KR20160141405A - Half nut clamping apparatus for injection molding machine - Google Patents

Abstract

The present invention relates to a clamping apparatus of a half nut for an injection molding machine. The clamping apparatus of a half nut for an injection molding machine is capable of simultaneously clamping left and right half nuts by a simple structure and has a strong clamping force with a tie bar. The clamping apparatus of a half nut for an injection molding machine comprises a connection bar, a first support member coupled to one end of the connection bar; and a second support member coupled to the other end of the connection bar.

Description

HALF NUT CLAMPING APPARATUS FOR INJECTION MOLDING MACHINE [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a half nut fastening mechanism of an injection molding machine, and more particularly, to a half nut fastening mechanism of an injection molding machine which can simultaneously fasten two left and right half nuts by a simple structure.

The injection molding machine comprises a pair of molds 11 and 21 formed with a cavity according to the shape of the article to be manufactured and moldable and moldable, a stationary plate 10 on which the respective molds 11 and 21 are mounted, And generally includes a template 20.

And a transfer device (40) for transferring the movable mold plate (20) along the tie bar (30), wherein the tie bar (30) guides the movable mold plate (20) And a half nut 50 for locking or releasing the movement of the movable die plate 20.

When the booster cylinder 40 applies hydraulic pressure, the movable mold 20 and the movable mold 21 move in the direction of the stationary mold 10 and the stationary mold 11 and come in close contact with each other.

When the hydraulic pressure is applied to the hydraulic cylinder operating the half nut 50, the half nut advances and is fastened and fixed to the tie bar 30. [

In this injection molding machine, the molten resin is injected into the cavities of the molds 11 and 12 while the molds 11 and 21 are closed. After the molten resin is solidified, the molds 11 and 21 are opened, The molded product is taken out.

Thus, the degree of engagement between the tie bar 30 and the half nut 50 determines the reliability of the injection molding machine.

In the injection molding machine, the tie bar 30 is positioned at four positions so that the upper, lower, left, and right sides of the movable die plate 20 are fitted, and the half nut 50 locks or releases the four tie bars 30.

Each half nut 50 is divided into two split nuts 51 and 52 to lock or unlock the tie bar 30. [

On the inner surfaces of the split nuts 51 and 52, teeth that can be engaged with the teeth formed on the tie bars 30 are formed.

The half nut (50) moves inward or outward with respect to the radial direction of the tie bar (30) by the half nut fastening device.

Therefore, the half nut 50 is engaged with or disengaged from the teeth formed on the tie bar 30, thereby restricting the movable die plate 20 to the locked position or unlocking the movable die plate 20 to move to the die opening position .

A conventional half-nut driving mechanism 50 typically includes a complicated device such as a hydraulic cylinder for operating the half nuts 50 consisting of two split nuts 51 and 52 separately for each of the four tie bars 30 It is common to be in the form of.

Such a configuration has a problem that the installation cost and the maintenance cost are excessively consumed.

Hereinafter, the operation of the conventional half nut 50 using a complicated device such as a hydraulic cylinder will be described.

In the case where the half nut fastening device is composed of the conventional hydraulic cylinder device 60, one split nut 51 is connected to the piston rod 61.

The other split nut 52 is connected to the cylinder 62 via the mounting plate 70 so that the split nuts 51 and 52 on both sides of the split nut 52 are connected to each other by the relative movement of the piston rod 61 and the cylinder 62 And is configured to linearly move in the opposite direction.

The construction for fastening the tie bar 30 by the hydraulic cylinder device 60 has the following disadvantages.

In other words, since each of the four tie bars 30 is required to have four fastening devices such as a hydraulic cylinder device independently, the fastening device itself or the fastening failure phenomenon is increased so that the productivity is decreased, Maintenance costs are also increased, which is uneconomical.

Prior arts have been disclosed in which the hydraulic cylinder device 60 necessary for solving the problem of tightening the tie bar 30 by the hydraulic cylinder device 60 is reduced and the half nuts are fastened at the same time.

