CN215969779U - Injection molding equipment with pushing mechanism - Google Patents

Abstract

The utility model discloses injection molding equipment with a pushing mechanism, wherein an injection assembly comprises an injection frame, a charging barrel, an injection cylinder and a screw rod rotating assembly, the charging barrel is arranged on the injection frame, the injection frame is connected with one end of a die assembly through an injection moving assembly, the charging barrel is communicated with the die assembly, the other end of the die assembly is connected with a hydraulic control device, a screw rod is rotationally arranged in the charging barrel, and the screw rod rotating assembly is connected with the screw rod; the hydraulic control device comprises a die assembly driving cylinder, the die assembly driving cylinder comprises a first plunger which does telescopic reciprocating displacement motion, and the die assembly driving cylinder is characterized in that a first plunger cavity, a first flow channel and a second flow channel are arranged at two ends of the first plunger cavity respectively, a second plunger is arranged in the first plunger cavity, a first piston is arranged on the second plunger, and the first piston is arranged between the first flow channel and the second flow channel. The second plunger is arranged in the first plunger in a built-in mode, so that the length of the whole pushing mechanism is reduced, and the size of the injection molding machine is reduced.

Description

Injection molding equipment with pushing mechanism

Technical Field

The utility model relates to the technical field of injection molding equipment, in particular to injection molding equipment with a pushing mechanism.

Background

An injection molding machine, also known as an injection molding machine or an injection molding machine, is a main molding device for molding thermoplastic plastics or thermosetting plastics into plastic products of various shapes by using a plastic molding mold. The injection mechanism is one of indispensable components in an injection machine, generally has three main forms of plunger type, screw type and screw pre-molding plunger injection type, and the most widely applied form is the screw type. The working principle is that plastic particles are melted by heating, high pressure is applied to the melted high-temperature plastic fluid under the pushing of a screw of an injection machine, the high-temperature plastic fluid is injected into a closed mold cavity through an injection head for molding, and a plastic product is formed after cooling and demolding.

The last drive movable mould action of present injection molding machine adopts the thrust gear of two hydro-cylinder structures when carrying out the die sinking or closing mould, however the double oil cylinder structure among the prior art is fixed in the overall structure of little hydro-cylinder in the piston rod tip of big hydro-cylinder to make the thrust gear length overlength that the injection molding machine was used, lead to the volume of injection molding machine great, be not convenient for transport, area occupied during the installation is great.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical defects and provides the injection molding equipment with the pushing mechanism, which is designed for reducing the length of the pushing structure so as to further reduce the volume of an injection molding machine

The utility model is mainly realized by the following technical scheme:

the injection molding equipment with the pushing mechanism comprises an injection assembly, a mold closing assembly and a hydraulic control device which are sequentially arranged, wherein the injection assembly comprises an injection frame, a material barrel, an injection cylinder and a screw rod rotating assembly, the material barrel is arranged on the injection frame, the injection frame is connected with one end of the mold closing assembly through a jet moving assembly, the material barrel is communicated with the mold closing assembly, the other end of the mold closing assembly is connected with the hydraulic control device, a screw rod is rotationally arranged in the material barrel, and the screw rod rotating assembly is connected with the screw rod; the hydraulic control device comprises a die assembly driving cylinder, the die assembly driving cylinder comprises a first plunger which does telescopic reciprocating displacement motion, and the die assembly driving cylinder is characterized in that a first plunger cavity, a first flow channel and a second flow channel are arranged at two ends of the first plunger cavity respectively, a second plunger is arranged in the first plunger cavity, a first piston is arranged on the second plunger, and the first piston is arranged between the first flow channel and the second flow channel.

Preferably, the screw rotating assembly comprises a mounting seat, the mounting seat is slidably mounted on the injection frame, a rotating shaft of a hydraulic motor is mounted on the mounting seat and connected with the screw through a belt transmission mechanism, an injection cylinder is mounted on the injection frame, and a piston rod of the injection cylinder is connected with the mounting seat.

Preferably, a pushing cavity is formed between the rear side surface of the first piston and the inner side end surface of the first plunger cavity, the pushing cavity is communicated with the second flow channel, and the diameter of the pushing cavity is larger than that of the first plunger cavity; a first sealing ring is arranged between the outer wall of the outer side end of the second plunger and the inner wall of the outer side end opening of the first plunger cavity; and a leakage passage is arranged at the outer side port of the first plunger cavity.

