CN202572906U - Pulse type cooling system for compact disc injection mould - Google Patents
Pulse type cooling system for compact disc injection mould Download PDFInfo
- Publication number
- CN202572906U CN202572906U CN 201220067110 CN201220067110U CN202572906U CN 202572906 U CN202572906 U CN 202572906U CN 201220067110 CN201220067110 CN 201220067110 CN 201220067110 U CN201220067110 U CN 201220067110U CN 202572906 U CN202572906 U CN 202572906U
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- programmable logic
- logic controller
- mould
- injection
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- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a pulse type cooling system for a compact disc injection mould. The pulse type cooling system comprises a pipeline for cooling the compact disc injection mould, and a control device, wherein the control device comprises a programmable logic controller for accurately controlling the injection mould; the programmable logic controller is connected to a control device of an injection moulding machine so as to obtain a corresponding control signal; and the programmable logic controller is in signal connection with a water inlet solenoid valve and a water outlet solenoid valve. The programmable logic controller obtains a signal of injection moulding action and controls the water inlet solenoid valve and the water outlet solenoid valve of the mould through a sequence control program preprogrammed in the programmable logic controller, so that the conventional mould cooling mode for the compact disc injection moulding machine is changed, the injection moulding speed is greatly accelerated and the forming cycle is shortened under the condition that the quality is optimized, and the production efficiency is improved.
Description
Technical field
The utility model relates to the cooling technology field of cd injection molding machine mould.
Background technology
The PC plastics are heated to 350 deg.c by the shear heat that heating collar and injection screw produce in the injection machine charging basket, to reach the required good flowability of injection moulding.Dwell pressure is the continuity of injection pressure, refluxes and feed supplement in die cavity in order to prevent the hot melt material, and when dwell pressure originates in the injection pressure end, and segmentation progressively reduces and release pressure.Pressurize nozzle is later closed, and running channel blocks, and video disc continues to be cooled to about 110 degree from the high temperature of more than 300 degree, and after the typing, cooling finishes fully, opens mould and by the high speed machine hand disc is taken out, and matched moulds gets into next circulation then.
The plastics of high-temperature fusion are during through colder mould inner surface, and curings that can be cooled more fast of the surface of contact is called " cured layer ", and in mould cavity, continues the plastic layer with the molten condition propelling, is called " fluidized bed ".Between the later zone and the zone of solidifying more earlier of solidifying, the arrangement of the macromolecular chain of plastics can produce certain orientation, and in fact just residual have certain internal stress to gather, and in the quality control of CD, is referred to as " birefringence ".
So in general, injection moulding will reach high quality (hole point replication rate is high) will rely on higher mold surface temperature, with the resistance of minimizing plastic flow, and reduces surperficial uneven cooling and birefringence internal stress that causes or the reduction of cheating the some accuracy of repetition.
But mould Wen Yuegao then also increases the molten plastic cooling and shaping of more than 300 degree high temperature the cool time required to the 110 degree left and right sides accordingly.
Under traditional mode, the mould temperature is to provide the current of lasting steady temperature to control two half modules and running channel, cutting knife respectively by special die heater.The half module temperature generally is controlled at when producing CD about 60 degree, and when producing DVD, need control to about 100 degree.About 110 needed times of degree below the stable vitrification point that is cured to plastics of plastics of the cooling water of 60 degree with more than 300 degree, cool time in 2 seconds of needs at least under existing mould heat transfer boundary condition.
Though traditional die heater can provide relatively static mold temperature control current, regulates easily, the extraneous factor influence is little.But have following shortcoming: can't dynamically control mold temperature, mold temperature is long more high more cool time, costs an arm and a leg, and fault rate is high.
The utility model content
The technical problem that the utility model solved is that the temperature to mould in injection moulding process is controlled dynamically under the situation that guarantees process conditions and cooling water quality.
The technical scheme that the utility model adopts is; Cd injection molding mould pulsed cooling system; Comprise pipeline that the cd injection molding mould is cooled off and the control device that responds fast; Accurately controlled by programmable logic controller (PLC), programmable logic controller (PLC) is connected in the control device acquisition control signal corresponding of injection machine simultaneously.
Programmable logic controller (PLC) is connected with Inlet and outlet water magnetic valve signal, and programmable logic controller (PLC) is obtained the signal of injection moulding action, and controls mould Inlet and outlet water magnetic valve through the sequence control program that weaves in advance in the programmable logic controller (PLC).
FPGA control obtains the various signals that injection moulding is moved from the control device of injection machine, the control cool time of pulsed in each molding cycle, thus obtain dynamic mould temperature control.
Be provided with booster pump before the entering water electromagnetic valve, be communicated with water tank before the booster pump.
The beneficial effect of the utility model is that the utility model is exactly the traditional moulds type of cooling that changes the cd injection molding machine, under the situation of optimizing quality, further improves injection moulding speed, shortens molding cycle, enhances productivity.Utilize control elements such as increasing PLC on the cd injection molding machine; Mode with pulse is controlled mold cooling water, obtains better Forming Quality and molding cycle faster, and the substrate that duplicates has low warpage, depression; Molding cycle reduced to 3.15 seconds from 3.8 seconds, was equivalent to improve the production capacity more than 15%.Adopt the pulse cooling to carry out after the process optimization, mold temperature is reduced 40C cooling is minimized, be 3.15 seconds circulation timei.Radially meet and exceed the level of traditional handicraft fully with the tangential warpage; Tan.dev. radially, tangential warpage＜0.4 °, the performance of the birefringence of outmost turns on different dies is different, especially in the position, outer; Radius＞55mm, but peak also is to be controlled in the standard fully.
