JP4798804B2 - Resin temperature measuring device - Google Patents

Description

  The present invention relates to a resin temperature measuring device at the time of molding in an injection molding machine, an extrusion molding machine or the like.

As a conventional resin temperature measuring device, a molten resin introduction hole that comes into contact with the nozzle port of the injection device, and a molten resin that is connected to the introduction hole and the outflow hole, inside the main body of a cylindrical or block-shaped single member A path is formed by drilling from the side of the main body, and on the axis of the introduction hole separating the molten resin path, a temperature sensor is installed with the thermal terminal facing the molten resin flow direction, and the main body is an adapter. There is known a structure in which the rear end is connected to a mold, or is used by being fixed to a mold mounting board by a mold plate that is held via a locating ring that has a main body attached to a back portion with a connecting pin.
JP 10-217305 A

  In the conventional apparatus in which the main body is composed of a single member, since the molten resin path connected to the introduction hole and the outflow hole is formed by drilling from the side of the main body, it takes time to form the molten resin path. Since the molten resin path is formed by crossing, the flow resistance is large, and if resin adheres to the road wall surface at the intersection, resin builds up there, further increasing the flow resistance, and the flow rate and pressure fluctuate during measurement. Accordingly, the measurement of the resin temperature becomes unstable, and there is a problem that it is difficult to continuously measure the temperature of the molten resin injected as the screw advances.

  This variation in measurement due to resin deposition is solved by cleaning the molten resin path and removing the adhered resin, but the cleaning is done by removing the screw lid at the hole end of each perforation and placing a cleaning rod in the hole. It must be inserted, and is troublesome because there is an operation to close the perforation with a screw lid after cleaning. For this reason, periodic cleaning may be neglected and measurement may be hindered.

  Also, in the molten resin path by drilling, since the screw cap screwing allowance is required, the main body tends to be large as a measuring device, and its use is also measured by installing a locate ring on the mold mounting board. Since it is necessary to remove the mold and prepare for measurement, the resin temperature to be measured may be different from that during molding. In addition, even if the product is mounted on a mold, the mold is removed, the sprue bushing is replaced with a threaded bush, and the rear end of the main body is screwed into the bush after mounting the mold. It takes time to prepare as well.

  In the case of using an air-operated shut-off valve for opening and closing the outflow hole, the air cylinder of the drive source is provided close to the mold plate on the rear surface of the locate ring. Depending on the size of the opening in the center of the mounting board, the air cylinder may not fit within the opening and may not be used.

  The present invention has been conceived in order to solve the above-mentioned problems of the conventional apparatus, and its object is to form the main body by a joined body of a pair of front and rear circular disks, and a molten resin path on the joining surface of the front and rear members. As a result, it is easy to assemble and disassemble, clean the molten resin path easily, and create a new molten resin temperature that can form a molten resin path with almost no fluctuations in flow rate or pressure due to resin adhesion and deposition. It is to provide a measuring device.

  In addition, the present invention adopts a circular disk as the installation panel at the rear of the main body, and installs the device in the central opening of the mold mounting panel by inserting and locking the installation panel into the locating hole so that the injection can be performed without removing the mold. An object of the present invention is to provide a new molten resin temperature measuring apparatus that can measure the temperature of the molten resin while facing the apparatus.

  According to the above-mentioned object, the present invention provides a molten resin introduction hole that is brought into contact with the nozzle opening of the injection apparatus, a main body having a molten resin passage connected to the introduction hole and the outflow hole, and a molten resin passage in the main body. On the axis of the introduced hole, the resin temperature measuring device comprising a temperature sensor provided with a thermal terminal facing the molten resin in the flow direction, the main body is constituted by a joined body of a pair of front and rear plate members, The front member is provided with the introduction hole and the outflow hole, while the rear member is provided with a sensor mounting hole on the axis of the introduction hole, and is bent from both sides of the introduction hole on either or both of the front and rear members. Then, a branching groove connected to the outflow hole is formed from two directions, and the branching groove is closed with a joint surface to form the molten resin path.

