Disclosure of Invention
The invention aims to provide a nozzle for an injection molding machine, which is used for preventing backflow and solving the problem that the liquid backflow phenomenon is easy to occur in the injection molding process of the injection molding machine in the market in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a nozzle for an injection molding machine for preventing backflow comprises a connecting pipe, an injection head, rolling balls, fan blades, an auger and a cast aluminum heating coil for the injection molding machine nozzle, wherein a first limiting block is integrally arranged on the outer side of the connecting pipe, external threads are integrally arranged on the outer side of the right side of the connecting pipe, a feed inlet is formed in the right side of the inside of the connecting pipe, a material guide opening is formed in the left side of the feed inlet, a material discharge opening is formed in the left side of the material guide opening, the injection head is connected with the left side of the connecting pipe in a threaded mode, a second limiting block is integrally arranged on the outer side of the injection head, an installation through groove is formed in the injection head, a jet opening is formed in the left side of the installation through groove, a material guide inner pipe is installed in the installation through groove, the rolling balls are arranged between the material inner pipe and the installation through groove, and a sliding rail is integrally arranged on the right side of the material guide inner pipe, the spout has all been seted up to the right flank of injector head and the left surface of connecting pipe, the slide rail sets up the inside at the spout, the inside right side of guide inner tube is provided with the connecting rod, and the outside an organic whole of connecting rod is provided with the flabellum to the one end welding of flabellum is at the inner wall of guide inner tube, the inside main shaft that is provided with in left side of guide inner tube, and the outside an organic whole of main shaft is provided with the auger to the auger welding is at the inner wall of guide inner tube, the inside welding of jet has the guide piece, and the guide piece sets up the left side at the guide inner tube, the outside of connecting pipe and injector head all nests has the injection molding machine nozzle with cast aluminium heating coil.
Preferably, the right side of the first limiting block is provided with an external thread, and the first limiting block and the second limiting block are both in a regular octagonal structure.
Preferably, the feed inlet is the horn mouth structural design, and feed inlet, guide opening and bin outlet three's central line coincide each other to the bin outlet is the horn mouth structure and establishes.
Preferably, the central line of the injector head and the central line of the connecting pipe are overlapped, the left side of the injector head is designed in a circular arc structure, and the right side surface of the injector head is parallel to the left side surface of the connecting pipe.
Preferably, the gap between the right side surface of the material guiding inner tube and the left side surface of the connecting tube is 0.01-0.02mm, and the center line of the material guiding inner tube and the center line of the connecting tube are overlapped.
Preferably, the inner diameter of the right side of the material guide inner tube is smaller than the inner diameter of the left side of the discharge port, the material guide inner tube is in clearance fit with the injection head, rolling balls are uniformly distributed between the material guide inner tube and the injection head, and the rolling balls are arranged at the inclined positions of the material guide inner tube and the injection head.
Preferably, the slide rail is provided with 4, and the slide rail is the annular structure design to the end of slide rail is convex structure snake mouth, and the slide rail is the one-to-one correspondence with the spout moreover, and the slide rail constitutes sliding structure in the inside of spout simultaneously.
Preferably, the right side of connecting rod is conical structural design, and the outside of connecting rod is the angle such as be provided with the flabellum to the central line of connecting rod and the central line of guide inner tube coincide each other, and the guide inner tube passes through the flabellum and the connecting rod constitutes revolution mechanic moreover.
Preferably, the left and right sides of main shaft all is conical structural design, and the central line of main shaft and the central line of guide inner tube coincide each other, the external diameter of auger equals guide inner tube left side internal diameter, and the auger passes through the guide inner tube and constitutes revolution mechanic.
Preferably, the interior of the material guide block is designed to be of a bell-mouthed structure, the maximum inner diameter of the material guide block is larger than the inner diameter of the left side of the material guide inner tube, and the center line of the material guide block and the center line of the material guide inner tube are overlapped.
