JP6938577B2 - Vertical injection molding machine - Google Patents

Description

The present invention relates to a vertical injection molding device in which an injection device is arranged on a mold clamping device. In this manual, "adjustment" means machine performance, parallelism that meets specifications, and center alignment, and "packaging" refers to the appearance of luggage shipped from the equipment manufacturer to the delivery destination, and "transportation". Refers to the act of transporting luggage from the equipment manufacturer to the delivery destination, and the "delivery destination" is the delivery destination. In the present invention, reassembly and readjustment are performed at the delivery destination.

The main components of the injection molding device are a mold clamping device that opens and closes the mold and an injection device that injects a resin material into the mold.
A device in which the mold opening and closing and injection are horizontal is called a horizontal injection molding device, and a device in which the mold is opened and closed vertically is called a vertical injection molding device.

As a vertical injection molding apparatus, for example, an apparatus disclosed in Patent Document 1 is known.
Patent Document 1 will be described with reference to the following figure.
FIG. 9 is a basic configuration diagram of a conventional vertical injection molding device. The vertical injection molding device 100 includes a mold 101, a mold clamping device 102 for opening and closing the mold 101, and the mold clamping device 102. The main element is an injection device 103 which is arranged on the top and whose injection shaft is vertical.

The vertical injection molding apparatus 100 has a smaller installation area than the horizontal injection molding apparatus. On the other hand, since it extends upward, the height dimension H0 of the device inevitably increases.

Generally, the performance of the vertical injection molding apparatus 100 assembled as shown in FIG. 9 is confirmed by the apparatus manufacturer by making adjustments.

After the performance is confirmed, it is desirable that the package be transported in the form shown in FIG. 9 and installed at the delivery destination. However, when transporting to the delivery destination, if the dimension H0 exceeds the height limit stipulated by the road regulations or exceeds the dimension of the transport container, the transport cannot be performed. Even if it can be transported, it may not be possible to carry it in due to the height restrictions of the opening of the building to which it is delivered.

It is possible to clear the height limitation by disassembling the vertical injection molding apparatus 100 shown in FIG. 9 into pieces and reassembling them at the delivery destination.
However, if they are disassembled and transported separately, the number of transportation containers will increase and the transportation cost will increase. In addition, the performance confirmation performed by the equipment manufacturer is not guaranteed by disassembly. As a result, after reassembling at the delivery destination, readjustment is repeated, which prolongs the delivery time and increases the adjustment cost.

While reduction of various costs is required, a vertical injection molding apparatus capable of clearing height restrictions and reducing transportation costs and adjustment costs is desired.

Japanese Patent No. 3618609

An object of the present invention is to provide a vertical injection molding apparatus capable of clearing height restrictions and reducing transportation costs and adjustment costs.

The invention according to claim 1 is a vertical mold whose main elements are a mold, a mold clamping device for opening and closing the mold, and an injection device arranged on the mold clamping device and having a vertical injection shaft. It is an injection molding device
The mold clamping device and the injection device are surrounded and supported by a device frame.
The device frame includes a base frame, first and second columns rising from the base frame, and a top beam connecting the upper end of the first column and the upper end of the second column.
The first support column includes a first lower column rising from the base frame and a first upper column rising from the first lower column, and the first lower column, the first upper column, and the top beam are separated from each other. It is fastened with bolts as much as possible,
The second support column includes a second lower column rising from the base frame and a second upper column rising from the second lower column, and the second lower column, the second upper column, and the top beam are separated from each other. It is fastened with bolts as much as possible,
The injection device is attached to the first upper column.
The length of the second upper column is set to ½ of the length of the first upper column to which the injection device is attached.

The invention according to claim 2 is the vertical injection molding apparatus according to claim 1.
The top beam is characterized by having wire hooking portions for hanging hanging wires at one end and the other end.

The invention according to claim 3 is the vertical injection molding apparatus according to claim 1 or 2.
The first upper column has an upper plate extending horizontally at the upper end, and each end of the upper plate has screw holes for screwing eyebolts.
By hooking the luggage fixing wire on the eyebolt, the first upper column to which the injection device is attached can be transported in an upright position.

