CN100509347C - Thermoplastic plastic injecting and extruding process - Google Patents
Thermoplastic plastic injecting and extruding process Download PDFInfo
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- CN100509347C CN100509347C CNB2007100695320A CN200710069532A CN100509347C CN 100509347 C CN100509347 C CN 100509347C CN B2007100695320 A CNB2007100695320 A CN B2007100695320A CN 200710069532 A CN200710069532 A CN 200710069532A CN 100509347 C CN100509347 C CN 100509347C
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Abstract
The thermoplastic plastic injecting and extruding process has the injecting operation and extruding operation completed in one identical injecting and extruding machine. It includes the following six steps: installing the extruding oil cylinder on the movable mold plate and to align to the material injecting cylinder; installing the injecting and extruding mold between the extruding oil cylinder and the static mold plate; installing independent oil path for the extruding oil cylinder; installing knock pin in the hollow piston part of the extruding oil cylinder and opening slot in the oil cylinder cover for setting the push iron; matching molds, starting the extruding oil cylinder to extrude; premolding, cooling, unloading mold and pushing out the product to complete one forming period. The present invention has high automation, high product precision, high apparatus utilization rate, low production cost and other advantages.
Description
Technical field
The present invention relates to the processing technology of thermoplastic articles, particularly in same injection (mo(u)lding) machine, finish injection moulding and two actions of extruding, products obtained therefrom precision height, the thermoplastic plastic injecting and extruding process that internal stress is little, optical condition is good.
Background technology
In the past, thermoplastic articles only relied on single injection moulding action to finish the processing of goods on an injection (mo(u)lding) machine.It is not high to exist machining accuracy, and internal stress is big, and the defective of optical condition difference can only be processed general thermoplastic articles.But overcome the plastic spectacle lens of eye illness for relating to being used to correct defects of vision, then product requirements is just very high.The refractive index that requires eyeglass is greater than 1.523 of glass, and the refractive index of general thermosetting plastics cast lenses also has only 1.49～1.50.At present, existing in the world with this thermoplastic replacement of Merlon thermosetting plastics making lens, because the optical index of poly-carbon ester ester lens reaches 1.586, surpass the refractive index of glass, therefore also be that optical lens is in fashion the main cause in the world from now on.But the production polycarbonate ophthalmic lenses must further improve automatization level, reduces manufacturing cost, is the development trend of developing polycarbonate ophthalmic lenses or other high-precision optical goods from now on.Make a general survey of the manufacturer of production polycarbonate ophthalmic lenses in the world, though also begin to adopt the injection compression multimode cavity method of forming, but need to adopt special device just can carry out, and this special equipment structure and technology are all very complicated, cost is very expensive, thereby also becomes the bottleneck in China's large-scale promotion polycarbonate ophthalmic lenses.
Summary of the invention
The objective of the invention is provides a kind of thermoplastic plastic injecting and extruding process of novelty at above-mentioned defective.Not only improve the automation level of processing but also reduce manufacturing cost, process high accuracy, internal stress is little, optical condition is good optical articles.
Technical scheme of the present invention is a thermoplastic plastic injecting and extruding process, operates on same plastic-injection moulding machine, it is characterized in that:
The first step is installed in extrusion oil cylinder on the moving platen of plastic-injection moulding machine and injection barrel centering;
Second step was installed in injection forming mold between the extrusion oil cylinder and quiet template on the make-up machine;
The 3rd step is extrusion oil cylinder oil circuit of independent installation on the make-up machine oil circuit;
The 4th step was installed knock-pin at the piston hollow space of extrusion oil cylinder, and the oil cylinder loam cake has the elongated slot of placing top iron;
The 5th step was finished the injection forming mold mould assembling action on injection (mo(u)lding) machine, the start injection action, then before the plastics of fusion are full of mold cavity fully, start extrusion oil cylinder, make piston promote top iron, it is close until eliminating compression ratio to the moving platen bottom that top iron promotes the punch insert movable component again, finishes the extruding action; Said compression ratio is that the upper plate of injection forming mold equates with the height of top block with lower roof plate height sum, and then this moment, compression ratio was zero, and this moment, the spacing of die plate insert and punch insert was the actual volume of plastic products; Last lower roof plate height sum then has compression ratio less than the top block height;
The 6th step was preformed, cooling, die sinking, and when action was return in extruding, the extrusion oil cylinder piston was return, and the punch movable component is return the home position under the effect of back-moving spring, eject to take off material, finishes an injection moulding cycle.
