CN1058076C - Seal packing and its making method - Google Patents
Seal packing and its making method Download PDFInfo
- Publication number
- CN1058076C CN1058076C CN96115570A CN96115570A CN1058076C CN 1058076 C CN1058076 C CN 1058076C CN 96115570 A CN96115570 A CN 96115570A CN 96115570 A CN96115570 A CN 96115570A CN 1058076 C CN1058076 C CN 1058076C
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- sealing
- sealing gasket
- polyurethane foam
- substrate
- foam rubber
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- Expired - Fee Related
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- Sealing Material Composition (AREA)
Abstract
The present invention relates to a sealing gasket which belongs to a sealing gasket using a polyurethane foaming rubber belt to realize linear sealing. The sealing gasket is composed of a nonmetallic basal plate and the polyurethane foaming rubber belt, wherein the polyurethane foaming rubber belt is fixed to the basal plate. The structure of the polyurethane foaming rubber belt can be in a closed form and can also be in an open form. The shape of the polyurethane foaming rubber belt is matched with the shape of the sealing opening position of a sealing member. When in use, the sealing gasket not only has the advantage of good sealing performance but also has low requirements for the smoothness and the unevenness of the integrated surface of the sealing member. The sealing gasket also has favorable sealing performance on non-machined surfaces. The sealing gasket has the producing method that 20kg of polyurethane rubber particles are heated to be at the temperature of 40 DEG C to 160 DEG C; then 40kg of dimethyl formamide and 40kg of water soluble salt are added; after evenly stirred, the dimethyl formamide and the water soluble salt are leaked and printed on the basal plate in a leaking and printing method, so the sealing gasket is made.
Description
The present invention relates to a kind of sealed mouth place, realize the sealing gasket and the manufacture method thereof of linear sealing at Sealing.
Sealing gasket is the indispensable accessories of equipment such as various pipelines, container, motor, machinery, pump, down-hole sniffer.The sealing gasket that uses is at the sealed mouth place at present, carries out plane sealing.Plane sealing pressure is little, and pressure distribution is unreasonable, so poor sealing performance, and particularly the requirement of comprehensive face degree of finish of Sealing and Roughness is very high, thereby has increased the cost of Sealing.
Purpose of the present invention is the problems referred to above that exist at sealing gasket, and a kind of closed type polyurethane foam rubber tape that adopts at the sealed mouth place is provided, and realizes the sealing gasket and the manufacture method thereof of linear sealing.
Seal washer is made of substrate and linear sealing strip.Linear sealing strip is a closed type polyurethane foam rubber tape, also can be open type polyurethane foam rubber tape.The shape at the sealed mouth place of the shape of polyurethane foam rubber tape and Sealing adapts.Substrate is made by nonmetallic material, as paper, plastics, asbestos etc., needs the shape of the joint that seals to adapt between its shape and the Sealing.The polyurethane foam rubber tape is fixed on the substrate.
Sealing gasket of the present invention owing to be linear sealing, concentrates on the polyurethane foam rubber tape pressure, and sealing load increases, sealability improves.In addition, less demanding to the degree of finish and the Roughness of the comprehensive face of sealing of Sealing, non-machining surface is also had excellent sealing performance.Sealing gasket of the present invention also can be fixed with the polyurethane foam rubber tape, with its sealability of further raising on the two-sided corresponding position of its substrate.
The manufacture method of sealing gasket is:
1, the polyurethane micelle with 15～25kg is heated to 40～160 ℃, the dimethyl formamide that adds 30～55kg again, after mixing, according to user's needs as going into an amount of stain, the water soluble salt that adds 20～55kg again, stirring, the back is standby (can to add coloured differently according to product needed, make versicolor urethane rubber liquid), another kind method be the polyurethane micelle with 15～25kg directly be added to place 0.1～15 day in the dimethyl formamide of 30～55kg after, the water soluble salt that adds 20～55kg again, the back that stirs is standby;
2, press the shape need at Sealing sealed mouth place, adopt print process, stencil printing or the water clock method of leaking, the above-mentioned urethane rubber liquid for preparing is leaked put on substrate, solidify the back and form closed type or open type polyurethane foam rubber tape;
3, with the above-mentioned substrate that has closed type or open type polyurethane foam rubber tape, be placed on and soak 0.1～12 hour in the water, separate out the water soluble salt in the polyurethane foam rubber tape, after the taking-up drying, be the sealing gasket finished product.
Fig. 1 is a kind of example structure schematic representation of the present invention, and Fig. 2 is a user mode structural representation of the present invention.The invention will be further described below in conjunction with accompanying drawing.
