PHC non-equal thickness product forming method

Abstract

The invention provides a PHC non-equal-thickness product forming method which is easy to implement, does not damage a paper core structure and can ensure the product strength. A main body PHC product with the basically-uniform thickness of a PHC non-equal-thickness product is provided with a protrusion. The forming method comprises the following steps that A, a protrusion foaming blank which is subjected to pre-hot press molding to form the independent protrusion is placed into an auxiliary mold cavity, an upper mold and a lower mold are closed and subjected to hot pressing, the molds are opened, and the hot press molded protrusion single body is taken out; B, the protrusion foaming blank which is subjected to pre-hot press molding to form the independent protrusion is placed into the auxiliary mold cavity; C, a main body forming blank which is subjected to pre-hot press molding to form the main body PHC product is placed into a main mold cavity, and the protrusion single body is placed into a concave portion; D, the upper mold and the lower mold are closed and subjected to hot pressing, the PHC non-equal-thickness product fused with the protrusion single body placed into the concave portion is formed in the main mold cavity in a hot pressing mode, the protrusion single body is formed in the auxiliary mold cavity through hot pressing, the molds are opened, the PHC non-equal-thickness product and the protrusion single body are taken out, and the steps B, C and D are repeatedly executed.

Description

technical field [0001] The invention relates to a method for forming PHC non-equal thickness products. Background technique [0002] PHC is a kind of sandwich core that uses paper core as support, glass fiber mat as reinforcement material on the upper and lower sides, sprays polyurethane stock solution on the upper and lower sides of the material by PU spraying production line to form a foamed blank, and sends it into the molding mold to be formed by hot pressing and foaming. Composite materials are now commonly used as car spare tire covers, car trunk covers, shelf boards, sunroof sunshades, etc. [0003] The forming mold includes a relative upper mold and a lower mold. There is a mold cavity corresponding to the thickness of the PHC product between the upper mold and the lower mold. The mold cavity is developed according to the shape data of the product. The height of the mold cavity after the upper and lower mold cavities are closed It is the thickness of the product. T...

AI Technical Summary

Problems solved by technology

[0004] Due to the limitations of material technology and low design requirements, the general trunk cover is designed as a flat plate of equal thickness. With the rapid development of my country's economy, people's living standards are gradually improving. As the main means of transportation in the 21st century, people Its quality requirements are also changing, and it has gradually transformed from the initial means of transportation to more humanized design requirements for cars. In order to win the favor of consumers, the personalized design of car interiors is particularly important, and car trunks The personalized design usually brings non-uniform thickness design of the luggage cover. In order to realize the non-uniform luggage cover, it is usually bonded different material pads on the flat luggage cover of equal thickness, such as EVA, PP , EPP and other products to meet the design requirements of partial non-uniform thickness, but the bonding glue has problems of odor, VOC emission and weak bonding, and the post-bonded products generally cannot be completely designed according to the requirements. This sacrifices design flexibility, and such a process brings some quality hazards or design limitations

Images