CN113137502A - Check valve and method for producing a check valve - Google Patents
Check valve and method for producing a check valve Download PDFInfo
- Publication number
- CN113137502A CN113137502A CN202110054030.0A CN202110054030A CN113137502A CN 113137502 A CN113137502 A CN 113137502A CN 202110054030 A CN202110054030 A CN 202110054030A CN 113137502 A CN113137502 A CN 113137502A
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- China
- Prior art keywords
- housing part
- valve
- housing
- check valve
- envelope
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000001746 injection moulding Methods 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 25
- 239000012815 thermoplastic material Substances 0.000 claims description 6
- 229920001169 thermoplastic Polymers 0.000 claims description 5
- 239000004416 thermosoftening plastic Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 238000005538 encapsulation Methods 0.000 abstract description 3
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 230000004308 accommodation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
Classifications
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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
- F16K15/00—Check valves
- F16K15/14—Check valves with flexible valve members
- F16K15/148—Check valves with flexible valve members the closure elements being fixed in their centre
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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
- F16K15/00—Check valves
- F16K15/14—Check valves with flexible valve members
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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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14467—Joining articles or parts of a single article
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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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1615—The materials being injected at different moulding stations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/04—Arrangements of piping, valves in the piping, e.g. cut-off valves, couplings or air hoses
Abstract
The present application relates to check valves and methods for manufacturing check valves. The invention relates to a check valve (2, 102, 202) comprising: a valve housing having a first housing part (4, 104, 204) and a second housing part (6, 106, 206), wherein the first and second housing parts at least partially abut each other and/or at least partially overlap in a connecting region (16, 116, 216); a valve element (8, 108, 208), in particular a flexible valve diaphragm, for opening and closing the non-return valve, which valve element is arranged within the valve housing, in particular on a valve seat (10, 110, 210) formed by the first housing part; an encapsulation (22, 122, 222) produced by means of injection molding surrounds the connecting region such that the first housing part and the second housing part are connected to one another in a pressure-tight manner. The invention further relates to a method for producing a non-return valve comprising an envelope by means of injection molding.
Description
The invention relates to a check valve and a method for manufacturing the check valve.
Check valves are used in particular in motor vehicles and are installed in motor vehicles, for example, on brake boosters, on which they are installed between a vacuum accumulator (unterrucksiecher) and a vacuum source. The check valve prevents a back flow of fluid, in particular air, from the vacuum source into the vacuum accumulator, so that even if the vacuum source is switched off, the vacuum is maintained and the braking force support is ensured. Such check valves are also used for ventilating and venting the crankcase.
The check valve generally comprises a valve housing having a first housing part and a second housing part, and a valve element, in particular a flexible valve diaphragm, for opening and closing the check valve, which valve element is arranged within the valve housing. Due to the two-part construction of the valve housing, a connection point exists between the first housing part and the second housing part, which connection point has to be connected in a pressure-tight manner in order to ensure a perfect function of the check valve. This has hitherto been achieved by joining the housing parts after assembly of the check valve by means of ultrasonic welding, spin welding, laser welding or induction welding. However, these methods are often messy and/or costly, particularly due to the investment costs for welding equipment and the extended cycle duration of manufacturing check valves. Furthermore, transporting the check valve between the individual manufacturing steps and the subsequent testing of the functional capability of the check valve requires an additional expenditure of time.
The object of the present invention is therefore to provide a check valve and a method for producing a check valve, in which the housing parts are connected in a pressure-tight manner with reduced effort and reduced costs.
The first object is achieved by a non-return valve having the features according to claim 1. The check valve according to the invention comprises a valve housing having a first housing part and a second housing part, wherein the first housing part and the second housing part at least partially abut one another and/or at least partially overlap in a connecting region. Furthermore, the check valve comprises a valve element, in particular a flexible valve diaphragm, for opening and closing the check valve, which valve element is arranged in the valve housing, in particular on a valve seat formed by the first housing part. The non-return valve further comprises an enveloping part (Umh humpng) produced by means of injection molding, which encloses the connecting region in such a way that the first housing part and the second housing part are connected to one another in a pressure-tight manner.
