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Double-layer all-plastic ship rotational molding manufacturing method

A manufacturing method and ship technology, applied in the coating and other directions, can solve the problems of inaccessibility and waste of materials, and achieve the effect of overcoming labor-intensive, strong hull and not easy to deform.

Inactive Publication Date: 2018-03-20
王海平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this move not only wastes materials, but also fails to achieve the desired goal.

Method used

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  • Double-layer all-plastic ship rotational molding manufacturing method
  • Double-layer all-plastic ship rotational molding manufacturing method

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Embodiment Construction

[0016] 1. A method for manufacturing double-layer all-plastic ship rotational molding, the process is:

[0017] 1) Fix the supporting frame inside the inner mold body with the supporting frame fixing device, the supporting frame has upper and lower parallel surfaces, and its upper surface is attached to the inner wall of the inner mold;

[0018] 2) The inner and outer mold bodies are combined, and the lower surface of the supporting frame is attached to the inner wall of the outer mold;

[0019] 3) Add plastic and other raw materials to each cavity area between the inner and outer mold bodies through the feeding port, and the cavity area is divided by the supporting frame;

[0020] 4) Heating and rolling the mold to melt and mix the plastic and other raw materials on the inner wall of the mold;

[0021] 5) Cooling and demoulding.

[0022] The supporting frame used is molded from the same material as the hull shell. The supporting frame is divided into keels, ribs and reinfor...

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Abstract

The invention provides a rotational molding manufacturing method for a double-layer all-plastic ship. The method includes the process that after an inner mold body and an outer mold body are combined, plastic and other raw materials are added through a feed port, the mold bodies are heated and rolled, the plastic and other raw materials are melted, mixed and arranged on the inner walls of the mold bodies in a coating mode, and finally cooling and demolding are conducted; before the inner mold body and the outer mold body are combined, a supporting frame is fixed between the inner mold body and the outer mold body through a supporting frame fixing device, and the distance between the surface of the supporting frame and the inner walls of the inner mold body and the outer mold body is within the design thickness of a hull shell. Compared with the prior art, the supporting frame is arranged between the inner layer and the outer layer of the hull shell, the defects that no keel is arranged, and a rib hull is insufficient in strength are overcome, the hull is firm and stable and is not prone to deformation, re-modification worries are avoided, and the defects that labor and materials are wasted due to the fact that reinforcing ribs are additionally welded or a hollow interlayer is filled with foam materials are overcome.

Description

technical field [0001] The invention relates to a method for manufacturing a double-layer all-plastic ship by rotational molding. Background technique [0002] A double-layer all-plastic ship refers to a ship with a hollow sandwich hull composed of two layers of plastic. There are two manufacturing methods for this kind of hull with a hollow interlayer composed of two layers of plastics. One is to mold the inner and outer hulls and then weld them together, and the other is to directly make them by rotational molding. . Wherein the mold used in the rotomolding process has an inner and outer mold body with a feeding port, and the inner and outer mold bodies form a cavity in the shape of a hull after mold closing. When processing the hull, the mold with plastic and other raw materials inside is placed on the rolling device, and the mold is heated while rolling, so that the plastic and other raw materials are melted and mixed, and then coated on the inner wall of the mold, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C41/08B29C41/38
CPCB29C41/085B29C41/38
Inventor 王祥富
Owner 王海平
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