Drawing method of EPS foam-epoxy resin composite die applied to sand casting

A technology of epoxy resin and sand casting, applied in epoxy resin glue, casting molding equipment, equipment for loosening the model, etc. Strength-enhancing effect

CN112111130APending Publication Date: 2020-12-22广西长城机械股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-12-22

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Abstract

The invention discloses a drawing method of an EPS foam-epoxy resin composite mold applied to sand mold casting. The drawing method comprises the following steps: S1, preparing an epoxy resin plate material with the thickness being 1-5mm; S2, manually splicing EPS foam plates to form a model with the maximum size required by the mold, and integrally feeding the model into an engraving machine forprocessing to obtain a mold sample; S3, cutting, polishing and sanding the epoxy resin plates according to the specific shape and size requirements of the parting surface of the mold sample to obtainepoxy resin reinforcing plates, and attaching the epoxy resin reinforcing plates to the drawing part of the mold by using an adhesive; and S4, during mold drawing, fixing the mold to a molding flat plate through vacuum adsorption equipment, jacking up a sand box and the sand mold through synchronous hydraulic equipment, so as to complete the mold drawing procedure. The epoxy resin reinforcing plate is additionally arranged on the molded surface of the EPS foam mold, mold drawing can be balanced, the stress point can be reinforced, the overall strength of the mold is improved, and the problemsthat the mold is prone to deformation and difficult to draw in the mold process are solved.
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Description

technical field

[0001] The invention belongs to the technical field of composite mold preparation, and in particular relates to a mold-drawing method for an EPS foam-epoxy resin composite mold applied to sand casting. Background technique

[0002] Sand casting is a casting method that produces castings in sand molds. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting. Because the molding materials used in sand casting are cheap and easy to obtain, the casting mold is easy to manufacture, and it can adapt to the single-piece production, batch production and mass production of castings. It has been the basic process in casting production for a long time.

[0003] At present, the mold materials used for casting and producing wear-resistant castings such as high manganese steel mainly include cast iron and wood. Metal molds and wooden molds have a long service life, the surface of casting products is smooth, and the post-processing is convenient; t...

Examples

Embodiment 1

[0039] A method for drawing out an EPS foam-epoxy resin composite mold applied to sand casting, comprising the following steps:

[0040] S1: Preparation of epoxy resin plate material:

[0041] a. Take the following raw materials by weight: bisphenol F type epoxy resin 3kg, bisphenol A type epoxy resin 10kg, E-51 epoxy resin 5kg, isophthalic unsaturated polyester resin 10kg, rush fiber powder 1kg, chitosan 1kg, oxalic acid 1kg, wheat straw powder 0.5kg, triphenylphosphine 0.01kg, dimethyl sulfoxide 10kg, stone powder 5kg, curing agent 5kg; Composition of raw materials: 3kg of quartz powder, 1kg of aluminum hydroxide powder, 0.5kg of marble powder; the curing agent is composed of the following raw materials: trimellitic anhydride 1kg, methyltetrahydrophthalic anhydride 1kg, N-(3,4-dichloro Phenyl)-N', N'-dimethylurea 2kg;

[0042]b. Mix oxalic acid, wheat straw powder, bisphenol F epoxy resin, bisphenol A epoxy resin, E-51 epoxy resin, and isophthalic unsaturated polyester res...

Embodiment 2

[0054] A method for drawing out an EPS foam-epoxy resin composite mold applied to sand casting, comprising the following steps:

[0055] S1: Preparation of epoxy resin plate material:

[0056] a. Take the following raw materials by weight: bisphenol F type epoxy resin 5kg, bisphenol A type epoxy resin 15kg, E-51 epoxy resin 8kg, isophthalic unsaturated polyester resin 12kg, rush fiber powder 3kg, chitosan 2kg, oxalic acid 2kg, wheat straw powder 1kg, triphenylphosphine 0.03kg, dimethyl sulfoxide 15kg, stone powder 7kg, curing agent 8kg; Composition: 3.5kg of quartz powder, 1.5kg of aluminum hydroxide powder, and 1kg of marble powder; the curing agent consists of raw materials including the following weights: 2kg of trimellitic anhydride, 2kg of methyltetrahydrophthalic anhydride, N-(3,4-dichloro Phenyl)-N', N'-dimethylurea 3.5kg;

[0057] b. Mix oxalic acid, wheat straw powder, bisphenol F epoxy resin, bisphenol A epoxy resin, E-51 epoxy resin, and isophthalic unsaturated po...

Embodiment 3

[0069] A method for drawing out an EPS foam-epoxy resin composite mold applied to sand casting, comprising the following steps:

[0070] S1: Preparation of epoxy resin plate material:

[0071] a. Take the following raw materials by weight: bisphenol F type epoxy resin 8kg, bisphenol A type epoxy resin 20kg, E-51 epoxy resin 10kg, isophthalic unsaturated polyester resin 15kg, rush fiber powder 5kg, chitosan 3kg, oxalic acid 3kg, wheat straw powder 1.4kg, triphenylphosphine 0.05kg, dimethyl sulfoxide 20kg, stone powder 10kg, curing agent 10kg; Composition of raw materials: 4kg of quartz powder, 2kg of aluminum hydroxide powder, 1.5kg of marble powder; the curing agent is composed of the following raw materials: 3kg of trimellitic anhydride, 3kg of methyltetrahydrophthalic anhydride, N-(3,4-dichloro Phenyl)-N', N'-dimethylurea 5kg;

[0072] b. Mix oxalic acid, wheat straw powder, bisphenol F epoxy resin, bisphenol A epoxy resin, E-51 epoxy resin, and isophthalic unsaturated pol...