JPH05104563A - Injection molding machine - Google Patents

Abstract

PURPOSE: To obtain a good guiding capability of mold mounting plate and an absolute parallelism of two half molds even if significant higher expansion force is applied by designing a machine so that closing force generated during a closing stage and expansion force generated during an injection stage are passed only through the machine frames in the same manner as for a force between a cylinder plate and mold mounting plate. CONSTITUTION: A fixed mounting plate 2 and a movable mounting plate 8 are provided at a machine frame 1, and a mold closing mechanism is supported at a cylinder plate 3. The movable mounting plate 8 is attached around the horizontal axis so that the movable mounting plate 8 can tilt, and a guide 6 is provided between the mounting plates 2, 8 or the movable mounting plate 8 and the machine frame 1. The movable mounting plate 8 is connected to the cylinder plate 3 and the fixed mounting plate 2 is connected only to the machine frame 1 without a bar. A result is that closing force generated during a closing stage and expansion force generated during an injection stage are passed only through the machine frames in the same manner as for force between the cylinder plate 3 and the mold mounting plate 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding machine.

[0002]

2. Description of the Related Art European Patent Application No. A1-03111
As can be seen in No. 33, one form of injection molding machine consists of a machine frame, a fixed mounting plate and a movable mounting plate, and a cylinder plate that supports a closing mechanism such as a hydraulic, electric machine or hydraulic-mechanical mechanism. Become. The cylinder plate to which the movable mold mounting plate is supported and the fixed mold plate are connected only by the machine frame without interference of struts or bars, whereby the closing force generated during the closing phase and The expansive force generated during the injection stage is passed only through the machine frame as well as between the cylinder plate and the mold mounting plate.

[0003]

In such an injection molding machine, a good guiding action of the mold mounting plate and an absolute parallelism of the two mold halves are provided, even when very high mold expansion forces are brought about. It is desirable to do.

It is an object of the present invention to provide an injection molding machine which provides good guiding action of the mold mounting plate and absolute parallelism of the two mold halves even when very high mold expansion forces are provided. It is in.

[0005]

According to the invention, said and other objects are injection molded, comprising a machine frame, fixed and movable mounting plates, cylinder plates supporting hydraulic, electromechanical or hydraulic-mechanical closing mechanisms. Achieved by the machine. The cylinder plates supporting the movable and stationary mounting plates are connected only via the machine frame, without the help of bars, whereby the closing force generated during the closing phase and the expansion force during the injection phase are , Only through the machine frame, such as between the cylinder plate and the mold mounting plate. At least one mold mounting plate is mounted for tilting about a horizontal axis, while a guide is included between the two mold mounting plates or the movable mounting plate and the machine frame.

In a preferred embodiment of the invention, two mold mounting plates are mounted tiltably about a horizontal axis, while in a further preferred feature of the invention the guide means is one mold mounting plate, preferably one. Includes a guide rail mounted on a fixed die mounting plate, each other die mounting plate being guided on the guide rail by at least one sliding shoe.

Due to the fact that the guide rails are fixed or fixed to the fixed die mounting plate, also a tilting movement with that die mounting plate is carried out. The movable mold mounting plates are guided in sequence on the guide rails and the shape ensures that the relative parallel orientation of the two mold mounting plates is likewise in the case of possible deformations or distortions of the machine frame. It is rotatably connected to the machine frame.

In another preferred aspect of the invention, the guide means includes guide rails mounted to the machine frame and the movable die mounting plate is guided by at least one sliding shoe, while the guide means is movable. At least one spring is provided to allow elastic tilting movement of the mounting plate. In that arrangement a spring can be arranged between the sliding shoe and the movable mounting plate, or the rail can be arranged in the machine frame by one or more springs. In both configurations the mold mounting plates can be inclined with respect to the machine frame and parallel to each other.

Further objects, features and advantages of the present invention will be apparent from the following description of the preferred embodiments.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings at this stage, in the embodiment shown in FIGS. 1 and 2, only the movable mounting plate 8 is mounted by a pivot joint 5 to be tiltable about a horizontal axis. In the embodiment shown in FIGS. 3 to 5, both the movable mounting plate 8 and also the stationary mounting plate 2 are mounted by means of a pivot joint 5 so as to be tiltable about a horizontal axis.

Referring to FIGS. 1 and 2, the main part of the injection molding machine according to the invention is generally indicated by the reference numeral 1 and is a machine frame for fixedly supporting a fixed mounting plate 2 and a cylinder plate 3. is there. The movable mounting plate is shown at 8 in FIGS. The machine frame together with the mold mounting plates 2, 8 and the cylinder plate 3 is expediently cast from spheroidal graphitic iron.

Fixed mold mounting plate 2 and movable mold mounting plate 8 support respective portions 4'of injection mold 4.

