CN103702818B - Screw injection device - Google Patents
Screw injection device Download PDFInfo
- Publication number
- CN103702818B CN103702818B CN201280034296.8A CN201280034296A CN103702818B CN 103702818 B CN103702818 B CN 103702818B CN 201280034296 A CN201280034296 A CN 201280034296A CN 103702818 B CN103702818 B CN 103702818B
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- Prior art keywords
- mentioned
- screw
- return ring
- ball
- screw head
- Prior art date
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- Expired - Fee Related
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- 238000002347 injection Methods 0.000 title claims abstract description 62
- 239000007924 injection Substances 0.000 title claims abstract description 62
- 238000010438 heat treatment Methods 0.000 claims abstract description 49
- 230000013011 mating Effects 0.000 claims abstract description 25
- 238000009434 installation Methods 0.000 claims abstract description 5
- 239000011347 resin Substances 0.000 claims description 78
- 229920005989 resin Polymers 0.000 claims description 78
- 230000033001 locomotion Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 230000002411 adverse Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 210000000078 claw Anatomy 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 206010013642 Drooling Diseases 0.000 description 1
- 206010039424 Salivary hypersecretion Diseases 0.000 description 1
- 208000008630 Sialorrhea Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003031 feeding effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 208000026451 salivation Diseases 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/52—Non-return devices
-
- 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
- B29C45/58—Details
- B29C45/60—Screws
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides and can implement at an easy rate and be difficult to produce the Screw injection device of biting, burning at the outer surface of non-return ring and the inner surface of heating cylinder.Screw rod (8) is by being formed with the screw body (31) of helicla flute (8a) and forming via the screw head (33) that the neck (32) of path is fixed on its leading section.In addition, prevent backflow device (40) by be fixed on screw body (31) screw head installation side end check plate (41) and can to rotate and the non-return ring (42) of neck (32) of can advancing, be installed on retreating is formed.End face in non-return ring (42) side of screw head (33) forms multiple balls with deep trouth portion (44a) and shallow slot portion (44b) and moves mating groove (44), configures rollably to be contained in each ball and to move ball (43) in mating groove (44) between screw head (33) and non-return ring (42).
Description
Technical field
The present invention relates to the Screw injection device that injection moulding machine possesses, particularly relate to the driving mechanism preventing adverse current non-return ring possessed at the neck of screw rod.
Background technology
The Screw injection device that injection moulding machine possesses is to metal pattern intracavitary administration, the device of filling the molten resin of ormal weight, in the heating cylinder that peripheral part is provided with the heater being referred to as band heater, can rotate and can advance, accommodate screw rod with retreating.Molten resin to the injection in metal die cavity, fill mixing by repeatedly carrying out resin and each operation such as plasticising, suck-back and injection, filling etc. is carried out.
In the mixing, plasticising operation of resin, screw rod is driven in rotation in heating cylinder.Raw material supplying hole is offered at the base end side of heating cylinder, this raw material supplying hole is used for the granular material resin fallen from hopper to import in heating cylinder, screw rod is formed with helicla flute, and this helicla flute extends to leading section from the position opposed with the raw material supplying hole being opened in heating cylinder.Therefore, if rotate drive screw in heating cylinder, then by raw material supplying hole, the material resin be supplied in heating cylinder is taken in by the inner surface of heating cylinder and the space that formed, spiral fluted surface, and along with the rotation of screw rod, is transferred to the front of screw rod along helicla flute successively.In this process, material resin melting because of the heating of heater, the shearing heating caused with the rotation of screw rod and frictional heating, thus carry out the mixing that needs and plasticising.Molten resin after plasticising is being formed at the resin reservoir between injection nozzle and the leading section of screw rod of installing in the leading section of heating cylinder with a certain amount of savings.
After the mixing, plasticising operation of end resin, in order to prevent the outflow of the molten resin from injection nozzle (salivation: drooling), make screw rod irrotationality rotatably retreat, and the suck-back carrying out the resin pressure reduced in resin reservoir.
In the injection, filling work procedure of molten resin, screw rod at full speed to injection nozzle side by forward drive.Thus, put aside a certain amount of molten resin in resin reservoir to metal pattern intracavitary administration, filling, thus the formed products desired by being shaped.
Screw rod is provided with and prevents backflow device, to make to put aside the base end side not turning back to screw rod at the molten resin of resin reservoir in the injection, filling work procedure of molten resin.Thus, stablizing to the resin filling amount in metal die cavity of per injection, thus the certified products that can be shaped with higher yield rate.
