CN106738743A - A kind of new water meter glass and preparation method thereof - Google Patents
A kind of new water meter glass and preparation method thereof Download PDFInfo
- Publication number
- CN106738743A CN106738743A CN201611063744.3A CN201611063744A CN106738743A CN 106738743 A CN106738743 A CN 106738743A CN 201611063744 A CN201611063744 A CN 201611063744A CN 106738743 A CN106738743 A CN 106738743A
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- CN
- China
- Prior art keywords
- disk
- water meter
- preparation
- nylon
- water
- 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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Classifications
-
- 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
-
- 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
- B29C45/76—Measuring, controlling or regulating
-
- 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/10—Preventing damage by freezing or excess pressure or insufficient pressure
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76498—Pressure
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76531—Temperature
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76551—Time
- B29C2945/76561—Time duration
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The present invention relates to water meter technical field, a kind of new water meter glass and preparation method thereof is specifically disclosed, water gage glass bottom is the first disk, and top is the second disk, the diameter with diameter greater than the second disk of the first disk；Water gage glass is made from nylon 12, and step is as follows：Treatment is dried to nylon 12；Dried nylon 12 injection injection machine is carried out into fusion plastification；Nylon 12 after melting is injected into mold cavity, mould is shaped as "convex" shaped；Injection pressurize is carried out, after cooling shaping, die sinking draws product.Water gage glass simple structure of the present invention, low manufacture cost, efficiency high, the water gage glass produced is firm, durable, transparency is high, not only there is the performance of the adverse circumstances that can resist subzero 30 DEG C in the case where meter reading is not influenceed, also there is anti-burst and anti-strike ability, ensure that water meter does not rupture in season in severe winter, ne-leakage does not influence resident's normal life water.
Description
Technical field
The present invention relates to water meter manufacture technology field, specifically a kind of new water meter glass and preparation method thereof.
Background technology
Water meter is the instrument for measuring water-carrying capacity, is mostly the integrated flow measurement of water, is generally divided into volumetric water meter and speed
The class of degree formula water meter two.Water meter is used to record the instrument of running water water consumption, on water pipe, when user discharges water, and pointer on table
Or character wheel rotates the water for pointing out to pass through.
Open air being mounted in life, water meter, in the case of wintry weather cold, easy water meter occurs freezing more
Situation, cause water meter to be effectively operated, and water in water meter freezes rear volume and becomes big, may result in dial plate
On sheet glass crush, the daily life for giving people causes trouble, particularly 2015 end of the years cold quick-fried air and lowers the temperature suddenly, entirely
State's particularly southern area temperature reaches subzero 10 degree, and resident living water table there occurs major part in the environment of subzero 10 degree
Bursting by freezing, freezing phenomenon, overnight current cause disaster, bring great trouble to the life of the people, life cannot be commonly used just
Water.Installation environment for water meter and characteristic is used, water gage glass part is safety glass all the time, it is transparent convenient to read
Number, but safety glass easily occurs freezing quick-fried phenomenon under cold quick-fried air ambient, so needing to invent a kind of new water meter glass
Glass and preparation method thereof, the water gage glass produced can resist subzero 30 DEG C of environment, it is ensured that water meter does not rupture, ne-leakage, no
Influence resident's normal life water.
The content of the invention
To overcome the deficiencies in the prior art, the invention provides a kind of simple new water meter glass and preparation method thereof,
Water gage glass firm and durable is produced, and with freeze proof, anti-burst and anti-strike ability.
In order to solve the technical problem in background technology, the invention provides a kind of new water meter glass, the water meter glass
Glass bottom is the first disk, and top is the second disk, the diameter with diameter greater than the second disk of first disk, described second
Disk is arranged on the first disk, and second disk and the first disk are arranged concentrically, and the water gage glass is by acyl in poly- 12
Amine is made.
A kind of preparation method of new water meter glass, the water gage glass is made from nylon 12, and step is as follows：
S1, treatment is dried to nylon 12；
S2, dried nylon 12 injection injection machine is carried out into fusion plastification, melt temperature is 230 DEG C -250
℃；
S3, the nylon 12 after melting is injected into mold cavity, the mould is shaped as "convex" shaped；
S4, injection pressurize is carried out, after cooling shaping, die sinking draws product.