Compared with the prior art, the invention has the beneficial effects that: this prevent nozzle for injection molding machine of backward flow:
1. the device is provided with the fan blades and the packing auger, in the using process, the fan blades are impacted by liquid to drive the material guiding inner tube to rotate, so that the material guiding inner tube drives the packing auger to rotate, the plastic solution is effectively stirred, meanwhile, the plastic solution is prevented from being blocked, the practicability of the device is increased, and after the injection molding is finished, the design of the packing auger greatly increases the difficulty of liquid backflow and effectively avoids the backflow of the liquid, so that the device has the functions of one-way current limiting and blockage prevention, the function of the device is greatly increased, and the application range of the device is enlarged;
2. be provided with spin, slide rail and spout, at the in-process that uses, the normal rotation of guide inner tube has not only been guaranteed in the cooperation of three use, and the design of slide rail and spout has simultaneously avoided liquid to flow out from between guide inner tube and the connecting pipe, has increased the leakproofness of device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, the present invention provides a technical solution: a nozzle for an injection molding machine for preventing backflow comprises a connecting pipe 1, a first limiting block 2, external threads 3, a feed inlet 4, a material guide opening 5, a material discharge opening 6, an injection head 7, a second limiting block 8, an installation through groove 9, an injection opening 10, a material guide inner pipe 11, a rolling ball 12, a slide rail 13, a slide groove 14, a connecting rod 15, fan blades 16, a main shaft 17, an auger 18, a material guide block 19 and a cast aluminum heating coil 20 for the injection molding machine nozzle, wherein the first limiting block 2 is integrally arranged on the outer side of the connecting pipe 1, the external threads 3 are integrally arranged on the outer side of the right side of the connecting pipe 1, the feed inlet 4 is formed in the right side of the connecting pipe 1, the material guide opening 5 is formed in the left side of the feed inlet 4, the material discharge opening 6 is formed in the left side of the material guide opening 5, the injection head 7 is in threaded connection with the left side of the connecting pipe 1, the second limiting block 8 is integrally arranged on the outer side of the injection head 7, and the through groove 9 is formed in the injection head 7, the left side of the injector head 7 is provided with an injector orifice 10, the injector orifice 10 is arranged on the left side of the installation through groove 9, a material guide inner pipe 11 is arranged inside the installation through groove 9, a rolling ball 12 is arranged between the material guide inner pipe 11 and the installation through groove 9, the right side of the material guide inner pipe 11 is integrally provided with a slide rail 13, the right side of the injector head 7 and the left side of the connecting pipe 1 are both provided with slide grooves 14, the slide rail 13 is arranged inside the slide groove 14, the right side of the inside of the material guide inner pipe 11 is provided with a connecting rod 15, the outer side of the connecting rod 15 is integrally provided with a fan blade 16, one end of the fan blade 16 is welded on the inner wall of the material guide inner pipe 11, the left side of the material guide inner pipe 11 is internally provided with a main shaft 17, the outer side of the main shaft 17 is integrally provided with an auger 18, the auger 18 is welded on the inner wall of the material guide inner pipe 11, the injector orifice 10 is internally welded with a material guide block 19, and the material guide block 19 is arranged on the left side of the material guide inner pipe 11, and cast aluminum heating coils 20 for nozzles of the injection molding machine are nested on the outer sides of the connecting pipe 1 and the injection head 7.
The right side of first stopper 2 is provided with external screw thread 3, and first stopper 2 all is regular octagon structure with second stopper 8, and the design of above-mentioned structure has made things convenient for the installation and the dismantlement of connecting pipe 1 and injector head 7, increases the convenience of device.
Feed inlet 4 is horn mouth structural design, and feed inlet 4, guide opening 5 and the central line of bin outlet 6 three coincide each other to bin outlet 6 is the horn mouth structure and establishes, and the design of above-mentioned structure makes things convenient for the inflow of plastic solution, has guaranteed the steady of the liquid velocity of flow simultaneously.
The central line of the injection head 7 coincides with the central line of the connecting pipe 1, the left side of the injection head 7 is in a circular arc structure design, the right side face of the injection head 7 is parallel to the left side face of the connecting pipe 1, the design of the structure ensures that liquid in the connecting pipe 1 can normally flow into the material guiding inner pipe 11 in the injection head 7, and meanwhile, due to the design of the circular arc structure, the injection head 7 is convenient to contact with a die.
The gap between the right side surface of the material guide inner pipe 11 and the left side surface of the connecting pipe 1 is 0.01-0.02mm, and the central line of the material guide inner pipe 11 and the central line of the connecting pipe 1 are overlapped with each other, so that the plastic solution is prevented from flowing out of the gap between the material guide inner pipe 11 and the connecting pipe 1 by the structural design, and the normal use of the device is ensured.