Propose before the applicant of the application as lower device, that is, prevent backflow device as what possess at screw rod, as shown in Fig. 6 and Fig. 7, comprising: the neck 101 via path is installed on the screw head 102 of the leading section of screw body 100; Be fixed on the check plate 103 of the installation side end of the screw head 102 of screw body 100; And can forward-reverse and the non-return ring 104 of neck 101 can be actively tied in rotatably, the locking claw 105 that and its end face outstanding to non-return ring 104 side becomes tabular surface is provided with in the rearward end of screw head 102, the recess 106 that is configured to hold locking claw 105 and outstanding and its end face becomes the fastener 107 of tabular surface (for example, referring to patent document 1 continuously and to screw head 102 side with this recess 106 is provided with in the end of screw head 102 side of non-return ring 104.)。Wherein, the symbol 109 of Fig. 6 and Fig. 7 represents the slot being formed at screw head 102, and symbol 110 represents the engagement pawl being formed at non-return ring 104.Engagement pawl 110 can slidably be inserted in slot 109, allows non-return ring 104 relative to the advance of screw head 102, retrogressing, and limits the rotation of non-return ring 104 relative to screw body 100 and screw head 102.
Below, the action of backflow device that prevents recorded in patent document 1 is described.First, in the mixing, plasticising operation of resin, screw body 100, screw head 102 and non-return ring 104 are by rotary actuation integratedly, pressed by the resin of the resin supplied along the helicla flute being formed at screw body 100 and press non-return ring 104 to screw head 102 thruster, thus as shown in Figure 6, the locking claw 105 of screw head 102 embeds in the recess 106 of non-return ring 104.Thus, non-return ring 104 is separated from check plate 103, opens the resin passage 108 be formed between check plate 103 and non-return ring 104, and the resin after mixing, plasticising is transferred to resin reservoir side.
After the mixing of resin, the end of plasticising operation, screw body 100, screw head 102 and non-return ring 104 are reversed some amounts.Thus, the locking claw 105 of screw head 102 departs from from the recess 106 of non-return ring 104, as shown in Figure 7, the locking claw 105 of screw head 102 and the fastener 107 of non-return ring 104 against each other with tabular surface.Now, non-return ring 104 is pushed by the locking claw 105 of screw head 102 and is close to check plate 103, thus close the resin passage 108 that is formed between check plate 103 and non-return ring 104, thus when preventing suck-back and injection, filling time the adverse current of molten resin.
Prior art document
Patent document
Patent document 1: Japan Patent No. 3432782 publication
Summary of the invention
Invent problem to be solved
But, in the technology recorded in patent document 1, in the mixing, plasticising operation of resin, because non-return ring 104 and screw body 100 and screw head 102 rotate integrally, thus produce between the outer surface and the inner surface of heating cylinder 200 of non-return ring 104 and rub, and easily between these each parts, produce the unfavorable conditions such as wearing and tearing, burn.Especially, when the injection moulding for fiber mixing resin, fiber easily enters between the outer surface of non-return ring 104 and the inner surface of heating cylinder 200, thus is more prone to produce above-mentioned unfavorable condition.In addition, in the technology recorded in patent document 1, need to implement special processing to screw head 102 and non-return ring 104 both sides, thus also have the problem that manufacturing cost uprises.
The present invention completes in order to the problem eliminating such conventional art, and its object is to provides following Screw injection device, that is, can implement at an easy rate, and is difficult to generation at the outer surface of non-return ring and the inner surface of heating cylinder and bites, burn.
For solving the scheme of problem
In order to solve above-mentioned problem, the present invention is following Screw injection device, it possesses heating cylinder, can rotate and can advance, be contained in the screw rod in this heating cylinder with retreating, and be installed on this screw rod prevent backflow device, above-mentioned screw rod is by having spiral fluted screw body, the screw head being fixed on the leading section of this screw body with the neck via path is formed, the above-mentioned backflow device that prevents is by the check plate of end of screw head installation side being fixed on above-mentioned screw body, with can rotate and can advance, be installed on above-mentioned neck non-return ring with retreating is formed, wherein, above-mentioned prevent backflow device by be formed at above-mentioned screw head above-mentioned non-return ring side end face and move mating groove along multiple balls that the circumference of above-mentioned screw head extends, with rollably can be accommodated in this ball and to move in mating groove and the ball that a part for its side face abuts with the end face being formed as plane above-mentioned non-return ring is formed, above-mentioned ball moves mating groove by deep trouth portion, shallow slot portion and link these deep trouth portions and shallow slot portion linking part form, when above-mentioned ball is configured in above-mentioned deep trouth portion, above-mentioned non-return ring is separated from above-mentioned check plate and can carries out the circulation of the molten resin above-mentioned neck, when above-mentioned ball is configured in above-mentioned shallow slot portion, above-mentioned non-return ring is close to above-mentioned check plate and can not carries out the circulation of the molten resin in above-mentioned neck.