Further, the temperature of dried process described in S1 is 85 DEG C -100 DEG C, and the time is 5-6 hours.
Further, the bottom of "convex" shaped mould described in S3 is the first disk, and top is the second disk, described first
The diameter with diameter greater than the second disk of disk.
Specifically, second disk is arranged on the first disk, and second disk and the first disk are arranged concentrically.
Further, the temperature of mould described in S3 is 90 DEG C -100 DEG C, and injection pressure is 80MPa-100MPa.
Further, dwell pressure described in S4 is 50MPa-60MPa, and the dwell time is 20s-32s.
Further, the die shrinkage of the nylon 12 is that 0.7%, hygroscopicity is 1.5%.
Further, the heat distortion temperature of the nylon 12 is 135 DEG C, and surrender tensile strength is 60MPa.
Beneficial effects of the present invention：The preparation method of new water meter glass of the present invention is simple, low manufacture cost, efficiency high,
The water gage glass produced is firm, durable, transparency is high, not only subzero with that can resist in the case where meter reading is not influenceed
The performance of 30 DEG C of adverse circumstances, also with anti-burst and anti-strike ability, it is ensured that water meter does not rupture in season in severe winter, nothing is oozed
Leakage, resident's normal life water is not influenceed.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the flow chart of water gage glass preparation method of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
The invention discloses a kind of new water meter glass, the water gage glass bottom is the first disk, and top is the second circle
Disk, the diameter with diameter greater than the second disk of first disk, second disk is arranged on the first disk, and described second
Disk and the first disk are arranged concentrically, and the water gage glass is made up of nylon 12.The water gage glass is arranged on water meter
In the copper cover of device, there is a round hole upper surface of copper cover, and second disk stretches out the round hole, described first
The upper surface of disk is fitted with the upper surface medial surface of the copper cover, the medial surface of the side of first disk and the copper cover
Laminating；Second disk stretches out the round hole, and the side wall of second round platform fits in the hole of the round hole
Wall.The thickness of second disk is equal with the thickness of copper cover upper surface, the upper surface of the water gage glass and the upper table of copper cover
Face is concordant, and the design and installation positioning of the second disk is convenient, reduces the use of installation process middle washer, enhances the strong of product
Degree, and anti-bearing capacity, by national water meter professional standard requirement hydraulic pressure pressure-bearing is to 1.6 times of 1.6MPa and keeps 15min, or
Hydraulic pressure reaches 3.2PMa and keeps 1min, but the effect that the present invention reaches beyond this limit range, reaches 4MPa and keeps 72
Hour does not rupture nothing and oozes, it is ensured that resident is not perplexed by domestic water.
A kind of preparation method of new water meter glass, the water gage glass is made from nylon 12, and described poly- ten
Also known as nylon 12, polylauryllactam, the base stock of its polymerization is butadiene to two lactams (PA12), can be dependent on oil
Work, is hypocrystalline-crystallographic thermoplastic material.Nylon 12 is similar to nylon 11 performance, and relative density is small, is minimum in nylon series
's.PA12 is good electrical insulators and will not be because of moisture effect insulating properties as other polyamide.It has very well
Impact resistance chemical machine stability.
In one embodiment of the invention, as shown in figure 1, specific make step is as follows：
S1, treatment is dried to nylon 12；
In order to ensure the transparency of water gage glass, the temperature of the dried process is 85 DEG C -100 DEG C, and the time is that 5-6 is small
When；Preferable temperature is 90 DEG C in the present embodiment, and the time is 6 hours, but the present invention is not limited to this temperature, is 85 in temperature
DEG C -100 DEG C, the time is that can equally realize the present invention in the range of 5-6 hours.
S2, dried nylon 12 injection injection machine is carried out heating and reaches molten state, melt temperature
It is 230 DEG C -250 DEG C；The temperature of the mould is 90 DEG C -100 DEG C, and injection pressure is 80MPa-100MPa.
