JP3449543B2 - Electric rotary vertical 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 in which a mold is divided and attached to a rotatable turntable on a machine base and a movable plate above and below which can be raised and lowered. The present invention relates to an electric rotary molding machine for tightening.

[0002]

In the vertical molding machine in which the turntable is rotatably mounted on the base on the upper part of the machine base, the base receives the mold clamping force applied from the movable plate side, and after the mold is closed. The upper and lower dies are strongly clamped. Therefore, the turntable must be in contact with the upper surface of the base during mold clamping. On the other hand, when the rotary disk is in contact with the upper surface of the base during rotational driving, the smoothness of rotation is impaired due to frictional resistance, so the rotary disk is rotated away from the upper surface of the machine base.

In a conventional rotary type vertical molding machine which uses hydraulic power as a drive source, a drive device having a combination of a hydraulic cylinder and a hydraulic motor is attached to the lower side of the center of the base, and a piston connected to the center of the turntable during rotation. At the same time, the turntable is slightly raised to form a clearance between the turntable and the upper surface of the base, and while maintaining this state by the hydraulic cylinder, the hydraulic motor is rotationally driven to a predetermined stop position. At the stop position, the hydraulic cylinder stops releasing the hydraulic cylinder after the hydraulic motor stops, and the turntable descends with the piston and is placed on the upper surface of the base without a gap.

The up and down operation of such a turntable can be easily carried out when the rotary drive source is installed in the center of the base and the drive source is hydraulic. However, the rotary disc is rotated by the gear means using the electric motor as the rotary drive source. When rotating, it is necessary to separately install a lifting hydraulic cylinder in the center of the base.

Of the vertical molding machine, one half of the machine base is a molding section for clamping the mold, and the other half is a take-out section for releasing the molded product, which has a structure enabling insert molding. With the mold clamping device provided in the machine base, the movable plate above the turntable and the mold clamping device are connected via a plurality of traction shafts that stand upright through the base on the machine base. In the case of a type in which the movable platen is lowered by the mold clamping device to perform mold closing and mold clamping, if the hydraulic cylinder for lifting is located inside the center of the machine base, the space for installing the mold clamping device and the protruding device will be reduced. It is narrowly limited, and it is difficult to reduce the size by using an electric motor. Further, since the center of the base and the turntable is occupied by the hydraulic cylinder, it is difficult to dispose the temperature control means between the die on the turntable and the center of the machine base. Have.

The present invention has been conceived in order to solve the above-mentioned conventional problems, and its purpose is to constantly support a rotating disk by a plurality of supporting members embedded in the base so that the center of the base is A new electric rotation that eliminates the lifting device, secures a wide installation space for the mold clamping device and the protrusion device in the machine base, and enables downsizing of the molding machine by adopting an electric motor such as an electric servo motor The purpose is to provide a vertical type molding machine.

[0007]

SUMMARY OF THE INVENTION According to the present invention according to the above object, there is provided a machine base in which one half of a plane is a molding part and the other half is an extraction part, and an upper part is composed of a base having a required thickness, and the base is rotatable on the base. The rotating disc mounted on the table, the rotating device by the electric motor that rotates via the gear means of the rotating disc, the mold clamping device that operates vertically in the machine base of the molding section, and the mold clamping device. A plurality of traction shafts which are connected to the lower end and are pierced through a plurality of places of the base so as to be vertically movable, and a movable plate of a molding section which is laid horizontally on the upper end of the traction shafts and is vertically movable above the rotary plate. And a mold attached separately to the movable platen and the rotary platen and a projecting device provided in the machine base of the take-out part. Identical with a plurality of short pillar-shaped supports having Embedded longitudinally along the circumferential direction is,
The lower surface of the support is always in contact with the support, and the rotating disk is rotatably mounted on the base. The support is made of a bearing alloy or a composite material of synthetic fiber cloth and thermosetting resin. , Is.

Further, according to the present invention, the central portion of the base is formed into a circular seat having a large diameter and a flat convex portion having a hole at the center, and the upper half surface of the half seat located at the molding portion of the circular seat is formed. A plurality of the above-mentioned supporting members are embedded in the circumferential direction, the rotary disk is placed on the circular seat, and the annular gear on the lower surface is housed in the semi-annular groove formed on the molding portion side of the circular seat. It is mounted on a base so that it can rotate freely.