That is, in Korean Patent Laid-Open Publication No. 2013-0068738 (hereinafter referred to as "Prior Art 1"), two half nuts are mechanically operated simultaneously by one drive source 700, connection links 600, 600a and a rotary pulley 510 And it is possible to solve the problem caused by the structure in which the tie bar 30 is fastened by the hydraulic cylinder device 60. [

Korean Patent Laid-Open Publication No. 2013-0068178 (hereinafter referred to as Prior Art 2) is similar to the prior patent 1 in that both half nuts are mechanically operated simultaneously by the drive pulley 320, the drive link and the link link structure.

Korean Patent Publication No. 1,335,215 (hereinafter referred to as Prior Art 3) is similar to the prior arts 1 and 3 in that both half nuts are mechanically operated simultaneously by the drive pulley 400, the block link and the link link structure.

The foregoing prior art patents disclose all of the disadvantages of the structure in which the tie bar 30 is fastened by the hydraulic cylinder device 60. Therefore, solving the problem of the complexity of the construction due to the adoption of the hydraulic cylinder device 60 It was possible.

However, the configuration using the link as in the prior arts 1 to 3 shows the following disadvantages.

(1) The fastening force for the tie bar of the half nut is weaker than the fastening force for fastening the tie bar by the hydraulic cylinder device.

(2) The connection structure of the split nut and the link and the hinge shaft is complicated, and in particular, in the case of using a hinge shaft for locking and releasing the synchronization of the links, there may occur a phenomenon in which the tightening of the tie bar is displaced.

(3) When increasing the thickness of the link to improve the fastening force, impact due to the inertia of the link is accompanied when fastening and releasing the half nut.

(4) Isolation and coupling of the link is not easy.

Korean Patent Publication No. 2013-0068738 Korean Patent Publication No. 2013-0068178 Korean Registered Patent No. 1,335,215

The present invention relates to a half nut fastening mechanism for an injection molding machine, and it provides a half nut fastening mechanism of an injection molding machine that assures a strong fastening force and facilitates separation between parts as well as fastening two left and right half nuts It has its purpose.

In order to solve the above problems, A first support member coupled to one end of the connection bar; And a second support member coupled to the other end of the connection bar, wherein the first support member or the second support member is coupled by the connection bar fixed power lock.

The present invention relates to a movable plate; A first half nut made up of a first split nut and a second split nut; A second half nut made of a third split nut and a fourth split nut; A fixing plate coupled to the movable plate; A driving servo motor coupled to the fixed plate; A first connection bar and a second connection bar passing through the first split nut, one end of which is coupled to the second split nut by a connection bar fixed power lock, A third connection bar and a fourth connection bar passing through the third split nut, one end of which is coupled to the fourth split nut, A first support member coupled to the first connection bar and the second connection bar; A second support member coupled to the third connection bar and the fourth connection bar; A connecting bar connecting the first supporting member and the second supporting member; The connection bar is coupled to the first and second support members by a connection bar fixed power lock, wherein the connection bar fixed power lock includes an inner ring, an outer ring, and a plurality of bolts.

In the present invention, the driving servo motor further includes a first pulley, a second pulley connected to the first pulley by a belt, A ball screw engaged with the second pulley; And one end of the ball screw is coupled with the third split nut.

The present invention further includes an upper case coupled to an upper surface of the half nut and a lower case coupled to a lower surface of the half nut and between the upper surface of the upper case and the half nut and between the lower case and the lower surface of the half nut A link plate disposed on the link plate; A first pin inserted into a slot formed at both ends of the link plate;

And a second pin inserted into a through hole formed between the elongated holes of the link plate, wherein the second pin penetrates through the upper case and the lower case and the link plate.

The half nut fastening mechanism of the injection molding machine according to the present invention has the following effects.

(1) Compared to the half nut fastening mechanism adopting the link structure, the fastening force to the tie bar is strong.

(2) Since the number of the power generating devices is reduced compared to the prior art, maintenance is easy.

(3) Since the area occupied by the half nut and the link is reduced as compared with the prior art, miniaturization of the injection molding machine can be achieved.

(4) It is economical because it is possible to utilize the conventional half nut through relatively simple design change.

(5) Since the split nuts on both sides can be simultaneously engaged with the tie bar, synchronization is easy to implement.

(6) Not only is the fastening force between components such as links improved, but also easy to separate.

