CN112123732A - Composite fire-proof strip, manufacturing method and manufacturing device thereof - Google Patents
Composite fire-proof strip, manufacturing method and manufacturing device thereof Download PDFInfo
- Publication number
- CN112123732A CN112123732A CN202010936098.7A CN202010936098A CN112123732A CN 112123732 A CN112123732 A CN 112123732A CN 202010936098 A CN202010936098 A CN 202010936098A CN 112123732 A CN112123732 A CN 112123732A
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- Prior art keywords
- forming
- flow channel
- guide plate
- core material
- manufacturing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 49
- 239000002131 composite material Substances 0.000 title claims abstract description 37
- 239000011257 shell material Substances 0.000 claims abstract description 92
- 239000011162 core material Substances 0.000 claims abstract description 86
- 239000003063 flame retardant Substances 0.000 claims description 10
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910002804 graphite Inorganic materials 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000010583 slow cooling Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000009970 fire resistant effect Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 20
- 238000001125 extrusion Methods 0.000 abstract description 3
- 238000010112 shell-mould casting Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Images
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
- E06B5/16—Fireproof doors or similar closures; Adaptations of fixed constructions therefor
- E06B5/164—Sealing arrangements between the door or window and its frame, e.g. intumescent seals specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
- B29K2105/0026—Flame proofing or flame retarding agents
-
- 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
- B29L2031/00—Other particular articles
- B29L2031/26—Sealing devices, e.g. packaging for pistons or pipe joints
- B29L2031/265—Packings, Gaskets
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a composite fire-proof strip, a manufacturing method and a manufacturing device thereof. The shell material forming flow channel and the core material forming flow channel are communicated at the discharge end of the forming die, so that the shell material and the core material are contacted at the discharge end, and a gap between the shell material and the core material is filled, so that the core material is filled in a cavity formed by surrounding the shell material, and the situation that the core material is not filled actually is avoided. The manufacturing device simultaneously leads in the shell material and the core material, and realizes one-time extrusion molding by utilizing the shell material molding flow passage and the core material molding flow passage, thereby improving the production efficiency, reducing the labor cost, and also having the advantages of easy operation and simple and reliable manufacture.
Description
Technical Field
The invention relates to the technical field of fireproof equipment manufacturing, in particular to a composite fireproof strip, a manufacturing method and a manufacturing device thereof.
Background
The fire-proof strip is mainly used at the connection part of the entrance of doors and windows. When a fire disaster occurs, the carbon foam formed by the rubber strip when meeting thermal expansion has viscosity, does not ash and run off or fall off, and has slow burning speed. The expansion area is large, can be enlarged to 15-20 times of the original expansion area, can be expanded in all directions or in main one-way, completely fills gaps around, forms a good heat insulation layer, effectively blocks the spread of dense smoke, toxic gas, fire behavior and hot gas of a fire disaster, and creates an effective fire-proof and smoke-proof barrier.
Traditional fire prevention strip, simple structure, the style is single, is difficult to adapt to the complex environment of various differences. Although the composite fire-proof strip has various styles and can adapt to various complex environments, the composite fire-proof strip is difficult to manufacture and form at one time, and when the core material of the composite fire-proof strip is filled, because the cavity for filling the core material is large, the problem of infirmity filling such as cavities is easy to generate, and because the manufacturing difficulty is high, the manufacturing cost is high.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a composite fire-proof strip which can be formed at one time, is filled with full core material and is easy to manufacture and implement, a manufacturing method thereof and a manufacturing device thereof.
In order to solve the technical problems, the invention adopts the following technical scheme:
the shell material forming flow channel and the core material forming flow channel are communicated at the discharge end of the forming die, so that the core material is filled in a cavity formed by the shell material in a surrounding mode and is extruded into the composite fire-proof strip at one time.
