JPH0453691B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a support device for an injection device of an injection press compound molding machine, and in particular to a support device for an injection device of an injection press compound molding machine with respect to mutual movement between the injection device and the press device. The present invention relates to a support device for an injection device.

[Prior Art] Conventional injection press compound molding machines are used in combinations of a horizontal press device and a vertical injection device, and a combination of a horizontal injection device and a vertical press device, but in the former, the height of the device is generally high. There were problems with the installation, such as sagging, and poor workability when replacing the screw. For this reason, the latter combination has become mainstream, and for example, as shown in FIG. A resin passage (hot runner) 33 is cut and a heater 34 is provided around the resin passage to inject resin 35 into cavity A (Japanese Patent Laid-Open No. 61-22917).
Alternatively, as shown in FIG. 7, a mold 41 and a hot runner are separated, a long hot runner 42 is provided, and the periphery thereof is covered with a heating ring 43 (Japanese Patent Application Laid-open No. 1989-1999).
66558), and improvements have been made to the contact points between the injection device and the press device and to reduce resin loss.

[Problems to be Solved by the Invention] However, in the above-mentioned combination of the conventional horizontal injection device and vertical press device, the one shown in FIG. When the mold is moved and reduced in size, there is a problem that the contact pressure between the injection nozzle and the mold decreases, causing resin to leak. The one in Figure 7 has a long resin path from the injection nozzle of the injection molding machine to the mold gate through the hot runner, so the injection device and hot runner of the injection molding machine expand and contract due to heat.
There is a problem in that the contact position between the injection nozzle and the mold is misaligned. Further, both FIGS. 6 and 7 have problems such as requiring a large installation space. In order to prevent this, it is preferable to provide a horizontal injection device under the tie plate of the vertical press device, but this poses a problem in that it becomes difficult to replace and inspect the injection nozzle, screw, etc. of the injection device.

The present invention focuses on the above-mentioned conventional problems, and in a combination of a horizontal injection device and a vertical press device, the injection device of the injection molding machine is provided under the mold on the fixed side, and the injection device expands and contracts due to heat. Also, the contact position between the injection nozzle and the mold does not shift, and
The object of the present invention is to provide a support device for an injection device of an injection press compound molding machine, which allows easy replacement and inspection of the injection nozzle, screw, etc. of the injection device.

[Means for Solving the Problems] In order to achieve the above object, the first invention according to the present invention provides a vertical press device such as a press that opens and closes a mold, and a horizontal injection device that supplies molten resin between the molds. In an injection press compound molding machine with a vertical press device, a horizontal injection device is installed under the die plate of the vertical press device, and the mounting device of the horizontal injection device slides around the injection nozzle in accordance with the expansion and contraction of the horizontal injection device due to heat. . Further, in the second invention, the injection nozzle of the horizontal injection device is bent into an L-shape and is brought into contact with the injection nozzle mold with a predetermined surface pressure. In a third invention, in an injection press compound molding machine having a vertical press device such as a press for opening and closing a mold and a horizontal injection device for supplying molten resin between the molds, there is provided a temperature detection means for the injection device of the horizontal injection device; , a position movement detecting means based on the temperature of the injection device, a control means for controlling the movement of the injection by detecting the temperature or a movement of the injection device, and a control means for controlling the injection device by a signal from the control means for controlling the movement of the injection device. It consists of a means of transportation. Furthermore, in a fourth invention, in an injection press compound molding machine having a vertical press device such as a press that opens and closes a mold and a horizontal injection device that supplies molten resin between the molds, a horizontal injection molding machine is provided below the die plate of the vertical press device. The present invention is characterized in that an injection device is provided, and the injection device can be moved to facilitate replacement and inspection of the injection nozzle, screw, etc. of the injection device.