1 is a perspective view according to a first preferred embodiment of the present invention;
Figure 2 is a perspective view from another direction according to a first preferred embodiment of the present invention;
3 is an exploded perspective view of a first half nut according to a first preferred embodiment of the present invention.
4 is an operational state view showing the opening of a half nut according to a first preferred embodiment of the present invention;
5 is an operational state view showing closing of a half nut according to a first preferred embodiment of the present invention;
6 is an exploded perspective view of a second half nut according to a third preferred embodiment of the present invention.
7 is an enlarged perspective view of a supporting member according to a first preferred embodiment of the present invention.
Figs. 8 and 9 are views showing the half nut fastening mechanism of the conventional injection molding machine. Fig.
10 is a perspective view of a movable plate of a preferred embodiment of the present invention;
11 is a partially enlarged perspective view of a second pulley of a preferred embodiment of the present invention;
12 is a partially enlarged perspective view of a ball screw of a preferred embodiment of the present invention.
13 is an exploded perspective view of a link plate and a case of a preferred embodiment of the present invention.
14 is an enlarged perspective view of a link plate of a preferred embodiment of the present invention.
15 is a perspective view and a cross-sectional view of a connection bar fixed power lock of a preferred embodiment of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

First, a first preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a half nut fastening apparatus according to an embodiment of the present invention.

1, a half nut fastening apparatus 100 according to an embodiment of the present invention includes a pair of first half nuts 110 and second half nuts 110 on both upper and lower sides of a movable plate 200, 120 are combined.

Since the half nut fastening device 100 is formed symmetrically to the upper and lower portions of the movable plate 200, the following description will be made with reference to the upper portion of the movable plate 200. [

First, the movable plate 200 is constructed as follows.

Approximately, the movable plate 200 is similar to a rectangular flat plate, and a half nut is coupled to each corner.

The half nuts are connected to the upper right and upper left sides based on the perspective view, and the half nuts are connected to the lower right and lower left ends.

A round portion 203 is formed on the left upper end of the movable plate 200 and a round portion 203 is formed on the lower right end diagonally opposite to the left upper end.

The upper surface of the movable plate 200 is generally flat, and half-nut coupling portions 201a, 201b, 201c and 201d are formed at the respective corners.

The half nut coupling portions 201a and 201c are located diagonally on the upper surface of the movable plate 200 and the half nut coupling portions 201b and 201d are also diagonally positioned on the upper surface of the movable plate 200. [

The half-nut coupling portions 201a and 201c protrude from the upper surface of the movable plate 200 and have a rectangular shape protruding from the side surface.

A movable plate ring 205 is formed on a side surface of the movable plate 200 on which the half nut coupling portions 201b and 201d are formed.

The approximate shape of the movable plate ring 205 is formed by one side 205a of the arc and the other side 205b is integrally connected with the side of the movable plate 200. [

And a hollow portion 206 is formed at one side 205a.

The first half nut 110 includes a first split nut 111 and a second split nut 112. The second half nut 120 includes a third split nut 113 and a fourth split nut 114, .

The drive servomotor 140 is positioned near the third split nut 121 among the first, second, third, and fourth split nuts 111, 112, 121, and 122.

Hereinafter, the position of the drive servomotor 140 will be described in detail.

First, a fixing plate 300, which will be described later, is coupled to the movable plate 200.

The fixed plate 300 includes a fixed plate driven servo motor coupling portions 310 and 320, a ball screw supporting portion 306 into which the ball screws 145 are inserted, and fixed plate supporting portions 301 and 305 for supporting and fixing the fixed plate to the movable plate 200 .

First, the fixing plate supporting portions 301 and 305 are flanges protruding in the front-rear direction of the ball screw supporting portion 306.

7, the fixing plate support portions 301 and 305 are formed so as to protrude in the forward and backward directions from the right upper end and the right lower end, respectively.

A fixed plate fixing hole 330 is formed in the fixing plate supporting portions 301 and 305 and a total of four fixing plate fixing holes 330 are formed in the preferred embodiment of the present invention.

A fixing bolt (not shown) is inserted through the fixing plate fixing hole 330, and the movable plate 200 and the fixing plate 300 are coupled by bolts.

