CN114161650A - Manufacturing method of waterproof vent valve - Google Patents
Manufacturing method of waterproof vent valve Download PDFInfo
- Publication number
- CN114161650A CN114161650A CN202111524274.7A CN202111524274A CN114161650A CN 114161650 A CN114161650 A CN 114161650A CN 202111524274 A CN202111524274 A CN 202111524274A CN 114161650 A CN114161650 A CN 114161650A
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- China
- Prior art keywords
- valve body
- diaphragm
- membrane
- ejector rod
- cavity
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
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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
- B29C45/14065—Positioning or centering articles in the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/748—Machines or parts thereof not otherwise provided for
- B29L2031/7506—Valves
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
A manufacturing method of a waterproof vent valve comprises the following steps: placing the diaphragm into a cavity of the valve body; placing an ejector rod device, wherein an ejector rod of the ejector rod device moves downwards to press the membrane in a cavity of the valve body; and when the ejector rod of the ejector rod device compresses the diaphragm, the valve body is subjected to secondary injection molding to manufacture a fixing part along the circumferential direction of the diaphragm on the upper side of the diaphragm by using a mold, so that the valve body is molded, and the diaphragm is fixed in the cavity of the valve body. According to the process for combining the valve body and the diaphragm in the waterproof vent valve, glue does not need to be coated on the diaphragm, welding is not needed, the diaphragm is firmly fixed inside the cavity of the valve body through the ejector rod device and secondary injection molding, the diaphragm is firmly contacted with the valve body, the phenomenon that micropores of the diaphragm are blocked due to high temperature is avoided, no gap is generated between the diaphragm and the valve body, the phenomenon that air is mixed with the atmosphere inside equipment is avoided, and the stability of the waterproof and breathable functions of the diaphragm is greatly improved.
Description
Technical Field
The invention relates to the field of machinery, in particular to a waterproof and breathable device, and particularly relates to a manufacturing method of a waterproof and breathable valve.
Background
Many lamps and lanterns, electronic control unit ECU, server switch board etc. need produce the phenomenon of holding back pressure with the interior space owing to there are factors such as temperature difference, need with the atmosphere UNICOM in order to avoid the inner space, but steam, dust etc. in the atmosphere are not wanted again and are got into the inner space, lead to the inner space humidity and pollution, consequently need waterproof ventilation valve to ensure that the inner space air is dry, avoid inner space and atmosphere to produce the pressure differential again.
In the prior art, the waterproof ventilation valve consists of a plastic valve, a plastic valve body, an ePTFE membrane and an O-shaped ring. The ePTFE membrane needs to be fixed inside the valve body, usually, glue is applied to the back of the membrane firstly, then the membrane is adhered to a cavity of the valve body to fix the membrane in position, then a plastic fixing block is added to compress the membrane, and finally the fixing block is welded on the valve body through a welding process. By such welding and gluing process a valve body with ePTFE membrane is obtained.
The plastic valve body is formed by high-temperature injection molding, then glue is applied to the back of the ePTFE membrane and is adhered to a valve body cavity, the membrane is pressed on the valve body through the fixing block, and finally the fixing block and the valve body are welded and combined into a whole. And this kind of welding process mode has product quality defect, and the fixed block displacement slightly will lead to producing the gap between ePTFE diaphragm and the valve body during the welding, makes internal pressure and atmosphere just establish ties through the gap, appears atmosphere and the direct UNICOM of valve body inner space, leads to the unable mesh of realizing filtered air of waterproof ventilation valve.
In the prior art plastic waterproof and breathable valves, the waterproof and breathable membrane and the valve body are fixed basically by heat welding, ultrasonic welding, laser welding or gluing, but these processes have disadvantages:
1) the welding mode is as follows: because the diaphragm is hidden in the valve body, the welding effect can not be observed during welding, and the welding process is unstable, so the diaphragm can be not firmly fixed in the valve body after welding, and the diaphragm and the valve body have a gap, so that the diaphragm is pushed open by gas to leak gas during ventilation, and the diaphragm does not play a role in filtering air.
2) Gluing mode: the diaphragm glue spreading bonds on the valve body, because the valve body is high temperature injection moulding, leads to glue to block up the micropore of diaphragm to the diaphragm can not ventilate, and final valve body does not play waterproof ventilative effect.
Waterproof ventilation valve: the ePTFE membrane is combined with the valve body through ultrasonic welding and the like to form a mounting component which can be sealed. The part is not permeable to air except for the membrane.
ePTFE: is an abbreviation of expanded PTFE, is a product processed into a porous structure by using PTFE resin raw material, has the characteristics of porosity and light weight of an expanded object, and is called expanded PTFE.
