CN101245802A - Metal plastic compound screw cap - Google Patents
Metal plastic compound screw cap Download PDFInfo
- Publication number
- CN101245802A CN101245802A CNA200810015167XA CN200810015167A CN101245802A CN 101245802 A CN101245802 A CN 101245802A CN A200810015167X A CNA200810015167X A CN A200810015167XA CN 200810015167 A CN200810015167 A CN 200810015167A CN 101245802 A CN101245802 A CN 101245802A
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- CN
- China
- Prior art keywords
- metal
- metal insert
- screw cap
- plastic
- plastic compound
- Prior art date
- 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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Abstract
The invention discloses a metal plastic composite screw cap, belonging to the connecting part field. The metal plastic composite screw cap comprises a metal insert; the internal surface of the metal insert is provided with a thread; the external surface of the metal insert is provided with a clamping fin; a plastic layer is covered outside the metal insert. The metal plastic composite screw cap can avoid the problems of stress corrosion and crack and can obviously reduce cost.
Description
Technical field
The present invention relates to a kind of nut that connects fastening usefulness, be used for the fastening of split-type air conditioner indoor unit and outdoor unit connecting pipeline.
Background technique
At present, the fastening nut of known split-type air conditioner indoor unit and outdoor unit connecting pipeline is to be made by lead brass (HPb59-1).It is fastening that nut connects the machine pipe with indoor unit and outdoor unit, guarantees that refrigerant does not leak.But there is relatively serious stress corrosion cracking tendency in lead brass, (has acid, alkali, salt component in as air) when having the corrosivity condition in the external environment, because nut is under the stress condition, cause the nut cracking easily, cause coolant leakage, thereby air-conditioning was lost efficacy.At present, the way of head it off adopts mostly increases the nut wall thickness, can cause the rising of cost so again.
Summary of the invention
Suffer the deficiency of stress corrosion cracking easily in order to overcome the fastening nut of existing split-type air conditioner indoor unit and outdoor unit connecting pipeline, the invention provides a kind of metal plastic compound screw cap, it not only can avoid the stress corrosion cracking problem, and can reduce cost significantly.
Its technical solution is: metal plastic compound screw cap, comprise metal insert, and the internal surface of metal insert offers screw thread, and the outer surface of metal insert is provided with the card wing, and the external packets of metal insert is wrapped with plastic layer.
Above-mentioned metal insert and the moulding of plastic layer integral molded plastic.
The internal surface of above-mentioned metal insert one end is the sealing surface of taper.
The outer surface of above-mentioned metal insert evenly is provided with three card wings.
Above-mentioned metal insert is made by lead brass or stainless steel.
One opening end internal surface of above-mentioned plastic layer offers screw thread, and the screw thread on this plastic layer is connected with screw thread on the metal insert.
The main component of above-mentioned plastic layer is nylon and glass fibre.
The invention has the beneficial effects as follows: nut of the present invention since in the outer wrap of metal insert plastic layer, can guarantee to connect under the prerequisite of not leaking, avoided the stress corrosion cracking of nut effectively, plastic layer and the moulding of metal insert integral molded plastic, reduced process time, and the outer surface of metal insert is provided with the card wing, and metal insert and plastic layer are combined closely, and should not come off.
Description of drawings
Fig. 1 partly cuts open schematic representation for nut of the present invention;
Fig. 2 partly cuts open schematic representation for metal insert of the present invention;
Fig. 3 is the plan structure schematic representation of metal insert of the present invention.
The present invention is described in detail below in conjunction with accompanying drawing:
Embodiment
As accompanying drawing 1, shown in 2 and 3, metal plastic compound screw cap, comprise the inserts 1 that is made by lead brass, the internal surface of inserts 1 offers screw thread, it is 1.5-2mm that one end internal surface of inserts 1 is provided with thickness, angle is 45 ° a conical seal (contact) face 2, the outer surface of inserts 1 evenly is provided with three card wings 3, the thickness of each card wing is 1-1.5mm, the external packets of inserts 1 is wrapped with the plastic layer of being made by composite engineering plastics 4, the stretching of composite engineering plastics and flexural modulus are greater than 10000Mpa, all right resisting ultraviolet irradiation, the main component of composite engineering plastics is nylon and glass fibre.
Above-mentioned inserts 1 and plastic layer 4 integral molded plastic moulding, the existence of card wing 3 is closely linked inserts 1 and plastic layer 4, prevents to come off.
The profile of above-mentioned plastic layer 4 is consistent with existing nut.
One end internal surface of above-mentioned plastic layer 4 offers screw thread, and the screw thread on this plastic layer 4 is connected with screw thread on the inserts 1.
Certainly, protection scope of the present invention is not limited to the foregoing description, so long as those of ordinary skills, done according to the present invention without creatively improving, just should be within protection scope of the present invention.
Claims (7)
1, metal plastic compound screw cap is characterized in that comprising metal insert, and the internal surface of metal insert offers screw thread, and the outer surface of metal insert is provided with the card wing, and the external packets of metal insert is wrapped with plastic layer.
2, metal plastic compound screw cap according to claim 1 is characterized in that described metal insert and the moulding of plastic layer integral molded plastic.
3, metal plastic compound screw cap according to claim 1 and 2 is characterized in that the internal surface of described metal insert one end is the sealing surface of taper.
4, metal plastic compound screw cap according to claim 1 is characterized in that the outer surface of described metal insert evenly is provided with three card wings.
5,, it is characterized in that described metal insert made by lead brass or stainless steel according to claim 1 or 4 described metal plastic compound screw caps.
6, metal plastic compound screw cap according to claim 1 and 2 is characterized in that an opening end internal surface of described plastic layer offers screw thread, and the screw thread on this plastic layer is connected with screw thread on the metal insert.
7, metal plastic compound screw cap according to claim 6, the main component that it is characterized in that described plastic layer is nylon and glass fibre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810015167XA CN101245802A (en) | 2008-03-18 | 2008-03-18 | Metal plastic compound screw cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810015167XA CN101245802A (en) | 2008-03-18 | 2008-03-18 | Metal plastic compound screw cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101245802A true CN101245802A (en) | 2008-08-20 |
Family
ID=39946429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810015167XA Pending CN101245802A (en) | 2008-03-18 | 2008-03-18 | Metal plastic compound screw cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101245802A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016079083A1 (en) * | 2014-11-21 | 2016-05-26 | Solvay Specialty Polymers Usa, Llc | Overmolded inserts and methods for forming the same |
| CN111927914A (en) * | 2020-07-21 | 2020-11-13 | 常州市东力机械有限公司 | Steel-plastic composite integrated end cover and processing method thereof |
-
2008
- 2008-03-18 CN CNA200810015167XA patent/CN101245802A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016079083A1 (en) * | 2014-11-21 | 2016-05-26 | Solvay Specialty Polymers Usa, Llc | Overmolded inserts and methods for forming the same |
| CN107000278A (en) * | 2014-11-21 | 2017-08-01 | 索尔维特殊聚合物美国有限责任公司 | Coat molded insert and forming method thereof |
| US10493677B2 (en) | 2014-11-21 | 2019-12-03 | Solvay Specialty Polymers Usa, Llc | Overmolded inserts and methods for forming the same |
| CN111927914A (en) * | 2020-07-21 | 2020-11-13 | 常州市东力机械有限公司 | Steel-plastic composite integrated end cover and processing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080820 |