CN105422947A - Injection-molded plastic stop valve body and manufacturing method - Google Patents
Injection-molded plastic stop valve body and manufacturing method Download PDFInfo
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- CN105422947A CN105422947A CN201510622249.0A CN201510622249A CN105422947A CN 105422947 A CN105422947 A CN 105422947A CN 201510622249 A CN201510622249 A CN 201510622249A CN 105422947 A CN105422947 A CN 105422947A
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- valve
- core
- valve body
- cavity
- influent stream
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Disclosed are an injection-molded plastic stop valve body and a manufacturing method. The injection-molded plastic stop valve body is provided with a flow inlet, a flow outlet, a valve cover connecting opening and a valve seat, wherein the valve seat is provided with a valve seat opening; a flow inlet passage is arranged between the flow inlet and the valve seat opening, and a cavity formed from the flow inlet in a core pulling mode during injection molding serves as the flow inlet passage; a valve body inner cavity is arranged between the valve seat and the valve cover connecting opening, and a cavity formed from the valve cover connecting opening in a core-pulling mode during injection molding serves as the valve body inner cavity; a flow outlet passage is arranged between the valve body inner cavity and the flow outlet, and a cavity formed from the flow outlet in a core-pulling mode during injection molding and a cavity formed from the inner wall of the flow outlet side of the valve body inner cavity in a lateral core-pulling mode serve as the flow outlet passage together. By means of the plastic stop valve body of the structure, on the premise that the overall quality of the valve body can be completely controlled and guaranteed, the plastic stop valve body economically, conveniently and fundamentally achieves a sufficient drift diameter runner section which is required by the national/international standards and can not be achieved for a long time.
Description
Technical field
The present invention relates to a kind of valve body of plastic cut-off valve structure of molding and forming, is specifically a kind of valve body of plastic cut-off valve structure that can realize having sufficient latus rectum runner section disposable integral molding and forming, and the manufacture method of this valve body.
Background technique
Plastic stop valve be at present in a lot of fields in have the fluid switch structure of extensive application.Valve body in plastic stop valve is generally through mold injection molding.Influent stream road in valve body, the valve seat going out runner and pass in and out with valve seat opening between runner are the necessary structures that stop valve realizes that convection cell carries out switch control rule.The structure of entry/exit runner in valve body, by the restriction of technique of loosing core in injection molding process, there is the new problem being different from conventional metals stop valve, one of subject matter is exactly how to make the fluid passage in plastics valve body can maintain enough channel cross-sections (namely sufficient latus rectum).At standard GB/T/T28494 and international standard ISO21787, also all relevant regulation is required to the latus rectum of plastic stop valve.In valve body of plastic cut-off valve, fluid entry/exit runner is all with upper and lower relative mode and valve seat opening in communication respectively, and the entry/exit runner position therefore connected in valve seat opening both sides has just become to affect " bottleneck " of flow channel cross-sections.Entry/exit runner due to plastics valve body is generally that the cavity formed by the technique of loosing core when molding and forming is formed, and cannot by adopting the mode of warp architecture passage to be solved as metal stop valve, existing many documents report the method solving and increase plastics valve body entry/exit runner problem respectively for this reason.
A kind of plastic stop valve disclosed in Chinese patent 01256569.5, employing be the axis of the using head piece axis (namely " low in and high out ") higher than influent stream mouth.Because the axis that goes out head piece violates common use habit higher than the axis of influent stream mouth, be difficult to by market is accepted.
A kind of plastic stop valve disclosed in Chinese patent 01257017.6, what adopt is that central angle sum right for the socket joint spacing preiection of the circular tube shaped runner lower half being arranged at thermofusible spigot formula influent stream mouth is less than 160 degree, and goes out being arranged at thermofusible spigot formula the mode that the right central angle sum of the socket joint spacing preiection of the circular tube shaped runner upper half of head piece is less than 160 degree.Its expansion for runner makes moderate progress, but the effect of this improvement is very little, can not reach the object of full-bore.