The injection unit, together with a feed hopper (not shown), is mounted on the stationary mounting plate 2 in the usual manner. The injection unit and the feed hopper are not part of the subject matter of the invention and are designed in a conventional manner, so that they are not described in detail here.

The cylinder plate 3 supports a closing mechanism which includes a piston-cylinder unit 7 which in turn supports a movable mounting plate 8. The piston-cylinder unit 7 is thus operable to move the mold mounting plate 8 between the mold open and mold closed positions and to hold the movable mold mounting plate 8 in the medium mold closed state during the injection operation, the mold half 4 '. Are pressed together.

It will be appreciated that other shapes of the mold closure mechanism may be used, for example an electromechanical or hydraulic-mechanical assembly.

In the case of a closing unit in which the mold closing forces are transmitted only by the machine frame structure 1 without interconnecting bars or struts, the structure is subject to a tendency to open in the upper region of the forming tool.

Therefore, according to the invention, a pivot 5 is provided in association with the cylinder or piston of the piston-cylinder unit 7, in which the piston-cylinder unit 7 is provided with at least the movable mounting plate 8 of FIGS. A tiltable connection is provided about a substantially horizontal axis. It should be noted in this respect that in the embodiment shown in FIGS. 3 and 4, the fixed mounting plate 2 is also tiltably mounted on the machine frame 1 by means of a pivot 5.

The tilting possibility of the mold mounting plate 8 makes it possible to support it in a parallel relationship with the stationary mold mounting plate 2 when the movable mold mounting plate 8 is provided with a high closing force. The operation is similar to that in the structure shown in FIGS. 3 and 4 in relation to the fixed mounting plate 2 fixedly moored to the machine frame 1 as in the case of the structure shown in FIGS. In the case of the fixed type mounting plate 2 which is rotatably mounted on the machine frame 1,

Considering now FIGS. 1, 2 and 4,
In those machines, the guide rail 6 is attached to the machine frame 1 and is preferably screwed onto the machine frame. The movable mounting plate 8 includes a sliding shoe 10. However, the sliding shoe 10 is connected to the movable die mounting plate 8 by means of a plurality of springs indicated by reference numeral 11 in FIG. It can be tilted to fit the position of the mounting plate 2.

In the illustrated embodiment, as can be seen from FIG. 6, the sliding shoe 10 is movable by means of a pin or bolt 12 carrying a sleeve with a flange 13 against which a spring 11 bears. It is fixed to the mounting plate 8.

Two springs or spring packs 11 are arranged in the longitudinal direction of the guide rail 6 in order to provide a good guiding action of the movable mounting plate 8. It is understood that the guide rail 6 can be arranged on the working side and also on the rear side of the injection molding machine or the frame structure 1.

It should be further noted that, instead of the spring pack 11, a small hydraulic cylinder can also be mounted on the mold mounting plate 8.

In the embodiment shown in FIG. 5, the guide rail 6 is provided by means of a plurality of springs or spring packs 11 with a machine frame 1
On the other hand, the sliding shoe 10 which is attached to the movable type mounting plate 8 is firmly connected to the movable type mounting plate 8. Therefore, if a tilting movement of the movable mounting plate takes place, the guide rail 6 is also tilted and can move vertically with respect to the machine frame 1. Again, a precision fit of the movable die mounting plate 8 to the fixed die mounting plate 2 occurs independent of any deformation or distortion of the machine frame. In this case, the spring pack 11 may be replaced by a hydraulic cylinder.

In the embodiment shown in FIG. 3, the guide rail 6 is directly fixed to the fixed mounting plate 2 with screws. The guide rail 6 therefore also carries out a tilting movement with the stationary mounting plate 2.

The movable mounting plate 8 is again moved to the sliding shoe 10
And the sliding shoe is guided in such a way that it exactly surrounds the guide rail 6 and prevents it from being lifted vertically.

The fact that the movable mold mounting plate 8 is guided on the guide rails 6 means that the mold mounting plates 2, 8 and the mold part 4'are slightly deformed or distorted by the machine frame 1 due to the extremely high mold expansion force. Assure that they are parallel to each other.

The shape of the machine according to the invention means that the space between the cylinder plate 3 and the fixed mold mounting plate 2 is free so that the mold structure 4 can be easily approached.

It will be understood that the discharge device and other peripheral equipment are provided in connection with the machine according to the invention.

It will be further understood that the above-described embodiments of the machine according to the invention have been described only by way of illustration of the invention and that various modifications and variations thereby do not depart from the spirit and scope of the invention. It means that it can be done.

