CN1050091C - Method for manufacturing a composite pipe provided with a preform - Google Patents
Method for manufacturing a composite pipe provided with a preform Download PDFInfo
- Publication number
- CN1050091C CN1050091C CN95121722A CN95121722A CN1050091C CN 1050091 C CN1050091 C CN 1050091C CN 95121722 A CN95121722 A CN 95121722A CN 95121722 A CN95121722 A CN 95121722A CN 1050091 C CN1050091 C CN 1050091C
- Authority
- CN
- China
- Prior art keywords
- resin
- thermosetting resin
- formed articles
- heat shrinkable
- shrinkable sleeve
- 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
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 229920005989 resin Polymers 0.000 claims abstract description 83
- 239000011347 resin Substances 0.000 claims abstract description 83
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 10
- 230000008602 contraction Effects 0.000 claims description 6
- 238000007669 thermal treatment Methods 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 239000004753 textile Substances 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 2
- 238000009826 distribution Methods 0.000 abstract description 2
- 229920006257 Heat-shrinkable film Polymers 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
A method of manufacturing a composite tube provided with a preform, comprising the steps of: (1) sleeving a preform made of a braided material on a mandrel; (2) sleeving a heat-shrinkable sleeve made of a heat-shrinkable film or tape outside the preform, and forming a buffer chamber in a concentric ring gap between the preform and the sleeve; (3) pouring thermosetting resin into the buffer chamber through an inlet of the buffer chamber, and then sealing the inlet; (4) heating and shrinking the heat shrinkable sleeve; (5) heating and hardening the resin to form the composite pipe. Has the advantages of simplified process, no air holes in the product and uniform mechanical strength distribution.
Description
The present invention relates to be provided with the manufacture method of the composite pipe of pre-formed articles.
The process of the making composite pipe of traditional resin injection molded method is: A, will be enclosed within on the axle behind the pre-formed articles pre-soaked resin; B, go into mould; C, inject resin from mould one end again; D, add warm working; E, the demoulding; F, finished product.
Its major defect is: 1, when injecting resin, because of flow direction and the speed of resin in mould wayward, bag air in easily causing, this is because resin flows is a three dimensional constitution along the surface configuration of molded article carries out, and resin injects the speed faster or slower behind the mould therebetween, when fast part advances to the mould other end when refluxing again, with after extremely resin cross, and air order venting contained in the pre-formed articles consequently can't be formed the cavity, influence end product quality and performance.2, in order to make resin fully and equably inject pre-formed articles, available retarding method or pre-soaked resin often need expend the long time.3, need the external mold mould, increase manufacturing cost.4, lack the effect of pressure during forming and hardening.
In view of above-mentioned defective, inventor's improvement of concentrating on studies creates technical scheme of the present invention.
The object of the present invention is to provide a kind of follow-on manufacture method that is provided with the composite pipe of pre-formed articles, overcome the drawback of prior art, reach and simplify fabrication schedule, save manufacturing cost, eliminate pore in the product, improve the quality of products and purpose that mechanical strength is evenly distributed.
The object of the present invention is achieved like this: a kind of manufacture method that is provided with the composite pipe of pre-formed articles is characterized in that this method comprises the steps:
(1) pre-formed articles is set on the axle;
(2) heat shrinkable sleeve is set in outside this pre-formed articles, forms surge chamber in the gap between this pre-formed articles and heat shrinkable sleeve;
(3) inlet of this surge chamber charges thermosetting resin and enters in this surge chamber certainly, seals up inlet, makes this thermosetting resin carry out gravitational settling to form one " resin pool " in this surge chamber;
(4) this heat shrinkable sleeve of heat shrink by the upwards heating step by step of bottom of this heat shrinkable sleeve, to oppress the thermosetting resin in this resin pool, to center and upwards mobile, is infiltrated in this pre-formed articles equably, and removes bubble wherein;
(5) solidification temperature that continues to be heated to this thermosetting resin is solidified to solidify this thermosetting resin, to make the pre-formed articles that is impregnated with this thermosetting resin, takes out this sleeve to form the product of composite pipe.
