CN113524578A

CN113524578A - Glue injection device and method applied to injection molding machine

Info

Publication number: CN113524578A
Application number: CN202110978668.3A
Authority: CN
Inventors: 华叙亮
Original assignee: Suzhou Yungang Intelligent Technology Co ltd
Current assignee: Suzhou Yungang Intelligent Technology Co ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2021-10-22

Abstract

The invention discloses a glue injection device applied to an injection molding machine, which relates to the technical field of mold processing equipment and comprises the following components: gun barrel, melten gel screw rod, melten gel motor, mounting bracket, propelling movement frame, kinetic energy saving disc, location portion, penetrate gluey motor. The pushing frame and the kinetic energy storage disc are additionally arranged on a conventional glue injection mechanism formed by transmission of the glue injection motor and the glue injection screw rod, wherein in the driving process of the pushing frame driven by the glue injection motor, the limiting arm of the pushing frame is tightly attached to the kinetic energy storage disc and pushes the kinetic energy storage disc to rotate along the non-concentric positioning portion for storing energy, the kinetic energy storage disc releases the force of energy storage accumulation when glue injection is performed, the kinetic energy storage disc is independent from the pushing frame and cannot increase the weight of the pushing frame, and compared with the kinetic energy storage disc which directly adopts a spring structure, the kinetic energy storage disc is not easy to shift when releasing kinetic energy, so that the glue injection mechanism is more stable and difficult to generate extra kinetic energy loss, and the glue injection thrust can be remarkably increased and the lifting speed gradient can be improved.

Description

Glue injection device and method applied to injection molding machine

Technical Field

The invention relates to the technical field of mold processing equipment, in particular to a glue injection device applied to an injection molding machine.

Background

The traditional technology of the injection molding machine is that a hydraulic system consisting of a motor, a hydraulic pump, a hydraulic cylinder, a valve, a pressure sensor and a pipeline is adopted, the flow rate of the hydraulic cylinder is controlled by controlling the flow rate of the hydraulic cylinder, and the control of the injection thrust and the pressure maintaining pressure is realized by controlling the pressure of hydraulic oil in the pipeline.

Along with the requirement of injection molding precision, especially high-precision thin-wall injection molding workpieces such as light guide plates, medical plastic products, precise plastic parts and the like, people put forward higher and higher requirements on injection molding actions of injection molding machines: such as fast rise of the injection speed, large injection force, short injection process, accurate pressure maintaining pressure after the injection is finished, etc. Because the parts are very small, if the injection speed rises for too long, the injection amount is very large, and even when the injection speed of the injection system does not rise to the designed injection speed, the mold is filled. This results in an insufficient injection speed that can be achieved in practice, and low injection speeds can lead to product defects such as channel condensation and underfill.

The traditional hydraulic system adopts a valve to control the change of flow and pressure, and the shooting glue rise time is longer. The servo motor is adopted to drive the hydraulic pump, so that the speed rise time is obviously shortened; the pure electric injection molding machine adopts a servo motor to directly drive the injection through the transmission of the screw rod, thereby further shortening the rising time of the injection speed.

In order to obtain higher injection acceleration, there are two main schemes adopted: firstly, the mode of gas jar energy storage, secondly the mode of increaseing servo motor power. The former adopts an independent oil pump to store energy independently in an injection molding period, and simultaneously supplies oil to an injection oil cylinder together with a main pump at the injection moment, so that the injection speed and the rising slope (acceleration) thereof are improved; the latter overcomes the shooting resistance by increasing the power of the servo motor, thereby achieving faster shooting speed and acceleration. When the gas tank energy storage mode is adopted, the product yield is reduced due to the uncontrollable energy storage and release process; and the power of the servo motor is increased, so that on one hand, the cost is greatly increased, on the other hand, the inertia of the large motor is also larger, and the marginal effect of acceleration lifting by a method of lifting the power of the motor is reduced along with the increase of the power of the motor.

Disclosure of Invention

One of the purposes of the present invention is to provide a glue injection device which is obviously applied to an injection molding machine on the basis of not increasing the power of a servo motor, aiming at the problem that the marginal effect of acceleration increase by increasing the power of the motor in the prior art is reduced along with the increase of the power of the motor.

The invention also aims to provide a glue injection method applied to the injection molding machine.

In order to achieve one of the purposes, the invention adopts the following technical scheme: a is applied to penetrating mucilage binding and is put of injection molding machine, wherein, includes: gun barrel, melten gel screw rod, melten gel motor, mounting bracket, propelling movement frame, kinetic energy saving disc, location portion, penetrate gluey motor.

