CN1431093A - Method for manufacturing valve body of plastic stop valve - Google Patents
Method for manufacturing valve body of plastic stop valve Download PDFInfo
- Publication number
- CN1431093A CN1431093A CN 03117371 CN03117371A CN1431093A CN 1431093 A CN1431093 A CN 1431093A CN 03117371 CN03117371 CN 03117371 CN 03117371 A CN03117371 A CN 03117371A CN 1431093 A CN1431093 A CN 1431093A
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- Prior art keywords
- valve body
- valve
- plastics
- plastic
- piece
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- 239000004033 plastic Substances 0.000 title claims abstract description 97
- 229920003023 plastic Polymers 0.000 title claims abstract description 97
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims description 28
- 239000012943 hotmelt Substances 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims abstract description 3
- 230000008018 melting Effects 0.000 claims abstract description 3
- 238000005267 amalgamation Methods 0.000 claims description 20
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims 1
- 238000001746 injection moulding Methods 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000037237 body shape Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- Valve Housings (AREA)
Abstract
A manufacturing method of a straight-through plastic stop valve body with a hot melt socket type inlet and a hot melt socket type outlet, wherein the inlet and the outlet are oppositely arranged, is characterized by comprising the following steps: a. manufacturing at least two plastic valve body splicing blocks which can be spliced into a complete stop valve body, wherein each plastic valve body splicing block is a part of the complete stop valve body; among the plastic valve body splicing blocks, at least one splicing block with the largest volume is manufactured in the following mode: heating and melting the plastic, and then cooling and forming in a mold; b. and fixedly connecting the manufactured plastic valve body splicing blocks into a complete non-detachable stop valve body. The manufacturing method of the invention is not limited by the factors of demoulding and core pulling which are mainly considered during one-time (integral) injection molding any more, and solves the technical problem which can not be solved for a long time in the valve manufacturing industry.
Description
Technical field
The present invention relates to a kind of manufacture method of valve, especially a kind of manufacture method of valve body of plastic cut-off valve.
Background technology
Through type plastic stop valve (hereinafter to be referred as plastic stop valve) has polluted source not, advantage that price is low, and under the normal condition, it should be and the matching used desirable kind of plastic water pipe.Its connected mode of different plastic water pipes is not quite similar, and for PP, PPR, PE and the steel-plastics composite pipe thereof of small-bore (φ 90mm is following), is fit to the hot melt spigot-and-socket formula and connects, and pairing plastic stop valve also all has hot melt spigot-and-socket formula interface.But its minimum flow path diameter of existing this plastic stop valve is too little, can not satisfy actual needs, does not also meet relevant regulations.Reason is that the valve body of existing this plastic stop valve normally adopts the Shooting Technique single injection-molded as a whole, the restriction that is subjected to die sinking, demoulding during formed product and looses core, runner in the valve body can not be turned, be that cost realizes the demoulding and looses core just, sacrificed requirement minimum flow path to dwindle flow diameter.The existing this plastic stop valve that has hot melt spigot-and-socket formula influent stream mouth and go out head piece all is a undergauge.How to use Shooting Technique produce that runner undergauge, in the valve body can be turned, have hot melt spigot-and-socket formula influent stream mouth and go out the plastic stop valve of head piece, be the unsolved always for a long time technical barrier of Plastic valve manufacturing industry.Chinese invention patent once disclosed a kind of Fuelinjection nozzle and manufacture method thereof No. 97191008.1, and this method has proposed to allow valve member and plastic components separate the scheme of making and regulating.During fabrication, compound valve member pushes in the through hole of plastic components subsequently, plastic components with realize firm connection of valve member by interlocking, engagement or clip.But the valve manufacture method of this patent disclosure still can not solve the problem that exists in the above-mentioned valve body of plastic cut-off valve manufacturing.