As a further improvement of the above technical solution:
the forming die comprises a connecting seat and a forming part, the connecting seat is fixedly arranged on the forming part, the forming part comprises a first guide plate, a second guide plate, a third guide plate and a forming plate, the first guide plate, the second guide plate and the third guide plate are sequentially and fixedly connected through bolts, the connecting seat is fixedly arranged on the first guide plate, and the forming plate is arranged on the third guide plate in a detachable connection mode.
The first guide plate is provided with a shell forming flow channel communicated with the connecting seat, and a core forming flow channel is arranged on one side of the shell forming flow channel.
The second guide plate is provided with a shell material forming flow channel which is communicated with the shell material forming flow channel of the first guide plate and is arranged in a split mode, and the core material forming flow channel of the second guide plate is communicated with the core material forming flow channel of the first guide plate and is arranged in the middle of the geometric pattern surrounded by the split shell material forming flow channel.
And one end of the third guide plate is provided with a shell material forming flow channel and a core material forming flow channel which are communicated with the second guide plate, the other end of the third guide plate is provided with a dovetail groove connected with the forming plate, and the shell material forming flow channel and the core material forming flow channel are communicated at the discharge end.
The forming plate is inserted into a dovetail groove of the third guide plate, and a forming channel communicated with the third guide plate is arranged on the forming plate.
The forming part is sleeved with a heater.
A composite fire-proof strip manufacturing method based on the manufacturing device comprises the following steps:
s1: preparing materials, namely preparing a shell material and a core material into a molten state and connecting the shell material and the core material to a feed inlet of a forming die;
s2: extruding, namely injecting the shell material and the core material into a forming die from a feeding hole on the forming die respectively, so that the shell material is divided to surround the periphery of the core material, the shell material is gradually integrated and envelops the core material along with the propelling of the shell material, and finally the shell material and the core material extend out from a discharging hole together;
s3: and (5) shaping, namely cooling the product at the discharge port until shaping.
As a further improvement of the above technical solution:
in step S2, the mold is heated and kept warm.
In step S3, cooling is performed by a slow cooling method.
The shell material is flame-retardant PVC, and the core material is expanded graphite.
A composite fire-proof strip is manufactured by the manufacturing device.
A composite fire-proof strip is prepared by the manufacturing method.
Compared with the prior art, the invention has the advantages that:
the manufacturing device of the composite fire-proof strip respectively injects the shell material and the core material into the shell material forming flow passage and the core material forming flow passage, and leads the shell material to surround the core material and push towards the discharge end together. The shell material forming flow channel and the core material forming flow channel are communicated at the discharge end of the forming die, so that the shell material and the core material are contacted at the discharge end, and a gap between the shell material and the core material is filled, so that the core material is filled in a cavity formed by surrounding the shell material, and the situation that the core material is not filled actually is avoided. The manufacturing device simultaneously introduces the shell material and the core material, and realizes one-step extrusion molding by utilizing the shell material molding flow passage and the core material molding flow passage, thereby improving the production efficiency and reducing the labor cost.
The manufacturing method of the composite fire-proof strip is based on the manufacturing device of the composite fire-proof strip, so that the manufacturing device has the advantages of being easy to operate and simple and reliable to manufacture.
Drawings
Fig. 1 is a schematic sectional structure view of a manufacturing apparatus of a composite fire strip.
Fig. 2 is a schematic front view of a first baffle.
Fig. 3 is a schematic cross-sectional view of a first baffle.
Fig. 4 is a schematic front view of a second baffle.
Fig. 5 is a rear view schematic diagram of a second baffle.
Fig. 6 is a schematic cross-sectional view of a second baffle.
Fig. 7 is a schematic front view of a third baffle.
Fig. 8 is a sectional structural view of the third guide plate.
Fig. 9 is a front view structure diagram of the forming plate.
Fig. 10 is a schematic sectional structure view of the forming plate.
