JP2005145009A - Injection molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve energy saving and space saving when the temperature of each part of an injection molding machine is controlled. <P>SOLUTION: This injection molding machine is equipped with a heating and melting part 1 for heating and melting a resin material, and a mold 2 for molding the resin material. The injection molding machine is also equipped with a container 3 which is arranged adjacently to the heating and melting part and which houses a temperature regulating medium 22 for regulating the temperature of the mold, and a conduit 20 for introducing the temperature regulating medium, heated by heat from the heating and melting part in the container, into the mold. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an injection molding machine.

  FIG. 4 is a diagram showing the structure of a conventional mold temperature control unit. In FIG. 4, a mold temperature control unit 13 is provided which is a separate unit from the injection molding machine main body 12 and has its own heat source. Regarding cooling, the temperature is lowered by flowing industrial water or city water into the injection molding machine main body 12. Alternatively, cooling is performed by providing a Peltier element inside.

  FIG. 5 shows the structure of a conventional material drying unit. In FIG. 5, the material drying unit 14 has a heater inside, and supplies high-temperature air into the hopper 9 disposed at the top of the injection molding machine main body 12 using a fan and a hose. The material is being dried.

Japanese Patent Application Laid-Open No. 10-1000021 (Patent Document 1) discloses a method for controlling the temperature of a mold and keeping warm using waste heat. The structure is shown in FIG. In FIG. 6, the entire mold 37 and the heating cylinder 32 are surrounded by the heat retaining zone 15, and the air that has become high temperature due to waste heat from the heating cylinder 32 is blown by the fan 16 a through the blower path 16 to the mold 37. It is sent to the part that surrounds. When the temperature of the atmosphere around the mold 37 is lower than the set temperature of the mold, high-temperature air is continuously sent. On the other hand, when the temperature is high, the fan 16a sending high-temperature air is stopped, and another exhaust fan 19 is started, and the temperature of the mold 37 is lowered by taking in outside air.
Japanese Patent Laid-Open No. 10-1002015

  However, since the mold temperature control unit shown in FIG. 4 has a heat source in a unit other than the injection molding machine, a dedicated power source is required, and control using an operation panel separate from the injection molding machine is required. There is a problem that it is disadvantageous in terms of energy saving, space saving, operability improvement, and low cost.

  Further, in the method of controlling the temperature of the mold and keeping the temperature using the waste heat shown in FIG. 6, the temperature is measured at a location where hot air is fed, and the two fans are turned on based on the temperature information. Since OFF is controlled, there is a follow-up control in which the operation is performed after the temperature around the mold changes, and there is a problem that the temperature of the air around the mold varies. Further, in the atmosphere around the mold, there is a problem that the portion where high-temperature air is fed is high temperature, but the temperature is low in a portion far from it. In addition, since the atmosphere around the mold is controlled, the mold is easily subjected to heat conduction from the heating cylinder, molded product, etc. in injection molding, and the temperature of the mold itself must be controlled by a separate unit. It was.

  Accordingly, the present invention has been made in view of the above-described problems, and an object thereof is to achieve energy saving and space saving when performing temperature control of each part of an injection molding machine.

  In order to solve the above-described problems and achieve the object, an injection molding machine according to the present invention is an injection molding machine including a heating and melting part that heats and melts a resin material, and a mold that molds the resin material. A container that is disposed adjacent to the heating and melting part and contains a temperature control medium for controlling the temperature of the mold, and a temperature control medium heated by heat from the heating and melting part in the container, And a conduit to be introduced into the mold.

  Further, in the injection molding machine according to the present invention, the cooling means based on the detection result of the temperature detecting means for detecting the temperature of the temperature adjusting medium, the cooling means for cooling the temperature adjusting medium, and the detection result of the temperature detecting means. And a control means for operating the device.

  In the injection molding machine according to the present invention, water, a water-soluble solution, or oil is used as the temperature control medium.

  The injection molding machine according to the present invention is an injection molding machine comprising a hopper for supplying a resin material and a hydraulic pump for driving the injection molding machine, and a cooling fan for cooling the hydraulic oil of the hydraulic pump. And a conduit for introducing exhaust heat exhausted to the rear of the cooling fan into the hopper, and drying or keeping the temperature of the resin material in the hopper by the exhaust heat.

  The injection molding machine according to the present invention is a support member for supporting the heating and melting part in an injection molding machine including a hopper for supplying a resin material and a heating and melting part for heating and melting the resin material, A support member having a flow path for passing air; and a conduit for introducing air heated by the heat from the heating and melting portion into the hopper by passing through the flow path. The resin material in the hopper is dried or kept warm by the air.

  In the injection molding machine according to the present invention, the air temperature is controlled by adjusting the flow rate of the air.

  According to the present invention, energy saving and space saving can be achieved when temperature control of each part of an injection molding machine is performed.

  Hereinafter, preferred embodiments of the present invention will be described.

  First, an outline of the present embodiment will be described.

