KR101512319B1

KR101512319B1 - Electric injection molding machine able to measure for elongation and parallelization

Info

Publication number: KR101512319B1
Application number: KR20140147520A
Authority: KR
Inventors: 전갑용
Original assignee: (주)태일기계
Priority date: 2014-10-28
Filing date: 2014-10-28
Publication date: 2015-04-15

Abstract

The present invention relates to a rear mold plate (100); A crosshead (200); Toggle link 300; A movable plate 400; It is possible to measure the elongation and the parallelism which can measure the elongation rate which increases as the parallelism of the tie-bar constituting the electric injection molding machine including the fixed plate 500 and the tie bar 600 decreases To an electric injection molding machine.
The present invention is characterized in that the position sensor 420 is provided on the inner surface of the insertion port 410 formed on the outer side of the edge of the movable plate 400 and the position identification means 610 is provided on the outer surface of the tie bar 600, ) And the resulting increase in elongation can be measured.

Description

ELECTRIC INJECTION MOLDING MACHINE ABLE TO MEASURE FOR ELONGATION & PARALLELIZATION < RTI ID = 0.0 >

The present invention relates to an electric injection molding machine capable of measuring elongation and parallelism, which can measure an elongation which is increased as the degree of parallelism of a tie-bar constituting an electric injection molding machine decreases.

More specifically, a rear mold plate 100 having a plurality of insertion holes 110 formed outside its corners and including a ball screw 130 on one surface thereof; A crosshead 200 connected to the ball screw 130 of the rear mold 100 to move forward or backward in the direction of the rear mold 100; A toggle link 300 connected to one end of the selected one of the upper and lower ends of the crosshead 200 and operated to be opened or folded by the forward or backward movement of the crosshead 200; A moving plate 400 connected to the other end of the toggle link 300 that is not connected to the crosshead 200 and having a plurality of insertion ports 410 formed outside the corners; A fixed plate 500 formed on the opposite side of the toggle link 300 with respect to the movable plate 400 and having a plurality of insertion ports 510 formed outside the corner; And a tie bar 600 passing through the insertion holes 110, 410 and 510 to connect the rear mold plate 100, the movable mold plate 400 and the fixed mold plate 500, To an electric injection molding machine.

The present invention is characterized in that the position sensor 420 is provided on the inner surface of the insertion port 410 formed outside the corner of the movable plate 400 and the position identification means 610 is provided on the outer surface of the tie bar 600, ) And the resulting increase in elongation can be measured.

In general, the injection molding machine is divided into an injection part, a mold part and a control part. The mold part is composed of a fixed plate provided adjacent to the nozzle of the injection part and a movable plate arranged corresponding to the fixed plate. A mold clamping mechanism for opening and closing is provided on one side of the movable plate.

A cavity of a specific shape is formed between the stationary plate and the movable plate. Resin is injected from the nozzle into the cavity of the template, and the resin filled in the cavity is hardened to achieve a desired shape.

Such an electric injection molding machine is a structure using a toggle link, which is shown in Fig.

Fig. 5 shows a conventional electric injection molding machine.

A three-stage mold is disposed between the stationary plate 10 and the movable plate 12 as shown in FIG. 5 of the accompanying drawings, and the three-stage mold is moved in the closed state by driving the movable plate 12 Injection molding is performed by injecting the molding material into the corresponding three-stage mold.

The movable plate 12 is driven in the left and right direction in the drawing by moving the crosshead 20 by the rotation of the ball screw 19 and driving the toggle link 14 so as to mold the three- When the movable plate 12 is driven in the direction of the fixed plate 10 (right direction in the figure), the three-stage metal mold is closed , And when the movable plate 12 is driven in the direction of the die plate 11 (leftward in the drawing), the three-stage die is opened.

The movable plate 12 transfers the rotational force generated by the driving of the mold feed motor 18 to the pulley 21 through the pulley 22 and the belt 23 to rotate the ball screw 19, 20 are moved leftward and rightward, and the toggle link 14 is linearly moved to be driven in the left and right directions in the drawing.

The movable plate 12 connected to the toggle link 14 is moved in the left and right direction by the same amount as the movable plate 12 connected to the toggle link 14, The height can be adjusted.

Meanwhile, the electric injection molding machine as described above has a problem that the parallelism of the tie bar may be lowered due to the continuous movement of the movable plate and / or the cumulative tolerance generated at the time of initial assembly, thereby increasing the elongation.

Because of this problem, it is not possible to inject a molded product of good quality. To solve this problem, it is necessary to be able to measure the elongation of the tie bar.

