JP3016908B2 - Cradle for mold change of injection molding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold exchange pedestal of an injection molding machine for guiding a mold when exchanging the mold in the injection molding machine.

[0002]

2. Description of the Related Art Conventionally, a resin heated and melted in a heating cylinder is injected into a mold at a high pressure, cooled and solidified or hardened therein, and then the mold is opened to take out a molded product. In an injection molding machine, a movable mold is attached to a movable platen, and a fixed mold is attached to a fixed platen. Each of the two dies has a cavity filled with a molten resin. By changing the shape of the cavity, different molded products can be molded.

In order to attach a heavy mold to the fixed platen and the movable platen, guide rollers are provided below both platens, and the mold held by the mold lifter is placed on the guide rollers. As a result, it can be attached to both platens. FIG. 2 is a sectional view of a conventional injection molding machine,
FIG. 3 is a side view of a conventional injection molding machine.

In FIG. 1, reference numeral 1 denotes a safety door provided to surround an outer periphery of a mold clamping device of an injection molding machine. A movable platen 2 and a fixed platen 4 are provided inside the safety door 1. The movable platen 2 is supported by an actuator (not shown) so as to move right and left along the tie bar 5. When the movable platen 2 moves in the direction of the fixed platen 4, the mold closing and the mold clamping move in the opposite direction. An opening is performed. Therefore, the movable mold is attached to the movable platen 2 and the fixed mold is attached to the fixed platen 4.
The two molds come and go.

[0005] Reference numeral 7 denotes a frame for supporting the injection molding machine, in which a box for accommodating molded articles falling when both dies are released and a chute for guiding the molded articles are provided inside. Reference numeral 8 denotes a frame cover. Also, 10,1
Reference numeral 1 denotes a mold exchange guide member for supporting the lower part of the mold when exchanging the mold and for guiding the mold between the operation side of the injection molding machine and the mounting position of the mold. Guide rollers 13 are rotatably disposed on the mold exchange guide members 10 and 11. The uppermost part of the guide roller 13 is positioned so as to be slightly higher than the uppermost parts of the two lower tie bars 5.

In the injection molding machine having the above structure, when the mold is replaced by using the mold lifter, the mold mounted on the mold lifter is brought sufficiently close to the platens 2 and 4 and The dies are delivered by placing the dies on the dies.

[0007]

However, in the above-described conventional injection molding machine, the operation side of the frame 7 is
Since the frame cover 8 is provided, the frame cover 8 hinders, and the mold lifter cannot be brought sufficiently close to the injection molding machine. If there is a distance between the mold lifter and the guide roller 13, the mold may drop when the mold is delivered.

Further, even if a receiving stand for temporarily supporting the mold is provided only when the mold is replaced, not only the lateral width of the injection molding machine becomes large, but also a guide roller is attached to the receiving stand. Costs rise, such as the need to do so. The present invention solves the above-mentioned problems of the conventional injection molding machine, and, when exchanging a mold, mediates a mold lifter and a guide roller to make the exchanging operation safe and increase the cost. An object of the present invention is to provide a mold exchanging pedestal for an injection molding machine.

[0009]

For this purpose, in the mold replacement pedestal of the injection molding machine according to the present invention, the movable platen is moved along the tie bar and is freely movable toward and away from the fixed platen. A molded product is obtained by filling a molten resin into a cavity in a mold fixed to a platen.

[0010] In order to replace the dies attached to both platens, a guide roller for guiding the dies is provided below the both platens. Further, a bracket is provided on a frame for supporting the injection device and the mold clamping device of the injection molding machine, extending from a position corresponding to the guide roller to the side of the injection molding machine. A mold exchange pedestal is fixed to the cradle.

The mold exchanging pedestal includes a fixed pedestal fixed to the bracket, a movable pedestal provided rotatably via a shaft with respect to the fixed pedestal, And a liner with a low coefficient of friction disposed on the table.

[0012]

According to the present invention, as described above, the movable platen is moved along the tie bar so as to be able to contact and separate from the fixed platen, and the molten resin is injected into the cavity in the mold fixed to both platens. A molded article is obtained by filling. In order to replace the dies attached to both platens, a guide roller for guiding the dies is provided below the both platens, and the dies are moved between the die lifter and the guide rollers. Is to be delivered. A bracket is provided on a frame for supporting the injection device and the mold clamping device of the injection molding machine, extending from a position corresponding to the guide roller to the side of the injection molding machine. A mold exchange pedestal is fixed to the cradle.