Tighten the flow velocity of the upwards mobile thermosetting resin stream of first tight ring restriction in this top position, heat shrinkable sleeve district of heating; Thermal treatment zone lower position tighten second tight ring so that the caliber size of composite pipe within the specific limits; This thermosetting resin comprises epoxy resin; This heat shrinkable sleeve is to be made by the thermal contraction polyvinyl chloride; The volume of this surge chamber is Vb, and added thermosetting resin volume is Vr in this surge chamber, and is following relationship: Vb=nVr, wherein n＞1; The temperature that heats this heat shrinkable sleeve is between 75-90 ℃; The heating-up temperature of solidifying this this composite pipe of thermosetting resin moulding is between 120-180 ℃; When this heat shrinkable sleeve is heated, inwardly compresses this thermosetting resin and flow, it is mobile to tube hub with one heart that this resin flow is, and up flow to the top of this surge chamber; This pre-formed articles comprises the pre-formed articles of woven fibre material and textile material; Method that should (4) this heat shrinkable sleeve of heat shrink comprises from the sealed end that charges behind the thermosetting resin being heated to another openend one by one, resin in the compressing resin pool and the bubble in the pre-formed articles.
Following conjunction with figs. and preferred embodiment are described in detail.
Fig. 1 is system's sectional drawing of manufacturing composite pipe of the present invention.
Fig. 2 is the schematic diagram of thermal contraction in the manufacture process of the present invention and resin flows.
Fig. 3 is the vertical view of Fig. 2.
Fig. 4 is the skiagraph of composite pipe of the present invention.
Fig. 5 is the vertical section schematic diagram of the composite pipe of embodiments of the invention 2.
Consult Fig. 1-4, the method that the present invention is used for making composite pipe comprises the following steps:
(1) pre-formed articles 2 that will make by braided material or other textile materials, be set on the axle 1, as shown in Figure 1, this axle 1 can be produced by metal or nonmetallic materials, may be molded to any kind of hermetic type structure, the trend of the shape of pre-formed articles 2, structure, fiber can be selected for use arbitrarily, but axle of the present invention 1 still is advisable with circle with the cross section of pre-formed articles 2.
(2) heat shrinkable sleeve 3 is set on this pre-formed articles 2, to form a compound tube: it comprises this axle 1, pre-formed articles 2 and heat shrinkable sleeve 3, forms a surge chamber 5 between a clearance G in the middle of this pre-formed articles 2 and the heat shrinkable sleeve 3 and a base plate 4.This heat shrinkable sleeve 3 can be by polyvinyl chloride (PVC) film, band or sheet, or other materials that shrink because of heating are produced.Heat shrinkable sleeve 3 can be a single or multiple lift, and thickness is not limit.
(3) inlet 51 of thermosetting resin 6 from surge chamber 5 poured in this surge chamber 5, cover base plate 4 sealed entries 51 then, and make the thermosetting resin 6 horizontal sedimentations in this surge chamber 5, to form one " resin pool " P.This thermosetting resin 6 also can be selected from epoxy resin or other thermosetting resins.The consumption of used thermosetting resin 6 is among the present invention: when being benchmark with the weight (100%) of fibrous material in the pre-formed articles 2, thermosetting resin 6 content are then between 35-50 (weight) %.If when being benchmark according to the cumulative volume 100% of the made composite pipe product of the inventive method, the fibrous material volume of pre-formed articles 2 is then between 40-62 (volume) %.
In manufacture process of the present invention, the volume of this surge chamber 5 is made as Vb, and the volume of thermosetting resin 6 is made as Vr, then can form following relation:
Vb＝nVr；
Wherein, n, flows in surge chamber 5 to hold thermosetting resin 6 so that the space of enough volumes can be provided greater than 1.
(4) be arranged in the mobile thermal treatment zone " H " shown in Figure 2 with a firing equipment 8, heat, shrink this heat shrinkable sleeve 3, make the direction of its thermal contraction, heating can take to begin, from lower to upper by the bottom of heat shrinkable sleeve 3, rise gradually and heat, heating-up temperature is between 75-90 ℃.
In heating process, heat shrinkable sleeve 3 flows to center I because of the thermosetting resin liquid that oppressed among the resin pool P by thermal contraction, and upwards the direction of U flows shown in Fig. 2,3 equably resin seepage flow, is immersed in the fiber or internal organizational structure of pre-formed articles 2, with effective imbibition, dipping pre-formed articles 2, and force to attract the bubble in this thermosetting resin 6 and the pre-formed articles 2 and effectively get rid of bubble, improve the quality of product with the numerous holes in the minimizing product.