To this end, an auxiliary device capable of measuring various elongation ratios has been developed in recent years. In particular, an auxiliary device for measuring elongation using a rod having a dial gauge is mainly used.

However, such an elongation measurement assisting device has the problem that it is necessary to stop the operation of the injection molding machine in order to measure elongation, and there is a problem that efficient molding work can not be performed.

In addition, the elongation measurement assisting device is a device which can passively measure the elongation rate and can not be confirmed by the user when the elongation rate is continuously increased (or the degree of parallelism is decreased).

On the other hand, a mold clamping force detection method is disclosed in Japanese Patent Application Laid-Open No. 10-2009-001514 in relation to a technique capable of detecting deformation of a tie bar without stopping the operation of the injection molding machine.

The above-described technique detects a mold-clamping force based on an output from a deformation detecting device provided in a mold-clamping device of a molding machine, and more particularly, to a mold- Value.

At this time, the deformation detecting device detects the elongation of the tie bar by using a strain gauge, and can detect the elongation of the tie bar by being attached to the tie bar and stretched and contracted together with the tie bar.

In summary, in order to detect the mold-clamping force of the molding machine, the above-described technique can detect the degree of extension (stretching) of the tie bar when the mold is in the limit state during injection molding, It is not possible to detect the deformation of the parallelism of the tie bars.

That is, the above-described technique is also unable to detect an increase in elongation or a decrease in parallelism by continuously measuring the elongation of the tie bar during the operation of the injection molding machine.

Therefore, even if the electric injection molding machine is in operation for the molding operation, development of a technique capable of continuously measuring the parallelism of the tie bar and measuring the parallelism or elongation of the tie bar without stopping the operation of the injection molding machine Is required.

Published Patent Publication No. 10-2009-0015145 (Feb.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a rear mold 100 having a plurality of insertion holes 110 formed on an outer side of corners thereof and including a ball screw 120 on one side thereof; A crosshead 200 connected to the ball screw 130 of the rear mold 100 to move forward or backward in the direction of the rear mold 100; A toggle link 300 connected to one end of the selected one of the upper and lower ends of the crosshead 200 and operated to be opened or folded by the forward or backward movement of the crosshead 200; A moving plate 400 connected to the other end of the toggle link 300 that is not connected to the crosshead 200 and having a plurality of insertion ports 410 formed outside the corners; A fixed plate 500 formed on the opposite side of the toggle link 300 with respect to the movable plate 400 and having a plurality of insertion ports 510 formed outside the corner; And a tie bar 600 passing through the insertion holes 110, 410 and 510 to connect the rear plate 100, the movable plate 400 and the fixed plate 500, Which is capable of measuring an elongation rate and an parallelism which can be measured even during operation of an electric injection molding machine, the elongation rate being increased as the degree of parallelism of the electric motor increases.

Another object of the present invention is to provide a position sensor 420 on the inner surface of the insertion port 410 formed outside the corner of the movable plate 400 and having the position identifying means 610 on the outer surface of the tie bar 600, It is an object of the present invention to provide an electric injection molding machine capable of measuring a decrease in parallelism of a tie bar 600 and a corresponding increase in elongation.

According to an aspect of the present invention, there is provided an electric injection molding machine capable of measuring an elongation and a parallelism,

The motor-driven injection molding machine capable of measuring the elongation and parallelism according to the present invention can measure the elongation of the tie bar even if the injection molding machine is in operation, so that the operation of the injection molding machine does not have to be stopped for measuring the elongation of the tie bar It is possible to improve the efficiency of the operation and to have a remarkable effect of molding a product of high quality.

FIG. 1 schematically shows the construction of an electric injection molding machine capable of measuring elongation and parallelism according to the present invention.
Fig. 2 is a schematic view showing the front structure of a rear mold plate in an electric injection molding machine capable of measuring elongation and parallelism according to the present invention.
FIG. 3 is a schematic view showing the construction of a crosshead in an electric injection molding machine capable of measuring elongation and parallelism according to the present invention.
FIG. 4 is a schematic view of a position sensor formed in a tie bar and a position sensor formed in an insertion port of a movable plate, in an electric injection molding machine capable of measuring elongation and parallelism according to the present invention.
Fig. 5 shows a conventional electric injection molding machine.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor can properly define the concept of the term to describe its invention in the best possible way And should be construed in accordance with the principles and meanings and concepts consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents And variations are possible.

