CN104139506A - Vacuum-pumping-free plastic pipe extrusion die - Google Patents
Vacuum-pumping-free plastic pipe extrusion die Download PDFInfo
- Publication number
- CN104139506A CN104139506A CN201410372007.6A CN201410372007A CN104139506A CN 104139506 A CN104139506 A CN 104139506A CN 201410372007 A CN201410372007 A CN 201410372007A CN 104139506 A CN104139506 A CN 104139506A
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- CN
- China
- Prior art keywords
- mould
- cooling
- cover
- core rod
- cooling sizing
- Prior art date
- 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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Classifications
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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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
-
- 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
- B29C48/14—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration
- B29C48/147—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration after the die nozzle
- B29C48/1474—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration after the die nozzle at a calibration zone
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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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
-
- 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
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
- B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
- B29C2033/042—Meander or zig-zag shaped cooling channels, i.e. continuous cooling channels whereby a plurality of cooling channel sections are oriented in a substantial parallel direction
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9115—Cooling of hollow articles
- B29C48/912—Cooling of hollow articles of tubular films
- B29C48/913—Cooling of hollow articles of tubular films externally
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of plastic pipe production, in particular to a vacuum-pumping-free plastic pipe extrusion die which comprises a die shaping part, a cooling sizing part, a shaping sleeve with the tapered inner wall. The die shaping part is connected with the cooling sizing part, and the cooling sizing part is connected with the shaping sleeve with the tapered inner wall. The die shaping part and the cooling sizing part form a whole, and the shaping sleeve with the tapered inner wall is arranged outside the cooling sizing part. The die is composed of the shaping part and the cooling sizing part, the cooling sizing part and a die head are connected into a whole, and space is saved. A spiral circulating cooling water pathway is adopted for the die cooling part, the cooling speed is high, and the primary cooling sizing treatment of the die can be achieved.
Description
Technical field
The present invention relates to the technical field that plastic pipe is produced, more specifically, relate to a kind of plastic tube extrusion mould of exempting to vacuumize.
Background technology
Traditional plastic pipe production procedure generally by extruder extrude, through mould shape, vacuumize that sizing, cooler bin are cooling, coding cutting, packing etc. form.Conventionally mould shape with cooling be what separate, mould can only be shaped roughly, follow-up needs vacuumize sizing sizing, vaccum-pumping equipment structure is many and mix, and complex operation, occupation of land space greatly, production equipment cost is higher, energy resource consumption is more.
Summary of the invention
The present invention is at least one defect overcoming described in above-mentioned prior art, and a kind of plastic tube extrusion mould of exempting to vacuumize is provided, and it,, in the mould inside supercharging of blowing, produces pressure differential sizing, does not need to vacuumize sizing.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind ofly exempt to vacuumize plastic tube extrusion mould, wherein, the shaping cover that comprises mould shape part, cooling sizing part, inner wall belt tapering, mould shape part is partly connected with cooling sizing, and cooling sizing part is connected with the shaping cover of inner wall belt tapering;
Mould shape part is in aggregates with cooling sizing part shape, and the shaping cover of inner wall belt tapering is located at the outside of cooling sizing part.
In the present invention, mould shape part is in aggregates with cooling sizing part shape, adopt spiral circulation cooling water runner cooling fast on mould, raw material is extruded after mould can realize sizing sizing substantially simultaneously, more further cooling by the cooling water tank that inner wall belt tapering shaping cover is housed.
Further, described mould shape partly comprises die holder, be located at spreader in die holder, be located at die holder one side contraction cover, be located at the mouth mould that shrinks cover opposite side, be located at the core rod shrinking in cover and mouthful mould;
Core rod and a mouthful mould extend to cooling sizing part and are connected with it;
Mould shape part also comprises inlet suction port, and inlet suction port is connected with the contraction cover passage in shrinking cover, shrinks cover passage and is connected with the spreader passage in spreader; In core rod, be provided with gas channel, gas channel one end connects spreader passage, and the other end extends to cooling sizing part and is connected with it.
Further, described mould shape part also comprises a mouthful moulded board, and a mouthful moulded board connects and fixes and shrinks cover and a mouthful mould.
Further, described cooling sizing partly comprises supercharging core rod, be located at lower coolant jacket outside supercharging core rod, be located at the upper coolant jacket outside lower coolant jacket, and upper coolant jacket is provided with warter connection;
Described core rod is connected with supercharging core rod, gas channel and supercharging core rod internal communication.Between described upper coolant jacket and lower coolant jacket, be provided with O-ring seal.
In the present invention, gas channel through mould inside, to mould inside air blowing supercharging, raw materials melt is shaped by core rod and a mouthful mould, and supercharging core rod to be arrived position, due to mould inside supercharging, tubing sizing under the effect of pressure differential, under the effect of mould supercharging core rod position spiral circulation water, tubing is cooling preliminary sizing sizing fast, then through the cooling water tank the final shaping sizing of inner wall belt tapering shaping cover, can complete the production of tubing.