The described sealing gasket of the foregoing description is the sealing gasket that is used for the flange connections of the nitrogen circulation pipeline on the reactor.Sealing pad 3 is made of 1,2 circular polyurethane foam rubber tapes 2 of substrate.Substrate 1 is a cardboard, and 2 circular polyurethane foam rubber tapes 2 are fixed on the symmetrical position of front and back of substrate 1.Sealing gasket 3 is arranged on the flange connections of pipeline 4 and pipeline 5, couples together by the flange 7 of bolt with the flange 6 of pipeline 4, sealing gasket 3, pipeline 5, after this pipe feeds high pressure nitrogen, does not have the nitrogen leakage failure to take place, the sealability height, and the sealing gasket cost is low.
The charge ratio of the circular polyurethane foam rubber tape 2 in the foregoing description is: polyurethane amine grain 20kg dimethylformamide 40kg, salt 40kg.The manufacture method of circular polyurethane foam rubber tape 2 is identical with the manufacture method of the polyurethane foam rubber tape that the front was narrated.
Claims (7)
1, sealing gasket is made of substrate and linear sealing strip, needs the shape of the joint that seals to adapt between the shape of substrate and the Sealing, and the shape at the sealed mouth place of the shape of linear sealing strip and Sealing adapts, and it is characterized in that:
A, substrate are non-metal board;
B, linear sealing strip are the polyurethane foam rubber tape;
C, polyurethane foam rubber tape are fixed on the substrate.
2, sealing gasket according to claim 1 is characterized in that described polyurethane foam rubber tape can be the closed type structure, also can be open architecture.
3, sealing gasket according to claim 1 is characterized in that being fixed with the polyurethane foam rubber tape on the two-sided corresponding position of substrate (1).
4, sealing gasket according to claim 1, it is characterized in that described substrate is the ring cardboard, the polyurethane foam rubber tape is circular polyurethane foam rubber tape, 2 circular polyurethane foam rubber tapes are fixed on the corresponding position of front and back of ring substrate.
5, the compound method of sealing gasket is characterized in that:
A, the polyurethane micelle of 15～25kg is heated to 40～160 ℃, adds the dimethyl formamide of 30～55kg again, after mixing, add the water soluble salt of 20～55kg, the back that stirs is standby;
B, press the shape need at Sealing sealed mouth place, adopt the method for biting or stencil printing, water clock method, the above-mentioned urethane rubber for preparing is leaked put on substrate, solidify the back and form the polyurethane foam rubber tape;
C, the above-mentioned substrate that has the polyurethane foam rubber tape is put into water soaked 0.1～12 hour, take out airing, be the sealing gasket finished product.
6, the compound method of sealing gasket is characterized in that:
A, with the polyurethane micelle of 15～25kg, the dimethyl formamide that adds 30～55kg was placed after 0.1～15 day, the back that stirs is standby;
B, press the shape need at Sealing sealed mouth place, adopt the method for biting or stencil printing, water clock method, the above-mentioned urethane rubber for preparing is leaked put on substrate, solidify the back and form the polyurethane foam rubber tape;
C, the above-mentioned substrate that has the polyurethane foam rubber tape is put into water soaked 0.1～12 hour, take out airing, be the sealing gasket finished product.
7, the compound method of sealing gasket according to claim 5, the charge ratio that it is characterized in that polyurethane micelle, dimethyl formamide, water soluble salt are urethane rubber 20kg, dimethyl formamide 40kg, water soluble salt 40kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96115570A CN1058076C (en) | 1996-09-02 | 1996-09-02 | Seal packing and its making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96115570A CN1058076C (en) | 1996-09-02 | 1996-09-02 | Seal packing and its making method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1175667A CN1175667A (en) | 1998-03-11 |
| CN1058076C true CN1058076C (en) | 2000-11-01 |
Family
ID=5122807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96115570A Expired - Fee Related CN1058076C (en) | 1996-09-02 | 1996-09-02 | Seal packing and its making method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1058076C (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4101138A (en) * | 1976-11-25 | 1978-07-18 | Fiat Societa Per Azioni | Gasket for internal combustion engines, incorporating locating pins |
-
1996
- 1996-09-02 CN CN96115570A patent/CN1058076C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4101138A (en) * | 1976-11-25 | 1978-07-18 | Fiat Societa Per Azioni | Gasket for internal combustion engines, incorporating locating pins |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1175667A (en) | 1998-03-11 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |