CN1383941A - Process of making synthetic resin pipe joint with metal connecting part - Google Patents
Process of making synthetic resin pipe joint with metal connecting part Download PDFInfo
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- CN1383941A CN1383941A CN01125270A CN01125270A CN1383941A CN 1383941 A CN1383941 A CN 1383941A CN 01125270 A CN01125270 A CN 01125270A CN 01125270 A CN01125270 A CN 01125270A CN 1383941 A CN1383941 A CN 1383941A
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- China
- Prior art keywords
- connecting piece
- metal connecting
- synthetic resin
- pipe joint
- resin pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/02—Welded joints; Adhesive joints
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/03—Injection moulding apparatus
- B29C45/13—Injection moulding apparatus using two or more injection units co-operating with a single mould
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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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
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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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Disclosed is a method of manufacturing a synthetic resin pipe joint with a metallic connecting member. The joint is obtained by insert-molding a metallic connecting member containing connecting device for fixing a metal pipe. The method comprises heating the contact surface of the metallic connecting member and the synthetic resin after insert-molding.
Description
Technical field
The present invention relates generally to a kind of pipe-joint manufacturing method, more precisely, relates to a kind of manufacture method that has the synthetic resin pipe joint of a metal connecting piece that is used for connecting metal tube.
Background technology
In the last few years, in water pipe, force feed pipeline or gas piping field, good plastic conduit in light weight and flexible had accounted for superiority.But, also to use metal tube at the position that needs are airtight, and can be the use that combines of plastic conduit and metal tube.
Under plastic conduit and the situation that metal tube is used in combination, need be used for the pipe joint that two kinds of pipes are connected.Therefore, the pipe joint of prior art relates to and uses a kind of plastic conduit that has metal connecting piece, be embossed in an end of synthetic resin pipe joint comprising the metal connecting piece of the jockey that is made of external screw thread or internal thread, plastic conduit then is inserted into the other end of this pipe joint and welding thereon with being embedded into formula.
Yet metal and synthetic resin are to be difficult to bonding and to separate on the contact-making surface between metal and the synthetic resin easily originally.A kind of synthetic resin pipe joint of such formation is disclosed in the utility model prospectus 57-48388 of Japan, promptly on metal connecting piece and the contacted contact-making surface of synthetic resin, be formed with the polyolefin layer of a sex change, so that improve at the metal connecting piece of above-mentioned synthetic resin pipe joint and the bonding force between the synthetic resin.
When metal part is adhered to synthetic resin and partly gets on by the sex change polyolefin layer, though bonding force can be brought up to a certain degree but still be not enough.Effect thereon has such as bending and reverses under the situation of such external load, and metal part division and combination resin partly is easy to separate.
The invention root is wanted
Main purpose of the present invention provides and a kind ofly can prevent metal connecting piece and synthetic resin synthetic resin pipe joint that has metal connecting piece and manufacture method thereof disconnected from each other.
According to the present invention, above-mentionedly prevent that purpose disconnected from each other between metal connecting piece and the synthetic resin from reaching by a kind of like this configuration, it is a kind of synthetic resin pipe joint that has metal connecting piece, this joint comprises: one forms and is connected and opposite side and the molding that a plastic conduit is connected with a metal tube on a side by inlaying metal connecting piece of mold pressing, comprises a jockey that is used for fixing metal tube; Wherein, described metal connecting piece is provided with and is used for preventing that the cavity that described connector and synthetic resin are peeled off mutually and the inboard of described metal connecting piece from scribbling synthetic resin during inlaying mold pressing.
In addition, cavity is formed on the inboard and the outside of described metal connecting piece.In addition, the metal connecting piece of synthetic resin pipe joint is provided with cavity, and the resin part that is full of this cavity has then constituted resistance.Therefore, the synthetic resin pipe joint that has metal connecting piece consists essentially of one by inlaying the resin mold casting die that the stamped metal connector forms, and this metal connecting piece comprises the jockey that is used for fixing metal tube.More precisely, have in the synthetic resin pipe joint of metal connecting piece at this, metal tube is connected an end of pipe joint, and plastic conduit then is connected its other end, and metal connecting piece is provided with and is used for preventing connector and synthetic resin cavity disconnected from each other.