The temperature of mould is preferably 90 DEG C in the present embodiment, and injection pressure is preferably 95MPa, but the present invention is not limited to
This temperature, the present invention can be equally realized in the range of 90 DEG C -100 DEG C of temperature, injection pressure 80MPa-100MPa.
S3, funcition table for injecting movement, nozzle and mould are coupled together, and the nylon 12 after melting is injected into mould type
Chamber, the mould is shaped as "convex" shaped；The bottom of the "convex" shaped mould is the first disk, and top is the second disk,
The diameter with diameter greater than the second disk of first disk, second disk is arranged on the first disk, second circle
Disk and the first disk are arranged concentrically, the equal diameters of copper cover top endoporus in the diameter and water meter device of the second disk.
S4, injection pressurize is carried out, after cooling shaping, die sinking draws product；In order to product shrinks change in preventing cooling procedure
Shape, so needing to carry out injection pressurize, the dwell pressure is 50MPa-60MPa, and the dwell time is 20s-32s, the present embodiment
Middle dwell pressure is preferably 50MPa, and the dwell time is preferably 25s, but the present invention is not limited to this temperature, is in dwell pressure
50MPa-60MPa, the dwell time is 20s-32s, in the range of can equally realize the present invention.
After cooling shaping, die sinking draws product, light transmittance >=90% of obtained water gage glass.
The effect of pressurize is that the solution in die cavity is compacted, and the nylon 12 in die cavity has been close to die wall
Accurate shape is obtained, different time and different directions is fused into an entirety into the material at the same position of die cavity, supplemented
Cooling meat, so as to the new water gage glass that a qualified disk adds disk boss shape is obtained.
In one embodiment of the invention, in order to ensure intensity, toughness, the antifreeze freeze proof and anti-burst etc. of water gage glass
Performance, the die shrinkage of the nylon 12 is that 0.7%, hygroscopicity is 1.5%, the heat change of the nylon 12
Shape temperature is 135 DEG C, and surrender tensile strength is 60MPa.
Beneficial effects of the present invention：The preparation method of new water meter glass of the present invention is simple, low manufacture cost, efficiency high,
The water gage glass produced is firm, durable, transparency is high, not only subzero with that can resist in the case where meter reading is not influenceed
The performance of 30 DEG C of adverse circumstances, also with anti-burst and anti-strike ability, it is ensured that water meter does not rupture in season in severe winter, nothing is oozed
Leakage, resident's normal life water is not influenceed.
The above is the preferred embodiment of the present invention, it should be noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (9)
1. a kind of new water meter glass, it is characterised in that the water gage glass bottom is the first disk, top is the second disk,
The diameter with diameter greater than the second disk of first disk, second disk is arranged on the first disk, second circle
Disk and the first disk are arranged concentrically.
2. a kind of preparation method of new water meter glass, the water gage glass is made from nylon 12, and step is as follows：
S1, treatment is dried to nylon 12；
S2, dried nylon 12 injection injection machine is carried out into fusion plastification, melt temperature is 230 DEG C -250 DEG C；
S3, the nylon 12 after melting is injected into mold cavity, the mould is shaped as "convex" shaped；
S4, injection pressurize is carried out, after cooling shaping, die sinking draws product.
3. the preparation method of a kind of new water meter glass according to claim 2, it is characterised in that at being dried described in S1
The temperature of reason is 85 DEG C -100 DEG C, and the time is 5-6 hours.
4. a kind of preparation method of new water meter glass according to claim 2, it is characterised in that "convex" shaped described in S3
The bottom of mould is the first disk, and top is the second disk, the diameter with diameter greater than the second disk of first disk.
5. the preparation method of a kind of new water meter glass according to claim 4, it is characterised in that second disk sets
Put on the first disk, second disk and the first disk are arranged concentrically.
6. a kind of preparation method of new water meter glass according to claim 2, it is characterised in that mould described in S3
Temperature is 90 DEG C -100 DEG C, and injection pressure is 80MPa-100MPa.
7. a kind of preparation method of new water meter glass according to claim 2, it is characterised in that pressurize pressure described in S4
Power is 50MPa-60MPa, and the dwell time is 20s-32s.
