonite, 0...

Embodiment 3

[0040] Embodiment 3: prepare tin bronze lost foam casting environmental protection coating as follows:

[0041] (A) Weigh resorcinol, terephthalaldehyde and triblock polymer F127 according to the mass ratio of 2.5:4:1 and carry out vacuum grinding and mixing. The total weight of formaldehyde and F127 is 35% water, fully grind and mix to 150 mesh to obtain porogen, and store in a dry environment; because resorcinol has a strong moisture absorption capacity, it needs to be ground in a dry vacuum environment to prevent grinding Water absorption during the process leads to excess moisture affecting the self-assembly of the porogen.

[0042] (B) The proportion of the refractory substrate is as follows: 15wt% mica, 25wt% diatomaceous earth, 60wt% bauxite; grind and mix the refractory substrate and pass through a 200-mesh sieve.

[0043] (C) Weigh 100 parts by weight of refractory substrate, 2.5 parts by weight of sodium bentonite, 0.3 parts by weight of CMC, 4 parts by weight of si...

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Abstract

The invention discloses an environmentally friendly coating for tin bronze lost foam casting and a preparation method thereof, which comprises 100 parts by weight of a refractory substrate, 2 to 3 parts by weight of sodium bentonite, 0.3 parts by weight of CMC, 3-5 parts by weight of silica sol, and 0.05 parts by weight of PAM parts by weight, 50 to 80 parts by weight of water, 0.4 to 1.5 parts by weight of JFC, 1 to 3 parts by weight of SPA-202, 0.1 to 0.5 parts by weight of thymol, and 20 to 40 parts by weight of a porogen, which is in During the drying process, self-assembly forms an ordered structure, which is convenient for the carbonization of the coating to form orderly arranged pores when the coating is sintered at high temperature. The penetration of the pores is conducive to the discharge of gaseous and liquid decomposition products. It also ensures the stability of the ordered pore structure and does not collapse, so the mechanical strength of the coating is better no matter after drying or sintering.

Description

technical field [0001] The invention relates to the field of casting coatings, in particular to an environmental protection coating for tin bronze lost foam casting and a preparation method thereof. Background technique [0002] The basic principle of lost foam casting is: apply a refractory coating layer on the foamed plastic pattern with similar casting shape, put it in the sand box, fill the surroundings of the pattern with dry sand, vibrate to make it compact, and then pour metal It is a new type of casting method in which the foam plastic is pyrolyzed and disappears under the heat of the high-temperature metal liquid, so that the metal liquid is filled into the space where the foam plastic film disappears to complete the mold filling. As a new type of casting method, lost foam casting has better characteristics than other casting methods: (1) The casting has high precision and low surface roughness. (2) The degree of freedom of design is large. (3) The process is rela...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C3/00
CPCB22C3/00
Inventor 柴知章臧影
Owner ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE