CN201848982U - Injection device of screw injection molding machine - Google Patents
Injection device of screw injection molding machine Download PDFInfo
- Publication number
- CN201848982U CN201848982U CN2010205631233U CN201020563123U CN201848982U CN 201848982 U CN201848982 U CN 201848982U CN 2010205631233 U CN2010205631233 U CN 2010205631233U CN 201020563123 U CN201020563123 U CN 201020563123U CN 201848982 U CN201848982 U CN 201848982U
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- injection
- nozzle
- plunger
- hydraulic
- connecting rod
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses an injection device of a screw injection molding machine, which comprises a nozzle head (1), a nozzle (2), a cylinder (3), a screw (4), a feeding hopper (5), a hydraulic motor (6), an injection cylinder (7) and a nozzle opening and closing mechanism. The nozzle opening and closing mechanism includes a plunger (9), an end cap (10), a connecting rod (11) and a support (12), wherein the plunger (9) is radially inserted into the nozzle (2), a seal ring (13) is arranged between the plunger and the nozzle, the plunger (9) and the connecting rod (1) are hinged at one end, the middle of the connecting rod is hinged with the support (12), the other end of the connecting rod (11) is connected with a connecting rod driving mechanism. The injection device adopts radial opening and closing, opening and closing of a fluid passage are automatically controlled according to injection process requirements, fluid flowing can be prevented effectively, a seat advance and retract process is omitted from a forming cycle, time is saved, and the injection device is convenient in use, low in pressure loss and fine in feeding effect.
Description
Technical field:
The utility model relates to the injection machine field, specifically is a kind of injection device that is used for screw injection molding machine.
Background technology:
Injection machine is the equipment that is used for mould of plastics is carried out injection mo(u)lding, and screw injection molding machine is use always a kind of.The nozzle of injection machine is the union piece between machine barrel and the mould, and during injection moulding, under the effect of screw rod thrust, the plastics of fusion inject the die cavity of mould by nozzle with very high flow velocity.The nozzle of injection machine mainly contains the nozzle of open-type nozzle, locking formula nozzle and special construction.Open type (through type) nozzle is meant that the passage of nozzle always is and is opening, valve body to close or to open of no use, when machine barrel front end and nozzle temperature too high, or machine barrel front end storing is too much under high pressure conditions, just be easy to generate " hydrostomia " phenomenon, make plastics under the present situation that mould opens wide, unexpectedly rob and be introduced into sprue inlet and hardening under the cooling effect of template, and hinder melt to enter die cavity swimmingly at start injection not.And, material warm deviation little material high for the injection requirement, adopt the open-type nozzle structure often to need to adopt an advance and retreat technology, and need the screw head of configuration non-return to guarantee the injection technique requirement.Locking formula nozzle is not when carrying out the injection moulding mold filling, and the passage in its nozzle is closed, and only when injection moulding, just the thimble in the nozzle removed, and carries out injection moulding again.Locking formula nozzle is divided into material and presses locking type, springlock closed form and controlled locking type.The pressure of melt self promotes nozzle head and blocks the interior duct of nozzle when expecting to press locking type nozzle to utilize preformed, to prevent " hydrostomia ", makes things convenient for the scope of application little (plastics of poor heat stability should not use) but use inadequately; Springlock closed form nozzle relies on spring force to realize locking, but the pressure loss is very big, the feeding effect is little; Controlled locking type mainly is to adopt the switching of the moving control needle-valve of liquid (or gas), but since needle-valve with axially sealing of thimble, the runner in the nozzle just need get around thimble, such runner is relatively bending and complicated just, and resistance is big.
The utility model content:
The technical problems to be solved in the utility model, provide a kind of employing radially to open and close the injection device that also can control the screw injection molding machine of fluid passage switching according to the injection technique requirement automatically, can effectively prevent " hydrostomia " phenomenon, in molding cycle, do not need to adopt seat advance and retreat technology, save time, and easy to use, the pressure loss is little, feeding is effective.
Technical solution of the present utility model is, the injection device of the screw injection molding machine of following structure is provided, comprise nozzle head, nozzle body, machine barrel, screw rod, feed hopper, hydraulic motor, injection cylinder and nozzle switching mechanism, described nozzle body is connected on the machine barrel, described screw rod is arranged in the machine barrel, described hydraulic motor is connected with screw rod by reduction box, and the output shaft of described injection cylinder is connected with screw rod.
