JP2001179767A - Motor-operated rotary vertical molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rationalize motor-operated rotary vertical molding machine by making the employment of an electric motor as a driving source possible by securing a wide installation space in a machine base by omitting an elevator in the middle of a rotary board by supporting the rotary board always by supporters embedded in a base. SOLUTION: A half part of a plane in a molding part A, the other half as an ejection part B, the upper part of the machine base 1, and the base 2 is installed. The rotary board 3 is mounted freely rotatably on the base 2. The motor which rotates the rotary board 3 by gears is installed in the machine base of the ejection part B. A mold clamping device 4 is installed in the machine base of the molding part A. The lower ends of towing shafts 8 formed freely vertically movably on the base 2 are connected to the mold clamping device 4, and a movable board 9 which is supported horizontally at an upper end is installed freely vertically movably. Molds 10a, 10b are installed in the movable board 9 and the rotary board 3. A projection device 5 with a driving source made an electric motor is installed in the machine base of the ejection part 4. The rotary board 3 is mounted freely rotatably on the base with the lower surface contacted always with the supporters 24 embedded in the upper surface of the base board of the molding part A. The supporters 24 are made of a composite material comprising a bearing alloy or a synthetic fiber cloth and a thermosetting resin, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold which is divided and mounted on a rotatable rotary plate on a machine base and a movable plate above and below which can be raised and lowered, and the movable platen is moved up and down to open and close the mold. The present invention relates to an electric rotary molding machine for tightening.

[0002]

In a vertical molding machine in which a turntable is rotatably mounted on a base on an upper portion of a machine base, the base receives a mold clamping force applied from a movable platen side, and the mold is closed. The upper and lower molds are strongly clamped. For this reason, the rotating disk at the time of mold clamping must be in contact with the upper surface of the base. 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. Therefore, the rotary disk is driven away from the upper surface of the machine base.

In a conventional rotary vertical molding machine in which a driving source is hydraulic, a driving device in which a hydraulic cylinder and a hydraulic motor are combined is mounted on the lower side of the center of a base, and a piston connected to the center of the rotating disk during rotation. At the same time, the turntable is slightly lifted to form a clearance between the turntable and the upper surface of the base, and the state is maintained by a hydraulic cylinder, and the rotary motor is driven to rotate to a predetermined stop position by a hydraulic motor. At the stop position, after the hydraulic motor is stopped, the hydraulic cylinder stops lifting and the rotary disk is lowered together with the piston and placed on the upper surface of the base plate without any gap.

[0004] Such a lifting and lowering operation of the rotary disk can be easily carried out when the rotary drive source is installed at the center of the base and the drive source is hydraulically driven. However, the rotary disk is driven by gear means using an electric motor as the rotary drive source. , It is necessary to separately provide a hydraulic cylinder for raising and lowering at the center of the base.

[0005] Among the vertical molding machines, one half of the machine stand is used as a molding section for clamping a mold, and the other half is used as a take-out section for releasing a molded product. With the mold clamping device provided in the machine base, the movable plate above the turntable and the mold clamping device are connected through a plurality of towing shafts erected through the base on the machine base, In the type where the movable platen is lowered by the mold clamping device to close and clamp the mold, if the lifting and lowering hydraulic cylinder is located inside the center of the machine base, the installation space for the mold clamping device and the projecting device is increased. It is narrowly limited, and it is difficult to reduce the size by using an electric motor. In addition, since the center of the base and the turntable is occupied by the hydraulic cylinder, it is difficult to arrange temperature control means between the base and the mold on the turntable using the center of the machine. Have.

The present invention has been conceived in order to solve the above-mentioned conventional problems. It is an object of the present invention to always support a turntable with a plurality of supports buried on a base, thereby enabling the center of the base to be fixed. New electric rotation that eliminates the lifting and lowering device, secures a large installation space for the mold clamping device and the protruding device in the machine base, and also enables the molding machine to be downsized by using an electric motor such as an electric servomotor. An object of the present invention is to provide a vertical molding machine.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a machine which comprises a base having a required thickness and an upper portion formed by using a half of a plane as a molding portion and another half as an extraction portion, and the base is rotatable. A rotating device mounted on the machine, a rotating device driven by an electric motor in the machine on the side of the take-out unit that rotates the rotating machine via gear means, and a mold clamp installed in the machine of the forming unit and operating in the vertical direction Device, a plurality of towing shafts which are connected to the lower end of the mold clamping device and are vertically movable at a plurality of locations on the base plate, and are vertically suspended on the upper end of the rotating plate by being laid on the upper end of the towing shaft. It comprises a movable plate of a molding portion freely provided, a mold divided and mounted on the movable plate and the rotary plate, and a projecting device provided in a machine of the take-out portion, and an upper surface of a base of the molding portion. In addition, a plurality of short columnar supports having load resistance and wear resistance, etc. The lower surface of the turntable is always in contact with the support, and is rotatably mounted on the base. The support is a composite of a bearing alloy or a synthetic fiber cloth and a thermosetting resin. It consists of materials and the like.