Cavity forms in the tube axis direction, has prevented that thus metal connecting piece and synthetic resin are disconnected from each other along what promptly directly make progress perpendicular to this tube axis direction.Perhaps, cavity is along perpendicular to the radially formation of tube axis, prevented disconnected from each other along the tube axis direction of metal connecting piece and synthetic resin thus.Best, cavity is along perpendicular to radially and along the tube axis direction the forming of tube axis, therefore prevented metal connecting piece and synthetic resin along the tube axis direction and radially go up disconnected from each other.
Prevent that simultaneously metal connecting piece and synthetic resin from relating to a kind of like this configuration along tube axis direction and separating of radially going up, promptly this cavity should be formed obliquely, and should be equipped with in this cavity along tube axis direction and the part that radially is meshed with it.
Above-mentioned cavity has prevented that metal connecting piece and synthetic resin are along pipe along axis direction and/or along radially disconnected from each other perpendicular to tube axis.In order to prevent this separation more reliably,, also have hook portion coarse, that protrude to insert in the synthetic resin across preferably except the cavity that forms on the contact-making surface of metal connecting piece and synthetic resin.
Be in rotational direction disconnected from each other that prevents to produce owing to reversing, the best metal connector is provided with a rotation that presents analogous shapes such as rough form and prevents part and cavity.
As mentioned above, provide and have cavity or rotation and prevent that the metal connecting piece of part is for preventing that the disconnected from each other of metal connecting piece and synthetic resin from being effective.But above-mentioned cavity and rotation prevent that part from will cause that when injection model the instability of resin flows.Particularly in metal connecting piece for preventing to rotate under the situation that forms a hole as shown in Figure 8, the generation that will be appreciated that an adhesion is enough to cause the peeling off of stratiform of synthetic resin layer, and in resin, produce the crackle that causes fluid to leak easily, as shown in Figure 8.
The inventor is in order to get rid of the problems referred to above, have been found that and to avoid making resin to produce the generation of peeling off of unstable adhesion of flowing and stratification and the generation of crackle in breach by repeating various tests, this relates to preferably makes chamfering all to the part of the corner angle part that is present in the metal connecting piece on the contact-making surface between metal connecting piece and the synthetic resin, perhaps forms a flute profile breach and is used as rotating and prevents part.
Created the another one invention based on this understanding, metal connecting piece in above-mentioned synthetic resin pipe joint is provided with cavity or rotation prevents part and cavity, and this metal connecting piece is made into the part of the corner angle of the metal connecting piece on the contact-making surface that is present between metal connecting piece and synthetic resin part has preferably been made chamfering all.According to another invention, the above-mentioned structure that is provided with cavity and rotates the synthetic resin pipe joint of the metal connecting piece prevent part that comprises is used as rotating and prevents part by forming the flute profile breach.
According to another invention of imagining out as the combination of foregoing invention, the above-mentioned synthetic resin pipe joint that is provided with cavity and rotates the metal connecting piece that prevents part that comprises should constitute like this, partly part or all of corner angle that promptly is present in the metal connecting piece on the contact-making surface between metal connecting piece and the synthetic resin all made chamfering, and rotation prevents that part is formed with the flute profile breach.
According to each invention in the foregoing invention, in order to strengthen the bonding force of metal connecting piece, be preferably in and form a sex change polyolefin layer on the contact-making surface between metal connecting piece and the synthetic resin synthetic resin, perhaps the sex change polyolefin is blended in the synthetic resin.
To achieve these goals, manufacture method of the present invention can constitute like this, comprises that promptly a metal connecting piece that is used for fixing the jockey of metal tube inlays mold pressing, and metal connecting piece heats after inlaying mold pressing with the contact-making surface of synthetic resin.
Can recognize from the test of many times that the inventor carried out,, metal connecting piece closely is bonded on the synthetic resin by under the softening temperature of synthetic resin or higher temperature, the contact-making surface of metal connecting piece with synthetic resin being heated.This can be from following true inference come out (it is contemplated that out), i.e. the volumetric expansion that causes by heating and melting when resin has increased resin pressure and the degree that is press-fit in the metal connecting piece has also increased.
In order to improve the bond properties between metal connecting piece and synthetic resin, preferably supporting member forming by metal, pottery and timber or from the outside or from the inboard, perhaps from inboard and two aspects, the outside pack into need with the bonding resin of connector partly.Then, by in this supporting member institute's tight adhesion or be press-fit to heat on the position of this synthetic resin part office and make the supporting member fusion.When the resin volume of contact-making surface expanded, the expansion of resin part was subjected to the restriction of supporting member, thereby this resin more closely was pressed into be engaged in the connector.
