CN212124076U

CN212124076U - Two-stage type injection machine

Info

Publication number: CN212124076U
Application number: CN202020192112.2U
Authority: CN
Inventors: 王俊贤; 林硕函; 吴宗附
Original assignee: Fu Chun Shin Precision Industry Co ltd
Current assignee: Fu Chun Shin Precision Industry Co ltd
Priority date: 2020-02-21
Filing date: 2020-02-21
Publication date: 2020-12-11
Anticipated expiration: 2030-02-21

Abstract

A two-stage injection machine is suitable for processing and injecting plastic particles and comprises a feeding mechanism for conveying the plastic particles and heating the plastic particles into molten plastic, an injection driving mechanism for injecting the molten plastic, and an injection feeding mechanism for guiding the molten plastic from the feeding mechanism into the injection driving mechanism. The feeding mechanism includes a pressurizing device for pressurizing and mixing inert gas into the molten plastic. Due to the two-section design of the feeding mechanism and the injection driving mechanism, the molten plastic in the feeding mechanism and the inert gas are not influenced to be mixed and generate bubbles in the molten plastic during the injection action of the injection driving mechanism, the uniformity of the bubbles in the molten plastic is kept, and the yield of the final produced finished product is improved.

Description

Two-stage type injection machine

Technical Field

The utility model relates to a plastic processing equipment especially relates to an ejaculator for carrying out plastics processing and jeting.

Background

The injection molding apparatus for injection molding plastic particles at present generally comprises a material conveying pipe having a material inlet for inputting the plastic particles, a screw rod penetrating the material conveying pipe and driven to rotate for conveying the plastic particles, a heating device disposed on the material conveying pipe for heating the plastic particles into molten plastic, a pressurizing device communicatively mounted on the material conveying pipe for inputting inert gas, and a discharge device communicatively connected to one end of the material conveying pipe away from the material inlet pipe and having a reduced diameter. The discharging device is provided with a discharging port for injecting the molten plastic.

The plastic particles enter the material conveying pipe through the material inlet, are driven by the screw rod to move in the material conveying pipe towards the discharging device, and are heated by the heating device in the moving process to become the molten plastic. Meanwhile, the inert gas is pressurized and mixed into the molten plastic through the pressurizing device, so that the molten plastic is filled with bubbles, and the final finished product has a foaming effect. When the injection molding equipment is used for injecting the molten plastic, the screw is required to be stopped to drive and rotate, the plastic particles are stopped to be fed into the feeding hole, and then the screw is driven to move towards the discharging device, so that the molten plastic is extruded out of the discharging device and is injected from the discharging hole. The relative position of the screw rod and the pressurizing device is changed instantly due to the forward movement of the screw rod and the injection of the molten plastic, so that the phenomenon of uneven distribution and size of bubbles generated by the inert gas injected into the molten plastic is caused, and the quality of the final finished product is poor and the yield is too low.

Disclosure of Invention

An object of the utility model is to provide a can overcome two-stage type ejaculator of at least one shortcoming of background art.

The utility model discloses a two-period form ejaculator is applicable to and carries out the processing of plastic granules and jets out to contain feed mechanism, jet out actuating mechanism, and jet out feed mechanism.

The feeding mechanism comprises a material conveying unit used for conveying the plastic particles towards a material outlet of the feeding mechanism, a heating unit which is arranged on the material conveying unit and used for heating the plastic particles conveyed by the material conveying unit into molten plastic, and a pressurizing device which is arranged on the material conveying unit in a communicating manner and used for pressurizing and injecting inert gas into the material conveying unit. The injection driving mechanism comprises a storage pipe with an extrusion port and an injection unit movably inserted in the storage pipe. The injection unit can be driven to change between a waiting position at which the storage pipe can be used for containing the molten plastic and an injection position at which the molten plastic in the storage pipe is extruded to the extrusion port. The injection feeding mechanism comprises a communicating seat communicated with the discharge port and the extrusion port, a non-return injection nozzle device which is arranged on the communicating seat and can be used for injecting the molten plastic extruded by the extrusion port, and a non-return unit arranged on the communicating seat. The non-return unit can be driven to change between an opening position enabling the discharge port to be communicated with the extrusion port and a closing position blocking the communication between the discharge port and the extrusion port and enabling the molten plastic to be extruded to the non-return injection nozzle device.