A kind of large discharge plastic stop valve disclosed in Chinese patent 200420032638.5, propose and the medial axis of influent stream passage tilted to valve port direction from top to bottom by influent stream mouth, the medial axis going out circulation road then by valve port to the scheme going out head piece direction and tilt from top to bottom.Though its advantage is can make moderate progress to the expansion of runner equally, this improvement is very little, can not reach full-bore.
A kind of direct through type plastic stop valve disclosed in Chinese patent 03234620.4, what adopt is at body base opening, and be fixedly connected with by the merging that matched by the peripheral side wall of back cover lid and the madial wall of the recessed opening portion of described body base, the mode of one " patch installing " can be referred to as.The advantage of the program is that to ensure the expansion of runner, but the problem thereupon brought is by increasing a chance of loosing core, and the quality that is fixedly connected with of being somebody's turn to do " patch " position can not be guaranteed, and is difficult to inspection discovery.
A kind of plastic stop valve disclosed in the document of Chinese Patent Application No. 200510060119.9 makes valve gap connection mouth and valve gap mutually bonding by the bonding plane that can cooperatively interact therebetween.Its advantage in a disguised form adds a tube bundle extracting machine meeting, thus the full-bore expanding and ensure runner can be realized, shortcoming is then: if valve gap is circular, then its sectional area is just too large, if but reduce its cross section and make valve gap adopt abnormity, bonding quality then not only and between valve gap connection mouth can not ensure, and the centering that flap and valve seat opening cooperatively interact also not easily ensures.
A kind of valve body of plastic cut-off valve disclosed in Chinese patent 200820140498.1, have employed equally and go out at valve body the core-drawing hole offering " patch installing " formula communicated with valve body outside bottom runner, finally by the closeouts be fixedly installed at this core-drawing hole, this core-drawing hole is blocked.Therefore its feature, equally also not easily ensures as cost with closeouts position " patch installing " quality, increases a chance of loosing core to ensure the size of runner.
Therefore, although be the sufficient latus rectum regulation meeting NBS and international standard, research and the test of attempting to expand in every way entry/exit runner latus rectum in plastic stop valve body are being carried out always, and constantly have new solution to propose and report, but this problem fails to obtain solution that is satisfied and essence all the time for a long time, so far the method that there is no meets simultaneously and has enough latus rectums and enough intensity required by NBS and international standard, and can meet the requirement of Consumer's use habit.As how economy, easily mode make valve body of plastic cut-off valve have enough section valve flowing channels, be still problem to be solved.
Summary of the invention
Given this, the present invention first proposed a kind of valve body of plastic cut-off valve that the problems referred to above can be made to obtain the satisfied integrated single injection-molded solved, and further provides the manufacture method of described valve body of plastic cut-off valve.
The valve body of plastic cut-off valve of molding and forming of the present invention, there is influent stream mouth equally, go out head piece, valve gap connection mouth and valve seat, valve seat has valve seat opening, have between influent stream mouth and valve seat opening and to loose core the influent stream road that the cavity that formed serves as from influent stream mouth by during molding and forming, have between valve seat and valve gap connection mouth and loose core the basis of body cavity that the cavity that formed serves as by during molding and forming from valve gap connection mouth, described body cavity and going out to have between head piece by during molding and forming from go out head piece loose core the cavity that formed and jointly serve as from the cavity that the madial wall side core-pulling that body cavity goes out head piece side is formed go out runner.
As can be seen from the updating plastic stop valve entry/exit runner comprising above-mentioned document, expand and ensure that the latus rectum in influent stream road is comparatively easy, and more existing mode of structure can be solved effectively, but owing to receiving many restrictions from going out loosing core of head piece direction, thus change and expand runner latus rectum then all the time existing problems and obstacle.The present invention is by using the body cavity had in valve body self structure, the madial wall going out head piece side by it dexterously reaches increase chance of loosing core in side core-pulling mode, thus without the need to " to window " on valve body and " patch installing " is this obviously can affect body strength, and certainly exist the mode of hidden danger of quality and risk, can not only realize expanding by formed cavity of being loosed core by increase the object runner latus rectum, and the described mode going out the madial wall side core-pulling of head piece side from body cavity can carry out regulation and control to the height of formed cavity and/or width, to meet the needs to going out the change of runner latus rectum size.Test shows, the present invention is above-mentioned expands the mode flow passage structure, for full-bore goes out runner, have affluence.