The mold exchange pedestal includes a fixed pedestal fixed to the bracket, a movable pedestal rotatably provided on the fixed pedestal via a shaft, and a double pedestal. And a liner with a low coefficient of friction disposed on the table. Therefore, when the movable-side pedestal is turned and folded when the mold is not replaced, the pedestal for mold replacement fits within the width of the injection molding machine. Further, when the mold is replaced, the movable pedestal is rotated and placed in a position aligned with the fixed pedestal in a straight line, and the mold is received between the mold lifter and the guide roller. Can be.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view of an extended state of a mold replacement pedestal of the injection molding machine of the present invention, and FIG. In the drawing, reference numeral 1 denotes a safety door provided so as to surround the outer periphery of a mold clamping device of an injection molding machine. A movable platen and a fixed platen (not shown) are provided inside the safety door 1, and a movable platen is provided on the movable platen. The fixed molds are attached to the fixed platens, respectively. Reference numeral 7 denotes a frame for supporting the injection device and the mold clamping device, in which a box for accommodating molded articles falling when the two dies are released, and a chute for guiding the molded articles are provided inside. 8 is the frame 7
3 is a frame cover disposed on the operation side of FIG.

A mold exchange guide 10 supports the lower part of the mold when exchanging the mold, and guides the mold between the operation side of the injection molding machine and the mounting position of the mold. A guide roller 13 is rotatably disposed on the mold exchanging guide member 10. A bracket 22 extending on the operation side of the injection molding machine is provided on the seat 21 of the frame 7, and a foldable mold exchange receiving base 24 is fixed to the bracket 22. The mold exchange pedestal 24 is disposed on the operation side of the injection molding machine and on an extension of the mold exchange guide member 10 of the fixed platen for the convenience of exchanging the mold of the fixed platen. . When the mold of the movable platen is replaced, the movable platen is moved to the fixed platen side so that the mold replacement guide member 10 of the movable platen can correspond to the mold replacement pedestal 24. .

The mold exchange pedestal 24 includes a fixed pedestal 25 fixed to the bracket 22 and a movable pedestal supported by the fixed pedestal 25 via a shaft 27 so as to be pivotable. Consists of 28. With the above configuration, the movable-side receiving base 28 can be turned through the shaft 27 and folded at the position indicated by the two-dot chain line except when the mold is replaced, so that the lateral width of the injection molding machine does not increase. I have to.

When the fixed support 25 and the movable support 28 are extended, resin liners 31, 32 having a small coefficient of friction are attached to the upper portions thereof, respectively. The mold is made to slide on the surface of the mold 32. As described above, the mold exchanging pedestal 24 does not use a roller, and has an inexpensive structure. The shaft 27 is connected to the liners 31, 32 as shown in FIG.
And the movable pedestal 28 can move along the shaft 27 in the direction of the arrow shown in the figure. Reference numeral 34 denotes the movable receiving stand 28.
Is a stopper that restricts unnecessary turning of the movable-side receiving stand 28 when is folded and placed at the position indicated by the two-dot chain line.

FIG. 5 is a view showing the arrangement of the stoppers. In the figure, reference numeral 34 denotes a stopper, which is attached to the tip of the shaft 27 and extends downward in an “L” shape to form a locking portion 35. The locking portion 35 is provided on the movable receiving table 2.
When the folding unit 8 is folded, it comes into contact with the liner 32 and regulates the movable receiving stand 28 so as not to turn any more.

Next, the operation of the mold exchanging pedestal of the injection molding machine of the present invention will be described with reference to FIGS. 6 and 7. FIG. 6 is a view showing the movement of the mold replacement pedestal of the injection molding machine of the present invention, and FIG. In FIG. 6, reference numeral 25 denotes a fixed-side support, 2
Reference numeral 8 denotes a movable pedestal movable along the shaft 27. The movable pedestal 28 is moved from the position shown in FIG. In this state, the movable receiving stand 28 can be turned around the shaft 27 and folded as shown in FIG.

