CN212764616U

CN212764616U - Injection system of injection molding machine

Info

Publication number: CN212764616U
Application number: CN202021621567.8U
Authority: CN
Inventors: 杨志高
Original assignee: Shenzhen Daoming Mould Plastic Technology Co ltd
Current assignee: Shenzhen Daoming Mould Plastic Technology Co ltd
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2021-03-23
Anticipated expiration: 2030-08-05

Abstract

The utility model belongs to the technical field of the injection molding machine and specifically relates to an injection molding machine injection system is related to, its injection barrel that includes the level setting and wrap up in heating plate on the injection barrel lateral wall, the internal one end threaded connection of injection barrel has the injection screw rod through driving system drive, injection barrel top is provided with feed channel, its characterized in that: and one end of the interior of the injection cylinder body, which is far away from the injection cylinder body, is provided with a stirring structure which is driven by the injection screw and is used for stirring along the axial direction. This application has when injecting polychrome plastics, improves the effect of the degree of consistency of injecting plastics.

Description

Injection system of injection molding machine

Technical Field

The application relates to the field of injection molding machines, in particular to an injection system of an injection molding machine.

Background

The injection system of the injection molding machine is one of the core parts of the injection molding machine, and has three structures of plunger type, screw type and screw pre-molding plunger injection type. The most widely used at present is the screw injection system, which has the principle that after a certain amount of plastic is heated and plasticized within a specified time in one cycle of a plastic injection machine, the molten plastic is injected into a mold cavity through a screw at a certain pressure and speed, and after the injection is finished, the molten material injected into the mold cavity is kept in a fixed shape. The screw type injection system mainly comprises a plasticizing device and a power transmission device, wherein the plasticizing device mainly comprises a feeding device, a charging barrel, a screw, a glue passing assembly and a nozzle part; the power transmission device comprises an injection oil cylinder, an injection seat moving oil cylinder and a screw rod driving device (a glue melting motor).

For example, chinese patent with publication number CN104690878A discloses a plastic injection system, which comprises a base, a shock-absorbing layer is arranged on the base, a plastic injection cylinder is arranged on the base, one end of the charging barrel is connected with a hydraulic cylinder, the hydraulic cylinder is connected with the plastic injection cylinder through a main shaft of the cylinder, a left-going oil injection hole and a right-going oil injection hole are arranged on the hydraulic cylinder, a hopper is arranged above the hydraulic cylinder, a charging opening is arranged on the hopper, a charging barrel heating system is arranged at the other end of the plastic injection cylinder, the charging barrel heating system is connected with a nozzle, the nozzle injects molten plastic into a die assembly cavity through the injection system, the molten plastic is cooled and formed in the die assembly cavity, a die locking mechanism is arranged outside the die assembly cavity, a heating screw is arranged in the plastic injection cylinder for uniformly heating materials and stirring, and a.

In view of the above-mentioned related art, the inventors have considered that there is a drawback that when multi-color (two or more colors) plastics are injected, the injected plastics are not mixed uniformly enough.

SUMMERY OF THE UTILITY MODEL

In order to improve the uniformity of plastic injection when injecting multi-colored plastic, the application provides an injection system of an injection molding machine.

The application provides an injection molding machine injection system adopts following technical scheme:

the utility model provides an injection molding machine injection system, including the injection barrel of level setting and wrap up in heating plate on the injection barrel lateral wall, the internal one end threaded connection of injection barrel has the injection screw rod through driving system drive, injection barrel top is provided with feed channel, its characterized in that: and one end of the interior of the injection cylinder body, which is far away from the injection cylinder body, is provided with a stirring structure which is driven by the injection screw and is used for stirring along the axial direction.

Through adopting above-mentioned technical scheme, during the use, it is internal that polychrome injection plastics pass through feedstock channel and get into the injection tube, along with injection screw's rotation, the stirring structure moves thereupon, and injection plastics melts gradually and is brought into the injection screw front end, and the injection plastics that just flows out the injection screw front end provide stirring structure stirring, extrude at last the injection barrel and get into injection mold in can, so when injecting polychrome plastics, can effectively improve the degree of consistency of injection plastics, and the structure is succinct compact.

