JP3264817B2 - Injection molding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to relates to an injection molding machine, such as in-line screw type injection molding machine.

[0002]

2. Description of the Related Art In an injection molding machine of an in-line screw type or the like, when cleaning the inside of a heating cylinder, nozzles, screws, etc., or replacing nozzles, screws, etc., these maintenance operations are performed efficiently. Then, the injection unit is turned.

The injection unit includes a heating cylinder having a built-in screw, a rotation drive source for the screw, an injection drive source (a forward / reverse drive source for the screw), a headstock having a hopper attached thereto, and a nozzle touch cylinder (for the entire injection unit). (A driving source for moving forward and backward) and the like, the injection unit is heavy. For this reason, some small and lightweight machines (injection molding machines) have a configuration in which the injection unit is manually swung while directly dragging it. A configuration with a drive source such as a hydraulic cylinder. A configuration in which the injection unit is turned by increasing the rotational force of a manually operated handle by utilizing a screw feed action of a ball screw or the like. A configuration in which the lever of the lever type is used to increase the force of manual operation to rotate the injection unit. Often take.

[0004]

However, when the above configuration is adopted, a driving source such as an expensive hydraulic cylinder is required, which leads to an increase in cost and an entire mechanism for turning. It is large and bulky.

[0005] In addition, in the case of adopting the above-mentioned configuration, the turning feed mechanism using a ball screw or the like is relatively expensive, leading to an increase in cost, and the entire turning mechanism is complicated and bulky. Further, the operation of turning the injection unit by operating the handle is complicated.

In addition, in the case of the above-described configuration, it is difficult to secure a space for installing a lever-type lever, which hinders the degree of freedom of design and causes the entire mechanism for turning. There is a limit to miniaturization. Furthermore, even though the leverage force is used, there is a limit to the degree of increase in the force due to space factor restrictions, and it takes a lot of force to rotate the injection unit. It becomes troublesome.

[0007] Therefore, a technical problem to be solved by the present invention is to solve the above-mentioned problems of the prior art, and an object thereof is to provide a simple and compact mechanism for rotating an injection unit. An object of the present invention is to provide an injection molding machine which can be realized, can achieve cost reduction and downsizing, and can easily and reliably rotate an injection unit.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an injection molding machine in which an injection unit is pivotable by a predetermined amount in a horizontal direction with respect to a machine base member. A pedestal member provided to be pivotable by a predetermined amount in the horizontal direction with respect to the machine base member; and a pivotally supported by the pedestal member, the lowermost end of which is positioned below the bottom surface of the pedestal member. Roller member, and a slide plate member which is capable of entering and exiting a notch having an upper bottom surface provided on the lower surface side of the pedestal member as a tapered portion, and having a tapered portion corresponding to the tapered portion of the pedestal member on its upper surface, With the slide plate member fitted in the notch of the pedestal member, the slide plate member lifts the lowermost end of the roller member with respect to the machine base member. In addition, while supporting the injection unit via the pedestal member and pulling out the slide plate member from the notch in the pedestal member, the roller member lands on the machine base member and directs the injection unit with the pedestal member manually. It is configured so that the turning operation is possible.

That is, when the lock to the slide plate member by the appropriate fixing means is released, and then the slide plate member is pulled out from the notch of the base member, the roller member attached to the base member is placed on the machine base member. Land. Also at this time, the bottom surface of the pedestal member is separated from above the machine base member, and therefore, the pedestal member and the injection unit carried thereon are in a state of being mounted on the machine base member via the roller member, By simply rotating the injection unit directly and manually, the rotation of the roller member makes the injection unit easy together with the base member.
The turning movement is ensured.

[0010]

Embodiments of the present invention will be described below. FIGS. 1 to 4 show an embodiment of the present invention (hereinafter, referred to as an embodiment).
1 is a front view of a main part of an injection molding machine mainly showing a configuration of an injection mechanism, FIG. 2 is an enlarged front view of a main part of FIG. 1, and FIG. 3 is a left side view of a main part of FIG. FIG. 4 and FIG. 4 are explanatory views showing the state where the injection unit is turning, as viewed from above.