Preferably, the die assembly component comprises a plurality of support rods, and a fixed die plate and a movable die plate which are arranged oppositely, the fixed die plate is connected with the injection moving component and is arranged on the support rods, the fixed die plate is provided with a first through hole a through which the feeding cylinder passes, and the movable die plate is movably arranged on the support rods and is connected with the hydraulic control device.

Preferably, the mold closing assembly further comprises a limiting plate arranged on the supporting rod, the movable mold plate is located between the limiting plate and the fixed mold plate, and a hydraulic control device is arranged on the limiting plate.

Preferably, the movable template is provided with a bumper connected with the limiting plate.

Preferably, the end part of the lower synchronizing wheel shaft is provided with a mounting groove, a convex key is transversely arranged on the inner wall of the mounting groove, a groove a parallel to the axial direction is arranged on the outer side wall of the end part of the screw rod, and the convex key is arranged in the groove a in a matching manner.

Preferably, a first sliding rail is installed on the injection frame, a fixed block is arranged on the installation seat, a first sliding block is installed on the fixed block, and the first sliding block is arranged on the first sliding rail in a sliding mode.

Preferably, the device further comprises a bridge, a second sliding rail is mounted on the bridge, a second sliding block is arranged at the bottom of the mounting seat, and the second sliding block is arranged on the second sliding rail in a sliding mode.

Preferably, a containing cavity is formed in the material barrel, the screw is arranged in the containing cavity in a matched mode, a feed inlet a and an injection head are arranged on the material barrel, an exit port a is formed in the injection head, and the containing cavity is communicated with the feed inlet a and the exit port a respectively.

Compared with the prior art, the technical scheme of the utility model has the beneficial effects that:

the injection molding equipment with the pushing mechanism provided by the utility model has the advantages that the second plunger is arranged in the first plunger in a built-in mode to carry out reciprocating displacement of the first plunger to drive the movable mold in the mold to act, so that the length of the whole pushing mechanism is reduced, and the volume of the injection molding machine is further reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an injection molding apparatus with an eccentric tension injection machine according to the present invention;

FIG. 2 is a schematic structural view of an injection assembly provided by the present invention;

FIG. 3 is a top view of the injection assembly provided by the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a schematic structural view of a clamping assembly and a hydraulic control device according to the present invention;

FIG. 6 is a schematic structural diagram (one) of a hydraulic control apparatus provided by the present invention;

FIG. 7 is an enlarged view of portion A of FIG. 6;

FIG. 8 is an enlarged view of portion B of FIG. 6;

fig. 9 is a schematic structural view (ii) of the hydraulic control apparatus provided by the present invention, in which the second plunger is omitted;

fig. 10 is a schematic structural diagram (three) of a hydraulic control apparatus provided by the present invention;

fig. 11 is a schematic structural diagram (four) of the hydraulic control apparatus provided by the present invention;

fig. 12 is a schematic structural diagram (five) of the hydraulic control apparatus provided by the present invention;

FIG. 13 is an enlarged view of section C of FIG. 12;

FIG. 14 is a schematic structural view of a screw rotation assembly provided by the present invention;

fig. 15 is an exploded schematic view of a screw rotation assembly provided by the present invention.

The reference numbers are as follows:

