Method for temperature control of a shaping tool

Abstract

Provided is a temperature control device having at least one temperature control branch connected to a feed, and a pump system including at least one pump for the delivery of temperature control medium in the feed. Additionally, the temperature control device is provided with at least one sensor by which at least one of the parameters from the group of temperature, through-flow amount and pressure can be detected, and a control or regulating device for regulating or controlling a delivery of the pump system, to which signals from the at least one sensor can be fed.

Claims

1. A temperature control device for a shaping tool or component of a shaping working machine, the temperature control device comprising: two temperature control branches connected to a feed; two throttle devices respectively provided in the two temperature control branches; a pump system including a pump for the delivery of temperature control medium in the feed; a control or regulating device for regulating or controlling a delivery of the pump system; and a sensor for detecting a parameter from a group of temperature, through-flow amount, and pressure, wherein signals from the sensor are fed to the control or regulating device, and wherein in at least one of the two temperature control branches, the throttle device provided therein is essentially completely open.

2. The temperature control device according to claim 1, wherein the two temperature control branches are connected in parallel.

3. The temperature control device according to claim 2, wherein each of the two temperature control branches includes a sensor for detecting a parameter from a group of temperature, through-flow amount, and pressure, wherein signals from the sensor included in each of the two temperature control branches are fed to the control or regulating device.

4. The temperature control device according to claim 1, wherein the control or regulating device regulates or controls the delivery of the pump system by controlling or regulating the rotary speed of the pump.

5. The temperature control device according to claim 1, wherein the control or regulating device regulates or controls the delivery of the pump system by shutting down or switching on the pump.

6. The temperature control device according to claim 1, wherein the temperature control device is an accessory device for the shaping working machine.

7. A shaping working machine having the temperature control device according to claim 1.

8. An arrangement comprising two shaping working machines and the temperature control device according to claim 1, wherein the shaping tools of the two shaping working machines can be temperature-controlled by the temperature control device in a serial or a parallel relationship.

9. The shaping working machine according to claim 7, wherein the shaping working machine is an injection moulding machine, a die casting machine or a pressing machine.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows a diagrammatic view of a temperature control device 14 according to the invention according to a first embodiment of the invention.

(2) FIG. 2 shows a flow chart for illustrating a particularly preferred embodiment of a method according to the invention.

(3) FIG. 3 shows a diagrammatic view of a temperature control device 14 according to the invention according to a second embodiment of the invention.

DETAILED DESCRIPTION OF THE INVENTION

(4) FIG. 1 shows a diagrammatic view of a temperature control device 14 according to the invention. It has two temperature control branches 2 which pass through a shaping or mould tool 3. Through-flow sensors 7, temperature sensors 4 and through-flow valves 15 are also present in the temperature control branches 2. It will be appreciated that the through-flow sensors 7 can also be in the form of a component together with the through-flow valves 15. In addition there is provided a regulating or control device 1in this embodiment a regulating device. It is connected to the through-flow sensors 7, the temperature sensors 4 and the through-flow valves 15. The temperature sensors 4 represent an alternative to through-flow measurement.

(5) The two temperature control branches 2 are respectively connected to the feed 5 and the return 6. A pump 13 delivers temperature control medium from the return 6 into the feed 5. In addition an optional heat exchanger 16 is arranged in the return 6. The pump 13 is also connected to the regulating device 1 for regulation purposes.

(6) FIG. 2 shows a flow chart for illustrating a particularly preferred embodiment of a method according to the invention. Therein:

(7) i denotes the serial number of the temperature control branches 2,

(8) n denotes the number of temperature control branches 2 used,

(9) Xi denotes the degree of setting of the through-flow valve 15 in the temperature control branch i [%]

(10) Vi denotes the volume flow in the temperature control circuit i,

(11) F denotes the pump system delivery flow.

(12) That temperature control branch i* which at least approximately remains 100% open can be displayed to a user as a branch which is determining in respect of the overall system (bottleneck). In that way the user has the option of reducing in specifically targeted fashion the hydraulic resistance of that temperature control branch 2 for example by the removal of quick-action couplings or by reducing hose lengths. In that way the delivery flow of the pump 13 can be further reduced with simultaneous opening of the through-flow valves 15 of the further temperature control branches 2.

(13) Unlike FIG. 1, FIG. 3 has only one temperature control branch 2. The temperature control device 14 is in the form of an accessory device. The following are arranged in a common housing 20: pump 13 through-flow sensor 7 tank 17 for temperature control medium heating means 18 for heating the temperature control medium in the tank 17 cooling means 19 for cooling the temperature control medium in the tank 17 optionally a temperature sensor 4, and a regulating or control device 1.