JP2005103959A - Heating/cooling control method for molding material feeder in injection molding machine and heating/cooling control device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating/cooling control method for the molding material feeder in an injection molding machine capable of reducing the transubstantial molding material. <P>SOLUTION: The heat of a heat generation part is absorbed by a water jacket WJ for suppressing generation of heat before the molding material MT is overheated and deteriorated by the heat generated from the molding material by the pushing force between the inner peripheral surface of a hopper HP and a piston PS, the heat transfer from a lower barrel and shearing force during a forcing period pressing the piston in the hopper downward. In this case, the water jacket WJ is demarcated into a plurality of zones Z1-Z4 and the inlet IN and return port OUT of a heating/cooling medium are provided to each of the zones and temperature detectors DT1-DT4 are arranged to the piston and the respective zones. The supply amount of the heating/cooling medium to each of the zones is controlled in relation to the difference between the preset temperature and the detected temperature of each of the zones during the downward movement of the piston. Therefore, the overheating and alteration of the molding material can be suppressed and the supply of the detercorated molding material into the barrel can be prevented. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is a type in which a molding material having a larger sheet shape or columnar shape than a granular pellet is charged into a hopper, and during the molding operation, a pressing force is applied to the molding material from above to press the molding material. In particular, the heating and cooling control of the molding material supply apparatus in the injection molding machine of the present invention, especially during the pressing and pressing, the molding material receives a shear force between the inner peripheral surface of the hopper and generates heat, and the nearby molding material is denatured. The present invention relates to a heating / cooling control method and apparatus for suppressing the above.

  There are various plastic materials for molding by an injection molding machine. If these are roughly classified, thermoplastic materials such as PE and PET (polyethylene, polyethylene terephthalate), thermosetting materials such as melanin and urea resin, and It can be divided into materials close to thermosetting such as silicon rubber and BMC (Bulk Modulus Compound).

  The thermoplastic molding material is processed into a pellet shape in advance, and is put into a hopper of an injection molding machine as a granular pellet. The thermosetting molding material is in powder form. However, rubber-based molding materials such as BMC and silicon rubber are supplied to the market as a molding material in the form of a sheet or a cylinder / cylindrical shape having an outer diameter substantially equal to the inner diameter of the hopper. The applicant of the present application has already proposed a device for efficiently supplying and switching a sheet-shaped or cylindrical molding material into a hopper (Patent Document 1).

  Such BMC and rubber-based molding materials (hereinafter simply referred to as molding materials) are vulcanized in the production stage, and also contain a large amount of volatile components, so that they deteriorate during storage and transportation, that is, volatile components are contained in the materials. Extreme care is taken not to be exposed to the outside air to be preserved (for example, injection molding using the molding material with reduced volatile components may cause white turbidity in the molded product and impair molding quality. Become).

  In addition, attention is paid to the operating conditions during the metering process so that the molding material is subjected to excessive shearing and heating by the injection screw in the barrel of the injection molding machine and its effective volatile components are not dissipated.

  In addition, unlike pellets, this molding material cannot be dropped and supplied from the hopper through the barrel opening to the inside of the barrel due to its own weight, so the upper end surface portion of the molding material is pressed downward in the hopper to remove the molding material. A pushing means for pushing into the barrel opening is required. Normally, as shown in FIG. 1, this pushing means has a piston PS and a piston rod PSRD which are arranged to be movable in the vertical direction with a predetermined gap from the inner peripheral surface of the hopper HP, via the piston rod PSRD. Then, the molding material MT on the lower surface side of the piston PS is pressed by the pressing drive unit PDU, and this is supplied to the injection screw SCRW groove in the barrel BRL.

Reference numeral PD denotes a position detector that detects the position of the piston rod PSRD in the vertical direction, and the position of the detector disposed above the piston rod PSRD is fed back to the pressing drive unit PDU.
No. 7-53956

  However, in the pushing means in the injection molding machine described above, that is, the molding material supply device, not only the molding material MT is heated by the heating due to the pressing force and the heat transfer from the barrel BRL side, but also the inner peripheral surface of the hopper HP The molding material enters a predetermined gap between the piston PS and the outer peripheral surface of the piston PS, and generates heat by receiving a shearing force when the piston PS is lowered. The generated heat is transferred to the piston PS and hopper HP, and when the heat generation reaches an overheated state, not only the volatile components of the molding material evaporate but also the nearby molding material is altered, and as a result, the altered molding material becomes barrel BRL. There is a problem that the quality of the molded product is deteriorated when it is supplied inside. At that time, it is possible to enlarge the gap so as to reduce the shearing force, but it causes another problem that the molding material MT overflows to the upper surface side of the piston PS through the gap.

  In addition, during the molding cycle operation, the position of the piston PS moves downward together with the piston rod PSRD, so that there is a problem that the position where the gap is formed, that is, the position of the portion where the heat generation is the largest changes.

Furthermore, although the molding material MT stays below the piston PS, since there is no molding material MT above the piston PS, the temperature of the corresponding part of the hopper HP is not uniform, and the temperature distribution state Changes as the piston PS moves.
In addition, as an essential characteristic of heat, it is difficult to keep the generated heat at a specific location unless special measures such as a heat insulating material are taken.
The material supply apparatus targeted by the present invention is driven in parallel with the operation / operation of the injection molding machine, and essentially the generation of heat in the apparatus is inevitable. These problems are not solved by simply cooling the material supply device.
That is, for example, when a water jacket is arranged on the outer peripheral surface of the hopper, which is a heatable / coolable area, and cooling water at a constant temperature is circulated and supplied thereto, the generated heat can be removed to some extent, but the obtained temperature distribution Is not always uniform, and if a large amount of cooling water is supplied or the cooling water temperature is set lower in order to suppress the temperature rise in the outer peripheral region where heat generation is large, overcooling occurs in the region where there is no or little heat generation. This causes a problem of occurrence of dew condensation, and causes a further problem that the condensed water droplets are mixed into the molding material and deteriorated. The above-described circumstances further complicate the cooling method for the material supply apparatus.
In addition to the above-described problem of heat generation or overheating, the temperature of the molding material MT immediately after being put into the hopper HP is normally stored at a normal temperature, so that the molding operation is in a steady state. The temperature of the molding material MT is lower by 10 ° C. or more. Accordingly, as shown in FIG. 19, when the molding material MT put into the hopper HP is immediately pushed, that is, when the molding operation is to be performed, the viscosity of the molding material MT is large, so the pressing drive More driving force is required in the unit PDU, and the equipment having a larger horsepower is required as the pressing drive unit PDU regardless of the hydraulic system or the electric motor system.
Further, when the injection molding machine is started after a long stoppage, or when it is started after a long holiday particularly in winter, the machine itself, that is, the ambient temperature of the hopper HP is considerably lower than the normal temperature, and the molding operation is accelerated. In order to start up, it is necessary to preliminarily heat the periphery of the hopper HP.
Furthermore, as described above, during the molding operation, when the periphery of the hopper is overheated due to shearing force, if cooling is performed excessively when cooling is performed, condensation may occur, and once the hopper is If dew condensation is generated on the inside, the moisture falls to the periphery of the piston PS and may react with the molding material MT, which may promote deterioration of the molding material MT. It is necessary to heat that portion so that it does not flow down in the hopper HP as a unified moisture.
As a result of diligent efforts and examinations to solve the various problems described above, the present inventors have held the gap in an appropriate range so that the molding material MT does not overflow to the upper surface side of the piston PS, and caused the pressing. Heating / cooling means are disposed at appropriate portions of the hopper and / or piston so that the molding material MT is not overheated and altered due to heat generated by heat and heat transfer from the barrel side and heat generated by shearing force. Regarding the problem that more driving force is required in the pressing drive unit PDU due to the high viscosity of the molding material MT, an overheating means is disposed at an appropriate part of the hopper and / or piston, and these are appropriately temperature-controlled. As a result, it was found that all the above problems could be solved.