First, an outline of the configuration of the injection system mechanism will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes a machine base, on which an injection mechanism and a mold opening / closing mechanism are mounted, and in FIG. 1, the mold opening / closing mechanism constitutes a part of the mold opening / closing mechanism. Only the fixed die plate 2 is shown.

Reference numerals 1a and 1b denote pedestal receiving plates constituting a part of the machine base 1. On one of the pedestal receiving plates 1a, a first pedestal member 3 rotates by a predetermined amount about a support shaft 4 as a rotation center O. Installed as possible. Further, on the other pedestal receiving plate 1b, the second pedestal member 5 is provided with the rollers 14,
16 so as to be capable of turning (rotating) by a predetermined amount. The first pedestal member 3 and the second pedestal member 5 are integrally connected via a connection bar 6,
The second pedestal member 5 also uses the support shaft 4 as the rotation center O,
The pedestal member 3 is pivotally moved by the same angle as the rotation angle.

The first pedestal member 3 and the second pedestal member 5
Are formed at the upper part thereof, a slide bar 7 as a base member of the injection unit U is slidably mounted on the slide receiving seats 3a, 5a (see FIG. 3). In this example, the slide receiving portion 3
a and 5a are provided as a pair, and two slide bars 7 are mounted. (See FIG. 3). Each component of the injection unit U is directly or indirectly mounted on the slide bar 7.

The components of the injection unit U in this embodiment include, besides the slide bar 7, a headstock 8 having a hopper (not shown) attached thereto, a heating cylinder 9 having a rear end attached to the headstock 8, and a heating cylinder 9 , A screw (not shown) built in the heating cylinder 9, a hydraulic motor 11 as a rotational drive source of the screw, and an injection cylinder (hydraulic cylinder) as an injection drive source (a forward and backward drive source of the screw) ) 1
2, a nozzle touch cylinder (hydraulic cylinder) 13 and the like are included. In the operating state, the tip of the piston rod of the nozzle touch cylinder 13 is fixed to the fixed die plate 2, and the injection unit U is driven forward by the driving of the nozzle touch cylinder 13 (the slide bar 7 is moved to the slide receiving seat). Parts 3a, 5a
The nozzle 10 is pressed against the resin inlet of the mold (driven forward). Note that the components of the injection unit U are not limited to the above-described example, and may have various modifications.

FIG. 2 is an enlarged view showing a configuration near the second pedestal member 5. As shown in FIG. As shown in the drawing, a notch 5b having a tapered portion 5b-1 at the upper bottom surface is formed on the lower surface side of the second pedestal member 5. On the left side of the second seat member 5, two rollers 14, 14 are rotatably held via a support shaft 15 (see FIG. 3).
A roller 16 is rotatably held on a right side surface of the member by a support shaft 17. The rollers 14 and 16 ensure smooth rotation using ball bearings, and the lowermost ends of the rollers 14 and 16 are connected to the second pedestal member 5.
Is set to be slightly below (in this example, about 0.5 mm below) the bottom surface of.

Reference numeral 18 denotes a slide plate member, the wedge plate portion 18a of which can enter and exit the notch 5b of the second pedestal member 5, and the upper surface of the wedge plate portion 18a has a tapered portion 5b of the notch 5b. -1 is formed on the tapered portion 18a-1 having an inclination corresponding to -1. When the wedge plate portion 18a of the slide plate member 18 is fitted into the notch 5b of the second pedestal member 5 by a predetermined amount as shown by a solid line in FIG. 2
The pedestal member 5 is slightly pushed up to form a predetermined gap A between the bottom surface of the second pedestal member 5 and the upper surface of the pedestal receiving plate 1b. A predetermined amount of gap B is formed between the upper surface of the plate 1b. The relationship between the gaps A and B is such that A> B. In this example, A is set to about 1 mm and B is set to about 0.5 mm.

Therefore, as shown by the solid line in FIG.
The wedge plate portion 18a of the slide plate member 18 is
In a state where the base member 5 is fitted into the notch 5b by a predetermined amount, the holding of the second base member 5 is left to the slide plate member 18, and the load from the injection unit U is reduced by the second base member 5 Through the slide plate member 18
Is to receive.