Further, the present invention is characterized in that the central portion of the base is formed as a circular seat having a large diameter and a flat convex portion having a hole at the center, and the upper surface of the half portion located at the molding portion of the circular seat is formed. A plurality of the supports are buried in the circumferential direction, and the turntable is placed on the circular seat, and the annular gear on the lower surface is housed in a 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.

Still further, according to the present invention, the protruding device is screwed with a vertically movable protruding pin provided through the base and the turntable, and a screw shaft connected to a lower end of the protruding pin.
It comprises a rotatable fixed nut member on the side of the receiving member below the base that moves the screw shaft up and down together with the protruding pin, and a pulley that is integrally fastened by inserting the screw shaft through the lower end of the nut member. , Rotate the nut member with the pulley,
An electric motor for moving the screw shaft up and down together with the protruding pin is provided on a base adjacent to the protruding device.

[0010]

FIG. 1 shows a vertical molding machine capable of insert molding. In the figure, reference numeral 1 denotes a machine base, which is formed by forming a half of a plane as a molding part A and taking the other half as a takeout part B and having an upper portion formed of a base 2 having a required thickness.
The turntable 3 is rotatably mounted on the upper surface of the disk. Reference numeral 4 denotes a mold clamping device, which comprises a toggle mechanism with a pair of links provided vertically in the machine base of the forming section A. Reference numeral 5 denotes a protruding device, and reference numeral 6 denotes a rotary disk drive (see FIG. 3), which are attached to the lower side of the base of the take-out portion B and are provided vertically in the machine base.

As shown in FIG. 4, the toggle mechanism has an upper link 41 and a lower link 42 with an operating link 43 facing inward, an end of the upper link 41 on the base 2 and an end of the lower link 42 on the base 2. Are respectively pin-connected to the lower flat rectangular pressure receiving plate 7, and are vertically installed across the base 2 and the pressure receiving plate 7, and a driving ball screw screwed into a central portion thereof with a nut-like link operating member 44. The shaft 45 stands from the pressure receiving plate 7.

The ball screw shaft 45 is vertically provided rotatably inserted and held in a bearing member 46 fitted and fixed to the pressure receiving plate 7, and has a pulley 47 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 of the take-out portion B
A pulley 48 is provided with a timing belt 49 as shown in FIG. In addition, the link operating member 4
Reference numeral 4 denotes a lug 44a protruding on both sides, which is pin-connected to the operating link 43, and rotatably connected to a pair of links.

At the four corners of the pressure receiving plate 7, a base 2
The lower ends of four towing shafts 8 and 8 provided for free movement up and down through four locations are connected to each other, and the upper end of each of the towing shafts 8 and 8 has a flat rectangular movable plate 9. Are connected horizontally at the four corners and are horizontally laid over the upper part of the molded part.

The movable platen 9 has a mold 10a attached to a position opposite to the rotary plate 3 and a mold 10b for closing the mold.
The mold is opened and closed and the mold is clamped by moving up and down the movable platen 9 by the up and down movement of the traction shafts 8, 8 accompanying the expansion and contraction operation of the toggle mechanism.

Although not shown in the drawings, the injection device may be installed vertically on the movable plate 9 with the nozzle side facing down, or may be installed horizontally on the side of the molding portion A. .

In such a mold clamping device 4, when the screw shaft 45 is rotated forward via the timing belt 49 by the start of the electric servomotor M 1 in the mold closed state shown in FIG. , And a moving force in a linear direction to push the pressure receiving plate 7 upward together with the screw shaft 45. The link operating member 44 moves on the screw shaft with the rotation of the screw shaft 45, and the generated stress concentrates on both pivot pins of the link mechanism,
Due to the reaction force acting on the link operating member 44, the operating link 4
3 is simultaneously pulled downward, and the upper and lower links 41, 4
2 bends inward. As a result, the pressure receiving plate 7 rises together with the traction shafts 8 with the rotation of the screw shaft 45, and the mold opening is smoothly performed.

When the screw shaft 45 rotates in the reverse direction 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 and 42 are extended and the pressure receiving plate 7 is lowered together with the traction shafts 8 and 8 with the rotation of the screw shaft 45, and the mold shifts from closing to closing.