The utility model discloses a two-period form ejaculator, this intercommunication seat define out the intercommunication passageway that communicates this discharge gate, communicate this extrusion mouth and this end-to-end penetrate mouth device and communicate the passageway that jets out of this intercommunication passageway, should jet out the passageway and have from this extrusion mouth toward this end-to-end connect the truncated cone form that penetrates mouth device direction and reduce gradually, and from this connect the aperture footpath section that the end equidimension was penetrated to this end-to-end and is penetrated mouth device extension.

The utility model discloses a two-stage type ejaculator, this intercommunication seat still define out the non-return passageway of this intercommunication passageway of intercommunication, should end the unit and have the non-return pole of inserting and establishing at this non-return passageway and the power device who connects this non-return pole, this power device can be used for driving this non-return pole and should open the position making this intercommunication passageway and this passageway intercommunication of ejaculating and block this closed position of this intercommunication passageway and this passageway of ejaculating and remove within a definite time.

The two-stage injection machine of the present invention has an injection rod disposed in the storage tube, and a driving device connected to the injection rod and used for driving the injection rod to move between the waiting position and the injection position.

The utility model discloses a two-period form ejaculator, this defeated material unit have the conveying pipeline, wear to establish the screw rod in this conveying pipeline, and connect in this screw rod and be used for driving this screw rod pivoted and drive the commentaries on classics device.

The utility model discloses a two-stage type ejector, this pressure device intercommunication is installed at this conveying pipeline to be used for injecting this conveying pipeline with inert gas pressurization.

The beneficial effects of the utility model reside in that: through the two-section design of the feeding mechanism and the injection driving mechanism, the molten plastic in the feeding mechanism and the inert gas are not influenced to be mixed and generate bubbles in the molten plastic during the injection action of the injection driving mechanism, the uniformity of the bubbles in the molten plastic is kept, and the yield of the finally produced finished product is improved.

Drawings

Other features and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a top cross-sectional view illustrating an embodiment of a two-stage injection molding machine according to the present invention;

FIG. 2 is a side cross-sectional view illustrating an ejection rod of the embodiment in a standby position;

FIG. 3 is a fragmentary side cross-sectional view illustrating the injection rod of the embodiment in an injection position;

FIG. 4 is a fragmentary top cross-sectional view illustrating a check lever of the embodiment in an open position; and

fig. 5 is a fragmentary top sectional view illustrating the check lever of the embodiment in a closed position.

Detailed Description

Referring to fig. 1-3, an embodiment of the two-stage injection molding machine 1 of the present invention is suitable for processing and injecting plastic particles, and includes a base 3, a feeding mechanism 4 disposed on the base 3, an injection driving mechanism 5 disposed on the base 3 and located below the feeding mechanism 4, and an injection feeding mechanism 6 connected between the feeding mechanism 4 and the front end of the injection driving mechanism 5.

The feeding mechanism 4 comprises a feeding unit 41 for feeding the plastic particles, a heating unit 42 disposed on the feeding unit 41 for heating the plastic particles fed by the feeding unit 41 into molten plastic, and a pressurizing device 43 disposed on the feeding unit 41 and used for pressurizing and injecting inert gas into the feeding unit 41. The feeding unit 41 has a feeding pipe 411 extending horizontally forward and backward, a screw 412 coaxially inserted into the feeding pipe 411 and driven to cooperate with the feeding pipe 411 to feed the plastic particles toward the injection feeding mechanism 6, and a driving device 413 located behind the feeding pipe 411 and connected to the screw 412 for driving the screw 412. A feed inlet 401 for feeding the plastic particles is radially arranged on the outer peripheral surface of the rear section of the feed delivery pipe 411 in a penetrating manner, and a discharge outlet 402 for discharging the molten plastic is arranged at the front end of the feed delivery pipe 411.

The heating unit 42 has a plurality of electric heating elements 421 surrounding the outer periphery of the material conveying pipe 411 and capable of being driven to generate heat to melt the plastic particles in the material conveying pipe 411. Since the installation of the heating unit 42 around the delivery pipe 411 for heat-melting the plastic particles is prior art and numerous, it will not be described in detail. The pressurizing device 43 is communicatively disposed on the material conveying pipe 411, and is used for injecting inert gas into the material conveying pipe 411, so as to mix the inert gas with the molten plastic and fill the molten plastic with bubbles.