The cooling sizing of the present invention partly adopts spiral cooling water channel capable of circulation cooling, adopts the shaping cover secondary cooling and shaping of inner wall belt tapering; Can be to the mould inside supercharging of blowing, the raw material that forms air pressure official post molten condition is shaped between core rod and mouth mould;
The present invention does not need to vacuumize sizing, has saved the outside equipment vacuumizing simultaneously, saves device fabrication cost, and mould adopts spiral cooling water channel capable of circulation cooling, makes cool time short, and cooling effect is better; When this mould is produced tubing, can realize the process that completes preliminary sizing sizing on mould; When this mould is produced tubing, can reduce the use of cooling water tank and vaccum-pumping equipment, greatly save production equipment manufacturing cost and equipment placing space, reduce energy resource consumption high, save production cost.
Compared with prior art, beneficial effect is:
1, this mould is comprised of shape part and cooling sizing two departments, and cooling sizing part is connected to form an integral body with die head, saves space.
2, this mould adopts inner mode supercharging of blowing, and produces the sizing of pressure official post tubing.
3, this mold cools down partly adopts spiral cooling water channel capable of circulation, and cooling velocity is fast, can realize preliminary cooling sizing on mould.
4, preliminary cooling after again by water tank with the shaping cover of tapering, can better shape and improve the fineness of tube surfaces.
5, adopt this new type plastic pipe production mould to produce the use that tubing can be saved greatly vaccum-pumping equipment and reduce cooling water tank, also reduce the auxiliary equipment vacuumizing, save device fabrication cost, also reduce the use of the device space and the consumption of the energy, reduced production cost and maintenance cost simultaneously.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is shaping cover structural representation of the present invention.
The specific embodiment
Accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent; For better explanation the present embodiment, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product; To those skilled in the art, in accompanying drawing some known configurations and explanation thereof may to omit be understandable.In accompanying drawing, describe position relationship only for exemplary illustration, can not be interpreted as the restriction to this patent.
As shown in Figure 1, 2, exempt to vacuumize a plastic tube extrusion mould, wherein, comprise the shaping cover 13 of mould shape part, cooling sizing part, inner wall belt tapering, mould shape part is partly connected with cooling sizing, and cooling sizing part is connected with the shaping cover 13 of inner wall belt tapering;
Mould shape part is in aggregates with cooling sizing part shape, and the shaping cover 13 of inner wall belt tapering is located at the outside of cooling sizing part.
Mould shape partly comprises die holder 1, be located at spreader 2 in die holder 1, be located at die holder 1 one sides contraction cover 3, be located at the mouth mould 6 that shrinks cover 3 opposite sides, be located at the core rod 5 shrinking in cover 3 and mouthful mould 6;
Core rod 5 and a mouthful mould 6 extend to cooling sizing part and are connected with it;
Mould shape part also comprises inlet suction port 10, and inlet suction port 10 is connected with the contraction cover passage 31 in shrinking cover 3, shrinks cover passage 31 and is connected with the spreader passage 21 in spreader 2; In core rod 5, be provided with gas channel 14, gas channel 14 one end connect spreader passage 21, and the other end extends to cooling sizing part and is connected with it.
In the present embodiment, air-flow through inlet suction port 10, contraction cover passage 31, spreader passage 21, gas channel 14, is delivered to supercharging core rod 7 successively.
Mould shape part also comprises mouthful moulded board 4, and a mouthful moulded board 4 connects and fixes and shrinks cover 3 and a mouthful mould 6.
Cooling sizing partly comprises supercharging core rod 7, be located at lower coolant jacket 9 outside supercharging core rod 7, be located at the upper coolant jacket 8 outside lower coolant jacket 9, and upper coolant jacket 8 is provided with warter connection 11;
Core rod 5 is connected with supercharging core rod 7, gas channel 14 and supercharging core rod 7 internal communication.Between upper coolant jacket 8 and lower coolant jacket 9, be provided with O-ring seal 12.
In the present embodiment, adopt the novel mode of inner air blowing supercharging to shape to tubing, cooling sizing part is partly connected to form integral body with mould shape, on mould, can realize cooling, because this cooling sizing partly adopts spiral cooling water channel capable of circulation cooling, make its cooling velocity fast, can realize the preliminary sizing of tubing on mould, the preliminary sizing of tubing is by the follow-up further cooling production that can realize whole tubing of cooling water tank through inner wall belt tapering shaping cover.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.All any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in the protection domain of the claims in the present invention.
Claims (5)
1. exempt to vacuumize plastic tube extrusion mould for one kind, it is characterized in that, the shaping cover (13) that comprises mould shape part, cooling sizing part, inner wall belt tapering, mould shape part is partly connected with cooling sizing, and cooling sizing part is connected with the shaping cover (13) of inner wall belt tapering;
Mould shape part is in aggregates with cooling sizing part shape, and the shaping cover of inner wall belt tapering (13) is located at the outside of cooling sizing part.