The glue melting screw rod is arranged in the gun barrel, and the glue melting screw rod is coaxial with the gun barrel. The glue melting motor is in power connection with the glue melting screw rod.

The mounting bracket is fixedly arranged at the tail part of the gun barrel, and a guide rail is arranged on the mounting bracket. The pushing frame is installed on the mounting frame, the pushing frame is provided with limiting arms, the limiting arms are connected with the guide rails in a sliding mode, the limiting arms are distributed on two sides of the pushing frame, and gaps are formed between the limiting arms.

The kinetic energy storage disc is arranged in a gap between the limiting arms, a rubber ring is arranged on the outer diameter of the kinetic energy storage disc, and two side edges of the kinetic energy storage disc are tightly attached to the limiting arms. The positioning part is arranged on the kinetic energy saving disc in a penetrating mode, the positioning part is movably connected with the kinetic energy saving disc in a non-coaxial mode, and the positioning part is located on the side portion of the kinetic energy saving disc. The kinetic energy storage disc is internally provided with a coil spring which is connected with the positioning part.

The glue injection motor is installed at the tail of the mounting frame, and a glue injection screw rod is arranged on the glue injection motor. The pushing frame is further provided with a telescopic cavity, and the telescopic cavity is in threaded connection with the glue injection screw rod.

In the technical scheme, when the embodiment of the invention works, plastic particles are introduced into the gun barrel, and meanwhile, the glue melting motor is started to drive the glue melting screw to rotate, so that the plastic particles are pushed to the front end of the gun barrel to move forward, and the plastic particles are gradually melted and pushed to the shooting opening position at the front end of the gun barrel. Along with the proceeding of the molten rubber, the rubber injection control system controls the rubber injection motor to drive the rubber injection screw rod to rotate reversely by starting the rubber injection motor according to the backpressure measured by the sensor and the backpressure value set by the upper computer, so that the pushing frame is driven to retreat, and the pushing frame pulls the molten rubber screw rod to retreat so as to control the backpressure value on the molten rubber screw rod.

When the size of the backpressure is controlled, the limiting arm on the pushing frame pushes the kinetic energy storage disc to rotate backwards by taking the positioning part as a center, and when the kinetic energy storage disc rotates backwards, the coil spring in the kinetic energy storage disc is stressed and compressed to store energy.

After the glue melting is finished, the glue injection motor is started to rotate forwards, the glue injection screw rod is enabled to rotate forwards to drive the pushing frame to apply pressure forwards along the mounting frame, and meanwhile, the coil spring on the kinetic energy storage disc releases elastic kinetic energy and pushes the glue injection motor to perform force simultaneously to perform glue injection action. And after the glue injection is finished, the glue injection control system is switched to pressure maintaining control, the thrust of the kinetic energy storage disc subtracts or adds the thrust output by the glue injection motor to obtain the pressure maintaining force, and after the pressure maintaining is finished, the mold opening, the part taking and the mold closing are carried out on the mold of the injection molding machine, and then the next glue melting, back pressure, energy storage, glue injection and pressure maintaining work cycle is carried out.

Further, in an embodiment of the present invention, the glue injection device applied to the injection molding machine further includes: the hopper is located at the upper end of the gun barrel, and the stub bar is communicated with the gun barrel.

Further, in an embodiment of the present invention, the glue injection device applied to the injection molding machine further includes: and the mould is arranged at the front end of the gun barrel.

Further, in the embodiment of the present invention, the glue melting motor is connected to the glue melting screw through a transmission mechanism.

Further, in the embodiment of the present invention, at least two kinetic energy storage discs are distributed up and down, and between the two kinetic energy storage discs, there are: and the stabilizing disc is fixedly connected with the positioning part through a bolt.

Furthermore, in the embodiment of the present invention, the limiting arm has a through hole, and the mounting frame has a supporting beam, the supporting beam passes through the through hole, and the supporting beam is fixedly connected to the stabilizing plate.

Further, in an embodiment of the present invention, the positioning portion has: pivot, movable post, fore-set.

The rotating shaft is connected with the coil spring and is rotationally connected with the stabilizing disc, the rotating shaft is of a hollow structure, and the inner wall of the rotating shaft is provided with a butt joint.

The activity post passes the pivot with firm dish, the activity post with the coaxial rotation of pivot is connected, firm dish passes through bolted connection the activity post, the activity post is hollow structure, the ladder mouth has and the ladder piece on the activity post. The step mouth has the interior outer wall that link up the activity post, the step mouth with the interface corresponds. The ladder block is arranged in the ladder opening and matched with the ladder opening.