The expression "adjacent to one another" is to be understood to mean that the first housing part and the second housing part each have one or more contact surfaces, in particular annular contact surfaces, which contact one another in the assembled state of the check valve. The term "connection region" is to be understood as a region which extends in the circumferential direction and in the longitudinal direction of the check valve, in which connection region the first housing part and the second housing part abut against one another at one or more contact surfaces, i.e. contact one another, and which is surrounded by the envelope.
The idea of the invention is therefore: the housing parts of the valve housing are connected in a pressure-tight manner by means of the closure. The enclosing member encloses the one or more contact surfaces of the housing parts formed between them, so that the interior space of the valve housing is sealed from the surroundings to prevent air from leaking out of the interior space via the one or more contact surfaces between the housing parts.
The envelope is manufactured by means of injection molding. For this purpose, the connecting region is injection-coated with an injection-moldable material, so that the envelope surrounds the connecting region and establishes a pressure-tight connection. Thereby, costly and expensive welding methods can be avoided.
Preferably, the first housing part and/or the second housing part are also housing parts produced by means of injection molding. In particular, the first housing part and/or the second housing part and/or the envelope are formed from a plastic material, in particular from a thermoplastic material. Thereby, a chemical bond is achieved at the interfaces between the first housing part and the enclosure and between the second housing part and the enclosure. Preferably, the two housing parts and the enclosing member are manufactured in an injection molding machine having two or more injection units, but only one mold clamping unit (known as multicomponent injection molding). In this case, the first housing part and the second housing part are preferably produced simultaneously in a first working step, and the envelope is produced in a further working step.
In a preferred embodiment, in the connecting region, the first housing part and the second housing part form an accommodating space between them, which is spaced apart from the interior space of the valve housing. In particular, the spacing from the interior space is achieved by the first housing part or the second housing part itself. Thus, a receiving space is formed, for example, between the overlapping end sections of the first housing part and the second housing part. Preferably, the receiving space is also adjacent to one or more contact faces of the first and second housing parts. The receiving space serves to receive possible excess material of the envelope during injection molding, in order to prevent it from entering into the interior space of the valve housing. Hereby, a perfect valve function performed by the valve element arranged in the inner space is ensured.
Preferably, the receiving space is annular, i.e. extends in the circumferential direction of the check valve. Thereby, it is ensured that the surplus material in the entire circumferential direction can be accommodated and distributed evenly in the accommodation space.
According to an advantageous further development, the first housing part and/or the second housing part have at least one projection and/or at least one recess in the connecting region, which projection projects outward in the radial direction. In this way, for example, the contact surfaces between the first housing part and the second housing part and between the first housing part and the enclosing member and between the second housing part and the enclosing member are increased, so that a pressure-tight connection is improved. In addition to the chemical bond at the interface, a mechanical, positive connection between the first housing part and the enclosure and between the second housing part and the enclosure is also thereby achieved.
In particular, the at least one projection and/or the at least one recess are configured in an annular manner, i.e. in turn extend in the circumferential direction of the check valve.
Furthermore, it is preferred that the at least one projection is arranged on the front end section and/or the rear end section of the connection region. Thereby, during injection coating, the first housing half and the second housing half are held in place in the axial direction by means of the envelope.
The second object mentioned is achieved by a method for producing a non-return valve having the features according to claim 9, in particular a non-return valve having one or more of the features mentioned above.
In a method according to the invention for manufacturing a check valve by means of injection molding, i.e. in an injection molding machine, the check valve comprising a valve housing having a first housing part and a second housing part, and the check valve comprising a valve element, in particular a flexible valve diaphragm, arranged within the valve housing for opening and closing the check valve, the method comprises the steps of:
first, a material for the first housing part is plasticized and injected into a first mold for manufacturing the first housing part of the check valve, and a material for the second housing part is plasticized and injected into a second mold for manufacturing the second housing part of the check valve (step a)).
