CN106313421A - TPU plastic injection moulding process - Google Patents
TPU plastic injection moulding process Download PDFInfo
- Publication number
- CN106313421A CN106313421A CN201510365290.4A CN201510365290A CN106313421A CN 106313421 A CN106313421 A CN 106313421A CN 201510365290 A CN201510365290 A CN 201510365290A CN 106313421 A CN106313421 A CN 106313421A
- Authority
- CN
- China
- Prior art keywords
- tpu
- temperature
- controls
- injection molding
- screw speed
- 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
- 238000001746 injection moulding Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000005422 blasting Methods 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 230000003031 feeding effect Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000000048 melt cooling Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000009790 rate-determining step (RDS) Methods 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
-
- 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
-
- 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
- B29C45/78—Measuring, controlling or regulating of 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
- B29C2945/76003—Measured parameter
- B29C2945/7604—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
- B29C2945/76003—Measured parameter
- B29C2945/7611—Velocity
- B29C2945/7612—Velocity rotational movement
Abstract
The invention belongs to the technical field of shoe processing and manufacturing and particularly relates to a TPU plastic injection moulding process. The TPU plastic injection moulding process is a discontinuous process divided into three stages, namely pre-plastic-injection, injection and extrusion. The TPU plastic injection moulding process is simple in process, short in moulding cycle and high in yield.
Description
Technical field
The invention belongs to footwear processing and manufacturing technical field, be specifically related to a kind of TPU injection molding process.
Background technology
Along with successfully bidding for 2008 Olympics in Beijing, increasing Chinese start to make earnest efforts the various sports of what, and high performance sport shoes the most just becomes commodity in short supply.As the rubber that continues, the forth generation material for sole of shoe of the Hou of PVC, SBS, TPU has more excellent elasticity, wearability, tear resistance and bendability, is one of high sole preferred material of special purpose shoes such as football boot, ice skates, climbing boot etc. of various requirement.
TPU molding process planning has multiple method: include injection, blowing, compression forming, extrusion molding etc., wherein the most commonly used to be molded.
Summary of the invention
The function of injection is that TPU is processed into required product, and the present invention proposes a kind of TPU injection molding process, is divided into preformed, injection and machine and goes out the digital process of three phases.Concrete technical scheme is as follows:
A kind of TPU injection molding process, including following operation:
1. Design of Dies, mould product shrinkage factor scope be shrinkage factor scope be 0.005 ~ 0.020cm/cm, in mould connect nozzle of injector to sub-runner or one section of passage of die cavity, diameter inwardly expands, and in more than 2 ° angles, water passage surface is processed by shot blasting；
2. temperature controls, and barrel temperature scope used by processing TPU is 177 ~ 232 DEG C；The distribution of barrel temperature is to stop to spray nozzle front end from hopper rear end, gradually rises；Nozzle temperature controls in the range of the maximum temperature of barrel；The mold temperature cooling medium by constant temperature；
3. the time controls, and the molding cycle of TPU controls between 20 ~ 60s according to hardness, product thickness and configuration；
4. screw speed controls, and the screw speed of TPU is generally 20 ~ 80r/min；
5. embedding and injection molding, metal insert is first put into the precalculated position of mould, is then injected into overall goods；Metal insert being carried out the pre-heat treatment, the melt cooling around inserts can be made in injection process relatively slow, shrinkage ratio is more uniform, certain heat material feeding effect occurs, prevents from producing excessive internal stress around inserts；After inserts defat, by it in 200～230 DEG C of heat treated 1.5～2min, peel strength 6～9kg/25mm.
In above-mentioned processing step, described runner can be circular, semicircle, rectangle.
In above-mentioned screw speed rate-determining steps, the screw speed of TPU is preferably controlled in 20 ~ 40r/min.
It is simple that the TPU injection molding process that the present invention proposes has technique, and molding cycle is short, and yield rate is high.