  Accordingly, an object of the present invention is to provide a heating / cooling control method for a molding material supply device in an injection molding machine capable of minimizing deterioration of the molding material as much as possible in molding with a BMC or rubber-based molding material. To provide an apparatus.

In order to achieve the above object, a heating / cooling control method for a material supply device in an injection molding machine according to the present invention includes:
The molding material supply apparatus in an injection molding machine of a type in which a molding material is charged into a hopper in advance and a pressing force is applied to the molding material from above by a piston in the hopper during the molding operation. / Or heat supply / exhaust means arranged in the heatable / coolable area of the piston, temperature detection means arranged in the vicinity of the heat supply / exhaust means, and heating / cooling medium supplied to the heat supply / exhaust means In the heating / cooling control method of the molding material supply apparatus, comprising a control means that generates a control amount corresponding to the supply amount of the heating / cooling medium to the supply means and the supply / discharge means of heat and supplies the control means to the supply means.
A first stage of detecting a temperature in the vicinity of the heat supply / discharge means by the temperature detection means;
A second step of generating the control amount in relation to the detected temperature and the target temperature so that the detected temperature of the temperature detecting unit approaches a preset target temperature in the vicinity of the heat supply / discharge unit; The control unit is configured to control the supply unit based on the control amount.
In that case, the second step may further include generating the control amount in association with a piston position.
In this case, the second stage may further include a step of generating the control amount in association with a temperature history in the vicinity of the heat supply / discharge means.
Furthermore, the step of generating the control amount so that the preset target temperature has a predetermined allowable temperature range and the detected temperature is maintained within the temperature range in the second stage is further provided. Can be included.
Furthermore, in that case, the heatable / coolable area is divided into a plurality of zones, temperature detecting means are arranged corresponding to each of the zones, and the control means supplies heat supplied to the heatable / coolable area. A control amount corresponding to the discharging means can be generated.
In that case, the heatable / coolable area is divided into a plurality of zones, temperature detecting means and heat supply / discharge means are arranged corresponding to each zone, and the control means corresponds to each heat supply / discharge means. A control amount to be generated can be generated.
In order to achieve the above object, a heating / cooling control method for a material supply apparatus in an injection molding machine according to the present invention is as follows:
The molding material supply apparatus in an injection molding machine of a type in which a molding material is charged into a hopper in advance and a pressing force is applied to the molding material from above by a piston in the hopper during the molding operation. Heat supply / discharge means, temperature detection means, supply means for supplying a heating / cooling medium to the heat supply / discharge means, and heating to the heat supply / discharge means A control amount corresponding to the supply amount of the cooling medium is generated and supplied to the supply means, and at least a first temperature target value set in advance corresponding to the heating / cooling region and referred to during the molding operation, and the heating Control means for generating, as time-series data, a second temperature target value different from the first temperature target value corresponding to the coolable region, the second temperature target value In heating and cooling control method for referring to perform the condensation suppression process the molding material supply unit,
The dew condensation suppression process is performed during the progress of any one of the operation modes of the molding cycle, stop transition, start-up, transition to interruption, or restart after interruption.
In that case, the dew condensation control process is:
A first stage of detecting the temperature of the heatable / coolable region by the temperature detecting means;
Based on the second step of generating the control amount in relation to the detected temperature and the second target temperature so that the detected temperature follows the second temperature target value, and based on the generated control amount It can be configured to have a dew condensation suppressing function comprising a third stage in which the supply means is controlled by the control means.
In this case, the second stage includes a step in which the second temperature target value is stored in advance in the memory as digital data, and the control means reads the data to generate the time series data. Can be configured.
In this case, in the second stage, the second temperature target value is defined as one or a plurality of functions, and the control means identifies the function and calculates the value to calculate the time series. It can be configured to include generating data.
In order to achieve the above object, a heating / cooling control device for a material supply device in an injection molding machine according to the present invention comprises:
Heating and cooling control is performed on the molding material supply device in an injection molding machine of a type in which a molding material is charged into the hopper in advance and a pressing force is applied to the molding material from above by a piston in the hopper during the molding operation. A heat supply / discharge unit disposed in a heatable / coolable region of the hopper and / or piston, a temperature detection unit disposed in the vicinity of the heat supply / discharge unit, and the heat supply / discharge unit. In contrast, a supply means for supplying a heating / cooling medium and a control means for generating a control amount corresponding to the supply amount of the heating / cooling medium to the heat supply / discharge means and supplying it to the supply means are provided in the control means. During operation, the control amount is generated in relation to the detected temperature and the target temperature so that the detected temperature of the temperature detecting means approaches a preset target temperature in the vicinity of the heat supply / discharge means. It can be configured to have a program memory for storing a quantity generator.
In that case, the control amount generation program may be configured to further include a step of generating the control amount in association with a piston position.
In this case, the control amount generation program may further include a step of generating the control amount in association with a temperature history in the vicinity of the heat supply / discharge means.
In this case, the control device can be configured to be integrated as a part of a controller that controls the main body of the injection molding machine.
In this case, the heat supply / exhaust means can be constituted by an electronic cooling / heating member.
In order to achieve the above object, a heating / cooling control device for a material supply device in an injection molding machine according to the present invention comprises:
Heating and cooling control is performed on the molding material supply device in an injection molding machine of a type in which a molding material is charged into the hopper in advance and a pressing force is applied to the molding material from above by a piston in the hopper during the molding operation. And
Heat supply / discharge means disposed in a heatable / coolable region of the hopper and / or piston;
Temperature detecting means disposed in the heatable / coolable region;
Supply means for supplying a heating / cooling medium to the heat supply / discharge means;
A control amount corresponding to the supply amount of the heating / cooling medium to the heat supply / discharge unit is generated and supplied to the supply unit, and is set in advance corresponding to the heating / cooling possible region and is referred to at least during the molding operation. Control means for generating a second temperature target value different from the first temperature target value corresponding to the first temperature target value and the heatable / coolable region as time-series data. The program memory of the means
A mode determination program for determining that any one of the operation modes of molding cycle, stop transition, start-up, transition to interruption or restart after interruption is specified;
A mode execution program for performing the determined mode;
A dew condensation suppressing program for performing a dew condensation suppressing process with reference to the second temperature target value while the mode execution program is in progress can be stored.

The heating / cooling control method and apparatus according to the present invention is a type of injection molding in which a molding material is previously charged in a hopper, and a pressing force is applied to the molding material from above by a piston in the hopper during a molding cycle operation. The temperature control is performed on the heatable / coolable region of the molding material supply device in the machine, and during the press-fitting, the molding material pushes in between the inner surface of the hopper and the piston and transfers heat from the barrel. Further, it is possible to prevent heat generation due to shearing force and deterioration of the molding material in the vicinity, and the molding material is supplied from the lower part of the hopper into the barrel without being deteriorated, so that it is possible to avoid the defective quality of the molded product.
In addition, when the temperature of the molding material put into the hopper is lower than the temperature during the pushing operation during the steady molding operation, the viscosity of the molding material can be reduced by increasing the temperature early by heating, There is no need to make the pressing drive part larger than necessary.
Further, by providing the heat supply / discharge means for suppressing the heat generation in both the hopper and the piston, the heat / coolable area is further divided for each zone, and the heat supply / discharge means is arranged in each zone. Since temperature control is performed every time, the timing and efficiency of cooling and heating can be performed with higher accuracy.
Furthermore, if an electronic cooling / heating member is used as the heat supply / exhaust means, the heating / cooling medium passage and the heating / cooling medium need not be temperature-controlled and stored, and the entire cooling device can be made compact.
Furthermore, since the dew condensation suppressing program is operated corresponding to all the operation modes, it is possible to prevent the dew condensation from occurring.