Illustration of the drawings:
1. forming a mould; 11. a shell material forming flow channel; 12. a core material forming flow channel; 13. a connecting seat; 14. a molding section; 141. a first baffle; 142. a second baffle; 143. a third baffle; 144. forming a plate; 1441. forming a channel; 2. a bolt; 3. a heater.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
As shown in fig. 1 to 10, the manufacturing apparatus of the composite fire-proof strip of the embodiment includes a forming die 1, a shell forming flow channel 11 for introducing shell material and a core forming flow channel 12 for introducing core material are provided in the forming die 1, the shell forming flow channel 11 surrounds the outside of the core forming flow channel 12, the shell forming flow channel 11 and the core forming flow channel 12 are communicated with the discharging end of the forming die 1, so that the core material is filled in the cavity surrounded by the shell material, and the composite fire-proof strip is extruded at one time. The shell material and the core material are respectively injected into the shell material forming runner 11 and the core material forming runner 12, and the shell material and the core material are pushed to the discharging end together by surrounding the shell material. The shell forming flow passage 11 and the core forming flow passage 12 are communicated at the discharge end of the forming die 1, so that the shell and the core are contacted at the discharge end, and a gap between the shell and the core is filled, so that the core is filled in a cavity formed by surrounding the shell, and the situation that the core is not filled actually is avoided. The manufacturing device simultaneously introduces the shell material and the core material, and realizes one-step extrusion molding by utilizing the shell material molding runner 11 and the core material molding runner 12, thereby improving the production efficiency and reducing the labor cost.
In this embodiment, the forming die 1 includes a connecting seat 13 and a forming portion 14, the connecting seat 13 is fixedly mounted on the forming portion 14, and the connecting seat 13 is further used for connecting the forming die 1 with the shell material feeding port. The forming part 14 comprises a first guide plate 141, a second guide plate 142, a third guide plate 143 and a forming plate 144, the first guide plate 141, the second guide plate 142 and the third guide plate 143 are sequentially and fixedly connected through bolts 2, the connecting seat 13 is fixedly installed on the first guide plate 141, and the forming plate 144 is installed on the third guide plate 143 in a detachable connection mode, so that the forming plate 144 is convenient to detach and debug.
In this embodiment, the first guide plate 141 is provided with a shell forming flow passage 11 communicated with the connecting seat 13, and a core forming flow passage 12 is provided at one side of the shell forming flow passage 11. The shell material is introduced into the shell material forming flow passage 11 of the first guide plate 141 through the shell material forming flow passage 11 of the connecting seat 13. The core material forming flow passage 12 is arranged on one side of the shell material forming flow passage 11, so that the core material forming flow passage 12 is separated from the shell material forming flow passage 11, and the shell material and the core material are prevented from mixing in series.
In this embodiment, the second flow guiding plate 142 is provided with a shell forming flow channel 11 which is communicated with the shell forming flow channel 11 of the first flow guiding plate 141 and arranged in a split manner, so that the shell is formed along the split shell forming flow channel 11, and a cavity for accommodating the core material is generated in the center of the shell. The core material forming flow channel 12 of the second flow guide plate 142 is communicated with the core material forming flow channel 12 of the first flow guide plate 141 and is arranged in the middle of the geometric pattern surrounded by the split shell material forming flow channel 11. The core material is injected into the cavity surrounded by the split shell material forming flow passage 11 from the core material forming flow passage of the second flow guide plate 142.
In this embodiment, one end of the third flow guiding plate 143 is provided with the shell molding flow channel 11 and the core molding flow channel 12 which are communicated with the second flow guiding plate 142, and the other end is provided with a dovetail groove connected with the molding plate 144, which is convenient for the assembly and disassembly of the molding plate 144 and adjustment of the dovetail groove to the relative position of the molding plate 144. The shell forming runner 11 and the core forming runner 12 are communicated at the discharge end, so that the shell and the core are contacted with the discharge end, the combination of the shell and the core is enhanced, the gap between the shell and the core can be filled with the core, and the infirmity of the core is prevented.