The top column is clamped into the movable column along the stepped port, the top column is outwards ejected out of the stepped port, and therefore the stepped block is partially clamped into the butt joint port of the rotating shaft.

According to the demand of penetrating gluey pressure, the fore-set of pulling or promotion location portion slides along the activity post inside in the location portion, make the fore-set no longer support the ladder piece in the activity post in the location portion, perhaps make the fore-set partly top the ladder piece in the activity post to the butt joint mouth of pivot in the location portion, thereby make activity post and pivot break away from power connection or carry out power connection, later loosen the activity post through the bolt of unscrewing on the firm dish, and then rotate through the pivot of unscrewing fore-set control part or whole, with the compression elasticity of strengthening or weakening the wind spring, it can to fix the activity post again at the firm dish to tighten the bolt on the firm dish at last.

Further, in the embodiment of the present invention, the lower end of the top pillar has an inclined guide surface.

Furthermore, in the embodiment of the invention, a reset elastic piece is arranged between the step block and the step opening.

Furthermore, in the embodiment of the present invention, the top pillar and the movable pillar are connected in a concave-convex fit manner.

Further, in the embodiment of the present invention, a driven disc is disposed on an outer diameter of the movable column, the driven disc is in a disc shape, the driven disc has an outer edge portion and an inner edge portion, a radius of the outer edge portion is greater than a radius of the inner edge portion, and a hook portion is formed at a connection portion between the outer edge portion and the inner edge portion.

The stabilizing disc is provided with an inner concave surface, a limiting assembly is arranged on the inner concave surface, and the limiting assembly is provided with: folded plate, movable block, resistance spring. Two the folded plate is the symmetry setting, the folded plate is "L" shape, folded plate movable mounting be in on the interior concave surface, movable block swing joint be in the bottom of folded plate, resistance spring coupling is in between the movable block.

In the process of injecting the glue, the coil spring on the kinetic energy storage disc releases elastic kinetic energy in a rotating mode, so that the positioning part is required to be incapable of moving, however, the movable column needs to be loosened through the bolt in the pressure regulating process, the movable column needs to be fastened again through the bolt after the pressure regulating is completed, and in the process, due to the fact that manual operation and frequent bolt loosening are needed, the movable column is possible to loosen, and the stability of the positioning part is affected.

Therefore, through the structure, if the movable column loosens in the process of injecting the glue, the movable column can drive the driven disc to rotate 90 degrees under the action of the coil spring and then respectively press and hook the folded plate of the limiting component downwards, so that the pressed folded plate is upwards abutted against the driven disc through the resistance spring and the hooked folded plate is also driven to tightly abut against the driven disc, and the movable column is stabilized again. By the structure, the complete loss of the power of the kinetic energy storage disc can be avoided, and the situation that the pressure regulating function cannot be realized can also be avoided.

The invention has the beneficial effects that:

the invention adds the pushing frame and the kinetic energy storage disc on the conventional glue shooting mechanism formed by the transmission of the glue shooting motor and the glue shooting screw rod, wherein in the driving process of the pushing frame by the glue shooting motor, the limiting arm of the pushing frame clings to the kinetic energy storage disc and pushes the kinetic energy storage disc to rotate along the non-concentric positioning part for energy storage, when in glue shooting, the kinetic energy storage disc releases the power of energy storage accumulation, the kinetic energy storage disc exists independently relative to the pushing frame, the weight of the pushing frame cannot be increased, the improvement of the glue shooting thrust and the lifting speed gradient is facilitated, and compared with the direct adoption of a spring structure, the kinetic energy storage disc is not easy to deviate when releasing the kinetic energy, so that the glue shooting mechanism is more stable, the additional kinetic energy loss is not easy to generate, and the glue shooting thrust and the lifting speed gradient are obviously increased.

In order to achieve the second purpose, the invention adopts the following technical scheme: a glue injection method applied to an injection molding machine comprises the following steps:

melting glue, namely introducing plastic particles into the gun barrel, starting a glue melting motor to drive a glue melting screw to rotate, and pushing the plastic particles to advance towards the front end of the gun barrel so that the plastic particles are gradually melted and pushed to the injection port position at the front end of the gun barrel;

back pressure, wherein as the glue melting is carried out, a glue injection motor on a mounting frame connected with the gun barrel is started to rotate reversely, so that a glue injection screw rod connected with the glue injection motor is driven to rotate reversely, a pushing frame connected with the mounting frame in a sliding mode is driven to retreat, and the pushing frame pulls a glue melting screw rod to retreat so as to control the back pressure on the glue melting screw rod;

