JPH07186211A - Center height adjustment of injection unit - Google Patents

Abstract

PURPOSE:To provide a method for adjusting a center height simply in a vertical injection molding machine. CONSTITUTION:A vertical injection-molding machine consists of a leveller 7 arranged on the base of an injection unit 3, with a formed contact surface of a jack 23. A level spacer is used for adjusting a center height which requires a significant adjustment. The injection unit 3 is uplifted by a jack 23 arranged between a floor surface and the contact surface of the base, and the level spacer is mounted between the leg of the leveller and the bottom surface of the base, or is removed to make a general adjustment. Then, a fine adjustment is performed using the leveller 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection axis of an injection unit in an injection molding machine (corresponding to a central axis of a nozzle hole).
A method for adjusting the height of the up and down.

[0002]

2. Description of the Related Art In an injection molding machine, it is necessary to adjust the center height so that the position of the nozzle of the injection unit is exactly aligned with the position of the sprue hole of the mold attached to the mold clamping unit. In this case, in the horizontal mold clamping / transverse injection molding machine, the mold clamping unit and the base of the injection unit are commonly integrated, and the mold clamping is performed even if the mold is replaced and the die height changes. Since the mold in the unit is designed so that the sprue hole is always in a fixed position, the adjustment amount required for the center height adjustment is small. For this reason, in a horizontal mold clamping / transverse injection molding machine, the tip of the nozzle is slightly moved up and down by an adjusting bolt provided at the front of the injection unit.

On the other hand, in the case of a so-called vertical injection molding machine 1 (FIG. 5) of vertical clamping / lateral injection, the mold clamping unit 2 is usually used.
The injection unit 3 and the injection unit 3 are separate and one mold clamping unit 2
On the other hand, the injection unit 3 can be freely combined and combined, and the injection to the mold 4 is a parting line injection performed from the joint surface of the movable side mold 4a and the fixed side mold 4b. , A relatively large center height adjustment is required every time the mold 4 is replaced. In FIG. 5, reference numeral 5 is the nozzle, pp line is the injection axis line, and reference numeral s is the position of the sprue hole in the parting line of the mold 4.

The center height (h) in the vertical injection molding machine 1 is conventionally adjusted by a screw type leveler 6, which is provided on the bottom surface of the bases (2a, 3a) of both the mold clamping unit 2 and the injection unit 3. 7 is adjusted, but the required adjustment amount is about 10 in a molding machine with a mold clamping force of 50t.
Although it may reach 0 mm, the adjustment amount of the levelers 6 and 7 is only 1-1.7 mm per revolution (screw pitch).
The adjustment work is very tedious and time consuming. Further, conventionally, the adjustment of the center height needs to be performed after completely uncoupling the mold clamping unit 2 and the injection unit 3, and it takes time to remove and attach the coupling member 8.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an adjusting method capable of more easily adjusting the center height in a vertical injection molding machine.

[0006]

A center height adjusting method for a vertical injection molding machine in which a leveler is arranged on a base of an injection unit and a contact surface of a jack is formed. A level spacer will be used for adjustments that require a large amount of center height adjustment. A jack placed between the floor surface and the contact surface of the base lifts the injection unit and attaches or removes a level spacer between the leg of the leveler and the bottom surface of the base to perform a rough adjustment.
Then, fine adjustment is performed by the leveler.

It is preferable to have the following configuration. Use split level spacers. The injection unit and the mold clamping unit are separated, and the injection unit and the mold clamping unit are fixed from one base to the other by screwing the bolts that penetrate the vertical holes in the one base. It is applied to the adjustment of the center height of the vertical injection molding machine that is connected by.

[0008]

[Function] By using the level spacer, a large amount of adjustment of the center height can be adjusted substantially quickly.
By using a leveler, the center height can be finely adjusted.

[0009]

FIG. 1 shows a vertical injection molding machine 1 to which the center height adjusting method of the present invention can be applied, which is composed of a vertical mold clamping unit 2 and a horizontal injection unit 3. A mold 4 is attached to the mold clamping unit 2, and the injection unit 3 is inserted into the sprue hole s of the parting line.
Nozzle 5 is abutted.

The base 2a of the mold clamping unit 2 is provided with levelers 6 at the four corners of the bottom surface so that the vertical position and tilt can be finely adjusted independently. Base 3 of injection unit 3
Similarly, a also has levelers 7 at the four corners of the bottom surface, and fine adjustment of the vertical position and inclination is possible independently. Further, a step portion 9 (FIG. 2) is formed on the bottom surface of the base 3a of the injection unit 3 in the front and back, and the upper surface thereof is a contact surface 10.

The levelers 6 and 7 have the same structure. As shown in FIG. 1, a screw rod 14 of a leg 13 vertically penetrates a nut 12 fixed to a base plate 11 of a base (2a, 3a) and screwed. Has been done. When the leg 13 is rotated, the center height (h) can be adjusted by the pitch (1.5 mm) of the screw rod 14 for each rotation.

