CN2855704Y - Injection moulding machine - Google Patents
Injection moulding machine Download PDFInfo
- Publication number
- CN2855704Y CN2855704Y CNU2005201072380U CN200520107238U CN2855704Y CN 2855704 Y CN2855704 Y CN 2855704Y CN U2005201072380 U CNU2005201072380 U CN U2005201072380U CN 200520107238 U CN200520107238 U CN 200520107238U CN 2855704 Y CN2855704 Y CN 2855704Y
- Authority
- CN
- China
- Prior art keywords
- injection
- post
- metering
- plastic melt
- measuring
- 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.)
- Expired - Fee Related
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Classifications
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- 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
- B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw
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- 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
- B29C2045/0094—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor injection moulding of small-sized articles, e.g. microarticles, ultra thin articles
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- 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
- B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
- B29C2045/1792—Machine parts driven by an electric motor, e.g. electric servomotor
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses an injection molding machine used on injection molding mini-type parts, comprising a sol part, which is provided with a cylinder barrel and an extrusion screw rod; a measuring part, which is provided with a river closure nozzle that is arranged on the other end of the cylinder barrel; a measuring post , which moves inside a measuring channel so as to push plastic melt and the measuring channel is communicated with the river closure nozzle ; a servo motor , which is used to drive the measuring post; a pressure sensor arranged on the measuring post, which is used to detect the pressure acted on the measuring post by the plastic melt; an injection part, which includes an injection channel that is communicated with the cavity of the injection mould and is vertically communicated with the measuring channel, an injection post that moves inside the injection channel so as to push the plastic melt, and an injection servo motor that is used to drive the injection post; a pressure sensor of a mould cavity that is arranged inside the mould cavity; and a controller, which is provided with a controlling program, and sequentially sends out the controlling signals to the sol part, the measuring part and the injection part to finish the injection molding process. The injection molding machine can manufacture mini-type injection molding parts with a high precision.
Description
Technical field
The utility model relates to a kind of injection machine, particularly relates to a kind of injection machine that is used for the injection moulding miniature parts.
Background technology
Traditional injection machine comprises injection device and injection mold.Injection device comprises cylinder barrel and is arranged in the cylinder barrel by motor-driven injection screw.Plastic grain is sent into by hopper from cylinder barrel one end, and the rotation by injection screw advances, and the injection nozzle through being positioned at the cylinder barrel other end injects the injection mold chamber, forms required injection-moulded plastic part.The yi word pattern injection screw is used for plastifying, inject and the plastic melt of mold cavity is remained on molten condition.The size of required screw rod will be proportional to the size of injection-moulded plastic part.When injection-moulded plastic part more and more hour, can't on the pressure of injection-moulded plastic part and Weight control, obtain enough precision only according to the size that reduces screw rod.
At the plastic phase of micro-injection moulding, if the yi word pattern screw rod is too little, promptly less than 14 millimeters, then the mechanical strength of screw rod just is not enough to the moment that provides required in the process that plastic grain is trimmed to molten condition.
At the injection stage of micro-injection moulding, the thermal capacitance of a small amount of plastic melt (as less than 0.1 gram) is too little, to such an extent as under normal injection speed, plastic melt was just solidified in the runner of mould before being filled into mold cavity.Therefore need provide a kind of driving mechanism, so that higher injection speed to be provided, stable deceleration and stall position accurately during switching, and accurate pressure is controlled and the injection-moulded plastic part ejection.
The utility model content
For solving problems of the prior art, the purpose of this utility model is to provide a kind of injection machine that can make the micro-injection moulding part accurately.