The injection driving mechanism 5 includes a storage tube 51 for accommodating the molten plastic, and an injection unit 52 disposed on the base 3 and mounted at the rear end of the storage tube 51. The front end of the stock pipe 51 is provided with an extrusion port 510 for extruding the molten plastic. The injection unit 52 has an injection rod 521 airtightly inserted forward into the magazine 51 movably forward and backward, and a driving device 522 mounted on the base 3 and connected to the rear end of the injection rod 521. The driving device 522 drives the eject lever 521 back and forth between the standby position and the eject position with respect to the magazine 51. When the injection rod 521 is at the waiting position, the front end of the injection rod 521 is far away from the extrusion port 510, so that a storage space 520 which is located between the extrusion port 510 and the injection rod 521 and can be used for containing the molten plastic is formed inside the storage tube 51, and when the injection rod 521 is at the injection position, the front end of the injection rod 521 passes through the extrusion port 510 forward, so that the molten plastic contained in the storage space 520 can be extruded and discharged to the extrusion port 510. In the present embodiment, the driving device 522 is a hydraulic cylinder, but in practice, the driving device 522 for driving the injection rod 521 to move between two positions is various in type, and thus the present invention is not limited to the above embodiment.

Referring to fig. 2-5, the injection feeding mechanism 6 includes a communicating seat 61 straddling the material conveying pipe 411 and the front end of the material storing pipe 51, a non-return unit 62 disposed on the communicating seat 61, and a non-return injection nozzle device 63 communicating with the front side of the communicating seat 61. The communicating base 61 is provided with a communicating channel 601 extending up and down and communicating the top end with the discharge port 402, an ejecting channel 602 extending back and forth and communicating the bottom end of the communicating channel 601 and coaxially communicating the extrusion port 510, and a non-return channel 605 extending left and right and communicating the bottom end of the communicating channel 601. The injection channel 602 has a connecting section 603 in the shape of a truncated cone that gradually reduces in diameter from the extrusion opening 510 toward the non-return nozzle device 63, and a small-bore section 604 that extends forward from the front end of the connecting section 603 in an equal diameter and communicates with the non-return nozzle device 63, so that the molten plastic is pressurized through the reduced injection channel 602 during being extruded from the extrusion opening 510 to the non-return nozzle device 63, thereby facilitating the subsequent injection of the molten plastic into a mold.

The check unit 62 has a check rod 621 inserted into the check passage 605 in a left-right direction, and a power device 622 connected to the right end of the check rod 621 for driving the check rod 621 to move between an open position and a closed position relative to the communicating seat 61. When the check rod 621 is in the open position, the communication channel 601 is communicated with the injection channel 602, so that the communication channel 601 can be used for conveying the molten plastic flowing out from the discharge port 402 through the injection channel 602 and injecting the molten plastic into the storage space 520 of the storage pipe 51; when the check rod 621 is in the closed position, the check rod 621 is inserted into the communicating channel 601 to the left and blocks the communicating channel 601, so that the molten plastic flowing out from the discharge hole 402 cannot enter the storage space 520.

The non-return nozzle device 63 can be controlled to open to inject the molten plastic from the injection passage 602 out of the non-return nozzle device 63, and the non-return nozzle device 63 is a conventional component and thus will not be described in detail.

The utility model discloses when two-stage form ejaculator 1 uses, plastic granules gets into in this conveying pipeline 411 of defeated material unit 41 via this feed inlet 401 to by this screw rod 412 toward the direction drive of this discharge gate 402. The plastic particles are continuously heated by the heating unit 42 to become the molten plastic during the process of moving toward the discharge port 402. Meanwhile, the inert gas input into the material conveying pipe 411 through the pressurizing device 43 is also pressurized and mixed in the molten plastic, so that the molten plastic is filled with bubbles and can be injected into a mold to manufacture a porous foamed product.

The two-stage injection machine 1 operates alternately between a feeding stage and an injection stage, in which the driving device 413 drives the screw 412 so that the molten plastic is driven by the screw 412 in the material conveying pipe 411 and moves toward the material outlet 402, the non-return rod 621 is driven to the open position, the injection rod 521 is driven to the standby position, the material storage pipe 51 generates the material storage space 520, and the non-return nozzle device 63 is driven to close. At this time, the molten plastic from the delivery pipe 411 is injected into the communicating seat 61 through the discharge port 402 and flows toward the extrusion port 510, and is finally injected into the storage space 520 of the storage pipe 51.

When the storage tube 51 is filled with the molten plastic, the two-stage injection machine 1 is switched to the injection stage, the driving device 413 stops driving the screw 412, so that the molten plastic stops moving toward the discharge port 402, and the check rod 621 is driven to move toward the closed position, so that the communication channel 601 is blocked to stop the molten plastic from continuing to be injected into the storage tube 51, then the check nozzle device 63 is driven to open, and then the injection rod 521 is driven to move toward the injection position, and the molten plastic in the storage space 520 is pushed forward into the injection channel 602 to be injected through the check nozzle device 63. During the injection stage, since the non-return rod 621 blocks the communication channel 601 communicating the discharge port 402 and the extrusion port 510, the molten plastic is prevented from flowing back to the material delivery pipe 411 through the communication channel 601 when the injection rod 521 pushes the molten plastic forward into the non-return nozzle device 63.

