CN102601917B - Rubber preforming machine - Google Patents
Rubber preforming machine Download PDFInfo
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- CN102601917B CN102601917B CN201210078516.9A CN201210078516A CN102601917B CN 102601917 B CN102601917 B CN 102601917B CN 201210078516 A CN201210078516 A CN 201210078516A CN 102601917 B CN102601917 B CN 102601917B
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Abstract
The invention relates to the field of rubber preforming equipment and aims at providing a rubber preforming machine, wherein the shape or the weight of a preformed rubber blank can be adjusted in any time, and the preformed rubber blank can be placed in a forming machine to be subjected to injection molding vulcanization forming without cutting or heating. The rubber preforming machine comprises a rack, a plasticizing device, a material storage barrel, an ejection device, a material receiving device and a heating device, wherein the plasticizing device is fixedly connected with the rack and the material storage barrel respectively; the ejection device is fixedly connected with the rack and the material storage barrel respectively; the material storage barrel is provided with a material storage hole and a material outlet which is communicated with the lower end of the material storage hole; and the material receiving device is positioned below the material outlet and fixedly connected with rack. According to the rubber preforming machine, the shape or the weight of the rubber blank preformed by the rubber preforming machine can be adjusted in any time, and the preformed rubber blank can be placed in the forming machine to be subjected to injection molding vulcanization forming without cutting or heating.
Description
Technical field
The present invention relates to rubber pre-forming device field, especially a kind of shape of preformed compound blank or weight can adjust at any time on request and preformed after compound blank do not need cutting and heating just can put into the rubber preforming machine that forming machine carries out injection sulfurization moulding.
Background technology
When rubber parts is made, glue stuff compounding need to first plastify preformed and make compound blank, then puts into shaping mould and makes rubber parts; The disclosure of the invention of Chinese patent notification number CN102320094A a kind of rubber bar pre-forming machine, by motor, by decelerator, driven the dandy roll group sheet rubber preforming machine of a pair of cooperation moulding, dandy roll is supported on support, below the dandy roll of a pair of dandy roll discharging one side, is provided with and can coordinates with this dandy roll the adhesive tape forming device that the sheet rubber molding is cut into rubber strip; The preformed compound blank obtaining after this rubber bar pre-forming machine is strip cold conditions compound blank, just can put into the deficiency that shaping mould carries out injection sulfurization moulding after existing compound blank after needing before injection sulfurization moulding by the weight of rubber parts requirement, strip compound blank to be cut and to be cut to heat in electric dry oven; Therefore, design a kind of shape of preformed compound blank or weight can be adjusted on request at any time and preformed after compound blank do not need cutting and heating just can put into the rubber preforming machine that forming machine carries out injection sulfurization moulding, become problem demanding prompt solution.
Summary of the invention
The object of the invention is just can put into the deficiency that forming machine carries out injection sulfurization moulding in order to overcome after current rubber preforming machine exists compound blank after needing before injection sulfurization moulding by the volume or weight of rubber parts requirement, strip compound blank to be cut and to be cut to heat in electric dry oven, a kind of shape of preformed compound blank is provided or weight can be adjusted on request at any time and preformed after compound blank do not need cutting and heating just can put into the rubber preforming machine that forming machine carries out injection sulfurization moulding.
Concrete technical scheme of the present invention is:
A preforming machine, described rubber preforming machine comprises frame, for plasticizing apparatus that glue stuff compounding is plastified, deposit the material storage tube of plasticizing sizing material, for an ejecting device for plasticizing sizing material squeezing out quantitative, material-receiving device with for the heater of heating plasticizing device and ejecting device; Described plasticizing apparatus is fixedly connected with material storage tube with frame respectively; Described ejecting device is fixedly connected with material storage tube with frame respectively; The discharge opening that described material storage tube is provided with material stock hole and is communicated with the lower end in material stock hole, material-receiving device is positioned at the below of discharge opening and is fixedly connected with frame.This rubber preforming machine is controlled by PLC controller, during use, the shape requiring according to preformed compound blank or weight set the each extrusion plasticizing sizing material of ejecting device quantitatively, material-receiving device is adjusted to and requires height, opens heater plasticizing apparatus and ejecting device are heated to and require temperature; Unlatching plasticizing apparatus is put into glue stuff compounding and is plastified, plasticizing material enters material storage tube storage, open ejecting device, material-receiving device press setup parameter and ejecting device links, and the preforming material that requires shape or weight drops to and in material-receiving device, forms column or bulk preformed compound blank through discharge opening; The shape of the preformed compound blank after this rubber preforming machine preformed or weight can adjust at any time on request and preformed after compound blank do not need cutting and heating just can put into forming machine and carry out injection sulfurization moulding.