Description of drawings
Fig. 1 is the utility model structural representation.
Be labeled as among the figure: 1-water tank, 2-booster pump, 3-entering water electromagnetic valve, 4-backwater magnetic valve, 5-injection mold.
The specific embodiment
The key point of the utility model is, during the filling of die cavity, keeps higher mold surface temperature, is beneficial to and obtains high replication rate, and during filling the cooling and shaping that pressurize finishes, keep lower temperature to be cooled under the vitrification point rapidly.
Thereby the utility model is controlled mold cooling water control Shooting Technique process in a dynamic way.During the open-close module and injection close cooling water between hold period; Be equivalent to die surface can't and cooling water between carry out heat exchange, keep the die surface high-temperature, in fact mold surface temperature is heated to higher during the injection by the plastics of high temperature; The good fluidity of plastics reduces birefringence like this.The cooling water of low temperature (about 20 degree) is opened in the injection pressurize later cool time rapidly, with the rapid cooling and shaping of substrate, reaches the taking-up temperature, thereby optimizes injection molding process, shortens molding cycle.
During the resin of high temperature melting flowed into mould, mould need keep higher temperature, and still mould and substrate all cool down rapidly before substrate takes out.For realizing the open and close of high-precision control cooling water, adopted the PLC programmable logic controller (PLC) to extract process signals such as corresponding open-close module, injection beginning, pressurize end from former injection machine, come accurate control to open and close the time point of cooling water.
The injection machine molding cycle is divided into: matched moulds, and----pressurize--is cooled off--die sinking--manipulator taking-up---matched moulds in injection.
Pulsed cooling system action sequence: the moment that injection finishes is opened the quick cooling of cooling water (20 degree)--next circulation of-entering that the moment quick closedown cooling water that cooling finishes--keeps die surface high temperature--.
Under the injection machine automatic injection moulding pattern; The moment that finish the cool time that injection machine is set in each injection molding cycle (be mould the molten plastic of high temperature is cooled to 110 degree moment of typing fully through mold cooling water with it) is closed mold cooling water by the control of pulsed cooling system; Die sinking then; Manipulator takes out, and matched moulds gets into next molding cycle once more then.So rapidly cooling water is turned off, can be kept the high temperature (far above 60 degree temperature of traditional approach) of die surface in the moment that need not cool off.It is mobile to obtain surface of good when this will help injecting in following one-period, improves accuracy of repetition, reduces birefringence.
Mould closes, injection machine injection device lead-screw are injected the PC plastics of fusion and are filled mould in injection mold, this moment, cooling water was in closed condition, and mold surface temperature is higher can to obtain good condition of molding.Moment in that injection finishes is opened the cooling water magnetic valve rapidly by the PLC control of pulsed cooling system, and the cooling water about spend this moment 20 gets into the mould water channel plastics are cooled.Owing to about low 40 degree of cooling water temperature, will significantly shorten cool time, thereby when improving quality, enhance productivity than traditional approach.
The moment quick closedown cooling water that finishes in cool time, the high temperature of maintenance die surface gets into next circulation then.
This system can be finely tuned time point and opening time that cooling water opens and closes by PLC control, to satisfy the actual needs of different materials or technology.
On the type selecting of PLC, select the high model of response speed simultaneously.On the type selecting of magnetic valve, owing to need response at a high speed, can select 220 volts height response magnetic valve, and realize contactless control with the solid-state relay of import.
Claims (2)
1. cd injection molding mould pulsed cooling system; Comprise pipeline and control device that the cd injection molding mould is cooled off; Control device comprises the programmable logic controller (PLC) that injection mold is accurately controlled, and the control device that programmable logic controller (PLC) is connected in injection machine obtains control signal corresponding; Programmable logic controller (PLC) is connected with Inlet and outlet water magnetic valve signal, and programmable logic controller (PLC) is obtained the signal of injection moulding action, and controls mould Inlet and outlet water magnetic valve through the sequence control program that weaves in advance in the programmable logic controller (PLC).
2. cd injection molding mould pulsed cooling system as claimed in claim 1 is characterized in that: be provided with booster pump (2) before the said entering water electromagnetic valve, be communicated with water tank (1) before the booster pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220067110 CN202572906U (en) | 2012-02-28 | 2012-02-28 | Pulse type cooling system for compact disc injection mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220067110 CN202572906U (en) | 2012-02-28 | 2012-02-28 | Pulse type cooling system for compact disc injection mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202572906U true CN202572906U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220067110 Expired - Fee Related CN202572906U (en) | 2012-02-28 | 2012-02-28 | Pulse type cooling system for compact disc injection mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202572906U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104368773A (en) * | 2014-12-05 | 2015-02-25 | 西南铝业（集团）有限责任公司 | Hard aluminum alloy casting crystallizer and pulse water pipeline thereof |
-
2012
- 2012-02-28 CN CN 201220067110 patent/CN202572906U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104368773A (en) * | 2014-12-05 | 2015-02-25 | 西南铝业（集团）有限责任公司 | Hard aluminum alloy casting crystallizer and pulse water pipeline thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20130228 |