CN104999642B - Preparation technology for extra-large-caliber chlorinated polyvinyl chloride pipe - Google Patents
Preparation technology for extra-large-caliber chlorinated polyvinyl chloride pipe Download PDFInfo
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- CN104999642B CN104999642B CN201510325925.8A CN201510325925A CN104999642B CN 104999642 B CN104999642 B CN 104999642B CN 201510325925 A CN201510325925 A CN 201510325925A CN 104999642 B CN104999642 B CN 104999642B
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- Prior art keywords
- annular distance
- polyvinyl chloride
- water conservancy
- conservancy diversion
- mould body
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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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a preparation technology for an extra-large-caliber chlorinated polyvinyl chloride pipe. The preparation technology for the extra-large-caliber chlorinated polyvinyl chloride pipe comprises the following working procedures that chlorinated polyvinyl chloride particles are taken as a raw material, through high-temperature plasticization, extrusion injection molding, vacuum sizing, cooling and cutting, the extra-large-caliber chlorinated polyvinyl chloride pipe is prepared, the extrusion injection molding adopts a special purpose extrusion molding mold, the special purpose extrusion molding mold comprises a main mold body and a molding mold body fixedly arranged on the main mold body, and the temperature differences of the chlorinated polyvinyl chloride in positions of all sections in the main mold body and the molding mold body are not larger than three degree centigrade. The preparation technology for the extra-large-caliber chlorinated polyvinyl chloride pipe has the advantages that the technology can be suitable for machining chlorinated polyvinyl chloride pipes with extra-large calibers of above DN600.
Description
Technical field
The invention belongs to a kind of preparation field of plastic pipe, specifically refers to a kind of super-large diameter chlorinated polyvinyl chloride pipe
Preparation technology.
Background technology
PVC-C（Chlorinated polyvinyl chloride second is dilute）Model engineering plastic is a kind of big with high intensity, high temperature resistant, strong acid-base resistance etc. three
The new material of key property.Its preparation technology is with PVC-C chliorinated polyvinyl chloride raw materials：PVC-C is generated by the chlorination of PVC free radicals
, general chlorinity is 63%-69%, and its chlorination reaction process is as follows：Start：Cl2→2Cl；Increasing is spread out：RH+HCl→R+HCl；
R+Cl2→RCl+Cl；Terminate：R+Cl→RCl；Cl+Cl→Cl2；R+R→R2.（RH represents PVC, → represent heating）.
The dilute performance in order to ensure its high intensity, high temperature resistant, strong acid-base resistance of chlorinated polyvinyl chloride second, its chlorinity typically wants 63%
More than, causing that the dilute processing characteristics of chlorinated polyvinyl chloride second is poor, large-caliber product molding is more difficult, the national standard published for 2003,
Iso standard only compiles the bore to 225, and American Standard also only accomplishes 400.At present in the world maximum caliber only accomplishes 600.Both at home and abroad
It is more and more urgent to the demand of super-large diameter CPVC tubing on market.
The content of the invention
The invention aims to overcome the shortcoming and defect that prior art is present, and provide a kind of super-large diameter chlorination
The preparation technology of polyvinyl chloride pipe, can be suitably used for processing the super-large diameter chlorinated polyvinyl chloride pipe of more than DN600 by the technique.