The invention according to claim 4 is the vertical injection molding apparatus according to any one of claims 1 to 3.
The first upper column is characterized in that it is positioned on the first lower column by using a positioning pin.

The invention according to claim 5 is the vertical injection molding apparatus according to claim 4.
The positioning pin is characterized by including a large-diameter pin and a small-diameter pin having a smaller diameter than the large-diameter pin.

The invention according to claim 6 is the vertical injection molding apparatus according to claim 4 or 5.
The positioning pin is an insertion pin that can be pulled out from the first upper column and can be pulled out from the first lower column.

In the invention according to claim 1, since the first lower column, the first upper column, and the top beam are separable, the first upper column can be removed from the first lower column after adjustment. Similarly, since the second lower column, the second upper column, and the top beam are separable, the second upper column can be removed from the second lower column.

Since the length of the second upper column is ½ of the length of the first upper column, the upper end of the second lower column is higher than the upper end of the first lower column.
Therefore, a second upper column is erected on the first lower column. Then, the heights of the upper end of the second upper column and the upper end of the second lower column are aligned. In this state, attach the top beam. The remaining first upper column will be handled separately.

The height of the package is lower than the height at the time of adjustment by 1/2 of the length of the first upper column. With this, the height limit can be cleared.

Further, if the components are disassembled into pieces and transported, the number of transportation containers increases and the transportation cost increases. However, in the present invention, only two transportation containers are required, and the transportation cost can be significantly reduced. ..
Further, if the components are disassembled and transported separately, large-scale reassembly and readjustment are required at the delivery destination, which increases the adjustment cost. However, in the present invention, small-scale rearrangement and readjustment are sufficient, and the adjustment cost is high. Can be significantly reduced.

Therefore, according to the present invention, there is provided a vertical injection molding apparatus capable of clearing the height limitation and reducing the transportation cost and the adjustment cost.

In the invention according to claim 2, the top beam includes a wire hooking portion for hanging a hanging wire. It is okay to omit the wire hooking part from the top beam, but it takes time to determine the position to hook the hanging wire, which hinders the so-called slinging work. In this respect, according to the present invention, it is only necessary to hang the hanging wire on the wire hooking portion, and the slinging work is easy and can be completed in a short time.

In the invention according to claim 3, the first upper column to which the injection device is attached can be transported in an upright position by hanging a luggage fixing wire on the eyebolt.
If the injection device with a vertical injection shaft is adjusted, then laid down and transported, and then stood at the delivery destination, the posture will change, making readjustment at the delivery destination difficult. In this respect, in the present invention, since the posture of the injection device does not change, readjustment at the delivery destination is minor.

In the invention according to claim 4, the first upper column is positioned on the first lower column by using a positioning pin. Since the position is determined by the positioning pin, the position of the first upper column is determined with respect to the first lower column, and reassembly at the delivery destination becomes easy.

In the invention according to claim 5, the positioning pin includes a large-diameter pin and a small-diameter pin. Since the outer diameters are different, it is possible to prevent the occurrence of incorrect assembly.

In the invention of claim 6, the positioning pin can be removed from the first upper column and the first lower column. At the time of shipment, the second upper column is erected on the first lower column with the positioning pin removed. It is not necessary to provide a pin hole in the second upper column. Since it is not necessary to provide a pin hole, the second upper column and the first upper column can have different dimensions in the horizontal direction, which increases the degree of freedom in design.

It is a front view of the vertical injection molding apparatus which concerns on this invention. It is a perspective view of the apparatus frame. It is a 3 arrow view of FIG. 1, and is a figure explaining the basic configuration of the injection device. It is a figure explaining the basic structure of the mold clamping device. (A) is a front view of the device frame, (b) is an exploded view of the device frame, (c) is an enlarged view of part c of (b), and (d) is a dd arrow view of (b). (A) is a diagram for explaining the rearrangement of the device frame, and (b) is a diagram showing the device frame after the rearrangement. (A) is a diagram for explaining the packing shape of the vertical injection molding device, and (b) is a diagram for explaining the packing shape of the injection device. It is a figure which shows the modification example, (a) is the front view of the apparatus frame which concerns on the modification example, and (b) is the figure which shows the packing style which concerns on the modification example. It is a basic block diagram of the conventional vertical injection molding apparatus.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the vertical injection molding apparatus 10 is arranged above (upper) the mold 11, the mold clamping device 60 for opening and closing the mold 11, and the injection shaft. The main element is an injection device 40 in which 40a is vertical. The vertical injection molding device 10 is a general term for devices in which the mold opening / closing direction is vertically oriented. In this example, there are a plurality of mold clamping devices 60, but one mold clamping device 60 may be used. ..
The vertical injection molding apparatus 10 is appropriately covered with a safety door 12 and a safety cover 13.

