WO2018068157A1 - Procédé et installation pour assurer le fonctionnement d'un circuit - Google Patents

Procédé et installation pour assurer le fonctionnement d'un circuit Download PDF

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Publication number
WO2018068157A1
WO2018068157A1 PCT/CH2017/000092 CH2017000092W WO2018068157A1 WO 2018068157 A1 WO2018068157 A1 WO 2018068157A1 CH 2017000092 W CH2017000092 W CH 2017000092W WO 2018068157 A1 WO2018068157 A1 WO 2018068157A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
pressure
water
circuit
heater
Prior art date
Application number
PCT/CH2017/000092
Other languages
German (de)
English (en)
Original Assignee
Regloplas Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Regloplas Ag filed Critical Regloplas Ag
Publication of WO2018068157A1 publication Critical patent/WO2018068157A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/007—Tempering units for temperature control of moulds or cores, e.g. comprising heat exchangers, controlled valves, temperature-controlled circuits for fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B29C45/7306—Control circuits therefor
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure

Definitions

  • FIG. 2 enlarges a first section of the circuit diagram according to FIG. 1
  • FIG. 3 shows in a vertical section a pressure holding device of the device according to FIG. 1, FIG.
  • the present device can also be called a temperature control unit.
  • the present device has a first main circuit I (FIGS. 1 and 2), which comprises a consumer 99, a circulation heater E21 and a pump M10. These components of the main circuit I are connected in series by means of a main line 8. In this case, the circulation heater E21 is connected between the pump M10 and the consumer 99.
  • the existing water in this circuit I serves as a working medium.
  • the temperature of water in the first main circuit I can be considerably increased because of the activity of the consumer 99. be subjected to.
  • the present device also has a device 5 for keeping constant pressure in the water of the first main circuit I. This device 5 is also called pressure holder 5 below.
  • the present device also has a second main circuit II, which among other things for regulating the pressure and the water level in
  • Pressure holder 5 is used.
  • a device for venting the first main circuit I is provided.
  • This venting device comprises a pipe connection 17, which is mounted below the upper cover 11 on the wall 13 of the container 10 of the pressure-retaining device 5.
  • the venting device further comprises a valve Y8, which is located in the second main circuit II. This valve Y8 is between the pipe connection 17 and the
  • the coolant used is water.
  • the pipe connection 17 is located at the highest point of the present device, so that this entire device can be vented by means of this device. This means that the bottom 12 of the container 10 of the pressure holding device 5 is above the upper lid 21 of the container 20 of the circulation heater 2.
  • the volume of the container 10 of the pressure holding device 5 is smaller than the volume of the container 20 of the circulation heater 2 in the main circuit I.
  • a first sensor 31 for the level of the water level in the container 10 of the pressure-maintaining device 5 is provided, which monitors the achievement of the highest permissible level of the water level in the container 10 of the pressure-maintaining device 5.
  • a second sensor 32 for the level of water level in the container 10 of the pressure holding device 5 is provided, which monitors the achievement of the lowest permissible level of the water level in the container 10 of the pressure holding device 5.
  • the outputs of the water level sensors 31 and 32 are at Heidelbergvor- 00092
  • the heater E27 of the pressure holder 5 is disposed below the lower end 33 of the sensor 32 for the lowest allowable level of water.
  • the heater E27 is located on the one hand at a distance from the lower end 33 of the sensor 32 for the lowest allowable level of water and on the other hand at a distance from the lower lid 12 of the container 10 of the pressure holding device 5.
  • When the heater E27 is in operation then forms Steam inside the container 10, above water.
  • With the help of a double hatching 34 is water and with the aid of a simple hatching 35 steam in the interior of the container 10 of the pressure holding device 5 is indicated.
  • the present device also includes a control circuit which can control the appropriate operation of the heating device E27 in the pressure holder 5 as a function of the magnitude of the water pressure in the circulation heater 2.
  • the input of this control circuit is connected to a pressure sensor B8.
  • the output of this control circuit is connected to the heater E27 in the pressure holder 5.
  • This control circuit further includes a regulator, which is connected between the input and the output of the control circuit.
  • This controller is designed so that it can control the operation of the heater E27 in the pressure holder 5 depending on the size of the water pressure in the circulation heater 2.
  • the pressure sensor B8 may be fluidly connected to the interior of the container 20 of the circulation heater 2 or to the interior of the container 10 of the pressure holder 5.
  • the interior of the container 10 of the pressure-maintaining device 5 is fluidly connected to the interior of the main circuit I. This is done in the case illustrated 17 000092
  • This pipe section 27 extends between the bottom 12 of the container 10 of the pressure holding device 5 and the upper lid 21 of the container 20 of the circulation heater 2 and it connects these fluidly with each other. It is essential that the bottom 12 of the container 10 of the pressure holder 5 is above the upper lid 21 of the container 20 of the cycle heater 2. For the operation of the present device, it is important that the interior of the container 20 of the cycle heater 2, the interior of the pipe section 27 and the lower portion 34 of the container 20 of the pressure holder 5 are filled with water. Because of this, the steam 35, which is located above water 34 in the pressure holder 5, exert influence on the pressure in the first main circuit I.
  • the pressure increase in the entire water cycle I is made.
  • the amount of pressure is adjusted via the pressure in the steam 35 above water 34 in the pressure holder 5.
  • the pressure is thus adjusted via the vapor pressure of the water at a certain temperature.
  • This target pressure to be controlled is regulated by the control / regulation.
  • the target pressure to be controlled depends on the desired flow temperature in the lower-lying main circuit of the water to the temperature of the device. Arrangements in which forces are transmitted by means of liquids are called hydraulic systems.