energy storage, wherein when the back pressure is controlled, the limiting arm on the pushing frame pushes the kinetic energy storage disc to rotate backwards by taking the positioning part as a center, and when the kinetic energy storage disc rotates backwards, a coil spring in the kinetic energy storage disc is stressed and compressed to store energy;

and (3) injecting glue, wherein after glue melting is finished, the glue injection motor is started to rotate forwards, the glue injection screw rod is enabled to rotate forwards to drive the pushing frame to apply pressure forwards along the mounting frame, and meanwhile, the coil spring on the kinetic energy storage disc releases elastic kinetic energy and pushes the glue injection motor to perform force injection action simultaneously.

Further, in the embodiment of the invention, after the glue injection step is completed, the glue injection control system is switched to pressure maintaining control, the pressure maintaining force is obtained by subtracting the thrust force of the kinetic energy storage disc from or adding the thrust force output by the glue injection motor, after the pressure maintaining is finished, the mold opening, the part taking and the mold closing are carried out on the mold of the injection molding machine, and then the next glue melting-back pressure-energy storage-glue injection-pressure maintaining work cycle is entered.

Further, in the back pressure step, the glue injection control system controls the glue injection motor to control the actual back pressure through the reverse rotation of the glue injection screw rod according to the back pressure measured by the sensor and the back pressure value set by the upper computer.

Further, in the embodiment of the present invention, the glue injection method applied to the injection molding machine further includes the following steps:

the pressure regulating, according to the demand of penetrating gluey pressure, the fore-set of pulling or promotion location portion slides along the activity post inside in the location portion, make the fore-set no longer support the ladder piece in the activity post in the location portion, perhaps make the fore-set partially top the ladder piece in the activity post to the butt joint mouth of pivot in the location portion, thereby make activity post and pivot break away from power connection or carry out power connection, later loosen the activity post through the bolt that unscrews on the firm dish, and then rotate through the pivot of unscrewing fore-set control part or whole, with the compression elasticity power of strengthening or weakening the coil spring, it can to fix the activity post again at the firm dish with the bolt on the firm dish at last retightening.

Drawings

Fig. 1 is a schematic plan view of a glue injection device applied to an injection molding machine according to an embodiment of the present invention.

Fig. 2 is a schematic top view of the kinetic energy storage disc and the positioning portion according to the embodiment of the invention.

Fig. 3 is a schematic diagram illustrating the back pressure control effect of the injection device applied to the injection molding machine according to the embodiment of the present invention.

Fig. 4 is a schematic diagram illustrating the glue injection control effect of the glue injection device applied to the injection molding machine according to the embodiment of the invention.

Fig. 5 is a schematic perspective view of a limiting arm according to an embodiment of the present invention.

Fig. 6 is a schematic side view of the kinetic energy storage disc and the positioning portion according to the embodiment of the invention.

Fig. 7 is a schematic top view of a positioning portion according to an embodiment of the invention.

Fig. 8 is a schematic view illustrating an internal movement effect of the positioning portion according to the embodiment of the present invention.

Fig. 9 is a schematic top view of a passive plate and a position limiting assembly according to an embodiment of the invention.

Fig. 10 is a schematic diagram illustrating the movement effect of the passive plate and the limiting assembly according to the embodiment of the present invention.

FIG. 11 is a schematic diagram of another movement effect of the passive plate and the position limiting assembly according to the embodiment of the present invention

In the attached drawings

1. Gun barrel 2, glue melting screw 3 and glue melting motor

4. Hopper 5 and die

10. Mounting frame 11, guide rail 12 and support beam

20. Push frame 21, spacing arm 211, through-hole

22. Telescopic cavity

30. Penetrate gluey motor 31, penetrate gluey lead screw

40. Kinetic energy storage disc 41, coil spring

50. Positioning part 51, rotating shaft 511 and butt joint port

52. Movable column 521, step opening 522 and step block

53. Driven disk 531, hook part

60. Stabilizing disc 70, top pillar

80. Limiting assembly 81, folded plate 82 and movable block

83. Resistance spring

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clear and fully described, embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some embodiments of the invention and are not limiting of the invention, and that all other embodiments obtained by those of ordinary skill in the art without the exercise of inventive faculty are within the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. But it is obvious. To one of ordinary skill in the art, the embodiments may be practiced without limitation to these specific details. In some instances, well-known injection molding methods and structures used in injection molding machines have not been described in detail in order to avoid unnecessarily obscuring these embodiments. In addition, all embodiments may be used in combination with each other.