  The outflow hole is formed by an inclined hole formed in the lower member of the introduction hole from the joint surface to the lower outer side, and a shut-off nozzle that opens by the resin pressure at the outlet of the outflow hole is obliquely removed. The shut-off nozzle is obliquely installed in front of the main body.

  The main body includes a circular installation board connected by bolts provided through a support rod at the rear part of the main body, and the installation board has a diameter that can be inserted into a locating hole of the mold mounting board.

  In the above configuration, by joining the front and rear members constituting the main body, the branch groove formed on the joint surface is closed by the joint surface, bent from both sides of the introduction hole, and into the molten resin path that is continuous from the left and right directions to the outflow hole. Since the molten resin from the introduction hole hits the temperature sensitive terminal, it flows into the outflow hole after separating from the curved molten resin path on both sides, so there is almost no fluctuation in speed and pressure due to flow resistance, and the temperature Since the measurement is performed by sensing the center temperature of the molten resin flow, it is possible to accurately grasp the state of the resin temperature.

  In addition, the main body is composed of an assembly of circular discs, and a circular disc is used for the installation panel, so the overall device is compact and the installation panel can be used by inserting it into the locating hole of the mold mounting plate. The resin temperature can be measured with the mold mounted on the mold mounting board, and it does not take time to prepare for the measurement. There will be no reduction in efficiency.

  In addition, when the shut-off nozzle is obliquely installed in front of the main body, even if the mold clamping device has a narrow central opening in the mold mounting board, the position of the shut-off nozzle is outside the board and the outlet is located away from the mold mounting board. The shut-off nozzle does not interfere with the installation of the apparatus.

  Also, since the branched groove formed on the joint surface of the front and rear members is closed by the joint surface, a through hole drilled vertically and horizontally from the outside of the main body is formed in the molten resin passage by closing the hole end. The molten resin path can be formed more easily than the case, and even when the main body is assembled, the front and rear members only have to be joined and fastened together. Cleaning is easy, and even if resin adheres to the flow path wall surface, the branch groove is bent, so that it can be removed neatly.

  In the figure, reference numeral 1 denotes a main body having a band heater attached to the outer periphery, and is composed of a joined body in which a pair of front and rear members 11 and 12 by a circular disc are fitted to each other and are integrally adhered by a bolt 13. 2 is a shut-off nozzle attached to the lower side of the main body, 3 is an installation panel at the rear of the main body, and comprises a circular disk connected to the rear member 12 by a plurality of hollow support rods 4 and bolts 5 inserted into the rods, The circular plate has a diameter that can be inserted into the locating hole 6a of the die mounting plate 6 shown in FIG.

  The front member 11 is a thick-walled board having a mating convex edge formed on the rear surface as a joining surface, and a molten resin introduction hole 14 and an outflow hole 15 are provided in the board. Is formed with a branch groove 16 'bent from both sides of the introduction hole 14 and continuing to the outflow hole 15 from two directions. A mounting hole 18 for the temperature sensor 7 for measuring the body temperature by a thermocouple or the like is drilled in the upper part of the panel body, and a number of bolt holes 11 'are drilled at equal intervals inside the periphery of the panel body. is there.

  The introduction hole 14 includes a through hole of the sprue bush 17 at the center of the board body that is fitted to the joint surface from the front surface of the board body, and the branch groove 16 ′ is formed from both sides of the through hole by notching both ends of the sprue bush 17. Up to the outflow hole 15 is formed. The outflow hole 15 is an inclined hole formed at a 45 ° angle from the joint surface to the outside of the lower side surface in the lower body of the introduction hole 14.

  The rear member 12 is a thick wall body formed around the front surface serving as a joint surface with a mating edge, and a resin temperature such as an infrared radiation detection type installed on the axis of the introduction hole 14 at the center of the body body. A mounting hole 19 for the temperature sensor 8 for measuring the degree is formed by drilling from the rear surface to the joint surface. The opening 19a in the joint surface of the sensor mounting hole 19 is formed to have a small diameter enough to fit the temperature sensitive terminal 8a of the temperature sensor 8. Further, the rear member 12 has the same number of bolt holes 12 'as the bolt holes 11' of the front member 11, and the bolt holes 5 'of the bolts 5 are formed on the rear surface. .