In this embodiment, the forming plate 144 is inserted into the dovetail groove of the third baffle 143, and the forming plate 144 is provided with a forming passage 1441 communicated with the third baffle 143. The molding passage 1441 performs final molding on the shell material at the discharge end of the third guide plate 143 to ensure that the shell material forms a closed loop and envelops the core material.
In this embodiment, the heater 3 is fitted to the molding portion 14. The heater 3 keeps heating and heat preservation on the molding part 14, and ensures that the shell material and the core material are in a molten state or a semi-molten state which is easy to process.
Based on the manufacturing apparatus of the composite fire-retardant strip in the above embodiments, the present embodiment provides a manufacturing method of a composite fire-retardant strip. In this example, the shell material was flame retardant PVC and the core material was expanded graphite. Preparing flame-retardant PVC and expanded graphite into a molten state, introducing the molten PVC and the expanded graphite into a feed inlet of a forming die 1, and heating and insulating the forming die 1; the flame retardant PVC is split-molded by the split-type shell molding runner 11 provided on the second guide plate 142 of the molding die 1, and the split-type shell molding runner 11 surrounds the core molding runner 12 containing the expanded graphite. When the flame-retardant PVC is pushed towards the discharge end, gaps among the petals are gradually reduced along with the change of the split-type shell molding runner 11. And the discharge ends of the third guide plates 143 are communicated with each other to form a closed shell. The expanded graphite is also in contact with the flame-retardant PVC and fills the gap between the expanded graphite and the flame-retardant PVC. Finally, the final molding is carried out through the molding passage 1441 of the molding plate 144, and the final molded product is cooled to be shaped by adopting a slow cooling mode, so that the composite fireproof strip is prepared.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-described embodiments. Modifications and variations that may occur to those skilled in the art without departing from the spirit and scope of the invention are to be considered as within the scope of the invention.
Claims (13)
1. The utility model provides a manufacturing installation of compound fire prevention strip which characterized in that: the composite fireproof strip is characterized by comprising a forming die (1), wherein a shell material forming flow channel (11) and a core material forming flow channel (12) are arranged in the forming die (1), the shell material forming flow channel (11) is communicated with the core material forming flow channel (12) in an enclosing mode, the shell material forming flow channel (11) and the core material forming flow channel (12) are communicated with the discharge end of the forming die (1), and the core material is filled in a cavity formed by enclosing of the shell material and is extruded into the composite fireproof strip at one time.
2. A device for manufacturing a composite fire strip according to claim 1, characterised in that: the forming die (1) comprises a connecting seat (13) and a forming part (14), the connecting seat (13) is fixedly arranged on the forming part (14), the forming part (14) comprises a first guide plate (141), a second guide plate (142), a third guide plate (143) and a forming plate (144), the first guide plate (141), the second guide plate (142) and the third guide plate (143) are sequentially and fixedly connected through bolts (2), the connecting seat (13) is fixedly arranged on the first guide plate (141), and the forming plate (144) is arranged on the third guide plate (143) in a detachable connection mode.
3. A device for manufacturing a composite fire strip according to claim 2, characterised in that: the first guide plate (141) is provided with a shell forming flow channel (11) communicated with the connecting seat (13), and a core forming flow channel (12) is arranged on one side of the shell forming flow channel (11).
4. A device for manufacturing a composite fire strip according to claim 3, characterised in that: the second guide plate (142) is provided with a shell material forming flow channel (11) which is communicated with the shell material forming flow channel (11) of the first guide plate (141) and is arranged in a split mode, and the core material forming flow channel (12) of the second guide plate (142) is communicated with the core material forming flow channel (12) of the first guide plate (141) and is arranged in the middle of a geometric pattern surrounded by the split type shell material forming flow channel (11).