The fixing plate first through hole 340 is formed in the ball screw supporting portion 306, which is the middle portion of the fixing plate 300.

The bearing 149 is first inserted into the fixing plate first through hole 340.

The ball screw second fixing member 148 is inserted into the fixing plate first through hole 340 in which the bearing 149 is inserted.

The fixed plate second through-hole 350 is formed respectively above and below the fixed plate first through-hole 340.

The size of the fixing plate second through-hole 350 is smaller than that of the fixing plate first through-hole 340.

The fixed plate driven servo motor engaging portions 310 and 320 are protruded from one side of the ball screw supporting portion 306 into which the ball screw 145 is inserted.

The fixed plate driven servo motor engaging portions 310 and 320 are thicker than the ball screw supporting portion 306.

The fixed plate driven servo motor coupling portions 310 and 320 are formed on the upper and lower portions of one side of the ball screw supporting portion 306, respectively.

The fixed plate driven servo motor coupling holes 311, 312, 313 and 314 are formed in the fixed plate driven servo motor coupling portions 310 and 320.

The fixed plate driven servo motor coupling holes 311 and 312 are formed in the fixed plate driven servo motor coupling portion 310 formed on the upper side of one side of the ball screw supporting portion 306.

The fixed plate driven servo motor coupling holes 313 and 314 are formed in the fixed plate driven servo motor coupling portion 320 formed at a lower portion of one side of the ball screw supporting portion 306. [

The shape of the fixed plate driven servo motor coupling holes 311, 312, 313, and 314 has a shape of a slot instead of a circular shape.

When the fixed plate driven servomotor coupling holes 311, 312, 313, and 314 are formed as slots, the coupling position of the driving servo motor 140 with respect to the fixed plate 300 can be adjusted through the slot.

The driving servo motor 140 is brought into contact with the front surfaces 310a and 320a of the coupling portion of the fixed plate driving servo motor to be coupled to the driving servo motor support portion 140a to be described later.

The body of the drive servo motor 140 is supported on the fixed plate 300 by the drive servo motor support portion 140a.

The driving servomotor support portion 140a has a roughly "C" shaped cross section and includes a side surface protrusion 140b formed at the upper and lower ends of the flat plate and the flat plate, respectively.

A reinforcing member 140c may be coupled to one side of the side projection 140b by screws or bolts.

The drive servo motor 140 can be supported on the fixed plate 300 by screws or bolts inserted into the fixed plate driven servo motor coupling holes 311, 312, 313 and 314 toward the side projecting portions 140b.

Hereinafter, how the second half nut 110 is fastened to and unfastened from the tie bar 150 by the driving servo motor 140 coupled to the fixing plate 300 will be described.

The drive servo motor 140 includes a drive servo motor shaft 141.

The driving servo motor shaft 141 is coupled to the first pulley 142.

A second pulley 143 is located away from the first pulley 142 in the direction of the movable plate 200.

A belt 144 is connected to the first pulley 142 and the second pulley 143.

Hereinafter, the connection between the ball screw 145 and the third split nut 113 will be described.

The ball screw 145 is inserted into the ball screw 145 through one end of the third split nut 113 and the other end through the fixing plate 300.

That is, the other end of the ball screw 145 passes through the fixing plate 300.

The other end of the ball screw 145 passing through the fixing plate 300 is inserted into the center of the first pulley 143.

One end of the ball screw 145 is coupled to the third split nut 113.

That is, the first ball screw fastener 146 is fixed to the side of the third split nut 113.

More specifically, one end of the ball screw 145 is inserted into the first fastener 146 of the ball screw and the first fastener 146 of the ball screw is coupled to the side of the third split nut 113.

The ball screw first fixture 146 is coupled to the side of the third split nut 113 by screws or bolts.

One end of the ball screw 145 is inserted into the ball screw first fixing hollow portion 147 and the ball screw 145 receives the rotational force of the drive servo motor 140 to move the ball screw first fixing hollow portion 147 forward and rearward Direction.