When the mold is replaced, the projection 28a formed on the portion of the movable receiving stand 28 close to the shaft 27 is replaced with the fixed receiving stand formed at a position corresponding to the projection 28a. The projection 25a formed on a portion of the fixed base 25 near the shaft 27 is engaged with the movable base 28 formed at a position corresponding to the projection 25a. The fixed-side pedestal 25 and the movable-side pedestal 28 are mutually supported. At this time, the liners 31, 32 on the fixed-side pedestal 25 and the movable-side pedestal 28 are aligned on a straight line as shown in FIG. 1 to form a guide surface for moving the mold.

In this manner, the mold exchanging cradle 24 extends between the mold lifter and the mold exchanging guide member 10, so that the mold can be easily attached to the platens 2, 4. In the above embodiment, the mold exchange is performed from the operation side, but it is also possible to perform the mold exchange from the non-operation side.

The present invention is not limited to the above embodiment, but can be variously modified based on the gist of the present invention, and they are not excluded from the scope of the present invention. For example, in the above embodiment, the case of exchanging the mold of the injection molding machine has been described. However, the present invention can be applied to a transport device that requires an intermediary mechanism and cannot take up an installation space. it can.

[0023]

As described in detail above, in order to replace the dies mounted on both platens, guide rollers for guiding the dies are provided below the both platens. The transfer of the mold is performed between the mold lifter and the guide roller. A bracket is provided on a frame for supporting the injection device and the mold clamping device of the injection molding machine, extending from a position corresponding to the guide roller to the side of the injection molding machine. The mold replacement pedestal is fixed to the
A fixed-side pedestal fixed to the bracket, a movable-side pedestal provided rotatably via a shaft with respect to the fixed-side pedestal, and a small friction coefficient disposed on both pedestals. Consists of a liner.

In the case of exchanging the mold, if the movable pedestal is turned and placed in a position in line with the fixed pedestal, the mold can be received between the mold lifter and the guide roller. it can. Therefore, the work of replacing the mold is facilitated. Further, when the movable side pedestal is swiveled and folded when the mold is not replaced, the mold replacement pedestal can be accommodated within the width of the injection molding machine, so that the space for the injection molding machine is increased. There is no.

Since there is no need to mount a guide roller on the movable pedestal and the fixed pedestal, the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of an extended state of a mold replacement pedestal of an injection molding machine of the present invention.

FIG. 2 is a sectional view of a conventional injection molding machine.

FIG. 3 is a side view of a conventional injection molding machine.

FIG. 4 is an extended plan view of a cradle for mold replacement of the injection molding machine of the present invention.

FIG. 5 is a view showing an arrangement of stoppers.

FIG. 6 is a view showing a state of movement of a mold replacement pedestal of the injection molding machine of the present invention.

FIG. 7 is a view showing a folded state of a mold replacement pedestal of the injection molding machine of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Safety door 7 Frame 8 Frame cover 10 Mold exchange guide member 13 Guide roller 21 Seat 22 Bracket 24 Mold exchange pedestal 25 Fixed pedestal 27 Shaft 28 Movable pedestal 31, 32 Liner 34 Stopper

────────────────────────────────────────────────── (5) References JP-A-64-71721 (JP, A) JP-A-64-24716 (JP, A) JP-A-62-92822 (JP, A) JP-A 63-92822 168321 (JP, A) Fully open sho 64-11713 (JP, U) Really open sho 64-9719 (JP, U) Fully open sho 61-5622 (JP, U) Fully open 2-1810 (JP, U) Japanese Utility Model Showa 54-121918 (JP, U) Japanese Utility Model Showa 64-25115 (JP, U) Japanese Utility Model Showa 59-134524 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B29C 45/00-45/24

Claims (1)

(57) [Claims] 1. A mold replacement pedestal of an injection molding machine in which a movable platen is moved along a tie bar and is freely movable toward and away from a fixed platen. (A) The two platens for guiding a mold (B) a bracket extending and fixed to the side of the injection molding machine from a position on the frame corresponding to the guide roller, and (c) a mold fixed to the bracket. (D) the mold replacement pedestal is fixed to the bracket and fixed to the bracket, and is rotatably provided to the fixed pedestal via a shaft. A mold replacement cradle for an injection molding machine, comprising: a movable cradle; and a liner having a small coefficient of friction disposed on both cradles.