According to such structure, due to rollably ball can be configured between screw head and non-return ring, and make a part for the side face of this ball be connected to the end face of non-return ring, even if so when the rotation of screw body and screw head, non-return ring also can not rotate relative to heating cylinder, thus prevents wearing and tearing, the burn of the outer surface of non-return ring and the inner surface of heating cylinder.In addition, because non-return ring is relative to heating cylinder non rotating, so be not easy to sandwich foreign matter between the outer surface and the inner surface of heating cylinder of non-return ring, thus also can carry out the shaping that fiber is mixed into resin expeditiously.And, mating groove is moved owing to forming the ball with deep trouth portion and shallow slot portion at the end face of screw head, carry out the opening and closing of non-return ring relative to check plate by means of being configured in this ball ball moved in mating groove, thus can reliably mode inject, when filling and suck-back time the adverse current of molten resin.And, because the ball bearing surface of non-return ring can be formed as tabular surface, so the minimizing of the processing cost of non-return ring and the manufacturing cost of Screw injection device can be realized.
Further, on the basis of the Screw injection device of said structure, the invention is characterized in, three above-mentioned balls are moved mating groove and equally spaced formed along the circumference of the end face of above-mentioned screw head.
According to such structure, the circumference due to the end face along screw head is equally spaced formed with ball and moves mating groove, so move three balls in mating groove can keep non-return rings with 3 by being contained in each ball, thus can improve the action stability of non-return ring.
Further, on the basis of the Screw injection device of said structure, the invention is characterized in, when being configured with above-mentioned ball in above-mentioned shallow slot portion, a part for the side face of above-mentioned ball is connected to the inner surface of above-mentioned heating cylinder.
According to such structure, due to molten resin injection, fill time, a part for the side face of ball is connected to the inner surface of heating cylinder, so stably can carry out the forward motion of screw rod, thus can prevent wearing and tearing, the burn of the outer surface of non-return ring and the inner surface of heating cylinder.
The effect of invention is as follows.
In Screw injection device of the present invention, due to rollably ball can be configured between screw head and non-return ring, and a part for the side face of this ball is abutted with the end face being formed as plane non-return ring, even if so when the rotation of screw body and screw head, non-return ring also can not rotate relative to heating cylinder, thus prevents wearing and tearing and the burn of the outer surface of non-return ring and the inner surface of heating cylinder.In addition, because non-return ring is relative to heating cylinder non rotating, so be not easy to sandwich foreign matter between the outer surface and the inner surface of heating cylinder of non-return ring, thus also can carry out the shaping that fiber is mixed into resin expeditiously.Further, because the ball bearing surface of non-return ring can be formed as tabular surface, so the processing cost of non-return ring can be reduced, thus the minimizing of the manufacturing cost of Screw injection device can be reduced.
Accompanying drawing explanation
Fig. 1 is the structure chart of the Screw injection device of embodiment.
Fig. 2 is the major part sectional view preventing the state of backflow device in mixing, plasticising operation representing that the Screw injection device of embodiment possesses.
Fig. 3 is the major part sectional view preventing the state of backflow device in injection, filling work procedure representing that the Screw injection device of embodiment possesses.
Fig. 4 is the A-A sectional view of Fig. 3.
Fig. 5 is the stereogram preventing the partial perspective of backflow device that the Screw injection device of embodiment possesses.
Fig. 6 is the sectional view preventing the state of backflow device in mixing, plasticising operation representing that the Screw injection device of past case possesses.
Fig. 7 is the sectional view preventing the state of backflow device in injection, filling work procedure representing that the Screw injection device of past case possesses.
Detailed description of the invention
Below, be described with reference to the Screw injection device of accompanying drawing to embodiment.