[Function] According to the above configuration, the injection section of the injection molding machine is disposed below the die plate and the mold on the fixed side, and even if the injection device expands and contracts due to heat, the injection nozzle of the injection section and Since the injection device is slid so that the mutual positions of the molds do not shift, the mold does not move even when the injection device is extended, and no resin leaks even when it is contracted. In addition, the injection nozzle is bent into an L shape and controlled by an actuator, etc. so that it contacts the bottom surface of the mold on the fixed side with a constant surface pressure, so the mold remains stable regardless of expansion and contraction due to heat or the injection pressure of the resin. There is no movement, and no resin leaks. Furthermore, when replacing or inspecting the injection nozzle, screw, etc. of the injection device, the injection device can be moved from below the die plate to the outside, making the work easy.

[Example] Hereinafter, an example of a support device for an injection device of an injection press composite molding machine according to the present invention will be described in detail with reference to the drawings. FIG. 1 shows the first embodiment of the present invention.
FIG. 1 is an overall configuration diagram of an embodiment. In FIG. 1, a lower mold 3 is placed on a fixed die plate 2 of a compression molding machine 1. Fixed die plate 2 and lower mold 3
An injection section 10a consisting of an injection cylinder or the like of the injection device 10 is disposed below the lower mold 3.
The injection nozzle 10b of the injection part 10a is located on the lower surface of the L
It is bent into a letter shape and is pressed by the actuator 5 by rotation of the injection device mount 4 so as to abut with a predetermined surface pressure. At this time, in order to make contact with a predetermined surface pressure, the hydraulic pressure of the actuator 5 is detected by pressure gauges 6a, 6b, and controlled by a set pressure controller 8 of pressure regulating valves 7a, 7b so that the hydraulic pressure becomes a predetermined hydraulic pressure. . Further, the injection nozzle 10b is provided with a resin passage opening/closing valve 10c, which is operated by a servo motor (not shown) to open when filling with resin and close when compressing the resin. The injection nozzle 10b and the injection device pedestal 4 are connected by a rod 9. Further, as shown in FIG. 2, the injection nozzle 10b is fixed by applying a block 23 whose mounting position can be adjusted with an elongated hole or the like after contacting the lower mold 3. The actuator 5 is actuated by switching the pressure from the pressure source 11 through the switching valve 12, and presses the injection nozzle 10b against the lower surface of the lower mold 3 with a predetermined pressure via the rod 9, and at the same time pushes the injection device mount 4 onto the pin 13. It rotates as a fulcrum. Injection device mount 4 is base 1
The injection device 10 is supported by a pin 13 fixed to the injection device mount 4 . An actuator 15 is connected to the base 14 and receives pressure oil from the pressure source 11 via a switching valve 16 to cause the base 14 to slide. Between the switching valve 16 and the actuator 15, there are provided pressure regulating valves 17a, 17b controlled by the controller 8, and pressure gauges 18a, 18b that send pressure signals to the controller 8. The injection device 10 is provided with an injection section 10a consisting of an injection cylinder 19, a screw 20, and the like. In addition, the injection cylinder 19 and the injection nozzle 10
b is divided at position 21 and can be removed when replacing the screw. The injection device 10 is provided with a temperature sensor 22 .

Next, the operation of the above configuration will be explained.