Summary of the invention
The manufacture method that the purpose of this invention is to provide a kind of valve body of plastic cut-off valve, this stop valve is a undergauge not, runner in the valve body can be turned, and have hot melt spigot-and-socket formula influent stream mouth and go out head piece, PP, the PPR, PE and the steel-plastics composite pipe thereof that are particularly suitable for small-bore (φ 90mm is following) use, and can be connected with the direct hot melt spigot-and-socket of these pipelines.
Purpose of the present invention realizes in the following manner: produce respectively earlier to piece together and have hot melt spigot-and-socket formula influent stream mouth and the hot melt spigot-and-socket formula goes out head piece, and influent stream mouth and go out the plastics valve body piece more than two or two of the through type valve body of plastic cut-off valve shape that head piece is oppositely arranged, and then these plastics valve body pieces are spliced into above-mentioned plastics valve body.Specifically, the manufacture method of valve body of plastic cut-off valve of the present invention is carried out according to the following steps: a, at least two plastics valve body pieces that capable assembling is a complete above-mentioned stop valve valve body of making, and made each plastics valve body piece is respectively the part of a complete above-mentioned stop valve valve body; In described each plastics valve body piece, the volume maximum piece is to be made as follows at least: after the plastics heat fused in mould cooling forming; B, made plastics valve body piece is mutually permanently connected is complete, a non-removable above-mentioned stop valve valve body.
In the present invention, with regard to above-mentioned plastics valve body piece, shape is fairly simple can adopt mechanical processing method to make, as processing mode is made by plastic plate or sticking plaster, plastic tube, unit of plastic being carried out car, bore, mill etc.; General can adopt after the plastics heat fused in mould the mode of cooling forming make, make as the mode of employing mould heat pressure moulding or injection mo(u)lding.Because formed in mould production method is comparatively simple and easy to do, therefore, can allow the valve body piece (or title constitutes " the main piece " of valve body) of volume maximum make at least by above-mentioned formed in mould technology.Simultaneously, comparatively economical in the injection moulding mode especially in mould-forming process, so the present invention recommends to adopt the injection moulding mode to make above-mentioned plastics valve body piece.When adopting the injection moulding mode to make above-mentioned plastics valve body piece, can also in mould, preset an inserts, after Shooting Technique was finished, this inserts will be fixed together with plastic material.Herein, set inserts can be engineering plastics (highstrenghtpiston) inserts, also can be metal insert.In addition, should have the connecting thread that can be connected on this inserts with valve gap.Here said connecting thread is an internal thread, and its path (being the internal diameter of internal thread) is greater than the diameter of minimum flow path, by this internal thread, just can realize and being connected of valve gap.Certainly, with regard to method of the present invention, above-mentioned inserts not the right and wrong setting can not.This is because when above-mentioned inserts not being set, still can valve gap be connected with valve body with other method.On set inserts, can also on the contact-making surface of itself and plastics, anti-slop serrations be set, thereby strengthen being connected of inserts and plastics.In the present invention, the connecting method that plastics valve body piece splicing is become valve body can have multiple, as amalgamation of hot melt dock or the amalgamation of hot melt spigot-and-socket interconnection system etc.The plastics valve body piece of manufacturing can be more than two or two, and each plastics valve body piece can adopt polyethylene or TPO plastics manufacturings such as polypropylene, polybutene, but valve body preferably adopts the piece of same plastic.
Make the existing method of valve body compares with aforementioned disposable (integral body) injection mo(u)lding, because manufacture method of the present invention has adopted and has made each plastics valve body piece respectively, and then the valve body production method that plastics valve body piece is spliced, therefore, when design and manufacturing plastic stop valve, just can be from the angle of enhancing product performance, choose comparatively desirable valve body shape and structure and design and make, and the demoulding that emphasis is considered when no longer being subjected to disposable (integral body) injection mo(u)lding, the restriction of the factor of loosing core.So manufacture method of the present invention has solved the unsolved always for a long time technical barrier of valve manufacturing industry, also makes the application prospect of plastic stop valve more wide.
Content of the present invention further illustrates with the following Examples, but content of the present invention is not limited only to content related among the embodiment.
