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CN-121973420-A - Multilayer co-extrusion distributor

CN121973420ACN 121973420 ACN121973420 ACN 121973420ACN-121973420-A

Abstract

The application relates to the technical field of dispensers, in particular to a multilayer co-extrusion dispenser, which comprises a top injection module, a middle composite module and a bottom discharge module, wherein the middle composite module is provided with a middle runner, the top injection module is provided with a first injection runner, the bottom discharge module is provided with a discharge hole, the first injection runner, the middle runner and the discharge hole are sequentially communicated, two extrusion cavities are further arranged in the middle composite module, the middle runner is positioned between the two extrusion cavities, two runner regulators are movably arranged on the middle composite module and are arranged at intervals on the inner side walls of the corresponding extrusion cavities to form outer runners, the runner regulators are provided with a fine adjustment driving mechanism, the top injection module is also provided with a plurality of second injection runners, the second injection runners are arranged in one-to-one correspondence with the outer runners, and the second injection runners, the corresponding outer runners and the middle runner are sequentially communicated. The application can improve the production efficiency and the product quality and reduce the production cost.

Inventors

  • WANG JUN
  • ZHOU SHAODONG
  • Zu Shaoke

Assignees

  • 湖北现代精工智能装备有限公司

Dates

Publication Date
20260505
Application Date
20260306

Claims (10)