100. the injection assembly, 200, the mold closing assembly, 300, the hydraulic control device, 400, the injection moving assembly, 1, the mounting seat, 2, the eccentric tensioning assembly, 3, the upper synchronous wheel shaft, 4, the lower synchronous wheel shaft, 5, the first synchronous wheel, 6, the second synchronous wheel, 7, the synchronous belt, 8, the front eccentric wheel, 9, the rear eccentric wheel, 10, the tensioning wheel shaft, 11, the tensioning wheel, 12, the adjusting part, 13, the first sliding rail, 14, the fixing block, 15, the first sliding block, 16, the pressing ring, 20, the injection frame, 20a, the first through hole, 21, the charging barrel, 21a, the feeding hole, 22, the injection cylinder, 23, the screw rotating assembly, 24, the screw, 24a, the groove, 25, the hydraulic motor, 26, the bridge frame, 27, the second sliding rail, 28, the second sliding block, 29, the injection head, 29a, the exit port, 30, the injection moving cylinder, 31, the connecting rod, 40, the supporting rod, 41, the fixed mold plate, 42, 41, the injection mold plate, the injection hole, the injection cylinder, the injection, A movable die plate, 43, a limit plate, 44, a bumper bar, 50, a die closing driving cylinder, 51, an ejector pin push plate, 52, a top plate guide rod, 501, a ring groove, 502, a first cylinder cover, 503, a first plunger, 504, a cylinder body, 505, a booster plunger, 506, a booster cavity, 507, a first flow space, 508, a second flow space, 509, a fifth flow space, 510, a first piston, 511, a second plunger, 512, a first flow passage, 513, a second flow passage, 514, a pushing cavity, 515, a leakage passage, 521, a blocking piece, 522, a fourth oil inlet, 531, a first plunger cavity, 532, a third piston, 540, a second plunger cavity, 541, a first oil inlet, 542, a second oil inlet, 543, a third oil inlet, 544, a fourth flow space, 545, a first flow cavity, 546, an annular protrusion, 547, a second flow cavity, 548, a second end cover, 549, a third end cover, 551, a flow splitting port, 552. pressurizing channel, 561, pressurizing space, 571, second piston, 572, through hole, 573, moving chamber.

Detailed Description

In order that those skilled in the art will better understand the utility model and thus more clearly define the scope of the utility model as claimed, it is described in detail below with respect to certain specific embodiments thereof. It should be noted that the following is only a few embodiments of the present invention, and the specific direct description of the related structures is only for the convenience of understanding the present invention, and the specific features do not of course directly limit the scope of the present invention. Such alterations and modifications as are made obvious by those skilled in the art and guided by the teachings herein are intended to be within the scope of the utility model as claimed.

Example (b):

as shown in the accompanying drawings, an injection molding apparatus with a pushing mechanism comprises an injection assembly 100, a mold clamping assembly 200 and a hydraulic control device 300, which are sequentially arranged, wherein the injection assembly 100 comprises an injection frame 20, a material barrel 21, an injection cylinder 22 and a screw rod rotating assembly 23, the material barrel 21 is mounted on the injection frame 20, the injection frame 20 is connected with one end of the mold clamping assembly 200 through an injection moving assembly 400, the material barrel 21 is communicated with the mold clamping assembly (200), the other end of the mold clamping assembly 200 is connected with the hydraulic control device 300, a screw rod 24 capable of moving along the axial direction of the material barrel 21 is rotatably arranged in the material barrel 21, and the screw rod rotating assembly 23 is connected with the screw rod 24; the hydraulic control device comprises a die assembly driving cylinder, the die assembly driving cylinder comprises a first plunger 503 which does telescopic reciprocating displacement motion, a first plunger cavity 531, a first flow channel 512 and a second flow channel 513 which are respectively positioned at two ends of the first plunger cavity 531 are arranged on the first plunger 503, a second plunger 511 is arranged in the first plunger cavity 531, a first piston 510 is arranged on the second plunger 511, the first piston 510 is positioned between the first flow channel 512 and the second flow channel 513, a rubber sealing ring is sleeved on the first piston 510, and the outer wall of the rubber sealing ring is tightly attached to the inner wall of the first plunger cavity 531.

The second plunger 511 is arranged in the first plunger 503 in a built-in mode, so that the first plunger 503 is reciprocated and displaced to drive the ejector plate 51 in the mold to act, the length of the hydraulic control device 300 is reduced, and the volume of the injection molding machine is further reduced.

Further, in order to make the oil enter and have enough pressure to push the first piston 510 to act, a pushing cavity 514 is formed between the back side surface of the first piston 510 and the inner side end surface of the first plunger cavity 531, the diameter of the pushing cavity 514 is larger than that of the first plunger cavity 531, the pushing cavity 514 is communicated with the second flow channel 513, when the oil enters the pushing cavity 514 through the second flow channel 513, the oil generates pushing force to push the first piston 510 and the second plunger 511 to move outwards, so that the moving die in the die is pushed to displace towards the fixed die direction in the die (namely, the moving die plate of the die assembly displaces towards the fixed die plate of the die assembly), and in the process, the oil is not supplied to the first flow channel; when oil is input into the first flow passage and enters the first plunger cavity, the first plunger cavity generates pushing force to push the first piston and the first plunger to move towards the rear side, so that the moving die of the die is pulled to move towards the rear side, the second flow passage does not supply oil in the process, and the first plunger is stretched according to the mode.