The mold clamping device 60 and the injection device 40 are surrounded and supported by the device frame 20.
The device frame 20 includes a base frame 21, a first support column 22 and a second support column 32 rising from the base frame 21, and a top beam 36 connecting the upper end of the first support column 22 and the upper end of the second support column 32. There is.

A suitable detailed structure of the device frame 20 will be described with reference to FIG.
As shown in FIG. 2, the first support column 22 includes a first lower column 23 rising from the base frame 21 and a first upper column 24 rising from the first lower column 23, and the first lower column 23 and the first. The upper column 24 and the top beam 36 are separably fastened with bolts.
Similarly, the second support column 32 includes a second lower column 33 rising from the base frame 21 and a second upper column 34 rising from the second lower column 33, and the second lower column 33 and the second upper column 34. It is detachably fastened to the top beam 36 with a bolt.

In this example, the first lower column 23, the first upper column 24, the second lower column 33, and the second upper column 34 have a mouth shape in a side view, and the upper plate and the lower plate are respectively. Because it is equipped, it can be easily stacked like building blocks and the stacking order can be changed.
Further, the top beam 36 is provided with wire hooking portions 37 for hanging hanging wires at each of the four corners. The operation of the wire hooking portion 37 will be described later.

The injection device 40 shown in FIG. 1 is attached to the first upper column 24, and the first upper column 24 to which the injection device 40 is attached is attached to the lower plate 25 and the lower plate 25 as shown in FIG. It is composed of a vertical frame 26 extending upward and an upper plate 27 connecting the upper ends of these vertical frames 26.

As shown in FIG. 3, the injection device 40 attached to the first upper column 24 includes a lower end plate 41 fixedly supported by the vertical frame 26, a guide rod 42 extending upward from the lower end plate 41, and a guide rod 42. An upper end plate 43 fixed to the upper end of the guide rod 42, an injection table 44 movably attached to the guide rod 42, and an injection device moving cylinder 45 extending upward from the lower end plate 41 to support the injection table 44. A heating cylinder 46 extending downward from the center of the left and right sides of the injection table 44, a screw 47 rotatably housed in the heating cylinder 46 and movable along the injection shaft 40a, and a hydraulic pressure connected to the upper end of the screw 47. It includes a motor 48, a screw drive base 49 that supports the hydraulic motor 48, and an injection cylinder 51 that extends upward from the injection base 44 and supports the screw drive base 49.

The injection device moving cylinder 45 may have its piston rod extended upwards, and the injection cylinder 51 may have its mounting posture reversed so that its piston rods extend downwards.

The injection device moving cylinder 45 and the injection cylinder 51 are hydraulic cylinders in this example, but may be electric cylinders or pneumatic cylinders. The hydraulic motor 48 may also be an electric motor or a pneumatic motor.

Further, screw holes 53 for screwing the eyebolts 52 are provided at both ends of the upper plate 27, which is one of the components of the first upper column 24. How to use these screw holes 53 and eyebolts 52 will be described later.

The basic operation of the injection device 40 will be described.
Thermoplastic weighing process:
The hydraulic motor 48 supplies the resin material into the heating cylinder 46 while rotating the screw 47 in a predetermined direction. The resin material is guided by the screw 47 and accumulates in the lower part of the heating cylinder 46. The screw 47 rises due to the reaction force of the accumulated resin material. During this time, the resin material is agitated by the screw 47 and kneaded to raise the temperature and plasticize. Weighing ends when the screw 47 rises to the desired height. When the plasticizing weighing process is completed, the hydraulic motor 48 is stopped.

