DE8802462U1 - Device for controlling the coolant flow from a coolant reservoir to a mold for plastic masses - Google Patents

Description

gwk $355/88

"Device for regulating the
coolant flow from one)
Kühlssi t tsls ⁿ eicher outside one!
tool for plastic masses"

The invention relates to a device for controlling the coolant flow from a coolant reservoir to a molding tool for plastic masses, for example a plastic injection mold, wherein
the device consists of a housing with a coolant inlet connection, a coolant outlet connection
•as well as a valve or similar that interrupts the line between the inlet and outlet connections
consists.

Previously known devices essentially consist of a shut-off device, for example a valve, which is equipped with a mechanical element that visually indicates the flow, so that the flow rate can be changed by manually operating the valve.

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On the one hand, such a control is complex because an operator must always be available to adjust the valve accordingly, and on the other hand, the adjustment and control is extremely inaccurate.

Based on this state of the art, the invention is based on the object of creating a device of the generic type, which independently and fully automatically monitors the coolant flow and, depending on the flow rate,

Temperature or pressure, whereby the device

It should also be easy to install and easy to handle.

To solve this problem, it is proposed that the valve has an electrically operated actuator, and that at least one of the following components is arranged in the device housing:

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Temperature sensor,
pressure sensor,
flow meter,

wherein the sensor(s) or device are each connected to an electric glider via an electrical cable, which in turn is connected to the actuator of the valve via an electrical cable.

The invention makes it possible to control the shut-off device, in particular the valve, via an electric actuator depending on a control variable recorded by the electric controller. The controller is optionally electrically connected to the temperature sensor, the pressure sensor or the flow meter, so that the pulses emitted by the corresponding sensors or the meter can be read into the controller and passed on as control signals from the controller to the actuator of the valve.

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This creates a fully automatic control device in which the user only has to set the controller to the predetermined value in order to then obtain the corresponding control processes depending on temperature, pressure or flow rate.

By arranging all components in a common housing, a compact and easy-to-handle design is achieved, which facilitates installation and handling.

Preferably, a flow line and a return line are arranged in the housing, each with an inlet and outlet connection, and a temperature sensor/pressure sensor is installed in both lines, and if necessary a flow meter is installed in the return line, which sensor or device can be connected to the controller via control lines.

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In this way, it is possible to monitor both the coolant flow and the coolant return and to automatically control the valves in the desired direction by transmitting the values recorded by the sensors or measuring devices to the controller.

A preferred design of the device is that the housing is essentially rectangular and has the tool-side coolant connections on one end of the housing and the storage-side coolant connections on one long side, as well as further connections on the opposite long side that lead into these connections and can be closed with plugs, and the sensors and similar controllers, as well as switches for opening and closing the connecting line between the controller, sensors and device, setpoint setting devices for the controller, a display device for the effective value of the sensor or device connected to the controller.

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and selector switches for the display device are arranged.

In order to enable multiple devices to be arranged next to one another, connecting devices for parallel coupling of additional housings are provided on the narrow sides of the housing.

An embodiment of the invention is shown in the drawing and described in more detail below. It shows:
Fig. 1 shows a device according to the invention in view;

Fig. 2 the same in side view, partially broken away;

Fig. 3 shows a multiple arrangement of the device side by side;

Fig. 4 is a schematic puncture diagram of the device;

&igr; Fig. 5 is a schematic diagram of the device.

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The device for regulating the coolant flow from a coolant reservoir 1 or 1* to a mold 2 for plastic masses, for example a plastic injection mold, consists essentially of a housing 3, with a coolant inlet connection 4, a coolant outlet connection 5 and a line 6 arranged between them.

This embodiment is shown in a highly simplified form in Figure 5.

A valve 7 or another suitable shut-off device is arranged between the inlet connection and the outlet connection, which can be adjusted by means of an electrically operated actuator 8. Furthermore, a temperature sensor 9,
/a pressure measuring sensor 10 and a flow rate meter 11 are integrated in the line 6* The sensors 9»10 and the measuring device 11 are connected via electrical lines to an electrical right-hand regulator 12, possibly with a digital display 13, which regulator 12 is in turn electrically connected to the actuator 8 of the valve.

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Yes, at the user's request 1.5—the temperature sensor 9 or the pressure sensor or the flow meter 11 is connected to the controller so that one of the corresponding measured values can alternatively have an influence as a controlled variable. A concrete design of such a device is shown in Figures 1 and 2.

In addition to a flow line 6*, a return line 6 ¹¹ is provided in the housing 3, each line having an inlet 4', 4*' and an outlet 5',S' ¹ .