The central portion of the base 2 is formed as a circular seat 21 formed by a flat convex portion having a large diameter and a hole at the center. The receiving edge 23 formed at the same height and formed with the semi-annular groove 22 therebetween is located at two locations of the receiving edge 23. A receiving member 23a made of a bearing alloy or the like which receives the outer peripheral lower surface of the turntable 3 at the time of mold clamping is provided. It is slightly buried (less than 2 mm) from the upper surface of the receiving edge.

The upper surface of the circular seat 21 has a load resistance,
A plurality of short columnar supports 24 having abrasion resistance and the like are embedded at predetermined intervals at the same height with the upper surface protruding from the upper surface of the base by a predetermined dimension (2 mm). The support 24 is made of a bearing alloy. However, if the support 24 has load resistance and abrasion resistance, a composite material obtained by impregnating a synthetic fiber cloth with a thermosetting polyester resin ( (Trade name: Luitex) can be used. The support 24 made of such a composite material is easy to mold and has a slidability, so that it can be used for a long time by supplying a small amount of lubricating oil.

The supports 24, 24 are buried in the molded portion A
Are embedded at five locations along the circumferential direction on the upper surface of the half portion, and some of them can be supplied with lubricant through pores (not shown) formed in the base 2. Extraction part B
In the figure, a support 24 having the pin hole of the protruding device 5 formed at the center is buried in the center.

As shown in FIG. 3, the protruding device 5, an electric servomotor M2 serving as a driving source thereof, and the turntable driving device 6 are suspended from the lower side of the base of the take-out portion B, as shown in FIG. .

The protruding device 5 includes a vertically movable protruding rod 51 penetrating the base 2 and the turntable 3, and a screw shaft 5 connected to a lower end of the protruding rod 51 via a guide member 52.
3 and a nut member 55 at a fixed position, which is screwed with the screw shaft 53 and rotatably mounted in a receiving member 54 below the base 2.
And a pulley 56 having a screw shaft 53 inserted through the lower end surface of the nut member 55 and integrally fixed thereto, and a guide pin 57 fixed at the upper end to the base 2 and inserted through the guide member 52. .

Under the base 2 adjacent to the projecting device 5, the electric servomotor M2 for rotating the nut member 55 together with the pulley 56 to move the projecting rod 51 up and down together with the screw shaft 53 is provided. It is provided. A timing belt 59 is provided between the pulley 58 of the electric servomotor M2 and the pulley 56 of the nut member 55,
Thus, the rotational motion of the electric servomotor M2 can be transmitted to the nut member 55.

In such a projecting device 5, the rotation of the nut member 55 by the electric servomotor M2 is
3 is converted into an upward linear motion by a guide member 52 and a guide pin 57 that prevent the rotation of the projection rod 51.
Is raised together with the screw shaft 53 and the guide member 52, and although not shown in the figure, the protruding pins provided in the mold 10a are pushed up to release the molded product. When the electric servomotor M2 is turned in the opposite direction, the linear motion changes downward,
The protruding rod 51 is accommodated in the circular seat 21 so as not to hinder the rotation of the turntable 3.

The rotary disk drive 6 comprises 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 form a drive gear 6
2 is projected into 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 turntable 3 described later.
It is made to mesh with.

The turntable 3 has an outer diameter such that the peripheral edge thereof is positioned on the upper surface of the receiving edge 23, and has an opening in the center similar to the center hole of the base 2; Pin holes are formed at two opposite mold mounting positions. On the back surface, an annular gear 31 of an internal gear having an inner diameter which is fitted to the outer periphery of the circular receiving seat 21 with a required clearance is secured, and a positioning member 32 having a concave portion outside the annular gear 31 is provided. However, they are provided so as to be positioned at right angles to the pin holes of the rotating disk 3.

The rotary disk 3 is mounted on the upper surface of the circular seat 21 by rotatably fitting a rotary cylinder 33 vertically connected to the lower part of the central opening into a hole of the base 2 and installed on the upper surface of the circular seat 21. The upper surface is partially and appropriately held down by a holding member 26 fixed to two places of the receiving edge 23, and is supported by the plurality of supports 24, 24, while the circular receiving seat 21 is pivoted around the rotating cylinder 33.
It is provided on the upper part of the base 2 so as to rotate horizontally. The temperature control pipelines, wiring, and the like to the dies 10a, 10a installed on the rotating disk 3 are disposed through the rotating cylinder 33 so as not to hinder the rotation of the rotating disk 3.

In the figure, reference numerals 11 and 11 denote slow-down devices, and 12 and 12 denote positioning devices, each of which comprises an air or hydraulic cylinder installed in the forming portion A and the take-out portion B. , 11 is the piston rod 1
1a in the tangential direction of the turntable 3 which receives the side surface of the positioning member 32, and the positioning devices 12 and 12
Are installed in the right-angle directions to be fitted in the concave portions.

