Foaming mold exhaust device and foaming mold with the device

Abstract

The invention discloses a foaming mold air exhausting device and a foaming mold provided with the same. The foaming mold air exhausting device comprises a fixing plate (2), an air cylinder or an oil cylinder (3), an air exhausting needle plate (4), guide pillars (5), guide sleeves (6), two or more air exhausting needle steel sleeves (10) and air exhausting needles (7), wherein the fixing plate (2) is connected to the mold (1); a cylinder seat of the air cylinder or the oil cylinder (3) is connected with the fixing plate (2); the air exhausting needle plate (4) is connected with a piston rod of the air cylinder or the oil cylinder (3); the guide pillars (5) are connected to the mold (1); the guide sleeves (6) are connected to the air exhausting needles and slidably connected with the guide pillars (5); the two or more air exhausting needle steel sleeves (10) are inlaid in the mold; the air exhausting needles (7) are the same as the air exhausting needle steel sleeves (10) in number and pass through the air exhausting needle steel sleeves (10) respectively, and the ends of the air exhausting needles (7) can extend into an inner chamber of the foaming mold. By means of the foaming mold air exhausting device and the foaming mold provided with the same, the air exhausting working condition in the foaming process of the foaming mold can be improved, quality defects of products such as incomplete filling, hidden bubbles and blistering are eliminated, subsequent working load on flash removal, polishing and manual repairing conducted on the foaming products is reduced or eliminated, and the finished product rate of the products is raised.

Description

technical field [0001] The invention relates to the technical field of foaming molds, in particular to a foaming mold and an exhaust device for the foaming mold. Background technique [0002] The current automotive seat system foam generally uses polyurethane foaming technology. The polyurethane raw material reacts in the foaming mold maintaining a certain pressure to generate carbon dioxide gas to form foaming. The gas is discharged through the gap between numerous exhaust needles and steel sleeves. In the prior art, in the foaming process, quality defects such as product surface or internal voids usually occur due to unsmooth exhaust during the foaming process, resulting in certain product defects and scrapping, increasing the cost of the product. [0003] CN202592614 U discloses an exhaust device for an automobile seat foam mold, including a thimble, an exhaust cylinder and a cylinder, the thimble is connected in the exhaust cylinder, and the exhaust cylinder is connected...

AI Technical Summary

Problems solved by technology

The failure rate is high, the production line often needs to be stopped for maintenance, the maintenance cost remains high, and it seriously affects the efficiency of the production line

[0006] In the prior art, the exhaust structure of the foaming mold has many cylinders, and the diameter of a single cylinder is about 2-4cm. Because there are many water pipes on the back of the mold, there is often interference between two cylinders or The phenomenon that the cylinder interferes with the drain pipe and cannot be installed, resulting in some positions where the exhaust needle cannot be installed according to the process requirements, resulting in more defects such as material shortage, dark bubbles and vomiting, which reduces product quality and increases the scrap rate. Increased manual patching time

[0007] The exhaust structure of the foaming mold in the prior art cannot install more cylinders at the edge of the mold parting line due to the small space and other reasons, but can only use the method of opening air grooves on the parting surface to exhaust, resulting in the parting line and air grooves There are hard lumps on the edge of the product, which affects the comfort of the product, and therefore increases the subsequent processes of deburring and grinding

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