CN110722761A - Multilayer inner chamber extrusion tooling - Google Patents

Multilayer inner chamber extrusion tooling Download PDF

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Publication number
CN110722761A
CN110722761A CN201911025564.XA CN201911025564A CN110722761A CN 110722761 A CN110722761 A CN 110722761A CN 201911025564 A CN201911025564 A CN 201911025564A CN 110722761 A CN110722761 A CN 110722761A
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CN
China
Prior art keywords
extrusion
flow channel
core
runner
outer plate
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Application number
CN201911025564.XA
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Chinese (zh)
Inventor
柯友军
张家权
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Huangshi Hongda Plastic Mould Co Ltd
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Huangshi Hongda Plastic Mould Co Ltd
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Publication date
Application filed by Huangshi Hongda Plastic Mould Co Ltd filed Critical Huangshi Hongda Plastic Mould Co Ltd
Priority to CN201911025564.XA priority Critical patent/CN110722761A/en
Publication of CN110722761A publication Critical patent/CN110722761A/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • B29C48/307—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets specially adapted for bringing together components, e.g. melts within the die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/002—Panels; Plates; Sheets

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The invention discloses a multilayer inner cavity extrusion die, which comprises: a die body, wherein one end of the die body is provided with an extrusion groove, the other end of the die body is provided with a feeding groove, one end of the extrusion groove communicated with the outer wall of the die body is an extrusion opening, one end of the feeding groove communicated with the outer wall of the die body is a feeding opening, a first outer plate runner, a second outer plate runner and a middle plate runner are arranged in the die body side by side, the glue injected from the feed inlet is divided by the first outer plate flow channel, the second outer plate flow channel and the middle plate flow channel in the multilayer inner cavity extrusion die, the glue required by the extrusion molding of the two outer side plates of the multilayer structure wallboard is supplied by the first outer plate flow channel and the second outer plate flow channel respectively, and the glue required by the extrusion molding of the middle layer of the multilayer structure wallboard is supplied by the middle plate flow channel, so that the flow channels are separately arranged and independently supplied, and the quality of the extruded wallboard is improved.

