CN103567373A - Binder for casting core model - Google Patents

Abstract

The invention relates to a resin material, in particular to a binder for a casting core model. The binder is prepared from the following raw materials in parts by weight: 40-60 parts of phenolic resin, 10-30 parts of aliphatic ester, 5-8 parts of alkyl ester silicate, 20-30 parts of trimethylol triacrylate and 40-45 parts of cumene hydroperoxide. The binder for the casting core model is added into casting aggregate for mixing to prepare casting resin sand, the casting resin sand is used for manufacture the core model of metal casting, and the intensity of the casting resin sand can be significantly increased.

Description

Cast moulding core binding agent

technical field

The present invention relates to resin material, relate more specifically to a kind of binding agent for cast moulding core.

Background technology

In casting technique, what cold-box process was conventional is SO2 method, but the sclerosis of SO2 air blowing is at present unstable with binding agent, is easily subject to ambient influnence, under damp and hot environment, can cause mechanical strength of resin to reduce, and poor toughness.Resin index declines, while causing iron and steel casting, and the unfavorable condition such as easily produce sand washing, burning into sand, scab.

Summary of the invention

For above-mentioned technical problem, the invention provides a punching and can overcome the poor shortcoming of humidity resistance of cold-box binder for SO2 method in prior art, the present invention solves the technical scheme that its technical problem takes and is:

Cast moulding core binding agent, is prepared according to parts by weight by following raw material,

40～60 parts, phenolic resins, 10～30 parts of fatty acid esters, 5～8 parts of alkyl silicates, 20～30 parts of tri methylol triacrylates, 40～45 parts of cumyl hydroperoxides.

The production technology of this cast moulding core binding agent is as follows:

(1) by phenolic resins heat fused in reactor, under vacuum state, dewater;

(2) be cooled to 80 ℃, add fatty acid ester, stir and carry out insulation reaction 3-5 hours;

(3) after reaction finishes, add alkyl silicate, be incubated 3-5 hours after being heated to 110 ℃;

(4) cool to 60 ℃, tri methylol triacrylate, cumyl hydroperoxide acrylate are added to stir within 2-3 hours, mix, i.e. the cast moulding core binding agent of system.

Cast moulding core binding agent provided by the invention joins in casting aggregate and mixes, the casting resin sand of system, and for the manufacture of the core mould of cast metal foundry goods, can be so that casting resin sand intensity significantly improves.

The specific embodiment

The specific embodiment of the present invention is described in conjunction with the embodiments.

Embodiment 1

Cast moulding core binding agent, is prepared according to parts by weight by following raw material,

48 parts, phenolic resins, 12 parts of fatty acid esters, 8 parts of alkyl silicates, 30 parts of tri methylol triacrylates, 42 parts of cumyl hydroperoxides.

The production technology of this cast moulding core binding agent is as follows:

(1) by phenolic resins heat fused in reactor, under vacuum state, dewater;

(2) be cooled to 80 ℃, add fatty acid ester, stir and carry out insulation reaction 4 hours;

(3) after reaction finishes, add alkyl silicate, be incubated 4 hours after being heated to 110 ℃;

(4) cool to 60 ℃, tri methylol triacrylate, cumyl hydroperoxide acrylate are added to stir within 2 hours, mix, i.e. the cast moulding core binding agent of system.

Embodiment 2

Cast moulding core binding agent, is prepared according to parts by weight by following raw material,

60 parts, phenolic resins, 30 parts of fatty acid esters, 6 parts of alkyl silicates, 27 parts of tri methylol triacrylates, 40 parts of cumyl hydroperoxides.

The production technology of this cast moulding core binding agent is as follows:

(1) by phenolic resins heat fused in reactor, under vacuum state, dewater;

(2) be cooled to 80 ℃, add fatty acid ester, stir and carry out insulation reaction 5 hours;

(3) after reaction finishes, add alkyl silicate, be incubated 5 hours after being heated to 110 ℃;

(4) cool to 60 ℃, tri methylol triacrylate, cumyl hydroperoxide acrylate are added to stir within 3 hours, mix, i.e. the cast moulding core binding agent of system.

Embodiment 3

Cast moulding core binding agent, is prepared according to parts by weight by following raw material,

40 parts, phenolic resins, 10 parts of fatty acid esters, 5 parts of alkyl silicates, 20 parts of tri methylol triacrylates, 45 parts of cumyl hydroperoxides.

The production technology of this cast moulding core binding agent is as follows:

(1) by phenolic resins heat fused in reactor, under vacuum state, dewater;

(2) be cooled to 80 ℃, add fatty acid ester, stir and carry out insulation reaction 3 hours;

(3) after reaction finishes, add alkyl silicate, be incubated 3 hours after being heated to 110 ℃;

(4) cool to 60 ℃, tri methylol triacrylate, cumyl hydroperoxide acrylate are added to stir within 2 hours, mix, i.e. the cast moulding core binding agent of system.

Claims (2)

1. cast moulding core binding agent, is characterized in that: by following raw material, according to parts by weight, prepared,

40～60 parts, phenolic resins, 10～30 parts of fatty acid esters, 5～8 parts of alkyl silicates, 20～30 parts of tri methylol triacrylates, 40～45 parts of cumyl hydroperoxides.

2. cast moulding core binding agent according to claim 1, is characterized in that: the production technology of this cast moulding core binding agent is as follows:

(1) by phenolic resins heat fused in reactor, under vacuum state, dewater;

(2) be cooled to 80 ℃, add fatty acid ester, stir and carry out insulation reaction 3-5 hours;

(3) after reaction finishes, add alkyl silicate, be incubated 3-5 hours after being heated to 110 ℃;

(4) cool to 60 ℃, tri methylol triacrylate, cumyl hydroperoxide acrylate are added to stir within 2-3 hours, mix, i.e. the cast moulding core binding agent of system.