HB-Therm at Fakuma, Hall A4 – 4205
Thermo-5 temperature control unit line from HB-Therm to be extended
Hot: High-temperature water units up to 230 °C
The reliable and internationally well known Thermo-5 temperature control unit portfolio of HB-Therm is upgraded with two other types. HB-Therm thus complies with many customer requests for high-temperature units with water as temperature control medium. There is a clear market trend of going to higher temperatures. Many applications are being developed requiring the use of these types of high-temperature water units.
Although the high temperature for water up to 200 °C or 230 °C is new, the proven technology remains the same: i.e. including controlled superimposed system pressure, proportionally controlled cooler bypass and ultrasonic flow meter.
With the addition of the HB-200Z2B and the HB-230Z2B to the temperature control unit portfolio plastic manufacturer get the opportunity as of October 2017 to benefit from this technology into the highest temperature range. Do note that raised requirements are placed on the stability of moulds and fixtures due to the high temperatures for water and the resulting pressures. The required pressure resistance for 200 °C is 31bar and for 230 °C is 47 bar.
Controlled: Temperature control devices with speed-controlled pump
The issue is not new: What is the correct pump for my temperature control unit? The question has never been easy to answer because for universal use units in injection moulding the requirements are so diverse that the exactly right pump has never existed. If pumps are operated at a constant speed, an efficient solution for applications with large and small temperature control channel cross-sections is not possible purely for physical reasons. The answer is therefore: To adjust the characteristic curve by controlling the pump speed in relation to the application in such a way that the desired flow is attained with minimum energy costs.
The flow ratios in the temperature control channel and also the quality of heat transfer from the temperature control medium to the injection moulding tool are determined by the flow dependent on the channel cross-section. If the flow rate is too low, little drive power is required but heat transfer and temperature distribution in the tool are too poor. If the flow is increased beyond the optimum value, heat transfer only improves minimally but the necessary drive power increases disproportionately. The question is now: What is the correct pump speed then?
With its temperature control units in this portfolio, HB-Therm now creates efficient remedies because the Thermo-5 temperature control units are now also available with controlled pump. The units offer the operators effective assistance in selecting a suitable pump speed. In Eco-mode the unit itself determines the flow necessary for the application and therefore makes energy saving possible without putting process safety at risk. As soon as energy is saved, this is shown in the unit display with a green leaf.
The new Thermo-5 units can also be integrated into process systems by means of suitable interfaces meaning that their speed can be changed due to the superimposed flow control. This control type is especially suited to uses with temperature control circuits switched in parallel and flow-controlled temperature control circuits.
Highly accurate: Calibrated temperature management for compliance with precise temperature control
How do I know whether the temperatures and flows displayed on the temperature control units are accurate? And how can I fulfill the quality requirements for periodically verifying and documenting the accuracies?
Inaccuracies always occur in the ascertainment of measuring values because high-precision sensors and probes have their tolerances. For temperature probes these are ±3 °C and for pressure sensors ±0.4 bar. In extreme cases, this can lead to the process temperature changing by up to 6 °C and this remaining undiscovered as a result of the replacement of a temperature control device. Only an elimination of these deviations guarantees reliable and reproducible temperature control. All units are therefore supplied calibrated ex works.
HB-Therm offers the customer the opportunity to verify the units independently and periodically with the aid of a testing device. The unit takes the operator through the entire test process and then offers him the possibility of automatically recalibrating temperature, pressure and flow. Test reports can be saved and distributed for documented maintenance.
Networked: OPC UA combines HB-Therm units with industry 4.0
Large parts of the manufacture will completely change with the specifications from industry 4.0. Are temperature control units also affected by this?
The answer is yes because in future machines, systems or sensors will communicate with one another globally and exchange information on products and production comprehensively. Via the new optional OPC UA interface the HB-Therm temperature control devices can be controlled remotely and enable the read-off of various information by other installations and machinery.