  • the hydraulic system has cavities, of which the first cavity is bounded by the walls of the container 10 of the pressure holder 5 and the second cavity through the walls of the first main circuit I, wherein such cavities are fluidly connected to each other by means of the pipe section 27.
  • the cross sections of the cavities are important. If the force acts from the cavity, which has the smaller cross-section, then known, the forces which are greater inside the cavity with the larger cross section than the forces acting in the cavity with the smaller cross section.
  • the pressure exerted by the smaller cavity on the larger cavity is sometimes also called stamping pressure. If in the present case, the pressure holder 5 has the smaller volume and the smaller cross-section, then by means of a H2017 / 000092
  • the pressure in the water in the first main circuit I has a high base value during operation of the machine. Because of the action of the working tool that results during operation of the machine, this basic value of pressure may be subject to variations. In the present case, it is necessary to intercept the fluctuations of the basic value of the pressure in the first main circuit I, so that the machine can work quickly and without interference. Such fluctuations in the pressure value have relatively small amplitudes. Such pressure fluctuations can be intercepted by the operation of the pressure holder 5, in the manner indicated above. This is done by a suitably controlled operation of the Schugropers E27 in the pressure holder 5, which generates steam 35 in the pressure holder 5 according to the ab réelleden fluctuations in the pressure value in the main circuit I.
  • the outputs of the water level sensors 31 and 32 are connected to means which can control the supply of cooling water into the circulation heater 2 and the outlet of water from the circulation heater 2.
  • the means for supplying cooling water have a pump M2, a first line L1 and a valve Y2, which are connected in series. This series circuit is connected at one end to the inlet ON for the cooling water and at the other end to that region of the container 20 of the circulation heater 2, which is located below the top cover 21 of the container 20.
  • the means for discharging water from the circulation heater 2 have a valve Y22, which is interposed in a second line L2.
  • the inlet of this second conduit L2 is connected to the bottom 22 of the container 20 of the circulation heater 2 or at least to that region of the side wall 23 of the container 20 of the circulation heater 2, which is in the vicinity of the bottom 22 of the container 20.
  • the output of the second line L2 is connected to the outlet OUT of the cooling water from the second main circuit II.
  • the first main circuit I has a considerable thermal inertia. During operation of the machine it is sometimes necessary to reduce the temperature of water in the main circuit I as quickly as possible. This can be achieved by putting the first pump M2 into operation and opening the valve Y2. Fresh cooling water flows through the line L1 into the upper region of the housing 20 of the circulation heater 2.
  • the initial state of the device when it is turned on is that there is no water in the device.
  • the device is using the
  • solenoid valve Y2 With Pump M2 and opened solenoid valve Y2 filled. During the filling process, the solenoid valve Y8 remains open so that the air displaced by the water can escape from the device. The filling is completed as soon as the level probe S3 or 32 has contact with the water in the pressure holder 5. The device is now ready for use.
  • the pressure holder heater E27 is switched on.
  • the water temperature in the pressure holder 5 is brought to over 100 degrees C. From 100 degrees C arises above the water level in the pressure holder 5, a vapor phase 32 of water.
  • the pressure holder heater E27 remains switched on until the pressure, measured with the pressure transmitter B8 on the circulation heater E21, has reached the predetermined value.
  • the circulation heater E21 remains switched off during this period. This means that the main circuit I, ie the circle, which z. B. is connected to a mold, still has the same water temperature as when filling the device with water.
  • the water in the main circuit I can be heated by the circulation heater E21.
  • the water temperature in the pressure holder 5 is always slightly higher than the water temperature in the main circuit I, in order to ensure the pressure superposition in the main circuit I.
  • the solenoid valve Y22 is opened. The valve Y22 remains open until the water phase no longer has contact with the level probe S1 or 31.
  • the device When switching off the device is flushed to ensure that there is no pressure in this, the device.
  • the flushing is done by switching on the pump M2 and by opening the two valves Y2 and Y2.8 With this switching of the valves Y2 and Y2.8, the pressure holder 5 is completely flowed through with cold water, so that the device is depressurized after a short period of time. The device turns off.
  • the pressure holder 5 has the container 10, in which water 34 and water vapor 35 occur simultaneously. Important is the presence of these two phases. Water and steam keep their equilibrium depending on the temperature. This means that the pressure in the container 10 of the pressure holder 5 and thus in the entire device depends only on the temperature in the pressure holder 5. With the pressure holder 5, the device can only by means of the temperature in
  • Pressure holder 5 a certain pressure to be impressed. Volume fluctuations of water in the main circuit I are absorbed by the pressure holder, without the pressure in the main circuit I changes.
  • the heater E27 provides the necessary energy for heating the water in the pressure holder 5. The temperature of water directly determines the static pressure in the device.
  • Pressure transmission takes place via the first connecting line 27 to the main line 8 of the main circuit I.
  • the second main circuit II similar to the known devices of the same type, also has mechanical components such as pumps and valves.
  • the second main circuit II of the present device circulates only cooling water, which can not affect the functionality and the life of such components. Hot water circulates in the present device alone in the first main circuit I.
  • no mechanical components are used. This is because these pressure changes are achieved exclusively by a suitable control of the operation of the heating device Ell in the pressure holder 5.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Fluid Pressure (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