The ball screw 145 may be inserted into the side groove 113a of the third split nut 113 formed on the side of the third split nut 113 according to the operation of the drive servo motor 140. [

On the other hand, since the ball screw 145 passes through the fixing plate first through hole 340 and is inserted and fixed to the center of the first pulley 143, the rotational force of the driving servo motor 140 is transmitted to the ball screw 145 .

The ball screw second fixture 148 is inserted into the fixing plate first through hole 340 and inserted into the bearing 149 behind the inserted second ball screw fixture 148.

Accordingly, the other end of the ball screw 145, more specifically, the ball screw 145, is passed through the bearing 149 and the ball screw second fixture 148 in order.

Finally, the other end of the ball screw 145 is inserted into and engaged with the second pulley 143.

Since one end of the ball screw 145 is screwed to the ball screw first fixture 146 as described above, the rotational force of the drive servo motor 140 is transmitted through the ball screw 145 to the third split nut 113 It pushes.

At this time, the third split nut 113 is guided by the third connecting bar 230 and the fourth connecting bar 240 and moves to the sliding bar tie bar 150.

Meanwhile, the third connection bar 230 and the fourth connection bar 240 are formed to penetrate the second half nut 120.

One end of the third connecting bar 230 and one end of the fourth connecting bar 240 are coupled to the fourth dividing nut 114 by bolts or the like and the third connecting bar 230 and the fourth connecting bar 240 are connected to the third The split nut 113 is formed so as to pass therethrough.

The third connection bar 230 and the fourth connection bar 240 serve to guide the third split nut 113 and the fourth split nut 114 to move according to the operation of the drive servo motor 140. [

The first half nut 110 is formed with a first connecting bar 210 and a second connecting bar 220 so as to pass through the first half nut 110 in the same manner as the second half nut 120 described above.

One end of the first connecting bar 210 and one end of the second connecting bar 220 pass through the first split nut 111 and the first connecting bar 210 and the second connecting bar 220 pass through the fixed power lock 115 ).

The electrically driven servo motor 140 is consequently engaged with the operation of the fourth split nut 114 by being coupled to the third split nut 113.

As described above, the third connection bar 230 and the fourth connection bar 240 pass through the third split nut 113.

As described above, the third connecting bar 230 and the fourth connecting bar 240 are combined with the fourth split nut 114, which is the other split nut, to be interlocked with each other.

An upper case 250 and a lower case 260, which are fixed to the movable plate 200, are installed on upper and lower portions of the half nuts 110 and 120, respectively.

The upper case 250 and the lower case 260 serve to guide movement of the split nuts 111, 112, 113, and 114 constituting the half nuts 110 and 120.

The upper case 250 and the lower case 260 are coupled to the movable plate 200 by bolts or the like.

In the present invention, when the tie bar 150 is engaged, when the drive servo motor 140 is operated, the drive servo motor shaft 141 rotates.

Since the driving servo motor shaft 141 is connected to the first pulley 142, the first pulley 142 rotates.

A belt 144 is connected to the rotating first pulley 142 and the belt 144 is connected to the second pulley 143.

The ball screw 145 is protruded from the third split nut 113 toward the fixed plate 300 as described above.

That is, one end of the ball screw 145 is coupled to the third split nut 113.

The rotational force of the drive servo motor 140 is transmitted to the ball screw 145 because the ball screw 145 passes through the first plate through hole 340 and is inserted and fixed to the center of the first pulley 143.

The rotational force of the drive servomotor 140 pushes the third split nut 113 by the ball screw 145.

At this time, the third split nut 113 is guided by the third connecting bar 230 and the fourth connecting bar 240 and moves to the sliding bar tie bar 150.

The fourth split nut 114 is pulled by the operation of the link plates 280 attached to the upper and lower parts of the third split nut 113 and the fourth split nut 114 to be contacted with the tie bar 150 So that the tightening operation is completed.

The first half nut 110 can be fastened to the tie bar 150 by the drive servomotor 140 driving the third split nut 113. [

This will be described in detail below.

The other end of the third connecting bar 230 and the fourth connecting bar 240 is coupled to the second supporting member 400.

A through hole 405 is formed at the center of the second support member 400 when viewed from the front, and the approximate shape is a rectangle with a protruding center.

About 2/3 of the total length of the second support member 400 is formed to be thicker than both ends of the second support member 400 with respect to the center when viewed from the side.

