JPH0158051B2 - - Google Patents

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention provides an injection unit that is installed approximately parallel to or on the side of a mold clamping device that moves a movable mold horizontally forward and backward relative to a fixed mold to open and close the mold. This invention relates to injection molding machines arranged side by side at a predetermined angle of inclination.

[Prior art and its problems]

Conventionally, an injection molding machine that has a mold clamping device that moves a movable mold horizontally relative to a fixed mold and opens and closes the mold is equipped with an injection unit 1 that is aligned with the mold opening and closing direction, as shown in Figure 1. , as shown in the plan view of FIG. 2, there is one in which the injection unit 2 is provided in a direction perpendicular to the mold opening/closing direction.

Today, the following technical demands are placed on these conventional devices.

(1) Reduce the floor space occupied by the equipment and make it more compact.

(2) The position of the injection unit relative to the mold clamping device can be easily changed as required.

etc.

[Purpose of the invention]

The present invention was invented in response to the above-mentioned technical requirements, and an object of the present invention is to provide an injection molding machine that is compact and occupies a small floor area, and that allows the position of the injection unit to be easily changed.

[Configuration of the present invention]

In order to achieve the above-mentioned object, the present invention provides an injection molding machine having a mold clamping device that moves a movable mold horizontally forward and backward relative to a fixed mold to open and close the mold.
The injection unit is arranged on the machine stand together with the mold clamping device so as to be substantially parallel to the side of the mold clamping device or at a predetermined angle of inclination, and the injection unit is movable in the forward and backward direction of the movable mold and the tip of the injection unit is arranged at a predetermined angle. The nozzle installed in the mold is pivotable so that it can move toward and away from the resin injection port located on the side of the mold, and the rod of the cylinder mounted on the machine base for approaching and separating is placed near the tip of the injection unit. It is rotatably connected to the

〔Example〕

Next, an embodiment of the present invention will be described with reference to FIGS. 3 to 7. Reference numeral 10 denotes a frame, and a mold clamping device 11 is attached to the upper surface of the frame. The mold clamping device 11
The fixed platen 13 with the fixed mold 12 attached thereto, and the movable platen 15 with the movable die 14 attached with the mold clamping cylinder 16
The molds move forward and backward in the horizontal direction while being guided by tie bars 17, and when the molds 12 and 14 come into contact with each other at the mold parting surface A, a cavity is formed. 18 is the mold clamping cylinder 16
It is a fixing member integrally formed with. An injection unit 19 heats and melts the resin material input from the hopper 20 in a heating cylinder 21, and injects the molten resin into the cavity formed by the molds 12 and 14 from a nozzle 22 attached to the tip. It's summery. Reference numeral 23 denotes a machine stand provided on the upper part of the frame 10. Reference numeral 24 denotes an arm, one end of which is fixed with a pin 26 that fits into a hole 25 provided in the machine base 23, and the other end of which is connected to the injection unit 19, and the injection unit 19 rotates about the pin 26 as a fulcrum. It's becoming possible.

The rotational position of the arm 24 is changed by pushing or pulling an adjusting screw 27 through a hole 25 provided in the machine base 23 using a pin 26 provided at one end thereof. Therefore, even if the mold thickness changes and the position of the mold parting surface A changes, the nozzle touch position of the injection nozzle 22 at the tip of the injection unit 19 can be changed. 28 is the injection nozzle 22
A cylinder for touching the nozzle to the mold parting surface A is attached to the machine base 23 via a bracket 30, and the tip of the rod 31 is rotatably locked to the heating cylinder 21.

Next, to explain its action, first, pressure oil acts on the mold clamping cylinder 16 in response to the mold clamping operation signal,
The interpolated ram (not shown) advances (moves to the right in the figure), thus moving the moving plate 15 connected to the ram.
The movable mold 14 also moves forward, and the movable mold 14 contacts the mold parting surface A of the fixed mold 12 to form a cavity. Next, when pressure oil acts on the nozzle touch cylinder 28 and an elongation motion is applied, the injection unit 1
9 rotates around the pin 26, and the injection nozzle 22 is strongly pressed against the mold. Injection nozzle 2 at this time
Needless to say, the position in the mold opening/closing direction of No. 2 can be adjusted in advance using the pin 26 and the hole 25. Subsequently, the resin that has been melted and stored in the injection unit 19 in advance is injected to fill the cavity, thereby performing injection molding.

〔Effect of the invention〕

As explained above, in the injection molding machine according to the present invention, the injection unit is arranged approximately parallel to the mold clamping device or at a predetermined angle of inclination, so that the injection unit can be placed in series with the conventional mold clamping device. In addition to reducing the floor space occupied by an injection molding machine, it is also more compact than a machine in which the injection unit is installed perpendicular to the mold clamping direction.

[Brief explanation of drawings]

Figures 1 and 2 are diagrams showing conventional equipment.
The figure shows an injection molding machine with a mold clamping device and an injection unit connected in series. FIG. 2 is a diagram of an injection molding machine in which the injection unit is disposed perpendicular to the mold clamping device. 3 to 5 are views of an injection molding machine showing one embodiment of the present invention, and FIG. 3 is a plan view. Figure 4 is a front view.
Figure 5 is a side view. FIG. 6 is a detailed view of the "A" section in FIG. 1. Figure 7 is a sectional view of Figure 6. DESCRIPTION OF SYMBOLS 11... Mold clamping device, 12... Fixed mold, 14... Movable mold, 16... Mold clamping cylinder, 18... Fixed member, 1
9... Injection unit, 21... Heating cylinder, 22...
Nozzle, 23...Machine base, 24...Arm, 28...Cylinder (for nozzle touch).

Claims (1)

[Scope of Claims] 1. In an injection molding machine having a mold clamping device that moves a movable mold horizontally forward and backward relative to a fixed mold to open and close the mold, the injection unit is placed on the side of the mold clamping device. disposed on the machine base together with the mold clamping device substantially parallel to the direction or at a predetermined angle of inclination;
The injection unit is movable in the forward and backward directions of the movable mold, and the nozzle provided at the tip of the injection unit is provided so as to be pivotable toward and away from a resin injection port located on a side of the mold, and An injection molding machine characterized in that a rod of a cylinder for making contact and separation, which is mounted on a machine base, is rotatably connected to a tip of the injection unit. 2. The injection unit is rotatably provided by a pin provided on the machine base, and the pin is movably inserted into a long hole opened in the machine base, and the movable mold is moved inside the hole. 2. The injection molding machine according to claim 1, wherein the injection molding machine is provided so that its position can be adjusted in the forward and backward directions.