As preferably, described plasticizing apparatus comprises machine barrel, screw rod, oil motor, thrust axis and check valve; Described oil motor is fixedly connected with frame respectively with one end of machine barrel, and the other end of machine barrel is fixedly connected with material storage tube; Described screw rod is positioned at machine barrel, between screw rod and machine barrel, forms spiraled cavity; The outside of described machine barrel is provided with the charging aperture being communicated with one end of spiraled cavity, and the other end of spiraled cavity is communicated with material stock hole by check valve; The output shaft of described oil motor is fixedly connected with one end of screw rod by thrust axis.Plasticizing apparatus is simple and practical, and when check valve can prevent from penetrating, plasticizing material flows backwards.
As preferably, described ejecting device comprises adapter sleeve, plunger, sleeve, oil cylinder, stop and limited block; Described sleeve is provided with the plunger hole identical with the diameter in material stock hole, and the diameter of plunger mates with the aperture of plunger hole; Described adapter sleeve is fixedly connected with frame, and the two ends of adapter sleeve are fixedly connected with oil cylinder with one end of sleeve respectively, and the other end of described sleeve is fixedly connected with material storage tube and plunger hole is aimed at material stock hole; One end of plunger is fixedly connected with the piston rod of oil cylinder, and the other end of plunger stretches in plunger hole through adapter sleeve; The sidewall of described adapter sleeve is provided with groove along its length, and one end of limited block is fixedly connected with plunger, and the other end of limited block stretches out outside adapter sleeve through groove; Described stop is fixedly connected with adapter sleeve, and the gage outfit of stop is fixedly connected with the other end of limited block.Ejecting device is simple and practical, and stop and limited block coordinate the stroke of setting cylinder piston rod, and making the amount of each plasticizing sizing material penetrating is shape or the weight that preformed compound blank requires.
As preferably, described stop is displacement transducer.Practical reliable.
As preferably, described heater comprises oil heater, is positioned at the spiral oil duct of sleeve gusset and machine barrel gusset; The two ends of described spiral oil duct are connected with going out to hold with the inlet side of oil heater respectively by pipeline.Oil heater is general part, and cost is low.
As preferably, described material-receiving device comprises the electric pushrod of receiver, dish seat, the first motor, fixed mount and the lifting of driving fixed mount; Described electric pushrod is with the second motor and contiguous block; The side of described fixed mount is fixedly connected with the contiguous block of electric pushrod, and electric pushrod is fixedly connected with frame; Described dish seat is positioned at the below of discharge opening, and the first motor is fixedly connected with fixed mount, and the flange of the first motor is fixedly connected with dish seat; Described dish seat is provided with alignment pin, and receiver is provided with the locating hole mating with alignment pin; It is upper that receiver is placed on dish seat, and locating hole is enclosed within outside alignment pin.Shape or weight that the height of receiver can require according to preformed compound blank regulate, and when receiver, fill need to change time, and electric pushrod can be changed easily after fixed mount drives receiver to decline.
As preferably, described material-receiving device is provided with temperature measurer and support; Described temperature measurer is positioned at the top in receiver outside; Described support is fixedly connected with fixed mount with temperature measurer respectively.Temperature measurer detects the temperature of preformed compound blank and by the design temperature of PLC controller control and regulation oil heater, the temperature of preformed compound blank is met the requirements.
As preferably, the first described motor is servomotor or stepper motor; The second motor is servomotor or stepper motor; Described temperature measurer is infrared radiation thermometer.Practical reliable.