Hereinafter, examples based on the embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 to 8 relate to the heat supply / discharge means in the present invention for cooling the hopper HP.

FIG. 1 is a view showing an example of a hopper heating / cooling means according to the present invention, wherein (a) is a view showing an axial section of a lower portion of the hopper, and (b) is a water jacket and a hopper in (a). It is an expanded partial sectional view which shows that the contact part is formed with the cross-sectional shape of a square groove in order to expand a contact area.
In FIG. 6A, a cooling water jacket WJ is attached to the outer peripheral surface of the hopper HP, and a heating / cooling medium, for example, cooling water is supplied to the inlet IN side from a heating / cooling medium supply unit (not shown). Through the return port OUT side.

  Therefore, when the piston PS is pressed downward by a driving means (not shown), the molding material MT on the lower side of the piston PS not only receives heat and heat transfer from the barrel side by the pressing force, but also the piston PS Since it enters the gap between the side surface and the inner peripheral surface of the hopper HP and generates shear force there, these heat is transmitted from the hopper HP to the water jacket WJ, and is transferred to the outside through the cooling water. The molding material MT on which the shear force acts and the molding material in the vicinity thereof are not brought into an overheated state by appropriate supply control of the cooling water, and their alteration is suppressed. The water jacket WJ is partitioned into four zones Z1, Z2, Z3, and Z4 in the vertical direction, and an inlet IN and a return port OUT are provided in each zone. Reference numerals DT1 to DT4 denote temperature detectors that detect the temperature of the portion of the hopper HP corresponding to each zone. Reference numeral DT0 is a temperature detector for the piston PS portion when the piston PS is set to zone Z0.

  FIG. 6B shows the cross-sectional shape of the square groove for increasing the contact area between the water jacket WJ and the hopper HP and improving the heat transfer from the hopper HP to the water jacket WJ as described above. Yes.

  FIG. 2 is a view showing another example of the hopper heating / cooling means according to the present invention, and shows a state in which a pipe line through which a heating / cooling medium flows is in contact with the outer surface of the hopper. Front view of hopper with spirally arranged paths, (b) is a diagram showing a case where a plurality of pairs of annular pipe lines are arranged in contact with the outer peripheral surface of the hopper, and (c) is a semicircular groove formed on the outer peripheral surface of the hopper It is a hopper partial expanded sectional view which shows having been carried out. In FIG. 6A, temperature detectors DT1 to DT4 are arranged on the outer peripheral surface of the hopper HP, as in FIG. A heating / cooling medium supply unit CLU is connected to the upper and lower ends of the pipe line CLP of the spiral pipe through which the heating / cooling medium flows, and the temperature-controlled heating / cooling medium flows into the pipe line. . The unit CLU has a plurality of pairs of heating / cooling medium supply and return input / output ports. The heating / cooling medium may be in the form of a gas in addition to the liquid such as the cooling water.

  FIG. 2 (b) shows a case where the pipe conduits CLP are arranged in contact with the zones Z1 to Z4 on the outer peripheral surface of the hopper HP, and the temperature detectors DT1 to DT4 are disposed in the vicinity of each pipe conduit CLP. . Further, the heating / cooling medium supply unit CLU is provided with flow rate adjusting valves VL1 to VL4 for adjusting the fluid flow rate to the pipe line CLP corresponding to each zone, and the heating / cooling medium supply is supplied to each pipe line CLP. A predetermined amount of heating / cooling medium can be supplied independently from the unit CLU. Reference numeral STR is a storage unit for the heating / cooling medium, and is maintained at a preset fluid temperature. The storage unit STR may store a plurality of fluids having different temperatures. Reference numeral 100 denotes a control device that supplies a control signal to each of the flow rate adjusting valves. Further, as shown in FIG. 5C, a semicircular groove is formed on the outer peripheral surface of the hopper HP in order to increase the contact area between the pipes CLP and the hopper HP.

  FIG. 3 is a view showing still another example of the hopper heating / cooling means according to the present invention, in which (a) shows a state in which a Peltier element using the Peltier effect is arranged on the outer periphery of the hopper via a base. (B) is a block diagram showing power supply to each Peltier element, and (c) is a plan view seen from the Z direction of (a). Reference numeral PWSU is a power supply unit that supplies power to each of the Peltier elements PE1 to PEN, and receives a control signal from the control device 100. The Peltier element PE, the base BS, and the heat radiation fin f using the Peltier effect constitute an electronic cooling / heating member in the present invention. In addition, although cooling and heating by the electronic cooling / heating member are performed by reversing the direction of current flow, cooling and heating may be arranged by separate members.

  FIG. 4 shows the inner peripheral surface of the hopper HP by disposing the nozzle NZ inside the hopper HP above the piston PS and spraying or dropping the same component material as the volatile component contained in the molding material MT from the nozzle NZ. And the structure which heats and cools the upper surface of piston PS is shown. As shown in FIG. 5A, a lid LD is detachably attached to the upper surface of the hopper HP, and a guide member CP1 having the nozzle NZ provided at the lower end is fixed to the lid LD. The component material is supplied to the upper part of the guide member CP1. A predetermined number of the guide members CP1 can be appropriately disposed on the lid LD. Further, the lid LD can be appropriately provided with a hole or the like for allowing the component material volatilized in the hopper HP to escape to the outside. Reference numeral MTP is a pressure sensor that detects the pressure of the molding material disposed on the lower surface of the piston PS. FIG. 4B shows an example of the case where there is no lid in FIG. 4A, and shows a case where a guide member CP2 having a nozzle facing the lower side inside the hopper is detachably attached to the upper end of the hopper. Various mechanical and magnetic means can be employed to simplify the attachment and detachment, but details thereof will be omitted. FIG. 6C is a plan view of the state in which the annular guide member RNG is disposed on the upper end surface of the hopper HP as viewed from above the hopper, and the component material is supplied on the outer periphery of the annular guide member RNG. The nozzle IN is supplied to each nozzle NZ through a passage inside the RNG.

  In the example of FIG. 4, it is not necessary to arrange a jacket or pipe for supplying heating / cooling medium on the outer periphery of the hopper HP as in FIGS. 1 to 3, and it is relatively expensive as shown in FIG. 3. There is no need to arrange a large number of electronic cooling / heating members on the outer periphery of the hopper HP, and the structure is simple.

  5 to 11 relate to means for cooling the piston PS in the present invention.

  FIG. 5 is a view showing an example of the piston heating / cooling means according to the present invention. FIG. 5 (a) shows a state where a passage for a heating / cooling medium is formed inside the piston, and FIG. (a) shows a cross section taken along the line AA of (a), (c) shows a heating / cooling medium passage formed in a spiral shape as an example of another passage corresponding to the cross section of the AA line of (a), (d) Shows that a plurality of pairs of annular passages, which are examples of other passages, are formed.

  As shown in FIGS. 2A and 2B, a pair of heating / cooling medium passages PSG are formed in the piston PS as indicated by broken lines. Reference symbol Z0 indicates a case where the piston PS is set as one cooling target zone. Reference numeral DT0 is a temperature detector that detects the temperature of the piston PS portion as described above.