When filling the cavity A of the mold 3 with resin, the injection nozzle 10b is inserted into the lower mold 3 as shown in FIG.
The controller 8 sends a control signal to the pressure regulating valve 7a and the hydraulic actuator 5 set in a predetermined position so that the pressure regulating valve 7a is pressed against the lower surface of the valve 7a with a predetermined surface pressure. Next, the servo motor is operated to open the resin passage opening/closing valve 10c, and the screw 18 is advanced to inject the resin. When the molten hot resin flows through the resin passage of the injection nozzle 10b, the injection nozzle 1
0b extends and pushes the lower mold 3 upward in the figure, but since the lower mold is fixed to the tie plate 2, it pushes down the actuator rod 5a. At this time, the pressure of the actuator 5 is regulated by the pressure regulating valve 7a to maintain a predetermined pressure. When the temperature of the injection nozzle 10b drops, the injection nozzle 1
0b contracts, lowering the pressure of the actuator 5 below a predetermined pressure. This pressure is detected by the pressure gauge 6a,
Feedback is sent to the controller 8, a signal is issued, the switching valve 12 is operated, and hydraulic pressure is sent from the pressure source 11 to control the pressure to a predetermined level. At this time, since the injection nozzle 10b and the lower surface of the lower mold 3 are reliably sealed B, the resin does not leak and the resin is reliably filled, so there is no resin loss. Next, while the resin is being filled into the cavity A of the mold 3, the injection device 10 expands due to heat, but the injection device mount 4 and base 14 are slid to the right in the drawing centering on the fixed injection nozzle 10b. At this time, the switching valve 16 is set at position P so that the base 14 is not fixed but is free. Furthermore, at this time, it is even better if the injection device mount 4 is heated and cooled in accordance with the injection device 10. When injecting and filling with the switching valve 16 in the Q position, the controller 8 calculates the amount of movement of the injection device 10 according to the signal from the temperature sensor 22 of the injection device 10, and switches according to the amount of movement. The valve 16 may be switched to send hydraulic pressure to the actuator 15 to move the base 14 and the injection device mount 4 relative to the initially set temperature, or the pressure may be detected and controlled in the same way as the actuator 5. When molding the next molded product, or when replacing or inspecting the injection nozzle 10b, screw 20, etc. of the injection device 10, hydraulic pressure is sent to the actuator 5 to contract the actuator 5, and the injection device mount 4 is pivoted around the pin 13. the lower surface 4a of the injection device pedestal 4.
is brought into contact with the base 14, but the rod 5a is further lowered so as to be separated from the injection device mount 4. When the rod 5a is separated from the injection device mount 4, hydraulic pressure is applied to the actuator 15, and the base 14 is slid to the right in the drawing, thereby moving the injection section 10a of the injection device 10 from below the die plate 2 to the outside. As a result, the injection nozzle 10b, screw 20, etc. can be replaced,
Work during inspection can be done easily.

Next, referring to FIG. 4, a second embodiment will be described. Identical parts are denoted by the same reference numerals and explanations are omitted. The rod 31 is fixed to the injection device frame 4, and the injection nozzle 10b is fixed with a bolt 32. Further, the rod 31 is provided with a gauge 33 such as a strain meter for measuring stress, and controls the contact surface pressure between the injection nozzle 10b and the mold 3.
The positions of the injection nozzle 10b and the mold 3 are determined by the injection device mount 4, and are rotated about the pin 13 as a fulcrum. The longitudinal fluctuation of the injection device 10 is detected by the position sensor 34 and fed back to the controller 8. The injection portion 10a of the injection device 10 is slidably and tightly fitted into a groove of the pedestal 35, and is coupled to the pedestal 35 via an actuator 36 to determine its position. Actuator 3
6 is connected to the pressure source 11 via a switching valve 37, and is supplied with hydraulic pressure by operating the switching valve 37 based on a command from the controller 8. Between the switching valve 37 and the actuator 36 are pressure regulating valves 38a, 38b controlled by the controller 8, and a pressure gauge 39a, which sends a pressure signal to the controller 8.
39b is provided.

Next, the operation of the above configuration will be explained.
When filling the cavity A of the mold 3 with resin, the injection device 10 becomes high temperature and expands, but the injection part 10a is slid to the right in the figure around the fixed injection nozzle 10b. At this time, the switching valve 3
7 is set at position R, and is not fixed to the pedestal 35, leaving the injection section 10a free. While the cavity A is being filled with resin, the switching valve 37 is set to the position S, and the injection part 1 is
Fix 0a. At this time, when the temperature of the injection section changes and the injection section expands and contracts, a pressure regulating valve 38a operates on one side of the actuator, causing the injection section 10a to slide in that direction, and a position sensor 38 on the opposite side of the actuator 36 controls the expansion and contraction of the injection section. Detects the amount of movement and supplies hydraulic pressure for that amount of movement. In FIG. 5, the temperature of the injection section of the horizontal injection device is detected by a temperature detection means such as a thermometer, the positional movement of the injection device due to the temperature is detected by a position detection means such as a position sensor, and the injection device A control means such as a controller that receives a detection signal of the amount of movement of the injection part by detecting the temperature or detecting the movement of the injection part, calculates it, and outputs a control signal, and a control signal from the control means that controls the movement of the injection part. It is composed of a moving means such as an actuator that moves the injection part, and prevents misalignment between the injection nozzle and the mold even if the temperature of the injection part fluctuates and the injection part expands. In the above example, the injection device pedestal 4 is rotated about the pin 13, but the injection device pedestal is fixed to the die plate 2.
It may also be moved up and down parallel to. Furthermore, although the injection device pedestal 4 and the pedestal 35 are moved by the actuators 15 and 36 in response to movement of the injection device, a ball screw or the like may also be used. Although a 4-port, 4-position switching valve is used, a 4-port, 3-position switching valve may also be used in combination.