A flange 16 is formed on a surface of the base (3a) of the injection unit 3 facing the mold clamping unit 2. A bolt 18 is passed through a through hole 17 formed in the flange 16 in the vertical direction. By screwing the bolt 18 into the tap hole 19 in the facing surface 15 of the mold clamping unit 2, the injection unit 3 is inserted into the mold clamping unit 2.
Are combined. The size of the through hole 17 in the vertical direction is designed to be slightly larger than the required adjustment amount expected for the mold 4 to be used. Reference numeral 20 is a seat plate.

In FIG. 1, it is assumed that the mold 4 is replaced and the position of the sprue hole s is raised by 63 mm. The position of the injection axis line pp on the injection unit 3 side is raised, that is, the center height (h) is adjusted. The required adjustment amount of 63 mm is large, and the adjustment by the levelers 6 and 7 requires a considerable amount of work. The adjustment is carried out as follows by implementing the method of the present invention.

Loosen the bolts 18 fixing the injection unit 3 to the mold clamping unit 2 so that the bolts 18 are elongated holes 17
The inside is ready to move up and down. Thickness is 2
Three 0 mm level spacers 21 (Fig. 4) are prepared. At one of the four corners of the base 3 a, a jack 23 is arranged between the floor surface 22 and the contact surface 10 of the base 3 a of the injection unit 3.

The jack 23 is operated to lift the injection unit 3, and one level spacer 21 is mounted between the leg 13 of the leveler and the bottom surface of the base 3a. The level spacer 21 has a U-shape in which a communication hole is formed from the outer periphery toward the hole through which the central screw rod 14 penetrates, and can be mounted to the screw rod 14 from the side.

The same operation is repeated for the four corners, and the entire injection unit 3 is lifted by 20 mm. Then, in the same manner, lift the entire injection unit 3 by 20 mm, and finally,
The three level spacers 21 are sandwiched between the leveler legs 13 and the bottom surface of the base 3a. 2 legs at each of the four corners
Rotate and fine-tune the remaining 3 mm.

When the sprue position s becomes low, the level spacer 21 may be removed to make a rough adjustment. Further, the reason for lifting by 20 mm is to avoid an accident in which the injection unit 3 falls due to a sudden lifting.

Finally, the bolt 18 is screwed in to fix the injection unit 3 to the mold clamping unit 2. The bolt 18 is simply loosened and tightened, and this work is easy. The above is an example, the present invention is illustrated,
It is not limited to the specific configuration described. The thickness and shape of the level spacer 21 are arbitrary. A small hydraulic jack is suitable for the jack to be used, but a hand lifter can also be used. However, when other equipment is arranged around the vertical injection molding machine, there may be no room to bring in the hand lifter. The height on the mold clamping unit side (height of the sprue hole s) may be adjusted, but when a plurality of injection units 3 are arranged in one mold clamping unit 2 (vertical type), a plurality of injection axis lines The height of the sprue hole s may be adjusted to p-p, which may make adjustment difficult.

[0019]

The center height adjustment in the vertical injection molding machine can be performed quickly and easily. In a molding machine in which the mold clamping unit and the injection unit are coupled by bolts through vertical slots, the center height adjustment is ready just by loosening the bolts.

[Brief description of drawings]

1] Front view

FIG. 2 is an exploded perspective view

FIG. 3 is a front view showing an enlarged main part (before adjustment).

FIG. 4 is a front view showing an enlarged main part (after adjustment).

FIG. 5 is a front view (conventional example).

[Explanation of symbols]

 1 Vertical injection molding machine 2 Mold clamping unit 3 Injection unit 4 Mold 5 Nozzle 6 Leveler (mold clamping unit side) 7 Leveler (injection unit side) 8 Joining member 9 Step part 10 Contact surface 11 Board 12 Nut 13 Leg 14 Screw Rod 15 Opposing surface (mold clamping unit side) 16 Flange (injection unit side) 17 Long hole 18 Bolt 19 Tap hole 20 Seat plate 21 Level spacer 22 Floor surface 23 Jack

Claims (3)

[Claims] 1. A vertical injection molding machine in which a leveler is arranged on a base of an injection unit and a contact surface of a jack is formed, and a level spacer is used for adjustment in which a large adjustment amount of a center height is required, A jack placed between the floor surface and the contact surface of the base lifts the injection unit, attaches or removes a level spacer between the leg of the leveler and the bottom surface of the base, and then roughly adjusts, then finely adjusts with the leveler. Adjusting the center height of the injection unit. 2. The center height adjusting method for an injection unit according to claim 1, wherein a plurality of divided level spacers are used. 3. The injection unit and the mold clamping unit are separated from each other, and the injection unit and the mold clamping unit are provided with bolts penetrating from one base to the other through vertical slots formed in the one base. The method for adjusting the center height of an injection unit according to claim 1 or 2, wherein the method is applied to a vertical injection molding machine that is coupled by being screwed and fixed.