As preferably, described rubber preforming machine is provided with for opening or block valve for sealing material and the cylinder of discharge opening; Described valve for sealing material comprises pull bar, valve body and spool; Described valve body is provided with the material path being communicated with discharge opening along the vertical direction, and described valve body is laterally provided with the transverse holes of mating with the external diameter of spool, and spool is positioned at transverse holes and valve body is rotationally connected; Spool is provided with for being communicated with or blocking the spool bore of material path, and one end of spool is stretched out outside valve body and is fixedly connected with pull bar; Described cylinder and frame are hinged, and the piston rod of cylinder and one end of pull bar are hinged.After bulk compound blank of every injection, closing valve for sealing material can prevent from plastifying sizing material curtain coating and affect quality.
Compared with prior art, the invention has the beneficial effects as follows: once. the weight of the preformed compound blank after this rubber preforming machine preformed can adjust at any time on request and preformed after compound blank do not need cutting and heating can put into forming machine to carry out injection sulfurization moulding.Two. plasticizing apparatus is simple and practical, and when check valve can prevent from penetrating, plasticizing material flows backwards.Three. ejecting device is simple and practical, stop and limited block coordinate the stroke of setting cylinder piston rod, during injection, electric pushrod drives receiver to press setting speed decline, make the amount of each plasticizing sizing material penetrating meet shape or the weight that preformed compound blank requires, stop is that displacement transducer is practical reliable.Four. shape or weight that the height of receiver can require according to preformed compound blank regulate, and when receiver, fill need to change time, and electric pushrod can be changed easily after fixed mount drives receiver to decline.Five. temperature measurer detects the temperature of preformed compound blank and by the design temperature of PLC controller control and regulation oil heater, the temperature of preformed compound blank is met the requirements; Temperature measurer is that infrared radiation thermometer is practical reliable.Six. after bulk compound blank of every injection, close valve for sealing material and can prevent from plastifying sizing material curtain coating and affect quality.Seven. oil heater is general part, and cost is low.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is the A place enlarged drawing of Fig. 1.
In figure: frame-1, spiral oil duct-2, material storage tube-3, material stock hole-31, discharge opening-32, valve for sealing material-4, pull bar-41, valve body-42, material path-43, transverse holes-44, spool-45, spool bore-46, cylinder-5, cylinder piston rod-51, machine barrel-6, spiraled cavity-61, charging aperture-62, oil motor-7, output shaft-71, adapter sleeve-8, groove-81, oil cylinder-9, cylinder piston rod-91, screw rod-10, thrust axis-11, check valve-12, plunger-13, sleeve-14, plunger hole-141, stop-15, gage outfit-151, limited block-16, oil heater-17, receiver-18, locating hole-181, dish seat-19, alignment pin-191, the first motor-20, flange-201, fixed mount-21, electric pushrod-22, the second motor-221, contiguous block-222, temperature measurer-23, support-24.
The specific embodiment
Below in conjunction with shown in accompanying drawing, the present invention is described further.
As shown in accompanying drawing 1, accompanying drawing 2: a kind of rubber preforming machine, described rubber preforming machine comprises frame 1, for plasticizing apparatus that glue stuff compounding is plastified, deposit the material storage tube 3 of plasticizing sizing material, for an ejecting device for plasticizing sizing material squeezing out quantitative, material-receiving device with for the heater of heating plasticizing device and ejecting device; The discharge opening 32 that described material storage tube 3 has material stock hole 31 and is communicated with the lower end in material stock hole 31, material-receiving device is positioned at the below of discharge opening 32 and is fixedly connected with frame 1.
Described rubber preforming machine has for opening or block valve for sealing material 4 and the cylinder 5 of discharge opening 32; Valve for sealing material 4 comprises pull bar 41, valve body 42 and spool 45; Described valve body 42 is provided with the material path 43 being communicated with discharge opening 32 along the vertical direction, valve body 42 laterally there is the transverse holes 44 coordinating with the crest clearance of spool 45, spool 45 is positioned at transverse holes 44 and is rotationally connected with valve body 42; Spool 45 has for opening or block the spool bore 46 of material path 43, and one end of spool 45 is stretched out outside valve body and is connected with pull bar 41 screws; Cylinder 5 is hinged by jointed shaft and frame 1, and the piston rod 51 of cylinder 5 is hinged by jointed shaft with one end of pull bar 41.