The connection bar 500 is coupled to the through hole 405 of the second support member.

That is, the connection bar fixed power lock 510 is inserted into the through hole 405 of the second support member.

The second support member 400 is coupled to the other end 500a of the connection bar 500 and the first support member 450 is coupled to the one end 500b of the connection bar 500. [

Hereinafter, the connection bar fixed power lock 510 will be described.

The connection bar fixed power lock 510 includes an inner ring 545 and an outer ring 530 and a plurality of bolts 540 disposed between the inner ring 545 and the outer ring 530.

When the connecting bar power lock 510 is viewed from above, the bolt 540 is provided in a circumferential direction with a predetermined gap between the inner ring 545 and the outer ring 530.

The connecting bar fixed power lock 510 will be described with reference to FIG.

A taper is formed between the inner ring 545 and the outer ring 530 as shown in Fig.

When the bolt 540 is tightened, the inner ring 545 comes up and gives a strong fastening force toward the connecting bar 500.

A connecting bar fixed power lock through hole 550 is formed at the center of the connecting bar fixed power lock 510.

The connection bar 500 is inserted into the connection bar fixed power lock through hole 550.

The connection bar fixing power lock 510 is inserted into the through hole 405 of the second support member and the connection bar 500 is inserted into the connection bar fixing power lock through hole 550 as described above.

Accordingly, when the plurality of bolts 540 installed on the connecting bar fixed power lock 510 are tightened, the connecting bar 500 is firmly coupled to the connecting bar fixed power lock 510.

Since the first support member 450 provided on the opposite side of the second support member 400 has the same configuration and shape as the second support member 400, a description thereof will be omitted.

One end of the first connection bar 210 and the second connection bar 210 are coupled to the fourth split nut 114.

The other end of the first connection bar 210 and the second connection bar 210 is coupled to the first support member 450.

The other end of the first connecting bar 210 and the second connecting bar 210 and the first supporting member 450 are connected to each other at the other end of the third connecting bar 230 and the fourth connecting bar 240, The description with respect to the coupling with the support member 400 will be omitted.

The first support member 450 is connected to the second support member 400 by the connection bar 500 to be interlocked.

The force for pushing the third split nut 113 by the third connecting bar 230 and the fourth connecting bar 240 by the operation of the driving servo motor 140 is transmitted to the first supporting member 130 interlocked by the connecting bar 500, (450).

Therefore, the second split nut 112 also approaches the tie bar 150.

At this time, the first split nut 111 is pulled by the operation of the second split nut 112 and the link plate 280 attached to the upper part of the first split nut 111, So that the tightening operation is completed.

The fastening operation of the second half nut 120 and the fastening operation of the first half nut 110 are separately described in the preferred embodiment of the present invention. However, in the fastening operation of the second half nut 120 and the fastening operation of the first half nut 110, (110) are performed almost simultaneously.

According to the present invention, the first supporting member 450, the second supporting member 400, and the connecting bar 500 connecting the first supporting member 450 and the second supporting member 400 The half nuts 110 and 120 can securely achieve the synchronous engagement with the tie bars 150 by only one driving servo motor.

The upper case 250 is coupled to the upper surfaces of the half nuts 110 and 120.

The lower case 260 is coupled to the lower surfaces of the half nuts 110 and 120.

Hereinafter, the shape of the upper case 250 will be described.

The upper case 250 has a first hollow portion 251 having a rectangular shape and a second hollow portion 252 having a rectangular shape, and has a rectangular shape as a whole.

That is, it is a rectangular shape having a shape having two rectangular hollow portions.

Referring to the upper case 250 shown in FIG. 6, a first hollow portion and a second hollow portion 253 are formed between the first hollow portion 251 and the second hollow portion 252.

The first hollow portion and the second hollow portion 253 are formed with a through hole 254a through which a second pin 255 to be described later is inserted.

The upper case first side 256 is connected to the upper portion of the first hollow portion and the second hollow portion 253.

The upper case second side surface 257 is connected to a lower portion of the first hollow portion and the second hollow portion 253.

The upper case first side 256 is formed to be higher than the upper case second side 257.