In order to improve the bond properties between metal connecting piece and synthetic resin, as mentioned above, be preferably on the contact-making surface of metal connecting piece and synthetic resin a sex change polyolefin layer is set, perhaps the sex change polyolefin is blended in the synthetic resin to be injected.By packing in the shaping mould and it inlayed the synthetic resin pipe joint that mold pressing just can obtain having the metal connecting piece with sex change polyolefin layer scribbling the polyolefinic metal connecting piece of sex change.
Can comprise sex change polyolefin the method on the metal connecting piece of being coated in the use of various known conventional methods, for example a kind ofly come the polyolefinic method of heating and melting sex change by electrostatic coating method or fluidization dip coating method, the method of a kind of heating and melting sex change polyolefin film or heating and melting metal connecting piece, and a kind of method of in polyolefinic emulsion of sex change or solution, flooding.When carrying out coating with the sex change polyolefin, preferably use the surface of strong acid aqueous solution, strong alkali aqueous solution or washing agent elder generation clean metal connector in advance, cleaning later on or do not cleaning and use the bonding quality improver immediately, for example titanium alkoxides is lost processing (primer treatment).Thereby just can obtain bond properties more closely.
Best, the sex change polyolefin that is coated on the metal connecting piece is to handle under the condition of alcohol coexistence.Can limit the resin part thus As time goes on degenerate to metal bonding strength partly.The example of alcohol used herein can be the aliphatic alcohol such as isobutene alcohol, and such as the dihydroxy alcohol of ethylene glycol.But ethylene glycol alcohol is more desirable.
Usually, heat treated was carried out about 200 ℃ 30 minutes-several hours.The sex change polyolefin that be coated on the metal connecting piece this moment still keeps contacting with alcohol.Be coated in sex change polyolefin coating thickness range on the metal connecting piece generally between the 1-104 micron, be preferably between 5-5 * 102 micron.The sex change polyolefin can be to connect the skill copolymerization and the polyolefin of sex change by the such unsaturated carboxylic acid of all like acrylic acid of at least a sex change monomer and butene dioic acid, unsaturated carboxylic acid anhydrides as anhydrous butene dioic acid and the unsaturated epoxide as unsaturated carboxylic acid acid amides and GMA.
The monomer component content that is preferably in the sex change polyolefin is 0.001-5% with respect to the scope of the polyolefinic percentage by weight of sex change.The sex change polyolefin can also relate to the use of compound, in this compound, all polyolefin all by above-mentioned sex change monomer sex change and with unmodified polyolefin blend.
On the other hand, having the synthetic resin pipe joint that is mixed with the polyolefinic metal connecting piece of sex change can obtain by following method: metal connecting piece is put into shaping mould, again the sex change polyolefin is blended in the synthetic resin, and this is mixed with the polyolefinic synthetic resin of sex change inlays mold pressing.The temperature that contact-making surface between metal connecting piece and the synthetic resin is heated generally is preferably in 120 ℃-350 ℃, and this temperature is enough to the part of fusion at least synthetic resin.If heating-up temperature is far below this scope, effect will reduce.Because of when heating-up temperature is much higher than this scope, will causes the thermal metamorphism of resin, and reduced bonding strength.
Heat time heating time is different with pipe joint, does not do concrete qualification.If but heat time heating time is too short, the fusion of resin just not exclusively.And if heat time heating time is oversize, just can not obtains high production rate and may cause the rotten of resin.Therefore, the general range of heat time heating time is 5-500 second, is preferably 20-100 second.Heating means to the contact-making surface resin can comprise the method that for example by heater is contacted with metal connecting piece its is heated, by using electromagnetic wave, such as microwave or ultrasonic wave, come the method for heating of metal connector, come method that it is heated etc. in the high temperature oil groove by metal connecting piece is immersed in.Therefore have only metal connecting piece just to be heated, this is simple and meets the requirements.Yet after inlaying mold pressing, whole pipe joint can also heat in shaping membrane once more.
When inlaying mold pressing, can be setting inject time longlyer by increasing resin pressure than common clamp time, even if at molten resin when stream has been full of the after-applied injection pressure of shaping mould, molten condition still can continue.Therefore, according to this method, inlaying mold pressing can be longer than the common time cycle that mold pressing had, even and be full of resin at the contact-making surface between metal connecting piece and the synthetic resin in shaping mould and still can remain on certain temperature that is higher than resin softening point later on.