Described plasticizing apparatus is fixedly connected with material storage tube 3 with frame 1 respectively; In the present embodiment, described plasticizing apparatus comprises machine barrel 6, screw rod 10, oil motor 7, thrust axis 11 and check valve 12; One end of oil motor 7 and machine barrel 6 is connected with frame 1 screw respectively, and the other end of machine barrel 6 is connected with the side screw of material storage tube 3; Screw rod 10 is positioned at machine barrel 6, and screw rod 10 is rotationally connected by bearing and machine barrel 6, between screw rod 10 and machine barrel 6, forms spiraled cavity 61; The outside of machine barrel 6 has the charging aperture 62 being communicated with one end of spiraled cavity 61, and the other end of spiraled cavity 61 is communicated with material stock hole 31 by check valve 12; The output shaft thrust axis 11 of oil motor 7 is connected with one end key of screw rod 10.
Described ejecting device is fixedly connected with material storage tube 3 with frame 1 respectively; In the present embodiment, described ejecting device comprises adapter sleeve 8, plunger 13, sleeve 14, oil cylinder 9, stop 15 and limited block 16; Sleeve 14 has the plunger hole 141 identical with the diameter in material stock hole 31, and the diameter of plunger 13 coordinates with the bore clearance of plunger hole 141; The side of adapter sleeve 8 is connected with frame 1 screw, and the two ends of adapter sleeve 8 are connected with oil cylinder 9 screws with one end of sleeve 14 respectively, and the other end of sleeve 14 is connected with the upper end screw of material storage tube 3 and plunger 13 holes are aimed at material stock hole 31; One end of plunger 13 is threaded with the piston rod 91 of oil cylinder 9, and the other end of plunger 13 stretches in plunger hole 141 through adapter sleeve 8; The sidewall of adapter sleeve 8 has groove 81 along its length, and one end of limited block 16 is connected with plunger 13 screws, and the other end of limited block 16 stretches out outside adapter sleeve 8 through groove 81; Stop 15 is displacement transducer, and stop 15 is connected with adapter sleeve 8 screws, and the gage outfit 151 of stop 15 is threaded with the other end of limited block 16.
Described heater comprises oil heater 17, is positioned at the spiral oil duct 2 of sleeve 14 gussets and machine barrel 6 gussets; The two ends of spiral oil duct 2 are connected with going out to hold with the inlet side of oil heater 17 respectively by pipeline.
Described material-receiving device comprises receiver 18, dish seat the 19, first motor 20, fixed mount 21 and drives the electric pushrod 22 of fixed mount 21 liftings; Electric pushrod 22 is with the second motor 221 and contiguous block 222; The side of fixed mount 21 is connected with contiguous block 222 screws of electric pushrod 22, and electric pushrod 22 is connected with frame 1 screw; Dish seat 19 is positioned at the below of discharge opening 32, and dish seat 19 is connected with flange 201 screws of the first motor 20, and the first motor 20 is connected with the upper end screw of fixed mount 21; Receiver 18 has locating hole 181, and dish seat 19 has the alignment pin 191 with locating hole 181 matched in clearance, and receiver 18 is placed on dish seat 19, and locating hole 181 is enclosed within outside alignment pin 191; Described material-receiving device has temperature measurer 23 and support 24; Temperature measurer 23 is positioned at the top in receiver 18 outsides; Support 24 is connected with fixed mount 21 screws with temperature measurer 23 respectively; The first motor 20 is servomotor or stepper motor; The second motor 221 is servomotor or stepper motor; In the present embodiment, the first described motor 20 is servomotor, and the second motor 221 is servomotor, and temperature measurer 23 is infrared radiation thermometer.