  The front member 11 and the rear member 12 are integrated by fitting the rear surface and the front surface so that the joint surfaces are in close contact with each other, and tightening with bolts 13 screwed to the front member 11 from the rear surface of the rear member 12. Then, with the joined body as the main body 1, the heat insulating plate 9 is attached to the rear surface of the main body, the band heater is attached, the installation board 3 is connected, and the shut-off nozzle 2 is attached.

  In the main body 1 by this joined body, the branch groove 16 ′ on the joining surface of the front member 11 is blocked by the joining surface of the rear member 12 by joining the front and rear members, and is bent from both sides of the introduction hole 14 and from the left and right directions. It becomes a molten resin passage 16 connected to the outflow hole 15. In the molten resin passage 16 branched in these two directions, the molten resin from the introduction hole 14 flows into both the molten resin passages 16 after striking the temperature sensitive terminal 8a, and also flows into the outflow hole 15 along the curved surface. The flow will be smooth.

  The shut-off nozzle 2 includes a valve body 22 and a spring coil 23 for compression in a nozzle cylinder 21 having a band heater attached to the outer periphery, and the coil spring 23 causes the valve body 22 to be inclined on the inflow side. With a normal structure in which the valve is kept closed constantly, with the outflow port on the bottom, the inflow side is screwed to the exit of the outflow hole 15, and the same angle as the outflow hole 15 is obliquely outwardly downward. Installed and tilted forward of the body.

  In this shut-off nozzle 2, the valve element 22 is pressurized by the resin pressure of the molten resin passage 16 to compress the coil spring 23 and automatically open to open the outflow passage 15. Therefore, a shut-off mechanism by an air cylinder is used. There is no need to perform the valve opening operation, and the molten resin in the molten resin passage 16 is immediately discharged from the lower nozzle port to the resin receptacle (not shown) by opening the valve, so that the molten resin is removed after the nozzle touch. The resin temperature can be measured simply by injection.

  FIG. 4 shows another embodiment in which a branch groove 16 ′ for forming the molten resin passage 16 is provided on the joint surface of the rear member 12 and the shut-off nozzle 2 is vertically attached to the lower side of the main body. .

  The branch groove 16 'has a contact portion of the introduction hole 14 of the front member 11 as the center, and is bent from both sides to the contact portion of the outflow hole 15 formed in the front member 11 from two directions. An opening 19 a of a sensor mounting hole 19 is formed in the center of 16 ′ so that the temperature sensitive terminal 8 a of the temperature sensor 8 can be installed on the axis of the introduction hole 14 separating the molten resin passage 16.

  Although not shown in the drawing, the molten resin passage 16 may be formed by providing the joint surface branch grooves 16 ′ of both the front and rear members 11, 12. In this case, the same function as in the above embodiment is achieved.

  In the molten resin temperature measuring apparatus having the above-described configuration, the main body 1 is formed of a joined body of circular disks, and the circular disk is adopted as the installation board, so that the overall size becomes compact. Therefore, as shown in FIG. The board 3 can be used by being inserted into the locating hole 6a of the die mounting board 6. The apparatus can be used by inserting the installation board 3 into the locating hole until it comes into contact with the locating ring 10a fitted in the locating hole 6a, and the apparatus can be moved into the opening of the die mounting board 6 by the locking of the installation board 3 by the locating hole 6a. Therefore, the centering with the nozzle can be easily performed.