Furthermore, according to the present invention, the above-mentioned protruding device is screwed with a vertically movable protruding pin provided through the base and the rotary disk, and a screw shaft connected to the lower end of the protruding pin.
The screw shaft is composed of a rotatable nut in fixed position on the receiving member side under the base which moves up and down together with the projecting pin, and a pulley integrally fixed to the lower end of the nut member by inserting the screw shaft. , Rotate the nut member with the pulley,
An electric motor that moves the screw shaft up and down together with the projecting pin is provided on the base adjacent to the projecting device.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The figure shows a vertical molding machine capable of insert molding. In the figure, reference numeral 1 is a machine base, which is composed of a base 2 having a required wall thickness, one half of which is a molding portion A and the other half is an extraction portion B.
A turntable 3 is rotatably mounted on the upper surface of the. Reference numeral 4 denotes a mold clamping device, which comprises a toggle mechanism with a pair of links vertically provided in the machine base of the molding section A. Reference numeral 5 is a projecting device, and 6 is a rotary disk drive device (see FIG. 3), which are attached below the base of the take-out part B and are provided vertically in the machine base.

As shown in FIG. 4, the toggle mechanism has the upper link 41 and the lower link 42 with the operating link 43 facing inward, the end of the upper link 41 on the base 2, and the end of the lower link 42. Are pin-coupled to the lower planar rectangular pressure receiving plate 7 and are vertically opposed to each other over the base 2 and the pressure receiving plate 7, and a driving ball screw screwed to a nut-shaped link actuating member 44 at the center thereof. A shaft 45 is erected from the pressure receiving plate 7.

The ball screw shaft 45 is rotatably inserted into and held by a bearing member 46 fitted and fixed to the pressure receiving plate 7, and is vertically provided. A pulley 47 is provided at a lower end protruding from the pressure receiving plate 7.
Is installed. The electric servomotor M1 attached to the pulley 47 and the pressure receiving plate 7 and positioned in the machine base of the take-out section B
As shown in FIG. 1, a timing belt 49 is provided around the pulley 48 of FIG. In addition, the link operating member 4
Indicated at 4 are ear pieces 44a protruding from both sides, which are pin-connected to the operation link 43 and rotatably connected to a pair of links.

At the four corners of the pressure receiving plate 7, the base 2 of the molding part is provided.
The lower ends of four pulling shafts 8 for mold clamping that are vertically movable through four positions are connected to each other, and a movable plate 9 having a flat rectangular shape is attached to the upper ends of the pulling shafts 8. Connects the four corners and hangs horizontally over the molding part.

The movable platen 9 has a mold 10a attached to the facing part of the rotary plate 3 and a mold 10b for closing the mold respectively.
Are divided and attached, and the mold can be opened and closed and the mold can be clamped by raising and lowering the movable platen 9 by the vertical movement of the traction shafts 8 in accordance with the expansion and contraction operation of the toggle mechanism.

Although not shown in the drawing, the injection device may be installed vertically on the upper part of the movable platen 9 with the nozzle side facing downward, and may be installed horizontally on the side part of the molding section A. .

In the mold clamping device 4 as described above, when the screw shaft 45 is positively rotated via the timing belt 49 by the start of the electric servomotor M1 in the mold closed state shown in the drawing, the rotational force is generated by the link operating member 44. , Together with the screw shaft 45, is a moving force in a linear direction that pushes the pressure receiving plate 7 upward. The link actuating member 44 moves on the screw shaft as the screw shaft 45 rotates, and the stress generated there concentrates on both pivot pins of the link mechanism.
The operation link 4 is generated by the reaction force acting on the link operation member 44.
3 is pulled downward at the same time, and the upper and lower links 41, 4
2 will fold inward. As a result, the pressure receiving plate 7 rises together with the traction shafts 8 as the screw shaft 45 rotates, and the mold opening is smoothly performed.

When the screw shaft 45 reversely rotates in the mold open state, the rotational force becomes a moving force for pushing down the pressure receiving plate 7 together with the screw shaft 45 by the link operating member 44. As a result, the upper and lower links 41, 42 extend and the pressure receiving plate 7 descends together with the traction shafts 8, 8 as the screw shaft 45 rotates, and the mold closing moves to the mold clamping.

The central portion of the base 2 is formed into a circular seat 21 by a flat convex portion having a large diameter and having a hole in the center, and a required width is formed on the side of the molded portion A of the circular seat 21. The receiving edges 23 of the same height formed by separating the semi-annular groove 22 are located, and at two points of the receiving edges 23, there are receiving members 23a made of a bearing alloy or the like for receiving the lower surface of the outer periphery of the rotary table 3 during mold clamping. It is buried by slightly projecting (2 mm or less) from the upper surface of the receiving edge.