Preferably, a first sealing ring is arranged between the outer wall of the outer end of the second plunger 511 and the inner wall of the outer end of the first plunger cavity 531, a leakage passage 515 is arranged at the outer end of the first plunger cavity 531, the first sealing ring is embedded in the annular groove 501 of the outer end of the first plunger cavity 531 to position the first sealing ring, the first sealing ring is arranged to prevent leakage of oil in the first plunger cavity, and meanwhile, the leakage passage is arranged to recover the oil through the leakage passage after the oil seeps into the outer end of the first plunger cavity, so that the oil is prevented from leaking to the outside.

Further preferably, the plunger piston structure further comprises a first end cover 502, the first end cover 502 covers the outer side port of the first plunger cavity 531, the outer side end of the second plunger 511 penetrates through the center hole of the first end cover 502, a first sealing ring is arranged between the inner wall of the center hole of the first end cover 502 and the outer wall of the outer side end of the second plunger 511, a channel communicated with the leakage channel 515 is arranged on the first end cover, the first sealing ring is embedded in the ring groove 501 of the inner wall of the center hole of the first end cover 502, and the first end cover is fixedly connected with the first plunger through a bolt.

In the embodiment, the mold closing driving cylinder further comprises a cylinder body 504 and a second piston 571, the cylinder body 504 is provided with a second piston cavity 540, a first oil inlet 541, a second oil inlet 542 and a pressurizing plunger 505, an annular protrusion 546 is arranged on the inner wall of the middle part of the second piston cavity 540, so that the second piston cavity 540 is partitioned into a first flow cavity 545 and a second flow cavity 547 communicated with the second oil inlet 542, the first plunger 503 is placed in the first flow cavity 545, the second piston 571 is placed in the second flow cavity 547, the first plunger 503 is provided with the pressurizing cavity 506, the pressurizing plunger 505 penetrates through the through hole of the second piston 571 and is inserted into the pressurizing cavity 506, a pressurizing space 561 is reserved between the pressurizing cavity 506 and the pressurizing plunger 505, the pressurizing plunger 505 is provided with a pressurizing channel 552 communicated with the first oil inlet 541, the front end and the rear end of the second piston 571 form a first flow space 507 and a second flow space 508 in the second flow cavity 547 respectively, a through hole 572 is arranged on the second piston 571, the through hole 572 communicates the first flow space 507 and the second flow space 508, a moving cavity 573 communicating with the first flow space 507 is reserved between a perforation of the second piston 571 and the pressure plunger 505, a branch flow port 551 communicating the moving cavity 573 with the pressure channel 552 is arranged on the pressure plunger 505, the first oil inlet 541 and the second oil inlet 542 can be selectively connected to an oil tank, so that hydraulic oil can be recycled, a blocking member 521 is arranged between the pressure channel and the pressure plunger 505, wherein the blocking member is a rubber sealing ring embedded in an annular groove at the port of the pressure channel 552, and the blocking member 521 can separate the pressure cavity 506 from the second flow space 508, so as to prevent the hydraulic oil in the pressure channel 561 from entering the second flow space 508, so as to ensure that the hydraulic pressure of the pressure cavity 506 is stable, and further, the first plunger 503 can be pushed straight, the first plunger 503 is provided with a third piston 532, and the outer wall of the third piston 532 is attached to the inner wall of the second plunger cavity 540, and a sealing ring is arranged.

Preferably, the cylinder 504 is provided with a third oil inlet 543, a fourth flow space 544 communicated with the third oil inlet 543 is left between the second piston 571 and the cylinder 504, the cylinder 504 is provided with a fourth oil inlet 522, and a fifth flow space 509 is left between the first plunger 503 and the first flow chamber.