  Accordingly, since the mold 10 can be used in a state where it is mounted on the mold mounting board 6, in preparation for measurement, the injection device 7 is moved backward, the device is inserted and held in the locating hole 6a, and then the injection device 7 is moved forward again to move the nozzle. Since it is only necessary to touch, and preparation for measurement does not take time, even if it is necessary to check the resin temperature during the molding process from the quality of the molded product, measurement can be performed with a short molding stop, so the measured resin The temperature is not different from that during molding, and the efficiency of molding operation is not significantly reduced due to molding stoppage.

  Further, when the shut-off nozzle 2 is obliquely arranged in front of the main body, even if the central opening of the mold mounting board 6 is narrow, the position of the shut-off nozzle 2 is out of the board and the outlet is located away from the mold mounting board 6. Therefore, if the central opening is an opening in a range in which the main body 1 can be inserted, it can be adopted for measuring the resin temperature.

  Further, since the sensor mounting hole 19 is located on the axis of the introduction hole 14 across the molten resin path 16, the thermal terminal 8a of the temperature sensor 8 mounted therein is also accommodated in the opening 19a and faces the flow direction of the molten resin. Therefore, the temperature measurement is performed by sensing the center temperature of the flow of the molten resin, so that the fluctuation of the resin temperature can be accurately grasped.

  In any of the above-described embodiments, the main body 1 is constituted by a pair of front and rear disk-shaped members 11 and 12, and the branch groove 16 ′ provided on one of the front and rear members 11 and 12 is blocked by the joint surface. Then, since the molten resin passage 16 that is continuous from the introduction hole 14 to the outflow hole 15 is formed, the molten resin passage 16 is melted more than in the case where the through-hole drilled vertically and horizontally from the outside of the main body is formed in the molten resin passage by closing the hole end. The resin path 6 can be easily formed, and even when the main body 1 is assembled, the front and rear members 11 and 12 need only be joined together and bolted together.

  Further, since the branch groove 16 'is exposed on the joint surface by disassembly, the molten resin passage 16 can be easily cleaned, and the resin adhering to the flow path wall surface can be removed neatly because the branch groove 16' is bent. With proper cleaning, the flow velocity and pressure that affect the measurement of the resin temperature can be maintained as set, and a highly accurate thermometer can be used even for long-term use.

It is a vertical side view of the molten resin temperature measuring apparatus concerning this invention. It is the rear view (A) of a front member, and the front view (B) of a rear member. It is explanatory drawing of a use state. It is a vertical side view of the molten resin temperature measuring device by other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Shut off nozzle 3 Installation board 4 Supporting rod 5 Bolt 6 Type mounting board 6a Locating hole 8 Temperature sensor 8a Temperature sensing terminal 11 Front member 12 Rear member 14 Introduction hole 15 Outflow hole 16 Molten resin path 16 'Branch groove 17 Sprue Bush 19 Sensor mounting hole 19a Open

Claims (3)

On the axis of the introduction hole separating the molten resin passage of the main body, the main body having the molten resin introduction hole abutting on the nozzle port of the injection device, the molten resin passage connected to the introduction hole and the outflow hole inside In the resin temperature measuring device comprising the temperature sensor provided with the thermal terminal facing the molten resin in the flow direction,
The main body is constituted by a joined body of a pair of front and rear disk-shaped members, and the front member is provided with the introduction hole and the outflow hole, while the rear member is provided with a sensor mounting hole on the axis of the introduction hole. Formed on either or both joint surfaces from both sides of the introduction hole is formed a branch groove continuous from the two directions to the outflow hole, and the branch groove is blocked by the joint surface to form the molten resin passage. A resin temperature measuring device.   The outflow hole is a slant hole formed in the lower member of the introduction hole from the joint surface to the lower outer side, and a shut-off nozzle that is opened by resin pressure at the outlet thereof is directed obliquely outward. 2. The resin temperature measuring device according to claim 1, wherein the resin temperature measuring device is attached and the shut-off nozzle is provided obliquely forward of the main body.   The said main body is equipped with the circular installation panel connected with the bolt provided in the rear part of the main body through the support rod, The installation panel consists of a diameter which can be inserted in the locating hole of a type | mold mounting board. Resin temperature measuring device.

Images