Expand under stating the prerequisite not affecting or reduce influent stream road on the invention on the basis runner latus rectum, combine with the measure in corresponding expansion influent stream road further, the object of fluid passage full-bore in plastic stop valve can be realized satisfactorily.The measure in expansion influent stream road mentioned here, can include but not limited to the mode having report in aforementioned documents.Such as, can have in conjunction with the mode of employing separately or arbitrarily:
Influent stream road below described valve seat can have lower dent;
The medial axis in described influent stream road can be to valve seat opening direction angled straight lines from top to bottom by influent stream mouth;
Described influent stream mouth is located along the same line with the longitudinal center line going out head piece, etc.
In the valve body of plastic cut-off valve of said structure of the present invention, described influent stream mouth and the concrete form going out head piece, need and purposes according to use, can have multiple choices, such as, it can be separately the hatch frame of thermofusible spigot formula, screw connected or flange join type.
Valve gap connection mouth described in valve body of plastic cut-off valve, uses according to difference and needs and purposes, equally also can be respectively thermofusible spigot formula, be the forms such as the hatch frame of threaded metal insert with flange plate or inner peripheral surface.
As above-mentioned, because the madial wall that present invention employs by going out head piece side reaches the object expanding runner latus rectum in side core-pulling mode, avoid and " to window " on valve body and " patch installing " can affect body strength and cause the hidden danger of quality problem that may exist, therefore, only with regard to expanding the object of fluid passage latus rectum, can realize making described valve body become the shaping structure of integral molded plastic completely.
On the basis of the molding and forming basic operational ways of current valve body of plastic cut-off valve, the basic manufacture process of the valve body of plastic cut-off valve of said structure of the present invention can comprise following steps:
In the process of molding and forming in a mold, loose core with the core in mould and form influent stream mouth and serve as influent stream road from the influent stream mouth cavity formed of loosing core;
With the core in mould loose core formed valve gap connection mouth and from valve gap connection mouth loose core formed cavity serve as body cavity;
Loose core with the core in mould and form out head piece and to loose core formation one cavity from going out head piece, by this cavity with form another cavity with the core in mould from the madial wall side core-pulling that body cavity goes out head piece side again and jointly serve as runner.
Be appreciated that thus, the valve body of plastic cut-off valve of said structure of the present invention, by adopting the mode of the madial wall side core-pulling going out head piece side from body cavity, achieve and do not affecting or sacrificing influent stream road, and without the need to destroy the shaping valve body structure of integral molded plastic prerequisite under, effectively expand out the latus rectum of runner, solve plastic stop valve realize country/international standard should to have about plastic stop valve enough latus rectums and valve body should have sufficient intensity etc. require in important technical obstacle, solve people thirst for solving always but fail the technical barrier that succeeds all the time, and meet the use habit of Consumer completely.
Below in conjunction with the drawings and specific embodiments, foregoing of the present invention is described in further detail again.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following example.Without departing from the idea case in the present invention described above, the various replacement made according to ordinary skill knowledge and customary means or change, all should comprise within the scope of the invention.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of the valve body of plastic cut-off valve of molding and forming in embodiment 1.
Fig. 2 is that the A of Fig. 1 is to structural representation.
Fig. 3 is the plan view of Fig. 1.
Fig. 4 is the form structure schematic diagram of the valve body of plastic cut-off valve of molding and forming in embodiment 1.
Fig. 5 is the plan view of Fig. 4.
Fig. 6 is the cross-sectional view of the valve body of plastic cut-off valve of molding and forming in embodiment 2.
Fig. 7 is that the A of Fig. 6 is to structural representation.
Fig. 8 is the plan view of Fig. 6.
