EPS package foam forming technology

Abstract

The invention discloses an EPS package foam forming technology. The EPS package foam forming technology comprises the following steps of first, carrying out material selection; second, carrying out pre-foaming; third, carrying out fluidization; fourth, carrying out curing; fifth, carrying out forming; six, carrying out packaging; and seventh, obtaining a finished product. According to the EPS package foam forming technology, a mold designed according to the technology is used for mold forming work, and according to a traditional mold, because of a vapor lock, a vapor lock hole is prone to being blocked when ultrafine raw materials are in use; the smooth finish of the appearance of a product is guaranteed; during demolding work after forming is completed, air blowing and an ejector rod areused in cooperation, a water-free demolding technology without the vapor lock is adopted, at the moment of demolding, air blowing is carried out on a lower mold to enable the product to move towards an upper mold, and after the upper mold is opened to some extent, the product is sent downwards through the ejector rod of a material gun, and a blow-out valve acts at the time to blow the product outof the mold; and in this way, it can be avoided that the surface of the product is poor in flatness because of sinking after being impacted by water with a high-speed, and the process of transferringthe product to a drying room for drying is omitted.

Description

technical field [0001] The invention relates to the field of foam molding technology, in particular to a foam molding technology for EPS packaging. Background technique [0002] Now all domestic companies that use foam trays require that the foam trays for medical blood collection test tubes must have a smooth appearance, no wrinkles, no threshing, no unevenness, high strength, good toughness, no collapse of the product, and high flatness. [0003] For the above requirements, if traditional technology and molds are used, the following situations will occur: 1. Because of the traditional EPS molding mold, the mold cavity is full of steam plugs. Then the appearance of the product will also have steam plugs, and the appearance of the product will be unqualified. 2. When the traditional mold is formed, it is directly heated by steam through the steam plug to form the product. Then it will appear: when the steam pressure is high, the appearance of the product will appear wrinkle...

AI Technical Summary

Problems solved by technology

Then the appearance of the product will also have steam plugs, and the appearance of the product will be unqualified.

2. When the traditional mold is formed, it is directly heated by steam through the steam plug to form the product, so it will appear: when the steam pressure is high, the appearance of the product will appear wrinkles, and when the steam pressure is low, there will be grain drop phenomenon, which does not meet the requirements

3. Cooling and demoulding. When the traditional mold is cooled, the cooling water directly acts on the product through the steam plug, which will cause the appearance of the product to collapse due to the impact of the water speed, and the flatness is not good.

[0004] Moreover, because the heating steam and cooling water are directly applied to the product in the traditional process, it will cause ①, steam leakage during heating is very serious, and the temperature in the workplace is too high in summer, and workers cannot stand it

also waste energy

②. The demoulding process. Since the traditional mold is demolded with water, there will be splashes of water at the moment of mold opening. Workers must wear raincoats and rain boots, which is very uncomfortable for workers.

Moreover, working in such a high humidity and stuffy environment for a long time is not good for the health, so it is difficult to recruit workers

③. The production capacity is not high. After the product comes out of the molding machine, the water content is extremely high. Workers must move the product into the drying room for about 12 hours to dry before packaging it into the warehouse.

Moreover, building a drying room is a troublesome project. The temperature of the drying room must be precisely controlled. The drying temperature is generally controlled at 65±5 degrees. If the temperature is too high, the product is prone to secondary foaming, and the appearance is all small. Pimples are trash

If the temperature is too low, the product will not be dry, and the product will be prone to berries, and the product containing water will not be used by customers.

In addition, the drying room has relatively large space, consumes a lot of heating steam, consumes too much energy, and costs a lot. Therefore, it is necessary to invent a foam molding process for EPS packaging to solve the above problems.

Images