JP2000313028A - Injection molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and safely conduct disassembling and cleaning by arranging a shaft rotatably supporting member for rotatably supporting a cylinder unit around a substantially horizontal shaft between an injection molding machine body and the cylinder unit. SOLUTION: Two struts 2, 3 are mounted parallel to one another and substantially perpendicularly on a pedestal 1, a drive unit 20 is provided from above toward down to the struts 2, 3, and a cylinder holder 4 is arranged at a lower side of the unit 20. The holder 4 has two cylindrical members 41, 42, and a connecting member 43 for connecting both at upper portions of the members 41, 42. A cylinder unit 30 is arranged between the members 41 and 42. Hinges 31, 35 are mounted as shaft rotatably supporting members for rotatably supporting the unit 30 around a substantially horizontal shaft at a slightly lower portion from a center of a vertical direction of the unit 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding apparatus, and more particularly to an injection molding apparatus, in which a screw is moved in a substantially vertical direction to discharge a molding material contained in a cylinder in a substantially vertical direction.
The present invention relates to a so-called vertical discharge type injection molding apparatus.

[0002]

2. Description of the Related Art Conventionally, when injection molding is performed using a thermosetting liquid silicone resin, an injection molding apparatus for a thermoplastic resin is often used as it is.

FIG. 5A shows a typical vertical injection molding apparatus 1.
00 is shown schematically.

In this injection molding apparatus 100, a pedestal 101
Two pillars 102 and 10 extending upward in a direction substantially parallel to the vertical direction
The cylinder holder 140 is disposed over these columns 102 and 103, and a drive unit 120 for driving the screw 110 is disposed above the cylinder holder 140. To the cylinder holder 140, a cylinder unit 130 that accommodates an injection material and ejects after mixing is attached. A screw 110 is accommodated in the cylinder unit, and the screw 110 is rotated in the cylinder unit 130 to mix a composition mainly composed of a liquid silicone resin composed of two components, a liquid A and a liquid B, This screw 1
As the 10 moves up and down in a substantially vertical direction, the mixed composition is discharged toward a mold (not shown) from a nozzle 131 disposed at the tip of the cylinder unit 130.

FIG. 5B is a view showing a state in which the cylinder unit 130 has been removed from the cylinder holder 140. As shown in FIG. 5B, the cylinder unit 13
Numeral 0 is fixed to a cylinder holder 140 via a fixing block 150, and the cylinder unit 130 is attached to the cylinder holder 140 via a fixing ring 160.

When injection molding is performed using a liquid silicone resin, the reaction is slightly started in a state of being mixed and accommodated in the cylinder of the cylinder unit 130. Therefore, the composition which is fixed to the inner wall surface of the cylinder and reduces the amount of the composition contained in the cylinder, or a composition in which the partially reacted silicone resin is mixed into the unreacted resin composition and injected into the mold There is a risk that the quantity and quality of the goods will fluctuate.

In order to prevent this, when injection molding liquid silicone resin, it is necessary to clean the inside of the cylinder at regular intervals.
It is necessary to take 10 out of the cylinder unit 130.

[0008]

However, in the case of a thermoplastic resin, the screw 110 is connected to the cylinder unit 13.
Cleaning can be performed with the cylinder unit 1 installed.
Since the disassembly and cleaning of 30 is hardly necessary, the injection molding apparatus 100 for general-purpose resin does not have a structure with disassembly and cleaning in mind.

Therefore, when an apparatus such as an injection molding apparatus for a thermoplastic resin is used for injection molding of a silicone resin, it has to be disassembled every time cleaning is performed, which requires considerable time, labor and cost. Was. In that case, 40
This was a dangerous operation that required removal of the cylinder unit 130 weighing from 0 to 500 kg and requiring a plurality of personnel. Furthermore, when the color of the pigment used is changed, or when the composition is cured in the cylinder, it is necessary to call a worker from the equipment manufacturer one by one, which is inefficient and increases costs. Was.

The present invention has been made to solve the above-mentioned conventional problems. That is, an object of the present invention is to provide an injection molding apparatus capable of easily and safely performing disassembly and cleaning.

[0011]

In order to achieve the above object, an injection molding apparatus according to the present invention includes an injection molding apparatus main body provided with a driving means for driving a screw to rotate in a substantially vertical axial direction; A cylinder unit detachably mounted on the injection molding apparatus main body, and a cylinder unit disposed between the injection molding apparatus main body and the cylinder unit, and rotatably supporting the cylinder unit around a substantially horizontal axis. And a shaft support member.

In the above-described injection molding apparatus, the main body of the injection molding apparatus means a counterpart to which the cylinder unit is attached, for example, a cylinder holder for attaching the cylinder unit to a column.

[0013] As the shaft support member, for example, a main body side hinge member provided on the injection molding apparatus main body side, a main body side hinge member provided on the cylinder unit side, and rotatably fitted to the main body side hinge are provided. And a cylinder-side hinge member.