  As shown in FIG. 3C, the heating / cooling medium passage PSG is formed in a spiral shape. Further, in FIG. 4D, a plurality of pairs of annular passages PSG1, PSG2, and PSG3 are formed. In FIG. 4D, the heating / cooling medium can be supplied independently to each annular passage.

  FIG. 5 shows an example in which the passage of the heating / cooling medium is formed inside the piston PS. However, in FIG. 6, a cooling block CB covering the side surface and bottom surface of the piston PS is fixed integrally with the piston PS. The case where the passage of the heating / cooling medium is formed in the cooling block CB is shown. The heating / cooling medium is supplied through an inlet IN and a return outlet OUT provided on the upper surface side of the piston PS as shown in the figure.

In FIG. 6, the outer surface and bottom surface of the cooling / heating block CB have the same cooling function as the piston PS shown in FIG. 5, and the passage inside the cooling / heating block CB is related to the piston PS. Various forms are possible.
FIG. 7 is an example in which a side surface cooling / heating block CBS is attached to and fixed to the side surface of the piston PS in order to cool and heat mainly the side surface of the piston PS. FIG. 7A shows an axial cross section of the piston PS. (B) is a view from the arrow Y in (a), and (c) is a view from the arrow Y corresponding to the case where the side surface cooling / heating block CBS is formed of a plurality of cooling / heating blocks. In (c), the heating / cooling medium to each cooling / heating block CBS can be supplied and controlled independently.

  FIG. 8 shows an example in which a bottom surface cooling / heating block CBB for mainly cooling the bottom surface side of the piston PS is attached and fixed to the piston PS. The heating / cooling medium supply / discharge to / from the bottom surface cooling / heating block CBB is performed via pipes P1 and P2. By increasing the axial thickness of the bottom surface cooling / heating block CBB to some extent, the molding material MT entering not only the bottom surface portion but also the hopper HP can be cooled and heated. Further, by combining this bottom surface cooling / heating block CBB with the heating / cooling means of the hopper HP shown in FIGS. 1 to 4, heat generation can be suppressed more effectively.

  FIG. 9 shows an example in which the side surface and bottom surface of the piston PS are separately formed and combined to cover the piston PS. In FIG. 9A, the side surface cooling / heating block CBS is arranged on the bottom surface cooling / heating block CBB. In the case, (b) shows an example in which the bottom surface cooling / heating block CBS is arranged inside the side surface cooling block CBS. By combining the side surface cooling / heating block CBS and the bottom surface cooling / heating block CBB in this way, the degree of freedom in forming and processing the passage of the heating / cooling medium is increased, and as a result, it is effective in improving the cooling / heating efficiency. is there.

  10 and 11 show an example in which an electronic cooling / heating member similar to that shown in FIG. 3 is employed as means for cooling / heating the piston PS.

  FIG. 10 shows an example in which the Peltier element PE and the fin f are arranged on the upper surface of the piston PS via the base BS, where FIG. 10A is a front view and FIG. 10B is a plan view. As shown in (b), the base BS, the Peltier element PE and the fin f are arranged as one continuous annular body on the upper surface of the piston PS, but from the base BS, the Peltier element PE and the fin f. A plurality of these electronic cooling / heating members may be appropriately arranged as individual units.

  FIG. 11 shows an example in which an annular groove or recess opening upward in the piston PS is formed, and an electronic cooling / heating member having a Peltier element PE is attached to the recess. FIG. 4A shows the cross section, and FIG. 4B is a partially enlarged view of the radiation fin f viewed from the X direction of FIG. Here, the length B of the annular groove or the bottom surface of the recess is formed so as to ensure the radial length L of the fin f and its heat dissipation effect. In FIG. 11, the side surface of the piston PS is cooled and heated from the inside, so that there is a cooling and heating effect with respect to shear heat generation as compared with the case of cooling and heating the upper surface of the piston PS shown in FIG. 10.

  FIG. 4C shows a case where the fin f in FIG. 5A is arranged above, and FIG. 4D shows an enlarged view of another fin structure. Since the length B 'of the bottom surface of the annular groove or recess in FIG. 5C can be made smaller than the length B in FIG. 5A, the decrease in rigidity of the piston PS due to the formation of the annular groove can be reduced. In FIG. 4D, the length L ′ is larger than the length L of the fin f in FIG.

FIG. 12 is a control block diagram of a heating / cooling control device for a material supply device according to the present invention, wherein (a) is a control block diagram of the entire heating / cooling control device, and (b) is a program of the control device The contents of the memory PG · M are shown, and (c) shows the contents of the data memory DT · M of the control device.
In FIG. 6A, reference numeral 100 is given to the control amount DRV to the push drive control unit 102 for controlling the vertical position of the piston rod PSRD and the heating / cooling medium supply means 106 via the interface iF. The control device generates a control amount ESi corresponding to the medium supply amount. The heating / cooling medium supply means 106 is provided with the above-described heating / cooling medium supply unit CLU for the water jacket and pipe line and the power supply unit PWSU for the electronic cooling / heating member. Here, the heating / cooling medium and the current flowing through the electronic cooling / heating member are collectively referred to as a heating / cooling medium.
The pushing device 104 coupled to the pushing drive control unit 102 may include a servo motor that is drivingly connected to a hydraulic cylinder or a rotation / linear motion conversion mechanism and the piston rod PSRD. Reference symbols CML and FBL indicate a command signal and a feedback signal, respectively. As described above, the reference symbol DP is a position signal of the piston rod PSRD, that is, the piston PS, but may be included in the feedback signal FBL as a signal from a rotary encoder connected to the drive shaft of the servo motor.
On the other hand, a predetermined amount of heating / cooling medium is supplied from the supply means 106 to the cooling device 108. Reference symbol CML indicates the supply amount, and FBL indicates the return amount. Reference numeral DT indicates a temperature detection signal from a temperature detector arranged in a heatable / coolable region of the cooling device 108. The control device 100 includes a central processing unit CPU, a program memory PG · M, a data memory DT · M, a bus line BL interconnecting them, and the interface unit iF. Further, a display device 110 and a keyboard 112 for operator operation are connected to the bus line BL. Various status signals STAi corresponding to the operating state are given from the controller of the injection molding machine main body via the interface unit iF, and these signals are stored in the data memory DT · M.
The control device 100 will be described as dedicated to the heating / cooling control device in the present invention, but may be configured as a part of the controller of the injection molding machine main body.

FIG. 12B shows the main contents of the program memory PG · M of the control device 100. In the figure, a program memory PG · M stores a program PG1 for performing the entire heating / cooling control process and various programs PG2 to PG8 shown in the figure that are executed as subroutines in the program PG1. PG3 is a mode determination program, and specifies an operation mode designated based on each status signal STAi or a command from an operator directly. Here, the operation modes include normal molding cycle operation, stop of the cycle operation, start-up operation, interruption, restart operation after interruption, and the like.
In the normal molding cycle operation mode, a program PG5 for heating / cooling medium supply processing and / or a program PG6 for power supply processing indicated as mode MD1 are stored.

  PG4 is a dew condensation determination program, and determines the possibility of dew condensation occurring in a heatable / coolable region in the material supply apparatus. When a region where condensation is possible is specified by the determination program PG4, a condensation suppression processing program PG7 is executed.