Described nozzle switching mechanism comprises plunger, end cap, connecting rod, bearing, described plunger radial inserts in the nozzle body, be provided with sealing ring between described plunger and the nozzle body, described end cap is enclosed within on the plunger and screws on nozzle body, described plunger and connecting rod one end are hinged, hinged with bearing in the middle of the described connecting rod, described bearing is fixed on the nozzle body, and the other end of described connecting rod is connected with bar-link drive in order to drivening rod.
Adopt after the above structure compared with prior art, the utlity model has following advantage: adopt plunger radial that the runner in the nozzle is carried out locking and unlatching, nozzle flow channel is closed and blocked to plunger before the injection moulding, prevented " hydrostomia " phenomenon effectively, during injection moulding, plunger is opened, the fluid of fusion can enter nozzle mould of plastics is carried out injection moulding, owing to adopt radial manner control nozzle to open and close, when plunger is opened, in the plunger withdrawal nozzle wall, nozzle flow channel is opened fully, can not produce resistance to the fluid of fusion, the pressure loss is little, and feeding is effective; The switching of plunger makes bar operation down beyond the Great Wall by the bar-link drive drivening rod; And adopt the utility model structure, and require height for injection, expect the material that warm deviation is little, in molding cycle, do not need injection seat advance and retreat technology, save inject time, do not need to be equipped with the non-return screw head yet.
As improvement, described bar-link drive is a hydraulic jack, the piston of described hydraulic jack and rod hinge connection, and the operation that comes drivening rod like this by control, thereby the switching of control plunger to hydraulic jack, the reliability height, good stability, easy to operate.
As improvement, described injection device also comprises hydraulic pump, hydraulic control device, oil pipe I and oil pipe II, described hydraulic pump is communicated with hydraulic control device, described hydraulic control device is communicated with the bottom and the injection cylinder of hydraulic jack respectively by oil pipe I, and hydraulic control device also is communicated with the top and the hydraulic motor of hydraulic jack respectively through oil pipe II.Like this, control hydraulic jack, injection cylinder and hydraulic motor, can guarantee plunger automatically, accurately open and close according to the injection technique requirement by hydraulic pump, hydraulic control device, oil pipe I and oil pipe II, easy to use, locking is reliable.
As improvement, respectively be provided with a pressure-reducing valve on oil pipe I between described hydraulic control device and the hydraulic jack and the oil pipe II, like this, press by pressure-reducing valve alkali, make the oil pressure that enters hydraulic jack can be too not high, both can be smoothly plunger be opened and closed, also can not cause the displacement of machine barrel and influence plastic injection quality because of oil pressure is too high.
Description of drawings:
Accompanying drawing is the structural representation of the injection device of screw injection molding machine of the present utility model.
Shown in the figure: 1, nozzle head, 2, nozzle body, 3, machine barrel, 4, screw rod, 5, feed hopper, 6, hydraulic motor, 7, injection cylinder, 8, reduction box, 9, plunger, 10, end cap, 11, connecting rod, 12, bearing, 13, sealing ring, 14, hydraulic jack, 15, piston, 16, hydraulic pump, 17, hydraulic control device, 18, oil pipe I, 19, oil pipe II, 20, pressure-reducing valve, 21, lining.
The specific embodiment:
The utility model is described in further detail below in conjunction with the drawings and specific embodiments:
As shown in the figure, the injection device of screw injection molding machine of the present utility model, comprise nozzle, machine barrel 3, screw rod 4, feed hopper 5, hydraulic motor 6, injection cylinder 7 and nozzle switching mechanism, described nozzle cage is connected on the machine barrel 3, described screw rod 4 is arranged in the machine barrel 3, described hydraulic motor 6 is connected with screw rod 4 by reduction box 8, and the output shaft of described injection cylinder 7 is connected with screw rod 4; Described nozzle comprises nozzle head 1 and nozzle body 2, and described nozzle body 2 is connected with machine barrel 3.Being intended to provide specific embodiment herein, more than is prior art.