The purpose of this utility model is to realize like this, a kind of injection machine that is used for the injection moulding miniature parts promptly is provided, it is characterized in that, comprise sol-fraction, metering section, injection portion, controller and injection mold, described sol-fraction comprises cylinder barrel and extruding screw, an end of described cylinder barrel is provided with opening, be used to receive the plastic grain as injection raw material, described extruding screw is positioned at cylinder barrel and is rotated by the extruding screw motor-driven;
Metering section, comprise and be installed in the cylinder barrel other end, be used to discharge the nozzle that dams of the plastic melt that plastic grain forms, the measurement channel that communicates with the nozzle that dams, motion is to promote the metering post of plastic melt in measurement channel, be used to drive the metering servomotor of metering post, be installed in and be used to detect the pressure sensor that plastic melt acts on the pressure on the metering post on the metering post;
Injection portion, comprise communicate with the injection mold chamber and with the vertical injection canal that communicates of measurement channel, motion is used to drive the injection servomotor of injection post to promote the injection post of plastic melt in injection canal, is installed in the mold cavity pressure sensor in the mold cavity;
Controller is equipped with control program, sends control signal to sol-fraction, metering section, injection portion successively and finishes injection moulding process.
The utility model provides a kind of unique design, and the function of yi word pattern injection screw is divided into three independently modules, and promptly one is used for metering, and one is used for injection control, and one is used for pressure control.Specially designed metering post can guarantee to be sent to the order that the injecting unit plastic melt is followed first in first out.Can avoid plastic melt to accumulate in the metering units and like this and heat deterioration because of prolonging.In addition, this design be also advantageous in that the machined difficulty that can eliminate the minor diameter injection screw, solve in the high-speed motion the inaccurate problem in location and mold cavity is filled and the pressure control problem of pressure maintenance phase.
Description of drawings
Describe the utility model in detail with reference to the following drawings, wherein:
Fig. 1 is the schematic diagram of the utility model injection machine;
Fig. 2 is the enlarged diagram of A part among Fig. 1.
The specific embodiment
As shown in Figure 1, the injection machine that is used for the injection moulding miniature parts comprises sol-fraction, metering section, injection portion, controller 21 and injection mold 30.Sol-fraction comprises cylinder barrel 20, and the one end is provided with opening, is used to receive the plastic grain as injection raw material; Extruding screw 1 is positioned at cylinder barrel 20 and drives rotation by extruding screw motor 11.Metering section, comprise and be installed in cylinder barrel 20 other ends, be used to discharge the nozzle 4 that dams of the plastic melt that plastic grain forms, the measurement channel 2 that communicates with the nozzle 4 that dams, motion is to promote the metering post 3 of plastic melt in measurement channel 2, be used to drive the metering servomotor 12 of metering post, be installed in and be used to detect the pressure sensor 5 that plastic melt acts on the pressure on the metering post on the metering post.Injection portion comprise communicate with mold cavity and with the measurement channel 2 vertical injection canals that communicate 18, motion is used to drive the injection servomotor 10 of injection post 13 to promote the injection post 13 of plastic melt in injection canal 15; Be installed in the mold cavity pressure sensor 9 in the mold cavity.Controller 21 sends various control signals according to default program.
Transmission mechanism between injection servomotor 10 and injection post 13 can also comprise the ball-screw 15 that links to each other with the output shaft of injection servomotor 10, on leading screw, carry out straight-line ball nut 16 along with the ball-screw rotation, the toggle 6 that the hinged and other end of follower rollers 7, one ends that are connected with ball nut 15 and above-mentioned ball nut 15 and injection post 13 are hinged.Injecting unit bolster 14 comprises the inclination cam surface 8 of two right-angle sides and transition between right-angle side for roughly L shaped.Injection post 13 and injection canal 15 are installed on the right-angle side of injecting unit bolster 14.The output shaft of injection servomotor 10 is parallel with another right-angle side of injecting unit bolster 14.Roller 7 moves along inclination cam surface 8 all the time, drives injection post 13 through toggle 6 and finishes linear reciprocating motion.