8. a kind of preparation method of new water meter glass according to claim 1, it is characterised in that acyl in described poly- 12
The die shrinkage of amine is that 0.7%, hygroscopicity is 1.5%.
9. a kind of preparation method of new water meter glass according to claim 6, it is characterised in that acyl in described poly- 12
The heat distortion temperature of amine is 135 DEG C, and surrender tensile strength is 60MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611063744.3A CN106738743A (en) | 2016-11-28 | 2016-11-28 | A kind of new water meter glass and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611063744.3A CN106738743A (en) | 2016-11-28 | 2016-11-28 | A kind of new water meter glass and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106738743A true CN106738743A (en) | 2017-05-31 |
Family
ID=58901850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611063744.3A Pending CN106738743A (en) | 2016-11-28 | 2016-11-28 | A kind of new water meter glass and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106738743A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108000781A (en) * | 2017-12-04 | 2018-05-08 | 华中科技大学鄂州工业技术研究院 | A kind of injection molding method for being used to prepare transparent devices |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201032458Y (en) * | 2007-03-09 | 2008-03-05 | 吴福康 | Anti-frozen crack watermeter |
| JP4377577B2 (en) * | 2002-11-19 | 2009-12-02 | ミクニプラスチックス株式会社 | Underground or ground laying injection molded product |
| CN101608063A (en) * | 2009-07-06 | 2009-12-23 | 株洲时代工程塑料制品有限责任公司 | Line for Passenger Transportation fastener system nylon part low temperature resistant proprietary material and preparation method thereof |
| CN103709507A (en) * | 2013-12-13 | 2014-04-09 | 宁波金泉仪表有限公司 | Water meter shell material and preparation method thereof |
| CN105128279A (en) * | 2015-08-25 | 2015-12-09 | 芜湖市恒峰科技有限公司 | Injection mold of water meter shell |
| CN205079824U (en) * | 2015-10-29 | 2016-03-09 | 宁波东海仪表水道有限公司 | Water gauge is prevented tearing open in liquid seal |
-
2016
- 2016-11-28 CN CN201611063744.3A patent/CN106738743A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4377577B2 (en) * | 2002-11-19 | 2009-12-02 | ミクニプラスチックス株式会社 | Underground or ground laying injection molded product |
| CN201032458Y (en) * | 2007-03-09 | 2008-03-05 | 吴福康 | Anti-frozen crack watermeter |
| CN101608063A (en) * | 2009-07-06 | 2009-12-23 | 株洲时代工程塑料制品有限责任公司 | Line for Passenger Transportation fastener system nylon part low temperature resistant proprietary material and preparation method thereof |
| CN103709507A (en) * | 2013-12-13 | 2014-04-09 | 宁波金泉仪表有限公司 | Water meter shell material and preparation method thereof |
| CN105128279A (en) * | 2015-08-25 | 2015-12-09 | 芜湖市恒峰科技有限公司 | Injection mold of water meter shell |
| CN205079824U (en) * | 2015-10-29 | 2016-03-09 | 宁波东海仪表水道有限公司 | Water gauge is prevented tearing open in liquid seal |
Non-Patent Citations (4)
| Title |
|---|
| 刘峥等: "《塑料成型工艺及模具》", 30 November 2013, 重庆大学出版社 * |
| 北京电力公司供应处: "《电力器材验收保管手册》", 31 August 1965, 中国工业出版社 * |
| 崔继耀: "《注塑生产疑难问题与对策》", 31 July 2008, 国防工业出版社 * |
| 杨明山: "《现代工程塑料改性：理论与实践》", 31 July 2009, 中国轻工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108000781A (en) * | 2017-12-04 | 2018-05-08 | 华中科技大学鄂州工业技术研究院 | A kind of injection molding method for being used to prepare transparent devices |
| US20210129385A1 (en) * | 2017-12-04 | 2021-05-06 | Huazhong University Of Science And Technology | Injection molding method for fabricating transparent device |
| US11820045B2 (en) * | 2017-12-04 | 2023-11-21 | Huazhong University Of Science And Technology | Injection molding method for fabricating transparent device |
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Application publication date: 20170531 |
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