Described nozzle switching mechanism comprises plunger 9, end cap 10, connecting rod 11, bearing 12, described plunger 9 radially inserts in the nozzle body 2, be provided with sealing ring 13 between described plunger 9 and the nozzle body 2, described end cap 10 is enclosed within on the plunger 9 and screws on nozzle body 2, described plunger 9 is hinged with connecting rod 11 1 ends, hinged with bearing 12 in the middle of the described connecting rod 11, described bearing 12 is fixed on the body 2, and the other end of described connecting rod 11 is connected with bar-link drive in order to drivening rod 11; Described sealing ring 13 is an exotic material, also is with lining 21 between described plunger 9 and the nozzle body 2, and described lining 21 is positioned at the top of sealing ring 13.
Described bar-link drive is a hydraulic jack 14, and the piston 15 of described hydraulic jack 14 is hinged with connecting rod 11.
Described injection device also comprises hydraulic pump 16, hydraulic control device 17, oil pipe I 18 and oil pipe II19, described hydraulic pump 16 is communicated with hydraulic control device 17, described hydraulic control device 17 is communicated with the bottom and the injection cylinder 7 of hydraulic jack 14 respectively by oil pipe I 18, and hydraulic control device 17 also is communicated with the top and the hydraulic motor 6 of hydraulic jack 14 respectively by oil pipe II 19; Described " top ", " bottom ", needs in order to describe just, according to the difference of the placement location of injection device, its upper and lower meeting changes to some extent.
Respectively be provided with a pressure-reducing valve 20 on oil pipe I 18 between described hydraulic control device 17 and the hydraulic jack 14 and the oil pipe II 19; Described hydraulic control device 17 is flow, direction, the speed that enters the liquid of injection cylinder 7, hydraulic motor 6, oil pipe I 18 and oil pipe II 19 in order to adjusting, be control device commonly used in the hydraulic system, described hydraulic control device 17 also is connected with fuel tank, gives the device fuel feeding by fuel tank.
Operation principle of the present utility model: preformed begins, hydraulic oil is by hydraulic pump 16, hydraulic control device 17 and pressure-reducing valve 20 effects, enter the top of hydraulic jack 14 by oil pipe II 19, give 15 1 downward pressure of piston, driven plunger 15 moves downward, drivening rod 11 clockwise rotates, and connecting rod 11 drives plunger 9 and up moves, and closes fluid course.The hydraulic oil of hydraulic jack 14 lower ends is got back to fuel tank by oil pipe I 18 and hydraulic control device 17.Hydraulic pump 16 rotates by hydraulic control device 17 control hydraulic motors 6 simultaneously, driving screw rod 4 by reduction box 8 rotates, the solid material of dropping into from feed hopper 5 in the machine barrel 3 is fed forward, solid material the shear heat of screw rod 4 in conjunction with the effect of machine barrel 3 external heaters under fusion gradually, plastified when reaching machine barrel 4 front ends and be the viscous state fused materials; Along with material constantly enters into machine barrel 3 front end material stock districts, the melt in material stock district is on the increase; Bring up to when overcoming screw rod 4 and retreating mobile resistance when the melting material pressure in machine barrel 3 front end material stock districts, promptly material backs away to the pressure lead-screw of screw rod 4, and screw rod 4 is rotated further simultaneously, preformed metering beginning this moment; After screw rod 4 retreated into certain distance, when promptly the melt amount of preformed had reached requiring of injection volume, preformed stopped, start injection.During injection, hydraulic oil is by hydraulic pump 16, hydraulic control device 17 and pressure-reducing valve 20 effects, enter into the bottom of hydraulic jack 14 by oil pipe I 18, the piston 15 that drives on the hydraulic jack 14 moves upward, piston 15 drivening rods 11 rotate counterclockwise, connecting rod 11 drives plunger 9 and moves downward, and opens the fluid passage; At this moment, hydraulic pump 16 drives injection cylinder 7 by hydraulic control device 17, make the sprue of nozzle compaction mold, injection cylinder 7 moves screw rod 4 forward and the melt of machine barrel 3 front ends is applied certain pressure, this moment, fluid course was opened fully, melt is annotated the die cavity of progressive die tool with certain injection pressure and injection speed, and the melt of 4 pairs of machine barrel 3 front ends of screw rod keeps certain pressure to preset time (dwell time) subsequently.Simultaneously, the hydraulic oil of hydraulic jack 14 upper ends and get back to fuel tank by oil pipe II 19 and hydraulic control device 17.Injection device has just been finished a molding cycle like this, begins next molding cycle.
