CN103707483B - A kind of device prevented at mouth mould position generation carbide in granulation process - Google Patents
A kind of device prevented at mouth mould position generation carbide in granulation process Download PDFInfo
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- CN103707483B CN103707483B CN201310727897.3A CN201310727897A CN103707483B CN 103707483 B CN103707483 B CN 103707483B CN 201310727897 A CN201310727897 A CN 201310727897A CN 103707483 B CN103707483 B CN 103707483B
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- Prior art keywords
- mouth
- polyamide
- nib
- carbide
- granulation process
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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
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention provides a kind of device preventing to produce in mouth mould position in granulation process carbide, it is characterized in that, comprise mouth template and admission line, described mouth template has nib, and the outlet of admission line is positioned at the position above gas skirt nib.The present invention is used in the technological process of polyamide or modified polyamide granulation, polyamide melt body or modified polyamide melt can be prevented easily to be attached on around mouthful mould, under in the high temperature and air of mouth mould, oxygen acts on for a long time, be attached on the oxidized variable color of polyamide melt body around discharging Tiaokou mould, jaundice, even blackening.Thus prevent when polyamide or modified polyamide product Injection moulded part, article surface produces the flaw of heterochromatic class, substantially increases the accepted product percentage of Injection moulded part.
Description
Technical field
The present invention relates to a kind of device for preventing to produce in mouth mould position in polyamide granulation and modified polyamide modification granulation process carbide.Be particularly useful for the modified polyamide of extruder cold drawn bar pelletizing.
Background technology
In prior art; polyamide granulation or the granulation of polyamide modified mostly use cold drawn bar; polyamide melt is in outlet mold process; a little polyamide melt or modified polyamide melt is had easily to be attached on around mouthful mould; under in the high temperature and air of mouth mould, oxygen acts on for a long time; be attached on the oxidized variable color of polyamide melt around discharging Tiaokou mould, jaundice, even blackening.When the melt sticked is assembled abundant around mouth mould time, oxidation stain is gathered in the material around mouthful mould by the material strip adhesive tape of firm outlet mold in finished product.When the product produced be true qualities or light color time, the carbide around the mouth mould of jaundice and blackout is just obvious especially in the product, and when finished product Injection moulded part, article surface is easy to the flaw producing heterochromatic class, greatly reduces the accepted product percentage of Injection moulded part.
Summary of the invention
The object of this invention is to provide a kind of device preventing to produce in mouth mould position in granulation process carbide; for preventing the polyamide melt oxidized variable color be attached in granulation process around discharging Tiaokou mould when polyamide granulation or polyamide modified granulation; jaundice; blackening; produce carbide; thus preventing polyamide particles or modified polyamide particle when finished product Injection moulded part, article surface produces the flaw of heterochromatic class, thus improves the qualification rate of Injection moulded part.
To achieve these goals, the invention provides a kind of device preventing to produce in mouth mould position in granulation process carbide, it is characterized in that, comprise mouth template and admission line, described mouth template has nib, and the outlet of admission line is positioned at the position above gas skirt nib.
Preferably, produce the device of carbide also comprise gas skirt in described prevention granulation process in mouth mould position, gas skirt to be located on front side of mouth template and to be formed a cavity with mouth template.
More preferably, described gas skirt comprises telescoping shoring column, U-shaped cover and baffle plate, and U-shaped cover is fixed on telescoping shoring column, and the front side of U-shaped cover is provided with baffle plate, and the caulking groove that can be embedded into feed channel is left at the top of U-shaped cover.
More preferably, top and the side of described mouth template have " L " shape chute, gas skirt can be with " L " shape chute coordinates.
Preferably, described admission line comprises main pipeline and branch pipe(tube), and one end of main pipeline connects air induction hose, and the other end blocks, and branch pipe(tube) connects main pipeline, and the outlet of branch pipe(tube) is located at the position of the 1cm ~ 3cm above the nib of mouth template.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention is used in the technological process of polyamide or modified polyamide granulation, polyamide melt or modified polyamide melt can be prevented easily to be attached on around mouthful mould, under in the high temperature and air of mouth mould, oxygen acts on for a long time, be attached on the oxidized variable color of polyamide melt around discharging Tiaokou mould, jaundice, even blackening.Thus prevent when polyamide or modified polyamide product Injection moulded part, article surface produces the flaw of heterochromatic class, substantially increases the accepted product percentage of Injection moulded part.