The course of work of the application's injection machine will be described in detail belows.When injection cycle began, plastic grain was fed into the extruding screw 1 that is positioned at whole injecting assembly middle part.Motor 11 drives extruding screw 1 and rotates, and rotating speed is adjustable.Plastic grain is by the shearing force of extruding screw 1 and resistance heater and the heat energy that produces and plastifying.Servomotor 12 drives the transmission mechanism that comprises ball-screw 17 makes the metering post back move to the precalculated position, injects post 13 simultaneously and moves to progressive position, blocks the opening of measurement channel 2.Subsequently, plastic melt is fed into measurement channel 2 through damming nozzle 4.Metering post 3 is by servomotor 12 and pressure sensor 5 closed-loop controls, and sensor 5 is used to detect plastic melt and acts on the pressure that measures on the post.Therefore, can control the pressure of plastic melt.After almost reaching default melt pressure, the nozzle 4 that dams is closed and is prevented that excessive plastic melt from flowing into measurement channel 2.Subsequently, metering post 3 moves slightly so that accurately regulate the pressure of melt.As shown in Figure 2, the head of metering post 3 has the end face to the direction inclination of the nozzle 4 that dams, to guarantee the order feeding of plastic melt with FIFO.
In case metering phase is finished, injection post 13 moves backward and the metering post moves upward and before the plastic melt that will correctly measure is sent to injection post 13.The end of injection post 13 connects toggle 6, and toggle 6 provides driving force and starts the motion of injection post 13 high-speed linears, and slows down gradually at injection post 13 accurate end positions when toggle 6 extends into straight line fully.At first injection stage, injection post 13 pushed mold cavity with plastic melt before solidifying, realize quick filling.
First injection stage is based on the mechanism of Position Control.Reach end position when injecting post 13, when promptly toggle 6 full extension were opened, this high speed injection phase transition was the pressure control stage.In the end of toggle 6 follower rollers 7 is installed, it slides and whole injecting unit slightly moved forward and provides pressurize (packing pressure) for injection-moulded plastic part along inclination cam surface 8.The position of injection post 13 rear sides is by servomotor 10 controls.When mold cavity when filling up, the increased pressure that mold cavity pressure sensor 9 monitors passes to controller 21.Then, servomotor 10 is adjusted the output of motor according to the feedback signal of controller 21, so that set coupling with the input pressure in the injection machine parameter.Subsequently, inject extra plastic melt to fill up and to compensate thermal contraction fully to mold cavity.After mould was opened, servomotor 10 drove ball-screws 15, makes ball nut 16 a little forward, thereby made follower rollers slide and further move forward along inclination cam surface 8, so that disengage cast gate or injection-moulded plastic part.
Last at injection cycle, metering post 3 and injection post 13 are retracted into the home position, prepare to move next time.
Design of the present invention has solved all difficulties that run into when using minor diameter yi word pattern injection screw to come the small plastic part of injection moulding.
In order to control the metered volume of plastic melt, adopt the very little post (sectional area is little) of diameter to realize accurate volume control for given linear precision.
This design provides a kind of low cost solution, realizes high injection speed by toggle 6 designs, and progressively slowing down reaches end position accurately.
Because toggle 6 provides needed mechanical advantage, do not need high-power servomotor to control injection post 13.
The metering post head end face that tilts makes the fresh melt at the plastic melt origin self compaction screw rod of measurement channel 2 inner accumulated upwards push away, thereby can avoid plastic melt overheated.Reach the order of plastic melt FIFO.
The inclination cam surface of machinery makes this injection device bolster can be forward move a little and the function that pressurize is provided and ejects.
The design of metering section can accumulate in the measurement channel 2 for the melt of many injections, and needn't all inject melt in each circulation, thereby has improved productivity ratio.
Although describe the specific embodiment of the present utility model in detail with reference to accompanying drawing, under the prerequisite that does not break away from spirit and scope of the present utility model, can carry out various improvement and distortion to the utility model.
