CN101352911B - Method for preparing chemical industry pipeline - Google Patents
Method for preparing chemical industry pipeline Download PDFInfo
- Publication number
- CN101352911B CN101352911B CN 200810223397 CN200810223397A CN101352911B CN 101352911 B CN101352911 B CN 101352911B CN 200810223397 CN200810223397 CN 200810223397 CN 200810223397 A CN200810223397 A CN 200810223397A CN 101352911 B CN101352911 B CN 101352911B
- Authority
- CN
- China
- Prior art keywords
- pipeline
- preparation
- dicyclopentadiene
- core
- mould
- 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.)
- Expired - Fee Related
Links
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a preparation method of a chemical pipeline; the preparation method includes the following steps: a. a component A and a component B of dicyclopentadiene are blended and injected into the die cavity of a die by a reaction injection molding machine for reaction; b. after the pipeline is formed, and a core stripping device is used for drawing a pipeline mold core out of the die cavity. In the step a, before the components of the dicyclopentadiene are injected into the die cavity of the die, the whole die carrier which is formed by assembling the die and the pipeline moldcore is lifted and tilted by 5-90 degrees; the speed of injecting the blended dicyclopentadiene into the die is 0.5-5kg/s. In the step b, before demoulding displacement reaches 10-20% of the length of the pipeline mold core, the demoulding force of the core stripping device is kept to be 40-100 tons, then the demoulding force is changed and the demoulding force of the core stripping device is maintained to be 15-30 tons. The length-diameter ratio of the produced pipeline is 8-57. By adopting DCPD as raw material, the method of the invention can reduce the material cost of the pipeline and canproduce the DCPD chemical pipeline with high performance.
Description
Technical field
The present invention relates to a kind of preparation method of pipeline, particularly relate to a kind of preparation method of chemical pipeline.
Background technology
DCPD, the formal name used at school dicyclopentadiene is the product that obtains after a kind of oil vapour cracking.Under highly purified situation, DCPD can carry out polymerization by the double decomposition chemical reaction, produces the cross-linked three D polymer architecture.
Because DCPD (dicyclopentadiene) has superior decay resistance, and superior stiffness and impact strength, the Applicable temperature scope is wide,-40 ℃ to 110 ℃ all can, good heat resistance has splendid electrical insulating property, compare with other materials and to be easy to processing, and cost is lower with respect to noble alloy, has reduced the manufacturing cost of pipeline widely, thereby can be used as the raw material of producing pipeline.
Original pipeline manufacture method all be usually adopt extrude, methods such as rotational moulding, winding, and DCPD can't adopt the conventional pipelines manufacture method to process owing to character of himself such as reason such as viscosity is low.Use reaction and injection molding process also can't prepare the elongated pipeline at present both at home and abroad, therefore need the preparation method of a kind of DCPD elongated pipeline of exploitation badly.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of preparation method of chemical pipeline, and can adopt DCPD is raw material, makes DCPD elongated pipeline, can reduce the material cost of pipeline, obtains the chemical pipeline of excellent performance.
For solving the problems of the technologies described above, the invention provides a kind of preparation method of chemical pipeline, it comprises the steps:
A mixes dicyclopentadiene two component A and B, and the die cavity with reaction injection molding machine injection mould reacts;
B extracts the pipeline core out with the depoling device after treating the pipeline typing from die cavity.
The preparation method of above-mentioned chemical pipeline, wherein, among the described step a, before the dicyclopentadiene component was injected the die cavity of mould, the whole mould bases that mould and pipeline core are combined into rose, and 5～90 degree tilt.The purpose that rises frame is in order to make the materials flow of DCPD material after the entering die cavity regular distribution of trying one's best, and avoids producing bubble.Because the DCPD liquid viscosity is lower, if straight injection then can in die cavity, form random flow, in injection DCPD process, can produce a small amount of bubble, and we rose whole form frame system come before with reaction injection molding injector injection DCPD, when injection DCPD liquid, DCPD will flow to lower direction along die cavity like this, thereby reduce random flowing and the generation of bubble, and at the residual bubble at higher direction place, available air exhauster is handled residual bubble.