As shown in Figure 1, the Screw injection device of embodiment possesses: on not shown injecting unit basal disc, separate predetermined distance and the headstock 1 of opposed arranging and holding plate 2; The many connecting rods 3 set up between these headstock 1 and holding plates 2; Guided by these connecting rods 3 and the direct acting block 4 advancing between the headstock 1 and holding plate 2, retreat; Base end part is fixed on the heating cylinder 5 of the headstock 1; Be installed on the nozzle 6 of the front end of heating cylinder 5; Be wound in the band heater 7 of the periphery of heating cylinder 5; And arrange as can rotate in heating cylinder 5 and the screw rod 8 advancing, retreat.The base end part of screw rod 8 is held in rotary body 9, and rotary body 9 can be held in direct acting block 4 rotatably via bearing 9a.In addition, be fixed with passive belt wheel 10 at rotary body 9, hang between this passive belt wheel 10 and driving pulley 12 and be wound with not shown Timing Belt, this driving pulley 12 is fixed on the output shaft of the measurement servo motor 11 being equipped on direct acting block 4.Therefore, screw rod 8 drives via the measured servo motor 11 of driving pulley 12, not shown Timing Belt, passive belt wheel 10 and rotary body 9 and rotates.
Holding plate 2 carries injection servo motor 13, and the lead screw shaft 16 of ball screw framework 15 can be kept rotatably via bearing 2a.Ball screw framework 15 is formed by lead screw shaft 16 with the nut body 17 that this lead screw shaft 16 is screwed, and direct acting block 4 is fixed on via force cell unit 18 in the end of nut body 17.Have passive belt wheel 19 at the end winding support of lead screw shaft 16, this passive belt wheel 19 and be fixed on injection servo motor 13 output shaft driving pulley 14 between hang and have not shown Timing Belt around (Wheels hangs け).Therefore, screw rod 8 is driven by injection servo motor 13 via driving pulley 14, not shown Timing Belt, passive belt wheel 19, ball screw framework 15, direct acting block 4 and rotary body 9 and carries out advancing, retreating.Force cell unit 18 detects the injection pressure to not shown metal pattern intracavitary administration molten resin.
In addition, the symbol 20 in figure represents the moulding material supply hole being arranged in the position of the correspondence of the headstock 1 and heating cylinder 5, and this moulding material supply hole 20 is supplied in the rearward end of heating cylinder 5 for the moulding material being fallen by never illustrated hopper, supply.
As shown in Figures 1 to 5, screw rod 8 is made up of the screw body 31 with helicla flute 8a and the screw head 33 that is fixed on the leading section of screw body 31 via the neck 32 of path, possesses prevent backflow device 40 at neck 32.
As shown in Figures 2 to 5, prevent backflow device 40 by screw head 33, be fixed on the end of the screw head installation side of screw body 31 check plate 41, can rotate and the non-return ring 42 of the neck 32 that can advance, be installed on retreating and being formed with the ball (steel ball) 43 that the mode that can roll is configured between screw head 33 and non-return ring 42.
As shown in Figures 2 to 5, be equally spaced formed with at the end face of non-return ring 42 side of screw head 33 three balls extended along its circumference and move mating groove 44.Each ball moves mating groove 44 with identical towards being partially formed with deep trouth portion 44a, shallow slot portion 44b and linking the linking part 44c in these each portions.
As shown in Figure 2, deep trouth portion 44a is formed as follows, and namely, when ball 43 enters deep trouth portion 44a, check plate 41 is separated with non-return ring 42, and molten resin can by being formed at the resin passage 45 between check plate 41 and non-return ring 42.On the other hand, as shown in Figure 3, shallow slot portion 44b is formed as follows, and namely, when ball 43 enters shallow slot portion 44b, check plate 41 and non-return ring 42 are close to, and interdicts the resin passage 45 be formed between check plate 41 and non-return ring 42.In addition, for mating groove 44 is moved for ball deep trouth portion 44a, shallow slot portion 44b and linking part 44c, its forming position is adjusted in the mode making a part for the side face of ball 43 always contact with the inner surface of heating cylinder 5.
Below, the action of the Screw injection device of the embodiment formed as described above is described.For the Screw injection device of embodiment, by in the driving of each forming period control survey servo motor 11 and injection servo motor 13 and stopping, coming repeatedly to carry out successively the mixing of resin, plasticising operation, the injection of suck-back and molten resin, filling work procedure.