The control valve 7 and a pressure sensor 10 are integrated into the flow line 6', while the temperature sensor 9 is installed in a housing wall near the flow channel 6*. A flow rate measuring cartridge 11* and a pressure sensor 10 are installed in the return channel 6", while the temperature sensor 9 for the return is provided near the housing wall of the channel 6*'.

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In the drawing, the actuator 8 is installed above the control valve 7. All components that are intended to record the desired properties of the cooling medium passing through, as well as the water-carrying lines and connections themselves, are arranged within a connection block that is part of the housing 3. The corresponding connection lines of the measuring elements are guided in a cavity in the housing 3 located above this connection block 14 and connected to a central terminal or plug block. From this terminal block 15, lines lead to the taper 12 arranged in the housing part above it, which can be optimized by means of adjusting screws 16 that pass through the front face of the housing. Selector switches are arranged above the controller 12, by means of which the connection between the taper and the desired sensor or measuring device can be established. Display symbols are shown above the selector switches, which indicate the connection established by pressing a button.

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Above this, a setpoint adjuster 18 is arranged, on which the setpoint for the temperature, the flow rate or the pressure can be set.

Above this there is another selector switch 19, which controls the display 20 (digital display) located above it and, depending on the button pressed, the temperature, the flow rate or the pressure

(effective value).

&eegr; Figure 4 shows a basic functional diagram

; picture shown which shows the function of the device

should explain.

&iacgr; By means of a battery of devices, namely

four such devices in housings 3 is a

&bull;4 Control of the coolant circuit for a tool

with four cooling channels. The connection pieces for the cooling water connection of return and flow are arranged in the side flanks of the housing, so that when the housings are coupled together , the connection pieces form a common, continuous line.

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The lines 6 branch off from these and lead as a supply line or return line to the respective cooling channel of the tool 2. By selecting the control variable, namely the temperature, the pressure or the flow rate, the coolant is now transferred by the corresponding sensors or measuring devices in each device and the corresponding valve is adjusted by means of the actuator controlled by the relevant controller.

The cooling water is usually taken from the pipe network, whereby alternatively or additionally it can also be provided that the tap water is fed into a pre-tempering circuit 1', from which the pre-heated cooling water is then taken for the purpose of regulating the coolant flow to the tool.

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The invention is not limited to the embodiments but is variable in many ways within the scope of the disclosure*

All new individual and combination features disclosed in the description and/or drawing are considered essential to the invention.

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Claims (3)

1. Device for regulating the flow of coolant from a coolant reservoir to a molding tool for plastic masses, for example a plastic injection mold, the device consisting of a housing with a coolant inlet connection, a coolant outlet connection and a valve or the like interrupting the line between the inlet and outlet connections, characterized in that the valve (7) has an electrically actuated actuator (8), at least one of the following components is arranged in the device housing (3): gwk9355/88 Temperature sensor (9),
Pressure sensor (10),
Flow meter (11), wherein the sensor(s) or the device are each connected to an electrical controller (12) via an electrical line, which in turn is connected to the actuator (8) of the valve (7) via an electrical line. 2. Device according to claim 1, characterized in that a flow line (6*) and a return line ( ^6f ') ^with inlet and outlet connections are arranged in the housing (3), and in both lines (6', ¹¹ ) a temperature sensor (9), a pressure sensor (10) and, if necessary, a flow rate measuring device (11) are installed in the return line, which sensors or which device can be connected to the controller (12) via control lines. Il Il ·· lit Il Il ItIIIIIIIII t I I · · «»II if·· &Lgr;,/ I I I I *t · I · ·· ^*/ «&bull;&bull;«&bull;&bull;III
!&bull;lilt« «I ·«·· I» i« gwk9335/88 3. Device according to claim 1 or 2, characterized in that the housing (5) is essentially rectangular and in the longitudinal extension of the housing on one end face has the tool-side coolant connections (5', 4' * > and on one long side the storage-side coolant connections (4', 5'') as well as on the opposite long side a further connection opening into these connections, which can be closed with plugs (21) and in the longitudinal extension of the housing one behind the other the sensors (9, 10, 11) and the like, controllers (12) and switches (17) for opening or closing the connecting line between controller (12), sensors (9, 10) and device (11), setpoint setting devices (17, 18) for the controller (12), a display device (20) for the effective value of the connected to the controller (12) Sensor or device UDd selector switch (19) for the display device (20) are arranged. «II« II«·««· I l«l· III··· &bull; III· «It· t.r-t'l Il till Il ·i gwk9353/88 A. Device according to one of claims 1 to 3, characterized in that connecting devices for parallel coupling of further housings (3) are provided on the cutting edges of the housing (3).