The preparation method of above-mentioned chemical pipeline, wherein, among the described step b, before demoulding displacement reached pipeline core length 10～20%, keeping the knockout press of depoling device was 40～100 tons; Change knockout press afterwards, keeping the knockout press of depoling device is 15～30 tons.
The preparation method of above-mentioned chemical pipeline, wherein, the weight ratio of described dicyclopentadiene two component A and B is 1: 1, the two component A that participate in the dicyclopentadiene of reaction are dicyclopentadiene and major catalyst, component B is dicyclopentadiene and co-catalyst, for the model of buying from Japanese RIM Kabushiki Kaisha TEC is the product of Pentam2000.
The preparation method of above-mentioned chemical pipeline, wherein, among the described step a, the mold cavity temperature is 60 ℃～90 ℃, and the temperature of core is 75 ℃～100 ℃, the suitable temperature of the reaction of dicyclopentadiene is 60～90 ℃, because reaction can make the pipeline goods reach 200 ℃ for exothermic reaction, the heat that reaction produces, so need regulate the temperature of mould with cooling device, the mold cavity temperature is controlled at 60 ℃～90 ℃, and the core temperature is controlled at 75 ℃～100 ℃.
The preparation method of above-mentioned chemical pipeline, wherein, among the described step a, the speed that mixed dicyclopentadiene injects mould is 0.5～5kg/s.
The preparation method of above-mentioned chemical pipeline, wherein, among the described step b, pipeline goods shaping time is 2～8 minutes.
The preparation method of above-mentioned chemical pipeline, wherein, the described draw ratio that makes pipeline is 8～57.
The preparation method of above-mentioned chemical pipeline, wherein, the described internal diameter that makes pipeline is 100～500mm.
The preparation method of above-mentioned chemical pipeline, wherein, the described length that makes pipeline is 1～8 meter, wall thickness is 5～18mm.
The preparation method of chemical pipeline of the present invention, the processing method that adopts reaction injection molding to combine with the pipeline releasing process, resulting product is that columniform long tube and profile are complicated, endoporus is columniform long tube goods for being responsible for, the process one-shot forming, shorten work flow greatly, improved process velocity.Usually, because pipeline makes more greatly that to the coating power of core the frictional force of core and goods is bigger, and the general wall thickness of pipeline is all very little, thereby forced stripper mechanism causes damage to goods easily, and the preparation method of chemical pipeline of the present invention has overcome the difficulty of DCPD elongated pipeline demoulding difficulty, has realized adopting reaction injection molding to make the new method of elongated pipe fitting.It is raw material that the present invention adopts DCPD, material cost is significantly less than noble alloy, significantly reduced the cost of raw material of pipeline, and the DCPD pipeline corrosion resistance that makes is strong, have superior stiffness and impact strength, the Applicable temperature scope is wide, good heat resistance, having splendid electrical insulating property, is a kind of chemical pipeline of of many uses and excellent quality.
The specific embodiment
Describe the present invention in detail below in conjunction with embodiment.
Embodiment 1
(1) at first the core of pipeline is put into the pipeline die cavity of unlatching with the depoling device, use the folding mould device closed mould cavity;
(2) the whole mould bases that then mould and pipeline core is combined into rises, and is 5 ° of angles with level;
(3) then start injector, the bi-component dicyclopentadiene that with the model of buying from Japanese RIM Kabushiki Kaisha TEC in the storage tank is Pentam2000 is transported to the high-pressure injection blender by the weight ratio of 1:1, by this blender with A, the B component mixes, be expelled in the die cavity of mould with reaction injection molding machine then, injection rate is 0.5kg/s;
(4) temperature of control mould when mould injects raw material, raw material reacts in mould, and exothermic heat of reaction can make mold temperature raise, and adopts cooling device that the mold cavity temperature is controlled at 60 ℃～65 ℃, and the temperature of core is controlled at about 75 ℃～80 ℃;
(5) about about 2 minutes, after treating the typing of pipeline goods, with the depoling device core is extracted out from die cavity, the demoulding power of depoling device is 40 tons during beginning, keep this demoulding power, treat that the demoulding displacement is 10% o'clock of pipeline core length, change knockout press, keeping demoulding power is 15 tons, and the pipeline core is extracted out from die cavity;
(6) open die cavity, take out goods, gained pipeline goods carry out back processing processing as required or directly use.
