CN107053577A - A kind of precise injection molding method - Google Patents
A kind of precise injection molding method Download PDFInfo
- Publication number
- CN107053577A CN107053577A CN201710412829.6A CN201710412829A CN107053577A CN 107053577 A CN107053577 A CN 107053577A CN 201710412829 A CN201710412829 A CN 201710412829A CN 107053577 A CN107053577 A CN 107053577A
- Authority
- CN
- China
- Prior art keywords
- polymer
- injection molding
- molding method
- precise injection
- moulding article
- 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.)
- Pending
Links
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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
- B29C33/60—Releasing, lubricating or separating agents
- B29C33/62—Releasing, lubricating or separating agents based on polymers or oligomers
- B29C33/64—Silicone
-
- 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
- B29C45/1769—Handling of moulded articles or runners, e.g. sorting, stacking, grinding of runners
-
- 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
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention provides a kind of precise injection molding method, the present invention is after the completion of injection, first cool down mould, there are many remaining internal stress to discharge in moulding article, by being again heated to below melting point polymer 12 18 DEG C, then cool down, apply ultrasonic wave simultaneously, so that residual mechanical stress is dispersed and obtains most of release, the stability of moulding article is improved, buckling deformation is reduced；8 12 DEG C are heated to below softening point in vacuum environment after taking-up, and because vacuum environment does not have the obstruction of pressure, remaining internal stress is fully discharged, and buckling deformation can be completely eliminated substantially.The releasing agent of the present invention adds nano silicon, improves release property, improves ageing resistance, the wearability on Wood-plastic material surface.
Description
Technical field
The present invention relates to injection molding technology field, more particularly to a kind of precise injection molding method.
Background technology
In injection molding process, polymer melt is filled into mold cavity by flow passage system, is cooled down in die cavity straight
To solidifying, then eject.In the process, polymer is from fluid state to solid state, and its mechanical behavior there occurs quickly
Change.These changes cause to form different degrees of residual stress in injection moulded products, and ultimately result in its buckling deformation.Except sticking up
Song deformation is outer, and residual stress can also have a negative impact to outward appearance, mechanical property and optical property of product etc..
The buckling deformation of injection can be improved by adjusting the dwell pressure being molded, temperature, speed, but for accurate portion
Perfect condition can not be fully achieved, it is necessary to further improve injection molding technology in part.
The content of the invention
The object of the invention is exactly that there is provided a kind of precise injection molding method in order to make up the defect of prior art.
The present invention is achieved by the following technical solutions：
A kind of precise injection molding method, step is：
（1）Mould is made, in one layer of releasing agent of mould cavity internal coat；
（2）Polymer is heated to molten condition；
（3）The polymer of the melting is squeezed into mold cavity, moulding article is obtained；
（4）Cool down mould so that polymer is fully cured, be again heated to below melting point polymer 12-18 DEG C, apply ultrasonic wave,
Carry out being cooled to solidification again, take out moulding article；
（5）Moulding article is put into vacuum environment, 8-12 DEG C is heated to below polymer softening point, 2-3 minutes are incubated, it is cold
But, produce.
The polymer is Acrylonitrile-butadiene-styrene Copolymer, high-crystallinity polypropylene, ethene-propylene copolymerization
One or more in thing.
Apply ultrasonic wave in top to bottom, left and right, front and rear.
Application sonication times are 40-60s.
The releasing agent by following percentage by weight material composition：
Soybean emulsification honey 6-8%；
Dimethyl silicone polymer 0.5-0.7%；
Gelatin 1-1.5%；
Nano silicon 3-3.5%
Petroleum ether surplus.
It is an advantage of the invention that：The present invention is after the completion of injection, and first cooling down has many remaining planted agents in mould, moulding article
Power cannot discharge, and by being again heated to below melting point polymer 12-18 DEG C, then cool down, while applying ultrasonic wave so that remaining
Stress is dispersed and obtains most of release, improves the stability of moulding article, reduces buckling deformation；In vacuum after taking-up
8-12 DEG C is heated to below softening point in environment, and because vacuum environment does not have the obstruction of pressure, remaining internal stress is fully released
Put, buckling deformation can be completely eliminated substantially.The releasing agent of the present invention adds nano silicon, improves release property, carries
High ageing resistance, the wearability on Wood-plastic material surface.
Embodiment
A kind of precise injection molding method, step is：
（1）Mould is made, in one layer of releasing agent of mould cavity internal coat；
（2）Polymer is heated to molten condition；
（3）The polymer of the melting is squeezed into mold cavity, moulding article is obtained；
（4）Cool down mould so that polymer is fully cured, be again heated to below melting point polymer 15 DEG C, apply ultrasonic wave, then enter
Row is cooled to solidification, takes out moulding article；
（5）Moulding article is put into vacuum environment, 9 DEG C are heated to below polymer softening point, 2 minutes are incubated, cooling, i.e.,
.
The polymer is Acrylonitrile-butadiene-styrene Copolymer.