Fig. 9 is the form structure schematic diagram of the valve body of plastic cut-off valve of molding and forming in embodiment 2.
Figure 10 is that the A of Fig. 9 is to structural representation.
Figure 11 is the plan view of Fig. 9.
Figure 12 be the valve body of plastic cut-off valve of molding and forming in embodiment 2 when molding and forming, after die sinking, the view of not yet loosing core, wherein includes valve body of plastic cut-off valve and injection mould template and injection mold core to be loosed core.
Figure 13 be the valve body of plastic cut-off valve of molding and forming in embodiment 2 when molding and forming, after die sinking, injection mould is loosed core view.
Figure 14 be the valve body of plastic cut-off valve of molding and forming in embodiment 2 together with inner side core-pulling from the view after injection mould takes off.
Figure 15 is the plan view of Figure 14.
Figure 16 is the inner side core-pulling side core-pulling view of the valve body of plastic cut-off valve of molding and forming in embodiment 2.
Figure 17 is the plan view of Figure 16.
Figure 18 is after the inner side core-pulling side core-pulling of the valve body of plastic cut-off valve of molding and forming in embodiment 2, view when being taken out from valve gap connection mouth by the core of inner side core-pulling.
Figure 19 is after the valve body of plastic cut-off valve of molding and forming in embodiment 2 has been loosed core, the structural representation of processing to be cut.
Figure 20 is that the valve seat opening of the valve body of plastic cut-off valve of molding and forming in embodiment 2 is by the structure after cutting and influent stream mouth and the external pipe joint structural representation by cutting aftershaping.
Figure 21 be the valve body of plastic cut-off valve of molding and forming in embodiment 3 when molding and forming, after die sinking, the view of not yet loosing core, wherein includes valve body of plastic cut-off valve and injection mould template and injection mold core to be loosed core.
Figure 22 be the valve body of plastic cut-off valve of molding and forming in embodiment 3 when molding and forming, after die sinking, injection mould is loosed core view, and wherein loosing core of influent stream road is loose core for twice.
Figure 23 is that the valve body of plastic cut-off valve of molding and forming in embodiment 3 is from the view after injection mould takes off, the core that wherein loose core in influent stream road second together takes off together with valve body of plastic cut-off valve, the core of inner side core-pulling together takes off together with valve body of plastic cut-off valve, and the core of inner side core-pulling is made up of jointly the first inner side core-pulling core, the second inner side core-pulling core and the 3rd inner side core-pulling core.
Figure 24 is the plan view of Figure 23.
Figure 25 is the core lifting status schematic diagram loosed core in the influent stream road of the valve body of plastic cut-off valve of molding and forming in embodiment 3.
Figure 26 is the view that the core loosed core in the influent stream road of the valve body of plastic cut-off valve of molding and forming in embodiment 3 detaches valve body of plastic cut-off valve.
Figure 27 is loosed core view in the influent stream road of the valve body of plastic cut-off valve of molding and forming in embodiment 3.
Figure 28 is that after in embodiment 3, influent stream road completes and looses core, the valve body of plastic cut-off valve of molding and forming not yet completes the structural representation of inner side core-pulling, and wherein this inner side core-pulling is made up of jointly the first inner side core-pulling, the second inner side core-pulling and the 3rd inner side core-pulling.
Figure 29 is the plan view of Figure 28.
Figure 30 is the first inner side core-pulling side core-pulling view in valve body of plastic cut-off valve three inner side core-pulling of molding and forming in embodiment 3.
Figure 31 is the plan view of Figure 30.
Figure 32 is after the first inner side core-pulling side core-pulling of the valve body of plastic cut-off valve of molding and forming in embodiment 3, view when being taken out from valve gap connection mouth by the core of the first inner side core-pulling.
Figure 33 is the plan view of Figure 32.
Figure 34 is after the first inner side core-pulling side core-pulling of the valve body of plastic cut-off valve of molding and forming in embodiment 3 completes, and comprises the second inner side core-pulling core to be loosed core and the structural representation of the 3rd inner side core-pulling core.