Description of drawings
Fig. 1 is the schematic diagram of amalgamation valve body of plastic cut-off valve among the embodiment 1.
Fig. 2 is the state diagram after the valve body amalgamation is finished among the embodiment 1.
Fig. 3 is the schematic diagram of amalgamation valve body of plastic cut-off valve among the embodiment 2.
Fig. 4 is the state diagram after the valve body amalgamation is finished among the embodiment 2.
The specific embodiment
Embodiment 1: as shown in Figure 1, the manufacture method of the valve body of plastic cut-off valve in the present embodiment is carried out according to the following steps: a, two plastics valve body pieces 1,2 that capable assembling is a complete stop valve valve body of making, made each plastics valve body piece 1,2 is respectively the part of a complete stop valve valve body, wherein when making plastics valve body piece 1, in injection mold, insert metal insert 3 in advance with internal thread, inserts 3 and this plastics valve body piece 1 of producing are fixed together, and the path of the internal thread on this inserts is greater than the minimum flow path diameter; B, made plastics valve body piece 1,2 is mutually permanently connected is complete, a non-removable stop valve valve body.In the present embodiment, made valve body is to have hot melt spigot-and-socket formula influent stream mouth and the hot melt spigot-and-socket formula goes out head piece, and influent stream mouth and go out the through type valve body of plastic cut-off valve that head piece is oppositely arranged.The volume maximum of plastics valve body piece 1, it is the same with piece 2, all be adopt after the plastics heat fused in mould the mode of cooling forming make.In the step b of present embodiment, be the amalgamation position for the treatment of of adjacent plastics valve body piece 1,2 to be spliced into one with the hot melt spigot-and-socket ways of connecting.In the present embodiment, because the production method of plastics valve body piece 1,2 is more flexible, therefore, after the valve body amalgamation is finished (state after the valve body amalgamation is finished as shown in Figure 2), at valve seat 4 places of valve body, the position, part bending down 6 that adapts with valve seat 4 has appearred in the runner lower wall that extends to valve seat location by spigot-and-socket influent stream mouth 5, thereby the position of valve seat 4 is raised to some extent, strengthened the area of passage of valve seat upper and lower runner, the corresponding conveyance capacity that increases plastic stop valve.In the present embodiment, the concrete manufacture craft that is adopted is: pp material is added injection machine, under 180～220 ℃ temperature, raw material melted is injected the punching block of manufacturing piece 1 and 2 respectively, mold temperature is 45～60 ℃, wherein, before raw material melted is injected the mould of making piece 1, earlier metal insert 3 is preset in this mould.After injection moulding is finished, cool off and extract punching block out after 45～55 seconds, obtain piece 1,2 after being cooled to normal temperature again.After this, utilize the hot melt connector to carry out socket joint by piece 1,2 and connect, the operating temperature of hot melt connector is 260 ℃, to amalgamation face heat time heating time of piece be 4～10 seconds, suitably exert pressure after the heating, the amalgamation position for the treatment of of adjacent plastics valve body piece 1,2 is spliced into one.With regard to present embodiment, also can adopt ultrasonic plastic welder to implement hot melt and connect.State after the valve body amalgamation is finished as shown in Figure 2.