This rubber preforming machine is controlled by PLC controller, during use, the shape requiring according to preformed compound blank or weight are set stop 15, electric pushrod 22 drives receivers 18 to be adjusted to through fixed mount 21 and requires height, opens oil heater 17, stream of hot oil through pipeline and is positioned at sleeve 14 gussets and the spiral oil duct 2 of machine barrel 6 gussets is heated to plasticizing apparatus and ejecting device to require temperature, opening oil motor 7 drives screw rod 10 to rotate, from the charging aperture 62 of machine barrel 6, putting into glue stuff compounding plastifies, under screw rod 10 effects, plasticizing material enters the material stock hole 31 of material storage tube 3 and the top of discharge opening 32 through check valve 12, open cylinder 5, cylinder piston rod 51 stretches out the spool 45 that rotates valve for sealing material 4 by pull bar 41, the spool bore 46 of spool 45 and the material path 43 of valve body 42 are communicated with, open oil cylinder 9, cylinder piston rod 91 stretches out and drives plunger 13 to move downward the stroke of setting, stop 15 makes by PLC controller that oil cylinder 9 is spacing to be stopped, require the preforming material of shape or weight to drop to through the bottom of discharge opening 32 and in receiver 18, form column or bulk preformed compound blank, cylinder piston rod 51 is retracted and is closed valve for sealing material 4, and cylinder piston rod 91 is retracted and driven plungers 13 resets that move upward, and the first motor 20 drives receivers 18 to rotate angles for settings by dish seat 19, carries out the making of next preforming material, temperature measurer 23 detects the temperature of preformed compound blank and by the design temperature of PLC controller control and regulation oil heater 17, the temperature of preformed compound blank is met the requirements.When receiver 18 is filled need to change time, electric pushrod 22 can be changed easily receiver 18 after fixed mount 21 drives receivers 18 to decline.
The invention has the beneficial effects as follows: the weight of the preformed compound blank after this rubber preforming machine preformed can adjust at any time on request and preformed after compound blank do not need cutting and heating just can put into forming machine and carry out injection sulfurization moulding.Plasticizing apparatus is simple and practical, and when check valve can prevent from penetrating, plasticizing material flows backwards.Ejecting device is simple and practical, stop and limited block coordinate the stroke of setting cylinder piston rod, and during injection, electric pushrod drives receiver to press setting speed decline, make the amount of each plasticizing sizing material penetrating meet shape or the weight that preformed compound blank requires, stop is that displacement transducer is practical reliable.Shape or weight that the height of receiver can require according to preformed compound blank regulate, and when receiver, fill need to change time, and electric pushrod can be changed easily after fixed mount drives receiver to decline.Temperature measurer detects the temperature of preformed compound blank and by the design temperature of PLC controller control and regulation oil heater, the temperature of preformed compound blank is met the requirements; Temperature measurer is that infrared radiation thermometer is practical reliable.After bulk compound blank of every injection, closing valve for sealing material can prevent from plastifying sizing material curtain coating and affect quality.Oil heater is general part, and cost is low.
It is apparent to one skilled in the art that the present invention can change into various ways, and such change is not thought and departed from the scope of the present invention.All so apparent modifications of the technical staff to described field, within being included in the scope of this claim.
Claims (7)
1. a rubber preforming machine, is characterized in that: described rubber preforming machine comprises frame, the plasticizing apparatus for glue stuff compounding is plastified, the material storage tube of depositing plasticizing sizing material, for an ejecting device for plasticizing sizing material squeezing out quantitative, material-receiving device with for the heater of heating plasticizing device and ejecting device; Described plasticizing apparatus is fixedly connected with material storage tube with frame respectively; Described ejecting device is fixedly connected with material storage tube with frame respectively; The discharge opening that described material storage tube is provided with material stock hole and is communicated with the lower end in material stock hole, material-receiving device is positioned at the below of discharge opening and is fixedly connected with frame; Described plasticizing apparatus comprises machine barrel, screw rod, oil motor, thrust axis and check valve; Described oil motor is fixedly connected with frame respectively with one end of machine barrel, and the other end of machine barrel is fixedly connected with material storage tube; Described screw rod is positioned at machine barrel, between screw rod and machine barrel, forms spiraled cavity; The outside of described machine barrel is provided with the charging aperture being communicated with one end of spiraled cavity, and the other end of spiraled cavity is communicated with material stock hole by check valve; The output shaft of described oil motor is fixedly connected with one end of screw rod by thrust axis; Described rubber preforming machine is provided with for opening or block valve for sealing material and the cylinder of discharge opening; Described valve for sealing material comprises pull bar, valve body and spool; Described valve body is provided with the material path being communicated with discharge opening along the vertical direction, and described valve body is laterally provided with the transverse holes of mating with the external diameter of spool, and spool is positioned at transverse holes and valve body is rotationally connected; Spool is provided with for being communicated with or blocking the spool bore of material path, and one end of spool is stretched out outside valve body and is fixedly connected with pull bar; Described cylinder and frame are hinged, and the piston rod of cylinder and one end of pull bar are hinged.
