CN108407235A - A kind of processing technology of precise injection molding part - Google Patents
A kind of processing technology of precise injection molding part Download PDFInfo
- Publication number
- CN108407235A CN108407235A CN201810185961.2A CN201810185961A CN108407235A CN 108407235 A CN108407235 A CN 108407235A CN 201810185961 A CN201810185961 A CN 201810185961A CN 108407235 A CN108407235 A CN 108407235A
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- Prior art keywords
- mold
- raw material
- injection molding
- molding part
- finished product
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Classifications
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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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/57—Exerting after-pressure on the moulding material
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of processing technologys of precise injection molding part, are as follows：Raw material is extracted, raw material mixing prepares mold, molding, filling, pressurize, cooling, die sinking, demoulding, refine, film；Extract raw material; the raw material is mixed according to a certain percentage, pours into feeding machine, by ready mold clamping; the raw material is injected by feeding machine in the mold and is filled; pressurize processing then is carried out to the mold, room temperature is then cooled to, opens the mold; semi-finished product are demoulded out of described mold; refine is carried out to the semi-finished product, last coating protective film obtains finished product.By the above-mentioned means, the present invention can optimize moulding production technology, improve production efficiency, moulding precision is improved, while improving moulding corrosion resistance and anti-aging property, improves service life.
Description
Technical field
The present invention relates to moulding manufacture fields, more particularly to a kind of processing technology of precise injection molding part.
Background technology
Moulding refers to being referred to as moulding, including various packagings, part etc. by the various injecting products that injection molding machine produces.It is main
If materials such as polyethylene or polypropylene and made of being added to after a variety of organic solvents, the selection of plastic part depends mainly on
The type (thermoplasticity or thermosetting property) of plastics, the shape and size of starting form and product.Moulding is made generally to use
Molding, transfer modling, also with injection moulding.Lamination, molding and thermoforming are that plastics is made to be molded in the plane.The above method,
It can be used for rubber processing.In addition, also having using liquid monomer or polymer as casting of raw material etc..In these methods, to squeeze out
The forming method with the most use and most basic with injection moulding.Existing Shooting Technique, although comparative maturity,
The space being still improved in accuracy.
Invention content
The invention mainly solves the technical problem of providing a kind of processing technologys of precise injection molding part, can optimize moulding
Production technology improves production efficiency, improves moulding precision, while improving moulding corrosion resistance and anti-aging property,
Improve service life.
In order to solve the above technical problems, one aspect of the present invention is：A kind of adding for precise injection molding part, is provided
Work technique, is as follows：Extract raw material, raw material mixing, prepare mold, molding, filling, pressurize, cooling, die sinking, demoulding,
Refine, film；Raw material is extracted, the raw material is mixed according to a certain percentage, pours into feeding machine, by ready mold clamping,
The raw material is injected by feeding machine in the mold and is filled, pressurize processing then is carried out to the mold, is then cooled to
Room temperature opens the mold, and semi-finished product are demoulded out of described mold, carries out refine to the semi-finished product, finally coating protection
Film obtains finished product.
In a preferred embodiment of the present invention, the material composition is high density polyethylene (HDPE) and polyacrylonitrile.
In a preferred embodiment of the present invention, the raw material mixing number is 50-60 parts of high density polyethylene (HDPE), polypropylene
15-20 parts of nitrile.
In a preferred embodiment of the present invention, the filling stage, packing volume are maintained at the mold inner volume
94%~97%。
In a preferred embodiment of the present invention, the packing stage, operating pressure are maintained at 5kg/cm2。
In a preferred embodiment of the present invention, the packing stage, operating temperature are maintained at 125 DEG C ~ 138 DEG C.
The beneficial effects of the invention are as follows：The present invention can optimize moulding production technology, improve production efficiency, improve injection molding
Part precision, while moulding corrosion resistance and anti-aging property are improved, improve service life.
Specific implementation mode
The preferred embodiments of the present invention will be described in detail below so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that so as to make a clearer definition of the protection scope of the present invention.