According to each above-mentioned invention, cast iron, copper, aluminium and aluminium alloy can be used for metal connecting piece as metal material, do not have special restriction herein.The jockey that is used for fixing metal tube relates to for example use of screw, welding, union nut etc.According to each invention that provides above, being not particularly limited this synthetic resin as the synthetic resin of pipe joint is to belong to thermoplastic resin.Thermoplastic resin is meant for example polyethylene, polypropylene, PB Polybutene-1, polyolefin etc., such as crosslinked polyethylene, polyvinyl chloride, polyester, acid amides and bunching an aromatic plant metioned in ancient books etc.
The method according to this invention, this synthetic resin pipe joint can be used for realizing metal tube is connected with plastic conduit, also can be used to realize the connection of metal tube between mutual.
Description of drawings
Other purposes of the present invention and advantage are by following detailed description and perfectly clear together with inciting somebody to action with reference to the accompanying drawings, in the accompanying drawing:
Fig. 1 illustrates a front view that has the synthetic power fat pipe joint of metal connecting piece;
Fig. 2 illustrates of the present invention this to have the cutaway view of major part of the synthetic resin pipe joint of metal connecting piece;
Fig. 3 shows dope layer and the sex change polyolefin layer is the cutaway view that how to place an amplification between metal connecting piece and the crosslinked polyethylene;
Fig. 4 illustrates the cutaway view that utilizes the method that heater heats the synthetic resin pipe joint that has metal connecting piece;
Fig. 5 is a kind of cutaway view of articulation form that has the synthetic resin pipe joint of metal connecting piece;
Fig. 6 is the cutaway view that another example of the synthetic resin pipe joint that has metal connecting piece is shown;
Fig. 7 is the cutaway view that is shown in the synthetic resin pipe joint that has metal connecting piece among another embodiment; And
Fig. 8 is the cutaway view that is shown in the synthetic resin pipe joint that has metal connecting piece in the comparison example.
The preferred embodiment explanation
Fig. 1 shows an example that comprises the synthetic resin pipe joint 12 of the metal connecting piece 11 of inlaying mold pressing.Union body is formed by crosslinked polyethylene, it is exactly general said electrical fused joint, the one end embedding the heated filament (not shown), this structure should be able to be earlier inserted polyethylene pipe 13, make heating wire stipulated time of energising to be combined on the fittings body by heat fusing then.
Metal connecting piece 11 has the external screw thread of using as the jockey of fixing metal pipe (not shown) 15.Extend cavity 17 along the tube axis direction and form, to stop radially disconnected from each other along perpendicular to tube axis of metal connecting piece 11 and crosslinked polyethylene 16, as shown in Figure 2 in contact portion with crosslinked polyethylene 16.Also form therein along the cavity 18 that radially extends, to stop metal connecting piece 11 and crosslinked polyethylene 16 disconnected from each other perpendicular to tube axis.In addition, metal connecting piece 11 comprises and is used for preventing definitely its lug boss that comes off 19 and groove 20.Metal connecting piece 11 also is formed with a shallow slot v notch v 21 on the end face of tube axis direction.
The mold pressing of inlaying of metal connecting piece 11 is included on this metal connecting piece and coats bed material, its is immersed to demonstrate in the sex change polyolefin of viscosity then, and it is covered by the sex change polyolefin, then it is put into finishing die, again the injection moulding crosslinked polyethylene.Thus, the sex change polyolefin layer 24 through initial bed 23 and viscosity on the metal connecting piece 11 has covered crosslinked polyethylene layer 16, as shown in Figure 3.
Secondly, the synthetic resin pipe joint that is in the band metal connecting piece of (as shown in Figure 4) under core shape metal carrier 27 its inner states of insertion should support in this wise, promptly metal connecting piece 11 is screwed in the heater 28, by these heater 28 heating, the sex change polyolefin 24 (not shown at Fig. 4) that places between connector 11 and the crosslinked polyethylene 16 is melted by heating then.Thus, sex change polyolefin layer 24 is subjected to adding thermal expansion and is force-fitted in the metal connecting piece 11 by its resin pressure.
Fig. 5 shows a kind of synthetic resin pipe joint that has metal connecting piece of articulation form.The metal connecting piece 31 that comprises axle collar 31a is the same with the situation of above-mentioned metal connecting piece 11 is inlayed mold pressing being under the state of installing the union nut 32 with internal thread 33.Along forming and form flute profile breach 36 in contact portion in case spline is moving with crosslinked polyethylene 34 perpendicular to the cavity 35 that radially extends of tube axis.Then, all chamferings of the corner angle of all contact-making surfaces that contact with crosslinked polyethylene part.