On the upper surface of the circular seat 21, there is a load resistance,
A plurality of short columnar support members 24 having abrasion resistance and the like are vertically embedded at the same height at a predetermined interval with the upper surface protruding by a predetermined dimension (2 mm) from the upper surface of the base. This support 2
A bearing alloy is used as 4, but a composite material in which a thermosetting polyester resin is impregnated into a synthetic fiber cloth is also used as long as it has load resistance and wear resistance. The one by Ruitex) can also be used. The support 24 made of such a composite material is easy to mold and has slidability, so that it can be used for a long period of time by supplying a small amount of lubricating oil.

The embedding of the above-mentioned supports 24, 24 is carried out by the molding part A.
On the upper surface of the half portion located at, are embedded at five locations along the circumferential direction, and some of them can be supplied with the lubricant through pores (not shown) formed in the base 2. Extraction part B
In the central part, a support member 24 having a pin hole of the above-mentioned projecting device 5 formed in the center is embedded.

As shown in FIG. 3, the projecting device 5 and the electric servomotor M2 and the rotary disk drive device 6 serving as the drive source thereof are suspended below the base of the take-out section B. .

The projecting device 5 includes a projecting rod 51 that is vertically movable through the base 2 and the turntable 3, and a screw shaft 5 connected to the lower end of the projecting rod 51 through a guide member 52.
3 and a nut member 55 in a fixed position rotatably mounted in the receiving member 54 on the lower side of the base 2 by screwing with the screw shaft 53.
And a pulley 56 in which the screw shaft 53 is inserted into the lower end surface of the nut member 55 and integrally fixed thereto, and a guide pin 57 in which the upper end is fixed to the base 2 and is inserted into the guide member 52. .

Below the base 2 adjacent to the protruding device 5, the electric servomotor M2 for rotating the nut member 55 together with the pulley 56 to move the protruding rod 51 up and down together with the screw shaft 53. It is provided. Further, a timing belt 59 is provided on the pulley 58 of the electric servo motor M2 and the pulley 56 of the nut member 55,
Thereby, the rotational movement of the electric servomotor M2 can be transmitted to the nut member 55.

In such a projecting device 5, the rotational movement of the nut member 55 by the electric servomotor M2 is generated by the screw shaft 5
The guide member 52 and the guide pin 57 that prevent the rotation of the No. 3 convert it into a linear motion upward, and the protruding rod 51
Rises together with the screw shaft 53 and the guide member 52, and although not shown in the figure, the protruding pin provided inside the mold 10a is pushed up to release the molded product. When the electric servomotor M2 is rotated in the opposite direction, the linear motion changes downward,
The protruding rod 51 is housed inside the circular seat 21 so as not to interfere with the rotation of the turntable 3.

The rotary disk drive device 6 is composed of an electric servomotor M3 and a speed reducer 61 connected thereto. The speed reducer 61 is mounted upward on the lower side of the base 2 to drive the drive gear 6
2 is made to project in a recess 25 formed on the side of the take-out portion B of the circular seat 21, and an annular gear 31 of the rotary disk 3 described later is provided.
It is designed to mesh with.

The turntable 3 has an outer diameter such that the peripheral edge is located on the upper surface of the receiving edge 23, and has an opening similar to the central hole of the base 2 in the center. Pin holes are drilled at two opposing mold attachment positions. Further, on the back surface, an annular gear 31 is fixedly attached to the outer periphery of the circular seat 21 with an inner gear having an inner diameter and fitted at a required clearance, and a positioning member 32 having a recess on the outer side of the annular gear 31. Are arranged so as to be positioned at right angles to the above-mentioned pin holes of the turntable 3.

In such a turntable 3, a rotary cylinder 33 which is vertically connected to the lower side of the central opening is rotatably fitted in the hole of the base 2 and installed on the upper surface of the circular seat 21. The upper surface of the receiving edge 23 is partially pressed by a holding member 26, which is appropriately pressed, and is supported by a plurality of supporting members 24, 24, while a circular seat 21 having a rotary cylinder 33 as an axis.
It is provided on the upper part of the base 2 so that the upper part can rotate horizontally. Further, the temperature control pipes, wirings, etc. for the molds 10a, 10a installed on the turntable 3 are arranged through the turn barrel 33 so that the turntable 3 is not hindered from rotating.

In the figure, 11 and 11 are slowdown devices, and 12 and 12 are positioning devices, which are air or hydraulic cylinders installed in the molding section A and the unloading section B, respectively. , 11 is the piston rod 1
1a is tangential to the turntable 3 that receives the side surface of the positioning member 32, and in the positioning devices 12 and 12, the stopper at the tip of the piston rod 12a is the positioning member 32.
They are installed at right angles so that they fit into the recesses.

In the electric rotary type vertical molding machine having such a structure, the turntable 3 is rotated 90 ° while being supported by the electric support motors M3 of the turntable driving device 6 on the side while supporting the supporters 24, 24. The molds 10a, 10a on the turntable
Are alternately reciprocated between the molding section A and the unloading section B.