For achieving the above object, the technical scheme is that and include following operation：It is with chliorinated polyvinyl chloride granule
Raw material, through high temperature plasticizing, extrusion molding, Vacuum shaping, cools down, is cut into, and described extrusion molding adopts special extrusion
Mould, the special extrusion molding mould includes main mould body and the molding die body being fixedly installed on main mould body, the molding
Be provided with die body for super-large diameter chlorinated polyvinyl chloride pipe and a diameter of more than 600mm extrusion moulding annular distance, it is described
One end of main mould body is provided with the inner in charging hole, main mould body relative to charging hole and is provided with and communicated with tapered water conservancy diversion annular distance, bores
The top of type water conservancy diversion annular distance is connected with the inner of charging hole, and the rear end in described main mould body relative to tapered water conservancy diversion annular distance connects
Logical to be provided with transition water conservancy diversion annular distance, the leading portion of the transition water conservancy diversion annular distance is connected and the two diameter with the back segment of tapered water conservancy diversion annular distance
Equal, the rear end of the transition water conservancy diversion annular distance is connected with the inner of extrusion moulding annular distance, the back segment of the transition water conservancy diversion annular distance according to
Material to the orient diameter that extrusion moulding annular distance flows gradually decreases setting, and described charging hole, tapered water conservancy diversion annular distance, transition are led
The central shaft of stream annular distance coincides with the central shaft of main mould body, and described main mould body phase is for tapered water conservancy diversion annular distance and transition water conservancy diversion
The center of annular distance is provided with the first thermal medium chamber, the thermal medium chamber include from the front end of main mould body backward extreme direction according to
Secondary connection and mutually with the small size cylindrical cavity of central shaft, middle volume barrel mast chamber and large volume cylindrical cavity, and the small size cylinder
The central shaft in chamber, the central shaft in middle volume barrel mast chamber and large volume cylindrical cavity and main mould body coincides, described shaping mould body phase
Second thermal medium cylindrical cavity is provided centrally with for extrusion moulding annular distance, the inner of the second thermal medium cylindrical cavity with it is big
The rear end of volume cylindrical cavity is connected, and the volume of the second thermal medium cylindrical cavity is more than the volume of large volume cylindrical cavity, described
The each fragment position temperature difference of the chliorinated polyvinyl chloride in main mould body and molding die body be not more than 3 degrees Celsius.
Further arrange be chliorinated polyvinyl chloride granule before high temperature plasticizing through high-speed mixer prebake, its drying
Temperature and time should be controlled within 80 ± 2 DEG C, 10 ± 0.1 minutes.
The present invention Innovation Mechanism and beneficial effect be：
The present inventor limits super-large diameter chlorinated polyvinyl chloride second to the discovery of super-large diameter chlorinated polyvinyl chloride pipe development stage
The central factor of alkene pipe molding is：Because the dilute processing characteristic of chlorinated polyvinyl chloride second is poor, and stability of material is not enough, is carrying out spy
During the molding of heavy caliber chlorinated polyvinyl chloride pipe, when flowing in the extrusion molding dies of chliorinated polyvinyl chloride, gradually cooling can drop
Temperature, and the temperature lowering curve is difficult to control to, so as to each section of temperature difference for causing extrusion molding dies can find large change, and it is fatal
It is that when the chliorinated polyvinyl chloride temperature difference everywhere in a mold is more than 3 DEG C, material will decompose.
The present invention carries out above-mentioned special design to special extrusion molding mould based on the discovery, and designs and be mutually matched
Pod apertures and heat medium cavity, so as to using the temperature control of heating agent, can be with ideal and stably realize each section of mould
The temperature difference is less than 3 degrees Celsius, thus achieves the preparation of the super-large diameter chlorinated polyvinyl chloride pipe of more than DN600, very well
Meet.To the urgent needss of super-large diameter CPVC tubing on domestic and international market, extraordinary economic benefit is obtained
The present invention is described further with reference to specification drawings and specific embodiments.
Description of the drawings
Fig. 1 specific embodiment of the invention structural representations.
Specific embodiment
The present invention is specifically described below by embodiment, is served only for being further described the present invention, no
It is understood that for limiting the scope of the present invention, the technician in the field can be according to the content of foregoing invention to the present invention
Make some nonessential modifications and adaptations.