Figure 35 is the plan view of Figure 34.
Figure 36 is the core side core-pulling view of the second inner side core-pulling in valve body of plastic cut-off valve three inner side core-pulling of molding and forming in embodiment 3.
Figure 37 is the plan view of Figure 36.
Figure 38 is after the second inner side core-pulling side core-pulling of the valve body of plastic cut-off valve of molding and forming in embodiment 3, view when being taken out from valve gap connection mouth by the core of the second inner side core-pulling.
Figure 39 is the plan view of Figure 38.
Figure 40, after the second inner side core-pulling side core-pulling of the valve body of plastic cut-off valve of molding and forming in embodiment 3 completes, comprises the structural representation of the 3rd inner side core-pulling core to be loosed core.
Figure 41 is the plan view of Figure 40.
Figure 42 is the core side core-pulling view of the 3rd inner side core-pulling in valve body of plastic cut-off valve three inner side core-pulling of molding and forming in embodiment 3.
Figure 43 is the plan view of Figure 42.
Figure 44 is after the 3rd inner side core-pulling side core-pulling of the valve body of plastic cut-off valve of molding and forming in embodiment 3, view when being taken out from valve gap connection mouth by the core of the 3rd inner side core-pulling.
Figure 45 is the plan view of Figure 44.
Figure 46 is after having loosed core of the valve body of plastic cut-off valve of molding and forming in embodiment 3, the structural representation of processing to be cut.
Figure 47 is the plan view of Figure 46.
Figure 48 be the valve seat opening of the valve body of plastic cut-off valve of molding and forming in embodiment 3 shaping by cutting after structure and influent stream mouth and external pipe joint shaping by cutting after structural representation.
Figure 49 is the plan view of Figure 48.
Figure 50 is the structural representation of the valve body of plastic cut-off valve of molding and forming in embodiment 4.
Figure 51 is structure (amplification) schematic diagram of the plastics connection transition piece in embodiment 5 with valve gap connection inserting part.
Figure 52 is that in embodiment 5, not yet hot melt adhesion has the structural representation of the valve body of plastic cut-off valve of the plastics connection transition piece of valve gap connection inserting part.
Figure 53 is the structural representation of the valve body of plastic cut-off valve of molding and forming in embodiment 5.
Figure 54 is the structural representation of the valve body of plastic cut-off valve of embodiment 6 molding and forming.
Figure 55 is the plan view of Figure 54.
Embodiment
Embodiment 1
As shown in Fig. 1 ~ Fig. 5, the valve body of plastic cut-off valve 1 of molding and forming described in the present embodiment is integral molded plastic shaping structure, there is influent stream mouth 2, go out head piece 3, valve gap connection mouth 4 and valve seat 5, valve seat 5 has valve seat opening 6, have between influent stream mouth 2 and valve seat opening 6 and to loose core the influent stream road 7 that the cavity that formed serves as from influent stream mouth 2 by during molding and forming, have between valve seat 5 and valve gap connection mouth 4 and to loose core the body cavity 8 that the cavity that formed serves as from valve gap connection mouth 4 by during molding and forming, it is characterized in that described body cavity 8 and go out to have between head piece 3 by during molding and forming from go out head piece 3 loose core the cavity 9 that formed and jointly serve as from the cavity 10 that the madial wall side core-pulling that body cavity 8 goes out head piece side is formed go out runner 11.Influent stream mouth 2, go out the hatch frame that head piece 3 and valve gap connection mouth 4 are all thermofusible spigot formula respectively.Influent stream mouth 2 is located along the same line with the longitudinal center line going out head piece 3.
Embodiment 2
As shown in Fig. 6 ~ Figure 11, the valve body of plastic cut-off valve that in the present embodiment, integral molded plastic is shaping is similar to embodiment 1, difference is that the influent stream road in the present embodiment below valve seat has lower dent 16, and the medial axis in influent stream road is the straight line from top to bottom tilted to valve seat opening direction by influent stream mouth.