Injection device movement process:
The injection device moving cylinder 45 is contracted to lower the heating cylinder 46, the injection base 44, the injection cylinder 51, the hydraulic motor 48, and the screw drive base 49. When the nozzle 54 at the tip of the heating cylinder 46 touches the mold (FIG. 1, reference numeral 11), the injection device moving step is completed.

Injection process:
The injection cylinder 51 is contracted. Then, the screw 47 descends with respect to the heating cylinder 46. Due to this lowering, the resin material accumulated in the heating cylinder 46 is injected into the cavity of the mold through the nozzle 54.

As shown in FIG. 4, the mold clamping device 60 is connected to a mold clamping cylinder 62 extending downward from the turntable 61 on which the mold 11 shown by an imaginary line is placed, and a piston rod 63 of the mold clamping cylinder 62. Mainly, the pressure receiving plate 64, the tie bar 65 extending upward from the pressure receiving plate 64 while passing through the side of the mold clamping cylinder 62 and penetrating the turntable 61, and the movable plate 66 fastened to the upper ends of these tie bars 65. Cylinder.

Molding process:
The mold clamping cylinder 62 is extended. The pressure receiving board 64, the tie bar 65, and the movable board 66 are lowered. The mold 11 is clamped by the turntable 61 and the movable platen 66.

Mold opening process:
The mold clamping cylinder 62 is contracted. The pressure receiving board 64, the tie bar 65, and the movable board 66 are raised. The lower mold 11a remains, and the upper mold 11b goes up together with the movable platen 66. Since the mold 11 is opened, the molded product can be taken out. At this time, if the molded product is pushed up by the ejector 70, the molded product can be easily taken out.

In this example, the ejector 70 is provided below the center of the mold 11 in the width direction. On the other hand, in order to mold the mold 11 evenly, it is desired to arrange the mold clamping cylinder 62 below the center of the mold 11 in the width direction. The ejector 70 and the mold clamping cylinder 62 compete with each other in a so-called place, and countermeasures are required.

In the present invention, the following measures are taken.
Prepare two blocks 71 that are longer than the length of the cylinder portion of the ejector 70.
Then, a pair of left and right blocks 71 are attached to the upper end of the mold clamping cylinder 62 with bolts 72. Next, the block 71 was fixed to the turntable 61 with another bolt 73. A gap is secured between the block 71 and the ejector 70.

Since interference is avoided by the block 71, the center of the ejector 70 and the center of the mold clamping cylinder 62 can be arranged coaxially.
In this example, the ejector 70 and the mold clamping cylinder 62 are both hydraulic cylinders.

Further, it is desirable that the mold clamping device 60 is provided with a movable plate drop prevention mechanism 80 for preventing the movable plate 66 from falling. An example of a structure of the movable plate drop prevention mechanism 80 will be described.
The movable platen fall prevention mechanism 80 includes a rod 82 with a saw blade 81 extending downward from the movable platen 66 through the turntable 61, an air cylinder 83 fixed to the turntable 61, and a piston rod 84 of the air cylinder 83. It consists of a lock piece 85 attached to the tip of the. The lock piece 85 moves back and forth toward the rod 82 with the saw blade 81 by the air cylinder 83.

For example, when replacing the mold 11, the air cylinder 83 is extended and the lock piece 85 is inserted under one saw blade 81. In this state, even if the hydraulic pressure of the mold clamping cylinder 62 is released, one saw blade 81 is mounted on the lock piece 85, so that the movable platen 66 does not lower further. As a result, the inconvenient fall of the movable platen 66 is prevented.

Next, the procedure for rearranging the device frame 20 described with reference to FIG. 2 will be described with reference to FIGS. 5 to 6.
FIG. 5A is a front view of the device frame 20 when the machine is completed by the device manufacturer.
The height H1 of the device frame 20 is sufficiently large. Further, when the height dimension (length) of the first upper column 24 is h1 and the height dimension of the second upper column 34 is h2, h1 and h1 are set so that h2 = (1/2) × h1. h2 is set.

In preparation for shipment, as shown in FIG. 5B, the first upper column 24 is removed from the first lower column 23, and the top beam 36 is removed from the first upper column 24. The injection device 40 is not removed from the first upper column 24.
The second upper column 34 is removed from the second lower column 33, and the top beam 36 is removed from the second upper column 34.