Fig. 6 shows another example of the synthetic resin pipe joint that has metal connecting piece.Have that situation as the metal connecting piece 39 of the internal thread 38 of jockey and above-mentioned metal connecting piece 11 is the same is inlayed mold pressing.With the contact portion of crosslinked polyethylene 40 on be formed with along the cavity 41 that radially extends perpendicular to tube axis, cavity 42 that extends in the tube axis direction and flute profile breach 43 are in case spline is moving.Then, all chamferings of the corner angle that contact with crosslinked polyethylene part.
Shown in above-mentioned reality is fallen each all is to be used for polyethylene pipe is connected synthetic resin pipe joint on the metal tube.But in the other example, connector is inlayed the two ends that are embossed in union body, and metal tube just can be connected to each other.
(embodiment 1)
The surface of its structure brass connector 45 is as shown in Figure 7 handled through pertitanate and is formed a titanium oxide film.Then this brass connector is coated the Industries by Mitsui Petrochemical by the fluidization infusion process, sex change polyolefin (brand name " the ADMER ") powder of the viscosity that Ltd. makes.The connector of dusting is contacted, again 200 ℃ of following heat treated one hour with the ethylene glycol vapor phase.Then it is placed in the shaping mould and carries out injection moulding, obtain synthetic resin pipe joint shown in Figure 7 thus with crosslinked polyethylene.Subsequently the inside and outside of synthetic resin pipe joint that obtains carried out visual examination and should can't see crackle.
Then, around this synthetic resin pipe joint, carry out following cold/hot water Hammering Test.
Temperature is that 7 ℃ cold water flowed 3.5 minutes, and the order of magnitude is that the water hammering of 17.5 kilograms per centimeter 2 carries out totally 2 seconds 3 times.Subsequently, temperature is 85 ℃ a hot water flow 2.5 minutes, and carries out water hammering 3 times with this hot water.Is whole 6 minutes time sets that use cold-peace hot water to carry out the cold/hot water Hammering Test circulation, repeats 100000 times or more times circulation should not have water to spill.
(embodiment 2)
Synthetic resin pipe joint that passes through the band metal connecting piece that method obtained described in the embodiment 1 that is shown in Fig. 7 is by using heater shown in Figure 4 28 and being heated to 320 ℃ of totally 60 seconds therein.In the past in 60 seconds and after, same pipe joint is drawn off from heater 28 by dipping cooling in 20 ℃ of water.
After this synthetic resin pipe joint that has metal connecting piece had heated as above-mentioned usefulness heater 28, the contact-making surface between metal connecting piece 45 and resin can be pruned cutter with one.Subsequently, when attempting to clamp with pliers and separating this metal connecting piece, this metal connecting piece does not have separated.
(comparison example 1)
Except replacing breach 46 such structures among Fig. 7 along forming hole 47 in the cavity 48 that radially extends perpendicular to tube axis, the synthetic resin pipe joint that has metal connecting piece that is shown in Fig. 8 is by using the metal connecting piece 49 with metal connecting piece 45 same structures that are shown in Fig. 7 to obtain according to the same quadrat method described in the embodiment 1.
As the result who carries out with the identical cold/hot water Hammering Test of embodiment 1, when test reaches 5000 circulation times, water just begins to spill.
When this moment during, find to have produced adhesion and exfoliatedly be enough on joint inner surface resin bed, produce crack 50, as shown in Figure 8 to this synthetic resin pipe joint of inside and outside visual examination.
(comparison example 2)
In by the synthetic resin pipe joint that has metal connecting piece that structure obtained shown in the method among the embodiment 1 and Fig. 7, make this metal connecting piece 45 by with embodiment 2 in same quadrat method, but do not heat-treat, bear separation test by heater.As a result, this metal connecting piece has just separated by a little power.
According to synthetic resin pipe joint and the manufacture method thereof that has metal connecting piece of the present invention that has so far described in detail, it has following good effect.
Specifically, the synthetic resin pipe joint that has metal connecting piece of the present invention can prevent that metal connecting piece and synthetic resin are disconnected from each other, and this relates to and forms cavity and make resin be full of the resistance that these cavitys form owing to inlaying mold pressing in the metal coupling part.
