Tapered corrugated extrusion die

A corrugated extrusion port technology, applied in the field of gradual corrugated extrusion dies, can solve the problem that the extrusion size of polymer materials is not easy to control, and achieve the effect of small internal stress, better mechanical properties and better mechanical properties

Active Publication Date: 2017-06-13
CHANGZHOU UNIV
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: in order to solve the technical problem that the extruded size of the polymer material is not easy to control in the prior art, the present invention provides a gradual corrugated extrusion die

Method used

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  • Tapered corrugated extrusion die

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Embodiment Construction

[0019] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0020] Such as figure 1 As shown, it is the best embodiment of the present invention, a gradual corrugated extrusion die, the die can be connected with the extruder, and can extrude rods, pipes, etc., and the inner wall of the die is basically in the shape of a similar bellows. The shape of the die is cylindrical, and there is a corrugated through hole on the central axis of the die. The corrugated through hole is the entrance area 1, the die area 2 and the exit area 3 from the entrance to the exit.

[0021] The entrance area 1 is cylindrical with a diameter of d0; the entrance area 1 is made into a cylinder to ensure the strength and rigidity of the die. If t...

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Abstract

The invention relates to the technical field of polymer materials formation processing, in particular to a tapered corrugated extrusion die. The die is cylindrical; a corrugated through hole is formed in the central axis of the die; an inlet area, a die area and an outlet area are sequentially arranged in the direction from an inlet to an outlet in the corrugated through hole, wherein the inlet area is cylindrical, the die area is of a multi-segment continuous corrugated expansion form from the inlet area to the outlet area\, and the outlet area is of a conical outward expansion form; and a diameter is increased from inside to outside. According to the tapered corrugated extrusion die, the inner wall of the die is shaped like a corrugated pipe; along with the increment of the size of each segment, the polymer material has a space for molecular chain relaxation; the molecular chain gradually relaxes and then extruded segment by segment, and molecular chain relaxation is substantially balanced when the molecular chain reaches the outlet area; and the size of the extruded product is substantially consistent with the size of the outlet, and the internal stress of products (such as bars, pipes, etc.) is small and have better mechanical properties.

Description

technical field [0001] The invention relates to the technical field of polymer material molding and processing, in particular to a gradual corrugated extrusion die. Background technique [0002] Generally, when extruding a polymer material through a traditional die, due to the viscoelasticity of the polymer material itself, there will be extrusion swelling, also known as die swell, that is, the size of the extruded polymer part is larger than that of the die. The size is large. This makes the extruded material size not easy to control. It is expected that the size of the extruded polymer material is consistent with the size of the die. Contents of the invention [0003] The technical problem to be solved by the present invention is: in order to solve the technical problem that the extruded size of the polymer material is not easy to control in the prior art, the present invention provides a gradual corrugated extrusion die. [0004] The technical solution adopted by the...

Claims

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Application Information

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IPC IPC(8): B29C47/12B29C48/30
CPCB29C48/30
Inventor 廖华勇陶国良刘春林
Owner CHANGZHOU UNIV
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