A through hole 258 for coupling with the movable plate 200 is formed on the upper case first side 256 and four through holes 258 are formed in the preferred embodiment of the present invention.

The upper case second side 257 is formed to be lower in height than the upper case first side 256.

The upper surface of the upper case first side surface 256 is flat, whereas the upper case second side surface 257 is formed with a total of three convex portions on the upper surface.

That is, the first convex portion 257a on the second case upper side and the second convex portion 257c on the second case side of the upper case are formed at both ends of the upper case second side 257.

A third convex portion 257b of the upper case second side surface 257 is formed in the middle of the upper case second side surface 257 and positioned to contact the first hollow portion and the second hollow connection portion 253.

A link plate 280 is positioned between the upper case 250 and the upper surface of the half nut 110.

The approximate shape of the link plate 280 is elliptical.

When the link plate 280 is viewed from above, two long holes 285 are formed at both ends of the link plate 280.

The shape of the slot 285 is as follows.

Two arc portions 285a are formed at both ends 285 of the long hole and a straight portion 285b connecting the two arc portions 285a is formed.

The circular arc portion 285a adjacent to the through hole 254b of the two circular arc portions 285a is formed with a groove 286 toward the through hole 254b.

A through hole 254b is formed between the two long holes 285.

The groove 286 is formed to connect the through hole 254b and the two long holes 285 to each other.

The first pin 281 is inserted into the long hole 285.

As described above, a through hole 254b is formed between the two long holes 285 of the link plate.

On the other hand, a through hole 254a is also formed in the first hollow portion and the second hollow portion 253.

The second pin 255 is inserted to pass through hole 254a and through hole 254b, respectively.

Therefore, the second pin 255 is inserted through the upper case 250 and the link plate 280, respectively.

A first pin 281 is inserted into two elongated holes 285 formed at both ends of the link plate 280 and the first pin 281 is inserted into the third split nut 113 and the fourth split nut 114 (Not shown) formed therein.

The movement of the link plate 280 is performed as follows.

The link plate 280 can be fixed to the upper case 250 by the second pin 255.

The first pin 281 is inserted into the long hole 285.

The first pin 281 is fitted and fixed to a hole (not shown) formed in the third split nut 113 and the fourth split nut 114.

The rotation of the link plate 280 is centered on the second pin 255 and the third split nut 113 and the fourth split nut 114 are rotated by the first pin 281 inserted in the long hole 285, Can be distant from or close to each other.

That is, the first pin 281 is located in the arc portion 285a of the elongated hole.

When the second pin (255) is rotated, the first pin (281) is moved to the arc portion (285a) of the elongated hole through the linear portion (285b) of the elongated hole.

The rotary motion of the second pin 255 is converted into a rectilinear motion by the long hole 285.

The upper case second side surface 257 is formed with an upper case fixing groove 287.

The upper case fixing groove 287 is located on the rear surface of the upper case second side surface 257 and the rear surface of the upper case second side surface 257 is concave toward the first hollow portion and the second hollow connection portion 253 And has a recessed shape.

As described above, the upper case 250 and the lower case 260 serve to limit the movement of the split nuts 111, 112, 113, and 114 constituting the half nuts 110 and 120.

The second pin 255 serves to serve as a center of rotation of the link plate 280 and to securely fix the link plate 280 to the upper case 250.

The lower case 260 is coupled to the lower surfaces of the half nuts 110 and 120.

Unlike the upper case 250, the lower case 260 is not provided with a hollow portion.

The overall shape of the lower case 260 also has a rectangular shape similar to that of the upper case 250.

The upper surface of the lower case first side surface 266 is flat, while the lower case second side surface 267 is formed with a total of three convex portions on the upper surface.

The lower case first side 266 is formed higher than the lower case second side 267.

A through hole 268 for coupling with the movable plate 200 is formed on the lower case first side 266 and four through holes 268 are formed in the preferred embodiment of the present invention.

The lower case second side 267 is formed to be lower in height than the lower case first side 266.

The bottom surface of the lower case first side surface 266 is flat whereas the bottom surface of the lower case second side surface 267 is formed with a total of three convex portions.