When the wedge plate portion 18a of the slide plate member 18 slides out of the notch 5b of the second pedestal member 5 as shown by a two-dot chain line in FIG.
The second pedestal member 5 is slightly displaced downward by the load of the second pedestal member and the injection unit U so that the rollers 14 and 16 land (abut) on the pedestal receiving plate 1b.

Therefore, as shown by a two-dot chain line in FIG. 2, when the wedge plate portion 18a of the slide plate member 18 comes out of the notch 5b of the second pedestal member 5, the second pedestal member 5 and the Of the injection unit U is entrusted to the rollers 14 and 16, and in this state, only by manually turning the injection unit U, the second
The pedestal member 5 rotates around the rotation center O by the rotation of the rollers 14 and 16, and the injection unit U also rotates around the rotation center O integrally therewith.

Reference numeral 19 denotes a height adjusting bolt of the injection unit U screwed to the left side surface of the second pedestal member 5, and a vertical portion 18b of the slide plate member 18 is attached to the head of the height adjusting bolt 19. The notch 5
The amount of entry of the wedge plate portion 18a into b is defined. Therefore, by adjusting the amount of protrusion of the height adjusting bolt 19, the slide plate member 1 is adjusted.
8, the height of the injection unit U (that is, the height of the nozzle 10) can be finely adjusted via the second pedestal member 5.

Reference numeral 20 designates a planting and mounting member on the left side of the second pedestal member 5.
In the fixed screw shaft, a through hole 18 through which the screw shaft 20 can pass is formed in the vertical portion 18 b of the slide plate member 18.
b-1 is drilled. Then, with the vertical portion 18b of the slide plate member 18 being in contact with the height adjusting bolt 19, the vertical portion 18b is sandwiched by the fastening nuts 21 and 21 screwed to the screw shaft 20. With such fastening, the slide plate member 18 is integrated with the second pedestal member 5 in a correct positional relationship.

Reference numeral 22 denotes a fixing bolt for fixing and positioning the second pedestal member 5 and the slide plate member 18 with respect to the pedestal receiving plate 1b (machine base 1). Second in position
The pedestal member 5 and the slide plate member 18 are positioned in an immobile state. That is, in the normal state, as shown by the solid line position in FIG. 2, the tip of the fixing bolt 22 penetrating the second pedestal member 5 is inserted into the hole 18 a-formed in the wedge plate 18 a of the slide plate member 18.
The second pedestal member 5 and the slide plate member 18 are fastened by fastening the fixing bolt 22 so as to press against the second pedestal member 2.
Is fixed to the pedestal receiving plate 1b.

Next, the operation of this embodiment based on the above-described configuration will be described. In a normal state such as the operation state of the machine, the axis of the injection unit U coincides with the mold opening / closing direction. At this time, the second pedestal member 5 is provided on the pedestal receiving plate 1b as shown in FIG. It is positioned in contact with the turning stopper bolt 23 screwed to the vertical piece, and the configuration near the second pedestal member 5 is in the state shown by the solid line in FIG.

When it becomes necessary to turn the injection unit U for maintenance from the above-mentioned positional relationship, first, the fixing bolt 22 is loosened and pulled upward as shown by the arrow in FIG. 20,2
Then, the wedge plate portion 18a of the slide plate member 18 is removed from the notch 5b of the second pedestal member 5 as indicated by an arrow in FIG. Thereby, as described above, the rollers 14 and 16 supported by the second pedestal member 5 land on the pedestal receiving plate 1b. In this state, as described above, the second pedestal member 5 and the injection unit U thereon
Is entrusted to the rollers 14 and 16, and therefore, only by manually turning the injection unit U, the second
The pedestal member 5 rotates around the rotation center O by the rotation of the rollers 14 and 16, and the injection unit U also rotates integrally therewith. At this time, as described above, the first pedestal member 3 also rotates by the same angle on the pedestal receiving plate 1a in synchronization with the rotation of the injection unit U. The sliding amount is small,
The resistance due to the sliding load is small.

FIG. 4 shows the state of the above-mentioned turning operation. The injection unit U turns around the rotation center O from the position shown by the two-dot chain line to the position shown by the solid line in FIG. For example, the roller 16 comes into contact with the turning stopper bolt 24 screwed to the pedestal receiving plate 1b, whereby further turning operation is restricted. In this example, the swivelable angle θ of the injection unit U
Is set to θ = 17 °, but the setting angle of θ is arbitrary.

