KR920001816Y1 - Molding Unit of Injection Molding Machine - Google Patents

Abstract

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Description

Molding Unit of Injection Molding Machine

1 is a plan view of a mold unit of the injection molding machine of the present invention.

FIG. 2 is a front view of the tie bar support plate shown in line I-I of FIG.

3 is a front view of the locking plate shown in the line II-II of FIG.

4 is a cross-sectional view of the locking plate and moving plate of line III-III of FIG.

* Explanation of symbols for main parts of the drawings

10: tie bar support plate 11: fixed plate

12, 13, 14, 15: tie bar 16: driving cylinder

17: piston rod 18: locking plate

19, 20, 21, 22: circular hole 23, 24, 25, 26: stopper

27, 28, 29, 30: square main part 31, 32, 33, 34: pin

35: center axis 36: cross link

41, 42, 43, 44: guide groove 45: stopper driving cylinder

46: piston rod 47: moving plate

48: guide bush 49: piston

50: Bore 51: Oil Seal

52: hydraulic chamber 53: ejecting plate

54: eject bar 55: spring support rod

56: main part 57: spring

58: stopper support plate 59: key groove

60: key protrusion

The present invention relates to an injection molding machine, and more particularly to a mold unit for moving a moving plate relative to a fixed plate.

In the conventional direct pressure mold unit, the structure of the mold unit is complicated for the smooth running of the mold piston and the smooth operation when the mold pressure is generated due to the enlargement of the mold cylinder, and a large amount of energy was consumed due to the large flow rate treatment. In addition, in the conventional toggle type clamping unit, it is difficult to change the clamping force and there is a disadvantage that the toggle unit must be moved according to the mold.

It is an object of the present invention to provide a molding unit of an injection molding machine using a tie bar locking unit in order to eliminate the disadvantages of the conventional molding unit as described above.

1 is a plan view of the mold unit of the injection molding machine of the present invention, wherein the tie bar support plate 10 is vertically fixed on the base of the injection molding machine and fixed to a position facing the tie bar support plate 10. The plate 11 is fixed vertically. Four tie bars 12, 13, 14, and 15 are supported at the four corners of the tie bar support plate 10 and at the four corners of the fixed plate 11. (See Figure 2).

The travel cylinder 16 is fastened to the center of the tie bar support plate 10, and the piston rod 17 of the travel cylinder 16 is connected to the center of the locking plate 18. The locking plate 18 is shown in front view in FIG. 3, where the locking plate 18 has the shape of a square plate, and rounded corners 19, 20, 21, 22 are formed in the four corners of each tie bar. (12, 13, 14, 15) passes through it. Further, rectangular recesses 27, 28, 29, through which stoppers 23, 24, 25, and 26 are movably guided around the circular holes 19, 20, 21, 22 in the four corners of the locking plate 18, respectively. 30) is formed. Rectangular recesses 27, 28, 29, and 30 are formed to which each stopper 23, 24, 25, 26 is movably guided. Each stopper 23, 24, 25, 26 has pins 31, 32, 33, 34, respectively, which pins 31, 32, 33, 34 have a central axis 35 of the locking plate 18. Is inserted into the guide grooves 41, 42, 43, 44 of the ends 37, 38, 39, 40 of the rotatable cross-link 36. The cross link 36 is connected to the piston rod 46 of the stopper traveling cylinder 45 fixed to the locking plate 18 and operated about the central shaft 35.

4 is a cross-sectional view of the locking plate 18 and the moving plate 47 of the present invention, the moving plate 47 is not shown when guided to the tie bar 12 through the guide bush 48, but the rest is not shown. The same is guided by the tie bars 13, 14, 15. The piston part 49 protrudes in the left center of the moving plate 47, and the piston part 49 is guided in the bore 50 formed in the right center of the locking plate 18, and is sealed by the oil seal 51. As shown in FIG. The hydraulic chamber 52 is installed inside the piston 49, and the ejecting plate 53 and the eject bar 54 are built in the hydraulic chamber 52. In addition, a spring support rod 55 is spirally connected to the movable plate 47 through the hole 63 of the recessed portion 56 around the bore 50 of the locking plate 18, and the spring support rod 55 Is biased by return spring 57 in recess 56.