The pipeline product weight that makes is 18.28kg, and length is 8 meters, and internal diameter is 140mm, and draw ratio is 57, and wall thickness is 5mm.
The DCPD pipeline compression resistance that makes is 10kg.
Embodiment 2
(1) at first the core of pipeline is put into the pipeline die cavity of unlatching with the depoling device, use the folding mould device closed mould cavity;
(2) the whole mould bases that then mould and pipeline core is combined into rises, and is 25 ° of angles with level;
(3) then start injector, the bi-component dicyclopentadiene that with the model of buying from Japanese RIM Kabushiki Kaisha TEC in the storage tank is Pentam2000 is transported to the high-pressure injection blender by the weight ratio of 1:1, by this blender with A, the B component mixes, be expelled in the die cavity of mould with reaction injection molding machine then, injection rate is 2.9kg/s;
(4) temperature of control mould when mould injects raw material, raw material reacts in mould, and exothermic heat of reaction can make mold temperature raise, and adopts cooling device that the mold cavity temperature is controlled at 70 ℃～75 ℃, and the temperature of core is controlled at about 85 ℃～90 ℃;
(5) about about 3 minutes, after treating the typing of pipeline goods, with the depoling device core is extracted out from die cavity, the demoulding power of depoling device is 50 tons during beginning, keep this demoulding power, treat that the demoulding displacement is 15% o'clock of pipeline core length, change knockout press, keeping demoulding power is 20 tons, and the pipeline core is extracted out from die cavity;
(6) open die cavity, take out goods, gained pipeline goods carry out back processing processing as required or directly use.
The pipeline product weight that makes is 48.98kg, and length is 4 meters, and internal diameter is 500mm, and draw ratio is 8, and wall thickness is 7.5mm.
The DCPD pipeline compression resistance that makes is 16kg.
Embodiment 3
(1) at first the core of pipeline is put into the pipeline die cavity of unlatching with the depoling device, use the folding mould device closed mould cavity;
(2) the whole mould bases that then mould and pipeline core is combined into rises, and is 60 ° of angles with level;
(3) then start injector, the bi-component dicyclopentadiene that with the model of buying from Japanese RIM Kabushiki Kaisha TEC in the storage tank is Pentam2000 is transported to the high-pressure injection blender by the weight ratio of 1:1, by this blender with A, the B component mixes, be expelled in the die cavity of mould with reaction injection molding machine then, injection rate is 3.8kg/s;
(4) temperature of control mould when mould injects raw material, raw material reacts in mould, and exothermic heat of reaction can make mold temperature raise, and the die cavity temperature is controlled at 75 ℃～80 ℃, and the temperature of core is controlled at about 90 ℃～95 ℃;
(5) about about 5 minutes, after treating the typing of pipeline goods, with the depoling device core is extracted out from die cavity, the demoulding power of depoling device is 80 tons during beginning, keep this demoulding power, treat that the demoulding displacement is 20% o'clock of pipeline core length, change knockout press, keeping demoulding power is 25 tons, and the pipeline core is extracted out from die cavity;
(6) open die cavity, take out goods, gained pipeline goods carry out back processing processing as required or directly use.
The pipeline product weight that makes is 3.26kg, and length is 1 meter, and internal diameter is 100mm, and draw ratio is 10, and wall thickness is 10mm.