Because the decompression of pressure-reducing valve 20, by oil pipe I 18 and oil pipe II 19, the oil pressure that enters into hydraulic jack 14 can be too not high, both can smoothly plunger 9 be opened and closed, also can not cause the displacement of machine barrel 3 because oil pressure is too high, can make the good cooperation of machine barrel 3 and screw rod 4, ensure plastic injection quality.
Below only be described, but can not be interpreted as it is restriction claim with regard to the utility model preferred embodiment.The present invention not only is confined to above embodiment, and its concrete structure allows variation.In a word, all various variations of being done in the protection domain of the utility model independent claims are all in protection domain of the present utility model.
Claims (4)
1. the injection device of a screw injection molding machine, comprise nozzle head (1), nozzle body (2), machine barrel (3), screw rod (4), feed hopper (5), hydraulic motor (6), injection cylinder (7) and nozzle switching mechanism, described nozzle body (2) is socketed on the machine barrel (3), described screw rod (4) is arranged in the machine barrel (3), described hydraulic motor (6) is connected with screw rod (4) by reduction box (8), the output shaft of described injection cylinder (7) is connected with screw rod (4), it is characterized in that: described nozzle switching mechanism comprises plunger (9), end cap (10), connecting rod (11), bearing (12), described plunger (9) radially inserts in the nozzle body (2), be provided with sealing ring (13) between described plunger (9) and the nozzle body (2), described end cap (10) is enclosed within plunger (9) and goes up and screw on nozzle body (2), described plunger (9) is hinged with connecting rod (11) one ends, hinged in the middle of the described connecting rod (11) with bearing (12), described bearing (12) is fixed on the nozzle body (2), and the other end of described connecting rod (11) is connected with bar-link drive in order to drivening rod (11).
2. the injection device of screw injection molding machine according to claim 1, it is characterized in that: described bar-link drive is hydraulic jack (14), the piston (15) of described hydraulic jack (14) is hinged with connecting rod (11).
3. the injection device of screw injection molding machine according to claim 1, it is characterized in that: described injection device also comprises hydraulic pump (16), hydraulic control device (17), oil pipe I (18) and oil pipe II (19), described hydraulic pump (16) is communicated with hydraulic control device (17), described hydraulic control device (17) by oil pipe I (18) respectively with the bottom of hydraulic jack (14) and being communicated with of injection cylinder (7), hydraulic control device (17) also is communicated with the top and the hydraulic motor (6) of hydraulic jack (14) respectively through oil pipe II (19).
4. the injection device of screw injection molding machine according to claim 1 is characterized in that: respectively be provided with a pressure-reducing valve (20) on oil pipe I (18) between described hydraulic control device (17) and the hydraulic jack (14) and the oil pipe II (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205631233U CN201848982U (en) | 2010-10-15 | 2010-10-15 | Injection device of screw injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205631233U CN201848982U (en) | 2010-10-15 | 2010-10-15 | Injection device of screw injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201848982U true CN201848982U (en) | 2011-06-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205631233U Expired - Lifetime CN201848982U (en) | 2010-10-15 | 2010-10-15 | Injection device of screw injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201848982U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059785A (en) * | 2010-10-15 | 2011-05-18 | 中国计量学院 | Injection device for screw-type injection machine |
| CN102310517A (en) * | 2011-07-08 | 2012-01-11 | 常州工学院 | Piezoelectric dynamic plasticizing forming device and injection molding method thereof |
-
2010
- 2010-10-15 CN CN2010205631233U patent/CN201848982U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059785A (en) * | 2010-10-15 | 2011-05-18 | 中国计量学院 | Injection device for screw-type injection machine |
| CN102059785B (en) * | 2010-10-15 | 2013-03-27 | 中国计量学院 | Injection device for screw-type injection machine |
| CN102310517A (en) * | 2011-07-08 | 2012-01-11 | 常州工学院 | Piezoelectric dynamic plasticizing forming device and injection molding method thereof |
| CN102310517B (en) * | 2011-07-08 | 2014-04-09 | 常州工学院 | Piezoelectric dynamic plasticizing forming device and injection molding method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110601 Effective date of abandoning: 20130327 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110601 Effective date of abandoning: 20130327 |
|
| RGAV | Abandon patent right to avoid regrant |