Extrusion oil cylinder and moving platen are made an integral body in the said first step; Change in said the 5th step and go up lower roof plate height sum or change the top block height, regulate compression ratio.
The free working time poor and extrusion oil cylinder of extruding action in said the 5th step and action of injection is regulated by magnetic valve.
Advantage of the present invention is: 1, finish injection moulding on same injection (mo(u)lding) machine and push two actions, products obtained therefrom precision height, internal stress is little, optical condition good; 2, this injection forming mold promptly is common injection forming mold when its compression ratio is zero, and is can a mould dual-purpose; When 3, plastic-injection moulding machine is closed the advance and retreat operation program of extrusion oil cylinder, promptly be common plastic-injection moulding machine, but also dual-use.Improve the utilization rate of injection forming mold and plastic-injection moulding machine, thereby also greatly reduced the cost of device fabrication.
Description of drawings
Fig. 1 is an injection (mo(u)lding) machine structural representation among the present invention.
Fig. 2 is asphalt principle figure in the injection (mo(u)lding) machine.
Fig. 3 is the injection forming mold cutaway view.
Fig. 4 is Fig. 3 side sectional view.
Fig. 5 is an extrusion oil cylinder structure cutaway view.
Among Fig. 1: 1-hydraulic electric control system, 2-preformed injecting systems, 3-matched moulds ejection system, 4-secondary matched moulds system, 5-secondary matched moulds mould, 6-moving platen, the quiet template of 7-.
Among Fig. 2: D1 oil pump, D2 oil pump, 1-1 matched moulds, 1-2 eject, 3-preformed, 4-injection, 5-injection seat, 6-extrusion oil cylinder.
Among Fig. 3: 501-spring, 502-material discharging rod, 503-jacking block, 504-bolt, 505-punch insert, 506 injecting heads, 507-bolt, 508-die plate insert, 509-bolt, 510-charging ram.
Among Fig. 4: 511-guide pin bushing, 512-guide pillar, the quiet template of 513-, 514-alignment pin, the quiet mould backplate of 515-, 516, lower roof plate, 517-bolt, 518-upper plate, 519-bolt, 520-moving platen, 521-top block, 522-bolt, 523-upper push-rod plate, 524-lower push-rod plate, 525-bottom seat pad, 526-bolt, 527-base plate.
Among Fig. 5: 601-oil cylinder loam cake, 602-top iron, 603-cylinder body, 604-elongated slot, 605-piston, 606-oil cylinder lower cover.
The specific embodiment
Further specify embodiment below in conjunction with accompanying drawing.
With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5.As on injection (mo(u)lding) machine, finishing the polycarbonate ophthalmic lenses process, then at first the extrusion oil cylinder (see figure 5) is installed on the moving platen 6 of injection (mo(u)lding) machine and injection barrel centering, can make an integral body to extrusion oil cylinder and moving platen, then injection forming mold (structure is seen Fig. 3, Fig. 4) is installed between the extrusion oil cylinder and quiet template 7 on the injection (mo(u)lding) machine; An extrusion oil cylinder oil circuit (asphalt principle figure sees 1-6 among Fig. 2) independently is installed on the oil circuit of injection (mo(u)lding) machine again; At piston 605 hollow spaces of extrusion oil cylinder knock-pin is installed again, is had elongated slot 604 on the oil cylinder loam cake 601, top iron 602 is placed in the elongated slot 604.The 5th step is to finish the injection forming mold mould assembling action on injection (mo(u)lding) machine, the start injection action, then before the plastics of fusion are full of mold cavity fully, start extrusion oil cylinder, make piston 605 promote top iron 602, it is close until eliminating compression ratio to moving platen 6 bottoms that top iron 602 promotes punch insert 505 movable components again, finish the extruding action, the 6th step is a preformed, cooling, die sinking, when action was return in extruding, extrusion oil cylinder piston 605 was return, and the punch insert movable component is return the home position under the effect of back-moving spring 501, eject and take off material, finish an injection moulding cycle.At this GPRS compression ratio is adjustable, that is to say in the 5th step, the upper plate 518 of injection moulding, mould highly equates with top block 521 that with lower roof plate 516 height sums then compression ratio is zero, and this moment, die plate insert 508 was exactly the actual volume of plastic products with the spacing of punch insert 505.The height sum of lower roof plate or change top block height just can be regulated compression ratio in the change.Being also noted that the time difference of grasping extruding action and action of injection here, and the working time of extrusion oil cylinder, can regulate by magnetic valve.Among Fig. 1, when action of injection finishes, after changing the pressurize action over to, mobile moving platen 6 is close with quiet template 