Subsequently, the check valve is assembled such that the first housing part and the second housing part at least partially abut each other and/or at least partially overlap at one or more contact surfaces in the connection region, in particular forming a receiving space (step b)). For this purpose, the valve element is first arranged on a valve seat, which is formed in particular by the first housing part, and the first housing part and the second housing part are subsequently assembled. The preassembly of the valve element on the valve seat is achieved in particular by means of an automatic assembly unit in the injection molding machine. Subsequently, the first housing part and the second housing part are brought into their final position, in which they at least partially abut each other or at least partially overlap at one or more contact surfaces.
In a further step (step c)), the material for the envelope is plasticized for forming a pressure-tight envelope of the connecting region and the connecting region is injection-coated with the material, so that the first housing part and the second housing part are connected to one another in a pressure-tight manner.
In principle, the first housing part and the second housing part can be produced in succession in time, i.e. with a time gap between the production of the first housing part and the production of the second housing part. In an advantageous embodiment, the first housing part and the second housing part are manufactured simultaneously, i.e. in one working step, in particular in one injection molding machine with a plurality of injection units and one mold clamping unit.
The production of the envelope of the non-return valve is carried out in a further working step, wherein in particular the first and/or the second housing part of the further non-return valve are or can be produced simultaneously during the production of the envelope of the non-return valve.
In order to reduce the time costs and to reduce the transport path, in a preferred embodiment, the check valve is functionally tested in a further step (step d)) after the formation of the envelope. This is preferably achieved in an injection molding machine. Here, for example, the valve housing and the valve itself are tested for tightness, the opening and closing pressure of the valve or their flow resistance.
In particular, a material containing a thermoplastic is used as the material for the first housing part, the second housing part and/or the enclosing part.
Drawings
Further features and advantages of the check valve according to the invention and of the method according to the invention are further elucidated hereinafter on the basis of the description of an embodiment and with reference to the accompanying schematic drawings. In the drawings:
figure 1 shows in perspective view a non-return valve according to a first and a second embodiment,
figure 2 shows the non-return valve of figure 1 in a top view,
figure 3A shows a cross-sectional view of the check valve according to the first embodiment of figures 1 and 2,
figure 3B shows a detail view a of the check valve of figure 3A,
figure 4A shows a cross-sectional view of the check valve according to the second embodiment of figures 1 and 2,
figure 4B shows a detail view B of the check valve of figure 4A,
figure 5 shows a non-return valve according to a third embodiment in a perspective view,
figure 6 shows the non-return valve of figure 5 in a top view,
figure 7A shows a cross-sectional view of the check valve according to the third embodiment of figures 5 and 6,
fig. 7B shows a detail view C of the check valve of fig. 7A.
Fig. 1 and 2 show different illustrations of a non-return valve 2, 102 according to a first and a second embodiment, respectively. The check valve 2, 102 comprises a two-part valve housing having a first housing part 4, 104 and a second housing part 6, 106. The first housing part 4, 104 and the second housing part 6, 106 are each formed from a thermoplastic material and are manufactured by means of injection molding.
The first housing part 4, 104 forms a first connection and the second housing part 6, 106 forms a second connection in order to integrate the non-return valve 2, 102 into a fluid-conducting line, in this case air (indicated by the arrow F drawn in the flow direction), for example into a brake booster of a motor vehicle.
The check valve 2, 102 comprises a valve element 8, 108, here a flexible disc valve diaphragm, arranged within a valve housing for opening and closing the check valve 2, 102. As can be seen in fig. 3A and 4A, the valve element 8, 108 is arranged on a valve seat 10, 110, which is formed by the first housing part 4, 104 or is constructed integrally therewith. The valve seat 10, 110 has a retaining device, here in the form of a projection 12, 112 extending in the flow direction F of the check valve 2, 102, in order to retain the valve element 8, 108 in both the open position and the closed position, wherein the projection 12, 112 engages into a through opening of the valve element 8, 108. Furthermore, the valve element 8, 108 is fixed between the first housing component 4, 104 and the second housing component 6, 106.
The valve seat 10, 110 has passage openings 14, 114 for opening and closing the check valve 2, 102, which extend in the flow direction F and are configured, for example, in a circular or oval cross section. In the open position, the valve element 8, 108 is at least partially lifted from the passage opening 14, 114, so that fluid can flow from the interior of the first housing part 4, 104 into the interior of the second housing part 6, 106 via the passage opening 14, 114 in the flow direction. In the closed position, the valve element 8, 108 closes the passage opening 14, 114, thereby preventing fluid flow opposite to the flow direction F.