When returning the injection unit U to the original position,
The injection unit U is turned from the position shown by the solid line in FIG. 4 to the position shown by the two-dot chain line, and the second pedestal member 5 is brought into contact with the turning stopper bolt 23 to be positioned at the expected position. Next, the wedge plate portion 18a of the slide plate member 18 is pushed into the notch 5b of the second pedestal member 5, so that the rollers 14, 16 are raised from the pedestal receiving plate 1b, and the vertical portions 18b of the slide plate member 18 are raised. Is brought into contact with the height adjusting bolt 19. Thereafter, the tightening nuts 21 and 2 screwed to the screw shaft 20 are provided.
The slide plate member 18 is integrated with the second pedestal member 5 by fastening the vertical portion 18b so as to sandwich the vertical portion 18 at 1. Finally, by tightening the fixing bolt 22, the second pedestal member 5 and the slide plate member 1 are tightened.
8 is fixed and positioned with respect to the pedestal receiving plate 1b.

Thus, in this embodiment, the second pedestal member 5
In the normal state, the second pedestal member 5 is held by the slide plate member 18 together with the rollers 14 and 16 from the pedestal receiving plate 1b (machine base). In a state in which the injection unit U is removed, only the rollers 14 and 16 are landed on the pedestal receiving plate 1b (machine base) so that the injection unit U can be easily turned by a manual direct operation.
The mechanism for rotating the injection unit U is extremely simple and compact, and the operation for rotating the injection unit U is easy and reliable.

[0028]

As described above, according to the present invention, the mechanism for turning the injection unit can be made simple and compact, and the cost and size can be reduced, and the injection unit can be turned. Easy and reliable injection molding machine can be provided, and its value is great.

[Brief description of the drawings]

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

FIG. 2 is an enlarged front view of a main part of FIG.

FIG. 3 is a left side view of a main part of FIG. 1;

FIG. 4 is an explanatory diagram viewed from above showing a state in which the injection unit is turning in the injection molding machine according to the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 machine base 1a, 1b pedestal receiving plate 2 fixed die plate 3 first pedestal member 3a slide receiving seat 4 support shaft O rotation center 5 second pedestal member 5a slide receiving seat 5b notch 5b-1 tapered portion 6 connecting bar U injection Unit 7 Slide bar 8 Headstock 9 Heating cylinder 10 Nozzle 11 Hydraulic motor 12 Injection cylinder 13 Nozzle touch cylinder 14, 16 Roller 15, 17 Support shaft 18 Slide plate member 18a Wedge plate 18a-1 Taper 18a-2 Hole 18b Vertical portion 18b-1 Through hole 19 Height adjustment bolt 20 Screw shaft 21 Tightening nut 22 Fixing bolt 23, 24 Rotation stopper bolt

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B29C 45/00-45/84 B22D 17/20-17/32

Claims (3)

(57) [Claims] An injection molding machine capable of rotating an injection unit by a predetermined amount in a horizontal direction with respect to a machine base member. The injection molding machine carries a lower portion of the injection unit and has a predetermined amount in a horizontal direction with respect to the machine base member. A pedestal member provided so as to be able to pivot only; a roller member pivotally supported by the pedestal member, the lowermost end of which is positioned below the bottom surface of the pedestal member; and a lower surface of the pedestal member. And a slide plate member having a tapered portion corresponding to the tapered portion of the pedestal member formed on the upper surface thereof, wherein the slide plate member is provided with a tapered portion. In the state fitted in the notch of the member, the slide plate member raises the lowermost end of the roller member with respect to the machine base member. In the state where the injection unit is supported via the pedestal member, and the slide plate member is pulled out of the notch of the pedestal member, the roller member lands on the machine base member, and together with the pedestal member. An injection molding machine characterized in that the injection unit is configured to be able to be manually turned directly. 2. The pedestal member and the slide plate member are fixed and positioned with respect to the machine base member in a state where the slide plate member is fitted in a notch of the pedestal member. means and an injection molding machine, characterized in that a and stopper means for defining a pivot limit position of the base member. 3. The injection molding machine according to claim 1, wherein a plurality of roller members using a ball bearing are provided.