The condensation suppression processing program PG7 that is selectively designated in each mode is stored as the mode MD2. Programs for executing the stop or restart modes MDj are collectively indicated as PG8.
FIG. 12C shows the main contents of the data memory DT · M. In the drawing, the status signals STA1, STA2, and STAi are stored in the memory area STA. Reference symbol MDE is a bit signal for instructing the end of each mode operation. Reference symbols DP, MTP, CLT, and MD indicate memory areas for storing the current position of the piston PS, the pressure of the molding material, the temperature of the supplied heating / cooling medium, and the currently selected operation mode, respectively.

  Further, reference numerals Z0, Z1, Z2, Z3, and Z4 indicate the zones when the heatable / coolable region is divided into a plurality of zones (four in the figure). Below each zone Z0 to Z4, temperature set values ST0 to ST4 corresponding to the zones, the control amounts ES0 to ES4, detected temperatures DT0 to DT4, and temperature history data DT0t1 to tN, DT1t1 to tN of the zones, ... DT4t1 to tN are stored.

The reference symbol TGD is a memory area for storing the temperature target value read in the dew condensation control, corresponding to each zone Zi, separately from the temperature set values (target values) ST0 to ST4 corresponding to the zones. Yes, as shown, MD3, MD4, MD5, MD6 are grouped by mode.
FIG. 13 is a block diagram illustrating details of calculation of the control amount ESi in the heating / cooling control apparatus for the material supply apparatus according to the present invention.

  In the figure, a predetermined temperature set value STi in the zone Zi, a determined mode MD, and a temperature detection value (current value) DTi in the zone Zi are input to the arithmetic unit ALU from the left. From below, the position DP of the piston PS, the pressure MTP of the molding material MT, the heating / cooling medium temperature CLT, and the transition data DTit1 to DTitN of the temperature detection value of the zone Zi are input. The calculation unit ALU calculates a control amount ESi to be given to the zone Zi based on these pieces of information.

  As the simplest calculation, the difference between DTi and STi can be defined as the control amount ESi as it is, but as another method, known PID control or the transition data DTit may be considered.

  The position DP of the piston PS has the largest influence on the heat generation amount, that is, cooling, and the piston position changes during the cycle operation. Therefore, it is preferable to consider the calculation of the control amount ESi. Similarly, it is preferable that the MTP and CLT are also considered when the required temperature control accuracy is high, although there is a difference in degree. That is, it can be considered that the temperature set value STi is apparently changed by the position of the piston PS and the data DTit, MTP, CLT and the like.

  In the description of FIG. 13 described above, it is assumed that the control amount ESi is generated in the zone Zi corresponding to the zone Zi, and that the zone Zi has heating / cooling means independent of other zones. However, as in the example shown in FIG. 2, the temperature detectors DT1 to DT4 are arranged corresponding to the zones partitioned in the vertical direction of the hopper HP. The heating / cooling medium is supplied. In this case, the control amount ESi is calculated as a common value for each zone. The set temperature STi may be set with a predetermined width, and a threshold value may be appropriately provided so that a new control amount is calculated only when the temperature detection value DTi exceeds the width.

  FIG. 13 is a block diagram illustrating details of calculation of the control amount ESi in the heating / cooling control apparatus for the material supply apparatus according to the present invention.

  In the figure, a predetermined temperature set value STi in the zone Zi, a determined mode MD, and a temperature detection value (current value) DTi in the zone Zi are input to the arithmetic unit ALU from the left. From below, the position DP of the piston PS, the pressure MTP of the molding material MT, the heating / cooling medium temperature CLT, and the transition data DTit1 to DTitN of the temperature detection value of the zone Zi are input. The calculation unit ALU calculates a control amount ESi to be given to the zone Zi based on these pieces of information.

  As the simplest calculation, the difference between DTi and STi can be defined as the control amount ESi as it is, but as another method, known PID control or the transition data DTit may be considered.

The position DP of the piston PS has the greatest influence on the amount of heat generation, that is, cooling, and the piston position changes during the cycle operation. Therefore, it is preferable to consider the calculation of the control amount ESi. Similarly, it is preferable that the MTP and CLT are also considered when the required temperature control accuracy is high, although there is a difference in degree. That is, it can be considered that the temperature set value STi is apparently changed by the position of the piston PS and the data DTit, MTP, CLT and the like.
In the description of FIG. 13 described above, it is assumed that the control amount ESi is generated in the zone Zi corresponding to the zone Zi, and that the zone Zi has heating / cooling means independent of other zones. However, as in the example shown in FIG. 2, the temperature detectors DT1 to DT4 are arranged corresponding to the zones partitioned in the vertical direction of the hopper HP. The heating / cooling medium is supplied. In this case, the control amount ESi is calculated as a common value for each zone. The set temperature STi may be set with a predetermined width, and a threshold value may be appropriately provided so that a new control amount is calculated only when the temperature detection value DTi exceeds the width.

FIG. 14 is a flowchart for explaining the entire process of the heating / cooling control method for the material supply apparatus according to the present invention.
In the figure, when the processing of the program PG1 starts, update of data related to heating / cooling control is confirmed in step S1. Next, in step S2, the mode is determined by the program PG3. When the mode determined at step S3 is MD <= 2, the process goes to step S5, and when MD> 2, the process of step S4 is executed.

  If NO in step S5, MD = 2 is further determined in step S6, and if NO in step S6, the condensation related steps S7, S8, S9 and S10 are skipped and the process proceeds to step S11. If YES in steps S5 and S6, dew condensation is determined by program PG4 in step S7, and whether or not there is a possibility of dew condensation is confirmed in step S8.

If NO in step S8, the process proceeds to step S11. If YES, a zone that may cause condensation is specified in step S9. Next, the dew condensation suppressing process is performed on the zone by the program PG7.
Next, in step S11, the type of heating / cooling means is confirmed. That is, in the case of the heating / cooling medium method, the heating / cooling medium supply processing is performed by the program PG5 in the zone supplying the heating / cooling medium among the zones other than the zone where condensation may occur in step S12. . Further, when NO in S11 and when the processing in step S12 is completed, the power supply processing for the zone in which the electronic cooling / heating member remains in step S13 is executed by the program PG6.

  Next, in step S14, it is confirmed whether or not there is a pushing drive command meaning that the cycle operation is being performed. If YES, the program PG2 is executed in step S15. When NO in step S14 and when the processing in steps S15 and S4 ends, the presence or absence of mode MDE indicating that cooling and dew condensation suppression processing has ended is confirmed in step S16. Repeat the process. Moreover, if it is completed, the program PG1 is completed.

FIG. 15 is a flowchart for explaining details of steps S12 and S13 in the flowchart of FIG. 14, that is, details of heating / cooling control by the heating / cooling medium and the electronic cooling / heating member during the molding cycle operation.
In the flowchart, for simplification of description, four heating / cooling medium zones Z1 to Z4 shown in FIG. 2B are defined on the outer peripheral surface of the hopper HP, and further, 1 shown in FIG. A description will be given assuming that two electronic cooling / heating zones Z0 are defined on the piston PS.
In FIG. 15, when the processing of programs PG5 and PG6 is started, each zone Zi (i = 0 to 4) is divided into three groups CLU, PE and DE according to the cooling mode in step S1. Here, CLU is a zone where a heating / cooling medium is used, PE is a zone where an electronic cooling / heating member is used, and DF is a zone where condensation is possible. Next, in step S2, the value of the zone designation index i is initialized, and the heating / cooling medium processing process in steps S3 to S8 is executed.