Preferably, the two ports of the second plunger cavity 540 are respectively covered with a second end cover 548 and a third end cover 549, the first plunger 503 penetrates through the central hole of the second end cover 548, a second sealing ring is arranged between the inner wall of the central hole of the second end cover 548 and the first plunger 503, a sealing ring is also embedded in the third end cover 549 to realize sealing, the end covers are all fixed on the cylinder body through bolts, and meanwhile, the pressurizing plunger and the first oil inlet 541 are both arranged on the third end cover and are combined into an integrated structure.

The implementation principle of the mold closing driving cylinder is as follows: when the die is required to be closed, hydraulic oil enters the pressurizing channel 552 of the pressurizing plunger 505 from the first oil inlet 541, the hydraulic oil flows into the pressurizing space 561 along the pressurizing channel of the pressurizing plunger 505, the hydraulic oil entering the pressurizing space 561 further pushes the first plunger 503 to move towards the outer side, the second flow space 508 is gradually enlarged in the moving process of the first plunger 503, and the hydraulic oil is sucked into the second flow space 508 from the second oil inlet 542 due to pressure difference with the outside and then pushes the first plunger 503 to move towards the outer side; when the inside of the pressure boost plunger 505 is filled with hydraulic oil, the hydraulic oil is not sucked from the second oil inlet 542 any more, the hydraulic oil enters from the diversion port 551 and fills the moving cavity 573, and further pushes the second piston 571 to seal the second oil inlet 542, so that the hydraulic oil is prevented from leaking from the second oil inlet 542 when passing through the through hole 572, the hydraulic oil flows into the second flow space 508 through the through hole 572, the hydraulic oil entering the second flow space 508 pushes the first plunger 503 to move in the outer direction, and since the hydraulic oil in the pressure boost cavity 506 and the second flow space 508 pushes the first plunger 503 at the same time, the pushing speed of the first plunger 503 is increased, the working time is reduced, and the working efficiency is improved. When the first plunger 503 needs to retreat, hydraulic oil is injected from the third oil inlet 543 and the fourth oil inlet 522 at the same time, and after the fifth flowing space 509 is filled with the hydraulic oil, the first plunger 503 is pushed to move towards the second piston 571, so that the pressurizing cavity 506 and the second flowing space 508 are reduced, and the hydraulic oil in the pressurizing cavity 506 exits from the first oil inlet 541; after the other side of the hydraulic oil fills the fourth flow space 544, the second piston 571 is pushed away from the first plunger 503, so that the second oil inlet 542 is communicated with the second flow space 508, the hydraulic oil in the second flow space 508 can exit from the second oil inlet 542, and the first plunger 503 can retreat.

In this embodiment, the screw rotation assembly 23 includes a mounting base 1, the mounting base 1 is slidably mounted on an injection frame 20, a hydraulic motor 25 is mounted on the mounting base 1, a rotating shaft of the hydraulic motor is connected to a screw through a belt transmission mechanism, an injection cylinder 22 is mounted on the injection frame 20, a piston rod of the injection cylinder 22 is connected to the mounting base, specifically, an eccentric tensioning mechanism 2 is further mounted on the mounting base 1, an upper synchronizing wheel shaft 3 and a lower synchronizing wheel shaft 4 which are parallel to each other are rotatably mounted on the mounting base 1, a first synchronizing wheel 5 is mounted on the upper synchronizing wheel shaft 3, a second synchronizing wheel 6 is mounted on the lower synchronizing wheel shaft 4, one end of the lower synchronizing wheel shaft 4 is rotatably connected to the piston rod of the injection cylinder 22, the other end of the lower synchronizing wheel shaft 4 is connected to a screw 24, the first synchronizing wheel 5 is drivingly connected to the second synchronizing wheel 6 through a synchronizing belt 7, the eccentric tensioning mechanism 2 comprises a front eccentric wheel 8, a rear eccentric wheel 9, a tensioning wheel shaft 10 and a tensioning wheel 11, the front eccentric wheel 8 and the rear eccentric wheel 9 are arranged on the mounting base 1 in a relative rotating mode, the tensioning wheel shaft 10 is eccentrically arranged between the front eccentric wheel 8 and the rear eccentric wheel 9, the tensioning wheel shaft 10 is provided with the tensioning wheel 11 abutting against the side face of the synchronous belt 7, the tensioning wheel shaft 10 is arranged in parallel with the upper synchronous wheel shaft 3, and the front eccentric wheel 8 or the rear eccentric wheel 9 is provided with an adjusting part 12; wherein the lower synchronizing wheel shaft 4 is rotatably connected with the piston rod of the injection cylinder 22 through a bearing.