Embodiment 2: the preparation method in the present embodiment is similar to embodiment 1, different is, three plastics valve body pieces 1,2,7 (as shown in Figure 3) in step a, have been made, simultaneously, the contact-making surface with plastics valve body piece 1 of the inserts 3 that uses among the step a is provided with anti-slop serrations 8 and ring-type water stopping trough 9.Be provided with after the anti-slop serrations 8, can guarantee that this inserts 3 is more firm with being connected of plastics piece, the setting of ring-type water stopping trough 9 then can prevent flow through the outside seepage of faying face between inserts 3 and the plastics piece of liquid.In the step b of present embodiment, adopt the hot melt spigot-and-socket ways of connecting, the piece 2 that will be adjacent with plastics valve body piece 1 and the amalgamation position for the treatment of of piece 7 are spliced into one.When carrying out the hot melt spigot-and-socket connection, the employing temperature is that 260 ℃ electrical heating die head heated 4～10 seconds simultaneously to amalgamation socket 10 on the piece 1 and the amalgamation face for the treatment of on the piece 2, make the surface melting to be connected of the two, then piece 2 is inserted the amalgamation socket 10 of piece 1 rapidly.Adopt in the same way, can realize that piece 7 is connected with the hot melt of amalgamation socket 11, also be about to piece 7 and be connected with piece 1 hot melt.As shown in Figure 2, after finishing above-mentioned amalgamation, valve seat 4 places at valve body, the position, part bending down 6 that adapts with valve seat 4 has still appearred in the runner lower wall that extends to valve seat location by spigot-and-socket influent stream mouth 5, simultaneously, go out runner upper wall that head piece 12 extends to valve seat location by spigot-and-socket and the upwards bending part 13 that adapts with valve seat 4 also occurred, thereby strengthened the area of passage of valve seat upper and lower runner significantly.
Claims (7)
1, a kind of have hot melt spigot-and-socket formula influent stream mouth and the hot melt spigot-and-socket formula goes out head piece, and influent stream mouth and go out the manufacture method of the through type valve body of plastic cut-off valve that head piece is oppositely arranged, and it is characterized in that carrying out according to the following steps:
A, at least two plastics valve body pieces that capable assembling is a complete described stop valve valve body of making, made each plastics valve body piece is respectively the part of a complete described stop valve valve body; In described each plastics valve body piece, the volume maximum piece is to be made as follows at least: after the plastics heat fused in mould cooling forming;
B, made plastics valve body piece is mutually permanently connected is complete, a non-removable described stop valve valve body.
2, the manufacture method of valve body of plastic cut-off valve as claimed in claim 1, it is characterized in that described after the plastics heat fused in mould the process of cooling forming be that the mode with injection mo(u)lding is finished on injection machine.
3, the manufacture method of valve body of plastic cut-off valve as claimed in claim 1, it is characterized in that when making a plastics valve body piece, in mould, preset a inserts with internal thread, this inserts is fixed together with plastics behind the hot melting plastic cooling forming, and the path of the internal thread on the described inserts is greater than the minimum flow path diameter.
4, the manufacture method of valve body of plastic cut-off valve as claimed in claim 3 is characterized in that described inserts is a metal insert, this inserts be provided with anti-slop serrations with the plastics contact-making surface.
5, the manufacture method of valve body of plastic cut-off valve as claimed in claim 1 is characterized in that described each plastics valve body piece is formed by the TPO plastic production.
6, as the manufacture method of claim 1 or 2 or 3 or 4 or 5 described valve body of plastic cut-off valve, it is characterized in that in step b, in the mode of hot melt butt joint the amalgamation position for the treatment of of adjacent plastics valve body piece is spliced into one.
7, as the manufacture method of claim 1 or 2 or 3 or 4 or 5 described valve body of plastic cut-off valve, it is characterized in that in step b, adopt the hot melt spigot-and-socket ways of connecting that the amalgamation position for the treatment of of adjacent plastics valve body piece is spliced into one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031173713A CN1194856C (en) | 2003-02-28 | 2003-02-28 | Method for manufacturing valve body of plastic stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031173713A CN1194856C (en) | 2003-02-28 | 2003-02-28 | Method for manufacturing valve body of plastic stop valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1431093A true CN1431093A (en) | 2003-07-23 |
| CN1194856C CN1194856C (en) | 2005-03-30 |
Family
ID=4790729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031173713A Expired - Lifetime CN1194856C (en) | 2003-02-28 | 2003-02-28 | Method for manufacturing valve body of plastic stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1194856C (en) |
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2003
- 2003-02-28 CN CNB031173713A patent/CN1194856C/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| CN1194856C (en) | 2005-03-30 |
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Granted publication date: 20050330 |
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| CX01 | Expiry of patent term |