In the mixing, plasticising operation of resin, based on the instruction from not shown control device, drive measurement servo motor 11 to make it to rotate to prescribed direction, and make it to rotate to prescribed direction via driving pulley 12, not shown Timing Belt, passive belt wheel 10 and rotary body 9 drive screw 8.By the rotation of this screw rod 8, never illustrated hopper is by the Internal back end side base feed resin of raw material supplying hole 20 to heating cylinder 5.Plasticized and the mixing of this material resin is also forwards transferred due to the leading screw feeding effect of screw rod 8, becomes molten resin and is stored in the front side of screw rod 8.Send into molten resin along with the front side to screw rod 8 and screw rod 8 is retreated, but now, based on the instruction from not shown control device, control to carry out drived control to injection servo motor 13 with pressure feedback, and control the rectilinear movement position of screw rod 8, thus give the back pressure with regulation to screw rod 8.And, when the front at screw rod 8 stores the molten resin of a shot when, stop the rotary actuation of measurement servo motor 11 pairs of screw rods 8.
As mentioned above, in the mixing, plasticising operation of resin, screw rod 8 is rotated by driving, and the resin after plasticising is transferred to the front of screw rod 8 successively, so non-return ring 42 due to by helicla flute 8a by the resin pressure of resin transferred, and be pushed to screw head 33 side.In addition, now, owing to being equipped with ball 43 between screw head 33 and non-return ring 42, even if so drive screw 8 makes it to rotate, non-return ring 42 also can not rotate relative to heating cylinder 5, thus screw body 31 and non-return ring 42 are along the relatively displacement of its circumference.Therefore, ball 43 enters the deep trouth portion 44a that ball moves mating groove 44, and as shown in Figure 2, non-return ring 42 is separated from check plate 41, thus open the resin passage 45 be formed between check plate 41 and non-return ring 42, and the resin after mixing, plasticising is given to resin reservoir sidesway.
After the mixing of resin, the end of plasticising operation, screw rod 8 is reversed some amounts.Now, owing to being equipped with ball 43 between screw head 33 and non-return ring 42, so non-return ring 42 can not rotate relative to heating cylinder 5, thus screw body 31 and non-return ring 42 are along its circumferential relative displacement, and the deep trouth portion 44a that ball 43 moves mating groove 44 from ball enters shallow slot portion 44b by linking part 44c.Now, because screw rod 8 is not to mixing, the rotary actuation of plasticising direction of resin, the resin pressure in helicla flute 8a is lower, so non-return ring 42 easily retreats to check plate 41 side.Thus, non-return ring 42 is close to check plate 41, thus interdicts the resin passage 45 be formed between check plate 41 and non-return ring 42.
After this, carry out making screw rod Final 8 system retreat ormal weight and reduce the suck-back of the resin pressure in resin reservoir.During suck-back, based on the instruction from not shown control device, it is towards the direction contrary with the direction of rotation in injection, filling work procedure that injection servo motor 13 controls by drived control with pressure feedback.If drive injection servo motor 13 to make it to rotate, then this rotary motion is via driving pulley 14, not shown Timing Belt, passive belt wheel 19 and be passed to ball screw framework 15, and by ball screw framework 15, rotary motion is transformed to rectilinear motion.And this rectilinear motion is passed to screw rod 8 via force cell unit 18, direct acting block 4 and rotary body 9, thus drive screw 8 makes it to retreat.During suck-back, the resin pressure in the resin pressure ratio molten resin reservoir of screw body 31 side is high, but owing to making non-return ring 42 be close to check plate 41 by ball 43, so non-return ring 42 is not separated from check plate 41, thus prevents the adverse current of molten resin.
Injection, the filling work procedure of molten resin carry out in the following way, the suitable opportunity namely, after suck-back terminates, and based on the instruction from not shown control device, carry out drived control with speed feedback control to injection servo motor 13.If drive injection servo motor 13 to make it to rotate, then this rotary motion is passed to screw rod 8 via the path identical with during suck-back, drive screw 8 makes it to run, the molten resin being stored in the front of screw rod 8 is injected to be filled to and is in the metal die cavity of matched moulds state, thus performs shot operation.In the pressurize operation of then shot operation, based on the instruction from not shown control device, control to carry out drived control to injection servo motor 13 with pressure feedback, thus, the packing pressure set is additional to the resin be filled to from screw rod 8 in metal pattern.In the injection, filling work procedure of molten resin, because the resin pressure of resin pressure ratio screw body 31 side in molten resin reservoir is high, so non-return ring 42 can not be separated from check plate 41, thus prevent the adverse current of molten resin.