Preferably, the stirring structure includes the transfer line one and the transfer line two of coaxial setting, the injection screw rod is located the internal terminal surface middle part of injection tube be provided with the transfer line one complex of sliding groove that slides, be provided with spacing slider on the transfer line one, the groove that slides along self length direction be provided with spacing slider complex spacing spout that slides, the internal keeping away from of injection tube the one end of injection screw rod radially is provided with the montant, the transfer line two is kept away from the one end of injection screw rod rotate connect in the middle part of montant, the transfer line two with be provided with the gearbox that is used for making the rotational speed of transfer line two be greater than the rotational speed of transfer line one between the transfer line one, the interval radially is provided with a plurality of layers of stirring.

Through adopting above-mentioned technical scheme, during the use, along with the rotation of injection screw, dwang one rotates along with it, dwang two rotates with the rotational speed that is greater than a dwang rotational speed under the effect of gearbox, and injection plastics melts gradually and is brought into the injection screw front end, and the injection plastics that just flows out the injection screw front end come to stir the leaf department and are stirred, at last extruded injection barrel and get into injection mold in can, so, stirring leaf rotational speed takes to promote for stirring effect is better.

Preferably, the gearbox including set up in box on the injection barrel inner wall, transfer line one and transfer line two are close to the one end of box is provided with respectively and is located gear one and gear two in the box, just the number of teeth of gear one is greater than the number of teeth of gear two, it is connected with the dead lever to rotate in the box, fixedly connected with gear three and gear four on the dead lever, gear three with gear two is the same and with gear one meshes mutually, gear four with gear one is the same and with gear two meshes mutually.

Through adopting above-mentioned technical scheme, make the low rotational speed of dwang one convert the high rotational speed of dwang two through the cooperation of gear one, two, three and four, so simple structure facilitates the use.

Preferably, the injection cylinder body is further provided with a turbulent flow filter plate which is displaced from the middle of the stirring blades in a radial direction, a plurality of rows of obliquely arranged filter holes are arranged on the turbulent flow filter plate at intervals, the inclination directions of the filter holes in each row are consistent, and the inclination directions of the filter holes in two adjacent rows are symmetrically arranged along the axial direction.

Through adopting above-mentioned technical scheme, injection plastics come to the other side back from turbulent flow filter plate one side through the filtration pore, can be so that injection plastics change relatively in the position on the horizontal plane to improve the effect of mixing.

Preferably, the injection screw is provided with the fixed cover on the end face of the sliding groove, the fixed cover is movably sleeved on the first transmission rod, one end, far away from the injection screw, of the fixed cover is provided with a chamfer to form an inclined plane, and the inclined plane is connected to the outer side wall and the inner side wall of the fixed cover.

Through adopting above-mentioned technical scheme, the existence on inclined plane makes injection screw when extrusion injection plastics, not only can assist injection plastics to get into the groove that slides, can also scrape the injection plastics on the dwang one in advance in step for operation that equipment can be better.

Preferably, one end of the fixed sleeve, which is close to the injection screw, is provided with a connecting ring, and the connecting ring is connected to the injection screw through a bolt.

Through adopting above-mentioned technical scheme, the fixed cover is convenient for install and dismantle in setting up of go-between.

Preferably, the inner wall of the injection cylinder is provided with a limiting lug, and the limiting lug is positioned on one side of the stirring structure close to the injection screw.

Through adopting above-mentioned technical scheme, the setting of spacing lug prevents that the injection screw from excessively rotating and destroying the gearbox.

Preferably, one end of the injection cylinder body, which is far away from the injection screw rod, is communicated with a discharge pipe, the discharge pipe is positioned below the injection cylinder body, and a valve is arranged on the discharge pipe.