2. rubber preforming machine according to claim 1, is characterized in that: described ejecting device comprises adapter sleeve, plunger, sleeve, oil cylinder, stop and limited block; Described sleeve is provided with the plunger hole identical with the diameter in material stock hole, and the diameter of plunger mates with the aperture of plunger hole; Described adapter sleeve is fixedly connected with frame, and the two ends of adapter sleeve are fixedly connected with oil cylinder with one end of sleeve respectively, and the other end of described sleeve is fixedly connected with material storage tube and plunger hole is aimed at material stock hole; One end of plunger is fixedly connected with the piston rod of oil cylinder, and the other end of plunger stretches in plunger hole through adapter sleeve; The sidewall of described adapter sleeve is provided with groove along its length, and one end of limited block is fixedly connected with plunger, and the other end of limited block stretches out outside adapter sleeve through groove; Described stop is fixedly connected with adapter sleeve, and the gage outfit of stop is fixedly connected with the other end of limited block.
3. rubber preforming machine according to claim 2, is characterized in that: described stop is displacement transducer.
4. according to the rubber preforming machine described in claim 2 or 3, it is characterized in that: heater comprises oil heater, is positioned at the spiral oil duct of sleeve gusset and machine barrel gusset; The two ends of described spiral oil duct are connected with going out to hold with the inlet side of oil heater respectively by pipeline.
5. according to the rubber preforming machine described in claim 1 or 2 or 3, it is characterized in that: described material-receiving device comprises the electric pushrod of receiver, dish seat, the first motor, fixed mount and the lifting of driving fixed mount; Described electric pushrod is with the second motor and contiguous block; The side of described fixed mount is fixedly connected with the contiguous block of electric pushrod, and electric pushrod is fixedly connected with frame; Described dish seat is positioned at the below of discharge opening, and the first motor is fixedly connected with fixed mount, and the flange of the first motor is fixedly connected with dish seat; Described dish seat is provided with alignment pin, and receiver is provided with the locating hole mating with alignment pin; It is upper that receiver is placed on dish seat, and locating hole is enclosed within outside alignment pin.
6. rubber preforming machine according to claim 5, is characterized in that: described material-receiving device is provided with temperature measurer and support; Described temperature measurer is positioned at the top in receiver outside; Described support is fixedly connected with fixed mount with temperature measurer respectively.
7. rubber preforming machine according to claim 6, is characterized in that: the first described motor is servomotor or stepper motor; The second motor is servomotor or stepper motor; Described temperature measurer is infrared radiation thermometer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210078516.9A CN102601917B (en) | 2012-03-22 | 2012-03-22 | Rubber preforming machine |
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| CN201210078516.9A CN102601917B (en) | 2012-03-22 | 2012-03-22 | Rubber preforming machine |
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| CN102601917A CN102601917A (en) | 2012-07-25 |
| CN102601917B true CN102601917B (en) | 2014-01-22 |
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| CN103913213A (en) * | 2014-04-10 | 2014-07-09 | 龙泉市金鸿汽车空调有限公司 | Automatic DMC material metering machine |
| CN104526951B (en) * | 2014-12-31 | 2016-08-17 | 成都盛帮双核科技有限公司 | One accurately feeds intake formula rubber mold and curing operation method |
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| JPS63109025A (en) * | 1986-10-27 | 1988-05-13 | Toyoda Gosei Co Ltd | Material pouring device for forming joint |
| CN2649314Y (en) * | 2003-04-24 | 2004-10-20 | 香港生产力促进局 | Injection device of miniature plastic part with superhigh speed precision pressure control |
| US7291297B2 (en) * | 2004-01-23 | 2007-11-06 | Husky Injection Molding Systems Ltd. | Injection molding method and apparatus for continuous plastication |
| CN101823037B (en) * | 2010-03-30 | 2011-10-26 | 日泰（上海）汽车标准件有限公司 | Novel coating system |
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| CN2495447Y (en) * | 2001-08-22 | 2002-06-19 | 南彰实业股份有限公司 | Rubber injection moulding machine having a special flow channel |
| CN2640726Y (en) * | 2003-07-14 | 2004-09-15 | 桂明工业有限公司 | Vacuum jetting make-up machine for plastic |
| US20080067704A1 (en) * | 2004-10-18 | 2008-03-20 | Riken | Micro-Molding Equipment and Micro-Molding Method |
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