[0030]

As described above, according to the present invention, the machine frame, the fixed and movable mold mounting plates, the cylinder plate supporting the closing mechanism, and the means for mounting at least one mold mounting plate so as to be tiltable about the horizontal axis. , And two mold mounting plates or guides between the movable mounting plate and the machine frame, the cylinder plate and the fixed mold mounting plate against which the movable mounting plate is supported without a bar. The closing force generated only during the closing phase and the expanding force generated during the injection phase, which are connected only by the machine frame, are passed through the machine frame as well as between the cylinder plate and the mold mounting plate. Since it is designed to be passed only through the mold, injection molding that provides good guiding action of the mold mounting plate and absolute parallelism of the two mold halves even when a very high mold expansion force is brought about. It is possible to provide a.

[Brief description of drawings]

FIG. 1 is a side view showing an injection molding machine according to the present invention.

2 is a side view of the injection molding machine of FIG. 1 in different operating positions.

FIG. 3 is a side view showing a part of another embodiment of the injection molding machine according to the present invention.

FIG. 4 is a side view showing a part of still another embodiment of the injection molding machine according to the present invention.

FIG. 5 is a side view showing a part of still another embodiment of the injection molding machine according to the present invention.

FIG. 6 is a vertical sectional view of a movable mounting plate in a sliding shoe region of an injection molding machine according to the present invention.

[Explanation of symbols]

 1 Machine frame 2 Fixed type mounting plate 3 Cylinder plate 4 Type structure 4'type part 5 Axis joint 6 Guide rail 7 Piston-cylinder unit 8 Movable type mounting plate 10 Sliding shoe 11 Spring (spring pack)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Heinz Leonhardtsberger, Austria Aer-4311 Schyuweltberg, Perger Schyutraße 13 (72) Inventor Helmut Naderhiln, Austria A-4320 Perc, Posherhels Edorung 23 (72) Inventor Würner Katzpermieurer, Austria, A-4311 Schyuweltberg, Lina 8 (72) Inventor Ott Urbanek, Austria, A-4020 Linz, Landschutlerse 13

Claims (14)

[Claims] 1. A machine frame, fixed and movable mold mounting plates, a cylinder plate supporting a closing mechanism, means for mounting at least one mold mounting plate so as to be tiltable about a horizontal axis, and two mold mounting plates or The cylinder plate and the fixed mounting plate, which consist of guides between the movable mounting plate and the machine frame, against which the movable mounting plate is supported are connected only by the frame without bars. As a result, the closing force generated during the closing step and the expansion force generated during the injection step are passed only through the machine frame as between the cylinder plate and the mold mounting plate. Injection molding machine. 2. The injection molding machine according to claim 1, wherein the mold mounting plates are mounted so as to be tiltable about respective horizontal axes. 3. The guide includes a guide rail attached to the one die mounting plate, and at least one sliding shoe supported by the other die mounting plate and guided on the guide rail. The injection molding machine according to claim 2, which is characterized in that. 4. The injection molding machine according to claim 3, wherein the guide rail is attached to the fixed die mounting plate. 5. The guide includes a guide rail attached to the machine casing and at least one sliding shoe supported by the movable mounting plate and slidable on the guide rail, and further the guide. The injection molding machine according to claim 1, further comprising at least one spring adapted to allow elastic tilting movement of the movable mounting plate. 6. The injection molding machine according to claim 5, wherein the spring is disposed between the sliding shoe and the movable die mounting plate. 7. The guide rail is arranged on the machine frame by at least one spring.
The injection molding machine described in 1. 8. The injection molding machine according to claim 5, wherein the spring is a leaf spring. 9. The injection molding machine according to claim 1, wherein the closing mechanism includes a piston-cylinder unit and further includes pivot means for pivotally connecting a cylinder of the unit to the machine casing. .. 10. A machine frame means, a first mounting plate supporting a first mold part fixed to said machine frame means, cooperable with said first mold part to define a mold cavity, and A second mounting plate for supporting a second mold part movable with respect to the first mounting plate during opening and closing of the mold; support means on the main machine frame means in fixed relation with the main machine frame means; Means for supporting and means operatively connected to said second mounting plate and for moving said second mounting plate between said open and closed states of the mould, whereby the closing force and the injection step generated during the mold closing movement. The mold expansive force generated between the supporting means and the first mounting plate, as well as the actuating means supported by the machine frame means, of an axis line that is at least substantially transverse to the direction of the mold opening and closing movement. At least one that can be tilted around 2. An injection molding machine comprising: a means for attaching the mounting plate, and a means for guiding the second mounting plate in a mold opening / closing movement thereof. 11. The injection molding machine according to claim 10, wherein the axis is horizontal. 12. The injection molding machine according to claim 10, wherein the actuating mechanism is a hydraulic structure. 13. The injection molding machine according to claim 10, wherein the actuating mechanism is an electromechanical structure. 14. The injection molding machine according to claim 10, wherein the actuating mechanism is a hydraulic-mechanical structure.