CN101112786B - Exhaust system - Google Patents
Exhaust system Download PDFInfo
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- CN101112786B CN101112786B CN200610036827A CN200610036827A CN101112786B CN 101112786 B CN101112786 B CN 101112786B CN 200610036827 A CN200610036827 A CN 200610036827A CN 200610036827 A CN200610036827 A CN 200610036827A CN 101112786 B CN101112786 B CN 101112786B
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- control module
- control valve
- module
- control
- exhaust
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Abstract
The invention discloses an air discharge device for a micro-hole froth injection forming (mucell) machine. The micro-hole froth injection forming machine is connected with a forming machine; the air discharge device mainly includes a control module and an air discharge module; one end of the control module is connected with a die by a limit switch; the control module includes a delay control unit and an air discharge control unit which are connected with a first control valve; the delay control unit is used for emitting a delay signal and the air discharge control unit is used for receiving the delay signal, controlling the openness and closeness of the first control valve; the air discharge module is connected with the other end of the control module by the first control valve; the air discharge module includes a vacuum air storage tank and a vacuum pump connected with the vacuum air storage tank; the vacuum pump is used for pumping the vacuum air storage tank. The air discharge device of the invention can discharge the air in the die, thus obtaining good weight reduction and effective warp reduction in the forming process.
Description
Technical field
The present invention relates to a kind of exhaust apparatus, relate in particular to a kind of exhaust apparatus that is used for microporous foam injection moulding (mucell) equipment.
Background technology
In traditional structure foam injection molding, adopt CBA usually, because the blow pressure of its generation is lower, the product of production is restricted at wall thickness and vpg connection.And postcritical inert gas (CO is adopted in microporous foam injection moulding (mucell)
2, N
2) as physical blowing agent. in whole polymer, form much be evenly distributed, the micro air bubble of consistent size.
The microporous foam injection molding technology huge ability that other Shooting Technique did not have before the breakthrough on the injection molding technology provides for injection-molded item production is for novel product designs, optimizes technology and reduces product cost and opened up new approach.Adopt the injection-molded item of microporous foam injection molding technology just being used to many task industries field, in industry-by-industries such as automobile, medicine, electronics, packaging for foodstuff.
At present in the process of mould molding finished product, also begin with above-mentioned microporous foam injection molding technology, promptly be in the plastics with fusion in the gas importing make-up machine of supercriticality, in the plastics of this fusion inject the die cavity of mould, variation along with pressure, gas in the glue expands thereupon, make the weight of finished product alleviate thereupon, but because the restriction of the used mould of the product structure of institute's moulding or shaped article, be stranded gas to such an extent as to produce in the mould, and having under the situation of tired gas, the gas of this supercriticality is difficult to form in the plastics of fusion and is evenly distributed, the micro-bubble of consistent size, and need use bigger injection pressure when making moulding, just can cram die cavity, thereby influence the loss of weight of finished product and strengthen the degree of warpage, make the fraction defective of finished product increase.
Summary of the invention
In view of the above problems, the present invention has disclosed a kind of exhaust apparatus, to improve the situation that is unfavorable for loss of weight and warpage in the microporous foam process of injection molding.
In order to achieve the above object, the present invention has adopted following technical scheme: a kind of exhaust apparatus, it is used for microporous foam injection moulding (mucell) equipment, this microporous foam injection forming equipment with nonflammable gas (as CO
2, N
2Deng) be injected in the gun barrel of a make-up machine, forming a lot of fine and minute bubbles of being evenly distributed in the polymer of fusion, and this exhaust apparatus mainly comprises a control module and an exhaust module.
Wherein, this control module one end links to each other with a mould by a limit switch, and its other end and one first control valve join, and this control module comprises the control module of delaying time, in order to send an inhibit signal; And an exhaust control module, in order to receive this inhibit signal, to control the switch of this first control valve.
In addition, this exhaust module links to each other with this control module other end by this first control valve, and this exhaust module comprises a vacuum air reservoir and the vavuum pump that links to each other with this vacuum air reservoir, and this vavuum pump can be bled to keep the vacuum of this vacuum air reservoir from this vacuum air reservoir endlessly.
Preferable, the present invention has disclosed a kind of exhaust apparatus, wherein, this exhaust apparatus also comprises a high-pressure air source and one second control valve, this second control valve, one end and this high-pressure air source are joined, its other end links to each other with this control module and can open or close under this control module control, and this second control valve also links to each other with this mould by a limit switch, with after the mould die sinking, gases at high pressure in this high-pressure air source are directed in the mould and with the oil gas of steam vent drain, and this control module is a programmable logic controller (PLC).