In addition, the synthetic resin joint that has metal connecting piece of the present invention can prevent metal connecting piece in synthetic resin along perpendicular to radially being separated from each other of tube axis, this relates in the tube axis direction and forms cavity.
Moreover the synthetic resin pipe joint that has metal connecting piece of the present invention can prevent that metal connecting piece and synthetic resin are separated from each other along the tube axis direction, and this relates to and is radially forming cavity.
In addition, the synthetic resin pipe joint that has metal connecting piece of the present invention can prevent metal connecting piece and synthetic resin or along the tube axis direction or radially be separated from each other, this relates to along the tube axis direction with along the radially formation cavity perpendicular to tube axis, perhaps is formed obliquely cavity.
Also have, the synthetic resin pipe joint that has a metal connecting piece of the present invention is separated from each other thereby can prevent two more reliably by making the contact surface of a coarse projection that contacts across with synthetic resin.
In addition, in the synthetic resin pipe joint that has a metal connecting piece of the present invention when the corner angle of the metal connecting piece on the contact-making surface that is present between metal connecting piece and synthetic resin part all after the chamfering, resin flow is just steady during injection model, and adhesion just is difficult to form.
Moreover, in the synthetic resin pipe joint that has a metal connecting piece of the present invention, be provided with a rotation on the metal connecting piece and prevent part, thereby can prevent that metal connecting piece and synthetic resin in rotational direction are separated from each other.
At this moment, when rotation prevents part when being formed with the flute profile breach,, thereby can prevent the generation of crack, exfoliated and adhesion because when injection model, this breach can not hinder flowing stably of resin.
In addition, in the synthetic resin pipe joint that has a metal connecting piece of the present invention, between metal connecting piece and synthetic resin, be provided with the polyolefin layer of sex change, thereby improved the bonding strength of synthetic resin metal connecting piece.
On the other hand, according to the manufacture method that has the synthetic resin pipe joint of metal connecting piece of the present invention, metal connecting piece with the jockey that is used for fixing metal tube is inlayed mold pressing earlier, is heated subsequently again, and resin just is pressed into and is engaged on the metal connecting piece thus.Thereby metal connecting piece just can be by combination tightly.
In addition, according to the manufacture method that has the synthetic resin pipe joint of metal connecting piece of the present invention, metal connecting piece is coated with the sex change polyolefin earlier, carries out injection-molding then; Another method is, injection-molding carries out with a kind of mixture that the sex change polyolefin is blended in the synthetic resin, thereby synthetic resin just can improve widely to the bonding force of metal connecting piece.
And, according to the manufacture method that has the synthetic resin pipe joint of metal connecting piece of the present invention, above-mentioned inlay mold pressing after, heat treated is carried out this supporting member is packed the situation of synthetic resin into from inboard and/or the outside under, the expansion of resin that utilized this support limits thus.Thereby resin more closely is pressed into and is engaged in the metal connecting piece.
In addition, according to the manufacture method that has the synthetic resin pipe joint of metal connecting piece of the present invention, heat treated is utilized heater, electromagnetic wave or is immersed in a medium method of high temperature oil groove and carries out, thus can be so that only metal connecting piece is heated.
In addition, according to the manufacture method that has the synthetic resin pipe joint of metal connecting piece of the present invention, the contact-making surface that metal connecting piece and synthetic resin are in contact with one another is formed by the sex change polyolefin layer; Another method is; the sex change polyolefin is blended in the synthetic resin to be injected; and sustainable the affacting of the injection pressure that is acted on when inlaying mold pressing has been full of in the shaping mould after the resin, is convenient to moulding machine thus and heats efficiently and need not to provide specially heater or heating steps.
In addition, according to the manufacture method that has the synthetic resin pipe joint of metal connecting piece of the present invention, metal connecting piece is formed with cavity or rotation prevents part, thus can prevent metal connecting piece and synthetic resin along the tube axis direction and radially and/or rotation direction be separated from each other.
Moreover, according to the manufacture method that has the synthetic resin pipe joint of metal connecting piece of the present invention, after in advance with strong acid aqueous solution or strong alkali aqueous solution or washing agent clean metal surface, perhaps with the bonding quality improver to the processing of metal connecting piece erosion property after, on metal connecting piece, be coated with the sex change polyolefin again.Make the bonding of metal connecting piece tightr thus.
