EPS foam packing box production process

A production process and packaging box technology, applied in the field of expandable polystyrene curing, can solve the problems of prolonging the production cycle, unfavorable production plan, and poor curing effect, so as to reduce investment costs, facilitate adjustment of production plan, and save production cycle Effect

Active Publication Date: 2016-11-09
福建南安艺洋泡沫制品有限公司
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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 c

Method used

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  • EPS foam packing box production process
  • EPS foam packing box production process
  • EPS foam packing box production process

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0050] Example 1:

[0051] This embodiment is related to the design of a production process for EPS foam packaging boxes. Compressed hot air is injected in each stage, and after each stage of injection of compressed air, the pressure and temperature in the pressure-carrying tank gradually increase, so that the negative pressure in the cells in the EPS cells can be quickly restored to the atmospheric pressure. In the production process of EPS foam packaging boxes, the specific process of the curing process is as follows.

[0052] Please refer to figure 1 , is a schematic flowchart of the curing process in the embodiment of the present invention. As shown in the figure, the curing process includes:

[0053] In step S1, the pre-released EPS foam particles are transported to the pressure-carrying tank through a feeder, wherein the pressure-carrying tank is in a state of normal temperature and pressure at this time, and the EPS foam particles are transported to the pressure-carr...

Example Embodiment

[0063] Embodiment 1:

[0064] The pre-released EPS foam particles are transported to the tank of the pressure-carrying tank through the feeder and the conveying pipe, and the closed tank of the pressure-carrying tank is filled with a pressure of 0.4 kgf / square centimeter and a temperature of 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 refill the tank in the pressure-carrying tank The hot air with a temperature of 35 degrees Celsius increases the pressure in the tank to 0.8 kgf / cm2, and maintains the pressure (0.8 kgf / cm2) and temperature (35 degrees Celsius) of the hot air in the tank at this time. The foam is stored in the tank for 0.8 hours, after which, the tank of the pressure-carrying tank is filled with hot air with a temperature of 35 degrees Celsius again, so that the pressure in the tank is increased to 1.8 kgf / cm2, and the...

Example Embodiment

[0066] Embodiment 2:

[0067] The pre-released EPS foam is transported to the tank of the pressure-carrying tank through the feeder and the conveying pipe, and the closed tank of the pressure-carrying tank is filled with a pressure of 0.5 kgf / cm 2 and a temperature of 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 refill the tank in the pressure-carrying tank The hot air with a temperature of 40 degrees Celsius increases the pressure in the tank to 1 kgf / cm2, and maintains the pressure (1 kgf / cm2) and temperature (40 degrees Celsius) of the hot air in the tank at this time. The foam is stored in the tank for 1 hour. After that, the tank of the pressure-carrying tank is filled with hot air with a temperature of 40 degrees Celsius again, so that the pressure in the tank is increased to 2 kgf / cm2, and the hot air in the tank is maintained...

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Abstract

The invention discloses an EPS foam packing box production process. The EPS foam packing box production process comprises pre-foaming, curing and forming procedures, wherein in the curing procedure, EPS foam particles are conveyed to a pressure-loading tank; hot air of which the pressure is 0.4-0.6 kilogram force per square centimeter and the temperature is 35-45 DEG C is injected into the tank body of the pressure-loading tank; the pressure and the temperature of hot air in the tank body are kept unchanged, and the EPS foam particles are stored for 0.5-1 hour; hot air is injected into the tank body again, thereby increasing the internal pressure of tank body to 0.8-1.2 kilogram force per square centimeter; the internal pressure and temperature of the tank body are kept unchanged, and the EPS foam particles are stored for 0.8-1.2 hours; hot air is injected into the tank body for the third time, thereby increasing the internal pressure of tank body to 1.8-2.2 kilogram force per square centimeter; and the internal pressure and temperature of the tank body are kept unchanged, the EPS foam particles are stored for 0.8-1.2 hours, and then the curing treatment is completed. According to the EPS foam packing box production process, a pressurizing and warming mode is adopted for the curing treatment, the curing effect is good, and the cell internal negative pressure recovery rate reaches 99%.

Description

technical field [0001] The invention relates to the field of curing of expandable polystyrene, in particular to a production process of EPS foam packaging boxes. Background technique [0002] In the production process of EPS foam packaging boxes, at present, there is a certain amount of foaming agent and water vapor in the pre-released EPS (Expandable Polystyrene) foam particles at home and abroad. , condenses into a liquid, and the liquid foaming agent dissolves into the EPS cells, the pressure in the 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...

Claims

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Application Information

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IPC IPC(8): B29C44/34B29C44/02B29C44/44
CPCB29C44/02B29C44/3403B29C44/3426B29C44/445
Inventor 周振兴杨世东彭小敏
Owner 福建南安艺洋泡沫制品有限公司
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