That is, the first convex portion 267a of the lower case second side and the second convex portion 267c of the second case second side are protruded from both ends of the lower case second side 267.

And a third convex portion 267b on the second case side of the lower case is formed in the middle of the lower case second side 267. [

The upper surface of the lower case 260 is flat and a through hole 264 through which the second pin 255 is inserted for rotation of the link plate 280 is formed at the center.

A lower case fixing groove 288 is formed in the lower case first side 266.

The lower case fixing groove 288 is located on the rear surface of the lower case first side 266 and the rear surface of the lower case second side 266 is concave toward the third convex portion 267b on the second case second side And has a recessed shape.

The case fixing member 290 is engaged with the upper case fixing groove 287 and the lower case fixing groove 288, respectively.

The case fixing member 290 coupled to the upper case fixing groove 287 and the lower case fixing groove 288 has the same shape and will be described below with reference to the case fixing member 290 engaged with the upper case fixing groove 287 Explain.

The overall shape of the case fixing member 290 is similar to a rectangular column.

The case fixing member 290 is formed with two holes through which screws or bolts are inserted.

The inserted screw or bolt is inserted into and engaged with a screw hole (not shown) or a bolt hole (not shown) formed in the upper case fixing groove 287.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. It goes without saying that such changes are within the scope of the claims.

The half nut fastening mechanism of the injection molding machine according to the present invention can fasten two left and right half nuts at the same time by a simple structure, and the connection structure of the half nut and the link is simple, and maintenance is easy.

100: half nut fastening device 110: first half nut
120: second half nut 111: first split nut
112: second split nut 113: third split nut
114: fourth split nut 115: fixed power lock
140: Driving servo motor 141: Driving servo motor shaft
142: first pulley 143: second pulley
144: Belt 145: Ball Screw
150: tie bar 200: movable plate
210: first connection bar 220: second connection bar
230: third connecting bar 240: fourth connecting bar
250: upper case 251: first hollow portion
252: second hollow portion 253: first hollow portion and second hollow connection portion
254: Through hole 255: Second pin
260: lower case 280: link plate
281: first pin 285: long hole
300: fixing plate 330: fixing plate fixing hole
340: fixed plate first through hole 350: fixed plate second through hole
400: second support member 405: through hole
450: first supporting member 500: connecting bar
510: Connection bar fixing power lock 520: Connection bar fixing power lock inner
530: outer ring 540: bolt
545: Inner ring

Claims (4)

Connection bar;
A first support member coupled to one end of the connection bar;
And a second support member coupled to the other end of the connection bar,
Wherein the first supporting member or the second supporting member has a connecting bar
Wherein the fastening bolts are coupled by a connecting bar fixed power lock. Movable plates;
A first half nut made up of a first split nut and a second split nut;
A second half nut made of a third split nut and a fourth split nut;
A fixing plate coupled to the movable plate;
A driving servo motor coupled to the fixed plate;
A first connection bar and a second connection bar passing through the second split nut, one end of which is coupled to the first split nut,
A third connection bar and a fourth connection bar passing through the third split nut, one end of which is coupled to the fourth split nut,
A first support member coupled to the first connection bar and the second connection bar;
A second support member coupled to the third connection bar and the fourth connection bar;
A connecting bar connecting the first supporting member and the second supporting member;
Wherein the connection bar is coupled to the first and second support members by a connection bar fixed power lock,
Wherein the connection bar fixed power lock comprises an inner ring, an outer ring, and a plurality of bolts. The method of claim 2,
The driving cylinder further includes a first pulley,
A second pulley connected to the first pulley by a belt;
A ball screw engaged with the second pulley;
Wherein one end of the rod engages with a third split nut. ≪ RTI ID = 0.0 > The method according to claim 2 or 3,
An upper case coupled to an upper surface of the half nut, and a lower case coupled to a lower surface of the half nut,
Between the upper case and the upper surface of the half nut
A link plate positioned between the lower case and the lower surface of the half nut;
A first pin inserted into a slot formed at both ends of the link plate;
And a second pin inserted into the through hole formed between the elongated holes of the link plate,
And the second pin is coupled through the upper case and the lower case and the link plate
The half nut fastening mechanism of the injection molding machine

Images