JPH0632332Y2 - Mold clamping machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a molding machine for injecting a resin into a mold to perform mold clamping molding.

[Conventional technology]

In this type of molding machine, as shown in FIG. 5, a mold clamping support 19 is connected to a fixed platen 25 through a tie bar 20, a mold clamping cylinder 21 is attached to the support 19, and a piston tip of the cylinder 21 has A mold clamping device 18 that connects a movable platen 22 that is slidably attached to a tie bar 20, and that can open and close and mold-clamp the molds 23 and 24 that are mounted on the fixed platen 25 and the movable platen 22, respectively.
Is equipped with. Then, when the resin is injected into the molds 23 and 24 which are clamped, the fluidity of the resin in the molds is improved,
In addition, the molds 23, 2 are used to bleed air during resin injection.
Since it is necessary to incline 4 at an angle suitable for the molded product, the bracket 27 provided on the base base 26 is provided with a mold clamping support 19
The side part of is rotatably attached by a pin 28,
Tilt cylinder 29 on mold clamping support 19 and base 26
Both ends of the mold are rotatably connected, and the cylinder 29 allows the entire mold clamping device 18 to be tilted.

[Problems to be solved by the device]

However, since the mold clamping device 18 is a heavy object, it needs a large base base 26 and a bracket 27 to support it.
Is required. Further, at the time of work such as mold replacement, it is necessary to adjust the tilt angle of the mold clamping device 18 so that the mold mounting space between the fixed platen 25 and the movable platen 22 is not covered by the base 26 and the bracket 27. Therefore, the workability is poor. Further, since the mold clamping device 18 is tilted and supported by one tilting cylinder 29, the tilting cylinder 29 corresponding to the position of the center of gravity of the mold clamping device 18 changing momentarily during tilting.
However, this is not easy to get along with, and the mold clamping device 18 cannot be tilted in a stable manner.
When a trouble such as oil leak occurs in the control system of the tilting cylinder 29, the mold clamping device 18 falls down, and it is inevitable that the mold clamping device 18 is dangerous.

[Purpose of device]

The present invention has been made in order to solve the above-mentioned problems, and the mold mounting space is always opened regardless of the tilting angle to greatly improve the workability and to securely and stably support the mold clamping device. The purpose is to be able to tilt.

[Means for Solving the Problems]

A mold clamping molding machine according to the present invention has an outer peripheral surface having an arcuate shape in a side view around a rotation center and a notch portion formed on the rotation center side and formed of two orthogonal surfaces, and includes one of the mold clamping devices. A rotary base frame that forms a part, a plurality of tie bars that are erected on one surface of the cutout portion of the rotary base frame, a mold clamping support that connects the tip sides of the plurality of tie bars, and the mold clamping support. A movable platen slidably attached to the tie bar between the one surface of the cutout portion, a mold clamping drive device provided on the mold clamping support for driving the movable platen, and the rotary base frame in an arc shape. The outer peripheral surface is characterized by comprising a support frame rotatably supported in a vertical plane, and a rotary drive device provided between the support frame and the rotary base frame. It is intended to achieve the purpose.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In the figure, reference numeral 1 denotes a support frame, and a plurality of support rollers 4 are rotatably attached to the upper portion of the frame 1 via a bracket 2 by pins 3.

5 is a mold clamping device 1 which constitutes a part of a mold clamping device 18 described later.
8 rotating base frame (hereinafter referred to as rotating frame)
In the frame 5, the frame 5 is L-shaped in a side view, and a notch 6 composed of two orthogonal surfaces and an outer peripheral surface 7 having a circular arc shape in a side view centered on the rotation center O are formed.

The rotating frame 5 is rotatably supported on the supporting frame 1 at an arcuate outer peripheral surface 7 via a supporting roller 4 in a vertical plane.

Reference numeral 8 denotes a rotary drive device, which includes a chain 9 provided on the rotary frame 5, a sprocket 10 provided on the support frame 1, a hydraulic motor 11 for rotating the sprocket 10, and a worm speed reducer 12 having a motor shaft connected to a motor shaft thereof. It consists of An electric motor may be used instead of the hydraulic motor.

The chain 9 is provided along the arcuate outer peripheral surface 7 of the rotating frame 5 and adjacent to the contact line of the support roller 4.

The sprocket 10 is mounted on a rotary shaft 14 rotatably mounted on the support frame 1 via a bearing 13, and meshes with the chain 9.

The hydraulic motor 11 and the worm reducer 12 are installed on the support frame 1 via a reducer base 12 '.

The driven shaft of the worm speed reducer 12 and the rotary shaft 14 to which the sprocket 10 is attached are fitted with sprockets 15 and 16, respectively, and the chain 1 is interposed between the sprockets 15 and 16.
7 is hung around.