The first embodiment is as follows:

a glue injection apparatus for an injection molding machine, as shown in fig. 1, comprising: the gun barrel 1, the glue melting screw rod 2, the glue melting motor 3, the mounting frame 10, the pushing frame 20, the kinetic energy storage disc 40, the positioning part 50 and the glue injection motor 30.

The glue melting screw rod 2 is arranged in the gun barrel 1, and the glue melting screw rod 2 is coaxial with the gun barrel 1. The glue melting motor 3 is in power connection with the glue melting screw rod 2.

The mounting frame 10 is fixedly arranged at the tail part of the gun barrel 1, and the mounting frame 10 is provided with a guide rail 11. The pushing frame 20 is installed on the installation frame 10, the pushing frame 20 is provided with limiting arms 21, the limiting arms 21 are connected with the guide rail 11 in a sliding mode, the limiting arms 21 are distributed on two sides of the pushing frame 20, and gaps are formed among the limiting arms 21.

As shown in fig. 1 and 2, the kinetic energy storage disk 40 is disposed in the gap between the limit arms 21, a rubber ring is disposed on the outer diameter of the kinetic energy storage disk 40, and both side edges of the kinetic energy storage disk 40 are closely attached to the limit arms 21. The positioning part 50 is arranged on the kinetic energy storage disc 40 in a penetrating way, the positioning part 50 is movably connected with the kinetic energy storage disc 40 in a non-coaxial way, and the positioning part 50 is positioned at the edge part of the kinetic energy storage disc 40. The kinetic energy storing disk 40 has a coil spring 41 therein, and the coil spring 41 is connected to the positioning portion 50.

The glue injection motor 30 is arranged at the tail part of the mounting frame 10, and a glue injection screw rod 31 is arranged on the glue injection motor 30. The pushing frame 20 further has a telescopic cavity 22, and the telescopic cavity 22 is in threaded connection with the glue injection screw rod 31.

The implementation steps are as follows: as shown in fig. 3 and 4, in operation, plastic particles are introduced into the barrel 1, and the glue melting motor 3 is started to drive the glue melting screw 2 to rotate, so that the plastic particles are pushed forward to the front end of the barrel 1, and are gradually melted and pushed to the shooting opening position at the front end of the barrel 1. Along with the proceeding of the molten rubber, the rubber injection control system controls the rubber injection motor 30 to drive the rubber injection screw rod 31 to rotate reversely by starting the rubber injection motor 30 according to the backpressure measured by the sensor and the backpressure value set by the upper computer, so that the pushing frame 20 is driven to move backwards, and the pushing frame 20 is driven to pull the molten rubber screw rod 2 to move backwards so as to control the backpressure value on the molten rubber screw rod 2.

The limiting arm 21 on the pushing frame 20 pushes the kinetic energy storage disc 40 to rotate backwards around the positioning part 50 while controlling the magnitude of the back pressure, and the coil spring 41 in the kinetic energy storage disc 40 is stressed and compressed to store energy while the kinetic energy storage disc 40 rotates backwards.

After the glue melting is finished, the glue injection motor 30 is started to rotate positively, the glue injection screw rod 31 is driven to rotate positively to drive the pushing frame 20 to apply pressure forwards along the mounting frame 10, and meanwhile, the coil spring 41 on the kinetic energy storage disc 40 releases elastic kinetic energy and pushes the glue injection motor 30 to perform force simultaneously to perform glue injection action. And after the glue injection is finished, the glue injection control system is switched to pressure maintaining control, the thrust of the kinetic energy storage disc 40 subtracts or adds the thrust output by the glue injection motor 30 to obtain a pressure maintaining force, and after the pressure maintaining is finished, the mold 5 of the injection molding machine is subjected to mold opening, member taking and mold closing actions, and then the next glue melting, back pressure, energy storage, glue injection and pressure maintaining work cycle is carried out.

According to the invention, the pushing frame 20 and the kinetic energy storage disc 40 are added on the conventional glue shooting mechanism formed by transmission of the glue shooting motor 30 and the glue shooting screw rod 31, wherein in the driving process of the pushing frame 20 by the glue shooting motor 30, the limiting arm 21 of the pushing frame 20 clings to the kinetic energy storage disc 40 and pushes the kinetic energy storage disc 40 to rotate along the non-concentric positioning part 50 for energy storage, when the glue is shot, the kinetic energy storage disc 40 releases the power of energy storage accumulation, the kinetic energy storage disc 40 exists independently relative to the pushing frame 20, the weight of the pushing frame 20 cannot be increased, the glue shooting thrust and the rising speed gradient are favorably improved, and compared with the direct adoption of a spring structure, the kinetic energy storage disc 40 is not easy to shift when releasing the kinetic energy, so that the glue shooting thrust is more stable, the extra kinetic energy loss is not easy to generate, and the glue shooting thrust and the rising speed gradient are remarkably increased.