Since the support members 24, 24 withstand the mold clamping force sufficiently, they are hardly deformed by compression, and a proper clearance is formed between the support members 24, 24 and the upper surface of the circular seat 21 when rotating.
Further, since it also has abrasion resistance and sliding resistance, the rotary disk 3 can rotate and move smoothly without causing any great rotation resistance.

Therefore, when the rotary disc 3 is moved up and down so far, that is, when the rotary disc 3 is rotated, the rotary disc 3 is slightly moved upward so that a clearance is formed between the rotary disc 3 and the upper surface of the base plate. At the time of mold clamping, it is not necessary to lower the turntable 3 by an ascending amount to support it on the upper surface of the base before performing mold closing and mold clamping.

Further, since the lifting device for the turntable 3 arranged in the center of the base is unnecessary, wiring and piping can be performed through the center of the base 2 and the turntable 3 which are the center of rotation.
Either the cooling or the heating of the mold can be adopted, and the protrusion of the molded product can be performed by the protrusion device 5 having the electric motor provided below the base 2 as a drive source. It can be automated.

Further, since a large installation space is secured in the machine base, even in a small vertical molding machine, the mold clamping device 4 can be easily arranged in the machine base half by the toggle mechanism, and the other half can be easily installed. The drive source of the mold clamping device 4 by the electric motor is installed in the machine base of the take-out part B of the above-mentioned part, and the installation of the projecting device 5 and its drive device at the upper part of the take-out part B and the turntable drive device 6 is hindered. Since it can be installed without any need, the machine base can be simplified and finished in a compact size.

[Brief description of drawings]

FIG. 1 is a schematic vertical cross-sectional side view of an electric rotary type vertical molding machine according to the present invention when a mold is closed.

FIG. 2 is a plan view of the above machine stand.

3 is a cross-sectional view taken along line I-I of FIG.

FIG. 4 is a schematic vertical cross-sectional side view of a molding section showing a mold closing time and a mold opening time by half.

[Explanation of symbols]

1 machine 2 foundation 3 turntable 4 Mold clamping device 5 Projection device 6 Rotating disk drive 7 Pressure plate 8 traction shaft 9 movable plate 10a, 10b mold 21 circular seat 22 Semi-annular groove 23 Marriage 24 Supporters 31 ring gear 32 Positioning member 51 protruding rod 52 Guide member 53 screw shaft 54 Receiving member 55 Nut member 56 pulley 57 Guide pin

Claims (4)

(57) [Claims] 1. A machine base having a base having a required wall thickness, with one half of the plane being the molding part and the other half being the extraction part, a turntable rotatably mounted on the base, and the turntable. A rotation device by an electric motor that rotates through the gear means of
A vertically operating mold clamping device installed in the machine base of the molding section, a plurality of traction shafts connected to the mold clamping device at the lower end and vertically movably penetrating at multiple locations on the base, and its traction. A movable plate of a molding section which is installed on the upper end of the shaft so as to be able to move up and down on the upper part of the rotary plate, a mold attached separately to the movable plate and the rotary plate, and the machine base of the take-out section. A plurality of short columnar supporting members having load resistance and wear resistance, etc. on the upper surface of the base of the molding section, the upper surface of the base protruding from the upper surface of the base to form a circle at the same height. An electric rotary type vertical molding machine characterized in that it is vertically embedded along a direction, and a lower surface of the support is always in contact with the support so that the rotary disk is rotatably mounted on a base. 2. The electric rotary vertical molding machine according to claim 1, wherein the support is made of a composite material of a bearing alloy or synthetic fiber cloth and a thermosetting resin. 3. The center part of the base is formed into a circular seat with a flat convex part having a large diameter and a hole in the center, and the circumferential direction of the upper surface of the half part located in the molding part of the circular seat. While embedding a plurality of the above-mentioned supporters in the above, place the rotary disc on the circular seat, and put the annular gear on the lower surface in the semi-annular groove formed on the molding part side of the circular seat and rotate it on the base. The electric rotary type vertical molding machine according to claim 1, wherein the electric rotary type vertical molding machine is mounted freely. 4. The projecting device is screwed together with a vertically movable projecting pin provided through the base and the turntable, and a screw shaft connected to the lower end of the projecting pin, so that the screw shaft together with the projecting pin. It is composed of a nut member at a fixed position on the receiving member side under the base that moves up and down, and a pulley that is integrally fixed by inserting a screw shaft at the lower end of the nut member. 2. The electric rotary type vertical molding machine according to claim 1, wherein an electric motor that rotates and moves the screw shaft up and down together with the projecting pin is provided on the base adjacent to the projecting device.