Detailed description of the invention
A kind of TPU injection molding process, including following operation:
1. Design of Dies, mould product shrinkage factor scope be shrinkage factor scope be 0.005 ~ 0.020cm/cm, mould connects nozzle of injector to sub-runner or one section of passage of die cavity, diameter inwardly expands, in more than 2 ° angles, water passage surface is processed by shot blasting, runner can be circular, semicircle, rectangle.
2. temperature controls, and barrel temperature scope used by processing TPU is 177 ~ 232 DEG C；The distribution of barrel temperature is to stop to spray nozzle front end from hopper rear end, gradually rises；Nozzle temperature controls in the range of the maximum temperature of barrel；The mold temperature cooling medium by constant temperature；
3. the time controls, and the molding cycle of TPU controls between 20 ~ 60s according to hardness, product thickness and configuration；
4. screw speed controls, and the screw speed of TPU is generally 20 ~ 40r/min；
5. embedding and injection molding, metal insert is first put into the precalculated position of mould, is then injected into overall goods；Metal insert being carried out the pre-heat treatment, the melt cooling around inserts can be made in injection process relatively slow, shrinkage ratio is more uniform, certain heat material feeding effect occurs, prevents from producing excessive internal stress around inserts；After inserts defat, by it in 200～230 DEG C of heat treated 1.5～2min, peel strength 6～9kg/25mm.
Claims (3)
1. a TPU injection molding process, including following operation:
1. Design of Dies, mould product shrinkage factor scope be shrinkage factor scope be 0.005 ~ 0.020cm/cm, in mould connect nozzle of injector to sub-runner or one section of passage of die cavity, diameter inwardly expands, and in more than 2 ° angles, water passage surface is processed by shot blasting；
2. temperature controls, and barrel temperature scope used by processing TPU is 177 ~ 232 DEG C；The distribution of barrel temperature is to stop to spray nozzle front end from hopper rear end, gradually rises；Nozzle temperature controls in the range of the maximum temperature of barrel；The mold temperature cooling medium by constant temperature；
3. the time controls, and the molding cycle of TPU controls between 20 ~ 60s according to hardness, product thickness and configuration；
4. screw speed controls, and the screw speed of TPU is generally 20 ~ 80r/min；
5. embedding and injection molding, metal insert is first put into the precalculated position of mould, is then injected into overall goods；Metal insert being carried out the pre-heat treatment, the melt cooling around inserts can be made in injection process relatively slow, shrinkage ratio is more uniform, certain heat material feeding effect occurs, prevents from producing excessive internal stress around inserts；After inserts defat, by it in 200～230 DEG C of heat treated 1.5～2min, peel strength 6～9kg/25mm.
2. TPU injection molding process as claimed in claim 1 is characterized in that described runner can be circular, semicircle, rectangle.
3. TPU injection molding process as claimed in claim 1 is characterized in that in described screw speed rate-determining steps, the screw speed of TPU is preferably controlled in 20 ~ 40r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510365290.4A CN106313421A (en) | 2015-06-29 | 2015-06-29 | TPU plastic injection moulding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510365290.4A CN106313421A (en) | 2015-06-29 | 2015-06-29 | TPU plastic injection moulding process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106313421A true CN106313421A (en) | 2017-01-11 |
Family
ID=57721460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510365290.4A Pending CN106313421A (en) | 2015-06-29 | 2015-06-29 | TPU plastic injection moulding process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106313421A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022105074A1 (en) * | 2020-11-17 | 2022-05-27 | 高华文 | Manufacturing process for decorative metal-containing plastic product, product manufactured by process, and shoe |
-
2015
- 2015-06-29 CN CN201510365290.4A patent/CN106313421A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022105074A1 (en) * | 2020-11-17 | 2022-05-27 | 高华文 | Manufacturing process for decorative metal-containing plastic product, product manufactured by process, and shoe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170111 |
|
| WD01 | Invention patent application deemed withdrawn after publication |