Reference numeral 18 denotes a mold clamping device, which connects one piece 5A of the rotary frame 5 having one surface of the cutout portion 6 to a mold clamping support 19 placed on the other piece 5B via a tie bar 20. A mold clamping cylinder 21 is attached to the support 19, a movable platen 22 slidably attached to a tie bar 20 is connected to the piston tip of the cylinder 21, and one piece 5A of the movable frame 5 faces the piece 5A. Movable platen 2
It is possible to open and close the molds and clamp the molds 23 and 24 respectively mounted on the mold 2.

In this embodiment, a chain 9 is provided on the arcuate outer peripheral surface 7 of the rotary frame 5 as the rotary drive device 8, a sprocket 10 that meshes with the chain 9 is provided on the support frame 1, and the sprocket 10 is connected to the speed reducer 12. Although the example in which the hydraulic motor 11 is used to enable rotation via the above, it is needless to say that the arcuate outer peripheral surface 7 of the rotating frame 5 may be provided with gear teeth or the like instead of the chain 9.

[Action]

Since the rotary frame 5 is used as the base frame of the mold clamping device 18, the rotary frame 5 becomes a part of the mold clamping device, one piece 5A serves as a fixed platen, and the other piece 5B serves as a bed. When the movable platen 22 is slidably advanced along the tie bar 20 by the cylinder 21, the molds 23 and 24 are clamped.

Since the chain 9 provided on the arcuate outer peripheral surface 7 of the rotary frame 5 meshes with the sprocket 10 supported by the bearing on the support frame 1, the hydraulic motor 11 causes the worm speed reducer 12 and the chain / sprocket type interlocking mechanism to intervene. When the sprocket 10 is rotated by rotating the sprocket 10, the rotating frame 5 is smoothly rotated with the rotation of the sprocket 10.

Since the worm reducer 12 has a self-locking action when the hydraulic motor 11 is stopped, the torque applied to the sprocket 10 from the rotating frame 5 side is less likely to be transmitted to the hydraulic motor 11 via the worm reducer 12.

As described above, since the mold clamping device 18 is supported by the rotating frame 5 and is rotated around the outer periphery of the frame, the mold mounting space is always open regardless of the tilt angles of the molds 24 and 25. .

[Effect of device]

As described above, according to the present invention, the mold clamping device having the rotating frame as the base frame as a part of the device is rotated while being supported on the outer peripheral portion of the rotating frame. Mold tilting operation for improving fluidity and bleeding air during resin injection, that is, the mold clamped even though the position of the center of gravity of the mold clamping device changes momentarily during tilting. It is possible to always perform a stable operation of tilting the mold to the angle suitable for the molded product, and always open the mold mounting space regardless of the mold tilt angle to replace the mold and remove the molded product. It is possible to easily perform the work such as removing deposits in the mold, and greatly improve workability.

Further, since the rotating frame is used as a base frame which is a part of the mold clamping device, one piece of the rotating frame can be used as a fixed platen and the other piece can be used as a bed, which is a lightweight and compact mold clamping machine. be able to.

[Brief description of drawings]

1 and 2 are a front view and a right side view showing an embodiment of the present invention, FIG. 3 is a partially enlarged view of FIG. 1, FIG. 4 is a plan view of FIG. 3, and FIG. It is a front view which shows a prior art example. 1 ... Support frame, 2 ... Bracket, 3 ... Pin, 4 ... Support roller, 5 ... Rotating frame,
6 ... Notch, 7 ... Arc-shaped outer peripheral surface, 8 ... Rotation drive device, 9 ... Chain, 10 ... Sprocket, 11 ... Hydraulic motor, 12 ... Worm reducer, 13 ... Bearing, 14 ...... Rotary shaft, 15, 16 sprocket, 17 …… Chain, 18 …… Clamping device, 19 …… Clamping support, 20 …… Tie bar, 21 …… Clamping cylinder, 22 …… Movable platen, 23 , 24 ... Mold.

Claims (1)

[Scope of utility model registration request] 1. A rotation forming a part of a mold clamping device, which has an outer peripheral surface having an arcuate shape in a side view around a rotation center and a notch formed on the rotation center side and formed by two orthogonal surfaces. A base frame, a plurality of tie bars that are erected on one surface of the cutout portion of the rotary base frame, a mold clamping support that connects the tip sides of the plurality of tie bars, and the mold clamping support and one surface of the cutout portion. A movable platen slidably attached to the tie bar, a mold clamping drive device provided on the mold clamping support for driving the movable platen, and the rotary base frame in an arc-shaped outer peripheral surface in a vertical plane. A mold clamping and forming machine comprising: a support frame rotatably supported by a rotary drive device and a rotary drive device provided between the support frame and the rotary base frame.