Continuous melting dipping machine head and method for forming long fiber reinforced thermoplastic resin

Abstract

The invention discloses a continuous melting dipping machine head and a method for forming a long fiber reinforced thermoplastic resin. According to the melting dipping machine head, a melt distributing flow channel and a dipping flow channel are arranged in the machine head; each material outlet of the melt distributing flow channel is connected with the dipping flow channel through a discharging roller; an inlet channel and an outlet channel are arranged at two ends of the dipping flow channel; at least one group of tension rollers are arranged between the inlet channel and the discharging roller; and at least one group of the tension rollers are arranged between the outlet channel and the discharging roller. The method comprises the following steps of: feeding continuous long fiber bundles into the dipping flow channel through the inlet channel, and drawing out of the continuous long fiber bundles from the outlet channel after the continuous long fiber bundles penetrate through the discharging roller, in a process, thermoplastic melt penetrates through a discharging roller permeating glass fiber through the melt distributing flow channel and is fed into the dipping flow channel; and further dipping the continuous long fiber bundles. According to the melting dipping machine head provided by the invention, the melt distributing flow channel is arranged and is connected with the dipping flow channel through the discharging roller, thus, melt contacted with each long fiber bundle can be consistent in pressure and flow rate, and balance of a dipping effect of each continuous long fiber can be ensured.

Description

technical field [0001] The invention relates to the technical field of thermoplastic resin molding, in particular to a melting impregnation head and method for continuous long fiber reinforced thermoplastic resin molding. Background technique [0002] At present, there are many kinds of equipment for thermoplastic resin molding, but in the melt impregnation equipment for continuous long fiber reinforced thermoplastic resin, the continuous long fiber bundles often cannot obtain uniform melt impregnation effect due to the unreasonable structure of the machine head. , thereby affecting product quality. [0003] The patent application with the publication number JP2002307432A discloses a long fiber infiltration device, which is designed with a resin injection port on the lower side of the fiber bundle pulling direction, and each independent resin injection port is closely attached to the corresponding fiber bundle , the resin penetrates the glass fiber from bottom to top; the m...

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Problems solved by technology

However, experiments have proved that when the equipment is used for simultaneous impregnation of multiple continuous fibers, it is difficult to ensure the uniformity of impregnation of each fiber

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