On the other hand, it is shown that the stopper 23 located in the rectangular recess 27 located at the corner of the locking plate 18 is supported so as not to be separated from the rectangular recess 27 by the stopper plate 58, the stopper 23 Is shown having a plurality of key protrusions 60 engaged with a plurality of key grooves 59 formed perpendicular to the longitudinal axis of the tie bar 12.

Referring to the operation of the mold unit of the injection molding machine of the present invention is as follows.

Referring to FIG. 1, when oil is supplied to the A port of the driving cylinder 16, the piston rod 17 moves the locking plate 18 and the moving plate 47 toward the fixed plate 11. At this time, the cross link 36 of the locking plate 18 is not in engagement with the tie bars 12, 13, 14, 15 in the position shown in FIG. .

When the mold 61 attached to the movable plate 47 and the mold 62 attached to the fixed plate 11 are closed, the stopper travel cylinder 45 is operated so that the cross link 36 is centered on the central axis 35. And the key protrusion 60 of each stopper 23, 24, 25, 26 is engaged with the key groove 29 of each tie bar 12, 13, 14, 15 to complete the locking.

After locking is completed, oil is supplied to the C port of the bore 50 shown in FIG. 4 so that a predetermined clamping force acts on the mold. At this time, the tie bars 12, 13, 14, 15 are tensioned and the moving plate 47 is moved by a small amount by the amount of tension of the tie bars.

When the injection process is completed, the port C of the bore 50 is opened so that the movable plate 47 moves toward the locking plate 18 by the amount of elastic recovery of the tie bars 12, 13, 14, and 15, which is a spring. This is because the support rod 55 is biased by the return spring 57.

Next, the cross-link 36 of the locking plate 18 is rotated by the operation of the stopper traveling cylinder 45 so that the respective stoppers 23, 24, 25, and 26 have respective tie bars 12, 13, 14, 15. Is disengaged from). Thereafter, when the oil is supplied to the B port of the driving cylinder 47 to return the locking plate 18 and the moving plate 47, the mold is opened. The molding unit of the injection molding machine of the present invention can be seen to repeat the above operation.

The molding unit of the injection molding machine of the present invention configured as described above has a simpler structure than a conventional toggle type or direct pressure type molding unit using a tie bar locking unit, and saves energy without requiring a large flow rate treatment such as a direct pressure type. It is possible to reduce the size of the sensor.

Claims (1)

A tie bar support plate 10 fixed vertically on the base of the injection molding machine, to which the traveling cylinder 16 having the piston rod 17 is fastened; A process plate 11 fixed vertically on the base of the injection molding machine in a position facing the tie bar support plate 10; Tie bars (12, 13, 14, 15) having the four corners of the tie bar support plate (10) and the key grooves (59) formed on the four corners of the process plate (11) and formed perpendicular to the longitudinal axis thereof; Circular holes 19, 20, 21, and 22 are formed in the corners thereof, and the tie bars 12, 13, 14, and 15 pass therethrough, and a quadrangle around the circular holes 19, 20, 21, and 22. The recesses 27, 28, 29, and 30 are formed, and a bore 50 is formed at the right center thereof, and a recess 56 having a hole 57 is formed around the bore 50. Locking plate 18; Of the tie bars 12, 13, 14, and 15 are movably guided into the rectangular recesses 27, 28, 29, and 30 of the locking plate 18, respectively; A stopper (23, 24, 25, 26) having a key protrusion (60) engageable with the key groove (59); Guide grooves 41, 42, 43, 44 into which the pins 31, 32, 33, 34 of the stoppers 23, 24, 25, 26 are respectively inserted at the end portions 37, 38, 39, 40. A cross link 36 connected to the piston rod 46 of the stopper traveling cylinder 45 and rotatably operated about the central axis 35 of the locking plate 18; Guided to the tie bars (12, 13, 14, 15) through the guide bush 48 and guided in the bore 50 of the locking plate 18 is sealed by the oil seal 51 and ejected therein A moving plate 47 having a piston portion 49 having a hydraulic chamber 52 having a plate 53 and an eject bar 54 at the center of the left side thereof; A molding unit of an injection molding machine, comprising a spring support rod (55) spirally connected to the movable plate through a hole (63) to be biased against a return spring (55) in a recess (56) of the locking plate (18).