As shown in FIG. 5C, a positioning pin 87 is interposed between the first lower column 23 and the lower plate 25 of the first upper column 24.
As shown in FIG. 5D, the positioning pin 87 includes a large-diameter pin 88 and a small-diameter pin 89 having a diameter smaller than that of the large-diameter pin 88. The small diameter pin 89 is arranged at an appropriate distance from the large diameter pin 88.

The positioning pin 87 is preferably an insertion pin that can be pulled out. The positioning pin 87 may be a cylindrical pin, a cylindrical pin, or a C-section cylindrical pin in which the cylinder is vertically split.
In FIG. 5B, the positioning pin 87 is pulled out and stored separately.

As shown in FIG. 6A, the second upper column 34 shown by the imaginary line is moved as shown by the arrow (1) and placed on the first lower column 23. Next, the top beam 36 is placed directly on the second lower column 33 (arrow (2)) and on the second upper column 34 (arrow (3)).
Next, the components are connected with bolts.

As shown in FIG. 6B, since the first upper column 24 to which the injection device 40 is attached was removed and the device frame 20 was rearranged, the height H2 of the device frame 20B after the rearrangement was lowered. That is, H2 was smaller by h2 than H1 shown in FIG. 5 (a). Further, the first upper column 24 is placed separately from the device frame 20B.

FIG. 7A shows the packing style (referred to as the first luggage 91) of the vertical injection molding apparatus. The height of the first luggage 91 is the same as the height of the apparatus frame 20B after the rearrangement, and is H2.
The first package 91 is provided with the wire hooking portion 37 to the top beam 36, you can hang a hanging wire 93 to the wire hook 37 facilitates slinging operations.

FIG. 7B shows the packing style of the first upper column 24 (referred to as the second cargo 92). The second luggage 92 is the first upper column 24 with the injection device 40 attached. The eyebolt 52 can be screwed into the upper plate 27 of the first upper column 24. By hanging the luggage fixing wire 94 on the screwed eyebolt 52, the cargo can be transported in an upright position.

For comparison, consider that the injection apparatus 40 and the first upper column 24, Ru aged. This is because it is easier to carry it if it is laid down.
However, when the injection device 40 shown in FIG. 3 is adjusted, laid down, transported, and stood at the delivery destination, the posture changes. When the posture is changed, it is assumed that the center of the heating cylinder 46 and the center of the screw 47 are deviated, or the contact between the guide rod 42 and the injection table 44 is changed. That is, a change in attitude requires a large-scale readjustment at the delivery destination.
In this respect, in the present invention, since the posture of the injection device 40 does not change, readjustment at the delivery destination is minor.

Needless to say, the height limit can be cleared because the vehicle is transported in the form of FIGS. 7 (a) and 7 (b).
By the way, as another measure to clear the height limit, there is a method of separating the components. However, if the components are separated, the number of shipping containers increases and the transportation cost increases.
In this respect, according to the present invention, the number of transportation containers can be reduced, and the transportation cost can be reduced.

After being delivered to the delivery destination, reassembly is performed in the order of FIG. 6 (b) → FIG. 6 (a) → FIG. 5 (b) → FIG. 5 (a) to obtain the vertical injection molding apparatus 10 shown in FIG. Be done.
At this time, due to the presence of the positioning pin 87 shown in FIG. 5C, the first upper column 24 can be accurately reassembled on the first lower column 23. Since the large-diameter pin 88 and the small-diameter pin 89 shown in FIG. 5D do not make a mistake in the orientation of the first upper column 24, the first upper column 24 can be quickly reassembled.

Further, the first luggage 91 shown in FIG. 7A is carried on a loading platform of a transportation means such as a truck in the direction shown in the figure. Since the posture of the mold clamping device 60 is the same as that in FIG. 1, there is no concern that the mold clamping device 60 described in detail in FIG. 4 will be out of order, and even if it does occur, it is minor.
Further, the second luggage 92 shown in FIG. 7B is also carried on a loading platform of a transportation means such as a truck in the direction shown in the figure. Since the posture of the injection device 40 is the same as that in FIG. 1, there is no concern that the injection device 40 described in detail in FIG. 3 will be out of order, and even if it does occur, it is minor.
As a result, the adjustment cost incurred at the delivery destination can be reduced.