  1. 1. The multilayer coextrusion distributor is characterized by comprising a top injection module (1), a middle composite module (2) and a bottom discharge module (3) which are sequentially arranged, wherein a middle runner (21) is arranged on the middle composite module (2), a first injection runner (12) is arranged on the top injection module (1), a discharge hole (31) is arranged on the bottom discharge module (3), and the first injection runner (12), the middle runner (21) and the discharge hole (31) are sequentially communicated; Two extrusion cavities (25) are further formed in the middle composite module (2), the middle runner (21) is located between the two extrusion cavities (25), two runner regulators (4) are movably arranged on the middle composite module (2), the runner regulators (4) are arranged in one-to-one correspondence with the extrusion cavities (25), the runner regulators (4) are located in the extrusion cavities (25) correspondingly, and the runner regulators (4) are arranged at intervals corresponding to the inner side walls of the extrusion cavities (25) to form outer runners (22); the flow channel regulator (4) is provided with a fine adjustment driving mechanism (5), and the fine adjustment driving mechanism (5) is used for driving the flow channel regulator (4) to adjust the width of the outer flow channel (22); A plurality of second injection flow passages (14) are further formed in the top injection module (1), the second injection flow passages (14) are arranged in one-to-one correspondence with the outer flow passages (22), and the second injection flow passages (14), the corresponding outer flow passages (22) and the middle flow passages (21) are sequentially communicated.
  2. 2. A multilayer co-extrusion distributor according to claim 1, wherein the flow channel regulator (4) comprises a wedge plate (41), one end of the wedge plate (41) is rotationally connected with the middle composite module (2) along the width direction of the wedge plate (41), the other end of the wedge plate extends obliquely towards the direction of the middle flow channel (21), one side of the wedge plate (41) along the thickness direction of the wedge plate is parallel to the corresponding inner side wall of the extrusion cavity (25) at intervals to form the corresponding outer flow channel (22), and the fine adjustment driving mechanism (5) is in transmission connection with the wedge plate (41) for driving the wedge plate (41) to rotate.
  3. 3. A multilayer co-extruded dispenser according to claim 2, wherein the side of the wedge plate (41) facing away from the respective outer runner (22) is flush with the respective inner side wall of the intermediate runner (21).
  4. 4. The multilayer coextrusion distributor according to claim 2, characterized in that the length direction of the wedge-shaped plate (41) is along the depth direction of the extrusion cavity (25), the wedge-shaped plate (41) comprises a plurality of wedge-shaped plates (441) which are sequentially arranged along the length direction of the wedge-shaped plate (41), one end of the wedge-shaped plate (441) is rotationally connected with the middle composite module (2), the other end of the wedge-shaped plate (441) extends obliquely towards the direction of the middle runner (21), and the outer runner (22) is positioned between the wedge-shaped plate (441) and the corresponding inner side wall of the extrusion cavity (25); The fine adjustment driving mechanism (5) comprises a plurality of independent drivers (54), wherein the independent drivers (54) are arranged on the middle composite module (2), the independent drivers (54) are arranged in one-to-one correspondence with the wedge-shaped thin plates (441), the independent drivers (54) are in transmission connection with the corresponding wedge-shaped thin plates (441), and the independent drivers (54) are used for driving the corresponding wedge-shaped thin plates (441) to rotate so as to adjust the distance between the wedge-shaped thin plates (441) and the corresponding inner side walls of the extrusion cavity (25).
  5. 5. The multilayer coextrusion distributor according to claim 4, wherein the fine tuning drive mechanism (5) further comprises a synchronous drive (53), the synchronous drive (53) is arranged outside the middle composite module (2), one end of the independent drive (54) is connected with the synchronous drive (53), the other end of the independent drive (54) extends into the middle composite module (2) to be in transmission connection with the corresponding wedge-shaped thin plate (441), the independent drive (54) is in movable fit with the middle composite module (2), and the synchronous drive (53) is used for driving a plurality of independent drives (54) to synchronously move so as to drive a plurality of corresponding wedge-shaped thin plates (441) to synchronously rotate.
  6. 6. The multilayer co-extrusion dispenser of claim 5, wherein the fine tuning drive mechanism (5) further comprises a power sheet (512), the wedge sheet (441) is located within the central composite module (2), and the power sheet (512) is slidingly engaged with the central composite module (2) along its length, the wedge sheet (441) being in driving connection with the power sheet (512); the independent driver (54) comprises an adjusting column (541), the length direction of the adjusting column (541) is arranged along the length direction corresponding to the power thin plate (512), one end of the adjusting column (541) is connected with the synchronous driver (53), the other end of the adjusting column extends into the middle composite module (2) and is in threaded connection with the power thin plate (512), and the adjusting column (541) is in sliding fit with the middle composite module (2) along the axial direction of the adjusting column.
  7. 7. The multilayer co-extrusion dispenser according to claim 5, wherein the fine tuning drive mechanism (5) further comprises a mounting substrate (52), the mounting substrate (52) being arranged outside the central composite module (2); The synchronous driver (53) comprises an adjusting substrate (531), the adjusting substrate (531) is located on one side, deviating from the middle composite module (2), of the mounting substrate (52), the adjusting substrate (531) is arranged at intervals parallel to the mounting substrate (52), the independent driver (54) is connected with the adjusting substrate (531), a linear driving piece (532) is arranged between the adjusting substrate (531) and the mounting substrate (52), and the linear driving piece (532) is used for driving the adjusting substrate (531) to move towards or away from the mounting substrate (52).
  8. 8. The multilayer co-extrusion dispenser of claim 7, wherein the adjustment base plate (531) is in sliding engagement with the mounting base plate (52) and the sliding direction is arranged along the direction of spacing of the adjustment base plate (531) and the mounting base plate (52); the linear driving piece (532) comprises a driving bolt (5323), the driving bolt (5323) is axially arranged along the interval direction of the adjusting substrate (531) and the mounting substrate (52), the driving bolt (5323) is rotationally connected with the adjusting substrate (531), and the driving bolt (5323) is in threaded connection with the mounting substrate (52).
  9. 9. A multilayer co-extrusion dispenser according to claim 1, characterized in that the middle composite module (2) comprises a middle plate (23), the middle plate (23) is provided with fixing plates (24) on both sides in the thickness direction of the middle plate (23), the fixing plates (24) are detachably connected with the middle plate (23), and the middle plate (23) and the fixing plates (24) are detachably connected with the top injection module (1) and the bottom discharge module (3); The middle runner (21) is penetratingly arranged on the middle plate (23), and the middle runner (21) penetrates through the middle plate (23) along the thickness direction of the middle plate (23).
  10. 10. The multilayer co-extrusion distributor according to claim 1, wherein the middle composite modules (2) are provided with a plurality of middle composite modules (2) which are sequentially connected and positioned between the top injection module (1) and the bottom discharge module (3), the top injection module (1) and the bottom discharge module (3) are respectively connected with the corresponding adjacent middle composite modules (2), and the first injection runner (12), the plurality of middle runners (21) and the corresponding discharge ports (31) are sequentially communicated.