The embodiment of the present invention includes：
Embodiment 1：A kind of processing technology of precise injection molding part, is as follows：Extract raw material, raw material mixing, prepare mold,
Molding, filling, pressurize, cooling, die sinking, demoulding, refine, film；55 parts of high density polyethylene (HDPE), 18 parts of polyacrylonitrile are extracted, into
Row mixing, pours into feeding machine, by ready mold clamping, the mixture of high density polyethylene (HDPE) and polyacrylonitrile is passed through material feeding
Machine injects filling in mold, and packing volume is the 94% of mold inner volume, then carries out pressurize processing to mold, and dwell pressure is protected
It holds in 5kg/cm2, operating temperature controls at 127 DEG C, keeps 20s, be then cooled to room temperature, opens mold, by semi-finished product from mould
Demoulding in tool carries out refine to semi-finished product, and last coating protective film obtains finished product.
Embodiment 2：50 parts of high density polyethylene (HDPE), 15 parts of polyacrylonitrile are extracted, is mixed, pours into feeding machine, will prepared
The mixture of high density polyethylene (HDPE) and polyacrylonitrile is injected by feeding machine in mold and is filled by good mold clamping, obturator
Product is the 96% of mold inner volume, then carries out pressurize processing to mold, and dwell pressure is maintained at 5kg/cm2, operating temperature control
At 130 DEG C, 20s is kept, is then cooled to room temperature, mold is opened, semi-finished product is demoulded out of mold, essence is carried out to semi-finished product
It repaiies, last coating protective film, obtains finished product.
Embodiment 3：60 parts of high density polyethylene (HDPE), 20 parts of polyacrylonitrile are extracted, is mixed, pours into feeding machine, will prepared
The mixture of high density polyethylene (HDPE) and polyacrylonitrile is injected by feeding machine in mold and is filled by good mold clamping, obturator
Product is the 94% of mold inner volume, then carries out pressurize processing to mold, and dwell pressure is maintained at 5kg/cm2, operating temperature control
At 135 DEG C, 20s is kept, is then cooled to room temperature, mold is opened, semi-finished product is demoulded out of mold, essence is carried out to semi-finished product
It repaiies, last coating protective film, obtains finished product.
Further illustrate, using high density polyethylene (HDPE) and polyacrylonitrile as raw material, be because of high density polyethylene (HDPE) hardness,
Tensile strength and creep properties are better than low density polyethylene (LDPE)；Wearability, electrical insulating property, toughness and cold resistance are preferable；Chemical stability
It is good, at ambient temperature, do not dissolve in any organic solvent, the corrosion of acid and alkali resistance and various salts.And high density polyethylene (HDPE) is smooth
It spends outstanding, the demoulding in later stage is facilitated to handle.And polyacrylonitrile weatherability and sun-resistant property are good, outdoor placement can also after 18 months
Keep the 77% of original intensity.It goes back chemical-resistant reagent, especially inorganic acid, bleaching powder, hydrogen peroxide and general organic reagent.
By the way that polyacrylonitrile is added, the corrosion resistance and anti-aging property of moulding can be greatly improved, service life is improved.
Further illustrate, fill the stage, packing volume is maintained at the 94% ~ 97% of the mold inner volume, packing volume
If too small, the product for being molded acquisition is susceptible to fault of construction, and poor product quality, flaw is more, and performance indicator does not reach requirement.
Packing volume is excessive, then increases the viscosity of moulding in holding stage, screw extruding, and the later stage is not easy to carry out demoulding processing,
Increase production cost simultaneously.According to the difference of raw material ratio, by packing volume be maintained at the mold inner volume 94% ~
97%, while both having can guarantee that moulding realized perfect expansion in pressure maintaining period, while can also control production cost, it is ensured that production
The acceptable performance of product.
It illustrates further, packing stage, operating temperature is maintained at 125 DEG C ~ 138 DEG C.Because high density polyethylene (HDPE) is soft
Change temperature between 120 DEG C ~ 140 DEG C, temperature is controlled at 125 DEG C ~ 138 DEG C, it can be ensured that products material fully merges molding, adds
The molding of fast moulding.
It illustrates further, film is carried out to semi-finished product after demoulding refine, the corrosion resistance of product can be further increased
Product service life can be improved with anti-aging performance.
The present invention can optimize moulding production technology, improve production efficiency, improve moulding precision, while improving note
Plastic corrosion resistance and anti-aging property improve service life.