  In steps S3 and S4, the zone other than the zone CLU using the heating / cooling medium, and the zone Z1 of the DF are removed. In step S5, the calculation in the calculation unit ALU shown in FIG. 13 is performed to generate the control amount ESi. Next, the flow rate of the heating / cooling medium corresponding to the control amount ESi generated in step S6 is commanded to the flow rate adjustment valve VLi.

Next, in step S7, it is confirmed that the index i is less than 4. If NO in S7, it is incremented in step S8 and thereafter steps S3 to S7 are repeated in the same manner. Accordingly, zones Z2, Z3, and Z4 are targeted in S5 and S6.
When YES in S7, the generation / calculation of the control amount ESi for each zone of the electronic cooling / heating member is performed in the same manner as the heating / cooling medium in steps S9 to S15. In S10 and S11, zones other than the zone PE using the electronic cooling / heating member are excluded. Accordingly, only the zone Z0 is targeted in S12 and S13.

FIG. 16 is a flowchart for explaining details of step S4 in the flowchart of FIG. 14, that is, the control of dew condensation suppression by the heating / cooling medium and the electronic cooling / heating member during the operation in the stop mode or the like (MDj).
In the flowchart, for simplification of description, four heating / cooling medium zones Z1 to Z4 shown in FIG. 2B are defined on the outer peripheral surface of the hopper HP, and further, 1 shown in FIG. A description will be given on the assumption that two electronic cooling zones Z0 are defined on the piston PS.
In FIG. 16, when the processing of the program PG8 starts, the stop mode (j = 3) is confirmed in step S1. Steps S2 to S13 of MD3 indicated by a chain line are executed when YES in step S3. If NO, MD4 (start-up mode), MD5 (interrupt mode), and MD6 (restart mode) are selected in determination steps S14 and S15, respectively.
In MD3, the number of zones Zi is set to 4, the control amount ESi at times t0 to tN is calculated in each zone, and the heating / cooling medium or power corresponding to the ESi is used as the heat in each zone. This is to be given to the supply / discharge means. In steps S2 and S3, the setting of the time t is confirmed. In step S4, the index i of the zone Zi is initialized. In step S5, the temperature target value STi (tk) at time t (k) of the time series data group corresponding to MD3 of the memory area TGD is read, and in step S6, the control amount ESi in the zone Zi is calculated. In step S7, the heating / cooling medium flow rate corresponding to the calculated control amount ESi is supplied to the flow rate adjusting valve VLi (or a predetermined current is supplied to the Peltier element of the electronic cooling / heating member).

In steps S8 and S9, the processes in S4 to S6 are incremented up to all zones, that is, Z4 and repeated. When i = 4 in step S8, the data read timing is determined in step S10. That is, when t does not reach tN, t is incremented (t + 1) through steps S11, S12, and S13, and the process goes to step S16 in FIG. When S16 in FIG. 15 is NO, the process proceeds from S1, S2, S3 to S4 as described above.
In FIG. 16, MD4, MD5, and MD6 also execute a process for suppressing condensation similar to MD3.
The difference between the modes is, for example, in the startup mode MD4, the molding material MT is newly put into the hopper HP, the piston PS is at the uppermost end position, and molding is performed even when a predetermined pressing force is applied. Since the temperature of the material MT is close to the normal temperature at the beginning, there is a risk of condensation if the flow rate of the heating / cooling medium is not kept low when cooling in this state, and the molding material MT inside the hopper can be altered. Therefore, in the cooling in the start-up mode MD4, it is necessary to pay attention to the actual start point of the dew condensation suppression control, the target set temperature value, and the control range.

Also, in the case of the interruption mode, it is specified during the molding cycle operation, and since it is assumed to restart, the position of the piston PS is temporarily moved to the highest point for the reason of interruption or when the position is maintained as it is Various considerations are required especially for the position of the piston PS.
In the stop mode, in a state where a predetermined number of shots remain during the molding cycle operation, that is, when dew condensation is suppressed in parallel with the molding cycle operation for a certain period of time, or after the molding cycle operation is terminated, the dew condensation is suppressed. The amount of heat generated or transmitted varies depending on the state on the injection molding machine side, and it is preferable to pay attention to these points as well.

FIG. 17 is a diagram for explaining the control amount calculation of the heating / cooling control device provided with dew condensation suppression during the stop transition operation according to the present invention, where (a) shows the control block, and (b) A graph showing time series data of the temperature target value in the stop transition mode, (c) is a graph showing time series data of the temperature target value in the stop transition mode as a function value, and (d) is a detected temperature in the heating / cooling possible region. It is a graph which shows that temperature target value is corrected by transition.
In FIG. 5A, the arithmetic unit ALU includes a detected temperature DTi in the zone Zi in the heating / cooling possible region from the left side, a designated mode MD (in this example, a stop transition mode of MD = 3) and a zone. A temperature target value STi of Zi is given. The calculation unit ALU is given a piston position DP and a detected temperature transition DTit of the zone Zi from below. Based on these pieces of information, the calculation unit ALU calculates a control amount ESi corresponding to the supply amount of the heating / cooling medium to be supplied to the heat supply / discharge means in the zone Zi.

The temperature target value STi is sequentially read out from the data group MD3 corresponding to the stop transition mode of the memory area TGD storing the time series data of the dew condensation suppression temperature target value in FIG. . Time lapses t0 to tN correspond to the stop transition process time, and are engraved as appropriate time intervals, and the number N indicates the number of the intervals. The elapsed time may be set in accordance with the number of shots of the injection molding machine. However, it is not necessarily specified to end the stop transition mode in synchronization with the number of shots.
There are various calculation modes for generating the control amount ESi in the calculation unit ALU, in combination with a known PID method, but in addition, it can be performed in relation to the piston PS position and / or the temperature transition. As the simplest calculation example, the difference (DTi−STi) is directly used as the control amount ESi.

The graph of FIG. 5B shows a case where the change in value of the temperature target value STi with time elapses at a substantially constant rate. Here, STi at time tN can be set to a temperature range in which there is no possibility of condensation after the stop transition, for example.
The graph of FIG. 6C shows an example in which the temperature target value is significantly changed in the first stage of the stop mode, as well as time series data using one or more time-dependent functions f (t). As shown in FIG.
FIG. 4D shows a case where the temperature target value STi given to the arithmetic unit ALU is corrected. In FIG. 4D, reference symbol ST is a temperature target value before time t (k−n), DFT is a temperature at which condensation occurs, α is a control range of the temperature target value ST, and ST + α is a detected temperature. One threshold for controlling cooling to be between ST and ST + α is shown. Reference symbol TL indicates a transition curve of the detected temperature. Reference symbol ΔST indicates a change in which ST is corrected after time t (k−n). Q1, Q2,... Q8 indicate plot points taken for explanation. As shown in FIG. 4D, even if the temperature transition is within the control range such as Q4 and Q5, the state is not maintained, and it is assumed that the temperature transition occurs as Q6, Q7, and Q8. In this case, the operation unit ALU increases the given STi (t (kn)) by ΔST and performs the operation.

  Although the preferred embodiments of the present invention have been described with reference to FIGS. 1 to 17, in addition to these, for example, the winding density of the cooling pipe is changed according to each zone to change the heat absorption capacity. It is easy for those skilled in the art to arrange heating / cooling media and electronic cooling / heating members in each zone, and to associate the saturated vapor pressure of the atmosphere in the vicinity of the heatable / coolable area with the generation of the controlled variable. It can be implemented.

