KR101552571B1

KR101552571B1 - Injection molding machine

Info

Publication number: KR101552571B1
Application number: KR1020140003572A
Authority: KR
Inventors: 윤기환
Original assignee: 윤기환
Priority date: 2014-01-10
Filing date: 2014-01-10
Publication date: 2015-09-14
Also published as: KR20150083710A

Abstract

The present invention can reduce the volume of the mold by arranging the mold clamping apparatus on the upper body and improve the structure of the mold to increase the safety of the worker by using a safety device that automatically or manually prevents the fall- The present invention relates to a low-profile injection molding machine.
A low-profile injection molding machine includes an injector frame having an upper body, a lower body, and a lifting body that is vertically movable between upper and lower bodies, and an injector having a nozzle for supplying a liquid injection material into the mold, A lifting cylinder mounted on left and right sides of the upper body and provided with an upper and lower lifting force to the lifting body coupled with the upper mold and a lower lifting cylinder mounted on the left and right sides of the upper body, A work table provided on the upper side of the lower body and provided with a lower metal mold on the upper side; and a work table for selectively locking the elevated body to the upper body to prevent a sharp fall of the elevated body And a stopper means provided in a plurality of guide rods for guiding the fall preventing means and the ascending and descending operation of the ascending and descending body and restricting the descending height of the ascending and descending body.

Description

[0001] INJECTION MOLDING MACHINE [0002]

[0001] The present invention relates to a low-profile injection molding machine, and more particularly, to a safety device for preventing falling of an elevating body automatically or manually during an injection process by arranging a mold clamping device on an upper body, To a low-profile injection molding machine having an improved structure so as to greatly increase the safety of an operator

In general, an injection molding machine can be roughly divided into two types. The injection molding machine is installed so that the injection mold is vertically opened and closed vertically to the injection molding machine. The injection molding machine, which melts the injection molding material and injects the molding material into the mold, In which the mold is placed horizontally left and right open and closed with respect to the injection apparatus, and the injection apparatus is horizontally moved in the lateral direction Format.

The mouth type is suitable for injection of an insert product mainly because the mold is vertically opened and closed with respect to the injection apparatus, and the transverse type injection apparatus is suitable for molding a product which is completed by one injection.

In brief, the structure of the mouth type injector apparatus includes an injector apparatus for injecting granular injection material into a mold die, a cylinder for vertically moving the injector apparatus and the mold die vertically so as to be separated and closed by upper and lower dies And a hydraulic cylinder for supplying hydraulic pressure to the body and the injector apparatus.

As an example of a conventional mouth-type release device, a three-stage support body is provided as described in Korean Utility Model Laid-Open Utility Model Publication No. 1996-026848 entitled " liquid silicone injection machine "(published on August 18, 1996) An upper cylinder is installed on the bottom plate of the middle plate, an air cylinder is installed on the upper plate, the cylinder rod is fixed to the silicon cylinder, So that the silicon can be injected into the injection hole of the upper mold while moving up and down.

Conventional injection machines employ a turntable to continuously perform injection and demolding processes so as to improve the productivity of a process of injecting injection materials and demolding.

Conventional prior art related thereto is fixed to the inside of a vertical injection machine as described in Korean Patent Registration No. 10-0553611 entitled " Rotary Device of Vertical Injection Molding Machine "(Registered on Feb. 23, 2006) A formed fixed table; A rotary table which is seated on the upper side of the fixed table and has a mold fixed on its upper surface and which is rotated in the forward and reverse directions about the central axis; A rotary shaft having one end fixed to the rotary table by passing through the through hole of the fixed table and the outer peripheral surface of the other side being formed with a threaded portion; A pair of rack members coupled to one side of the threaded portion of the rotating shaft and rotating the rotating shaft while being moved forward and backward by the first cylinder; A housing having a horizontal penetrating portion to which the vertical penetrating portion to which the rotating shaft is coupled and the rack member are coupled to receive the rotating shaft and the rack member and the lower end of the fixed table; And a rotating shaft lifting means on the lower side of the housing.

In the conventional vertical injection machine, since the cylinder is disposed in the lower body, a minimum space for raising and lowering the upper mold disposed in the upper body is secured. Therefore, the height of the turntable, which becomes the work table, It is necessary to carry out the work while the worker is on the scaffold, so that it is difficult to maintain the worker, and when the worker hurts the worker due to the height of the injection machine, There was a risk of safety accidents.

In addition, the existing injection molding machine is required to have additional safety measures, as it may cause a safety accident of the operator when the upper mold, which is operated by the cylinder to move up and down by the cylinder, falls due to a cause of malfunction such as oil leakage.