  In the present embodiment, the material supply unit, the heating unit for melting the material, the injection mechanism unit for injecting the molten material, the mold clamping mechanism unit to which the mold is attached, and the drive for driving the injection mechanism and the mold clamping mechanism unit In the injection molding machine having a heating cylinder having a cylindrical shape and a heating cylinder having a heat source inside or outside thereof, and having a portion in contact with outside air, the outer periphery of the heating cylinder A container made of a material such as copper, aluminum, or stainless steel is brought into contact with the portion, and a temperature control medium such as water, a water-soluble solution, or oil is sealed in the container.

  In the above configuration, the waste heat can be efficiently transferred to the container and transmitted to a temperature control medium such as water, a water-soluble solution, or oil in the container, so that an energy saving effect can be obtained because there is no heat source.

  In addition, the container and the cooling device such as a mold and a radiator are communicated with each other, and a thermocouple is installed in the container to communicate with the temperature controller.

  In the above configuration, the temperature information of the medium in the container can be managed.

  In addition, the temperature controller and the relay are communicated, and the fan such as the radiator is turned off when the relay is turned on, or the microcomputer or the sequence is programmed so that the fan such as the radiator is turned on when the relay is turned off. The medium inside is kept at a constant temperature.

  In the above configuration, the mold can be kept at a constant temperature by keeping the temperature of the medium supplied to the mold constant.

  Further, in an injection molding machine having a hydraulic pump for driving the injection molding machine, exhaust heat exhausted behind a cooling fan for cooling the hydraulic oil of the hydraulic pump is passed through the hopper.

  In the above configuration, the material can be dried and kept warm by the exhaust heat that has become high temperature. In addition, in an injection molding machine having a heating part for melting the material, the air exhausted becomes high temperature by passing the air through the flow path processed into the support member that supports the heating cylinder for melting the material. Pass through.

  In the above-described configuration, the material can be dried and kept warm by the high-temperature air.

  Air is compressed air such as factory air or air obtained from a self-installed air compressor, and this flow rate is adjusted.

In the above configuration, the temperature can be controlled by adjusting the flow rate of air. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(First embodiment)
FIG. 1 is a diagram showing the configuration of an injection molding machine according to the first embodiment of the present invention.

  In FIG. 1, 1 is a heating cylinder provided in an injection molding machine for heating and melting a resin material for molding, 2 is a mold for molding, and 3 is disposed so as to be in contact with and adjacent to the heating cylinder 1. A container capable of receiving waste heat from the cylinder 1, 4 is a temperature detector for detecting the temperature in the container 3, 5 is a temperature controller for controlling the temperature of the mold, 6 is a relay, 7 is It is a radiator (fan) for cooling the temperature control medium 22 in the container 3.

  In the above configuration, the temperature control medium 22 such as water, a water-soluble solution, or oil is placed inside the container 3 made of a material such as copper, aluminum, and stainless steel so that the waste heat from the heating cylinder 1 can be stored. The temperature adjusting medium 22 heated by the waste heat from the heating cylinder 1 in the container 3 is caused to flow through the fluid passage in the mold 2 by the hose 20, and the temperature of the mold 2 is adjusted by the temperature adjusting medium 22. Moreover, the temperature control medium 22 in the container 3 is guided to the radiator 7 by the hose 24, and is cooled to a necessary temperature when the temperature control medium 22 becomes too high. A temperature detector 4 such as a thermocouple is inserted in the container 3, and is connected to the temperature controller 5, the relay 6, and the fan of the radiator 7 by conducting wires.

  As a result, when the temperature of the medium in the container 3 rises above the temperature set by the temperature controller 5, the temperature information is transmitted from the temperature detector 4 to the temperature controller 5, and an instruction is issued to the relay 6. A command is issued from the relay to the fan, the fan rotates, and the temperature control medium 22 is cooled by the radiator 7. If the temperature of the temperature control medium 22 detected by the temperature detector 4 is within the set temperature range, the fan does not rotate because no instruction is issued from the temperature controller 5 to the relay 6. In this case, the waste heat of the heating cylinder 1 continues to be transmitted to the temperature control medium 22 via the container 3.

  As described above, according to the present embodiment, the temperature control function of the mold that has been performed by a unit different from the injection molding machine can be provided on the injection molding machine side, and the waste heat from the injection molding machine can be reduced. Since the temperature of the mold can be controlled by using it, energy and space saving effects can be obtained.

(Second Embodiment)
FIG. 2 is a diagram showing a partial configuration of an injection molding machine according to the second embodiment of the present invention. In FIG. 2, 8 is a support member such as a jacket that supports a resin heating cylinder, 9 is a hopper for charging a resin material, and 10 is a flow controller.

  In the above configuration, after the compressed air is taken in from the inlet A1 of the hose 26 on the upstream side of the flow rate regulator 10 and the flow rate is adjusted by the flow rate regulator 10, Supply compressed air. Since the waste heat from the heating cylinder is applied to the support member 8, the compressed air is heated. By discharging the heated compressed air from the discharge port A2 of the support member 8, high-temperature compressed air can be obtained. The compressed air from the discharge port A2 is supplied to the hopper 9, and the material is dried and kept warm. The temperature of the compressed air can be freely changed by adjusting the air flow rate with the flow rate regulator 10.