Furthermore, the check valve 2, 102 has an encapsulation 22, 122 made of thermoplastic material and produced by means of injection molding, which ensures a pressure-tight connection of the first housing part 4, 104 to the second housing part 6, 106. To this end, the enclosing member 22, 122 encloses a connecting region 16, 116 in which the end section 18, 118 of the first housing part 4, 104 and the end section 20, 120 of the second housing part 6, 106 adjoin one another at a contact surface, and the end section 18, 118 of the first housing part 4, 104 and the end section 20, 120 of the second housing part 6, 106 partially overlap (see fig. 3A, 4A). Here, an annular contact surface is formed between the end face of the annular projection 24, 124 of the first housing part 4, 104 which projects outward in the radial direction and the end face of the annular projection 26, 126 of the second housing part 6, 106 which projects outward in the radial direction.
As can be seen in particular in the detail views of fig. 3B and 4B, in the connecting region 16, 116, the first housing part 4, 104 and the second housing part 6, 106 form a receiving space 28, 128 configured in an annular shape between them in order to receive excess material of the envelope 22, 122 during the production thereof by means of injection molding. The receiving space 28, 128 is spaced apart from the interior of the valve housing, in this case by an annular projection 30, 130, respectively, which projects at the end section 20, 120 of the second housing part 6, 106 and which extends in the circumferential direction, which annular projection in turn adjoins the end section 18, 118 of the first housing part 4, 104. Furthermore, the receiving space 28, 128 adjoins the contact surface of the first housing part 4, 104 and the second housing part 6, 106, through which material can enter the receiving space 28, 128.
The embodiment shown in fig. 3A, 3B and the embodiment shown in fig. 4A, 4B differ only in the shape of these protrusions 30, 130. According to the first embodiment, the projection 30 extends from the inside of the end section 20 of the second housing part 6 in the longitudinal direction of the check valve or opposite to the flow direction F and extends in the radial direction and annularly in the circumferential direction. According to the second embodiment, the projection 130 extends from the end face of the end section 120 of the second housing part 106 only in the longitudinal direction of the check valve or extends parallel to the longitudinal direction of the check valve and annularly in the circumferential direction. Thus, undercuts (Hinterschnitt) and thus possible parting lines (Trenngrat) are avoided.
In addition to the projections 24, 124, 26, 126 forming the contact surfaces between the housing parts 4, 104, 6, 106, the first housing part 4, 104 has further projections 32, 132 in the connecting region 16, 116 which project outward in the radial direction, and the second housing part 6, 106 has further projections 34, 134 in the connecting region 16, 116 which project outward in the radial direction. The projections 32, 132, 34, 134 are formed on the front end section or the rear end section of the connection region 16, 116, respectively, and have a larger dimension in the radial direction than the projections 24, 26. Furthermore, the first housing part 4, 104 has a recess 36, 136 and the second housing part 6, 106 has a recess 38, 138, which is formed between the projections 24, 32, 124, 132 or 26, 34, 126, 134, respectively. The projections 24, 32, 124, 132, 26, 34, 126, 134 and the recesses 36, 136, 38, 138 are in turn configured in an annular shape and extend in the circumferential direction around the check valve 2, 102.
In fig. 5, 6, 7A and 7B, a check valve 202 according to a third embodiment is shown. The check valve 202 comprises a two-part valve housing having a first housing part 204 and a second housing part 206, wherein the first housing part 204 and the second housing part 206 are both made of a thermoplastic material and are produced by means of injection molding.
The first housing part 204 forms a first interface and the second housing part 206 forms a second interface for integrating the check valve 202 into a fluid-conducting line system, in this case air (indicated by the arrow F drawn in the flow direction), for example into a brake booster of a motor vehicle.
The check valve 202 includes a valve element 208, here a flexible disk-shaped valve diaphragm, disposed within the valve housing for opening and closing the check valve 202. The valve element 208 is disposed on a valve seat 210 formed by the first housing component 204. The valve seat 210 in turn has a projection 212 in the form of a pin, which extends in the flow direction F of the check valve 202 and which acts as a retaining device in both the open position and the closed position, which projection engages into the through-opening of the valve element 208. Furthermore, a valve element 208 is also fixed between the first housing component 204 and the second housing component 206.