Korean Registered Utility Model Publication No. 1996-026848 entitled "Liquid Silicon Injection Mold" (Published on August 17, 1996) Korean Patent Registration No. 10-0553611 entitled "Rotary Device for Vertical Injection Molding Machine" (Registered on Feb. 23, 2006)

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and its object is to provide a safety device for preventing the fall of an upper mold, And to provide a low-profile injection molding machine improved to further enhance safety.

According to an aspect of the present invention, there is provided an injection molding machine including an upper body, a lower body, an injector frame having an elevating body disposed between the upper body and the lower body,

An injection table mounted on the upper body for supplying the injection material into the mold,

A lifting cylinder mounted on the upper body to apply upward and downward force to the lifting body to which the upper mold is coupled; and a lifting cylinder mounted on the upper body to apply a pressing force to the lifting body, A cylinder,

A work table installed above the lower body and provided with a lower mold at an upper side thereof,

A falling preventive means for selectively locking the lifting body to the upper body to prevent a sharp fall of the lifting body;

And stopper means provided on a plurality of guide rods for guiding the lifting and lowering operation of the lifting body to limit the height of the lifting body.

The falling prevention means includes a safety bar which is vertically erected on an upper portion of the lifting body and has a plurality of locking grooves formed on an outer peripheral surface thereof and a locking bar which is mounted on the upper body and protrudes in a horizontal direction by hydraulic pressure or air pressure supplied from the outside And a locking cylinder for locking the locking groove with one of the locking grooves.

The stopper means includes a stopper block coupled to a lower portion of at least one guide bar of the guide rods and restricting a lowering height of the lifting body when the lower surface of the lifting body contacts the upper portion during a lowering operation of the lifting body.

The height of the upper surface of the stopper block is lower than the height of the lower mold.

And a safety means for sensing a descending operation of the ascending / descending body and urgently stopping the descending operation of the ascending / descending body.

The safety means includes first and second sensing sensors disposed at upper and lower positions respectively spaced upward from the lower body and corresponding to a lowering permitting interval of the lifting body to sense a lowering motion of the lifting body,

A controller for receiving a signal sensed by the first and second sensing sensors and outputting a control signal for operating the fall prevention unit when the lifting body is moved to a position lower than the lowering allowable period to stop the lowering operation of the lifting body; Respectively.

The present invention can reduce the height of the work table as the elevating cylinder and the pressurizing cylinder are mounted on the upper body, unlike the existing vertical injection machine in which the worker works on the foot plate, thereby improving workability and safety, It is advantageous in that an accidental accident during work can be prevented by sensing the abnormal descent of the lifting body and preventing the lifting body from falling automatically or manually.

1 is a perspective view showing a configuration of a low-profile injection molding machine according to the present invention;
Figure 2 is a front view of Figure 1;
3 is a plan view of the low-profile injector device of the present invention.
4 is a front view of a low-phase injection molding machine to which the fall preventing means and the safety means are applied.
5 is a view showing a configuration of a fall prevention means of the present invention.
6 is a side view showing a state in which the safety means of the present invention is applied.

1 to 6, a low-profile injection molding machine according to the present invention includes an upper and lower bodies 110 and 120, and an injector frame 130 in which a vertically movable lifting body 130 is disposed between the upper and lower bodies 110 and 120 And an injection unit 200 mounted on the upper body 110 and having a nozzle for supplying a liquid injection material into the mold. A pressurizing cylinder 320 which is mounted on the upper body 110 and applies a downward pressing force to the upper mold 10 and a pressurizing cylinder 320 which is provided on the upper side of the lower body 120, A work table 500 installed on the upper body 110 and provided with a lower mold 20 on the upper body 110 and a work table 500 for selectively locking the body 110 on the upper body 110 to prevent a sharp fall of the lifting body 130 Fall preventing means 600 and a plurality of guide rods 350 for guiding the lifting operation of the lifting body 130 Consists of a stopper means for limiting the falling height of the steel body (130).

Referring to FIG. 1, the injector frame 100 includes upper and lower bodies 110 and 120 spaced upward and downward, and a lifting and lowering body 130 is vertically disposed between the upper and lower bodies 110 and 120 .

The injection stand 200 includes a heater for applying heat to the solid injection material to liquidize the liquid injection material, and a nozzle for supplying the liquid injection material into the mold.

The mold frame is fixed to the lifting body 130 and is coupled to the lifting body 130 to be lifted and lowered and a lower mold 120 provided on the upper part of the work table 500 provided above the lower body 120 20).

Referring to FIG. 2, the lower body 120 is provided with an injector 800 for demolding the injection molded article from the mold.