It is a figure which shows one example of the hopper heating / cooling means which concerns on this invention, Comprising: (a) is a figure which shows the axial cross section of a hopper lower part, (b) is the contact part of the water jacket and hopper in (a) It is an expanded partial sectional view which shows that is formed in the cross-sectional shape of a square groove in order to expand the contact area. It is a figure which shows the other example of the hopper heating / cooling means which concerns on this invention, Comprising: The state which has arrange | positioned the conduit which flows a heating / cooling medium in contact with the outer periphery of a hopper is shown, (a) is the said spiral (B) is a view showing a case where a plurality of pairs of annular pipe lines are arranged in contact with the outer surface of the hopper, and (c) is a semicircular groove formed on the outer surface of the hopper. FIG. It is a figure which shows the further another example of the hopper heating and cooling means which concerns on this invention, Comprising: (a) shows the state which has arrange | positioned the peltier element using the Peltier effect via the base on the hopper outer peripheral surface, b) is a block diagram showing power supply to each Peltier element, and (c) is a plan view seen from the Z direction of (a). It is a figure which shows the further another example of the hopper heating / cooling means which concerns on this invention, Comprising: The hopper inner peripheral surface and piston PS upper surface are cooled by spraying or dripping the same component material as the volatile component contained in a molding material (A) is a hopper cross-sectional view showing a case where a guide member having a nozzle facing the inside of the hopper is attached to the upper surface of the hopper via a lid, and (b) is a case where there is no lid in (a). It is an example and the partial side view which shows the case where the guide member which has the nozzle which faces a hopper inner side downward is attached to a hopper upper end part so that attachment or detachment is possible, (c) is a state where the annular guide member is arrange | positioned at the hopper upper end surface It is the top view seen from the upper part. It is a figure which shows an example of the piston heating / cooling means which concerns on this invention, Comprising: (a) is a piston side view which shows the state which formed the channel | path of the heating / cooling medium inside the piston, (b) is a figure of (a). A sectional view taken along line AA is shown, (c) shows a heating / cooling medium passage formed in a spiral shape as an example of another passage corresponding to the sectional view taken along line AA in (a), and (d) shows (a) It is a figure which shows that several pairs of cyclic | annular channel | paths which are the examples of the other channel | path corresponding to the AA cross section of A) are formed. It is a figure which shows the other example of the piston heating and cooling means which concerns on this invention, Comprising: It is sectional drawing of the piston part which fixed the cooling block which covers a piston side surface and a bottom face integrally with a piston. It is a figure which shows the further another example of the piston heating and cooling means which concerns on this invention, Comprising: (a) shows the piston axial direction cross section which attached and fixed the side surface cooling block to the piston side surface, (b) is (a). Y arrow figure and (c) are Y arrow figures corresponding to the case where the side surface cooling block is formed from a plurality of cooling blocks. It is a figure which shows the further another example of the piston heating and cooling means which concerns on this invention, Comprising: It is piston sectional drawing which attached and fixed the bottom face cooling block to the piston. It is a figure which shows the further another example of the piston heating and cooling means which concerns on this invention, Comprising: A piston side surface and a bottom face are formed separately, and an example which combines and covers a piston is shown, (a) is a side surface on a bottom face cooling block When a cooling block is arrange | positioned, (b) is a figure which shows the example which has arrange | positioned the bottom face cooling block inside a side surface cooling block. It is a figure which shows the further another example of the piston heating and cooling means which concerns on this invention, Comprising: The example which has arrange | positioned the Peltier element and the fin via the base on the piston upper surface, (a) is the front view, (b ) Shows a plan view. FIG. 7 is a view showing still another example of the piston heating / cooling means according to the present invention, in which an annular groove opened upward in the piston is formed and an electronic cooling / heating member having a Peltier element is attached, (A) shows the cross section, (b) is a partially enlarged view of the heat dissipation fin viewed from the X direction of (a), (c) shows a partial cross section when the fin in (a) is arranged upward, d) shows an enlarged view of another fin structure. It is a control block diagram of the heating / cooling control device for the material supply device according to the present invention, where (a) is a control block diagram of the entire heating / cooling control device, and (b) is the contents of the program memory of the control device. (C) is a figure which shows the content of the data memory of the said control apparatus. It is a block diagram explaining the detail of the control amount calculation in the heating / cooling control device for the material supply device according to the present invention. It is a flowchart explaining the whole process of the heating / cooling control method for the material supply apparatus which concerns on this invention. It is a flowchart explaining the detail of step S12 and S13 in the flowchart of FIG. FIG. 15 is a flowchart for explaining details of step S4 in the flowchart of FIG. 14, that is, details of control of dew condensation suppression by the heating / cooling medium and the electronic cooling / heating member during operation such as the stop transition mode. It is a figure explaining the detail of control amount calculation of the heating / cooling control apparatus provided with the dew condensation suppression during the stop transition operation according to the present invention, wherein (a) shows the control block, and (b) shows the stop transition. Graph showing time series data of temperature target value in mode, (c) is a graph showing time series data of temperature target value in stop transition mode as a function value, (d) is a change of detected temperature in a heatable / coolable region It is a graph which shows that temperature target value is corrected. It is a longitudinal cross-sectional view of the hopper lower part in the conventional molding material supply apparatus. It is a graph which shows the temperature characteristic of the viscosity of molding material resin.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Control apparatus 102 Push drive part 104 Push apparatus 106 Heat absorption / conveyance medium supply means 108 Heating / cooling apparatus 110 Display apparatus 112 Keyboard input apparatus
ALU operation part
MD mode
DP piston position
ESi control amount
DTi temperature detection value
DTiT temperature detection value transition data
MTP molding material pressure
CLT Heating / cooling medium temperature
PD position detector
PS piston
PSRD piston rod
HP hopper
BRL barrel
SCRW injection screw
MT molding material
WJ water jacket
IN entrance
OUT Return port
CLP cooling / heating pipe
CLU heating / cooling medium supply unit
BS base
LD lid
PE Peltier element f Fin
NZ nozzle
RNG annular guide member
PSG Heating / cooling medium passage
CB cooling / heating block
CBS side cooling / heating block
CBB Bottom cooling / heating block
ST Temperature target value f (t) Function α Temperature target value tolerance ΔST Temperature target value correction addition amount

Claims (28)