The specific embodiment of the invention as shown in Figure 1, includes following operation：With chliorinated polyvinyl chloride granule as original
Material, through high temperature plasticizing, extrusion injection mo(u)lding, Vacuum shaping, cools down, is cut into, and described extrusion injection mo(u)lding is using special
With extrusion molding mould, the special extrusion molding mould includes main mould body 1 and the molding die body being fixedly installed on main mould body
2, be provided with the molding die body for super-large diameter chlorinated polyvinyl chloride pipe and a diameter of more than 600mm extrusion moulding annular distance
21, one end of described main mould body 1 is provided with charging hole 11, and the interior the inner relative to charging hole of main mould body is provided with and communicated with tapered
Water conservancy diversion annular distance 12, the top of tapered water conservancy diversion annular distance 12 is connected with the inner of charging hole 11, relative to cone in described main mould body 1
The rear end of type water conservancy diversion annular distance 12 is provided with and communicated with transition water conservancy diversion annular distance 13, leading portion and the tapered guide ring of the transition water conservancy diversion annular distance 13
The back segment in hole 12 is connected and the two equal diameters, the rear end of the transition water conservancy diversion annular distance 13 and the inner phase of extrusion moulding annular distance 21
Connection, the back segment 131 of the transition water conservancy diversion annular distance 13 is gradually decreased according to material to the orient diameter that extrusion moulding annular distance 21 flows
Arrange, the central shaft phase of described charging hole 11, tapered water conservancy diversion annular distance 12, the central shaft of transition water conservancy diversion annular distance 13 and main mould body 1
Overlap, described main mould body 1 is provided with the first heating agent relative to the center of tapered water conservancy diversion annular distance 12 and transition water conservancy diversion annular distance 13
Dielectric cavity 14, the thermal medium chamber includes from the front end of main mould body that backward extreme direction is sequentially communicated and mutually with the little of central shaft
Volume cylindrical cavity 141, middle volume barrel mast chamber 142 and large volume cylindrical cavity 143, and the small size cylindrical cavity 141, middle volume barrel mast
The central shaft of chamber 142 and large volume cylindrical cavity 143 coincides with the central shaft of main mould body 1, and described molding die body 2 is relative to crowded
Molded annular distance 21 is provided centrally with the second thermal medium cylindrical cavity 22, the inner of the second thermal medium cylindrical cavity 22 with it is big
The rear end of volume cylindrical cavity 143 is connected, and the volume of the second thermal medium cylindrical cavity 22 is more than the volume of large volume cylindrical cavity,
The each fragment position temperature difference of the described chliorinated polyvinyl chloride in main mould body 1 and molding die body 2 is not more than 3 degrees Celsius.
The above-mentioned charging hole 11 of the present embodiment, tapered water conservancy diversion annular distance 12, transition water conservancy diversion annular distance 13, extrusion moulding annular distance 21 it is straight
The volume parameter of footpath and length and the first thermal medium chamber 14 and the second thermal medium cylindrical cavity 22 is according to main mould body 1 and molding
The material of die body, thermal conductivity and concrete heating agent used carry out specific aim setting, are being led with the chliorinated polyvinyl chloride for realizing described
Each fragment position temperature difference in die body 1 and molding die body 2 is not more than 3 degrees Celsius.Those skilled in the art can be in the above-mentioned of the application
Under the guidance of setting, specific parameter setting is done.
In addition, the present embodiment chliorinated polyvinyl chloride granule high temperature plasticizing before through baking oven prebake, its drying temperature
Should control within 80 ± 2 DEG C, 2 ± 0.1 hours with the time.
CPVC particulate materials used by the present embodiment have to comply with following physics, mechanical performance and chemical resistance requirements：
（1）To physics, mechanical property requirements after raw material CPVC molding
（2）Requirement to the chemical-resistance after raw material CPVC molding
Raw material（CPVC）Must reach and meet ISO/TR10358:" chemical resistance S level " or " resistance toization are selected in 1993 standards
Learn L levels " or " chemical resistance NS level ", the chemical resistance of chemical mediator that can use.
It is concrete to may be selected to adopt the CPVC chlorinated polyethylenees produced with the formula of Nuo Yu companies of the U.S. as raw material, make product
With high intensity, high temperature resistant, resistance to strong acid, highly basic characteristic.