The lifting cylinder 310 and the pressurizing cylinder 320 are mounted on the upper body 110 to lift and lower the respective rods to lift the lifting body 130 or to apply the pressing force for the injection process to the upper mold 10 .

3, the lifting cylinder 310 is provided on both left and right sides of the upper body 110 and has a function of lifting up and lowering the lifting body 130 by hydraulic pressure or air pressure supplied from the outside.

The pressurizing cylinder 320 is provided on both left and right sides of the upper body 110 and has a function of providing the lower pressurizing force to the upper mold 10 by hydraulic pressure or air pressure supplied from the outside.

4 and 5, the fall preventing unit 600 includes a safety bar 610 vertically disposed on an upper portion of an elevating body 130 and having a plurality of locking grooves 615 formed on an outer circumferential surface thereof, And a locking cylinder 620 which is mounted on the main body 110 and protrudes and retracts the locking rod 625 horizontally by hydraulic or pneumatic pressure supplied from the outside and locks the locking rod 625 to one of the locking grooves 615.

The safety bar 610 is configured in the form of a round bar and has a structure in which a locking groove portion 615 having a concavo-convex shape is formed on the outer circumferential surface.

The stopper means is coupled to a lower portion of at least one of the guide rods 350 so that the lower surface of the lifting body 130 contacts the upper portion of the lifting body 130 during the lowering operation of the lifting body 130, And a stopper block 410 for limiting the stopper block 410.

It is preferable that the stopper block 410 is formed such that the upper surface thereof is located at a height lower than the bottom surface height of the lower mold 20 so as not to interfere with the injection process during the lowering operation of the upper mold 10 .

Referring again to FIG. 4, the present invention further includes safety means 700 for detecting the descending operation of the lifting body 130 and urgently stopping the abnormal descending operation of the lifting body 130 to protect the safety of the worker .

As shown in FIGS. 4 and 6, the safety means is disposed at an upper portion and a lower portion of the lifting body 130, respectively, spaced upward from the lower body 120, A first sensing sensor 710 and a second sensing sensor 720 disposed on the upper portion of the lifting body 130 to detect a lowering motion of the lifting body 130, And a control unit 730 for outputting a control signal for operating the fall prevention unit 600 in response to a signal sensed by the two detection sensors 710 and 720 and stopping the lowering operation of the lifting body 130.

The first and second detection sensors 710 and 720 are disposed on the inner side of the cover 105 that surrounds the injector frame 100 from above and below the height corresponding to the falling allowance A of the lifting body 130 Sensing the lowering region of the lifting body 130 and sensing an abnormal lowering motion of the lifting body 130. For example, the sensor may be an optical sensor.

The control unit 730 compares the signals applied from the first and second detection sensors 710 and 720 and detects an abnormal lowering operation of the lifting body 130 and then outputs an electrical control signal to the fall prevention unit 600, The external force is supplied to the side of the locking cylinder 620 and the downward movement of the safety bar 610 is restricted to stop the lifting body 130.

It is preferable that the present invention further includes stop switches 750A and 750B provided on the outer side of the cover 105 of the lower body 120 or the control unit 730 to output an emergency stop signal to the control unit 730 .

In the low-profile injection molding machine of this invention, the injection material (silicon) is supplied to the injection stand 200 and the supplied injection material is heated by a heater to be liquefied by a liquid injection material, The lifting cylinder 310 is operated to lower the lifting body 130 and the upper mold 10 and the lower mold 20 are engaged with each other using the pressurizing cylinder 320, So as to form an injection product.

At this time, the upper mold 10 and the lower mold 20 are separately mounted on the upper side of the work table 500, and the upper mold 10 is mounted on the lower side of the ascending / descending body 130.

The work table 500 may employ a rotary system employing a turntable and a sliding system that is moved forward and backward. Here, the rotary system will be described.

After the injection molding, one of the lower molds 20 provided on the upper surface of the work table 500 is positioned above the injector capable of demoulding the article during rotation of the work table 500, The remaining lower mold 20 provided on the upper surface of the table 500 is rotated to be positioned below the upper mold 10 capable of performing the injection process.

Thereafter, the injection molding process is performed while the upper mold 10 is lowered to the lower mold 20 side. In addition, the injector pin of the injector is raised to push up the molded article to be separated from the lower mold 20 The desorption process is performed.