Specifically, the tip of lower synchronizing wheel axle 4 is equipped with the mounting groove, is equipped with the convex key along transversely on the inner wall of mounting groove, is equipped with the recess 24a with axial direction parallel on the tip lateral wall of screw rod 24, and the convex key cooperation is installed in recess 24 a. The lower synchronizing wheel shaft 4 and the screw rod 24 can be conveniently installed, and when the lower synchronizing wheel shaft 4 and the screw rod 24 are not used, the lower synchronizing wheel shaft 4 can be separated from the screw rod 24 under the driving of the piston rod of the injection cylinder 22.

Specifically, the adjusting portion 12 is an adjusting groove provided on the outer end surface of the front eccentric wheel 8 or the rear eccentric wheel 9.

Preferably, the two adjustment slots are spaced apart to facilitate rotational adjustment of the front eccentric 8 or the rear eccentric 9 by a tool or drive mechanism.

In the above, the eccentric tensioning mechanism rotates the front eccentric wheel or the rear eccentric wheel, so that the tensioning wheel on the eccentric tensioning wheel shaft approaches to compress the synchronous belt, so that the synchronous belt keeps a proper tensioning force, the problems that the precision of conveying and positioning is affected due to the fact that the synchronous belt is too loose or the conveying mechanism is damaged due to the fact that the synchronous belt is too tight are solved, the transmission efficiency of a transmission mechanism consisting of the synchronous wheel and the synchronous belt is improved, and the service life of the transmission mechanism is prolonged; the structure is simple, when in pre-molding, the lower synchronous wheel shaft is rotationally connected with the piston rod of the injection cylinder, and the piston rod of the injection cylinder does not rotate along with the screw rod when the lower synchronous wheel shaft rotates, so that the oil leakage of the injection cylinder is not easy to occur; the injection frame and the die assembly component are connected through the injection moving component, so that the reliable movement of the die assembly component is ensured.

In this embodiment, the mold clamping assembly 200 includes a plurality of parallel support rods 40 and a fixed mold plate 41 and a movable mold plate 42 which are oppositely disposed, the fixed mold plate 41 is connected to the injection moving assembly 400 and is mounted on the support rods 40, the fixed mold plate 41 is provided with a first through hole 41a through which the feeding cylinder 21 passes, and the movable mold plate 42 is movably mounted on the support rods 40 and is connected to the hydraulic control device 300. A mold having a cavity is provided between the fixed mold plate 41 and the movable mold plate 42.

Specifically, the mold clamping assembly 200 further comprises a limiting plate 43 mounted on the support rod 40, the movable platen 42 is located between the limiting plate 43 and the fixed platen 41, the hydraulic control device 300 is mounted on the limiting plate 43, and the limiting plate 43 and the cylinder body of the hydraulic control device 300 are of an integrated structure.

Preferably, the movable die plate 42 is provided with a safety lever 44 connected with the limit plate 43. The hydraulic control device 300 includes a mold clamping driving cylinder 301 mounted on the stopper plate 43, and an output shaft of the mold clamping driving cylinder 301 is mounted with a pin pushing plate 302, and the pin pushing plate 302 is connected to the movable platen 42 through a top plate guide rod 303.

Preferably, a containing cavity is arranged in the barrel 21, the screw 24 is arranged in the containing cavity in a matching manner, a feed port 21a and an injection head 29 which passes through the first through hole 41a in a matching manner are arranged on the barrel 21, an exit port 29a is arranged on the injection head 29, and the containing cavity is respectively communicated with the feed port 21a and the exit port 29 a.

Specifically, the injection frame 20 is sleeved on the charging barrel 21, and the injection frame 20 is provided with a first through hole 20a communicated with the feeding hole 21 a. The injection-moving assembly 400 includes an injection-moving cylinder 30 and a connecting rod 31, the injection frame 20 is provided with the injection-moving cylinder 30 arranged in parallel with the material cylinder 21, and a piston rod of the injection-moving cylinder 30 is connected to the fixed platen 41 of the mold clamping assembly 200 through the connecting rod 31.