Claims (2)
1. a kind of preparation technology of super-large diameter chlorinated polyvinyl chloride pipe, it is characterised in that：Include following operation：It is poly- with chlorination
Vinyl chloride granule is raw material, through high temperature plasticizing, extrusion molding, Vacuum shaping, cools down, is cut into, described extrusion molding
Using special extrusion molding mould, the special extrusion molding mould includes main mould body and the molding being fixedly installed on main mould body
Die body, be provided with the molding die body for super-large diameter chlorinated polyvinyl chloride pipe and a diameter of more than 600mm extrusion moulding
Annular distance, one end of described main mould body is provided with charging hole, and the interior the inner relative to charging hole of main mould body is provided with and communicated with tapered
Water conservancy diversion annular distance, the tapered top of water conservancy diversion annular distance is connected with the inner of charging hole, relative to tapered water conservancy diversion in described main mould body
The rear end of annular distance is provided with and communicated with transition water conservancy diversion annular distance, and the leading portion of the transition water conservancy diversion annular distance is connected with the back segment of tapered water conservancy diversion annular distance
Logical and the two equal diameters, the rear end of the transition water conservancy diversion annular distance is connected with the inner of extrusion moulding annular distance, the transition guide ring
The back segment in hole gradually decreases setting according to material to the orient diameter that extrusion moulding annular distance flows, and described charging hole, tapered leads
Stream annular distance, the central shaft of transition water conservancy diversion annular distance and the central shaft of main mould body coincide, and described main mould body phase is for tapered water conservancy diversion
The center of annular distance and transition water conservancy diversion annular distance is provided with the first thermal medium chamber, and the thermal medium chamber is included from before main mould body
Backward extreme direction is sequentially communicated and mutually with the small size cylindrical cavity of central shaft, middle volume barrel mast chamber and large volume cylindrical cavity at end,
And the central shaft of the small size cylindrical cavity, the central shaft in middle volume barrel mast chamber and large volume cylindrical cavity and main mould body coincides, institute
The shaping mould body phase stated is provided centrally with the second thermal medium cylindrical cavity for extrusion moulding annular distance, the second thermal medium circle
The inner in post chamber is connected with the rear end of large volume cylindrical cavity, and the volume of the second thermal medium cylindrical cavity is more than large volume cylinder
The volume in chamber, each fragment position temperature difference in each fragment position and molding die body of the chliorinated polyvinyl chloride in main mould body is no more than 3
Degree Celsius.
2. the preparation technology of a kind of super-large diameter chlorinated polyvinyl chloride pipe according to claim 1, it is characterised in that：Chlorination
Through high-speed mixer prebake before high temperature plasticizing, its drying temperature and time should control 80 ± 2 polyvinyl chloride particles
DEG C, within 10 ± 0.1 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510325925.8A CN104999642B (en) | 2015-06-12 | 2015-06-12 | Preparation technology for extra-large-caliber chlorinated polyvinyl chloride pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510325925.8A CN104999642B (en) | 2015-06-12 | 2015-06-12 | Preparation technology for extra-large-caliber chlorinated polyvinyl chloride pipe |
Publications (2)
| Publication Number | Publication Date |
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| CN104999642A CN104999642A (en) | 2015-10-28 |
| CN104999642B true CN104999642B (en) | 2017-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510325925.8A Active CN104999642B (en) | 2015-06-12 | 2015-06-12 | Preparation technology for extra-large-caliber chlorinated polyvinyl chloride pipe |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115431474A (en) * | 2022-11-07 | 2022-12-06 | 宁波兴利汽车模具有限公司 | Extrusion forming die and processing technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003112358A (en) * | 2001-10-05 | 2003-04-15 | Sekisui Chem Co Ltd | Method for manufacturing vinyl chloride resin liner material for pipe line |
| KR20090062033A (en) * | 2007-12-12 | 2009-06-17 | 현대모비스 주식회사 | Injection molding device having variable nozzle |
| CN201205753Y (en) * | 2008-03-31 | 2009-03-11 | 东莞市燿安塑胶机器有限公司 | Mould for large diameter plastic rubber pipe extruder |
| CN101344194A (en) * | 2008-08-18 | 2009-01-14 | 江苏常盛管业有限公司 | Production technology of modified polyvinyl chloride pipes |
| CN203472116U (en) * | 2013-08-15 | 2014-03-12 | 永高股份有限公司 | Reinforced polymer plasticizing device of CPVC (Chlorinated Polyvinyl Chloride) pipe extrusion die |
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Denomination of invention: A kind of preparation technology of extra-large diameter chlorinated polyvinyl chloride pipe Effective date of registration: 20220904 Granted publication date: 20170412 Pledgee: Agricultural Bank of China Limited by Share Ltd. Yueqing branch Pledgor: YOULI HOLDING GROUP Co.,Ltd. Registration number: Y2022330002069 |
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