Exhaust apparatus of the present invention is discharged the tired gas in the die cavity in the mould molding finished product process, makes this die cavity state that is evacuated, and is beneficial to the loss of weight of shaping finished product and reduces warpage.
Description of drawings
Fig. 1 is the present invention's functional block diagram
Fig. 2 is the schematic diagram of one of the present invention specific embodiment
The specific embodiment
The present invention will be described below in conjunction with accompanying drawing.
Please refer to Figure 1 and Figure 2, described exhaust apparatus is installed on the make-up machine 50, and be integrated in the mould 60, the gun barrel of this make-up machine 50 also connects with a microporous foam injection forming equipment 40, and this microporous foam injection forming equipment 40 passes through nonflammable gas (as CO
2, N
2Deng) heat or be pressurized to supercriticality, supercritical fluid syringe through which is provided with is injected in the gun barrel of this make-up machine 50 then, gas can be mixed into single shape mutually with the plastics of fusion in gun barrel, and when this molten plastic is injected into die cavity in the mould 60, in order to form a large amount of gas nuclears in molten plastic, pressure needs rapidly and declines to a great extent, and formation is evenly distributed, the micro-bubble of consistent size, thereby form the micropore of finished product inside, reach the purpose of finished product loss of weight.
Described exhaust apparatus mainly comprises a control module 10, one first control valves 301 and an exhaust module 20.These first control valve, 301 1 ends and this exhaust module 20 connect, its other end links to each other with this control module 10, again, this first control valve 301 also links to each other with this mould 60 by a limit switch 303, and this limit switch 303 is connected in this control module 10, and is subjected to opening or matched moulds and be the state of opening or closing of this mould 60.
Wherein, this control module 10 can be a logic controller (programmable logiccontroller able to programme, be called for short PLC), and it has time-delay control function, folding situation at this first control valve 301 of time inner control that presets, that is the folding of this first control valve 301 of certain hour inner control behind these mould 60 matched moulds, and this control module 10 comprises a time-delay control module 101 and an exhaust control module 102.
In addition, this exhaust module 20 comprises a vavuum pump 202 and a vacuum air reservoir 201 that is connected with this vavuum pump 202, this vavuum pump 202 is under the situation of power supply power supply, and in the operation of whole exhaust apparatus, extract the gas in this vacuum air reservoir 201 continuously, make the vacuum in this vacuum air reservoir 201 very high, and its gas pressure is far below atmospheric pressure, because gas pressure balancing relation, when this first control valve 301 1 is opened, impel the tired gas in mould 60 die cavitys to advance toward this vacuum air reservoir 201 fast, up to reaching pressure balance, thereby be stranded the gas in this die cavity when discharging the shaping finished product process, make moulding not need bigger injection pressure can cram die cavity.
In the process that reality is implemented, 202 in this vacuum air reservoir 201 and this vavuum pump also are equiped with a pressure inductor 206, go to judge the actual operation situation of this vacuum air reservoir 201 and this vavuum pump 202 in order to pressure sensor, in addition, one deduster 204 and an oil water separator 205 also are set between this vacuum air reservoir 201 and this vavuum pump 202, these equipment mould 60 is carried out exhaust promptly this vacuum exhaust groove 201 with the gas suction tank in mould 60 die cavitys in the time gas separated with the profit that comes with gas, and the dirt slag that absorption is come is removed.
Moreover exhaust apparatus of the present invention also comprises second control valve 302 that a high-pressure air source 70 and is attached thereto, and in practical operation, also is provided with an oil water separator 701 between this high-pressure air source 70 and this second control valve 302.