Before describing the present invention with reference to the accompanying drawings, it should be noted that the present invention is not described or specifically described with respect to a known configuration that can be easily added by a person skilled in the art, Let the sound be revealed.

The present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic view showing the construction of an electromechanical injection molding machine capable of measuring elongation and parallelism according to the present invention. FIG. 2 is a front view of the rear mold plate in an electric injection molding machine capable of measuring elongation and parallelism according to the present invention. Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention, A crosshead (200); Toggle link 300; A movable plate 400; And includes a fixed plate 500 and a tie bar 600.

The rear mold plate 100 has a plurality of insertion holes 110 formed outside the corners.

Here, the outer side of the corner may mean four sides in a diagonal direction as shown in the accompanying drawings, which is the same as the insertion holes 410 and 510 of the movable plate 400 and the fixed plate 500 to be described later.

The insertion ports 110, 410, and 510 may be formed as a plurality of insertion holes 110, 410, and 510, respectively. As shown in the accompanying drawings, the insertion holes 110, 410, and 510 may be formed to correspond to each other.

The rear mold plate 100 may include a servo motor 120 capable of driving the ball screw 130 and the ball screw 130 on one side.

And the screw screw 140 may be connected to the ball screw 130 to convert the rotational motion of the ball screw 130 into a linear motion.

As shown in FIG. 2, the ball screw 130 is connected to the server motor 120 and can be rotated by driving the servo motor 120.

The crosshead 200 is connected to the screw 140.

The crosshead 200 is connected to a toggle link 300 described later, and the toggle link 300 can be folded or expanded according to forward or backward movement of the crosshead 200.

The structure of such a crosshead 200 will be described with reference to FIG. 3 of the accompanying drawings.

FIG. 3 is a schematic view showing the construction of a crosshead in an electric injection molding machine capable of measuring elongation and parallelism according to the present invention.

The crosshead 200 can mainly include a main moving means 210, an auxiliary moving means 220 and a toggle link connecting portion 230.

The main moving means 210 is fastened to the screw thread 140 and can be moved forward or backward according to the rotation of the screw thread 140. [

The auxiliary template 220 may be provided on both sides of the rear template 100 with respect to the screw thread 140. The auxiliary template 220a may be coupled to the auxiliary template 220, .

In addition, it is preferable that the main moving means 210 and the auxiliary moving means 220 are connected to operate in conjunction with each other.

As shown in FIG. 3, a toggle link connecting portion 230 may be formed between the main moving means 210 and the auxiliary moving means 220 on both sides thereof.

The toggle link connection unit 230 connects any one of a plurality of nodes of the toggle link 300, which will be described later.

Accordingly, when the crosshead 200 is moved forward or backward, the toggle link 300 connected through the joints is opened or folded, and consequently, the injection molding machine can be opened or closed.

The toggle link 300 may be connected to one end of the selected one of the upper and lower ends of the crosshead 200.

In other words, although the toggle link 300 is shown as being connected in the upper and lower directions in the attached drawings, it may be designed to be connected only in the upward direction or only in the downward direction depending on other design conditions It is.

The movable plate 400 is connected to the other end of the toggle link 300 that is not connected to the crosshead 200. The toggle link 300 is opened or closed by the folding or unfolding operation of the toggle link 300, So that the injection can be performed.

The movable plate 400 is movable through a tie bar 600 passing through a plurality of insertion ports 410

The fixed plate 500 is formed on the opposite side of the toggle link 300 with respect to the movable plate 400 as described above, and a plurality of insertion holes 510 may be formed outside the corners.

A cavity may be formed between the fixed plate 500 and the movable plate 400, which is general in the field of injection molding machines, and thus a detailed description thereof will be omitted.

And a tie bar 600 passing through the insertion ports 110, 410 and 510 to connect the rear mold plate 100, the movable mold plate 400 and the fixed mold plate 500. The elongation rate and the parallelism can be measured To an electric injection molding machine.

The tie bar 600 may function to connect the rear mold 100, the movable mold 400, and the fixed mold 500 through the insertion holes 110, 410, and 510 described above.

That is, the tie bar 600 is preferably formed in a number corresponding to the number of the insertion holes 110, 410, 510, and conversely, the respective insertion holes 110, 410, 510 may be connected through the tie bar 600 It is preferable that they are formed at positions where they can correspond to each other in a straight line.

Such a tie bar 600 can be reduced in parallelism by the continuous movement of the movable plate 400 as described above and thus the elongation can be increased.