The molding material supply apparatus in an injection molding machine of a type in which a molding material is charged into a hopper in advance and a pressing force is applied to the molding material from above by a piston in the hopper during the molding operation. / Or heat supply / exhaust means arranged in the heatable / coolable area of the piston, temperature detection means arranged in the vicinity of the heat supply / exhaust means, and heating / cooling medium supplied to the heat supply / exhaust means In the heating / cooling control method of the molding material supply apparatus, comprising a control means that generates a control amount corresponding to the supply amount of the heating / cooling medium to the supply means and the supply / discharge means of heat and supplies the control means to the supply means.
A first stage of detecting a temperature in the vicinity of the heat supply / discharge means by the temperature detection means;
A second step of generating the control amount in relation to the detected temperature and the target temperature so that the detected temperature of the temperature detecting unit approaches a preset target temperature in the vicinity of the heat supply / discharge unit; A heating / cooling control method for a molding material supply device in an injection molding machine, comprising a third stage in which the control means controls the supply means based on the control amount.   2. The heating / cooling control method for a molding material supply apparatus in an injection molding machine according to claim 1, wherein the second stage further includes a step of generating the control amount in association with a piston position.   3. The molding material supply apparatus in an injection molding machine according to claim 1, wherein the second stage further includes a step of generating the control amount in association with a temperature history in the vicinity of the heat supply / discharge means. Heating / cooling control method.   4. The control amount is generated according to claim 1, wherein the preset target temperature has a predetermined allowable temperature range, and the detected temperature is held within the temperature range in the second stage. And a heating / cooling control method for a molding material supply device in an injection molding machine.   5. The heatable / coolable area is divided into a plurality of zones according to claim 1, temperature detecting means is arranged corresponding to each of the zones, and the control means is a heat arranged in the heatable / coolable area. A heating / cooling control method for a molding material supply apparatus in an injection molding machine, wherein a control amount corresponding to the supply / discharge means is generated.   6. The heatable / coolable area is divided into a plurality of zones according to claim 5, temperature detecting means and heat supply / discharge means are arranged corresponding to each of the zones, and the control means is the heat supply / discharge means. A heating / cooling control method for a molding material supply device in an injection molding machine, characterized in that a control amount corresponding to the above is generated. The molding material supply apparatus in an injection molding machine of a type in which a molding material is charged into a hopper in advance and a pressing force is applied to the molding material from above by a piston in the hopper during the molding operation. Heat supply / discharge means, temperature detection means, supply means for supplying a heating / cooling medium to the heat supply / discharge means, and heating to the heat supply / discharge means A control amount corresponding to the supply amount of the cooling medium is generated and supplied to the supply means, and at least a first temperature target value set in advance corresponding to the heating / cooling region and referred to during the molding operation, and the heating Control means for generating, as time-series data, a second temperature target value different from the first temperature target value corresponding to the coolable region, the second temperature target value In heating and cooling control method for referring to perform the condensation suppression process the molding material supply unit,
Molding with a dew condensation suppression function characterized in that the dew condensation suppression process is performed during the progress of any one of the following operating modes: molding cycle, stop transition, start-up, interrupt transition or restart after interruption. Heating / cooling control method for material supply device. 8. The dew condensation suppressing process according to claim 7,
A first stage of detecting the temperature of the heatable / coolable region by the temperature detecting means;
Based on the second step of generating the control amount in relation to the detected temperature and the second target temperature so that the detected temperature follows the second temperature target value, and based on the generated control amount A heating / cooling control method for a molding material supply apparatus having a dew condensation suppressing function, comprising a third stage in which the supply means is controlled by a control means.   9. The second stage according to claim 8, wherein the second temperature target value is stored in advance in a memory as digital data, and the control means reads out the data to generate the time-series data. A heating / cooling control method for a molding material supply apparatus having a dew condensation suppressing function.   9. The second stage according to claim 8, wherein the second temperature target value is defined as one or a plurality of functions, and the control means specifies the function and calculates the value. A heating / cooling control method for a molding material supply apparatus having a dew condensation suppression function, comprising a step of generating time-series data.   11. The heating / cooling of a molding material supply apparatus having a dew condensation suppression function according to claim 9, wherein the second stage includes a step of generating the time series data in association with the number of molding shots. Control method.   12. The heating / cooling control method for a molding material supply apparatus having a dew condensation suppression function according to claim 8, wherein the second temperature target value is defined corresponding to each mode.   13. The molding material supply apparatus having a dew condensation suppression function according to claim 8, wherein the second stage is such that the second temperature target value referred to when the control amount is generated is corrected. Heating / cooling control method.   14. The heating / cooling control method for a molding material supply apparatus having a dew condensation suppression function according to claim 13, wherein the correction is performed in association with the position of the piston.   The heating / heating of the molding material supply apparatus with a dew condensation suppressing function according to claim 13, wherein the correction is performed in association with a transition of the detected temperature of the cooling region corresponding to the second temperature target value. Cooling control method. 16. The operation mode according to claim 8, wherein the operation mode is a molding cycle, and the process of suppressing condensation is
A heating / cooling control method for a molding material supply apparatus having a dew condensation suppression function, wherein the possibility of dew condensation in the heatable / coolable region is determined and dew condensation is suppressed based on the determination.   Heating and cooling control is performed on the molding material supply device in an injection molding machine of a type in which a molding material is charged into the hopper in advance and a pressing force is applied to the molding material from above by a piston in the hopper during the molding operation. A heat supply / discharge unit disposed in a heatable / coolable region of the hopper and / or piston, a temperature detection unit disposed in the vicinity of the heat supply / discharge unit, and the heat supply / discharge unit. In contrast, a supply means for supplying a heating / cooling medium and a control means for generating a control amount corresponding to the supply amount of the heating / cooling medium to the heat supply / discharge means and supplying it to the supply means are provided in the control means. During operation, the control amount is generated in relation to the detected temperature and the target temperature so that the detected temperature of the temperature detecting means approaches a preset target temperature in the vicinity of the heat supply / discharge means. Heating and cooling control apparatus for molding material supply device in an injection molding machine, characterized in that it comprises a program memory for storing a quantity generator.   18. The heating / cooling control device for a molding material supply device in an injection molding machine according to claim 17, wherein the control amount generation program further includes a step of generating the control amount in association with a piston position.   19. The molding material supply in an injection molding machine according to claim 17, wherein the control amount generation program further includes a step of generating the control amount in association with a temperature history in the vicinity of the heat supply / discharge means. Heating / cooling control device for equipment.   18. The heating / cooling control device for a molding material supply device in an injection molding machine according to claim 17, wherein the heating / cooling medium is a fluid.   21. The heating / cooling control device for a molding material supply device in an injection molding machine according to claim 20, wherein the supply means has a flow rate adjusting valve.   22. The heating / cooling control device for a molding material supply device in an injection molding machine according to claim 20, wherein the supply unit has a storage unit for the fluid having different temperatures.   18. The heating / cooling control device for a molding material supply device in an injection molding machine according to claim 17, wherein the heating / cooling medium is an electric current, and the heat supply / discharge means is an electronic cooling / heating member.   25. The mode determination according to claim 17, wherein the program memory of the control device determines that one of a stop mode, a start-up mode, a stop mode, and a restart mode that is distinguished from the molding cycle operation mode is designated. A heating / cooling control device for a molding material supply device in an injection molding machine, which stores a program and a mode execution program for performing each mode determined by the determination program.   25. The data memory according to claim 17, wherein the data memory includes any one of a piston position, a detected temperature of the heatable / coolable area, a preset target temperature of the heatable / coolable area, and a temperature history of the detected temperature, or A heating / cooling control device for a molding material supply device in an injection molding machine, wherein a plurality of data groups are stored.   26. The molding material supply device in an injection molding machine according to claim 17, wherein the control device is integrally incorporated as a part of a controller that controls the injection molding machine main body. Heating / cooling control device.   An injection molding machine comprising the heating / cooling control device according to claim 26. Heating and cooling control is performed on the molding material supply device in an injection molding machine of a type in which a molding material is charged into the hopper in advance and a pressing force is applied to the molding material from above by a piston in the hopper during the molding operation. And
Heat supply / discharge means disposed in a heatable / coolable region of the hopper and / or piston;
Temperature detecting means disposed in the heatable / coolable region;
Supply means for supplying a heating / cooling medium to the heat supply / discharge means;
A control amount corresponding to the supply amount of the heating / cooling medium to the heat supply / discharge unit is generated and supplied to the supply unit, and is set in advance corresponding to the heating / cooling possible region and is referred to at least during the molding operation. Control means for generating a second temperature target value different from the first temperature target value corresponding to the first temperature target value and the heatable / coolable region as time-series data. The program memory of the means
A mode determination program for determining that any one of the operation modes of molding cycle, stop transition, start-up, transition to interruption or restart after interruption is specified;
A mode execution program for performing the determined mode;
A condensate suppression program for performing a dew condensation suppression process with reference to the second temperature target value during the execution of the mode execution program is stored. Heating / cooling control device.

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