Description

Multilayer co-extrusion distributor Technical Field The application relates to the technical field of dispensers, in particular to a multilayer co-extrusion dispenser. Background Multilayer coextrusion is an important means of producing composite films, sheets in the field of plastics processing by joining multiple melts from different extruders in a predetermined hierarchical structure through a coextrusion distributor and subsequently entering a die for shaping. In the multi-layer compounding process, the geometric dimensions of the flow channels through which the melt of each layer flows in the distributor directly determine the thickness proportion and the distribution uniformity of each layer in the finally produced composite film. Currently, the ratio of the melt to the melt in each layer of the existing distributor is usually fixed after the runner structure is set. When the thickness ratio of each layer is required to be adjusted due to the change of the product specification, the dispenser is usually required to be stopped, the dispenser is disassembled, and the flow passage insert or the flow guide block with the flow dividing function in the dispenser is replaced so as to change the flow cross section area of the corresponding flow passage in the dispenser. In the related art, when the corresponding specification of the product is changed, the shutdown is required to disassemble and replace the parts, which leads to interruption of production operation and influences the production efficiency. Moreover, the use of the dispenser also requires a re-heat start and re-commissioning after replacement of the parts, which not only wastes time, but also creates a lot of transitions and waste products, resulting in unnecessary wastage of raw materials. Thus, in such a case, the use of the existing dispenser may result in an increase in production costs of the product. Disclosure of Invention The application provides a multilayer co-extrusion distributor, which aims to adjust the width of a flow passage under the state of no shutdown by the structural design of the distributor, so as to change the layer thickness proportion of each layer in a produced composite membrane material, further improve the production efficiency and the product quality and reduce the production cost. The application provides a multilayer coextrusion distributor, which adopts the following technical scheme: A multilayer coextrusion distributor comprises a top injection module, a middle composite module and a bottom discharge module which are sequentially arranged, wherein a middle runner is arranged on the middle composite module, a first injection runner is arranged on the top injection module, a discharge hole is arranged on the bottom discharge module, the first injection runner, the middle runner and the discharge hole are sequentially communicated, two extrusion cavities are further arranged in the middle composite module, the middle runner is arranged between the two extrusion cavities, two runner regulators are movably arranged on the middle composite module and are in one-to-one correspondence with the extrusion cavities, the runner regulators are arranged in the extrusion cavities and are in interval arrangement with the inner side walls of the extrusion cavities to form outer runners, a fine adjustment driving mechanism is arranged on the runner regulators and is used for driving the runner regulators corresponding to the outer runners so as to adjust the width of the outer runners, a plurality of second injection runners are also arranged on the top injection module, and the second injection runners are in one-to-one correspondence with the outer runners and are sequentially communicated with the outer runners. Through adopting above-mentioned technical scheme, under the structural design of distributor, when carrying out the production of composite film material, the intermediate level material gets into in the middle runner through first injection runner, and the outer material then gets into in the middle runner through second injection runner and corresponding outer runner in proper order. In the middle runner, the middle layer material and the outer layer materials on two sides are overlapped and combined to form a three-layer composite membrane material, and the three-layer composite membrane material is stably extruded from a discharge hole under the action of pressure. This enables the basic functions of the dispenser to be implemented. On the basis, based on the structural design of the fine-tuning driving mechanism and the runner regulator, the fine-tuning driving mechanism can drive the runner regulator to move in the corresponding extrusion cavity, so that the gap between the runner regulator and the side wall of the corresponding extrusion cavity is changed, namely the width of the corresponding outer runner is changed, the thickness proportion of the outer material in the produced composite film can be adju