As shown in Figure 12 ~ 20, the valve body of plastic cut-off valve 1 of the present embodiment when molding and forming, after die sinking, injection mould loose core 12 and loose core 13 and loose core 14 detach valve body of plastic cut-off valve 1 after, inner side core-pulling 15 is still retained in valve body of plastic cut-off valve 1.At this moment, need the valve body of plastic cut-off valve 1 of molding and forming to take out from injection mould together with inner side core-pulling 15.Then, by inner side core-pulling 15 side core-pulling, allow inner side core-pulling 15 be arranged in body cavity 8 completely, then the valve gap connection mouth 4 of inner side core-pulling 15 from body cavity 8 top is taken out.After completing above-mentioned action, described valve body of plastic cut-off valve 1 does not also have valve seat opening 6, by further cutting by valve seat opening 6 machine shaping; And influent stream mouth 2 is not yet shaping with external pipe joint, by further cutting by influent stream mouth 2 and the machine shaping of external pipe joint.The valve body of plastic cut-off valve 1 of final formation the present embodiment.
Embodiment 3
As shown in Figure 21 ~ Figure 49, the valve body of plastic cut-off valve of molding and forming described in the present embodiment is similar to embodiment 1, difference is that the influent stream road in the present embodiment below valve seat has lower dent 16, influent stream road by twice formation of loosing core, namely by influent stream road first loose core 17 and influent stream road second loose core 18 loose core respectively formed influent stream road.Madial wall side core-pulling in the present embodiment has been loosed core by three times, namely have been loosed core respectively madial wall side core-pulling by the first inner side core-pulling 19, second inner side core-pulling 20 and the 3rd inner side core-pulling 21.
The valve body of plastic cut-off valve 1 of molding and forming described in the present embodiment is when molding and forming, injection mould loose core 13 and loose core 14 and influent stream road first loose core 17 detach valve body of plastic cut-off valve 1 after, loose core the 18, first inner side core-pulling 19, second inner side core-pulling 20 and the 3rd inner side core-pulling 21 of influent stream road second is still retained in valve body of plastic cut-off valve 1.At this moment, need the valve body of plastic cut-off valve 1 of molding and forming to take out from the injection mould injection machine together with loose core the 18, first inner side core-pulling 19, second inner side core-pulling 20 and the 3rd inner side core-pulling 21 of influent stream road second.
Then, then 18 lower dents 16 had from influent stream road of being loosed core in influent stream road second lift, and use first and to loose core the cavity that 17 extractions are formed afterwards, and loosing core second from influent stream mouth 18 detaches valve body of plastic cut-off valve 1.
In addition, the madial wall side core-pulling completed for three times is divided to be: first by the first inner side core-pulling 19 side core-pulling, and to allow the first inner side core-pulling 19 be arranged in body cavity 8 completely, then taken out by the valve gap connection mouth 4 of the first inner side core-pulling 19 from body cavity 8 top; Then by the second inner side core-pulling 20 side core-pulling, allow the second inner side core-pulling 20 be arranged in body cavity 8 completely, then the valve gap connection mouth 4 of the second inner side core-pulling 20 from body cavity 8 top is taken out; Finally by the 3rd inner side core-pulling 21 side core-pulling, allow the 3rd inner side core-pulling 21 be arranged in body cavity 8 completely, then the valve gap connection mouth 4 of the 3rd inner side core-pulling 21 from body cavity 8 top is taken out.
After completing above-mentioned loosing core, described valve body of plastic cut-off valve 1 does not also have valve seat opening 6, by further cutting by valve seat opening 6 machine shaping; And influent stream mouth 2 is not yet shaping with external pipe joint, by further cutting by influent stream mouth 2 and the machine shaping of external pipe joint, the final valve body of plastic cut-off valve 1 forming the present embodiment.