By at least partially lifting the valve element 208 from the valve seat 210, so that fluid can flow in the flow direction F from the interior of the first housing part 204 into the interior of the second housing part 206 via the passage opening 214, the passage opening 214 arranged in the valve seat 210 is opened for opening the check valve 202. In the closed position, valve element 208 closes passage opening 214, thereby preventing fluid flow opposite flow direction F.
Furthermore, the check valve 202 has an encapsulation 222 made of thermoplastic material and produced by means of injection molding, which ensures a pressure-tight connection of the first housing part 204 to the second housing part 206. To this end, the enclosure 222 encloses a connection region 216 in which the end section 218 of the first housing part 204 and the end section 220 of the second housing part 206 abut one another at a plurality of contact surfaces and the end section 218 of the first housing part 204 and the end section 220 of the second housing part 206 partially overlap. Here, the contact surfaces are formed between the end face of the first housing part 204 and the end face of the second housing part 206, and between the inside of the first housing part 204 and the outside of a projection 230 which projects in the longitudinal direction of the check valve 202 from an end section 220 of the second housing part 206 and extends annularly in the circumferential direction.
In the connecting region 216, the first housing part 204 and the second housing part 206 form a receiving space 228 configured in the form of a ring between them in order to receive excess material of the enclosure 222 during its production by means of injection molding. The receiving space 228 is spaced from the interior space of the valve housing, here by the protrusion 230 of the second housing part 206. Furthermore, the receiving space 228 is adjacent to the contact surface of the first housing part 204 and the second housing part 206, through which material can enter the receiving space 228.
Furthermore, the first housing part 204 has a projection 232 projecting outward in the radial direction in the connecting region 216, and the second housing part 206 has a projection 234 projecting outward in the radial direction in the connecting region 216, which is formed on the front end section or the rear end section of the connecting region 216. Within the connecting region 216, further projections 224 of the first housing part 204 and further projections 226 of the second housing part 206 are formed, which are flanked by recesses 236, 238 of the first and second housing parts 204, 206. The projections 224, 226 have smaller dimensions in both the longitudinal direction and the radial direction than the projections according to the first and second embodiment, whereby the projections 224, 226 can be melted more easily during injection cladding, which improves the connection between the two housing parts 204, 206 and the envelope 222.
The check valves 2, 102, 202 are each produced by means of injection molding. For this purpose, the material for the first housing part 4, 104, 204 (here a thermoplastic) is first plasticized and injected under pressure into a first mold or first injection molding tool of the injection molding machine (step a)).
At the same time, the material for the second housing part 6, 106, 206 (here a thermoplastic) is plasticized and injected under pressure into the second mold or second injection molding tool of the injection molding machine (step a)).
Subsequently, the non-return valve 2, 102, 202 is assembled in the injection molding machine (step b)), wherein the valve element 8, 108, 208 is first arranged on the valve seat 10, 110, 210 formed by the first housing part 4, 104, 204 by means of the automatic assembly unit. Subsequently, the first housing part 4, 104, 204 and the second housing part 6, 106, 206 are arranged such that they at least partially abut one another in the connecting region 16, 116, 216 at one or more contact surfaces and their end sections 18, 118, 218, 20, 120, 220 at least partially overlap.
In a further step (step c)), the material for the envelope (likewise a thermoplastic) is plasticized and the connecting region is injection-molded in an injection molding machine under pressure. For this purpose, in particular a mold or an injection molding tool is used which produces the cylindrical outer contour of the envelope. After cooling of the enclosure, the first housing part 4, 104, 204 and the second housing part 6, 106, 206 are connected to one another in a pressure-tight manner.
To verify the sealing and other functions of the valve, the check valve 2, 102, 202 is still functionally tested in the injection molding machine after assembly.