Accompanying drawing explanation
Fig. 1 is the apparatus structure schematic diagram producing carbide in prevention granulation process in mouth mould position;
Fig. 2 is the schematic diagram of mouth template of the present invention;
Fig. 3 is the schematic diagram of gas skirt of the present invention;
Fig. 4 is the schematic diagram of admission line of the present invention.
Wherein, 10, mouth template, 11, gas skirt, 12, admission line, 13, material strip, 20, chute, 21, nib, 30, support, 31, U-shaped cover, 32, baffle plate, 33, caulking groove, 40, main pipeline, 41, branch pipe(tube).
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described.
Embodiment
As shown in Figure 1, for producing the apparatus structure schematic diagram of carbide in prevention granulation process in mouth mould position, the device producing carbide in described prevention granulation process in mouth mould position comprises mouth template 10, gas skirt 11 and admission line 12, as shown in Figure 2, the middle part of described mouth template 10 has nib 21, top and the side of mouth template 10 have " L " shape chute 20, " L " and shape chute 20 for gas skirt 11 coordinate reduce gas leakage, nib 21 on mouth template 10 is high temperature polyamide melt formings, form the place of material strip, high temperature polyamide melt out contacts with air from extruder.As shown in Figure 3, gas skirt 11 is located on front side of mouth template 10, gas skirt 11 comprises telescoping shoring column, U-shaped cover 31 and baffle plate 32, U-shaped cover 31 is fixed on telescoping shoring column, gas skirt can be packed up when power-on operation by telescoping shoring column, handled easily, in normal productive process, gas skirt puts down provides the inert gas environment lower than atmospheric density.The front side of U-shaped cover 31 is provided with baffle plate 32, U-shaped cover 31, and baffle plate 32 and mouth template 10 form a cavity jointly, hold the inert gas lower than atmospheric density, surround the outer surface of nib 21 on mouth template 10, with air exclusion, the caulking groove 33 that can be embedded into feed channel 12 is left at the top of U-shaped cover 31.As shown in Figure 4, described admission line comprises main pipeline 40 and branch pipe(tube) 41, and one end of main pipeline 40 connects air induction hose, and the other end blocks, and one end of branch pipe(tube) 41 connects main pipeline 40, and the other end is located at the position of the 2cm above the nib 21 of mouth template 10.Branch pipe(tube) 41 and nib 21 one_to_one corresponding, branch pipe(tube) is the branch on 41 main pipelines 40, is imported by the inert gas lower than atmospheric density and is diverted to directly over before each nib 21.
Polyamide melt or modified polyamide melt from the nib 21 mouth template 10 out, form material strip 13.Pass into pressure in admission line 12 and be greater than 0.01MPa, be less than 0.05MPa, the inert gas that density ratio atmospheric density is low, as nitrogen etc.Be gathered in gas skirt 11 after indifferent gas cognition enters into branch pipe(tube) 41 by admission line 12, thus make in gas skirt 11, to be full of the inert gas lower than atmospheric density, drive oxygen away.Ensure that the local oxygen concentration that the mouth template 10 of high temperature contacts with material strip 13 is low as far as possible, thus prevent polyamide melt or modified polyamide melt to be attached on mouth template 10 around nib 21.Under in the high temperature and air of mouth template 10, oxygen acts on for a long time, be attached on out the oxidized variable color of polyamide melt on material strip 13 and mouth template 10 around nib 21, jaundice, even blackening, thus prevent when polyamide or modified polyamide product Injection moulded part, article surface produces the flaw of heterochromatic class, substantially increases the accepted product percentage of Injection moulded part.Wherein, " L " shape chute 20 on mouth template 10 can coordinate with the U-shaped cover 31 on gas skirt 11, forms a relatively airtight cavity, avoids the inert gas lower than atmospheric density above mouth template 10 and side leakage.Telescoping shoring column 30 on gas skirt 11 is used for the position of accurate fixed set gas hood 11, and telescoping shoring column 30 can stretch and conveniently shut down clean-up port template 10 and dismounting mouth template 10.Baffle plate 32 on gas skirt 11, forms relative confined space with U-shaped cover 31 and collects the inert gas lower than atmospheric density, and avoid inert gas very fast above U-shaped cover 31 and side leakage, the caulking groove 33 on U-shaped cover 31 is used for being embedded into feed channel 12.Admission line 12 is made up of main pipeline 40 and branch pipe(tube) 41, branch pipe(tube) 41 and nib 21 one_to_one corresponding, ensure that inert gas that ratio atmospheric density that main pipeline 40 enters is low to import on mouth template 10 around nib 21 by branch pipe(tube) 41.Thus reduce nib 21 ambient oxygen concentration, being attached on out polyamide melt on material strip 13 and mouth template 10 around nib 21 would not oxidized variable color, turns to be yellow, blackening.
