Forming die of thermoplastic ship body

Abstract

The invention discloses a forming die of a thermoplastic ship body. The forming die is used for reducing material leakage of air vents of a die part during rotational moulding of the ship body and eliminating potential safety hazards. The forming die is characterized in that each ventilating pipe comprises an inserted section inserted into the die part and leakage-proof sections arranged outside the die part; the inserted sections communicate with the leakage-proof sections, and are perpendicular to a die rotational rolling axis; and the leakage-proof sections are parallel to the die rotational rolling axis. During die rotational rolling, the leakage-proof sections of the ventilating pipes can effectively prevent a material in the die part from leaking out, the waste is reduced, and normal ventilation of the die part can not be affected; the whole structure is very simple; and compared with the common ventilating pipe, the cost is nearly the same.

Description

technical field [0001] The invention relates to the field of ship manufacturing technology and equipment, in particular to a molding abrasive tool for thermoplastic ship hulls. Background technique [0002] Mold is an indispensable and most important device in rotomolding. Whether the mold design is reasonable or not directly determines the quality of rotomolding products. In the heating stage of the rotational molding process, the air in the mold expands, and the hot and humid air must be discharged in time to prevent air holes in the product and cracking of the mold surface under pressure; in the cooling stage, cold air needs to be quickly introduced into the product to contact Due to the negative pressure inside the product due to cold shrinkage, the buckling of the rotationally molded product can be reduced. Therefore, the design of the mold vent hole is one of the key points of the rotomolding mold design. [0003] The shape of the rotomolding hull mold is huge. In or...

AI Technical Summary

Problems solved by technology

[0003] The shape of the rotomolding hull mold is huge. In order to ensure the quality of ventilation, the diameter of the vent hole is also very large. When the mold is rotatably heated, the material will inevitably leak out of the vent hole, which not only wastes raw materials, but also leaks high temperature, melting State-of-the-art plastics can also cause injury to workers, with significant safety risks

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