[Effects of the Invention] As explained above, according to the present invention, the injection device of the injection molding machine of the injection press compound molding machine is made horizontal and disposed under the mold on the fixed side, and the support device of the injection device is The injection nozzle of the injection part and the metal are controlled by an actuator or the like so that it moves following the expansion and contraction of the injection part, or bends the injection nozzle into an L shape and contacts the bottom surface of the mold with a constant surface pressure. There is no misalignment in the mutual positions of the molds, there is no leakage, and there is less wear on the molds and injection nozzles. Furthermore, since the injection device is moved from below the die plate to the outside, the injection nozzle, screw, etc. of the injection device can be easily replaced and inspected. Furthermore, the mold of a conventional injection molding machine can be used, and the excellent effect of producing molded products of stable quality can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram of the overall configuration of a first embodiment of the present invention. FIG. 2 is an explanatory diagram of fixing the injection nozzle according to the first embodiment of the present invention, and FIG. 3 is a flowchart diagram of the present invention. FIG. 4 is a conceptual diagram of the overall configuration of a second embodiment of the present invention. FIG. 5 is a block diagram of the present invention. Figures 6 and 7
The figure is a front view of a mold section of a conventional example. 1... Compression molding machine, 2... Fixed die plate,
4... Injection device mount, 5, 15, 36... Actuator, 6a, 6b, 18a, 18b, 39
a, 39b...pressure gauge, 7a, 7b, 17a, 1
7b, 38a, 38b...pressure regulating valve, 8...controller, 9...rod, 10...injection device, 10
a... Injection part, 10b... Injection nozzle, 10c...
...resin passage opening/closing valve, 12, 16, 37... switching valve, 22... temperature sensor, 34... position sensor.

Claims (1)

[Scope of Claims] 1. In an injection press compound molding machine having a vertical press device such as a press that opens and closes a mold and a horizontal injection device that supplies molten resin between the molds, a horizontal injection molding machine is provided below the die plate of the vertical press device. 1. A support device for an injection device of an injection press compound molding machine, characterized in that an injection device is provided, and a mounting device for the horizontal injection device slides around an injection nozzle in accordance with thermal expansion and contraction of the horizontal injection device. 2. The support device for an injection device of an injection press compound molding machine according to claim 1, wherein the injection nozzle of the horizontal injection device is bent into an L-shape and abuts against the injection nozzle mold with a predetermined surface pressure. 3. In an injection press compound molding machine that has a vertical press device such as a press that opens and closes the mold and a horizontal injection device that supplies molten resin between the molds, a means for detecting the temperature of the injection device of the horizontal injection device; A position movement detecting means based on temperature, a control means for controlling the movement of the injection device by detecting the temperature or position movement of the injection device, and a movement for moving the injection device based on a signal from the control means for controlling the movement of the injection device. A support device for an injection device of an injection press composite molding machine, comprising: 4 In an injection press compound molding machine that has a vertical press device such as a press that opens and closes the mold and a horizontal injection device that supplies molten resin between the molds, the horizontal injection device is installed under the die plate of the vertical press device and the injection A support device for an injection device of an injection press compound molding machine, characterized in that the injection device is moved to facilitate replacement and inspection of the injection nozzle, screw, etc. of the device.