The injection molding apparatus may further include fixing means for fixing the cylinder unit in a substantially horizontal state. The fixing means may be provided on the shaft support member. For example, as the fixing means, a through hole formed in the main body side hinge member substantially horizontally, and a through hole formed substantially horizontally in the cylinder side hinge member,
And a locking rod slidably disposed in the two through holes and provided at a position facing the through hole when the cylinder unit is substantially horizontal.

The injection material injected from the cylinder unit toward the mold includes a composition containing a thermosetting liquid silicone resin as a main component.

In the injection molding apparatus according to the present invention, the cylinder unit can be rotated about a substantially horizontal axis via the shaft support member, and the cylinder unit can be set to a substantially horizontal state. As you can remove the screw stored in and clean the inside of the cylinder,
The disassembly and cleaning can be easily and safely performed by a small number of people in a short time.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An injection molding apparatus according to one embodiment of the present invention will be described below. FIG. 1 is a front view of an injection molding apparatus according to an embodiment of the present invention. As shown in FIG. 1, in this injection molding apparatus, two columns 2 and 3 are mounted on a pedestal 1 so as to be substantially perpendicular to each other in parallel with each other. Toward, the drive unit 20 and the cylinder holder 4 are attached.

The drive unit 20 includes a screw 1 to be described later.
A hydraulic cylinder C for raising and lowering the screw 10 is disposed at the top, and a metering drive M for applying a rotational driving force to the screw 10 is disposed below the hydraulic cylinder C. Has been established. This metering drive M
Is mounted slidably in the vertical direction with respect to the columns 2 and 3 via a support base 22, and is connected to the above-described hydraulic cylinder C via a shaft 21 having a rotary shaft extending from the hydraulic cylinder C. ing.

The cylinder holder 4 is disposed below the drive unit 20. This cylinder holder is
3 includes two cylindrical members 41 and 42 coaxially surrounding the outer peripheral surface of the third member 3, and a connecting member 43 connecting the two at the upper portions of the cylindrical members 41 and 42.

The cylindrical members 41, 42 are respectively supported by columns 2, 3,
Is mounted so as to be able to move up and down by a hydraulic mechanism (not shown), so that the entire cylinder holder 4 moves up and down with respect to the columns 2 and 3.

The cylinder unit 30 is disposed between the cylindrical member 41 and the cylindrical member 42. The upper end of the screw 10 housed in the cylinder unit 30 is connected to the above-mentioned metering drive M. Have been.

A fitting portion (not shown) for fitting with the cylinder holder 4 is provided at an upper end portion of the cylinder unit 30, and a thread is formed on an outer periphery of a portion beyond the fitting portion.

The cylinder unit 30 is mounted on the cylinder holder 4 by fitting a fitting portion at an upper end of the cylinder unit 30 into a fitting groove provided at a central portion of the connecting member 43 in the left-right direction in the drawing. This is performed by fastening the fixing rings 45 and 46 to the threads at the tips protruding to the upper part of the connecting agent 43 and further screwing the fixing block 44 from above the connecting member 43.

Hinges 31 and 35 as pivot members are attached to a portion slightly below the vertical center of the cylinder unit 30.

FIG. 2 shows the hinge 3 of the cylinder unit 30.
It is the figure which expanded the 1,35 attachment part as a partial perspective view. As shown in FIG. 2, a hinge 31 is provided between the cylinder unit 30 and the tubular member 41, and a hinge 35 is provided between the cylinder unit 30 and the tubular member 42. The hinge 31 is a cylinder side hinge member 32
And the body side hinge member 33 are rotatably mounted via a shaft member 34. Similarly, the hinge 35 is such that a cylinder side hinge member 36 and a support side hinge member 37 are rotatably mounted via a shaft member 38. ing. For this reason, the cylinder unit 30 can rotate on a vertical plane (a plane perpendicular to the paper) with a straight line connecting the shaft member 34 and the shaft member 38 as a substantially horizontal axis.

Next, a procedure for disassembling and cleaning the injection molding apparatus will be described. FIG. 3 is a diagram schematically illustrating a state when the injection molding apparatus is disassembled and cleaned.

To remove the screw 10 from this injection molding apparatus, first remove the screw 10 from the metering drive M, and connect the upper end of the screw 10 to the metering drive M.
Separate from Next, the fixing rings 45 and 46 are loosened and removed, and then the bolts fixing the fixing block 44 are removed to remove the fixing block 44. When the fixing rings 45 and 46 and the fixing block 44 are removed in this manner, the cylinder unit 30 can rotate in a plane perpendicular to the paper surface with the hinges 31 and 35 as fulcrums. Then, when the cylinder unit 30 is gently pulled toward the near side, for example, the cylinder unit 30 falls down toward the near side, and is gently tilted. FIG. 3 shows a state in which the cylinder unit 30 is tilted down and kept substantially horizontal when viewed from the side, and FIG. 4 is a partially enlarged view when the state is viewed from directly above.

