Rotational molding forming device

Abstract

The invention discloses a rotational molding forming device applying constant-temperature jet-propelled heating, belonging to the technical field of rotational molding. The rotational molding forming device is used for manufacturing large and medium plastic products with complicated shapes by using a rotational molding technology. The rotational molding forming device mainly comprises an air heating system, a forming die, a gas recycling cover, an insulating layer, a hot air distributing pipe, a nozzle, a rotational spindle cylinder, a crank arm, a hot air inlet pipe and a hot air distributing pipe air outlet pipe. Polymers capable of being applied to rotational molding forming can be processed into plastic products by using the device. According to the invention, the deficiency in several kinds of rotational molding more widely applied to the rotational molding forming device is solved to a certain degree. The novel rotational molding forming device has the advantages of high temperature control precision, good temperature uniformity, high heat exchange efficiency and low die cost, and overcomes the defects of large energy loss, long production period, low production efficiency and the like of the rotational molding forming device.

Description

Technical field [0001] The invention relates to a rotary moulding device applying constant temperature jet heating, belonging to the technical field of rotary moulding. Background technique [0002] Rotational molding is a process for forming hollow plastic products, also known as rotational molding or rotational molding. The rotational molding process is to add plastic powder into the mold, and then heat the mold and make it continuously rotate along two mutually perpendicular axes. Under the action of gravity and heat, the resin in the mold is gradually uniformly coated and melted and adhered to the inner surface of the mold. , Forming the required shape, and then cooling to obtain the product. Compared with the extrusion, injection and blow molding processes commonly used in plastic molding, the rotational molding process has the advantages of less equipment and mold investment, suitable for the production of large and medium-sized and thin-walled plastic products, and the pr...

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Problems solved by technology

[0004] The present invention proposes a rotary molding device, which uses a constant temperature jet heating method to pre-overcome the shortcomings of several widely used rotary molding devices currently used in rotary molding equipment: direct fire heating is mainly used for In swinging rotary molding equipment, the temperature control accuracy and temperature uniformity are poor; the hot chamber air heating type is mainly used in biaxial rotary molding equipment, and there is an extra volume in the hot chamber that is not occupied by the mold, resulting in heat Loss, there will be energy loss in the outer wall of the heating chamber and during each opening and closing of the heating chamber door, and the difference in hot air flow on the surface of the mold in the hot chamber causes low heat transfer efficiency; the jacket heating type has high heating efficiency but the cost of the mold Very high, practical application is limited

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