Apply ultrasonic wave in top to bottom, left and right, front and rear.
Application sonication times are 50s.
The releasing agent by following percentage by weight material composition：
Soybean emulsification honey 7%；
Dimethyl silicone polymer 0.6%；
Gelatin 1.3%；
Nano silicon 3.3%
Petroleum ether surplus.
Claims (5)
1. a kind of precise injection molding method, it is characterised in that step is：
（1）Mould is made, in one layer of releasing agent of mould cavity internal coat；
（2）Polymer is heated to molten condition；
（3）The polymer of the melting is squeezed into mold cavity, moulding article is obtained；
（4）Cool down mould so that polymer is fully cured, be again heated to below melting point polymer 12-18 DEG C, apply ultrasonic wave,
Carry out being cooled to solidification again, take out moulding article；
（5）Moulding article is put into vacuum environment, 8-12 DEG C is heated to below polymer softening point, 2-3 minutes are incubated, it is cold
But, produce.
2. precise injection molding method as claimed in claim 1, it is characterised in that the polymer is acrylonitrile-butadiene-benzene second
One or more in alkene copolymer, high-crystallinity polypropylene, ethene-propylene copolymer.
3. precise injection molding method as claimed in claim 1, it is characterised in that apply ultrasonic wave in top to bottom, left and right, front and rear.
4. precise injection molding method as claimed in claim 1, it is characterised in that application sonication times are 40-60s.
5. precise injection molding method as claimed in claim 1, it is characterised in that the releasing agent by following percentage by weight material
Composition：
Soybean emulsification honey 6-8%；
Dimethyl silicone polymer 0.5-0.7%；
Gelatin 1-1.5%；
Nano silicon 3-3.5%
Petroleum ether surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710412829.6A CN107053577A (en) | 2017-06-05 | 2017-06-05 | A kind of precise injection molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710412829.6A CN107053577A (en) | 2017-06-05 | 2017-06-05 | A kind of precise injection molding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107053577A true CN107053577A (en) | 2017-08-18 |
Family
ID=59615895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710412829.6A Pending CN107053577A (en) | 2017-06-05 | 2017-06-05 | A kind of precise injection molding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107053577A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107825654A (en) * | 2017-11-10 | 2018-03-23 | 扬州市维拉园艺有限公司 | The production method and wood moulding flowerpot of a kind of wood moulding flowerpot |
| CN108044862A (en) * | 2017-10-23 | 2018-05-18 | 深圳市振云精密测试设备有限公司 | A kind of polyamidoimide forming method |
| CN109049706A (en) * | 2018-10-08 | 2018-12-21 | 南京航空航天大学 | A method of the raising 3D printing macromolecule device mechanical performance based on ultrasonic vibration |
| CN115746345A (en) * | 2022-08-22 | 2023-03-07 | 四川大学 | Method for eliminating residual stress of polymer processing and warping of product |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102700070A (en) * | 2012-05-31 | 2012-10-03 | 昆山拓安塑料制品有限公司 | Deformation reducing and uniformly cooling injection mold for long and thin handles and production process |
| CN102950762A (en) * | 2011-08-23 | 2013-03-06 | 鸿富锦精密工业（深圳）有限公司 | Light guide plate warping correction method, and device thereof |
| CN104582940A (en) * | 2012-08-22 | 2015-04-29 | 夏普株式会社 | Annealing method, annealing jig and annealing apparatus |
-
2017
- 2017-06-05 CN CN201710412829.6A patent/CN107053577A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102950762A (en) * | 2011-08-23 | 2013-03-06 | 鸿富锦精密工业（深圳）有限公司 | Light guide plate warping correction method, and device thereof |
| CN102700070A (en) * | 2012-05-31 | 2012-10-03 | 昆山拓安塑料制品有限公司 | Deformation reducing and uniformly cooling injection mold for long and thin handles and production process |
| CN104582940A (en) * | 2012-08-22 | 2015-04-29 | 夏普株式会社 | Annealing method, annealing jig and annealing apparatus |
Non-Patent Citations (2)
| Title |
|---|
| 沈新元: "《高分子材料加工原理（第2版）》", 31 March 2009, 中国纺织出版社 * |
| 王德中: "《环氧树脂生产与应用》", 30 June 2001, 化学工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108044862A (en) * | 2017-10-23 | 2018-05-18 | 深圳市振云精密测试设备有限公司 | A kind of polyamidoimide forming method |
| CN107825654A (en) * | 2017-11-10 | 2018-03-23 | 扬州市维拉园艺有限公司 | The production method and wood moulding flowerpot of a kind of wood moulding flowerpot |
| CN109049706A (en) * | 2018-10-08 | 2018-12-21 | 南京航空航天大学 | A method of the raising 3D printing macromolecule device mechanical performance based on ultrasonic vibration |
| CN115746345A (en) * | 2022-08-22 | 2023-03-07 | 四川大学 | Method for eliminating residual stress of polymer processing and warping of product |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170818 |
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| RJ01 | Rejection of invention patent application after publication |