US 11,806,908 B2Granted

Extruding system and method of extruding

AssigneeOtrajet Inc.

InventorsFa-Shen Chen, Liang-Hui Yeh

Life of this patent

Estimating the term…

Loading patent…

Abstract

An extruding system includes a melting unit configured to convey a polymeric material, a mixing unit configured to mix the polymeric material with a blowing agent to form a mixture, an injection unit configured to inject the mixture, a first flow control element disposed between the melting unit and the mixing unit, and a second flow control element disposed between the mixing unit and the injection unit. A method of extruding includes conveying a polymeric material from a melting unit to a mixing unit, conveying a blowing agent into the mixing unit, mixing the polymeric material with the blowing agent to form a mixture, conveying the mixture from the mixing unit to an injection unit, and discharging the mixture from the injection unit, wherein flow of the polymeric material is controlled by a first flow control element, and flow of the mixture is controlled by a second flow control element.

Claims20

Dependent claims

A method of extruding a mixture of a polymeric material and a blowing agent, comprising:

conveying the polymeric material from a melting unit to a mixing unit by rotating a pushing member in a hollow pressing cartridge of the melting unit, wherein the pushing member is immovable in a direction parallel to a longitudinal axis of the hollow pressing cartridge, and has a first groove annularly arranged over a surface of the pushing member, the first groove is in a first depth;
conveying the blowing agent into the mixing unit;
mixing the polymeric material with the blowing agent in the mixing unit to form the mixture by axially rotating a mixing rotor in a hollow mixing cartridge of the mixing unit, wherein the mixing rotor is immovable in a direction parallel to a longitudinal axis of the hollow mixing cartridge, the mixing rotor includes a first groove portion having a second groove and a second groove portion having a third groove, the first groove portion is arranged at one end adjacent to the melting unit, the second groove portion is annularly arranged at the other end adjacent to the injection unit, and a groove depth of the second groove and a groove depth the third groove are different from the first depth;
conveying the mixture from the mixing unit to an injection unit, wherein the injection unit connects to the mixing unit, the injection unit includes a hollow metering cartridge configured to accommodate the mixture and a discharging member slidably disposed in the hollow metering cartridge, the discharging member is movable in a direction parallel to a longitudinal axis of the hollow metering cartridge and is not axially rotatable relative to the hollow metering cartridge;
and
moving the discharging member in a direction parallel to a longitudinal axis of the hollow metering cartridge to discharge a first amount of the mixture from the injection unit,
wherein the conveying of the polymeric material from the melting unit to the mixing unit includes controlling flow of the polymeric material from the melting unit to the mixing unit by a first flow control element disposed between the melting unit and the mixing unit, and the conveying of the mixture from the mixing unit to the injection unit includes controlling flow of the mixture from the mixing unit to the injection unit by a second flow control element disposed between the mixing unit and the injection unit.

4 more elements

An extruding system, comprising:

a melting unit configured to convey a polymeric material, wherein the melting unit includes a hollow pressing cartridge configured to accommodate the polymeric material and a pushing member rotatable within the hollow pressing cartridge;
a mixing unit configured to receive the polymeric material from the melting unit and configured to mix the polymeric material with a blowing agent and to form a mixture of the polymeric material and the blowing agent, wherein the mixing unit includes a hollow mixing cartridge and a mixing rotor rotatably disposed in the hollow mixing cartridge, the mixing rotor is immovable in a direction parallel to a longitudinal axis of the hollow mixing cartridge, is axially rotatable relative to the hollow mixing cartridge;
a blowing agent supply unit connected to the mixing unit and configured to convey the blowing agent into the mixing unit;
an injection unit configured to inject the mixture, wherein the injection unit includes a hollow metering cartridge configured to accommodate the mixture and a discharging member slidably disposed in the hollow metering cartridge, the discharging member is movable in a direction parallel to a longitudinal axis of the hollow metering cartridge and is not axially rotatable relative to the hollow metering cartridge;
a first flow control element disposed between the melting unit and the mixing unit and configured to control flow of the polymeric material from the melting unit to the mixing unit;
and
a second flow control element disposed between the mixing unit and the injection unit and configured to control flow of the mixture from the mixing unit to the injection unit,
wherein the pushing member has a first groove annularly arranged over a surface of the pushing member, the first groove is in a first depth, the mixing rotor includes a first groove portion having a second groove and a second groove portion having a third groove, the first groove portion is arranged at one end adjacent to the melting unit, the second groove portion is annularly arranged at the other end adjacent to the injection unit, and a groove depth of the second groove and a groove depth of the third groove are different from the first depth.

5 more elements

An extruding system, comprising:

a melting unit configured to convey a polymeric material, wherein the melting unit includes a hollow pressing cartridge and a pushing member rotatable within the hollow pressing cartridge;
a mixing unit configured to receive the polymeric material from the melting unit and configured to mix the polymeric material with a blowing agent to form a mixture of the polymeric material and the blowing agent, wherein the mixing unit includes a hollow mixing cartridge and a mixing rotor rotatably disposed in the hollow mixing cartridge, the mixing rotor is immovable in a direction parallel to a longitudinal axis of the mixing cartridge, is axially rotatable relative to the hollow mixing cartridge;
a blowing agent supply unit connected to the mixing unit and configured to convey the blowing agent into the mixing unit;
an injection unit configured to inject the mixture, wherein the injection unit includes a hollow metering cartridge configured to accommodate the mixture and a discharging member slidably disposed in the hollow metering cartridge, the discharging member is movable in a direction parallel to a longitudinal axis of the hollow metering cartridge and is not axially rotatable relative to the hollow metering cartridge;
and
a monitoring module configured to monitor the extruding system in real time, wherein the monitoring module includes a sensor disposed in the extruding system,
wherein the pushing member has a first groove annularly arranged over a surface of the pushing member, the first groove is in a first depth, the mixing rotor includes a first groove portion having a second groove and a second groove portion having a third groove, the first groove portion is arranged at one end adjacent to the melting unit, the second groove portion is annularly arranged at the other end adjacent to the injection unit, and a groove depth of the second groove and a groove depth of the third groove are different from the first depth.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/831,386Filed 26 Mar 2020 · continuation in part
Priority: TW 1061185785 Jun 2017
Published: US 2020/0223118 A116 Jul 2020
Granted: 7 Nov 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

B29C 48/0012
Combinations of extrusion moulding with other shaping operations: combined with shaping by internal pressure generated in the material, e.g. foaming
B29C 44/3446
Mixing, kneading or conveying the foamable material: feeding the blowing agent
B29C 48/2552
Flow control means, e.g. valves: provided in the feeding, melting, plasticising or pumping zone, e.g. screw, barrel, gear-pump or ram
B29C 48/285
Component parts, details or accessories; Auxiliary operations: feeding the extrusion material to the extruder

Family

Application15/647,087Parent of this continuation-in-part · filed 11 Jul 2017
Application62/915,287Us provisional application · filed 15 Oct 2019
US 2020/0223118 A1Pre-grant publication · published 16 Jul 2020
US 10,913,189 B2Parent of this continuation-in-part
US 2018/0345546 A1Published application
US 11,806,908 B2This patent

From the US filing history. Foreign family members aren’t listed.