Disclosure of Invention
The invention aims to provide a manufacturing method of a waterproof vent valve, which aims to solve the technical problem that the manufacturing method of the waterproof vent valve in the prior art easily causes failure of waterproof and breathable functions.
The invention discloses a manufacturing method of a waterproof vent valve, which comprises the following steps:
step 10: the method comprises the following steps of (1) carrying out first injection molding by using a mold to manufacture a semi-finished valve body, wherein a cavity is arranged on the valve body and is a reserved diaphragm installation space;
step 20: keeping the semi-finished valve body in a mould, and putting the membrane into a cavity of the valve body;
step 30: placing an ejector rod device, driving an ejector rod in the ejector rod device to move downwards, and pressing a membrane in a cavity of the valve body;
step 40: when the membrane is tightly pressed by an ejector rod of the ejector rod device, the valve body is subjected to secondary injection molding along the circumferential direction of the membrane on the upper side of the membrane by using a mold, and a fixing piece is manufactured, so that the valve body is molded, and the membrane is fixed in a cavity of the valve body;
step 50: after the second injection molding is finished, taking out the ejector rod device, and then demolding the valve body to finish the injection molding of the valve body;
step 60: and finally, installing a valve cover and an O-shaped ring to complete the assembly of the waterproof ventilation valve.
Furthermore, the ejector rod device comprises at least two ejector rods and a driving device, and any one ejector rod is connected with the power output end of the driving device through a transmission mechanism.
Further, the membrane is an ePTFE membrane.
Compared with the prior art, the invention has positive and obvious effect. According to the process for combining the valve body and the diaphragm in the waterproof ventilation valve, glue does not need to be coated on the diaphragm, welding is not needed, the diaphragm is firmly fixed inside the cavity of the valve body through the ejector rod device and secondary injection molding, the diaphragm is firmly contacted with the valve body, the diaphragm is not easy to be ejected by gas to leak, the phenomenon that the diaphragm is blocked by micropores due to high temperature is avoided, a gap is not generated between the diaphragm and the valve body, the phenomenon that the inside of equipment is mixed with atmosphere is avoided, and the stability of the waterproof ventilation function of the diaphragm is greatly improved.
Drawings
Fig. 1 is a schematic diagram of step 10 of a method of manufacturing a waterproof vent valve of the present invention.
Fig. 2 is a schematic diagram of step 20 of a method of manufacturing a waterproof vent valve of the present invention.
Fig. 3 is a schematic diagram of step 30 of a method of manufacturing a waterproof vent valve of the present invention.
Fig. 4 is a schematic diagram of step 40 of a method of manufacturing a waterproof vent valve of the present invention.
Fig. 5 is a schematic diagram of step 50 of a method of manufacturing a waterproof vent valve of the present invention.
Fig. 6 is a schematic diagram of step 60 of a method of manufacturing a waterproof vent valve of the present invention.
Detailed Description
The present invention will be further described with reference to the drawings and examples, but the present invention is not limited to the examples, and all similar structures and similar variations using the present invention shall fall within the scope of the present invention. The use of the directions of up, down, front, back, left or right in the present invention is only for the convenience and clarity of description, and is not a limitation to the technical solution of the present invention.
Example 1
As shown in fig. 1 to 6, the method for manufacturing a waterproof vent valve of the present invention includes the following steps:
step 10: a semi-finished valve body 1 is manufactured by performing first injection molding by using a mold, a cavity 2 is arranged on the valve body 1, and the cavity 2 is a reserved diaphragm installation space;
step 20: keeping the semi-finished valve body 1 in a mould, and placing a membrane 3 into a cavity 2 of the valve body 1;
step 30: placing an ejector rod device, driving an ejector rod 4 of the ejector rod device to move downwards, and pressing a membrane 3 in a cavity 2 of a valve body 1;
step 40: when an ejector rod 4 of the ejector rod device presses the membrane 3 tightly, the valve body 1 is subjected to secondary injection molding on the upper side of the membrane 3 along the circumferential direction of the membrane 3 by using a mold, and a fixing piece 5 is manufactured, so that the valve body 1 is molded, and the membrane 3 is fixed in a cavity 2 of the valve body 1;
step 50: after the second injection molding is finished, the ejector rod device is taken out, and then the valve body 1 is demolded to finish the injection molding of the valve body 1;
step 60: and finally, installing a valve cover 6 and an O-shaped ring 7 to complete the assembly of the waterproof vent valve.
Furthermore, the ejector rod device comprises at least two ejector rods 4 and a driving device, and any one ejector rod 4 is connected with the power output end of the driving device through a transmission mechanism.
Specifically, the driving device is a motor.
Further, the membrane 3 is an ePTFE membrane.
Specifically, the mold, the motor, and the like in this embodiment all adopt known schemes in the prior art, which are known to those skilled in the art and are not described herein again.