Claims (5)
1. one kind is prevented the device producing carbide in granulation process in mouth mould position, it is characterized in that, comprise mouth template (10) and admission line (12), described mouth template (10) has nib (21), and the outlet of admission line (12) is positioned at the position of gas skirt (11) nib (21) top.
2. the device of carbide in prevention granulation process as claimed in claim 1, is produced in mouth mould position, it is characterized in that, described gas skirt (11) is located at mouth template (10) front side and is formed a cavity with mouth template (10).
3. the device of carbide in prevention granulation process as claimed in claim 2, is produced in mouth mould position, it is characterized in that, described gas skirt (11) comprises telescoping shoring column, U-shaped cover (31) and baffle plate (32), U-shaped cover (31) is fixed on telescoping shoring column, the front side of U-shaped cover (31) is provided with baffle plate (32), and the caulking groove (33) that can be embedded into feed channel (12) is left at the top of U-shaped cover (31).
4. the device of carbide in prevention granulation process as claimed in claim 2, is produced in mouth mould position, it is characterized in that, top and the side of described mouth template (10) have " L " shape chute (20), and gas skirt (11) can coordinate with " L " shape chute (20).
5. the device of carbide in prevention granulation process as claimed in claim 1, is produced in mouth mould position, it is characterized in that, described admission line comprises main pipeline (40) and branch pipe(tube) (41), one end of main pipeline (40) connects air induction hose, the other end blocks, branch pipe(tube) (41) connects main pipeline (40), and the outlet of branch pipe(tube) (41) is located at the position of the 1cm ~ 3cm of nib (21) top of mouth template (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310727897.3A CN103707483B (en) | 2013-12-25 | 2013-12-25 | A kind of device prevented at mouth mould position generation carbide in granulation process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310727897.3A CN103707483B (en) | 2013-12-25 | 2013-12-25 | A kind of device prevented at mouth mould position generation carbide in granulation process |
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| Publication Number | Publication Date |
|---|---|
| CN103707483A CN103707483A (en) | 2014-04-09 |
| CN103707483B true CN103707483B (en) | 2016-04-27 |
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| CN201310727897.3A Active CN103707483B (en) | 2013-12-25 | 2013-12-25 | A kind of device prevented at mouth mould position generation carbide in granulation process |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1265351A (en) * | 1999-02-16 | 2000-09-06 | 普拉塞尔技术有限公司 | Method and system for providing inert gas for polymer film producing machine |
| JP2003112317A (en) * | 2001-10-05 | 2003-04-15 | Kazuo Shimizu | Molding plastic pellet manufacturing apparatus |
| CN101909838A (en) * | 2008-01-15 | 2010-12-08 | 矢崎总业株式会社 | Method and apparatus for forming strands |
-
2013
- 2013-12-25 CN CN201310727897.3A patent/CN103707483B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1265351A (en) * | 1999-02-16 | 2000-09-06 | 普拉塞尔技术有限公司 | Method and system for providing inert gas for polymer film producing machine |
| JP2003112317A (en) * | 2001-10-05 | 2003-04-15 | Kazuo Shimizu | Molding plastic pellet manufacturing apparatus |
| CN101909838A (en) * | 2008-01-15 | 2010-12-08 | 矢崎总业株式会社 | Method and apparatus for forming strands |
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| CN103707483A (en) | 2014-04-09 |
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