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Production process of lost foam plate by using STMMA material

A technology of production process and template material, which is applied in the field of production process of disappearing formwork material, can solve problems such as insufficient compactness, long production process cycle, and gaps in the plate, and achieve the effects of compact internal structure, shortened production cycle, and improved quality

Inactive Publication Date: 2021-06-11
WUHU GUANFENG MOLD PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production process of disappearing formwork generally chooses raw materials with a particle size of 0.8mm or more when selecting raw materials, resulting in the formed plate due to the large diameter of the raw material, there will be gaps inside the plate, and the plate is not tight enough; and the cycle of the existing plate production process is longer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The production process of the present invention includes the following steps: (1) material selection, using a template to screen STMMA with a diameter of 0.23mm as the original beads. (2) Pre-foaming, the original beads are added to the intermittent pre-foaming machine for pre-foaming, the pressure of the pre-foaming machine is 0.03Mpa, the pre-foaming temperature is 120 ° C, steam enters the pre-foaming machine, The steam pressure is 0.9Mpa, and the original beads are stirred for 200s to make the original beads to be expanded reach a plastic state and then foamed. The pre-expanded time is 90s to obtain pre-expanded beads. (3) Aging, the pre-expanded beads are aged, the aging temperature is 30° C., and the aging time is 16 hours, so that the pre-expanded beads are stable, and the aged beads are obtained. (4) Molding, send the matured beads into the molding machine through the blower, close the mold after the mold cavity is filled with matured beads, vacuum treatment, th...

Embodiment 2

[0023] The production process of the present invention includes the following steps: (1) material selection, using a template to screen STMMA with a diameter of 0.24mm as the original beads. (2) Pre-foaming, the original beads are added to the intermittent pre-foaming machine for pre-foaming, the pressure of the pre-foaming machine is 0.04Mpa, the pre-foaming temperature is 123 ° C, steam enters the pre-foaming machine, The steam pressure is 1.0Mpa, and the original beads are stirred for 208s to make the original beads to be expanded reach a plastic state and then foamed. The pre-expanded time is 98s to obtain pre-expanded beads. (3) Aging, the pre-expanded beads are aged, the aging temperature is 32° C., and the aging time is 18 hours, so that the pre-expanded beads are stable, and the aged beads are obtained. (4) Molding, the mature beads are sent into the molding machine through the blower, after the mold cavity is filled with mature beads, the mold is closed, vacuum treatm...

Embodiment 3

[0025] The production process of the present invention includes the following steps: (1) material selection, using a template to screen STMMA with a diameter of 0.24mm as the original beads. (2) Pre-foaming, the original beads are added to the intermittent pre-foaming machine for pre-foaming, the pressure of the pre-foaming machine is 0.04Mpa, the pre-foaming temperature is 125 ° C, steam enters the pre-foaming machine, The steam pressure is 1.0Mpa, and the original beads are stirred for 215s to make the original beads to be expanded reach a plastic state and then foamed. The pre-expanded time is 105s to obtain pre-expanded beads. (3) Aging, the pre-expanded beads are aged, the aging temperature is 33° C., and the aging time is 21 hours, so that the pre-expanded beads are stable, and the aged beads are obtained. (4) Molding, send the matured beads into the molding machine through the blower, close the mold after the mold cavity is filled with matured beads, vacuum treatment, t...

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PUM

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Abstract

The invention discloses a production process of a lost foam plate by using an STMMA material, and relates to the technical field of lost foams. The production process comprises the following steps of (1) material selection, specifically, using a template to screen STMMA with the diameter of 0.23-0.25 mm as original beads; (2) pre-foaming to obtain pre-foamed beads; (3) curing to obtain cured beads; (4) forming to obtain a plate semi-finished product; (5) cooling; (6) drying to obtain a plate finished product. and (7) quality inspection and packaging. By means of the production process, the STMMA with the diameter of 0.23 mm-0.25 mm is screened as the original beads by using the newly designed template, so that the internal structure of the plate finished product is compact, the surface of the plate finished product is smooth, and the quality of the plate finished product is improved; and the plate production process is improved, so that the production period is shortened, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of lost foam, in particular to a production process of lost foam using STMMA material. Background technique [0002] Lost foam casting is to bond and combine paraffin or foam models similar in size and shape to castings to form model clusters. After brushing refractory paint and drying, they are buried in dry quartz sand for vibration modeling, and poured under negative pressure to vaporize the model. , the casting method in which liquid metal occupies the position of the model, solidifies and cools to form a casting. The disappearing template can be made of STMMA material. At present, the production process of disappearing formwork generally chooses raw materials with a particle size of 0.8mm or more when selecting raw materials, resulting in the formed plate due to the large diameter of the raw material, there will be gaps inside the plate, and the plate is not tight enough; and the cycle of the existing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C44/08B29C44/34B29C44/60B22C7/02
CPCB29C44/08B29C44/3403B29C44/3426B29C44/60B22C7/023
Inventor 仲晓东
Owner WUHU GUANFENG MOLD PLASTICS CO LTD