Reference mark
2. 102, 202 check valve
4. 104, 204 first housing part
6. 106, 206 second housing part
8. 108, 208 valve element
10. 110, 210 valve seat
12. 112, 212 projection
14. 114, 214 passage opening
16. 116, 216 connection region
18. 118, 218 end section of the first housing part
20. 120, 220 end section of the second housing part
22. 122, 222 enclosure
24. 124, 224 protrusions
26. 126, 226 projection
28. 128, 228 accommodation space
30. 130, 230 protrusion
32. 132, 232 projections
34. 134, 234 protrusions
36. 136, 236 recess
38. 138, 238 recess.
Claims (12)
1. A check valve (2, 102, 202) comprising:
a valve housing having a first housing part (4, 104, 204) and a second housing part (6, 106, 206), wherein the first housing part (4, 104, 204) and the second housing part (6, 106, 206) at least partially abut one another and/or at least partially overlap in a connecting region (16, 116, 216),
a valve element (8, 108, 208), in particular a flexible valve diaphragm, for opening and closing the non-return valve (2, 102, 202), which is arranged within the valve housing, in particular on a valve seat (10, 110, 210) formed by the first housing part (4, 104, 204),
-an envelope (22, 122, 222) produced by means of injection molding, which surrounds the connecting region (16, 116, 216), such that the first housing part (4, 104, 204) and the second housing part (6, 106, 206) are connected to one another in a pressure-tight manner.
2. Non-return valve (2, 102, 202) according to claim 1, wherein the first housing part (4, 104, 204) and/or the second housing part (6, 106, 206) and/or the envelope (22, 122, 222) are formed from a plastic material, in particular from a thermoplastic material.
3. Non-return valve (2, 102, 202) according to one of claims 1 or 2, wherein in the connection region (16, 116, 216) the first housing part (4, 104, 204) and the second housing part (6, 106, 206) form a receiving space (28, 128, 228) between them, which is spaced apart from an interior space of the valve housing, in particular by the first housing part (4, 104, 204) or the second housing part (6, 106, 206).
4. The check valve (2, 102, 202) of claim 3, wherein the receiving space (28, 128, 228) is adjacent to one or more contact faces of the first housing component (4, 104, 204) and the second housing component (6, 106, 206).
5. A non-return valve (2, 102, 202) according to one of claims 3 or 4, wherein the receiving space (28, 128, 228) is configured annular.
6. Check valve (2, 102, 202) according to one of the preceding claims, wherein the first housing part (4, 104, 204) and/or the second housing part (6, 106, 206) has at least one projection (24, 124, 224, 26, 126, 226, 32, 132, 232, 34, 134, 234) and/or at least one recess (36, 136, 236, 38, 138, 238) projecting outwards in a radial direction in the connection region (16, 116, 216).
7. The check valve (2, 102, 202) according to claim 6, wherein the projection (24, 124, 224, 26, 126, 226, 32, 132, 232, 34, 134, 234) and/or the recess (36, 136, 236, 38, 138, 238) is configured in an annular shape.
8. Check valve (2, 102, 202) according to one of claims 6 or 7, wherein the projection (32, 132, 232, 34, 134, 234) is arranged on a front end section and/or a rear end section of the connection region (16, 116, 216).
9. A method of manufacturing a check valve (2, 102, 202) by means of injection moulding, the check valve comprising: a valve housing having a first housing part (4, 104, 204) and a second housing part (6, 106, 206); a valve element (8, 108, 208), in particular a flexible valve diaphragm, arranged within the valve housing for opening and closing the check valve (2, 102, 202), the method comprising the steps of:
a) plasticizing material for the first housing part (4, 104, 204) and injecting the material into a first mold to manufacture the first housing part (4, 104, 204) of the check valve (2, 102, 202); and plasticizing material for the second housing part (6, 106, 206) and injecting the material into a second mold to manufacture the second housing part (6, 106, 206) of the check valve (2, 102, 202),
b) assembling the non-return valve (2, 102, 202) such that the first housing part (4, 104, 204) and the second housing part (6, 106, 206) at least partially abut and/or at least partially overlap each other in the connection region (16, 116, 216), in particular at least partially abut and/or at least partially overlap each other in the connection region (16, 116, 216) to form a receiving space (28, 128, 228),
c) plasticizing the material and injection-coating the connecting region (16, 116, 216) to form an envelope (22, 122, 222) of the connecting region (16, 116, 216), such that the first housing part (4, 104, 204) and the second housing part (6, 106, 206) are connected to one another in a pressure-tight manner.