In addition, according to the manufacture method that has the synthetic resin pipe joint of metal connecting piece of the present invention, the sex change polyolefin that is coated on the metal connecting piece is to carry out heat treated under the condition of alcohol coexistence, thereby can prevent that As time goes on the resin part from degenerating to the bonding strength of metal part.
Obviously, under situation without departing from the spirit and scope of the present invention, can on basis of the present invention, form many different working methods.Therefore, the present invention is not subjected to the restriction of above-mentioned concrete working method and only is subjected to the qualification of claims.
Claims (9)
1. manufacture method that has the synthetic resin pipe joint of metal connecting piece, this pipe joint obtains by the described metal connecting piece of inlaying mold pressing and comprising the jockey that is used for fixing metal tube, and described method comprises:
The step that after inlaying mold pressing, described metal connecting piece is heated with the contact-making surface of this synthetic resin.
2. the manufacture method that has the synthetic resin pipe joint of metal connecting piece as claimed in claim 1 is characterized in that: the described polyolefinic metal connecting piece that scribbles sex change is inlayed mold pressing.
3. the manufacture method that has the synthetic resin pipe joint of metal connecting piece as claimed in claim 1 is characterized in that: the polyolefin of sex change is blended in this synthetic resin that is used for inlaying the mold pressing injection.
4. as each described manufacture method that has the synthetic resin pipe joint of metal connecting piece among the claim 1-3, it is characterized in that: this heating is to carry out under the situation a supporting member is packed this synthetic resin part into from inboard and/or the outside.
5. the manufacture method that has the synthetic resin pipe joint of metal connecting piece as claimed in claim 1 is characterized in that: described metal connecting piece is provided with cavity and/or a rotation prevents part.
6. the manufacture method that has the synthetic resin pipe joint of metal connecting piece as claimed in claim 4 is characterized in that: this heating is by a heater being contacted with described metal connecting piece or carrying out by the such electromagnetic wave of effect such as ultrasonic wave or microwave on described metal connecting piece or by described metal connecting piece is immersed in the high temperature oil groove.
7. the manufacture method that has the synthetic resin pipe joint of metal connecting piece as claimed in claim 6 is characterized in that: described metal connecting piece is provided with cavity and/or a rotation prevents part.
8. as any one described manufacture method that has the synthetic resin pipe joint of metal connecting piece among the claim 1-3, it is characterized in that: this heating is by a heater being contacted with described metal connecting piece or carrying out by the such electromagnetic wave of effect such as ultrasonic wave or microwave on described metal connecting piece or by described metal connecting piece is immersed in the high temperature oil groove.
9. the manufacture method that has the synthetic resin pipe joint of metal connecting piece as claimed in claim 8 is characterized in that: described metal connecting piece is provided with cavity and/or a rotation prevents part.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP623/96 | 1996-01-08 | ||
| JP62396 | 1996-01-08 | ||
| JP623/1996 | 1996-01-08 | ||
| JP301498/96 | 1996-11-13 | ||
| JP301498/1996 | 1996-11-13 | ||
| JP08301498A JP3081864B2 (en) | 1996-01-08 | 1996-11-13 | Synthetic resin pipe joint with metal connecting member and method of manufacturing the same |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97102035A Division CN1082426C (en) | 1996-01-08 | 1997-01-08 | Shmthetic resin pipe joint with metallic connecting member and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1383941A true CN1383941A (en) | 2002-12-11 |
| CN1182928C CN1182928C (en) | 2005-01-05 |
Family
ID=26333641
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97102035A Expired - Lifetime CN1082426C (en) | 1996-01-08 | 1997-01-08 | Shmthetic resin pipe joint with metallic connecting member and manufacturing method thereof |