Please refer to shown in Figure 2, when mould 60 matched moulds, described limit switch 303 closures, because this limit switch 303 electrically connects by this mould 60 and this make-up machine 50, so produce a current signal, this signal is passed to this control module 10 via this limit switch 303, pass to time-delay control module 101 1 time delay commands in it by this control module 10 again, and it receives the order of making Time Delay Opening first control valve 301 after this instruction, after the time of these time-delay control module 101 predetermined time-delays arrives, this scheduled time can be preestablished according to actual needs by the user, 101 of this time-delay control modules can send a signal and give this exhaust control module 102, this exhaust control module 102 sends an instruction of opening this first control valve 301 immediately, so, this first control valve 301 is opened, because what this vacuum air reservoir 201 continued bleeds via this vavuum pump 202, vacuum in it is very high, when this first control valve 301 1 is opened, because the cause of air pressure balance, tired gas in this mould 60 advances toward this vacuum air reservoir 201 very fast, up to pressure balance or injection release, thereby the tired gas in this mould is discharged, and after the nonflammable gas with this microporous foam injection forming equipment 40 injects gun barrel, enter in the die cavity of mould 60 via gun barrel again, because the tired gas in the die cavity is discharged from, under vacuum state, then these gases are mixed in the molten plastic, form easily and be evenly distributed, the micro-bubble of consistent size, and do not need bigger injection pressure can cram die cavity, effectively reduce warpage.
Otherwise, after these mould 60 die sinkings, because this limit switch 303 is opened, this make-up machine 50 begins to cool down processing procedure, and pass a current signal back and give this exhaust apparatus, then this exhaust apparatus stops exhaust, send an instruction by the exhaust control module 102 of control module 10 and close this first control valve 301, open this second control valve 302 simultaneously, because air pressure balance relation, the gases at high pressure of this high-pressure air source 70 enter in this mould 60, utilize these gases at high pressure to remove the oil gas of mould 60 inner vents, make this steam vent be unlikely to stop up.
Claims (4)
1. exhaust apparatus, it is used for a microporous foam injection forming equipment, and this a microporous foam injection forming equipment and a make-up machine connect, and this exhaust apparatus mainly comprises:
One control module, the one end links to each other with a mould by a limit switch, and its other end and one first control valve join, and this control module comprises:
One time-delay control module is in order to send an inhibit signal; And
One exhaust control module is in order to receive this inhibit signal, to control the switch of this first control valve; And
One exhaust module, it links to each other with this control module other end by this first control valve, and this exhaust module comprises a vacuum air reservoir and the vavuum pump that links to each other with this vacuum air reservoir.
2. exhaust apparatus according to claim 1 is characterized in that, this control module is a programmable logic controller (PLC).
3. exhaust apparatus according to claim 1 is characterized in that, this exhaust apparatus also comprises a high-pressure air source and one second control valve.
4. exhaust apparatus according to claim 3 is characterized in that, this second control valve, one end is connected in this high-pressure air source, and its other end then joins with this control module, and this second control valve also links to each other with this mould by this limit switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610036827A CN101112786B (en) | 2006-07-28 | 2006-07-28 | Exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610036827A CN101112786B (en) | 2006-07-28 | 2006-07-28 | Exhaust system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101112786A CN101112786A (en) | 2008-01-30 |
| CN101112786B true CN101112786B (en) | 2010-05-26 |
Family
ID=39021394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610036827A Expired - Fee Related CN101112786B (en) | 2006-07-28 | 2006-07-28 | Exhaust system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101112786B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101391481B (en) * | 2008-10-30 | 2010-06-02 | 南京华格电汽塑业有限公司 | Delay control system for mold hot flow channel |
| CN101963794B (en) * | 2009-07-21 | 2013-09-04 | 康准电子科技（昆山）有限公司 | Film vacuum adhering control method |
| CN103465359B (en) * | 2013-09-18 | 2015-12-02 | 黎永健 | A kind of ceramic press mould vacuum exhaust and dust arrester |
| CN107364089A (en) * | 2017-08-31 | 2017-11-21 | 苏州惠华电子科技有限公司 | Plastic-injection method is vacuumized based on temperature-compensating |
| CN109774085B (en) * | 2019-01-31 | 2020-12-04 | 贵州省材料产业技术研究院 | Pressure and temperature control device for mold cavity |
| CN111037861A (en) * | 2019-12-12 | 2020-04-21 | 谢志康 | Plastic part heat pressure maintaining equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5022457A (en) * | 1988-01-30 | 1991-06-11 | Toshiba Machine Co., Ltd. | Casting control system of die cast machine |
-
2006
- 2006-07-28 CN CN200610036827A patent/CN101112786B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5022457A (en) * | 1988-01-30 | 1991-06-11 | Toshiba Machine Co., Ltd. | Casting control system of die cast machine |
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| Publication number | Publication date |
|---|---|
| CN101112786A (en) | 2008-01-30 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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Granted publication date: 20100526 Termination date: 20110728 |