The DCPD pipeline compression resistance that makes is 10kg.
Embodiment 4
(1) at first the core of pipeline is put into the pipeline die cavity of unlatching with the depoling device, use the folding mould device closed mould cavity;
(2) the whole mould bases that then mould and pipeline core is combined into rises, and is 90 ° of angles with level;
(3) then start injector, the bi-component dicyclopentadiene that with the model of buying from Japanese RIM Kabushiki Kaisha TEC in the storage tank is Pentam2000 is transported to the high-pressure injection blender by the weight ratio of 1:1, by this blender with A, the B component mixes, be expelled in the die cavity of mould with reaction injection molding machine then, injection rate is 5kg/s;
(4) temperature of control mould when mould injects raw material, raw material reacts in mould, and exothermic heat of reaction can make mold temperature raise, and the die cavity temperature is controlled at 85 ℃～90 ℃, and the temperature of core is controlled at about 95 ℃～100 ℃;
(5) about about 8 minutes, after treating the typing of pipeline goods, with the depoling device core is extracted out from die cavity, the demoulding power of depoling device is 100 tons during beginning, keep this demoulding power, treat that the demoulding displacement is 10% o'clock of pipeline core length, change knockout press, keeping demoulding power is 30 tons, and the pipeline core is extracted out from die cavity;
(6) open die cavity, take out goods, gained pipeline goods carry out back processing processing as required or directly use.
The pipeline product weight that makes is 125kg, and length is 8 meters, and internal diameter is 266mm, and draw ratio is 30, and wall thickness is 18mm.
The DCPD pipeline compression resistance that makes is 15kg.
The performance indications of the pipeline that embodiment 1～4 makes see Table 1.
Table 1
| Performance indications | Determination method | Numerical value |
| Proportion | JIS?K7112 | 1.04 |
| Bending strength (kgf/cm 2、23℃) | JIS?K7203 | 780 |
| Elastic modelling quantity (kgf/cm 2、23℃) | JIS?K7203 | 19500 |
| Case hardness | JIS?K7202 | R-118 |
| Impact strength (kgf/cm 2、23℃) | JIS?K7110 | 29 |
| Heat distortion temperature (℃) | JIS?K7207 | 110 |
| Water absorption rate (%, 23 ℃ * 24H) | JIS?K7209 | 0.12 |
| Hot strength (kgf/cm 2、23℃) | JIS?K7113 | 500 |
| Resistance to acids and bases (10%HCl, 40%NaOH) | JIS?K7114 | Weight there is not variation substantially |
| Electrical insulating property (23 ℃) | ? | 2.5×10 15Ω·cm |
Preparation method of the present invention can be used in and makes elongated DCPD chemical pipeline, can certainly be used to make short type DCPD chemical pipeline.
Claims (7)
1. the preparation method of a chemical pipeline, it comprises the steps:
A mixes dicyclopentadiene two component A and B, and the die cavity with reaction injection molding machine injection mould reacts;
B extracts the pipeline core out with the depoling device after treating the pipeline typing from die cavity;
Among the described step a, before the dicyclopentadiene component was injected the die cavity of mould, the whole mould bases that mould and pipeline core are combined into rose, and 5～90 degree tilt;
Among the described step b, before demoulding displacement reached pipeline core length 10～20%, keeping the knockout press of depoling device was 40～100 tons; Change knockout press afterwards, keeping the knockout press of depoling device is 15～30 tons;
The weight ratio of described dicyclopentadiene two component A and B is 1: 1, and component A is dicyclopentadiene and major catalyst, and component B is dicyclopentadiene and co-catalyst.
2. preparation method as claimed in claim 1, wherein, among the described step a, the mold cavity temperature is 60 ℃～90 ℃, the temperature of core is 75 ℃～100 ℃.
3. preparation method as claimed in claim 2, wherein, among the described step a, the speed that mixed dicyclopentadiene injects mould is 0.5～5kg/s.