  According to this embodiment, since the resin material can be dried and kept warm using waste heat from the injection molding machine, energy saving and space saving effects can be obtained.

(Third embodiment)
FIG. 3 is a diagram showing a partial configuration of an injection molding machine according to the third embodiment of the present invention. In FIG. 3, 7 is a cooling fan for cooling the hydraulic oil of the hydraulic pump in the injection molding machine, 9 is a hopper for charging a resin material, 11 is a dust collector, and 10 is a flow controller.

  In the above configuration, by installing the dust collector 11 behind the cooling fan for cooling the hydraulic oil of the hydraulic pump 7, it is possible to collect high-temperature air by the cooling fan. This is supplied to the hopper 9 to dry and keep the material warm. The air temperature can be freely changed by adjusting the air flow rate with the flow rate regulator 10.

  According to the present embodiment, since the resin material can be dried and kept warm using waste heat from the injection molding machine, as in the second embodiment, energy saving and space saving effects can be obtained. can get.

  As described above, according to the first embodiment, when the mold temperature control is performed, the waste heat generated by the injection molding machine itself is used without having a dedicated heat source. is there.

  Further, since the function is incorporated in the injection molding machine instead of a separate unit, space saving can be achieved, and the operation is simple and inexpensive.

  In addition, when performing mold temperature control, information management of the temperature control medium such as water, water-soluble solution, or oil in the container and the cooling device such as the mold and the radiator can be managed on the injection molding machine side.

  In addition, when performing mold temperature control, the temperature of the temperature control medium such as water, water-soluble solution or oil in the container can be maintained at the constant temperature on the injection molding machine side. Since the conditioning medium can be supplied to the fluid passage of the mold, the mold temperature can be accurately controlled. In addition, since the operation can be performed not on a separate unit but on the injection molding machine side, the operability is improved.

  Further, according to the second embodiment, by passing air through the flow path processed into the support member that supports the heating cylinder that melts the material, the exhausted air becomes high temperature, and this air is passed through the hopper. The material can be dried and kept warm.

  Further, according to the third embodiment, the exhaust heat exhausted to the rear of the cooling fan that cools the hydraulic oil of the hydraulic pump is passed through the hopper, whereby the material can be dried and kept warm.

  In the second and third embodiments, the air is air obtained from factory air or a self-installed air compressor, and the temperature of the air can be freely controlled by adjusting this flow rate.

  In the first to third embodiments, when the outside air temperature is low, immediately after the operation of the injection molding machine is started, or when molding is performed at a high molding condition, waste that is a heat source for mold temperature control and material drying is used. It can be complemented by diverting heat to each other.

It is a figure which shows the structure of the injection molding machine concerning the 1st Embodiment of this invention. It is a figure which shows the structure of a part of injection molding machine concerning the 2nd Embodiment of this invention. It is a figure which shows the structure of a part of injection molding machine concerning the 3rd Embodiment of this invention. It is a figure which shows a prior art example. It is a figure which shows a prior art example. It is a figure which shows a prior art example.

Explanation of symbols

1 Heating cylinder 2 Mold 3 Container 4 Temperature detector 5 Temperature controller 6 Relay 7 Radiator (fan)
DESCRIPTION OF SYMBOLS 8 Support member 9 Hopper 10 Flow controller 11 Dust collector 12 Injection molding machine main body 13 Mold temperature control unit 14 Material drying unit A1 Inlet A2 Discharge port 32 Heating cylinder 37 Mold 15 Insulation zone 16 Blower path 16a Fan 19 Exhaust fan 20, 24, 26, 28 Hose 22 Temperature control medium

Claims (6)

In an injection molding machine comprising a heating and melting part for heating and melting a resin material, and a mold for molding the resin material,
A container that is disposed adjacent to the heating and melting portion and contains a temperature control medium for controlling the temperature of the mold;
A conduit for introducing a temperature control medium heated by heat from the heating and melting section in the container into the mold;
An injection molding machine comprising:   The apparatus further comprises temperature detection means for detecting the temperature of the temperature control medium, cooling means for cooling the temperature control medium, and control means for operating the cooling means based on the detection result of the temperature detection means. The injection molding machine according to claim 1.   The injection molding machine according to claim 1, wherein water, a water-soluble solution, or oil is used as the temperature control medium. In an injection molding machine comprising a hopper for supplying a resin material and a hydraulic pump for driving the injection molding machine,
A cooling fan for cooling the hydraulic oil of the hydraulic pump;
A conduit for introducing exhaust heat exhausted to the rear of the cooling fan into the hopper,
An injection molding machine characterized in that the resin material in the hopper is dried or kept warm by the exhaust heat. In an injection molding machine comprising a hopper for supplying a resin material and a heating and melting part for heating and melting the resin material,
A support member for supporting the heating and melting part, and a support member having a flow path for passing air;
A conduit that introduces air heated by heat from the heating and melting part into the hopper by passing through the flow path;
An injection molding machine, wherein the resin material in the hopper is dried or kept warm by the heated air.   The injection molding machine according to claim 4 or 5, wherein the temperature of the air is controlled by adjusting the flow rate of the air.

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