Embodiment 4
As shown in figure 50, the valve body of plastic cut-off valve of molding and forming described in the present embodiment is similar to embodiment 2, and difference is that valve gap connection mouth 4 place at body cavity 8 top in the present embodiment is fixedly installed valve gap connection inserting part 22.Described valve gap connection inserting part 22 is manufactured by brass and endoporus has the internal thread be connected with valve gap.This valve gap connection inserting part 22 be the valve body of plastic cut-off valve 1 of molding and forming when molding and forming, be embedded in injection mould, when completing injection moulding and after loosing core, valve gap connection inserting part 22 has just been fixed on valve gap connection mouth 4 place at body cavity 8 top.
Embodiment 5
As shown in Figure 51 ~ Figure 53, the valve body of plastic cut-off valve of molding and forming described in the present embodiment is similar to embodiment 4, difference is that in the present embodiment, body cavity 8 top has valve gap transition connection mouth 23, and described valve gap transition connection mouth 23 is connected transition piece 24 hot melt adhesion and is integrated with the plastics with valve gap connection inserting part 22.
Embodiment 6
As shown in Figure 54 ~ Figure 55, the valve body of plastic cut-off valve of molding and forming described in the present embodiment is similar to embodiment 3, the hatch frame of difference to be the valve gap connection mouth 4 at body cavity 8 top in the present embodiment be flange join type.
Claims (8)
1. the valve body of plastic cut-off valve of molding and forming, there is influent stream mouth, go out head piece, valve gap connection mouth and valve seat, valve seat has valve seat opening, have between influent stream mouth and valve seat opening and to loose core the influent stream road that the cavity that formed serves as from influent stream mouth by during molding and forming, have between valve seat and valve gap connection mouth and to loose core the body cavity that the cavity that formed serves as from valve gap connection mouth by during molding and forming, it is characterized in that described body cavity and go out to have between head piece by during molding and forming from go out head piece loose core the cavity that formed and jointly serve as from the cavity that the madial wall side core-pulling that body cavity goes out head piece side is formed go out runner.
2. valve body of plastic cut-off valve as claimed in claim 1, is characterized in that the influent stream road below described valve seat has lower dent.
3. valve body of plastic cut-off valve as claimed in claim 1, is characterized in that the medial axis in described influent stream road is to valve seat opening direction angled straight lines from top to bottom by influent stream mouth.
4. valve body of plastic cut-off valve as claimed in claim 1, is characterized in that described influent stream mouth is located along the same line with the longitudinal center line going out head piece.
5. valve body of plastic cut-off valve as claimed in claim 1, it is characterized in that described influent stream mouth and going out head piece to be separately the hatch frame of thermofusible spigot formula, screw connected or flange join type.
6. valve body of plastic cut-off valve as claimed in claim 1, is characterized in that described valve gap connection mouth is thermofusible spigot formula, is the hatch frame of threaded metal insert with flange plate or inner peripheral surface.
7. the valve body of plastic cut-off valve as described in one of claim 1 to 6, is characterized in that described valve body is integral molded plastic shaping structure.