In the screw injection unit of present embodiment, owing to can rollably configure ball 43 between screw head 33 and non-return ring 42, and make a part for the side face of this ball 43 be connected to the end face of non-return ring 42, even if so when the rotation of screw rod 8, non-return ring 42 also can not rotate relative to heating cylinder 5, thus can prevent wearing and tearing, the burn of the outer surface of non-return ring 42 and the inner surface of heating cylinder 5.In addition, because non-return ring 42 is relative to heating cylinder 5 non rotating, so be difficult to sandwich foreign matter between the outer surface and the inner surface of heating cylinder 5 of non-return ring 42, thus also the shaping that fiber is mixed into resin can be carried out expeditiously.And, in the screw injection unit of present embodiment, mating groove 44 is moved owing to forming the ball with deep trouth portion 44a and shallow slot portion 44b at the end face of screw head 33, and carry out the opening and closing of non-return ring 42 relative to check plate 41 via being configured in the ball 43 that this ball moves in mating groove 44, so can reliably prevent from injecting, when filling and suck-back time the adverse current of molten resin.In addition, in the screw injection unit of present embodiment, ball bearing surface due to non-return ring 42 is tabular surface, so with implement the situation of the special processing preventing adverse current at non-return ring 42 compared with, the processing cost of non-return ring 42 can be reduced, thus the minimizing of the manufacturing cost of Screw injection device can be realized.
In addition, in the screw injection unit of present embodiment, circumference due to the end face along screw head 33 is equally spaced formed with three balls and moves mating groove 44, so move three balls 43 in mating groove 44 can keep non-return rings 43 with 3 by being contained in each ball, thus the action stability of non-return ring 42 can be improved.In addition, in the screw injection unit of present embodiment, due to the inner surface making the part being contained in the ball 43 that ball moves in mating groove 44 always be connected to heating cylinder 5, so stably can carry out the spinning movement of screw rod 8 and advance, backward movement, and wearing and tearing, the burn of the outer surface of non-return ring 42 and the inner surface of heating cylinder 5 can be prevented.
Industrial utilizability
The present invention can be used in Screw injection device or screw rod preformed formula injection device.
The explanation of symbol
1-headstock, 2-holding plate, 3-connecting rod, 4-direct acting block, 5-heating cylinder, 6-nozzle, 7-band heater, 8-screw rod, 8a-helicla flute, 9-rotary body, 10-passive belt wheel, 11-measurement servo motor, 12-driving pulley, 13-injection servo motor, 14-driving pulley, 15-ball screw framework, 16-lead screw shaft, 17-nut body, 18-force cell unit, 19-passive belt wheel, 20-moulding material supply hole, 31-screw body, 32-neck, 33-screw head, 40-prevent backflow device, 41-check plate, 42-non-return ring, 43-ball (steel ball), 44-ball moves mating groove, 44a-deep trouth portion, 44b-shallow slot portion, 44c-linking part.
Claims (3)
1. a Screw injection device, it possesses heating cylinder, can rotate and can advance, be contained in the screw rod in this heating cylinder with retreating and be installed on this screw rod prevent backflow device, above-mentioned screw rod is made up of the screw head with spiral fluted screw body and the leading section of being fixed on this screw body via the neck of path, above-mentioned prevent backflow device by be fixed on above-mentioned screw body screw head installation side end check plate and can to rotate and the non-return ring of the above-mentioned neck that can advance, be installed on retreating is formed
The feature of above-mentioned Screw injection device is,
Above-mentioned prevent backflow device by be formed at above-mentioned screw head above-mentioned non-return ring side end face and move mating groove along multiple balls that the circumference of above-mentioned screw head extends, with rollably can be accommodated in this ball and to move in mating groove and the ball that a part for its side face abuts with the end face being formed as plane above-mentioned non-return ring is formed, above-mentioned ball moves mating groove by deep trouth portion, shallow slot portion and link these deep trouth portions and shallow slot portion linking part form, when above-mentioned ball is configured in above-mentioned deep trouth portion, above-mentioned non-return ring is separated from above-mentioned check plate and can carries out the circulation of the molten resin above-mentioned neck, when above-mentioned ball is configured in above-mentioned shallow slot portion, above-mentioned non-return ring is close to above-mentioned check plate and can not carries out the circulation of the molten resin in above-mentioned neck.