The falling preventing means 600 for preventing the falling of the lifting body 130 is normally located at a position where the end of the locking rod 625 does not interfere with the locking groove portion 615 of the safety bar 610, When the lifting body 130 is abnormally dropped due to the leakage of the hydraulic pressure or the pneumatic pressure supplied to the pressure cylinder 320 and the lifting cylinder 310 to the outside of the lifting cylinder 130, The locking rod 625 of the locking cylinder 620 is advanced to the outside and enters the locking groove portion 615 of the safety bar 610 to be interfered with the locking groove portion 615, Thereby limiting the descent of the bar 610.

The fall prevention unit 600 has a function of stopping the falling operation when the controller 730 determines based on the sensing signal sensed by the first and second sensing sensors 710 and 720 of the safety means and then the abnormal descent of the ascending / .

The operation of the fall prevention means 600 is not limited to the operation using the determination of the control unit 730 described above but also the operation of the fall prevention means 600 by urging the operator manually to operate the stop switches 750A and 750B The fall of the lifting body 130 can be stopped.

The stopper block 410 is disposed at a lower portion of the guide rod 350 for guiding the lifting operation of the lifting body 130. The upper surface of the stopper block 410 is fixed to the lower mold 20, The upper surface of the stopper block 410 is positioned at a position lower than the top surface of the lower mold 20 when the lower end of the stopper block 410 is lowered to a position lower than the lowering allowable portion A, So that it is possible to prevent a safety accident from being injured by the operator.

In the present invention described above, unlike a conventional vertical injection machine in which a worker operates on a foot plate, the elevation cylinder 310 and the pressure cylinder 320 are mounted on the upper body 110 to lower the height of the work table So that the workability and safety are improved, and an abnormal descent of the lifting body 130 is sensed to prevent a fall of the lifting body 130 automatically or manually, thereby preventing a safety accident during a work.

10: upper mold 20: lower mold
100: Injector frame 105: Cover
110: upper body 120: lower body
130: lifting body 200:
310: lift cylinder 320: pressure cylinder
350: guide rod 410: stopper block
500: Work table 600: Fall prevention means
610: safety bar 615: locking groove
620: Locking cylinder 625: Locking rod
700: Safety means 710, 720: 1st and 2nd detection sensors
730: Control unit 750A, 750B: Stop switch
800: Injector A: Allowable falling section

Claims

An injector frame 100 in which an elevating body 130, which can be elevated, is disposed between the upper and lower bodies 110 and 120 and between the upper and lower bodies 110 and 120;
An injection chamber 200 mounted on the upper body 110 for supplying the injection material into the mold;
A lifting cylinder 310 mounted on the left and right sides of the upper body 110 to apply upward and downward force to the lifting body 130 coupled with the upper mold 10;
A pressurizing cylinder 320 mounted on the left and right sides of the upper body 110 to apply a pressing force to the elevating body 130 so that the lower pressing force is applied to the upper mold 10;
A work table 500 installed on the upper side of the lower body 120 and provided with a lower mold 20 on the upper side thereof;
(600) for selectively locking the lifting body (130) to the upper body (110) to prevent a sharp fall of the lifting body (130); And
And stopper means provided in a plurality of guide rods (350) for guiding the lifting operation of the lifting body (130) to limit the descending height of the lifting body (130)
The stopper means is coupled to a lower portion of at least one guide rod 350 to limit the lowering height of the lifting body 130 when the lower surface of the lifting body 130 contacts the upper portion during the lowering operation of the lifting body 130. [ The stopper block 410 is formed to be lower than the height of the lower mold 20 so that the height of the upper surface of the stopper block 410 is lowered so as to stop the abnormal lowering operation of the lifting body 130 Safety means,
The safety means is disposed at upper and lower positions corresponding to the lowering permitting section A of the lifting body 130 and is arranged to be spaced upward from the lower body 120, A first sensing sensor 710 and a second sensing sensor 720 for sensing the movement of the lifting body 130. When the lifting body 130 is moved to a position lower than the lowering permitting interval A, And a control unit (730) for outputting a control signal for operating the fall preventing unit (600) to stop the lowering operation of the lifting body (130).

The method according to claim 1,
The fall preventing means 600 includes a safety bar 610 vertically disposed on the upper portion of the lifting body 130 and having a plurality of locking grooves 615 formed on an outer peripheral surface thereof,
And a locking cylinder 620 mounted on the upper body 110 and protruding and retracting the locking rod 625 in a horizontal direction by hydraulic or pneumatic pressure supplied from the outside and lockingly coupling the locking rod 625 with one of the locking grooves 615 Wherein the low-profile injector device is a low-profile injector device.

The method according to claim 1,
And a stop switch (750A, 750B) for outputting an emergency stop signal to the cover of the lower body (120) and the control unit (730).

The method according to claim 1,
Wherein the lower body (120) is provided with an injector (800) for demolding the injection molded article from the mold.

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