Next, an example of modification of the present invention will be described with reference to FIG. FIG. 8A shows the device frame 20 at the end of adjustment, and FIG. 8B shows the packing style.
As shown in FIG. 8A, the apparatus frame 20 is different from FIG. 5A in that the length of the second upper column 34 is changed to h3 and h3 = h1. Others are the same as those in FIG. 5 (a), so the reference numerals in FIG. 5 (a) are used and the description thereof will be omitted.

As shown in FIG. 8B, the height of the apparatus frame 20C after rearrangement is H3. This height H3 is much lower than the original height H1. The first luggage 91 having the same height as the device frame 20C, the second luggage 92 including the first upper column 24 with the injection device 40, and the third luggage 95 consisting of the second upper column 34 are loaded. The figure is composed. The third luggage 95 may be carried by lying down.

In this modification, the injection device 40 does not necessarily have to be attached to the first upper column 24. Further, in FIG. 8A, the first upper column 24 may be divided into multiples, and the second upper column 34 may be divided into multiples. In short, it suffices if the height H1 in FIG. 8A can be restored after reassembly at the delivery destination.

The present invention is suitable for vertical injection molding equipment.

10 ... Vertical injection molding device, 11 ... Mold, 20 ... Device frame, 20B, 20C ... Device frame after rearrangement, 21 ... Base frame, 22 ... 1st support, 23 ... 1st lower column, 24 ... 1st Upper column, 27 ... upper plate, 32 ... second column, 33 ... second lower column, 34 ... second upper column, 36 ... top beam, 37 ... wire hook, 40 ... injection device, 40a ... injection shaft, 52 ... Eyebolt, 53 ... Screw hole, 60 ... Molding device, 87 ... Positioning pin, 88 ... Large diameter pin, 89 ... Small diameter pin, 91 ... 1st luggage, 92 ... 2nd luggage, 93 ... Hanging wire, 94 ... Luggage Fixed wire.

Claims (6)

A vertical injection molding device whose main elements are a mold, a mold clamping device for opening and closing the mold, and an injection device arranged on the mold clamping device and having a vertical injection shaft.
The mold clamping device and the injection device are surrounded and supported by a device frame.
The device frame includes a base frame, first and second columns rising from the base frame, and a top beam connecting the upper end of the first column and the upper end of the second column.
The first support column includes a first lower column rising from the base frame and a first upper column rising from the first lower column, and the first lower column, the first upper column, and the top beam are separated from each other. It is fastened with bolts as much as possible,
The second support column includes a second lower column rising from the base frame and a second upper column rising from the second lower column, and the second lower column, the second upper column, and the top beam are separated from each other. It is fastened with bolts as much as possible,
The injection device is attached to the first upper column.
A vertical injection molding apparatus, wherein the length of the second upper column is set to ½ of the length of the first upper column to which the injection apparatus is attached. The vertical injection molding apparatus according to claim 1.
The top beam is a vertical injection molding apparatus characterized in that a wire hooking portion for hanging a hanging wire is provided at one end and the other end. The vertical injection molding apparatus according to claim 1 or 2.
The first upper column has an upper plate extending horizontally at the upper end, and each end of the upper plate has screw holes for screwing eyebolts.
A vertical injection molding apparatus characterized in that the first upper column to which the injection apparatus is attached can be transported in an upright position by hooking a luggage fixing wire on the eyebolt. The vertical injection molding apparatus according to any one of claims 1 to 3.
The first upper column is a vertical injection molding apparatus characterized in that the first upper column is positioned on the first lower column by using a positioning pin. The vertical injection molding apparatus according to claim 4.
The positioning pin is a vertical injection molding apparatus comprising a large-diameter pin and a small-diameter pin having a smaller diameter than the large-diameter pin. The vertical injection molding apparatus according to claim 4 or 5.
A vertical injection molding apparatus, wherein the positioning pin is an insertion pin that can be pulled out from the first upper column and can be pulled out from the first lower column.

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