Description

Multilayer inner chamber extrusion tooling
Technical Field
The invention relates to the technical field of extrusion dies, in particular to a multilayer inner cavity extrusion die.
Background
At present, the plastic wallboard is generally processed and molded by adopting an extrusion die, when the plastic wallboard has a three-layer or more structure, the core in the die is usually set into two layers or more than two layers, for example, when the wallboard has a three-layer structure, the core is required to be set into two layers, and the plastic plate extruded between the opposite surfaces of the two layers of cores is used as the middle layer of the plastic wallboard.
The existing problems are that a flow channel between a feed inlet and an extrusion outlet of an extrusion die has a certain length, and rubber materials can be subjected to frictional resistance of the inner wall of the flow channel when moving in the flow channel, so that the difference between the flow rate of the center of the flow channel and the flow rate of the edge of the flow channel is large, and the quality difference of the rubber materials of each layer of an extruded plastic wallboard is large.
It should be noted here that the technical contents provided in this section are intended to assist those skilled in the art in understanding the present invention, and do not necessarily constitute prior art.
Disclosure of Invention
The invention aims to overcome the technical defects and provide a multi-layer inner cavity extrusion die, which solves the technical problem that the quality difference of rubber materials of each layer of an extruded plastic wallboard is large in the prior art.
In order to achieve the above technical object, a technical solution of the present invention provides a multi-layer inner cavity extrusion die, including: the mould comprises a mould body, wherein an extrusion groove is formed in one end of the mould body, a feeding groove is formed in the other end of the mould body, one end of the extrusion groove communicated with the outer wall of the mould body is an extrusion port, one end of the feeding groove communicated with the outer wall of the mould body is a feeding port, a first outer plate flow channel, a second outer plate flow channel and an intermediate plate flow channel are arranged in the mould body side by side, at least one intermediate plate flow channel is arranged, the intermediate plate flow channel is arranged between the first outer plate flow channel and the second outer plate flow channel, one end of each of the first outer plate flow channel, the second outer plate flow channel and the intermediate plate flow channel is communicated with one end of the extrusion groove far away from the extrusion port, and the other end of each of the first outer plate flow channel, the second outer plate flow channel and the intermediate plate flow channel is.
Compared with the prior art, the invention has the beneficial effects that: the glue solution injected from the feed inlet is distributed through a first outer plate flow channel, a second outer plate flow channel and an intermediate plate flow channel in the multilayer inner cavity extrusion die, glue materials required by extrusion molding of two outer side plates of the multilayer structure wallboard are supplied by the first outer plate flow channel and the second outer plate flow channel respectively, and the glue materials required by extrusion molding of the intermediate layer of the multilayer structure wallboard are supplied by the intermediate plate flow channel, the flow channels are separately arranged and independently supplied, so that the pipe diameter of the flow channel in the prior art is reduced, the flow speed at the center of the flow channel and the flow speed difference at the edge of the flow channel are reduced, and the quality of the extruded wallboard is improved.
Drawings
FIG. 1 is a schematic side view of a multi-layer internal cavity extrusion die according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of an end face structure of an extrusion port of an embodiment of a multi-layer inner cavity extrusion die provided by the invention.
FIG. 3 is a schematic diagram of a feed port end face structure of an embodiment of a multi-layer inner cavity extrusion die provided by the invention.
FIG. 4 is a schematic view showing a connection structure of the core with the first and second middle plates according to the present invention.
Fig. 5 is a partially enlarged schematic view of a portion a in fig. 4.
Fig. 6 is a schematic cross-sectional view of a wall panel extruded from a multi-layer cavity extrusion die provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 2 and fig. 3, the present embodiment provides a multi-layer inner cavity extrusion mold, including: a die body 1.
One end of the die body 1 is provided with an extrusion groove 1a, the other end of the die body 1 is provided with a feeding groove 1b, one end of the extrusion groove 1a communicated with the outer wall of the die body 1 is an extrusion opening, one end of the feeding groove 1b communicated with the outer wall of the die body 1 is a feeding opening, the die body 1 is internally provided with a first outer plate runner a1, a second outer plate runner a2 and an intermediate plate runner a3 which are arranged side by side, at least one intermediate plate runner a3 is arranged, and the middle plate flow passage a3 is disposed between the first outer plate flow passage a1 and the second outer plate flow passage a2, one end of each of the first outer plate flow passage a1, the second outer plate flow passage a2 and the middle plate flow passage a2 is communicated with one end of the extrusion groove 1a far away from the extrusion port, the other ends of the first outer plate flow passage a1, the second outer plate flow passage a2 and the middle plate flow passage a3 are communicated with one end of the feed chute 1b far away from the feed inlet.
The glue injected from the feed inlet is divided by the first outer plate flow channel a1, the second outer plate flow channel a2 and the middle plate flow channel a3, glue required by extrusion molding of two outer side plates of the multi-layer structure wallboard is supplied by the first outer plate flow channel a1 and the second outer plate flow channel a2 respectively, and glue required by extrusion molding of the middle layer 01 of the multi-layer structure wallboard is supplied by the middle plate flow channel a3, so that the flow channels are separately arranged and independently supplied, the pipe diameter of the flow channel in the prior art is reduced, the flow speed difference between the center of the flow channel and the edge of the flow channel is reduced, and the quality of the extruded wallboard is improved.