When the two-stage injection machine 1 is switched to the feeding stage again, the injection rod 521 is driven to return to the waiting position, and during the movement, a negative pressure suction force is generated in the communication channel 601 and the storage pipe 51, so that the molten plastic in the communication channel 601 is rapidly sucked into the storage pipe 51. When the storage space 520 is filled with the molten plastic again, the two-stage injection machine 1 is switched to the injection stage again for the next injection operation.

In the present embodiment, the feeding mechanism 4 is disposed above the injection driving mechanism 5, but in another embodiment of the present invention, the arrangement of the feeding mechanism 4 and the injection driving mechanism 5 is not limited thereto, and may be disposed on the same horizontal plane. On the other hand, the electric heating element 421 of the embodiment is wrapped around the periphery of the material conveying pipe 411 of the feeding mechanism 4, but in another implementation aspect of the present invention, the electric heating element 421 may also be disposed around the periphery of the material storing pipe 51 of the injection driving mechanism 5, or around the periphery of the communicating seat 61 and the non-return nozzle device 63 of the injection feeding mechanism 6.

In summary, the two-stage structure design of the feeding mechanism 4 and the injection driving mechanism 5 prevents the molten plastic in the material conveying pipe 411 from being mixed with the inert gas when the injection driving mechanism 5 injects the molten plastic, so that the bubbles in the molten plastic are distributed and sized uniformly, the quality of the final product is improved, and the yield of the product is improved, thereby being a practical and novel two-stage injection machine 1.

The above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the claims and the description of the present invention are still within the scope of the present invention.

Claims

1. The utility model provides a two-stage type ejaculator, is applicable to and carries out the processing of plastic granules and jets out which characterized in that: the two-section type injection machine comprises a feeding mechanism, an injection driving mechanism and an injection feeding mechanism, wherein the feeding mechanism comprises a material conveying unit used for conveying plastic particles towards a material outlet of the feeding mechanism, a heating unit arranged on the material conveying unit and used for heating the plastic particles conveyed by the material conveying unit into molten plastic, and a pressurizing device which is arranged on the material conveying unit in a communicating manner and used for pressurizing and injecting inert gas into the material conveying unit, the injection driving mechanism comprises a material storage pipe with an extrusion opening and an injection unit movably inserted in the material storage pipe, the injection unit can be driven to change between a waiting position enabling the material storage pipe to be used for containing the molten plastic and an injection position enabling the molten plastic in the material storage pipe to be extruded to the extrusion opening, and the injection feeding mechanism comprises a communicating seat communicated with the material outlet and the extrusion opening, The non-return unit can be driven to change between an opening position enabling the discharge port to be communicated with the extrusion port and a closing position blocking the communication between the discharge port and the extrusion port and enabling the molten plastic to be extruded to the non-return injection nozzle device.

2. The two-stage injection machine of claim 1, wherein: the communicating seat defines a communicating channel communicating with the discharge port, an ejection channel communicating with the extrusion port and the non-return nozzle device and communicating with the communicating channel, the ejection channel has a truncated cone-shaped connecting section gradually reducing from the extrusion port to the non-return nozzle device, and a small aperture section extending from the reducing end of the connecting section to the non-return nozzle device in an equal diameter manner.

3. The two-stage injection machine of claim 2, wherein: the communicating seat also defines a non-return passage communicated with the communicating passage, the non-return unit is provided with a non-return rod inserted in the non-return passage and a power device connected with the non-return rod, and the power device can be used for driving the non-return rod to move between the opening position enabling the communicating passage to be communicated with the injection passage and the closing position blocking the communication between the communicating passage and the injection passage.

4. A two-stage injection machine according to claim 1, 2 or 3, wherein: the injection unit is provided with an injection rod arranged in the storage pipe and a driving device connected with the injection rod and used for driving the injection rod to move between the waiting position and the injection position.

5. The two-stage injection machine of claim 4, wherein: the material conveying unit is provided with a material conveying pipe, a screw rod penetrating through the material conveying pipe and a driving device connected to the screw rod and used for driving the screw rod to rotate.

6. The two-stage injection machine of claim 5, wherein: the pressurizing device is communicated with and arranged on the material conveying pipe and is used for pressurizing and injecting inert gas into the material conveying pipe.