7 forward, secondary die cylinder just extrusion oil cylinder begins action promotion dynamic model fuse, to the recompression of the melting plastics in the mold cavity, to the influence of molecularly oriented, reduce the internal stress of goods when reducing injection.The effect of hydraulic electric control device 1 is because of injection moulding is plastics melting, mould closure, is injected into the continuous flow procedure that operations such as mould, pressure keep, goods solidify setting, goods are taken out in die sinking are formed.1 in hydraulic electric control device is that this operation of assurance is carried out work like clockwork by pre-provisioning request (pressure, speed, temperature, time) and operation program.The 2 main effects of preformed injection device are to make plastics plastify into the melting state equably, and with enough pressure and speed a certain amount of melt are expelled in the die cavity.The 3 main effects of matched moulds liftout attachment are to guarantee the reliable closure of shaping dies and realize the mould switching motion, also are the workpiece of moulding goods.This technology can be widely used in the production of high accuracy plastic products such as moulding plastics optical lens, compact disc and thin-walled plastic.
Claims (3)
1, thermoplastic plastic injecting and extruding process operates on same plastic-injection moulding machine, it is characterized in that:
The first step is installed in extrusion oil cylinder on the moving platen of plastic-injection moulding machine and injection barrel centering;
Second step was installed in injection forming mold between the extrusion oil cylinder and quiet template on the make-up machine;
The 3rd step is extrusion oil cylinder oil circuit of independent installation on the make-up machine oil circuit;
The 4th step was installed knock-pin at the piston hollow space of extrusion oil cylinder, and the oil cylinder loam cake has the elongated slot of placing top iron;
The 5th step was finished the injection forming mold mould assembling action on injection (mo(u)lding) machine, the start injection action, then before the plastics of fusion are full of mold cavity fully, start extrusion oil cylinder, make piston promote top iron, it is close until eliminating compression ratio to the moving platen bottom that top iron promotes the punch insert movable component again, finishes the extruding action; Said compression ratio is that the upper plate of injection forming mold equates with the height of top block with lower roof plate height sum, and then this moment, compression ratio was zero, and this moment, the spacing of die plate insert and punch insert was the actual volume of plastic products; Last lower roof plate height sum then has compression ratio less than the top block height;
The 6th step was preformed, cooling, die sinking, and when action was return in extruding, the extrusion oil cylinder piston was return, and the punch movable component is return the home position under the effect of back-moving spring, eject to take off material, finishes an injection moulding cycle.
2,, it is characterized in that extrusion oil cylinder and moving platen are made an integral body in the said first step according to the said thermoplastic plastic injecting and extruding process of claim 1; Change in said the 5th step and go up lower roof plate height sum or change the top block height, regulate compression ratio.
3,, it is characterized in that extruding action and the free working time poor and extrusion oil cylinder of action of injection in said the 5th step regulated by magnetic valve according to claim 1 or 2 said thermoplastic plastic injecting and extruding process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100695320A CN100509347C (en) | 2007-07-10 | 2007-07-10 | Thermoplastic plastic injecting and extruding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100695320A CN100509347C (en) | 2007-07-10 | 2007-07-10 | Thermoplastic plastic injecting and extruding process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101088739A CN101088739A (en) | 2007-12-19 |
| CN100509347C true CN100509347C (en) | 2009-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100695320A Expired - Fee Related CN100509347C (en) | 2007-07-10 | 2007-07-10 | Thermoplastic plastic injecting and extruding process |
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| Country | Link |
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| CN (1) | CN100509347C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105141078B (en) * | 2015-07-22 | 2017-11-03 | 郎溪亚博磁电科技有限公司 | Magnetic machines rotor magnetic field injection molding apparatus |
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- 2007-07-10 CN CNB2007100695320A patent/CN100509347C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101088739A (en) | 2007-12-19 |
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Granted publication date: 20090708 Termination date: 20120710 |