Through adopting above-mentioned technical scheme, arrange the setting of row material pipe and can retrieve remaining injection plastics through spouting row material pipe in the later stage.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the injection device is used, multicolor injection plastic enters the injection cylinder body through the feeding channel, the rotating rod I rotates along with the rotation of the injection screw rod, the rotating rod II rotates at a rotating speed higher than that of the rotating rod I under the action of the gearbox, the injection plastic is gradually melted and brought into the front end of the injection screw rod, the injection plastic which just flows out of the front end of the injection screw rod comes to the stirring blade to be stirred, and finally the injection plastic is extruded out of the injection cylinder body and enters the injection mold;

2. after the injection plastic comes from one side of the turbulent flow filter plate to the other side through the filter holes, the position of the injection plastic on the horizontal plane can be relatively changed, so that the mixing effect is improved;

3. the existence on inclined plane makes injection screw when extrusion injection plastics, not only can assist injection plastics to get into the groove that slides, can also scrape the injection plastics on the dwang one in advance in step for the operation that equipment can be better.

Drawings

Fig. 1 is a schematic diagram of the overall structure of an embodiment of an injection system of an injection molding machine according to the present application.

Fig. 2 is a schematic cross-sectional view in a vertical plane of an embodiment of an injection system of an injection molding machine of the present application.

Description of reference numerals: 1. an injection cylinder; 11. a heating plate; 12. a feed channel; 13. a limiting bump; 14. a discharge pipe; 141. a valve; 2. an injection screw; 21. an alternating current motor; 22. a back-flow prevention valve; 23. a sliding groove; 231. a limiting chute; 24. fixing a sleeve; 241. an inclined surface; 242. a connecting ring; 3. a stirring structure; 31. a first transmission rod; 311. a limiting slide block; 312. a first gear; 32. a second transmission rod; 321. a second gear; 33. a vertical rod; 34. a gearbox; 341. a box body; 342. fixing the rod; 343. a third gear; 344. a fourth gear; 35. stirring blades; 36. a turbulent flow filter plate; 361. and (5) filtering holes.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses an injection system of an injection molding machine. Referring to fig. 1 and 2, the injection system of the injection molding machine comprises an injection cylinder 1 horizontally arranged and a heating plate 11 wrapped on the outer side wall of the injection cylinder 1, one end in the injection cylinder 1 is connected with an injection screw 2 driven by a power system in a threaded manner, the power system can adopt an alternating current motor 21, a back-stop valve 22 is arranged on the end surface of one end of the injection screw 2 positioned in the injection cylinder 1, a feeding channel 12 is arranged above the injection cylinder 1, the feeding channel 12 is close to one end of the injection cylinder 1 provided with the injection screw 2,

referring to fig. 1 and 2, an end of the inside of the injection cylinder 1 away from the injection cylinder 1 is provided with a stirring structure 3 driven by the injection screw 2 for performing a stirring work in an axial direction. Specifically, the stirring structure 3 includes a first transmission rod 31 and a second transmission rod 32, which are coaxially disposed, wherein the first transmission rod 31 is closer to the injection screw 2 than the second transmission rod. A sliding groove 23 which is matched with the first transmission rod 31 in a sliding manner is formed in the middle of the end face, located in the injection cylinder 1, of the injection screw 2, the sliding groove 23 is circular, and the central axis of the sliding groove 23 is coaxial with the central axis of the injection screw 2; the side wall of the first transmission rod 31 is provided with a limiting slide block 311, the limiting slide block 311 is positioned at one end of the first transmission rod 31 close to the injection screw 2, a limiting slide groove 231 matched with the limiting slide block 311 in a sliding manner is arranged on the inner side wall of the sliding groove 23 along the length direction of the limiting slide groove, and two ends of the limiting slide groove 231 are respectively communicated with the end surface of one end of the injection screw 2 positioned in the injection cylinder 1 and the groove bottom of the sliding groove 23.

Referring to fig. 2, meanwhile, a fixing sleeve 24 is arranged on the end face of the injection screw 2 provided with the sliding groove 23, the fixing sleeve 24 is movably sleeved on the first transmission rod 31, a chamfer is arranged at one end of the fixing sleeve 24 away from the injection screw 2 and forms an inclined surface 241, and the inclined surface 241 is connected to the outer side wall and the inner side wall of the fixing sleeve 24. One end of the fixed sleeve 24 close to the injection screw 2 is provided with a connecting ring 242, the side surface of the connecting ring 242 close to the injection screw 2 is attached to the end surface of the injection screw 2, and the connecting ring 242 is connected to the injection screw 2 through bolts.