In this injection molding apparatus, the locking rod R is attached to the hinge 35 as shown in FIG. 4, so that the cylinder 30 is lowered until it becomes substantially horizontal as shown in FIG. By the way it can be fixed.

That is, as shown in FIG. 4, through holes h1 and h2 are formed between the hinge member 36 on the cylinder side and the hinge member 37 on the main body side of the hinge 35. It is arranged at a position where it faces when it is horizontal. As described above, when the cylinder unit 30 is kept substantially horizontal and the rod-shaped locking rod R is slid in a state where the two through holes h1 and h2 are aligned and opposed to each other, the locking rod R becomes two through holes. h1, h
2, the cylinder side hinge member 36 and the main body side hinge member 37 are fixed, and the hinge 35 does not move. By sliding the locking rod R in this manner, the hinge 35 is fixed, and the cylinder unit 30 is held in a substantially horizontal state.

With the cylinder unit 30 fixed substantially horizontally as described above, the screw 10 is withdrawn from the inside of the cylinder unit 30 and necessary cleaning is performed on the inner wall surface of the cylinder of the cylinder unit 30, the nozzle at the tip, and the screw 10 withdrawn. .

As described in detail above, in the injection molding apparatus of the present invention, the cylinder unit 3
0 is rotatably supported in a substantially vertical plane, so when removing the screw 10 for disassembly and cleaning, the cylinder unit 30 should be lowered to a substantially horizontal state without being removed from the cylinder holder 4. Can be. Therefore, it is possible to save the trouble of removing the cylinder unit 30 having a considerable weight, so that the screw 10 can be easily and safely removed in a short time.

Further, since the angle of the cylinder unit 30 is changed by utilizing the principle of leverage, the work can be performed with a small force, so that only one worker can work. Also,
It can be easily and safely disassembled and installed, so no special skilled skills are required and the work can be done only by the user.

The present invention is not limited to the above embodiment. Therefore, for example, in the above embodiment, the hinge 3
5 as the fixing means for fixing the cylinder-side hinge member 3
6 and a through hole h at a position facing the main body side hinge member 37.
1, h2 is provided, and the hinge 35 is fixed by locking the rod-shaped locking rod R in the through holes h1, h2, but other fixing means may be used. Further, the fixing means itself may be omitted.

Further, the injection molding apparatus of the present invention is a general-purpose resin other than a resin containing a thermosetting liquid silicone resin as a main component,
Needless to say, it can be used for molding vinyl chloride, for example.

[0035]

According to the injection molding apparatus of the present invention, the cylinder unit can be rotated about a substantially horizontal axis via the shaft supporting member, and the cylinder unit can be made substantially horizontal. Since the screw contained inside can be pulled out and the inside of the cylinder can be cleaned, disassembly and cleaning can be performed easily and safely, and in a short time with a small number of people.

[Brief description of the drawings]

FIG. 1 is a front view of an injection molding apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged view showing a hinge mounting portion of the cylinder unit as a partially transparent view.

FIG. 3 is a diagram schematically illustrating a state when the injection molding apparatus is disassembled and cleaned.

FIG. 4 is a partially enlarged view of a state in which the cylinder unit is fixed horizontally, as viewed from directly above.

FIG. 5 is a diagram showing an entire configuration of a conventional injection molding apparatus.

[Explanation of symbols]

 10: Screw, 4: Cylinder holder (injection molding apparatus main body), 30: Cylinder unit, 31: Hinge (shaft support member), 35: Hinge (shaft support member), R: Locking rod ( Fixing means), h1 ... through-hole (fixing means), h2 ... ... through-hole (fixing means).

Claims (4)

[Claims] 1. An injection molding apparatus main body provided with a driving means for driving a screw to rotate in a substantially vertical axial direction, a cylinder unit including the screw therein and disposed detachably from the injection molding apparatus main body; A shaft support member disposed between the injection molding apparatus main body and the cylinder unit, the shaft support member rotatably supporting the cylinder unit around a substantially horizontal axis. apparatus. 2. The injection molding apparatus according to claim 1, further comprising fixing means for fixing said cylinder unit in a substantially horizontal state. 3. The injection molding apparatus according to claim 2, wherein the shaft support member is disposed on a main body side hinge member disposed on the injection molding apparatus main body side, and on the cylinder unit side, The main body side hinge comprises a cylinder side hinge member rotatably fitted to the main body side hinge member, wherein the fixing means comprises a through hole formed substantially horizontally in the main body side hinge member, and a substantially horizontal hole formed in the cylinder side hinge member. A formed through hole, a through hole provided at a position facing the through hole when the cylinder unit is substantially horizontal, and a locking rod slidably disposed in the two through holes. An injection molding apparatus comprising: 4. The injection molding apparatus according to claim 1, wherein the injection material injected from the cylinder unit is a composition containing a thermosetting liquid silicone resin as a main component. An injection molding apparatus characterized by the above-mentioned.