Because the middle plate runner a3 faces the feed inlet, if the flow rate is not limited, the flow rate of the glue in the middle plate runner a3 is greater than the flow rate of the glue in the first outer plate runner a 1/the second outer plate runner a2, in this embodiment, a flow limiting block a31 is arranged in the middle plate runner a3, the flow limiting block a31 is fixedly connected with the middle plate runner a3, the flow limiting block a31 is used for reducing the flow rate of the glue in the middle plate runner a3, and a worker can polish the flow limiting block a31, so that the thickness of the flow limiting block a3 is changed, and the flow rate of the glue in the middle plate runner a3 is adjusted.
In this embodiment, the multi-layer inner cavity extrusion die further includes a core 2, the core 2 includes a mounting block 21, the mounting block 21 is disposed in one end of the extrusion slot 1a away from the extrusion port, the mounting block 21 is fixedly connected to the die body 1, the middle of the mounting block 21 is provided with at least one core runner b3, one end of the core runner b3 is communicated with the middle plate runner a3, and the other end of the core runner b3 is disposed opposite to the extrusion port; two outer wall one-to-ones that the installation piece 21 was carried on the back with surround between two opposite faces of extruding groove 1a and form first core outer flow channel b1, second core outer flow channel b2, the one end of first core outer flow channel b1 with first planking runner a1 intercommunication, the other end of first core outer flow channel b1 extends to the installation piece 21 is close to extrude the one end of mouth, the one end of second core outer flow channel b2 with second planking runner a2 intercommunication, the other end of second core outer flow channel b2 extends to the installation piece 21 is close to extrude the one end of mouth.
The thickness of the middle area of the first outer plate flow channel a1 is smaller than the thickness of the areas on the two sides of the first outer plate flow channel a1, the thickness of the middle area of the second outer plate flow channel a2 is smaller than the thickness of the areas on the two sides of the second outer plate flow channel a2, and the thickness of the middle area of the core body flow channel b3 is smaller than the thickness of the areas on the two sides of the core body flow channel b3, so that the feeding amount of the position far away from the feeding groove 1b is increased, the glue flow of the middle area is prevented from being far larger than that of the glue flow of the areas on the two sides.
The core 2 further comprises at least two diversion plates 22, the two diversion plates 22 are arranged, a middle layer extrusion gap c3 is formed between the opposite surfaces of two adjacent diversion plates 22 at intervals, one end of the middle layer extrusion gap c2 is communicated with one end of the core body flow passage b3 opposite to the extrusion opening, and the other end of the middle layer extrusion gap c3 extends to one end of the extrusion groove a1 close to the extrusion opening; the two farthest-spaced flow dividing plates 22 respectively correspond to two opposite surfaces of the extrusion slot a1 one by one to form a first outer plate extrusion gap c1 and a second outer plate extrusion gap c2, one end of the first outer plate extrusion gap c1 is communicated with one end of the first core outer flow channel b1 close to the extrusion port, and the other end of the first outer plate extrusion gap c1 extends to one end of the extrusion slot 1a close to the extrusion port; one end of the second outer plate extrusion gap c2 is communicated with one end of the second core outer flow passage b2 close to the extrusion port, and the other end of the second outer plate extrusion gap c2 extends to one end of the extrusion groove 1a close to the extrusion port.
The thickness of the diverter plate 22 is gradually reduced from the end close to the extrusion opening to the end far away from the extrusion opening, so that the strength of the diverter plate 22 is improved, and the phenomenon that the tip of the diverter plate 22 is too long and too thin and is easy to bend is avoided.
The number of the middle plate runners a3, the core runners b3 and the middle layer extrusion gaps c3 is the same, one end of each of the core runners b3 is in one-to-one correspondence with the middle plate runners a3 and the other end of each of the core runners b3 is in one-to-one correspondence with the middle layer extrusion gaps c3, so that independent feeding of each layer of wall board is achieved, each feeding runner can independently trim and adjust the flow, and the production quality of the plastic wall board is improved.
Referring to fig. 4 and 5, each of the flow dividing plates 22 includes a plurality of comb teeth 221 arranged side by side, a rib extrusion gap 22a is formed between every two adjacent comb teeth 221 at an interval, and the rib in the multi-layer wall panel is extruded from the rib extrusion gap 22 a.
Referring to fig. 1 and 6, this embodiment further provides a specific implementation manner, in which the wallboard produced by the multi-layer cavity extrusion die of the improved embodiment has an intermediate layer 01, each of the intermediate plate flow passage a3, the core flow passage b3, and the intermediate layer extrusion gap c3 is provided with one, glue sequentially passes through the intermediate plate flow passage a3, the core flow passage b3, and the intermediate layer extrusion gap c3, and finally the intermediate layer of the wallboard is extruded from the intermediate layer extrusion gap c3, the die body 1 includes a first die plate 11, a second die plate 12, and a forming die 13, the first die plate 11, the second die plate 12, and the forming die 13 are sequentially stacked and fixed along a horizontal direction, the forming die 13 includes an upper plate 131, a first middle plate 132, a second middle plate 133, and a lower plate 134 that are sequentially stacked and fixed along a vertical direction, an upper side surface of the upper plate 131 is milled to form an upper portion of the first outer plate flow passage a1 and the first core outer flow passage b1, the upper side of the first middle plate 132 is milled and formed to the lower side portions of the first outer plate flow channel a1 and the first core outer flow channel b1, the lower side of the first middle plate 132 is milled and formed to the lower side portions of the middle plate flow channel a3 and the core flow channel b3, the upper side of the second middle plate 133 is milled and formed to the upper side portions of the middle plate flow channel a3 and the core flow channel b3, the lower side of the second middle plate 133 is milled and formed to the upper side portions of the second outer plate flow channel a2 and the second core outer flow channel b2, the upper side of the lower plate 134 is milled and formed to the lower side portions of the second outer plate flow channel a2 and the second core outer flow channel b2, the four layers of templates are integrally machined, the precision and the structural strength are obviously improved, and the upper plate 131, the first middle plate 132, the second middle plate 133, the lower plate 134, the first middle plate 11 and the second die plate 12 are all fixedly connected by detachable screws, and the later-period trimming and replacement are convenient.