Preferably, the injection rack 20 is provided with a first slide rail 13, the mounting base 1 is provided with a fixed block 14, the fixed block 14 is provided with a first slide block 15, and the first slide block 15 is slidably disposed on the first slide rail 13.

When the injection cylinder 24 drives the screw rod 24 to translate along the axial direction, the eccentric tensioning mechanism 2 can synchronously translate with the screw rod 24, so that the screw rod 24 connected with the lower synchronous wheel shaft 4 can respectively realize the actions of rotary feeding and injection.

Specifically, the fixing blocks 14 are symmetrically arranged on two sides of the mounting base 1.

Specifically, mount pad 1 is including the relative both sides board that sets up and front end plate and the back end plate of connecting the both sides board respectively, is equipped with a plurality of mounting holes on front end plate and the back end plate respectively, goes up synchronous shaft 3, lower synchronous shaft 4 along vertical through bearing and bearing cap installation in the upper and lower both ends of front end plate and back end plate, and two front eccentric wheels 8, two back eccentric wheels 9 correspond the both sides of installing at front end plate and back end plate respectively.

Preferably, the eccentric tensioning assemblies 2 are oppositely provided with at least two groups, the tensioning wheel 11 in one group of the eccentric tensioning assemblies 2 is positioned at the inner ring of the synchronous belt 7 and compresses the inner side surface of one side of the synchronous belt 7, and the tensioning wheel 11 in the other group of the eccentric tensioning assemblies 2 is positioned outside the synchronous belt 7 and compresses the outer side surface of the other side of the synchronous belt 7.

The tension force of the two sides of the synchronous belt 7 can be conveniently adjusted, and the normal use of the synchronous belt 7 cannot be influenced even if the eccentric tensioning assembly 2 on any side of the synchronous belt 7 is damaged.

Specifically, the two groups of eccentric tensioning assemblies 2 are symmetrically arranged.

Preferably, the front eccentric wheel 8 and the rear eccentric wheel 9 are respectively and tightly fitted and installed on the installation seat 1 through a pressing ring 16. The distance between the tension wheel 11 and the synchronous belt 7 is adjusted by applying a large force to rotate the eccentric wheel, and a locking structure is not required to be arranged to lock the position of the tension wheel 11.

Preferably, the device further comprises a bridge 26, a second slide rail 27 is mounted on the bridge 26, a second slide block 28 is arranged at the bottom of the mounting base 1, and the second slide block 28 is slidably arranged on the second slide rail 27. Lateral adjustment of the position of the injection rack 20 is facilitated.

Fig. 2 is a schematic view of the screw 24 moving to the discharge end of the barrel 21 and the injection cylinder 22 being disengaged from the screw 24.

The utility model provides injection molding equipment with a pushing mechanism, which has the following working principle: the eccentric wheel is adjusted to keep the tension wheel 11 and the synchronous belt 7 at proper tension, the piston rod of the injection cylinder 22 extends out to drive the screw rod rotating assembly 22 to move towards the screw rod 24 along the first slide rail 13 on the injection frame 20 until the screw rod 24 is inserted into the lower synchronous wheel shaft 4, and the convex key is matched with the groove 24a for installation. When pre-molding, the hydraulic motor 25 drives the first synchronizing wheel 5 on the upper synchronizing wheel shaft 3 to drive the second synchronizing wheel 6 to rotate, the second synchronizing wheel 6 drives the screw rod 24 connected with the lower synchronizing wheel shaft 4 to rotate, the rotating screw rod 24 pushes the plasticized melt to the front end of the charging barrel 21, and the screw rod 24 and the lower synchronizing wheel shaft 4 retreat under the reverse action of the materials, so that the piston rod of the injection cylinder 22 moves backwards to complete injection molding metering. During injection, the piston rod of the injection cylinder 22 extends to drive the screw 24 to move towards the discharge end to complete injection operation, the melt at the discharge end of the charging barrel 21 is injected into the cavity of the mold closing assembly 200 through the injection head 29 at high speed and high pressure, and the melt in the cavity is taken out after pressure maintaining, cooling and solidification molding.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims (9)