If the maximum pushing force provided by the glue injection motor 30 and the glue injection screw rod 31 is Fm, and the pushing force required for back pressure control is Fb (generally Fm > Fb), the maximum allowable compression force of the kinetic energy storage disk 40 is Fm-Fb. In the full control mode, when the injection is performed, the sum of the thrust of the injection motor 30 and the kinetic energy storage disk 40 is 2Fm-Fb, thereby realizing a greater injection thrust than the conventional structure. If the glue injection resistance is Fz and the mass of the glue injection motion mechanism is M (the inertia of the rotating mechanism is converted into the mass of the translation mechanism), the maximum glue injection acceleration is (2 Fm-Fb-Fz)/M. Because the inertia of the moving part of the structure is almost the same as that of the traditional structure, the maximum acceleration of the injected glue is obviously improved. In addition, the energy storage strength of this structure can be adjusted (the positioning portion 50 described below), and therefore, the acceleration is further significantly improved.

Preferably, as shown in fig. 1, the glue injection device applied to the injection molding machine further comprises a hopper 4, wherein the hopper 4 is positioned at the upper end of the gun barrel 1, and the stub bar is communicated with the gun barrel 1.

Preferably, as shown in fig. 1, the glue injection apparatus applied to the injection molding machine further includes a mold 5, and the mold 5 is disposed at the front end of the barrel 1.

Preferably, the glue melting motor 3 is connected with the glue melting screw rod 2 through a transmission mechanism.

Preferably, as shown in fig. 6, the kinetic energy storage discs 40 are distributed at least two in the up-down direction, and a stabilization disc 60 is provided between the kinetic energy storage discs 40, and the stabilization disc 60 is fixedly connected to the positioning part 50 by bolts.

More preferably, as shown in fig. 1 and 5, the limiting arm 21 has a through hole 211, the mounting frame 10 has a supporting beam 12, the supporting beam 12 passes through the through hole 211, and the supporting beam 12 is fixedly connected to the stabilizing plate 60.

More preferably, as shown in fig. 6 and 7, the positioning portion 50 includes: a rotating shaft 51, a movable column 52 and a top column 70.

The rotating shaft 51 is connected with the coil spring 41, the rotating shaft 51 is rotatably connected with the fixing disc 60, the rotating shaft 51 is of a hollow structure, and the inner wall of the rotating shaft 51 is provided with a butt joint opening 511.

The movable column 52 penetrates through the rotating shaft 51 and the fixing disc 60, the movable column 52 is coaxially and rotatably connected with the rotating shaft 51, the fixing disc 60 is connected with the movable column 52 through bolts, the movable column 52 is of a hollow structure, and the movable column 52 is provided with a step opening 521 and a step block 522. The stepped portion 521 has inner and outer walls penetrating the movable post 52, and the stepped portion 521 corresponds to the mating opening 511. Step block 522 is disposed in step opening 521 and cooperates with step opening 521.

The top pillar 70 is snapped into the movable pillar 52 along the stepped opening 521, and the top pillar 70 outwardly ejects the steps in the stepped opening 521, so that a portion of the stepped block 522 is snapped into the mating opening 511 of the rotating shaft 51.

According to the requirement of the injection pressure, as shown in fig. 8, the top column 70 of the positioning portion 50 is pulled or pushed to slide along the inside of the movable column 52 in the positioning portion 50, so that the top column 70 is no longer abutted against the step block 522 in the movable column 52 in the positioning portion 50, or the top column 70 partially butts the step block 522 in the movable column 52 against the abutting port 511 of the rotating shaft 51 in the positioning portion 50, so that the movable column 52 is separated from the rotating shaft 51 or is in power connection, then the movable column 52 is loosened by loosening the bolts on the fixing disc 60, and then a part or all of the rotating shaft 51 is rotated by loosening the bolts on the top column 70 to strengthen or weaken the compression elastic force of the coil spring 41, and finally the bolts on the fixing disc 60 are tightened again to fix the movable column 52 on the fixing disc 60 again.

More preferably, the lower end of the top post 70 has an inclined guide surface.

More preferably, a reset elastic piece is arranged between the stepped block 522 and the stepped opening 521.