The working principle is as follows: first planking runner a1, second planking runner a2, intermediate plate runner a3 among this multilayer inner chamber extrusion tooling will the glue solution that the feed inlet was injected is shunted, and two outer panel extrusion moulding's of multilayer structure wallboard required sizing material respectively by first planking runner a1, second planking runner a2 supply, and the required sizing material of the middle level 01 extrusion moulding of multilayer structure wallboard by intermediate plate runner a3 supply, separately set up the runner, the independent feed of intermediate plate, the independent feed runner of three-layer, every can all independently maintain the regulation flow (the workman uses the polisher to polish the runner or uses the welding machine to repair the runner), has improved the quality of extruding the wallboard, and the wallboard is finally followed extrusion orifice extrusion moulding.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A multi-layer internal cavity extrusion die, comprising: the mould comprises a mould body, wherein an extrusion groove is formed in one end of the mould body, a feeding groove is formed in the other end of the mould body, one end of the extrusion groove communicated with the outer wall of the mould body is an extrusion port, one end of the feeding groove communicated with the outer wall of the mould body is a feeding port, a first outer plate flow channel, a second outer plate flow channel and an intermediate plate flow channel are arranged in the mould body side by side, at least one intermediate plate flow channel is arranged, the intermediate plate flow channel is arranged between the first outer plate flow channel and the second outer plate flow channel, one end of each of the first outer plate flow channel, the second outer plate flow channel and the intermediate plate flow channel is communicated with one end of the extrusion groove far away from the extrusion port, and the other end of each of the first outer plate flow channel, the second outer plate flow channel and the intermediate plate flow channel is.
2. The multi-layer cavity extrusion die of claim 1, wherein a flow-limiting block is disposed within the middle plate flow channel.
3. The multi-layer inner cavity extrusion die as claimed in claim 1, further comprising a core, wherein the core comprises a mounting block, the mounting block is disposed in one end of the extrusion slot away from the extrusion port and is fixedly connected to the die body, at least one core runner is disposed in a middle portion of the mounting block, one end of the core runner is communicated with the middle plate runner, and the other end of the core runner is disposed opposite to the extrusion port; two outer wall one-to-ones that the installation piece was carried on the back mutually with surround between two opposite faces of extruding the groove and form outer runner of first core, the outer runner of second core, the one end of the outer runner of first core with first planking runner intercommunication the other end of the outer runner of first core extends to the installation piece is close to extrude the one end of mouth, the one end of the outer runner of second core with second planking runner intercommunication the other end of the outer runner of second core extends to the installation piece is close to extrude the one end of mouth.
4. The multi-layer internal cavity extrusion die of claim 3, wherein the thickness of the first core external flow passage is less in the middle region than in the two side regions.
5. The multi-layer internal cavity extrusion die of claim 3, wherein the second core external flow channel has a thickness in a middle region that is less than a thickness in regions on both sides thereof.
6. The multilayer internal cavity extrusion die of claim 3, wherein the thickness of the core flow channel in the middle region is less than the thickness of the core flow channel in the two side regions.
7. The multi-layer inner cavity extrusion die as claimed in claim 3, wherein the core further comprises at least two flow distribution plates, the opposing surfaces of two adjacent flow distribution plates are spaced to form an intermediate layer extrusion gap, one end of the intermediate layer extrusion gap is communicated with one end of the core body flow channel, which is opposite to the extrusion port, and the other end of the intermediate layer extrusion gap extends to one end of the extrusion slot, which is close to the extrusion port; the two shunting plates with the farthest distance respectively correspond to two opposite surfaces of the extrusion groove one by one to form a first outer plate extrusion gap and a second outer plate extrusion gap, one end of the first outer plate extrusion gap is communicated with one end, close to the extrusion opening, of the first core outer flow channel, and the other end of the first outer plate extrusion gap extends to one end, close to the extrusion opening, of the extrusion groove; one end of the second outer plate extrusion gap is communicated with one end, close to the extrusion port, of the second core outer flow channel, and the other end of the second outer plate extrusion gap extends to one end, close to the extrusion port, of the extrusion groove.
8. The multi-layer internal cavity extrusion die of claim 7, wherein the thickness of the splitter plate decreases from the end near the extrusion opening to the end far from the extrusion opening.
9. The multi-layer inner cavity extrusion die of claim 7, wherein the number of the middle plate runners, the core runners and the middle layer extrusion gaps is the same, one end of each of the plurality of core runners is communicated with the plurality of middle plate runners in a one-to-one correspondence, and the other end of each of the plurality of core runners is communicated with the plurality of middle layer extrusion gaps in a one-to-one correspondence.
10. The multi-layer inner cavity extrusion die according to claim 7, wherein each of the splitter plates comprises a plurality of comb-teeth sheets arranged side by side, and a rib extrusion gap is formed between every two adjacent comb-teeth sheets at an interval.
CN201911025564.XA 2019-10-25 2019-10-25 Multilayer inner chamber extrusion tooling Withdrawn CN110722761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911025564.XA CN110722761A (en) 2019-10-25 2019-10-25 Multilayer inner chamber extrusion tooling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911025564.XA CN110722761A (en) 2019-10-25 2019-10-25 Multilayer inner chamber extrusion tooling

Publications (1)

Publication Number Publication Date
CN110722761A true CN110722761A (en) 2020-01-24

Family

ID=69223249

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911025564.XA Withdrawn CN110722761A (en) 2019-10-25 2019-10-25 Multilayer inner chamber extrusion tooling

Country Status (1)

Country Link
CN (1) CN110722761A (en)

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Application publication date: 20200124