10. The method according to claim 9, wherein the first housing part (4, 104, 204) and the second housing part (6, 106, 206) are manufactured simultaneously.
11. The method according to any of claims 9 or 10, wherein in a further step the check valve (2, 102, 202) is functionally tested.
12. Method according to one of claims 9 to 11, wherein a material containing thermoplastic is used as material for the first housing part (4, 104, 204), the second housing part (6, 106, 206) and/or the envelope (22, 122, 222).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020100983.6A DE102020100983A1 (en) | 2020-01-16 | 2020-01-16 | Check valve and method of making a check valve |
| DE102020100983.6 | 2020-01-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113137502A true CN113137502A (en) | 2021-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110054030.0A Pending CN113137502A (en) | 2020-01-16 | 2021-01-15 | Check valve and method for producing a check valve |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113137502A (en) |
| DE (1) | DE102020100983A1 (en) |
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|---|---|---|---|---|
| US4749003A (en) * | 1987-01-22 | 1988-06-07 | Filtertek, Inc. | Center flow check valve |
| EP0947752A1 (en) * | 1998-03-30 | 1999-10-06 | Medex | Threshold valve |
| US6044859A (en) * | 1997-03-03 | 2000-04-04 | Filtertek Inc | Valve apparatus and method |
| DE202004009722U1 (en) * | 2004-06-21 | 2004-08-26 | Filtertek B.V. | check valve |
| CN101018917A (en) * | 2004-09-10 | 2007-08-15 | 阿尔弗雷德·凯驰两合公司 | Back flow preventor |
| CN201991647U (en) * | 2011-04-15 | 2011-09-28 | 皮尔伯格有限责任公司 | Tail gas recycle valve |
| US20150231385A1 (en) * | 2012-08-20 | 2015-08-20 | Illinois Tool Works Inc. | Low opening pressure anti-siphon check valve |
| CN105416039A (en) * | 2014-08-19 | 2016-03-23 | 伊顿公司 | Extension tube internal check valve |
| CN109642531A (en) * | 2016-08-23 | 2019-04-16 | 罗伯特·博世有限公司 | It can solenoid-operated suction valve and the method for manufacturing the solenoid-operated suction valve of energy |
| CN209146417U (en) * | 2017-11-09 | 2019-07-23 | 艾福迈精密部件公司 | Check-valves including valve chest, valve seat and flexible valve membrane |
-
2020
- 2020-01-16 DE DE102020100983.6A patent/DE102020100983A1/en active Pending
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2021
- 2021-01-15 CN CN202110054030.0A patent/CN113137502A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4749003A (en) * | 1987-01-22 | 1988-06-07 | Filtertek, Inc. | Center flow check valve |
| US6044859A (en) * | 1997-03-03 | 2000-04-04 | Filtertek Inc | Valve apparatus and method |
| EP0947752A1 (en) * | 1998-03-30 | 1999-10-06 | Medex | Threshold valve |
| DE202004009722U1 (en) * | 2004-06-21 | 2004-08-26 | Filtertek B.V. | check valve |
| CN101018917A (en) * | 2004-09-10 | 2007-08-15 | 阿尔弗雷德·凯驰两合公司 | Back flow preventor |
| CN201991647U (en) * | 2011-04-15 | 2011-09-28 | 皮尔伯格有限责任公司 | Tail gas recycle valve |
| US20150231385A1 (en) * | 2012-08-20 | 2015-08-20 | Illinois Tool Works Inc. | Low opening pressure anti-siphon check valve |
| CN105416039A (en) * | 2014-08-19 | 2016-03-23 | 伊顿公司 | Extension tube internal check valve |
| CN109642531A (en) * | 2016-08-23 | 2019-04-16 | 罗伯特·博世有限公司 | It can solenoid-operated suction valve and the method for manufacturing the solenoid-operated suction valve of energy |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102020100983A1 (en) | 2021-07-22 |
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