Referring to fig. 2, a vertical rod 33 is radially arranged at one end, far away from the injection screw 2, in the injection cylinder 1, two ends of the vertical rod 33 are fixedly connected with the inner wall of the injection cylinder 1, one end, far away from the injection screw 2, of the transmission rod two 32 is rotatably connected to the middle of the vertical rod 33, and a gearbox 34 used for enabling the rotating speed of the transmission rod two 32 to be larger than that of the transmission rod one 31 is arranged between the transmission rod two 32 and the transmission rod one 31. Specifically, the gearbox 34 includes a case 341 disposed on an inner wall of the injection cylinder 1, an upper end of the case 341 is fixedly connected to an inner wall of the injection cylinder 1, one end of the first transmission rod 31 and one end of the second transmission rod 32 close to the case 341 are respectively provided with a first gear 312 and a second gear 321 located in the case 341, a number of teeth of the first gear 312 is greater than a number of teeth of the second gear 321, the case 341 is rotatably connected with a fixed rod 342, the fixed rod 342 is located above the first transmission rod 31 and the second transmission rod 32, the fixed rod 342 is fixedly connected with a third gear 343 and a fourth gear 344, the third gear 343 is identical to the second gear 321 and is meshed with the first gear 312, and the fourth gear 344 is identical to the first gear 312 and.

Referring to fig. 2, a plurality of layers of stirring blades 35 are radially disposed on the second transmission rod 32 at uniform intervals, in this embodiment, four layers of stirring blades 35 may be disposed on the stirring blades 35, and meanwhile, a turbulent flow filter plate 36 that displaces the middle portion of the four layers of stirring blades 35 is radially disposed in the injection cylinder 1, that is, two layers of stirring blades 35 are disposed on two sides of the turbulent flow filter plate 36, a plurality of rows of obliquely disposed filter holes 361 are disposed on the turbulent flow filter plate 36 at intervals, in this embodiment, twelve layers of filter holes 361 may be disposed, the oblique directions of the filter holes 361 in each row are the same, and the inclination of the filter holes 361 in two adjacent rows are symmetrically disposed along the axial direction. In this way, after the injected plastic passes through the filter holes 361 from one side of the turbulent filter plate 36 to the other side, the position of the injected plastic on the horizontal plane can be relatively changed, and the mixing effect can be improved.

Referring to fig. 2, in addition, a limiting bump 13 is arranged on the inner wall of the injection cylinder 1, the limiting bump 13 is located on one side of the stirring structure 3 close to the injection screw 2, in this embodiment, the number of the limiting bumps 13 may be two, two limiting bumps 13 are located on the same horizontal plane and are respectively fixedly connected to the inner side wall of the injection cylinder 1, and the arrangement of the limiting bumps 13 prevents the injection screw 2 from excessively rotating to damage the gearbox 34. Meanwhile, one end of the injection cylinder body 1, which is far away from the injection screw 2, is communicated with a discharge pipe 14, the discharge pipe 14 is positioned below the injection cylinder body 1, and a valve 141 is arranged on the discharge pipe 14, so that residual injection plastic can be recovered through the discharge pipe 14 in the later period.