2. Screw injection device according to claim 1, is characterized in that,
Three above-mentioned balls are moved mating groove equally spaced to be formed along the circumference of the end face of above-mentioned screw head.
3. Screw injection device according to claim 1 and 2, is characterized in that,
When being configured with above-mentioned ball in above-mentioned shallow slot portion, a part for the side face of above-mentioned ball is connected to the inner surface of above-mentioned heating cylinder.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011153974A JP5732336B2 (en) | 2011-07-12 | 2011-07-12 | Screw type injection device |
| JP2011-153974 | 2011-07-12 | ||
| PCT/JP2012/067101 WO2013008698A1 (en) | 2011-07-12 | 2012-07-04 | Screw injection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103702818A CN103702818A (en) | 2014-04-02 |
| CN103702818B true CN103702818B (en) | 2016-01-27 |
Family
ID=47505989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280034296.8A Expired - Fee Related CN103702818B (en) | 2011-07-12 | 2012-07-04 | Screw injection device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5732336B2 (en) |
| CN (1) | CN103702818B (en) |
| WO (1) | WO2013008698A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107813470B (en) * | 2017-10-13 | 2019-08-23 | 永康市昱华塑料制品有限公司 | A kind of anti-reversing clutch of injection molding extruder head lever driving |
| JP7209882B2 (en) * | 2018-04-19 | 2023-01-20 | 東洋機械金属株式会社 | screw head |
| CN110001015B (en) * | 2019-05-20 | 2021-04-30 | 台州市永硕汽车部件有限公司 | Injection molding screw of injection molding machine |
| CN115139474A (en) * | 2022-06-27 | 2022-10-04 | 博创智能装备股份有限公司 | Laminating plasticizing device for injection molding machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295913A (en) * | 1999-11-12 | 2001-05-23 | 住友重机械工业株式会社 | Countetflow prevention apparatus and injection device operation method |
| JP3432782B2 (en) * | 2000-03-02 | 2003-08-04 | 東洋機械金属株式会社 | Injection equipment of injection molding machine |
| CN101181814A (en) * | 2006-11-14 | 2008-05-21 | 东芝机械株式会社 | Backflow prevention device for in-line screw-type injection molding machine |
| JP4126257B2 (en) * | 2003-09-16 | 2008-07-30 | 住友重機械工業株式会社 | Screw head structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3247272A1 (en) * | 1982-12-21 | 1984-06-28 | Krauss-Maffei AG, 8000 München | BACKFLOW LOCK |
| US4988281A (en) * | 1989-09-07 | 1991-01-29 | Husky Injection Molding Systems Ltd. | Valve assembly for injection molding machine |
| JP3015629U (en) * | 1995-03-09 | 1995-09-05 | ワン ジュイ−シァン | Screw rod for injection of raw material of injection pipe of plastic injection molding machine |
| JPH0911291A (en) * | 1995-06-28 | 1997-01-14 | Japan Steel Works Ltd:The | Backflow preventing apparatus for injection molding machine |
| JP2006515815A (en) * | 2003-01-27 | 2006-06-08 | コミュニティー エンタープライジズ， エルエルシー | Apparatus and method for maximizing purge effectiveness for a molding machine |
| JP4434715B2 (en) * | 2003-12-12 | 2010-03-17 | 東芝機械株式会社 | Screw backflow prevention device |
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2011
- 2011-07-12 JP JP2011153974A patent/JP5732336B2/en active Active
-
2012
- 2012-07-04 WO PCT/JP2012/067101 patent/WO2013008698A1/en active Application Filing
- 2012-07-04 CN CN201280034296.8A patent/CN103702818B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295913A (en) * | 1999-11-12 | 2001-05-23 | 住友重机械工业株式会社 | Countetflow prevention apparatus and injection device operation method |
| JP3432782B2 (en) * | 2000-03-02 | 2003-08-04 | 東洋機械金属株式会社 | Injection equipment of injection molding machine |
| JP4126257B2 (en) * | 2003-09-16 | 2008-07-30 | 住友重機械工業株式会社 | Screw head structure |
| CN101181814A (en) * | 2006-11-14 | 2008-05-21 | 东芝机械株式会社 | Backflow prevention device for in-line screw-type injection molding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5732336B2 (en) | 2015-06-10 |
| JP2013018210A (en) | 2013-01-31 |
| WO2013008698A1 (en) | 2013-01-17 |
| CN103702818A (en) | 2014-04-02 |
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