The path that makes resin flows because of the compressing of heat shrinkable sleeve 3 is to center I and U upwards, so resin flow
The path that makes resin flows because of the compressing of heat shrinkable sleeve 3 is to center I and U upwards, so resin flow is flowing of " regular path ", and can permeate, flood, be distributed in the pre-formed articles 2 equably, compare with the resin flow paths irregular, at random of conventional, well-known, the present invention is better than the method used always really.
In heating process of the present invention, the system pressure in the surge chamber 5 is a normal pressure, also promptly except heat shrinkable sleeve 3 because of pressure that thermal contraction presented increases, system does not add other equipment in addition and pressurizes, and can find out that at this present invention has economic, practical property yet.
Though the present invention is as mentioned above, under a system pressure, carry out the step of heat shrink, if necessary, this surge chamber 5 can seal in advance and vacuumize, and makes it more effectively remove any bubble in thermosetting resin 6 and the pre-formed articles 2.Certainly, carry out in the system forvacuum be not process of the present invention must limit.
Composite pipe of the present invention preferably adopts vertical stand-up state as shown in drawings, and the orientation of an angle or additive method is also passable but pipe tilts, and the present invention also can suitably modify application.
(5) continue heating, solidify under the solidification temperature of this thermosetting resin 6, for example: epoxy resin can solidify between 120-180 ℃.The pre-formed articles 2 that is impregnated with resin is solidified, slough heat shrinkable sleeve 3 then to form composite pipe of the present invention.
Behind resin solidification, the pre-formed articles 2 on this axle 1 evenly be impregnated with resin will be glued forming a firm composite pipe structure, thereby form the composite pipe of strengthening.
The above is the method that is used for making the composite pipe that contains the thin layer pre-formed articles.
Consult Fig. 5, when pre-formed articles 2 adopts multilayer 2a or thick-layer, can be enclosed within on this heat shrinkable sleeve 3 with first tight ring 7 (or title " current limiter ") in the top position of thermal treatment zone H, when heating, when interior pressurizing resin flows, can limit the flow velocity of its U that makes progress, infiltrate in the pre-formed articles 2 to promote the inside I of resin; And the sheathed second tight ring 7a below the H of the thermal treatment zone (or claim " shaping circle ") with control, keep the caliber of moulding composite pipe in a certain size scope.
The present invention is superior to the composite pipe of preimpregnation material commonly used, and is better than known resin injection molding method (PTM) and makes the composite pipe product, and it has following advantage:
1, when heat shrinkable sleeve 3 heating, make resin flow infiltrate in the pre-formed articles 2 and upwards mobile U to center I, and resin 6 can be evenly distributed in pre-formed articles 2 internal structures, to form the even composite pipe of firm matter, resin flow to upper reaches U then is attracted, takes away bubble, improves the quality of products to eliminate the pore in the product.
2, need not use complicated mould, can save manufacturing cost, simplify fabrication schedule.
3, pre-formed articles 2 does not need pre-soaked resin liquid, so the freezing and refrigeration facility need be set, reduces equipment investment cost, and molding process is oversimplified.
4, resin introduce in the surge chamber 5 and by the below drive stream and on, make resin sedimentation flatly in " resin pool " P, it can be infiltrated in the pre-formed articles 2 equably, so the distribution of thermosetting resin 6 is well-balanced, composite pipe structural strength after the curing is distributed also be evenly, and of fine quality.
The present invention is not limited to this example, can make appropriate change under spirit of the present invention and scope, and as when this pyrocondensation sleeve 3 of heat shrink, heater 8 can be shifted to the top by the below of heat shrinkable sleeve 3; Or sleeve 3 is shifted from top to bottom with respect to this heater.In addition, the pipe of other orientations charges resin and goes into the direction of this surge chamber 5 or the direction of heating, also change as required.This axle 1 can be separated with the pre-formed articles of the impregnating resin that has cured when making composite pipe, promptly detaches this axle; Maybe needn't detach axle, decide on product needed, the present invention is not limited.
Claims (10)
1, a kind of manufacture method that is provided with the composite pipe of pre-formed articles is characterized in that this method comprises the steps:
(1) pre-formed articles is set on the axle;
(2) heat shrinkable sleeve is set in outside this pre-formed articles, forms surge chamber in the gap between this pre-formed articles and heat shrinkable sleeve;
(3) inlet of this surge chamber charges thermosetting resin and enters in this surge chamber certainly, seals up inlet, makes this thermosetting resin carry out gravitational settling to form one " resin pool " in this surge chamber;
(4) this heat shrinkable sleeve of heat shrink by the upwards heating step by step of bottom of this heat shrinkable sleeve, to oppress the thermosetting resin in this resin pool, to center and upwards mobile, is infiltrated in this pre-formed articles equably, and removes bubble wherein;
(5) solidification temperature that continues to be heated to this thermosetting resin is solidified to solidify this thermosetting resin, to make the pre-formed articles that is impregnated with this thermosetting resin, takes out this sleeve to form the product of composite pipe.
