An eps heating and pressurized curing process

A process and curing technology, applied in the field of expandable polystyrene curing, can solve the problems of unfavorable production planning, prolonging the production cycle, high investment cost, etc., and achieve the effects of easy adjustment of production plan, reduction of investment cost and improvement of curing efficiency

Active Publication Date: 2018-10-09
承德鸿城节能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional curing process has the following disadvantages: 1. The curing effect is poor, and the negative pressure recovery rate in the cells is only 90%; 2. It takes a lot of time, which prolongs the production cycle and is not conducive to changes in production plans; 3. Occupies a large number of silos , a pre-blowing machine needs to be equipped with 3 silos with a volume of 15 cubic meters, and the investment cost is huge

Method used

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  • An eps heating and pressurized curing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The pre-released EPS foam particles are transported to the tank body of the pressure tank through the feeder and the delivery pipe, and the pressure is 0.4 kgf / cm2, and the temperature is 35 degrees Celsius. Hot air, keep the pressure (0.4 kgf / cm2) and temperature (35 degrees Celsius) of the hot air in the tank unchanged, store the EPS foam in the tank for 0.5 hours, and then fill it again into the tank of the pressure tank The temperature is the hot air of 35 degrees Celsius, so that the pressure in the tank is increased to 0.8 kgf / cm2, and the pressure (0.8 kgf / cm2) and temperature (35 degrees Celsius) of the hot air in the tank are maintained at this time. The foam particles are stored in the tank for 0.8 hours, after which, the hot air with a temperature of 35 degrees Celsius is filled into the tank body of the pressure tank again, so that the pressure in the tank is increased to 1.8 kgf / cm2, and the hot air in the tank is maintained at this time The pressure (1.8 k...

Embodiment 2

[0047]The pre-released EPS foam particles are transported to the tank body of the pressure tank through the feeder and the delivery pipe, and the pressure is 0.5 kgf / cm2 and the temperature is 40 degrees Celsius. Hot air, keep the pressure (0.5 kgf / cm2) and temperature (40 degrees Celsius) of the hot air in the tank unchanged, store the EPS foam in the tank for 0.8 hours, and then fill it again into the tank of the pressure tank The temperature is the hot air of 40 degrees Celsius, so that the pressure in the tank is increased to 1 kgf / cm2, and the pressure (1 kgf / cm2) and temperature (40 degrees Celsius) of the hot air in the tank are maintained at this time. Bubbles are stored in the tank for 1 hour, and then, fill the tank with hot air at a temperature of 40 degrees Celsius again to increase the pressure in the tank to 2 kgf / cm2, and maintain the hot air in the tank at this time The pressure (2 kgf / cm2) and temperature (40 degrees Celsius) remain unchanged, and the EPS foam...

Embodiment 3

[0050] The pre-released EPS foam particles are transported to the tank body of the pressure tank through the feeder and the delivery pipe, and the pressure is 0.6 kgf / cm2 and the temperature is 45 degrees Celsius. Hot air, keep the pressure (0.6 kgf / cm2) and temperature (45 degrees Celsius) of the hot air in the tank unchanged, store the EPS foam in the tank for 1 hour, and then fill it again into the tank of the pressure tank The temperature is the hot air of 45 degrees Celsius, so that the pressure in the tank is increased to 1.2 kgf / cm2, and the pressure (1.2 kgf / cm2) and temperature (45 degrees Celsius) of the hot air in the tank are maintained at this time. The foam particles are stored in the tank for 1.2 hours. After that, the hot air with a temperature of 45 degrees Celsius is filled into the pressure tank again, so that the pressure in the tank is increased to 2.2 kgf / cm2, and the hot air in the tank is maintained at this time. The pressure (2.2 kgf / cm2) and temperatu...

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Abstract

The invention discloses an EPS temperature-increasing pressurizing curing process. The EPS temperature-increasing pressurizing curing process comprises the steps that EPS particles are conveyed to a pressure-loading tank; hot air of which the pressure ranges from 0.4 kgf / cm<2> to 0.6 kgf / cm<2> and the temperature ranges from 35 DEG C to 45 DEG C is injected into the pressure-loading tank; the pressure and temperature of the hot air in a tank body remain unchanged, and the EPS particles are stored for 0.5 h to 1 h; the hot air is injected into the pressure-loading tank again, and the pressure in the tank body is increased to 0.8 kgf / cm<2> to 1.2 kgf / cm<2>; the pressure and temperature in the tank body remain unchanged, and the EPS particles are stored for 0.8 h to 1.2 h; the hot air is injected into the pressure-loading tank again, and the pressure in the tank body is increased to 1.8 kgf / cm<2> to 2.2 kgf / cm<2>; the pressure and temperature in the tank body remain unchanged, the EPS particles are stored for 0.8 h to 1.2 h, and curing of the EPS particles is completed. Curing treatment is conducted on EPS in a temperature-increasing pressurizing mode, the curing effect is good, and the negative pressure recovery rate in cell reaches 99%.

Description

technical field [0001] The invention relates to the field of curing of expandable polystyrene, in particular to an EPS heating and pressurizing curing process. Background technique [0002] At present, there is a certain amount of foaming agent and water vapor in the pre-released EPS (Expandable Polystyrene) particles at home and abroad. After the EPS foam leaves the reactor, it condenses into a liquid, and the liquid foams. When the agent dissolves into the EPS again, the pressure in the air bubbles drops rapidly, negative pressure (vacuum state) appears in the cells in the EPS cells, the cells of the cells collapse and are prone to deformation. In order to make there is no negative pressure in the cells, the EPS cells are usually stored in the silo for at least 12 hours to stabilize the cell pressure. This process of cell pressure stabilization is called aging. The traditional curing process has the following disadvantages: 1. The curing effect is poor, and the negative p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C35/04C08L25/06B29K25/00
CPCB29C35/049B29K2025/06C08L25/06
Inventor 周振兴杨世东彭小敏
Owner 承德鸿城节能科技有限公司
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