Example the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (6)
1. a kind of processing technology of precise injection molding part, which is characterized in that be as follows：Raw material is extracted, raw material mixing prepares
Mold, molding, filling, pressurize, cooling, die sinking, demoulding, refine, film；Raw material is extracted, according to a certain percentage by the raw material
Mixing, pours into feeding machine, by ready mold clamping, the raw material is injected by feeding machine in the mold and is filled, with
Pressurize processing is carried out to the mold afterwards, room temperature is then cooled to, opens the mold, semi-finished product are taken off out of described mold
Mould carries out refine to the semi-finished product, and last coating protective film obtains finished product.
2. the processing technology of precise injection molding part according to claim 1, which is characterized in that the material composition is high density
Polyethylene and polyacrylonitrile.
3. the processing technology of precise injection molding part according to claim 1, which is characterized in that the raw material mixing number is height
50-60 parts of density polyethylene, 15-20 parts of polyacrylonitrile.
4. the processing technology of precise injection molding part according to claim 1, which is characterized in that the filling stage, obturator
Product is maintained at the 94% ~ 97% of the mold inner volume.
5. the processing technology of precise injection molding part according to claim 1, which is characterized in that the packing stage, work pressure
Power is maintained at 5kg/cm2。
6. the processing technology of precise injection molding part according to claim 1, which is characterized in that the packing stage, work temperature
Degree is maintained at 125 DEG C ~ 138 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810185961.2A CN108407235A (en) | 2018-03-07 | 2018-03-07 | A kind of processing technology of precise injection molding part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810185961.2A CN108407235A (en) | 2018-03-07 | 2018-03-07 | A kind of processing technology of precise injection molding part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108407235A true CN108407235A (en) | 2018-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810185961.2A Pending CN108407235A (en) | 2018-03-07 | 2018-03-07 | A kind of processing technology of precise injection molding part |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113306079A (en) * | 2021-05-17 | 2021-08-27 | 南京川流精密塑胶科技有限公司 | Machining process for producing high-efficiency precision injection molding piece |
Citations (5)
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|---|---|---|---|---|
| CN103358457A (en) * | 2013-08-05 | 2013-10-23 | 格林精密部件（惠州）有限公司 | Molding process for high-strength injection-molded part |
| CN104194123A (en) * | 2014-09-10 | 2014-12-10 | 黑龙江大学 | Polyacrylonitrile fiber/high-density polyethylene composite material and preparation method thereof |
| CN105922498A (en) * | 2016-05-11 | 2016-09-07 | 李爱冰 | Injection molding technology of glass light guide plate |
| CN106313417A (en) * | 2016-08-18 | 2017-01-11 | 天津华夏联盛汽车部件有限公司 | Injection molding technique for instrument board |
| CN107571448A (en) * | 2016-07-04 | 2018-01-12 | 北京宝景泰克汽车零部件有限公司 | The injection production technology of automobile moulding |
-
2018
- 2018-03-07 CN CN201810185961.2A patent/CN108407235A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103358457A (en) * | 2013-08-05 | 2013-10-23 | 格林精密部件（惠州）有限公司 | Molding process for high-strength injection-molded part |
| CN104194123A (en) * | 2014-09-10 | 2014-12-10 | 黑龙江大学 | Polyacrylonitrile fiber/high-density polyethylene composite material and preparation method thereof |
| CN105922498A (en) * | 2016-05-11 | 2016-09-07 | 李爱冰 | Injection molding technology of glass light guide plate |
| CN107571448A (en) * | 2016-07-04 | 2018-01-12 | 北京宝景泰克汽车零部件有限公司 | The injection production technology of automobile moulding |
| CN106313417A (en) * | 2016-08-18 | 2017-01-11 | 天津华夏联盛汽车部件有限公司 | Injection molding technique for instrument board |
Non-Patent Citations (1)
| Title |
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| 吴智华等: "《高分子材料成型工艺学》", 30 September 2010, 四川大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113306079A (en) * | 2021-05-17 | 2021-08-27 | 南京川流精密塑胶科技有限公司 | Machining process for producing high-efficiency precision injection molding piece |
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Application publication date: 20180817 |