The inner diameter of the right side of the guide inner tube 11 is smaller than the inner diameter of the left side of the discharge port 6, the guide inner tube 11 is in clearance fit with the injection head 7, rolling balls 12 are uniformly distributed between the guide inner tube 11 and the injection head 7, the rolling balls 12 are arranged at the inclined positions of the guide inner tube 11 and the injection head 7, the design of the structure guarantees the stability of the rotation of the guide inner tube 11, and the normal use of the device is guaranteed.
Slide rail 13 is provided with 4, and slide rail 13 is the ring structure design to the end of slide rail 13 is arc structure snake mouth, and slide rail 13 is the one-to-one relation with spout 14 moreover, and slide rail 13 constitutes sliding construction in the inside of spout 14 simultaneously, and the design of above-mentioned structure not only effectually supports guide inner tube 11, has increased the leakproofness between guide inner tube 11 and the connecting pipe 1 simultaneously, avoids the outflow of liquid.
The right side of connecting rod 15 is conical structural design, and the angle such as the outside of connecting rod 15 is provided with flabellum 16, and the central line of connecting rod 15 and the central line of guide inner tube 11 coincide each other, and guide inner tube 11 passes through flabellum 16 and connecting rod 15 and constitutes revolution mechanic, the design of above-mentioned structure, effectually carry out the water conservancy diversion to liquid, thereby make liquid flow through from flabellum 16, under the impulsive force of liquid, make flabellum 16 rotate under the effect of impulsive force, and then make flabellum 16 drive guide inner tube 11 rotatory, the rotation of follow-up auger 18 has been ensured, the normal use of device has been guaranteed.
The left and right sides of main shaft 17 all is conical structural design, and the central line of main shaft 17 and the central line of guide inner tube 11 coincide each other, the external diameter of auger 18 equals guide inner tube 11 left side internal diameter, and auger 18 constitutes revolution mechanic through guide inner tube 11, the design of above-mentioned structure, make auger 18 at the effectual liquid discharge of pivoted in-process, when the inside screw rod feed back of feed cylinder, because flabellum 16 lacks the impact force of liquid, so make flabellum 16 can not rotate, and then make auger 18 can not rotate, the phenomenon of the feed back takes place for the liquid inside the mould to have been avoided, and auger 18's design, effectual stirring to liquid, the inside problem of taking place to block up of guide inner tube 11 has been avoided.
The inside of the material guide block 19 is designed to be in a horn mouth structure, the maximum inner diameter of the material guide block 19 is larger than the inner diameter of the left side of the material guide inner tube 11, and the center line of the material guide block 19 is overlapped with the center line of the material guide inner tube 11.
The working principle is as follows: when the nozzle for an injection molding machine for preventing backflow is used, firstly, as shown in fig. 1-2, the device is connected to a charging barrel of the injection molding machine through the external thread 3 of the connecting pipe 1, and at the same time, as shown in fig. 7, the installation of the connecting pipe 1 is facilitated due to the design of the first stopper 2 of the regular octagon, and then as shown in fig. 1-3, the line of the cast aluminum heating coil 20 for the nozzle of the injection molding machine is connected to the injection molding machine, so that the nozzle is used.
In the using process, as shown in fig. 1, the plastic solution inside the cylinder flows to the nozzle under the action of the screw, so as to enter the feed inlet 4 of the connecting pipe 1, and under the action of the feed inlet 4, the material guiding opening 5 and the discharge opening 6, the liquid enters the material guiding inner pipe 11 inside the spray head 7, as shown in fig. 1 and 4, and simultaneously the impact force of the liquid effectively impacts the fan blade 16, so that the fan blade 16 rotates together with the connecting rod 15, so that as shown in fig. 1 and 4-5, the material guiding inner pipe 11 rotates inside the spray head 7 under the action of the rolling ball 12, the sliding rail 13 and the sliding chute 14, so that the auger 18 on the left side of the material guiding inner pipe 11 rotates, so that the auger 18 not only stirs the solution, but also conducts a unidirectional guiding operation on the solution, as shown in fig. 1 and 6, the liquid is discharged from the material guiding inner pipe 11, so as to enter the material guiding block 19 inside the spray head 10, and finally discharged from the guide block 19.
When the liquid is discharged and the material is returned from the charging barrel, as shown in fig. 1, the fan blade 16 lacks the impact force of the liquid, so that the fan blade 16 cannot drive the material guiding inner tube 11 to rotate, the packing auger 18 cannot rotate, the difficulty of liquid backflow is increased, and the liquid backflow phenomenon is avoided.
To thereby carry out a series of tasks, the contents of which are not described in detail in the present specification are prior art well known to those skilled in the art.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.