5. A device for manufacturing a composite fire strip according to claim 4, characterised in that: and one end of the third guide plate (143) is provided with a shell material forming flow channel (11) and a core material forming flow channel (12) which are communicated with the second guide plate (142), the other end of the third guide plate is provided with a dovetail groove connected with the forming plate (144), and the shell material forming flow channel (11) and the core material forming flow channel (12) are communicated at the discharge end.
6. A device for manufacturing a composite fire strip according to claim 5, characterised in that: the forming plate (144) is inserted into a dovetail groove of the third guide plate (143), and the forming plate (144) is provided with a forming channel (1441) communicated with the third guide plate (143).
7. A device for manufacturing a composite fire strip according to any one of claims 1 to 6, characterised in that: the forming part (14) is sleeved with a heater (3).
8. A method for manufacturing a composite fire protection strip based on the manufacturing apparatus of any one of claims 1 to 6, comprising the steps of:
s1: preparing materials, namely preparing a shell material and a core material into a molten state and connecting the shell material and the core material to a feed inlet of a forming die (1);
s2: extruding, namely injecting the shell material and the core material into the forming die (1) from a feeding hole on the forming die (1) respectively, so that the shell material is divided and surrounds the periphery of the core material, the shell material is gradually combined into a whole along with the propelling of the shell material and envelops the core material, and finally the shell material and the core material are extended out from a discharging hole together;
s3: and (5) shaping, namely cooling the product at the discharge port until shaping.
9. The method of manufacturing a composite fire strip of claim 8, wherein: in step S2, the mold (1) is heated and held at a constant temperature.
10. The method of manufacturing a composite fire strip of claim 8, wherein: in step S3, cooling is performed by a slow cooling method.
11. The method of manufacturing a composite fire strip of claim 8, wherein: the shell material is flame-retardant PVC, and the core material is expanded graphite.
12. A composite fire-proof strip is characterized in that: the composite fire-resistant strip is manufactured by the manufacturing device of any one of claims 1 to 7.
13. A composite fire-proof strip is characterized in that: the composite fire-proof strip is manufactured by the manufacturing method of any one of claims 8 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010936098.7A CN112123732A (en) | 2020-09-08 | 2020-09-08 | Composite fire-proof strip, manufacturing method and manufacturing device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010936098.7A CN112123732A (en) | 2020-09-08 | 2020-09-08 | Composite fire-proof strip, manufacturing method and manufacturing device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112123732A true CN112123732A (en) | 2020-12-25 |
Family
ID=73846232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010936098.7A Pending CN112123732A (en) | 2020-09-08 | 2020-09-08 | Composite fire-proof strip, manufacturing method and manufacturing device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112123732A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2202484A (en) * | 1987-03-20 | 1988-09-28 | Keith Richard Patterson | Extruding sheaths around intumescent cores |
| CN2510272Y (en) * | 2001-12-24 | 2002-09-11 | 中国科学院西安光学精密机械研究所 | Plastic-optical fiber double-extrusion die |
| CN101293389A (en) * | 2007-04-23 | 2008-10-29 | 李飞宇 | Injection nozzle for sandwich closestool cover plate injection molding technique |
| CN107553857A (en) * | 2017-10-20 | 2018-01-09 | 南昌工程学院 | A kind of gas for Polymer Processing aids in micro- coextrusion mold device |
-
2020
- 2020-09-08 CN CN202010936098.7A patent/CN112123732A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2202484A (en) * | 1987-03-20 | 1988-09-28 | Keith Richard Patterson | Extruding sheaths around intumescent cores |
| CN2510272Y (en) * | 2001-12-24 | 2002-09-11 | 中国科学院西安光学精密机械研究所 | Plastic-optical fiber double-extrusion die |
| CN101293389A (en) * | 2007-04-23 | 2008-10-29 | 李飞宇 | Injection nozzle for sandwich closestool cover plate injection molding technique |
| CN107553857A (en) * | 2017-10-20 | 2018-01-09 | 南昌工程学院 | A kind of gas for Polymer Processing aids in micro- coextrusion mold device |
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Application publication date: 20201225 |
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