The implementation principle of the injection system of the injection molding machine in the embodiment of the application is as follows: when the injection molding machine is used, multicolor injection plastic enters the injection cylinder body 1 through the feeding channel 12, the rotating rod I and the rotating rod II rotate along with the rotation of the injection screw 2, the injection plastic is gradually melted and brought into the front end of the injection screw 2, the injection plastic which just flows out of the front end of the injection screw 2 comes to a stirring blade 35, close to the gearbox 34, on one side of the turbulent flow filter plate 36 to be stirred, then further mixes the injection plastic through the filter holes 361 of the turbulent flow filter plate 36, then stirs the injection plastic again at the hinge joint on the other side of the turbulent flow filter plate 36 after passing through the turbulent flow filter plate 36, and finally extrudes the injection cylinder body 1 and enters an injection mold.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an injection molding machine injection system, including the injection barrel (1) that the level set up and wrap up in heating plate (11) on injection barrel (1) lateral wall, one end threaded connection in injection barrel (1) has injection screw (2) through driving system drive, injection barrel (1) top is provided with feed channel (12), its characterized in that: the injection barrel (1) is internally provided with a stirring structure (3) which is driven by the injection screw (2) and used for stirring along the axial direction, wherein one end of the injection barrel (1) is far away from the injection barrel (1).

2. The injection molding machine injection system of claim 1, wherein: the stirring structure (3) comprises a first transmission rod (31) and a second transmission rod (32) which are coaxially arranged, the middle part of the end face of the injection screw (2) in the injection barrel body (1) is provided with a sliding groove (23) matched with the first transmission rod (31) in a sliding manner, the first transmission rod (31) is provided with a limiting slide block (311), the sliding groove (23) is provided with a limiting slide groove (231) matched with the limiting slide block (311) in a sliding manner along the length direction of the sliding groove, one end of the injection barrel body (1) far away from the injection screw (2) is radially provided with a vertical rod (33), one end of the second transmission rod (32) far away from the injection screw (2) is rotatably connected to the middle part of the vertical rod (33), and a gearbox (34) used for enabling the rotating speed of the second transmission rod (32) to be larger than the rotating speed of the first transmission rod (31) is arranged between the, and a plurality of layers of stirring blades (35) are radially arranged on the second transmission rod (32) at intervals.

3. The injection molding machine injection system of claim 2, wherein: the gearbox (34) comprises a box body (341) arranged on the inner wall of the injection cylinder body (1), a first gear (312) and a second gear (321) which are located in the box body (341) are respectively arranged at one end, close to the box body (341), of the first transmission rod (31) and the second transmission rod (32), the number of teeth of the first gear (312) is larger than that of the second gear (321), a fixing rod (342) is rotatably connected in the box body (341), a third gear (343) and a fourth gear (344) are fixedly connected to the fixing rod (342), the third gear (343) is identical to the second gear (321) and meshed with the first gear (312), and the fourth gear (344) is identical to the first gear (312) and meshed with the second gear (321).

4. The injection molding machine injection system of claim 2, wherein: the injection device is characterized in that a turbulence filter plate (36) which is displaced for a plurality of layers is arranged in the injection cylinder body (1) in the radial direction, a plurality of rows of obliquely arranged filter holes (361) are arranged on the turbulence filter plate (36) at intervals, the oblique directions of the filter holes (361) in each row are consistent, and the inclination of the filter holes (361) in two adjacent rows are symmetrically arranged along the axial direction.

5. The injection molding machine injection system of claim 2, wherein: the injection screw (2) is provided with the terminal surface in groove (23) that slides is provided with fixed cover (24), fixed cover (24) activity cup joint in transfer line (31), fixed cover (24) are kept away from the one end of injection screw (2) is provided with the chamfer and forms inclined plane (241), inclined plane (241) are connected to the lateral wall and the inside wall of fixed cover (24).

6. The injection molding machine injection system of claim 5, wherein: the fixed sleeve (24) is close to one end of the injection screw (2) and is provided with a connecting ring (242), and the connecting ring (242) is connected to the injection screw (2) through a bolt.

7. The injection molding machine injection system of claim 1, wherein: and a limiting bump (13) is arranged on the inner wall of the injection cylinder body (1), and the limiting bump (13) is positioned on one side, close to the injection screw (2), of the stirring structure (3).

8. The injection molding machine injection system of claim 1, wherein: the injection screw rod (2) is far away from one end of the injection cylinder body (1) and is communicated with a material discharge pipe (14), the material discharge pipe (14) is located below the injection cylinder body (1), and a valve (141) is arranged on the material discharge pipe (14).