8. the manufacture method of the valve body of plastic cut-off valve of the described molding and forming of one of claim 1 to 7, comprise following steps: in the process of described valve body of plastic cut-off valve molding and forming in a mold, loosing core with the core (12) in mould forms influent stream mouth and serves as influent stream road from the influent stream mouth cavity formed of loosing core; With the core (13) in mould loose core formed valve gap connection mouth and from valve gap connection mouth loose core formed cavity serve as body cavity; It is characterized in that with the core (14) in mould loose core form out head piece and from go out head piece loose core formed cavity (9); Form another cavity (10) with the madial wall side core-pulling that the core (15) in mould goes out head piece side from body cavity, core (15) leaves valve body of plastic cut-off valve by body cavity and valve gap connection mouth afterwards; Described cavity (9) and another cavity (10) serve as runner jointly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510622249.0A CN105422947B (en) | 2014-09-29 | 2015-09-28 | The valve body of plastic cut-off valve and manufacturing method of injection molding |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410509081.8 | 2014-09-29 | ||
| CN201410509081.8A CN104235461A (en) | 2014-09-29 | 2014-09-29 | Injection molded plastic stop valve body |
| CN201510622249.0A CN105422947B (en) | 2014-09-29 | 2015-09-28 | The valve body of plastic cut-off valve and manufacturing method of injection molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105422947A true CN105422947A (en) | 2016-03-23 |
| CN105422947B CN105422947B (en) | 2018-07-13 |
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Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410509081.8A Withdrawn CN104235461A (en) | 2014-09-29 | 2014-09-29 | Injection molded plastic stop valve body |
| CN201520753081.2U Withdrawn - After Issue CN205190881U (en) | 2014-09-29 | 2015-09-28 | Injection molded plastic stop valve body |
| CN201510622249.0A Active CN105422947B (en) | 2014-09-29 | 2015-09-28 | The valve body of plastic cut-off valve and manufacturing method of injection molding |
| CN201510622278.7A Active CN105422948B (en) | 2014-09-29 | 2015-09-28 | The valve body of plastic cut-off valve of injection molding |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410509081.8A Withdrawn CN104235461A (en) | 2014-09-29 | 2014-09-29 | Injection molded plastic stop valve body |
| CN201520753081.2U Withdrawn - After Issue CN205190881U (en) | 2014-09-29 | 2015-09-28 | Injection molded plastic stop valve body |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510622278.7A Active CN105422948B (en) | 2014-09-29 | 2015-09-28 | The valve body of plastic cut-off valve of injection molding |
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| Country | Link |
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| CN (4) | CN104235461A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422948A (en) * | 2014-09-29 | 2016-03-23 | 罗荣森 | Injection-molded plastic stop valve body |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4185807A (en) * | 1978-03-20 | 1980-01-29 | Fluoroware, Inc. | Plastic valve |
| CN2680939Y (en) * | 2004-01-19 | 2005-02-23 | 蔡志利 | Plastic stop valve for big flow |
| CN201173296Y (en) * | 2008-01-30 | 2008-12-31 | 魏贻锟 | Fluxoid plastic stop valve |
| CN201739516U (en) * | 2009-11-30 | 2011-02-09 | 黄银田 | Plastic pipeline stop valve |
| CN202220895U (en) * | 2011-09-26 | 2012-05-16 | 刘红 | Through type stop valve |
| CN105422948A (en) * | 2014-09-29 | 2016-03-23 | 罗荣森 | Injection-molded plastic stop valve body |
-
2014
- 2014-09-29 CN CN201410509081.8A patent/CN104235461A/en not_active Withdrawn
-
2015
- 2015-09-28 CN CN201520753081.2U patent/CN205190881U/en not_active Withdrawn - After Issue
- 2015-09-28 CN CN201510622249.0A patent/CN105422947B/en active Active
- 2015-09-28 CN CN201510622278.7A patent/CN105422948B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4185807A (en) * | 1978-03-20 | 1980-01-29 | Fluoroware, Inc. | Plastic valve |
| CN2680939Y (en) * | 2004-01-19 | 2005-02-23 | 蔡志利 | Plastic stop valve for big flow |
| CN201173296Y (en) * | 2008-01-30 | 2008-12-31 | 魏贻锟 | Fluxoid plastic stop valve |
| CN201739516U (en) * | 2009-11-30 | 2011-02-09 | 黄银田 | Plastic pipeline stop valve |
| CN202220895U (en) * | 2011-09-26 | 2012-05-16 | 刘红 | Through type stop valve |
| CN105422948A (en) * | 2014-09-29 | 2016-03-23 | 罗荣森 | Injection-molded plastic stop valve body |
| CN205190881U (en) * | 2014-09-29 | 2016-04-27 | 罗荣森 | Injection molded plastic stop valve body |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422948A (en) * | 2014-09-29 | 2016-03-23 | 罗荣森 | Injection-molded plastic stop valve body |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105422948B (en) | 2018-07-13 |
| CN205190881U (en) | 2016-04-27 |
| CN104235461A (en) | 2014-12-24 |
| CN105422948A (en) | 2016-03-23 |
| CN105422947B (en) | 2018-07-13 |
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