4. preparation method as claimed in claim 3, wherein, among the described step b, pipeline goods shaping time is 2～8 minutes.
5. preparation method as claimed in claim 4, wherein, the described draw ratio that makes pipeline is 8～57.
6. preparation method as claimed in claim 5, wherein, the described internal diameter that makes pipeline is 100～500mm.
7. preparation method as claimed in claim 6, wherein, the described length that makes pipeline is 1～8 meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810223397 CN101352911B (en) | 2008-09-27 | 2008-09-27 | Method for preparing chemical industry pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810223397 CN101352911B (en) | 2008-09-27 | 2008-09-27 | Method for preparing chemical industry pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101352911A CN101352911A (en) | 2009-01-28 |
| CN101352911B true CN101352911B (en) | 2011-04-27 |
Family
ID=40306050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810223397 Expired - Fee Related CN101352911B (en) | 2008-09-27 | 2008-09-27 | Method for preparing chemical industry pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101352911B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110421777A (en) * | 2019-08-06 | 2019-11-08 | 合肥东胜新能源汽车股份有限公司 | A kind of PDCPT bumper face-piece processing technology |
| CN111204006A (en) * | 2020-01-16 | 2020-05-29 | 大成普道新材料技术有限公司 | Production method and application of hollow polydicyclopentadiene product |
| CN111361173B (en) * | 2020-04-29 | 2021-11-30 | 安吉申力机械有限公司 | Carbon fiber telescopic pipe die |
-
2008
- 2008-09-27 CN CN 200810223397 patent/CN101352911B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101352911A (en) | 2009-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100411843C (en) | Multipurpose polymer forming machine | |
| JP4919262B2 (en) | Storage container, resin molding method and plating film forming method | |
| CN102746583B (en) | A kind of modified polypropylene material and preparation method thereof and application | |
| CN110396286B (en) | Low-price excellent 3D printing consumable and preparation method thereof | |
| CN101712789B (en) | Fiber reinforcement injection molding product and injection molding method thereof | |
| CN101352911B (en) | Method for preparing chemical industry pipeline | |
| CN104761794B (en) | A kind of gutta-percha shape memory macromolecule composite material and preparation method thereof | |
| CN109501107A (en) | A kind of low-density, polymer foams of high foamability and preparation method thereof | |
| JP5658186B2 (en) | Method for producing hollow injection molded body | |
| CN104529902B (en) | Continuous pipe type gas phase catalytic reaction prepares the method for imidazoles | |
| CN108099090A (en) | A kind of utilize recycles the polyacrylic injection molding process of polypropylene production | |
| CN101559644B (en) | Manufacturing method for high strength polyphenylene sulfide tube | |
| EP3102622B1 (en) | Fast curing high glass transition temperature epoxy resin system | |
| CN107722551A (en) | A kind of toughening type pentaerythrite acrolein resin and preparation method thereof | |
| TW201005027A (en) | Polymer composition comprising a phenolic resin | |
| CN102153744A (en) | Preparation method of halloysite nanotube reinforced flame-retardant anionic polymerization nylon | |
| CN104974485A (en) | APET composite sheet and preparation method thereof | |
| JP2017508045A (en) | Epoxy resin | |
| EP3218421B1 (en) | Fast curing high glass transition temperature epoxy resin system | |
| CN114805902A (en) | Carbonic acid alkanolamine salt foaming agent composition for polyurethane rigid foam | |
| CN106397725A (en) | Heat preservation tube material prepared by recycling waste hard polyurethane foaming plastic, heat preservation tube and manufacturing method | |
| CN105835293B (en) | A kind of laminated mould and process for microporous foam injection | |
| CN102977250A (en) | Modified polytetrafluoroethylene, preparation method of modified polytetrafluoroethylene and application of modified polytetrafluoroethylene to high frequency connector | |
| CN108481654B (en) | Composite material injection molding process | |
| CN101537685A (en) | Screw cap and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20170927 |