| CNB011252707A Expired - Lifetime CN1182928C (en) | 1996-01-08 | 1997-01-08 | Process of making synthetic resin pipe joint with metal connecting part |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97102035A Expired - Lifetime CN1082426C (en) | 1996-01-08 | 1997-01-08 | Shmthetic resin pipe joint with metallic connecting member and manufacturing method thereof |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3081864B2 (en) |
| KR (1) | KR100446547B1 (en) |
| CN (2) | CN1082426C (en) |
| TW (2) | TW519212U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102029680A (en) * | 2010-10-29 | 2011-04-27 | 湖北鄂丰模具有限公司 | Forming device of steel band reinforced polythene spiral corrugated pipe connection part |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11325362A (en) | 1998-05-13 | 1999-11-26 | Smc Corp | Pipe joint |
| EP1198334B1 (en) * | 1999-06-01 | 2006-02-01 | Stant Manufacturing Inc. | Method of forming a venting apparatus for a fuel tank |
| KR100446197B1 (en) * | 2000-10-26 | 2004-09-07 | 김진태 | Combination pipe manufacture method |
| FI115665B (en) | 2002-11-08 | 2005-06-15 | Uponor Innovation Ab | A connecting piece |
| FR2877883B1 (en) † | 2004-11-15 | 2008-05-23 | Inergy Automotive Systems Res | PLASTIC BIT FOR FUEL TANK |
| JP4839157B2 (en) * | 2006-09-06 | 2011-12-21 | 積水化学工業株式会社 | Pipe fitting |
| JP4631844B2 (en) * | 2006-12-04 | 2011-02-16 | 株式会社ジェイテクト | Pressure gauge |
| JP5401979B2 (en) * | 2008-12-25 | 2014-01-29 | 三菱樹脂株式会社 | Pipe fitting |
| CN101988611B (en) * | 2009-08-01 | 2012-12-26 | 泰州申视塑料有限公司 | Connection method of ultrahigh molecular weight polyethylene pipelines |
| KR100952354B1 (en) * | 2009-11-20 | 2010-04-09 | 문영달 | Tube joint for water distribution and the manufacturing method thereof |
| CN103822033B (en) * | 2014-03-17 | 2015-09-30 | 吴伟锋 | Metal connecting piece |
| KR102259638B1 (en) | 2016-05-03 | 2021-06-02 | 엘지전자 주식회사 | linear compressor |
| JP6912277B2 (en) * | 2017-06-08 | 2021-08-04 | 矢崎エナジーシステム株式会社 | Battery pack |
| CN107877778A (en) * | 2017-12-08 | 2018-04-06 | 蔡凡 | The preparation technology and method of high-precision configuration on a kind of ceramic member |
| KR102374207B1 (en) * | 2020-03-11 | 2022-03-14 | 김동영 | Pipe connector for dischairging condensate water of air conditioner |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55174084U (en) * | 1979-05-31 | 1980-12-13 | ||
| US5112084A (en) * | 1989-02-07 | 1992-05-12 | Usui Kokusai Sangyo Kaisha, Ltd. | Connector for small-diameter piping |
| JP2829671B2 (en) * | 1990-09-26 | 1998-11-25 | 株式会社竹中工務店 | Automatic direction control method for excavator etc. |
| JPH04138193U (en) * | 1991-06-18 | 1992-12-24 | 株式会社栗本鐵工所 | Pipe fitting insert fittings |
-
1996
- 1996-11-13 JP JP08301498A patent/JP3081864B2/en not_active Expired - Fee Related
- 1996-12-26 TW TW087208755U patent/TW519212U/en not_active IP Right Cessation
- 1996-12-26 TW TW085116097A patent/TW380190B/en not_active IP Right Cessation
- 1996-12-30 KR KR1019960077593A patent/KR100446547B1/en active IP Right Grant
-
1997
- 1997-01-08 CN CN97102035A patent/CN1082426C/en not_active Expired - Lifetime
- 1997-01-08 CN CNB011252707A patent/CN1182928C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102029680A (en) * | 2010-10-29 | 2011-04-27 | 湖北鄂丰模具有限公司 | Forming device of steel band reinforced polythene spiral corrugated pipe connection part |
| CN102029680B (en) * | 2010-10-29 | 2013-04-24 | 湖北鄂丰模具有限公司 | Forming device of steel band reinforced polythene spiral corrugated pipe connection part |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09250675A (en) | 1997-09-22 |
| KR100446547B1 (en) | 2004-11-03 |
| CN1169907A (en) | 1998-01-14 |
| TW380190B (en) | 2000-01-21 |
| TW519212U (en) | 2003-01-21 |
| KR970059559A (en) | 1997-08-12 |
| JP3081864B2 (en) | 2000-08-28 |
| CN1082426C (en) | 2002-04-10 |
| CN1182928C (en) | 2005-01-05 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: MITSUI CHEMICALS CO. Free format text: FORMER OWNER: MITSUI CHEMICALS, INC. Effective date: 20080704 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080704 Address after: Tokyo, Japan, Japan Patentee after: Mitsui Chemicals Polyurethanes Inc. Address before: Tokyo, Japan, Japan Patentee before: Mitsui Chemical Industry Co., Ltd. |
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| CX01 | Expiry of patent term |
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