Claims (3)
1. injection machine, be used for the injection moulding miniature parts, it is characterized in that, comprise sol-fraction, metering section, injection portion, controller and injection mold, described sol-fraction comprises cylinder barrel and extruding screw, an end of described cylinder barrel is provided with opening, be used to receive the plastic grain as injection raw material, described extruding screw is positioned at cylinder barrel and is rotated by the extruding screw motor-driven; Described metering section, comprise and be installed in the cylinder barrel other end, be used to discharge the nozzle that dams of the plastic melt that plastic grain forms, the measurement channel that communicates with the nozzle that dams, motion is to promote the metering post of plastic melt in measurement channel, be used to drive the metering servomotor of metering post, be installed in and be used to detect the pressure sensor that plastic melt acts on the pressure on the metering post on the metering post; Described injection portion, comprise communicate with described injection mold chamber and with the vertical injection canal that communicates of measurement channel, motion is used to drive the injection servomotor of injection post to promote the injection post of plastic melt in described injection canal, is installed in the mold cavity pressure sensor in the mold cavity; Described controller is equipped with control program, sends control signal to described sol-fraction, described metering section, described injection portion successively and finishes injection moulding process.
2. injection machine as claimed in claim 1, it is characterized in that, described injection portion also comprises ball-screw and the ball nut that is connected with injection servomotor output shaft, the follower rollers that is connected with described ball nut, one end and described ball nut hinged and toggle and roughly L shaped injecting unit bolster that the other end and described injection are column articulated, described injecting unit bolster comprises the inclination cam surface of two right-angle sides and transition between described right-angle side, wherein, described injection post and described injection canal are installed on the right-angle side of described injecting unit bolster, the output shaft of described injection servomotor is parallel with another right-angle side of described injecting unit bolster, follower rollers is moved along the inclination cam surface all the time, drives the injection post through toggle and finishes linear reciprocating motion.
3. injection machine as claimed in claim 1 is characterized in that, the head end of described metering post tilts towards the nozzle that dams.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201072380U CN2855704Y (en) | 2005-09-13 | 2005-09-13 | Injection moulding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201072380U CN2855704Y (en) | 2005-09-13 | 2005-09-13 | Injection moulding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2855704Y true CN2855704Y (en) | 2007-01-10 |
Family
ID=37599010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005201072380U Expired - Fee Related CN2855704Y (en) | 2005-09-13 | 2005-09-13 | Injection moulding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2855704Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101980849A (en) * | 2008-03-31 | 2011-02-23 | 东洋机械金属株式会社 | Inline screw type injection molding machine and method of controlling the same |
| CN101733916B (en) * | 2008-11-26 | 2012-07-25 | 北京化工大学 | Fusant differential precise injection molding machine |
| CN103660216A (en) * | 2012-09-20 | 2014-03-26 | 东莞市科盛实业有限公司 | Liquid silica gel injection machine |
| CN105563770A (en) * | 2016-03-09 | 2016-05-11 | 梁煜 | Glue melting mechanism of shoe making machine |
| CN105729730A (en) * | 2016-03-07 | 2016-07-06 | 宁波伯乐智能装备有限公司 | Spray conversion device of two-stage type injection molding machine |
-
2005
- 2005-09-13 CN CNU2005201072380U patent/CN2855704Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101980849A (en) * | 2008-03-31 | 2011-02-23 | 东洋机械金属株式会社 | Inline screw type injection molding machine and method of controlling the same |
| CN101980849B (en) * | 2008-03-31 | 2013-07-17 | 东洋机械金属株式会社 | Inline screw type injection molding machine and method of controlling the same |
| CN101733916B (en) * | 2008-11-26 | 2012-07-25 | 北京化工大学 | Fusant differential precise injection molding machine |
| CN103660216A (en) * | 2012-09-20 | 2014-03-26 | 东莞市科盛实业有限公司 | Liquid silica gel injection machine |
| CN105729730A (en) * | 2016-03-07 | 2016-07-06 | 宁波伯乐智能装备有限公司 | Spray conversion device of two-stage type injection molding machine |
| CN105729730B (en) * | 2016-03-07 | 2018-05-18 | 宁波双马机械工业有限公司 | A kind of meltallizing conversion equipment of two steps type injection molding machine |
| CN105563770A (en) * | 2016-03-09 | 2016-05-11 | 梁煜 | Glue melting mechanism of shoe making machine |
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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: 20070110 Termination date: 20100913 |