Processing method of flexible foamed polyurethane automobile seat
A technology for polyurethane soft foam and car seats, which is applied in the processing field of car seats and can solve problems such as inability to meet comfort requirements and the like
Inactive Publication Date: 2012-11-07
TIANJIN BOXIN AUTOMOBILE PARTS
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Problems solved by technology
The existing technology is to inject different proportions of raw materials into different areas of the mold, which is equivalent to forming multiple different sub-mold cavities. The production equipment is equipped with multiple storage barrels, so that the parts of the produced seats have different densities. and hardness, can not meet the comfort requirements
Method used
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Embodiment Construction
[0021] This embodiment relates to a method for processing a soft polyurethane foam car seat. It uses a mold consisting of an upper mold 1 and a lower mold 2 with a lower mold cavity. The outer area 5 on both sides of the middle area 3, the middle area 3 and the outer area 5 are spaced from each other by a spacer 6, the spacer 6 has a height of about 15-20mm higher than the middle area 3, and the upper mold 1 and the lower mold 2 Both are equipped with heat-insulating water pipes 4 connected to the mold temperature controller, and the distribution density of the heat-insulating water pipes of the lower mold 2 is higher than that of the upper mold 1. After using the above-mentioned molds, the processing method includes the following steps:
[0022] Step 1: Store the white material and black material in the storage tank separately, and set the temperature of the storage tank to 20°C-26°C;
[0023] Step 2: Adjust the temperature of the upper mold to 41°C-45°C, and the temperature ...
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The invention relates to a processing method of a flexible foamed polyurethane automobile seat, which adopts a mold provided with an upper mold and a lower mold, wherein a middle region and outer regions on two sides of the middle region are formed in a cavity of the lower mold. The processing method comprises the following steps: respectively storing a white material and a black material in a storage tank for further use; adjusting temperature of the upper mold to 41-45 DEG C and adjusting the temperature of the lower mold to 61-65 DEG C; mixing the black material with the white material by a mixing head and then spraying into the middle region and the outer regions of the cavity of the lower mold, wherein the ratio of the white material to the black material sprayed into the middle region is 100:38-40, and the ratio of the white material to the black material sprayed into the outer regions in a mixed manner is 100:50-55; assembling the mold and reacting, then curing and shaping; and opening the mold to take out the product. The foamed polyurethane seat with different hardness at the same position is manufactured by adopting the technical scheme, the ratio of indentation hardness is high, and the comfortableness is good.
Description
technical field [0001] The invention relates to a processing method of a car seat, in particular to a processing method of a soft polyurethane foam car seat. Background technique [0002] Polyurethane soft foam is used in car seat technology. It was introduced into my country in the late 1980s. After a series of improvements such as heat-cured foam and adding physical foaming agent to foam, it is now relatively mature and widely used. Polyether type cold curing high resilience polyurethane soft foam. With the continuous improvement of people's requirements for the quality of automobiles, the requirements for various performances of automobile seats, especially for comfort, safety and environmental protection, are also continuously increasing. Polyurethane soft foam is made by mixing black material (isocyanate) and white material (combined polyether) in a certain proportion. In order to ensure the comfort of passengers, the same part of the foam needs to have a higher dent ha...
Claims
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IPC IPC(8): B29C44/04B29C44/60B29K75/00
Inventor 张正旭刘建磊
Owner TIANJIN BOXIN AUTOMOBILE PARTS