L'installation présente un circuit principal (I), qui comprend un consommateur (99), un chauffage (2) de circuit ainsi qu'une pompe (M10). L'eau sert de milieu de travail dans ce circuit. L'installation présente en outre un dispositif (5) pour maintenir constante la pression d'eau du circuit (I). Ce dispositif (5) de maintien de la pression contient un récipient (10) dans lequel se trouve un dispositif de chauffage (E27). L'intérieur du récipient (10) du système (5) de maintien de pression est relié fluidiquement à l'intérieur du circuit principal (I) à l'aide d'un élément tubulaire (27). Le récipient (10) du système (5) de maintien de la pression se trouve au-dessus du chauffage (2) du circuit. Le volume du récipient (10) du système (5) de maintien de la pression est inférieur au volume du circuit principal (I).
PCT/CH2017/000092 2016-10-14 2017-10-13 Procédé et installation pour assurer le fonctionnement d'un circuit WO2018068157A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01379/16 2016-10-14
CH01379/16A CH713048B1 (de) 2016-10-14 2016-10-14 Verfahren und Einrichtung zur Sicherstellung des Betriebes eines Kreislaufs.

Publications (1)

Publication Number Publication Date
WO2018068157A1 true WO2018068157A1 (fr) 2018-04-19

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ID=60543288

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2017/000092 WO2018068157A1 (fr) 2016-10-14 2017-10-13 Procédé et installation pour assurer le fonctionnement d'un circuit

Country Status (2)

Country Link
CH (1) CH713048B1 (fr)
WO (1) WO2018068157A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1579317A1 (de) * 1965-12-28 1970-07-30 Svenska Gummifabriks Aktiebola Verfahren zur Aufrechterhaltung eines bestimmten Druckes in einem Heiss- und Kuehlwasserumlaufsystem fuer Vulkanisierpressen,insbesondere fuer die Reifenvulkanisierung
US4072181A (en) * 1975-10-24 1978-02-07 Vihorlat, Narodny Podnik Apparatus for regulating the temperature of a casting mold
US4680001A (en) * 1984-11-28 1987-07-14 Application Engineering Corporation Passive mold cooling and heating system
US20100187709A1 (en) * 2008-10-16 2010-07-29 Zhong Wang System and method for rapidly heating and cooling a mold
US20110232856A1 (en) * 1998-06-11 2011-09-29 Malcolm Barry James Temperature control method and apparatus
WO2015189729A1 (fr) * 2014-06-10 2015-12-17 Tecnoidee Srl Dispositif ou circuit de thermorégulation pour des moules ou systèmes à haute température

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1579317A1 (de) * 1965-12-28 1970-07-30 Svenska Gummifabriks Aktiebola Verfahren zur Aufrechterhaltung eines bestimmten Druckes in einem Heiss- und Kuehlwasserumlaufsystem fuer Vulkanisierpressen,insbesondere fuer die Reifenvulkanisierung
US4072181A (en) * 1975-10-24 1978-02-07 Vihorlat, Narodny Podnik Apparatus for regulating the temperature of a casting mold
US4680001A (en) * 1984-11-28 1987-07-14 Application Engineering Corporation Passive mold cooling and heating system
US20110232856A1 (en) * 1998-06-11 2011-09-29 Malcolm Barry James Temperature control method and apparatus
US20100187709A1 (en) * 2008-10-16 2010-07-29 Zhong Wang System and method for rapidly heating and cooling a mold
WO2015189729A1 (fr) * 2014-06-10 2015-12-17 Tecnoidee Srl Dispositif ou circuit de thermorégulation pour des moules ou systèmes à haute température

Also Published As

Publication number Publication date
CH713048A2 (de) 2018-04-30
CH713048B1 (de) 2021-12-30

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