CN101537685A - Screw cap and preparation method thereof - Google Patents
Screw cap and preparation method thereof Download PDFInfo
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- CN101537685A CN101537685A CN200910082577A CN200910082577A CN101537685A CN 101537685 A CN101537685 A CN 101537685A CN 200910082577 A CN200910082577 A CN 200910082577A CN 200910082577 A CN200910082577 A CN 200910082577A CN 101537685 A CN101537685 A CN 101537685A
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- dicyclopentadiene
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a screw cap and a preparation method thereof. The preparation method comprises the following steps: a. component A and component B are mixed together and then injected into a die cavity of a mould by a reaction injection molding machine to have polymerization reaction; b. after the screw cap is shaped, a mold core of the screw cap is extracted from the die cavity by a depoling device; wherein, the component A comprises dicyclopentadiene and main catalyst, the component B comprises dicyclopentadiene and catalyst accelerator, and the weight ratio between the component A and the component B is 1:1. In the component A, the weight ratio between the dicyclopentadiene and the main catalyst is 1000:1-1000:1.5; in the component B, the weight ration between the dicyclopentadiene and the catalyst accelerator is 1000:0.6-1000:0.8. The screw cap manufactured by the invention not only can reach the design requirement of the traditional screw cap, but also has the advantages of lower cost and high corrosion resistance.
Description
Technical field
The invention belongs to the engineering part field, particularly relate to a kind of nut and preparation method thereof.
Background technology
The processing method of existing nut has machining or metal casting moulding, generally need carry out secondary operations, the energy consumption height, and pollution is heavy, and the waste of material phenomenon is serious, and production efficiency is lower.In some special application, as chemical field, require nut to have better heat-resisting, corrosion resistance, and electrical insulating property preferably, now used nut adopts noble metal such as titanium, nickel, stainless steel or noble alloy material to make, and cost is higher.In electrolysis installation, the electric conductivity of metal nut product can cause certain hidden danger to safety in production.Work under the soda acid salt environment for a long time, metallic article has corrosion in various degree, causes the dismounting difficulty, even leaks.
Summary of the invention
The purpose of this invention is to provide a kind of lower-cost again nut of designing requirement that can reach conventional screw cap, its alternative traditional nut is to overcome the cost height, and the deficiency of processing technology complexity can solve the long problem of equipment life cycle simultaneously.
For achieving the above object, the present invention adopts following design:
A kind of preparation method of nut comprises the steps:
A, component A and component B are mixed, inject the die cavity of mould, polymerization reaction take place with reaction injection molding machine;
B, treat nut typing after, with the depoling device nut core is extracted out from die cavity;
Wherein component A is dicyclopentadiene and major catalyst, and component B is dicyclopentadiene and co-catalyst, and the weight ratio of component A and component B is 1: 1.The weight ratio of dicyclopentadiene and major catalyst is 1000: 1～1000: 1.5 among the component A; The weight ratio of dicyclopentadiene and co-catalyst is 1000: 0.6～1000: 0.8 among the component B.
Further, before mixed component was injected the die cavity of mould, the whole mould bases that mould and core are combined into rose, and 45 degree tilt.
Further, in described step a, the mold cavity temperature is 60 ℃～65 ℃, and the temperature of core is 75 ℃～80 ℃.The speed that mixed component injects mould is 1.5～3.3kg/s.In described step b, nut goods shaping time is 2～8 minutes.
The invention also discloses the nut that adopts method for preparing.
The present invention has following advantage:
1. rational in infrastructure, easy to process.The present invention adopts two component RIM reaction injection molding processing technologys, and work flow has been shortened in the one-shot forming of RIM method greatly, has improved process velocity, has improved production efficiency, and the interchangeability and the dimensional accuracy of product all are guaranteed.The physical and mechanical properties of material itself can satisfy the requirement of privileged site securing member, and the processing mode of DCPD material is highly suitable for large batch of standard component making.
2, the nut of manufacturing of the present invention has identical principle and effect with former nut, and all installation dimensions can be exchanged fully with former nut, and the nut of this manufactured can be progressively by the original nut under the alternative particular service requirement of methods such as device fabrication, maintain and replace.
3, having solved original nut time has grown the drawback that causes corrosion easily.
4, cost is lower.The material cost of dicyclopentadiene (DCPD) is significantly less than the metal (as titanium, nickel, stainless steel etc.) in the special dimension, and the material cost of nut is significantly lowered, and the market competitiveness significantly strengthens.
5, long service life.Traditional nut was generally 5 years with unskilled labor engineering plastics or general macromolecular material or metal manufacturing service life, promptly by crevice corrosion, needed place under repair again, and nut service life of using that this material makes is greater than nut in the past service life.Generally can reach 6-8.