2. a kind of plastic tube extrusion mould of exempting to vacuumize according to claim 1, it is characterized in that: described mould shape partly comprises die holder (1), be located at spreader (2) in die holder (1), be located at die holder (1) one side contraction cover (3), be located at the mouth mould (6) that shrinks cover (3) opposite side, be located at the core rod (5) shrinking in cover (3) and mouthful mould (6);
Core rod (5) and a mouthful mould (6) extend to cooling sizing part and are connected with it;
Mould shape part also comprises inlet suction port (10), and inlet suction port (10) is connected with the contraction cover passage (31) in shrinking cover (3), shrinks cover passage (31) and is connected with the spreader passage (21) in spreader (2); In core rod (5), be provided with gas channel (14), gas channel (14) one end connects spreader passage (21), and the other end extends to cooling sizing part and is connected with it.
3. a kind of plastic tube extrusion mould of exempting to vacuumize according to claim 2, is characterized in that: described mould shape part also comprises a mouthful moulded board (4), and a mouthful moulded board (4) connects and fixes and shrinks cover (3) and a mouthful mould (6).
4. a kind of plastic tube extrusion mould of exempting to vacuumize according to claim 3, it is characterized in that: described cooling sizing partly comprises supercharging core rod (7), is located at the outer lower coolant jacket (9) of supercharging core rod (7), is located at the outer upper coolant jacket (8) of lower coolant jacket (9), and upper coolant jacket (8) is provided with warter connection (11);
Described core rod (5) is connected with supercharging core rod (7), gas channel (14) and supercharging core rod (7) internal communication.
5. a kind of plastic tube extrusion mould of exempting to vacuumize according to claim 4, is characterized in that: between described upper coolant jacket (8) and lower coolant jacket (9), be provided with O-ring seal (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410372007.6A CN104139506B (en) | 2014-07-31 | 2014-07-31 | One exempts from evacuation plastic tube extrusion mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410372007.6A CN104139506B (en) | 2014-07-31 | 2014-07-31 | One exempts from evacuation plastic tube extrusion mould |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104139506A true CN104139506A (en) | 2014-11-12 |
| CN104139506B CN104139506B (en) | 2016-10-12 |
Family
ID=51848917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410372007.6A Active CN104139506B (en) | 2014-07-31 | 2014-07-31 | One exempts from evacuation plastic tube extrusion mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104139506B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108189367A (en) * | 2018-03-19 | 2018-06-22 | 浙江恒烨新材料科技有限公司 | One kind improves device based on extruder screw |
| CN108705757A (en) * | 2018-05-29 | 2018-10-26 | 云南联塑科技发展有限公司 | A kind of PVC-U supplying drainages inner wall cooling and shaping device |
| CN111391265A (en) * | 2020-04-07 | 2020-07-10 | 海信视像科技股份有限公司 | Television, manufacturing method of lower front shell of television and extrusion molding device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4088724A (en) * | 1973-05-12 | 1978-05-09 | Hoechst Aktiengesellschaft | External sizing and cooling of extruded tubular profiles of thermoplastic material |
| JPS54127467A (en) * | 1978-03-27 | 1979-10-03 | Showa Yuka Kk | Sizing sleeve |
| CN202702574U (en) * | 2012-08-16 | 2013-01-30 | 天津滨海利德制管有限公司 | Speed-up mould for pipe extrusion |
| CN204054594U (en) * | 2014-07-31 | 2014-12-31 | 南京联塑科技实业有限公司 | One is exempted to vacuumize plastic tube extrusion mould |
-
2014
- 2014-07-31 CN CN201410372007.6A patent/CN104139506B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4088724A (en) * | 1973-05-12 | 1978-05-09 | Hoechst Aktiengesellschaft | External sizing and cooling of extruded tubular profiles of thermoplastic material |
| JPS54127467A (en) * | 1978-03-27 | 1979-10-03 | Showa Yuka Kk | Sizing sleeve |
| CN202702574U (en) * | 2012-08-16 | 2013-01-30 | 天津滨海利德制管有限公司 | Speed-up mould for pipe extrusion |
| CN204054594U (en) * | 2014-07-31 | 2014-12-31 | 南京联塑科技实业有限公司 | One is exempted to vacuumize plastic tube extrusion mould |
Non-Patent Citations (1)
| Title |
|---|
| 刘瑞霞: "《塑料挤出成型 第一版》", 31 May 2005, article "挤出成型" * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108189367A (en) * | 2018-03-19 | 2018-06-22 | 浙江恒烨新材料科技有限公司 | One kind improves device based on extruder screw |
| CN108705757A (en) * | 2018-05-29 | 2018-10-26 | 云南联塑科技发展有限公司 | A kind of PVC-U supplying drainages inner wall cooling and shaping device |
| CN111391265A (en) * | 2020-04-07 | 2020-07-10 | 海信视像科技股份有限公司 | Television, manufacturing method of lower front shell of television and extrusion molding device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104139506B (en) | 2016-10-12 |
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