In the electric rotary vertical molding machine having such a configuration, the rotary disk 3 rotates 90 ° while being supported by the supports 24, 24 by the electric servomotor M3 of the rotary disk drive device 6 on the side. And the above-mentioned molds 10a, 10a
Reciprocate alternately between the forming part A and the take-out part B.

Since the supports 24, 24 sufficiently withstand the mold clamping force, there is almost no compressive deformation, and a certain clearance is formed between the supports 24 and the upper surface of the circular seat 21 during rotation.
In addition, since it also has abrasion resistance and sliding resistance, the rotating disk 3 can rotate smoothly without any trouble without generating large rotation resistance.

Accordingly, the up-and-down operation of the turntable 3 up to now, that is, the turntable 3 is slightly moved upward at the time of rotation to form a clearance between the turntable 3 and the upper surface of the base, whereby the rotation is smoothly performed. In closing the mold, the operation of closing the mold and closing the mold after the turntable 3 is lowered by the rising amount and supported by the upper surface of the base is not required.

Further, since there is no need for an elevating device for the turntable 3 disposed at the center of the base, wiring and piping can be performed through the center of the turntable 3 and the base 2 which is the center of rotation.
The temperature control of the mold can be either cooling or heating, and the molded product can be protruded by the protruding device 5 driven by an electric motor provided below the base 2. It can be automated.

Further, since the installation space in the machine base is ensured widely, even in a small vertical molding machine, the mold clamping device 4 by the toggle mechanism can be easily arranged in the machine half, and the other half. The drive source of the mold clamping device 4 by the electric motor in the machine base of the take-out part B, the protruding device 5 at the upper part of the take-out part B and its driving device, and the installation of the turntable driving device 6 are hindered. Since it can be installed without the need, the surroundings of the machine can be simplified and finished compactly.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the machine base.

FIG. 3 is a sectional view taken along line II of FIG. 2;

FIG. 4 is a schematic longitudinal sectional side view of a molding part showing a mold closing time and a mold opening time each half.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 machine base 2 base 3 turntable 4 mold clamping device 5 protrusion device 6 turntable drive device 7 pressure receiving plate 8 traction shaft 9 movable plate 10 a, 10 b mold 21 circular seat 22 semi-annular groove 23 receiving edge 24 support 31 annular Gear 32 Positioning member 51 Projecting rod 52 Guide member 53 Screw shaft 54 Receiving member 55 Nut member 56 Pulley 57 Guide pin

Claims (4)

[Claims] 1. A machine base comprising a base having a required thickness at an upper portion, with one half of a plane being a molding part and the other half being an extraction part, a turntable rotatably mounted on the base, and the turntable A rotating device by an electric motor that rotates through gear means of
A vertically-operating mold clamping device installed in the machine base of the forming section, a plurality of tow shafts connected to the lower end of the mold clamping device and vertically penetrating through a plurality of locations on the platform, and A movable plate of a forming part which is mounted on the upper part of the rotary plate so as to be able to move up and down horizontally on the upper end of the towing shaft, a mold divided and mounted on the movable plate and the rotary plate, and a machine base of the take-out part A plurality of short columnar supports having load resistance and abrasion resistance etc. are buried along the circumferential direction on the upper surface of the base of the molded portion,
An electric rotary vertical molding machine characterized in that the lower surface of a rotating disk is always in contact with the support and is rotatably mounted on a base. 2. The electric rotary vertical molding machine according to claim 1, wherein said support is made of a bearing alloy or a composite material of a synthetic fiber cloth and a thermosetting resin. 3. A central portion of the base is formed as a circular seat having a large diameter and a flat convex portion having a hole at the center, and a circumferential direction of an upper surface of a half portion located at a molding portion of the circular seat. A plurality of the supports are buried, and the rotating disk is placed on the circular seat, and the annular gear on the lower surface is housed in a semi-annular groove formed on the molding part side of the circular seat and rotated on the base. 2. The electric rotary vertical molding machine according to claim 1, wherein the vertical molding machine is freely mounted. 4. The protruding device is screwed together with a vertically movable protruding pin provided through a base and a rotating disk, and a screw shaft connected to a lower end of the protruding pin. It consists of a rotatable fixed position nut member on the receiving member side under the base that moves up and down, and a pulley that has a screw shaft inserted into the lower end of the nut member and is fixed together, and the nut member is assembled together with the pulley. The electric rotary vertical molding machine according to claim 1 or 3, 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.