Description of drawings
Fig. 1: the front view of the nut of the present invention's preparation;
Fig. 2: the vertical view of nut shown in Figure 1;
Fig. 3: the front view of the another kind of nut of the present invention's preparation;
Fig. 4: the vertical view of nut shown in Figure 3;
The specific embodiment
Shown in Fig. 1-4, this nut is to adopt dicyclopentadiene (DCPD), makes by the reaction injection molding method.Specifically comprise the steps:
A mixes dicyclopentadiene two component A and B, with the die cavity of reaction injection molding machine injection mould, polymerization reaction take place;
B extracts the nut core out with the depoling device after treating the nut typing from die cavity.
In above-mentioned nut preparation method's step a, before the dicyclopentadiene component was injected the die cavity of mould, the whole mould bases that mould and core are combined into rose, and 45 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 before with reaction injection molding injector injection DCPD, whole form frame system is risen, 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.
Among the preparation method of above-mentioned nut, the weight ratio of described dicyclopentadiene two component A and B is 1: 1, the component A that participates in polymerisation is 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 weight ratio of dicyclopentadiene and major catalyst is 1000: 1～1000: 1.5 among the component A; The weight ratio of dicyclopentadiene and co-catalyst is 1000: 0.6～1000: 0.8 among the component B.
In above-mentioned nut preparation method's described step a, the mold cavity temperature is 60 ℃～65 ℃, the temperature of core is 75 ℃～80 ℃, the temperature that the polymerisation of dicyclopentadiene is suitable is 60～80 ℃, because polymerisation is exothermic reaction, the heat that polymerization produces can make the pipeline goods reach 200 ℃, so the temperature that need regulate mould with cooling device, mold temperature is controlled at 60～80 ℃, and wherein the die cavity temperature is 60 ℃～65 ℃, and the temperature of core is 75 ℃～80 ℃.
In the preparation method's of above-mentioned nut described step a, the speed that mixed dicyclopentadiene injects mould is 1.5～3.3kg/s.
Among the described step b, nut goods shaping time is 2～8 minutes.
The described size range (thread diameter) that makes nut: metric system: M20-M64; Applied code: GB/T6170-2000.
The preparation method of nut of the present invention adopts the reaction injection molding processing method, and work flow has been shortened in the process one-shot forming greatly, has improved process velocity.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 extraordinary nut, and the DCPD nut 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 nut of and excellent quality of many uses at chemical field.
The performance indications of nut see the following form:
Performance indications determination method numerical value
Proportion JIS K7112 1.04
Bending strength (kgf/cm2,23 ℃) JIS K7203 780
Elastic modelling quantity (kgf/cm2,23 ℃) JIS K7203 19500
Case hardness JIS K7202 R-118
Impact strength (kgf/cm2,23 ℃) JIS K7110 29
Heat distortion temperature (℃) JIS K7207 110
Water absorption rate (the JIS K7209 0.12 of %, 23 ℃ * 24H)
Hot strength (kgf/cm2,23 ℃) 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 15 Ω cm.
Claims (8)
1, a kind of preparation method of nut comprises the steps:
A, component A and component B are mixed, inject the die cavity of mould, polymerization reaction take place with reaction injection molding machine;
B, treat nut typing after, with the depoling device nut core is extracted out from die cavity;
Wherein component A is dicyclopentadiene and major catalyst, and component B is dicyclopentadiene and co-catalyst, and the weight ratio of component A and component B is 1: 1.
2, preparation method according to claim 1 is characterized in that: before mixed component was injected the die cavity of mould, the whole mould bases that mould and core are combined into rose, and 45 degree tilt.
3, preparation method according to claim 2 is characterized in that: the weight ratio of dicyclopentadiene and major catalyst is 1000: 1～1000: 1.5 among the component A; The weight ratio of dicyclopentadiene and co-catalyst is 1000: 0.6～1000: 0.8 among the component B.
4, preparation method according to claim 3 is characterized in that: in described step a, the mold cavity temperature is 60 ℃～65 ℃, and the temperature of core is 75 ℃～80 ℃.
5, according to each described preparation method of claim 1-4, it is characterized in that: the speed that mixed component injects mould is 1.5～3.3kg/s.
6, according to each described preparation method of claim 1-5, it is characterized in that: in described step b, nut goods shaping time is 2～8 minutes.
7, a kind of nut adopts each described method preparation of claim 1-6.
8, a kind of nut adopts dicyclopentadiene, makes by the reaction injection molding method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910082577A CN101537685A (en) | 2009-04-28 | 2009-04-28 | Screw cap and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910082577A CN101537685A (en) | 2009-04-28 | 2009-04-28 | Screw cap and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101537685A true CN101537685A (en) | 2009-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910082577A Pending CN101537685A (en) | 2009-04-28 | 2009-04-28 | Screw cap and preparation method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN101537685A (en) |
Cited By (1)
| 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 |
-
2009
- 2009-04-28 CN CN200910082577A patent/CN101537685A/en active Pending
Cited By (1)
| 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 |
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Open date: 20090923 |