Such an increase in elongation is an obstacle to injection of excellent products. In order to perform more efficiently, it is necessary to continuously measure the elongation of the tie bar 600 without stopping the operation of the injection molding machine during the injection molding.

To this end, in the present invention, the position identifying means 610 may be formed on the tie bar 600, and the position sensor 420 may be formed on the insertion port 410 of the movable plate 400.

This will be described with reference to FIG. 4 of the accompanying drawings.

FIG. 4 is a schematic view of a position sensor formed in a tie bar and a position sensor formed in an insertion port of a movable plate, in an electric injection molding machine capable of measuring elongation and parallelism according to the present invention.

As shown in FIG. 4 of the accompanying drawings, a position sensor 420 may be formed on one side of the inner surface of the insertion port 410 of the movable plate 400.

In the outer surface of the tie bar 600, the position identifying means 610 may be formed at a certain interval in a region of the moving plate 400 that is in contact with the insertion port 410.

At this time, the position identifying means 610 is formed in all of the plurality of tie bars 600, and they are all preferably formed at the same interval.

For example, when four tie bars are used, they will be described as A, B, C and D tie bars. Five of the outer surfaces of the tie bars are formed at equal intervals on one side of the outer surface of the tie bars that abuts the insertion port 410.

At this time, when the movable plate 400 is moved, the A, B, and C tie bars are detected by the position sensor as the third position identifying means, and the D tie bar assumes that the third position identifying means is not detected by the position sensor , It can be recognized that the parallelism of the D-tie bar is decreased, that is, it can be detected that the elongation has been increased.

The degree of elongation detected as described above may be designed so that a separate monitor device (not shown) is connected to output information.

The motor-driven injection molding machine capable of measuring the elongation and parallelism according to the present invention as described above can measure the elongation of the tie bar even if the injection molding machine is in operation. Therefore, the operation of the injection molding machine It is possible to improve the efficiency of the operation and to mold the product of high quality.

1 to 4, only the main points of the present invention are described. As various designs can be made within the technical scope of the present invention, the present invention is limited to the configurations of Figs. 1 to 4 It is self-evident.

100: rear mold plate 110, 410, 510:
120: Servo motor 130: Ball screw
140: screw thread 200: crosshead
210: main moving means 220: auxiliary moving means
220a: auxiliary moving means supporting member 230: toggle link connecting portion
300: toggle link 400: movable plate
420: Position sensor 500: Fixed plate
600: Tie bar 610: Position identification means

Claims

A rear mold plate 100 having a plurality of insertion holes 110 formed on an outer side of a corner thereof and having a ball screw 130 formed on one surface thereof and a screw screw 140 connected to the ball screw 130 formed on the other surface thereof;
A crosshead 200 connected to the screw screw 140 to move forward or backward in the direction of the rear mold 100;
A toggle link 300 connected to one end of the selected one of the upper and lower ends of the crosshead 200 and operated to be opened or folded by the forward or backward movement of the crosshead 200;
A moving plate 400 connected to the other end of the toggle link 300 that is not connected to the crosshead 200 and having a plurality of insertion ports 410 formed outside the corners;
A fixed plate 500 formed on the opposite side of the toggle link 300 with respect to the movable plate 400 and having a plurality of insertion ports 510 formed outside the corner; And
A plurality of tie bars 600 passing through the insertion holes 110, 410, and 510 to connect the rear template 100, the moving plate 400, and the fixed plate 500; Wherein the motor-driven injection molding machine comprises:
The rear mold plate (100)
Further comprising an auxiliary moving means supporting member (220a) on both sides of the screw thread (140)
The crosshead (200)
Main moving means 210 fastened to the screw thread 140;
An auxiliary moving means (220) fastened to the auxiliary moving means supporting member;
And a toggle link connection part (230) formed between the main movement device (210) and the auxiliary movement device (220) and connected to the toggle link (300)
A position sensor 420 is formed on the inner surface of the insertion port 410 of the movable plate 400,
The tie bar (600)
A position identifying means 610 is formed on one side of the outer surface which abuts against the movable plate 400,
Wherein the tie bar (600) having a reduced degree of parallelism among the plurality of tie bars (600) can be detected during operation of the electric injection molding machine.

delete

The method according to claim 1,
The tie bar (600)
And the number of the insertion ports (110, 410, 510) is set to a number corresponding to the number of the insertion ports (110, 410, 510).

The method of claim 4,
The insertion ports 110, 410,
And the tie bar (600). The motor-driven injection molding machine according to any one of claims 1 to 5, wherein the tie bar (600) and the tie bar (600)