More preferably, the top post 70 and the movable post 52 are in a male-female fit connection.

Preferably, as shown in fig. 9, the outer diameter of the movable column 52 is provided with a driven disc 53, the driven disc 53 has a disc shape, the driven disc 53 has an outer edge and an inner edge, the outer edge has a larger radius than the inner edge, and a hook 531 is formed at the connection between the outer edge and the inner edge.

The stabilizing disc 60 has an inner concave surface, on which is disposed a limiting assembly 80, the limiting assembly 80 having: a flap 81, a movable block 82, a resistance spring 83. The two folded plates 81 are symmetrically arranged, the folded plates 81 are L-shaped, the folded plates 81 are movably arranged on the inner concave surface, the movable blocks 82 are movably connected to the bottoms of the folded plates 81, and the resistance springs 83 are connected between the movable blocks 82 (the resistance springs 83 are in an untightened state).

In the process of injecting the glue, the coil spring 41 on the kinetic energy storage disc 40 releases the elastic kinetic energy in a rotating manner, so that the positioning part 50 is required to be incapable of moving, however, the structure of the invention needs to loosen the movable column 52 through the bolt during pressure adjustment, and needs to fasten the movable column 52 through the bolt again after the pressure adjustment is completed, in this process, because manual operation and frequent bolt loosening are needed, the movable column 52 is possibly loosened, and the stability of the positioning part 50 is influenced.

Therefore, as shown in fig. 9 and 10, with the above structure, if the movable column 52 loosens during the glue injection, the movable column 52 can drive the driven plate 53 to rotate 90 degrees under the action of the coil spring 41, and then respectively press and hook the flap 81 of the limiting assembly 80 downwards, so as to force the pressed flap 81 to abut against the driven plate 53 upwards through the resistance spring 83, and further drive the hooked flap 81 to abut against the driven plate 53 tightly, thereby re-stabilizing the movable column 52. By this structure, the complete loss of the power of the kinetic energy storing disk 40 can be avoided, and the failure of the pressure regulating function can be avoided.

A glue injection method applied to an injection molding machine comprises the following steps:

melting glue, namely introducing plastic particles into the gun barrel 1, starting a glue melting motor 3 to drive a glue melting screw rod 2 to rotate, and pushing the plastic particles to the front end of the gun barrel 1 to advance so that the plastic particles are gradually melted and pushed to the injection position at the front end of the gun barrel 1;

back pressure, starting a glue injection motor 30 on a mounting rack 10 connected with the gun barrel 1 to rotate reversely along with the progress of glue melting, and promoting a glue injection screw rod 31 connected with the glue injection motor 30 to rotate reversely, so as to drive a pushing rack 20 connected with the mounting rack 10 in a sliding manner to move backwards, and further enabling the pushing rack 20 to pull a glue melting screw rod 2 to move backwards so as to control the size of the back pressure on the glue melting screw rod 2;

energy storage, wherein when the back pressure is controlled, the limiting arm 21 on the pushing frame 20 pushes the kinetic energy storage disc 40 to rotate backwards by taking the positioning part 50 as a center, and when the kinetic energy storage disc 40 rotates backwards, the coil spring 41 in the kinetic energy storage disc 40 is stressed and compressed to store energy;

and (3) injecting glue, after glue melting is finished, starting the glue injection motor 30 to rotate forwards, so that the glue injection screw rod 31 rotates forwards to drive the pushing frame 20 to apply pressure forwards along the mounting frame 10, and meanwhile, the coil spring 41 on the kinetic energy storage disc 40 releases elastic kinetic energy to push the glue injection motor 30 to perform force injection action simultaneously.

Preferably, after the step of injecting the glue is completed, the glue injection control system switches to pressure maintaining control, the thrust of the kinetic energy storage disc 40 minus or plus the thrust output by the glue injection motor 30 is the pressure maintaining pressure, after the pressure maintaining is completed, the mold 5 of the injection molding machine is opened, taken and closed, and then the next glue melting-back pressure-energy storage-glue injection-pressure maintaining work cycle is started.

Preferably, in the back pressure step, the glue injection control system controls the glue injection motor 30 to control the actual back pressure through the reverse rotation of the glue injection screw rod 31 according to the back pressure measured by the sensor and the back pressure value set by the upper computer.