2, manufacture method as claimed in claim 1 is characterized in that: the flow velocity of tightening the upwards mobile thermosetting resin stream of first tight ring restriction in this top position, heat shrinkable sleeve district of heating; Thermal treatment zone lower position tighten second tight ring so that the caliber size of composite pipe within the specific limits.
3, manufacture method as claimed in claim 1 is characterized in that: this thermosetting resin is an epoxy resin.
4, manufacture method as claimed in claim 1 is characterized in that: this heat shrinkable sleeve is to be made by the thermal contraction polyvinyl chloride.
5, manufacture method as claimed in claim 1 is characterized in that: the volume of this surge chamber is Vb, and added thermosetting resin volume is Vr in this surge chamber, and is following relationship: Vb=nVr, wherein n＞1.
6, manufacture method as claimed in claim 1 is characterized in that: the temperature that heats this heat shrinkable sleeve is between 75-90 ℃.
7, manufacture method as claimed in claim 1 is characterized in that: the heating-up temperature of solidifying this this composite pipe of thermosetting resin moulding is between 120-180 ℃.
8, manufacture method as claimed in claim 1 is characterized in that: when this heat shrinkable sleeve is heated, inwardly compresses this thermosetting resin and flow, it is mobile to tube hub with one heart that this resin flow is, and up flow to the top of this surge chamber.
9, manufacture method as claimed in claim 1 is characterized in that: this pre-formed articles comprises the pre-formed articles of woven fibre material and textile material.
10, manufacture method as claimed in claim 1, it is characterized in that: the method for being somebody's turn to do (4) this heat shrinkable sleeve of heat shrink, comprise from the sealed end that charges behind the thermosetting resin being heated to another openend one by one resin in the compressing resin pool and the bubble in the pre-formed articles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95121722A CN1050091C (en) | 1995-12-29 | 1995-12-29 | Method for manufacturing a composite pipe provided with a preform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95121722A CN1050091C (en) | 1995-12-29 | 1995-12-29 | Method for manufacturing a composite pipe provided with a preform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1153104A CN1153104A (en) | 1997-07-02 |
| CN1050091C true CN1050091C (en) | 2000-03-08 |
Family
ID=5082484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95121722A Expired - Fee Related CN1050091C (en) | 1995-12-29 | 1995-12-29 | Method for manufacturing a composite pipe provided with a preform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1050091C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040084614A (en) * | 2003-03-29 | 2004-10-06 | 엘지전선 주식회사 | Expansion tube of slit type heat shrinkable tube |
| CN102955362A (en) * | 2011-08-23 | 2013-03-06 | 和舰科技(苏州)有限公司 | Novel photo-resistive buffer tank |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57139553A (en) * | 1981-02-24 | 1982-08-28 | Asahi Fibreglass Co | Production of preform set |
| JPH0335030A (en) * | 1989-07-03 | 1991-02-15 | Ube Nitto Kasei Co Ltd | Production of fiber-reinforced composite molded body |
| JPH04272831A (en) * | 1991-02-27 | 1992-09-29 | Kubota Corp | Manufacture of eccentric thickness fiber reinforced resin pipe |
| US5176001A (en) * | 1991-09-30 | 1993-01-05 | Harsco Corporation | Nested tube cryogenic support system |
-
1995
- 1995-12-29 CN CN95121722A patent/CN1050091C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57139553A (en) * | 1981-02-24 | 1982-08-28 | Asahi Fibreglass Co | Production of preform set |
| JPH0335030A (en) * | 1989-07-03 | 1991-02-15 | Ube Nitto Kasei Co Ltd | Production of fiber-reinforced composite molded body |
| JPH04272831A (en) * | 1991-02-27 | 1992-09-29 | Kubota Corp | Manufacture of eccentric thickness fiber reinforced resin pipe |
| US5176001A (en) * | 1991-09-30 | 1993-01-05 | Harsco Corporation | Nested tube cryogenic support system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1153104A (en) | 1997-07-02 |
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