The working principle of the embodiment is as follows:
according to the process for combining the valve body 1 and the membrane 3 in the waterproof ventilation valve, glue does not need to be coated on the membrane 3, welding is not needed, the membrane 3 is tightly pressed through the ejector rod device, the fixing piece 5 is manufactured through secondary injection molding, the membrane 3 is firmly fixed inside the cavity 2 of the valve body 1, the membrane 3 is firmly contacted with the valve body 1, the membrane 3 is not easy to be ejected by gas to cause air leakage, the phenomenon that the membrane 3 generates micropore blockage due to high temperature is avoided, no gap is generated between the membrane 3 and the valve body 1, the phenomenon that the air in the device is mixed with the atmosphere is avoided, and the stability of the waterproof ventilation function of the membrane 3 is greatly improved.
Claims (3)
1. A manufacturing method of a waterproof ventilation valve is characterized by comprising the following steps:
step 10: the method comprises the following steps of (1) carrying out first injection molding by using a mold to manufacture a semi-finished valve body, wherein a cavity is arranged on the valve body and is a reserved diaphragm installation space;
step 20: keeping the semi-finished valve body in a mould, and putting the membrane into a cavity of the valve body;
step 30: placing an ejector rod device, driving an ejector rod of the ejector rod device to move downwards, and pressing a membrane in a cavity of the valve body;
step 40: when the membrane is tightly pressed by an ejector rod of the ejector rod device, the valve body is subjected to secondary injection molding along the circumferential direction of the membrane on the upper side of the membrane by using a mold, and a fixing piece is manufactured, so that the valve body is molded, and the membrane is fixed in a cavity of the valve body;
step 50: after the second injection molding is finished, the ejector rod device is taken out, and then the valve body is demoulded to finish the injection molding of the valve body;
step 60: and finally, installing a valve cover and an O-shaped ring to complete the assembly of the waterproof ventilation valve.
2. The manufacturing method of the waterproof ventilation valve as claimed in claim 1, wherein the ejector device comprises at least two ejector rods and a driving device, and any one of the ejector rods is connected with a power output end of the driving device through a transmission mechanism.
3. The method of claim 1, wherein the membrane is an ePTFE membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111524274.7A CN114161650A (en) | 2021-12-14 | 2021-12-14 | Manufacturing method of waterproof vent valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111524274.7A CN114161650A (en) | 2021-12-14 | 2021-12-14 | Manufacturing method of waterproof vent valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114161650A true CN114161650A (en) | 2022-03-11 |
Family
ID=80486245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111524274.7A Pending CN114161650A (en) | 2021-12-14 | 2021-12-14 | Manufacturing method of waterproof vent valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN114161650A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116423861A (en) * | 2023-05-26 | 2023-07-14 | 上海皓固机械工业有限公司 | Manufacturing die and manufacturing method for semiconductor ultra-high purity membrane |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201851723U (en) * | 2010-11-19 | 2011-06-01 | 王永球 | Integrally formed waterproof breather valve |
| CN203453567U (en) * | 2013-08-27 | 2014-02-26 | 上海文依电器有限公司 | Threaded waterproof air valve |
| CN203784755U (en) * | 2014-03-24 | 2014-08-20 | 东晨光电集团有限公司 | LED street lamp holder with waterproof breateher valves |
| CN205173554U (en) * | 2015-12-15 | 2016-04-20 | 宁波通冠电气自动化设备有限公司 | Waterproof ventilation valve |
| CN111022725A (en) * | 2019-11-06 | 2020-04-17 | 上海阿莱德实业股份有限公司 | Combined waterproof ventilation valve, assembly and manufacturing method |
-
2021
- 2021-12-14 CN CN202111524274.7A patent/CN114161650A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201851723U (en) * | 2010-11-19 | 2011-06-01 | 王永球 | Integrally formed waterproof breather valve |
| CN203453567U (en) * | 2013-08-27 | 2014-02-26 | 上海文依电器有限公司 | Threaded waterproof air valve |
| CN203784755U (en) * | 2014-03-24 | 2014-08-20 | 东晨光电集团有限公司 | LED street lamp holder with waterproof breateher valves |
| CN205173554U (en) * | 2015-12-15 | 2016-04-20 | 宁波通冠电气自动化设备有限公司 | Waterproof ventilation valve |
| CN111022725A (en) * | 2019-11-06 | 2020-04-17 | 上海阿莱德实业股份有限公司 | Combined waterproof ventilation valve, assembly and manufacturing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116423861A (en) * | 2023-05-26 | 2023-07-14 | 上海皓固机械工业有限公司 | Manufacturing die and manufacturing method for semiconductor ultra-high purity membrane |
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