1. An injection molding device with a pushing mechanism comprises an injection assembly (100), a mold closing assembly (200) and a hydraulic control device (300) which are sequentially arranged, wherein the injection assembly (100) comprises an injection frame (20), a material barrel (21), an injection cylinder (22) and a screw rod rotating assembly (23), the material barrel (21) is installed on the injection frame (20), the injection frame (20) is connected with one end of the mold closing assembly (200) through a jet moving assembly (400), the material barrel (21) is communicated with the mold closing assembly (200), the other end of the mold closing assembly (200) is connected with the hydraulic control device (300), a screw rod (24) is rotatably arranged in the material barrel (21), and the screw rod rotating assembly (23) is connected with the screw rod (24); the method is characterized in that: the hydraulic control device (300) comprises a die assembly driving cylinder (50), the die assembly driving cylinder (50) comprises a first plunger (503) which does telescopic reciprocating displacement motion, a first plunger cavity (531), a first flow channel (512) and a second flow channel (513) are arranged at two ends of the first plunger cavity (531) respectively, a second plunger (511) is arranged in the first plunger cavity (531), a first piston (510) is arranged on the second plunger (511), and the first piston (510) is arranged between the first flow channel (512) and the second flow channel (513).

2. An injection molding apparatus with a pusher jack according to claim 1, wherein: screw rod rotating assembly (23) includes mount pad (1), mount pad (1) slidable mounting is on injection frame (20), install hydraulic motor (25) pivot on mount pad (1) and be connected with the screw rod through taking drive mechanism, install injection jar (22) on injection frame (20), the piston rod and the mount pad of injection jar (22) are connected.

3. An injection molding apparatus with a pusher jack according to claim 1, wherein a push chamber (514) is formed between the rear side of the first piston (510) and the inner end surface of the first plunger chamber (531), and the push chamber (514) communicates with the second flow passage (513), and the diameter of the push chamber (514) is larger than the diameter of the first plunger chamber (531); a first sealing ring is arranged between the outer wall of the outer side end of the second plunger (511) and the inner wall of the outer side end opening of the first plunger cavity (531); a leakage channel (515) is arranged at the outer side port of the first plunger cavity (531).

4. An injection molding apparatus with a pusher jack according to claim 1, wherein: the die assembly component (200) comprises a plurality of supporting rods (40), and a fixed die plate (41) and a movable die plate (42) which are arranged oppositely, wherein the fixed die plate (41) is connected with the injection moving component (400) and is arranged on the supporting rods (40), a first through hole (41a) through which the feeding cylinder (21) passes is formed in the fixed die plate (41), and the movable die plate (42) is movably arranged on the supporting rods (40) and is connected with the hydraulic control device (300).

5. An injection molding apparatus with a pusher jack according to claim 4, wherein: the die assembly component (200) further comprises a limiting plate (43) arranged on the supporting rod (40), the movable die plate (42) is located between the limiting plate (43) and the fixed die plate (41), and a hydraulic control device (300) is arranged on the limiting plate (43).

6. An injection molding apparatus with a pusher jack according to claim 5, wherein: and a safety rod (44) connected with the limiting plate (43) is arranged on the movable template (42).

7. An injection molding apparatus with a pusher jack according to claim 2, wherein: install first slide rail (13) on injection frame (20), be equipped with fixed block (14) on mount pad (1), install first slider (15) on fixed block (14), first slider (15) slide to set up on first slide rail (13).

8. An injection molding apparatus with a pusher jack according to claim 7, wherein: the mounting base is characterized by further comprising a bridge (26), a second sliding rail (27) is mounted on the bridge (26), a second sliding block (28) is arranged at the bottom of the mounting base (1), and the second sliding block (28) is arranged on the second sliding rail (27) in a sliding mode.

9. An injection molding apparatus with a pusher jack according to claim 1, wherein: be equipped with the holding chamber in feed cylinder (21), the holding intracavity is located in screw rod (24) cooperation, be equipped with feed inlet (21a) and injection head (29) on feed cylinder (21), be equipped with exit port (29a) on injection head (29), the holding chamber communicates feed inlet (21a) and exit port (29a) respectively.

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