Preferably, the glue injection method applied to the injection molding machine further comprises the following steps:

and pressure regulation, namely pulling or pushing the top column 70 of the positioning part 50 to slide along the inside of the movable column 52 in the positioning part 50 according to the requirement of glue injection pressure, so that the top column 70 does not abut against the step block 522 in the movable column 52 in the positioning part 50, or the top column 70 partially abuts against the step block 522 in the movable column 52 to the butt joint opening 511 of the rotating shaft 51 in the positioning part 50, so that the movable column 52 is separated from the rotating shaft 51 or is in power connection with the rotating shaft 51, then loosening the movable column 52 by loosening the bolt on the stabilizing disc 60, further controlling part or all of the rotating shaft 51 to rotate by screwing the top column 70 to strengthen or weaken the compression elastic force of the coil spring 41, and finally re-screwing the bolt on the stabilizing disc 60 to fix the movable column 52 on the stabilizing disc 60 again.

Although the illustrative embodiments of the present invention have been described above to enable those skilled in the art to understand the present invention, the present invention is not limited to the scope of the embodiments, and it is apparent to those skilled in the art that all the inventive concepts using the present invention are protected as long as they can be changed within the spirit and scope of the present invention as defined and defined by the appended claims.

Claims

1. A is applied to penetrating mucilage binding and is put of injection molding machine, wherein, includes:

a barrel;

the glue melting screw is arranged in the gun barrel and is coaxial with the gun barrel;

the glue melting motor is in power connection with the glue melting screw rod;

the mounting bracket, the mounting bracket fixed mounting be in the barrel afterbody, have on the mounting bracket:

a guide rail;

a push frame mounted on the mounting frame, the push frame having:

the limiting arms are connected with the guide rail in a sliding mode and distributed on two sides of the pushing frame, and gaps are formed among the limiting arms;

the kinetic energy storage disc is arranged in a gap between the limiting arms;

the positioning part is arranged on the kinetic energy saving disc in a penetrating mode, the positioning part is movably connected with the kinetic energy saving disc in a non-coaxial mode, and the positioning part is located on the side portion of the kinetic energy saving disc;

the kinetic energy storage disc is internally provided with:

the coil spring is connected with the positioning part;

penetrate gluey motor, it installs to penetrate gluey motor the afterbody of mounting bracket, it has on the motor to penetrate gluey:

injecting a glue screw rod;

the pushing frame is further provided with a telescopic cavity, and the telescopic cavity is in threaded connection with the glue injection screw rod.

2. The glue injection apparatus for an injection molding machine according to claim 1, wherein the glue injection apparatus for an injection molding machine further comprises:

the hopper is located at the upper end of the gun barrel, and the stub bar is communicated with the gun barrel.

3. The glue injection apparatus for an injection molding machine according to claim 1, wherein the glue injection apparatus for an injection molding machine further comprises:

and the mould is arranged at the front end of the gun barrel.

4. The glue injection device applied to the injection molding machine according to claim 1, wherein the glue melting motor is connected with the glue melting screw through a transmission mechanism.

5. The glue injection device applied to the injection molding machine according to claim 1, wherein the kinetic energy storage discs are distributed at least two up and down, and the kinetic energy storage discs have at least two of the following parts between them:

and the stabilizing disc is fixedly connected with the positioning part through a bolt.

6. The glue injection device applied to the injection molding machine according to claim 5, wherein the limiting arm is provided with a through hole, the mounting frame is provided with a supporting beam, the supporting beam passes through the through hole, and the supporting beam is fixedly connected with the stabilizing disc.

7. The glue injection device applied to the injection molding machine according to claim 5, wherein the positioning portion has:

the rotating shaft is connected with the coil spring and is rotationally connected with the stabilizing disc, the rotating shaft is of a hollow structure, and the inner wall of the rotating shaft is provided with a butt joint port;

the movable column penetrates through the rotating shaft and the stabilizing disc, the movable column is coaxially and rotatably connected with the rotating shaft, the stabilizing disc is connected with the movable column through the bolt, the movable column is of a hollow structure, and the movable column is provided with:

the stepped port is provided with an inner wall and an outer wall which penetrate through the movable column, and the stepped port corresponds to the butt joint port;

the step block is arranged in the step opening and is matched with the step opening;

the top column is clamped into the movable column along the stepped port, the top column is outwards ejected out of the stepped port, so that the stepped block is clamped into the butt joint port of the rotating shaft.

8. The glue injection apparatus for an injection molding machine as claimed in claim 7, wherein the lower end of the top pillar has an inclined guide surface.

9. The glue injection device applied to the injection molding machine according to claim 7, wherein a reset elastic piece is arranged between the stepped block and the stepped port.

10. The glue injection device applied to the injection molding machine according to claim 7, wherein the top pillar and the movable pillar are connected in a concave-convex fit manner.