JP4359332B1 - Heat block, hot platen, and press device - Google Patents

Abstract

The present invention relates to a heat block, a hot platen, and a press device for efficiently heating a mold or the like.
A heat block 1 according to the present invention includes a metal block 3 having an insertion hole 2 which is formed in a rectangular parallelepiped shape so as not to penetrate from a lower surface 3a to an upper surface 3b. A cylindrical heating pin 4 detachably attached, a coil heater 5 having a heating part 5 a formed in a coil shape and wound around the outer peripheral surface of the heating pin 4, and the heating pin 4. A temperature sensor 6 for measuring the temperature of the heating pin 4, a controller 7 connected to each of the coil heater 5 and the temperature sensor 6 and controlling the temperature of the heating pin 4 to a preset temperature set in advance. And.
[Selection] Figure 3

Description

  The present invention relates to a heat block, a hot platen, and a press device for efficiently heating a mold or the like.

  Conventionally, when molding a resin product or the like with a mold, the mold is attached to the press plates provided on the upper and lower sides of the press device, a synthetic resin is added to the mold, and the mold is heated at a predetermined temperature. While pressing, resin products were molded. However, when the mold is heated to a predetermined temperature, a large amount of power is consumed and a long time is required. Further, there is a problem in that defects in resin molds are likely to occur due to spots in the mold temperature, yield decreases, and labor costs are required to inspect the defects.

  And in order to solve such a problem, the heater which is incorporated in the molding die is divided into a plurality of parts in the height direction, and a mechanism for individually controlling the temperature of the partial heater constituting each divided part. A provided molding die has been devised (for example, Patent Document 1).

JP 09-109247 A

  However, in the above-described molding mold, the mold is not efficiently heated, and it takes a long time to consume a large amount of power in order to heat the mold to a predetermined temperature. Could not solve the problem.

  The present invention has been made for the purpose of solving the various problems as described above, and provides a heat block, a hot platen, and a press device for efficiently heating a mold or the like. is there.

  In order to achieve the above object, the heat block according to claim 1 is inserted into the insertion block and a metal block having an insertion hole formed in a rectangular parallelepiped shape so as not to penetrate from the lower surface to the upper surface. A columnar heating pin that is detachably attached, a coil heater that is formed in a coil shape and that is wound around the outer peripheral surface of the heating pin, and measures the temperature of the heating pin that is mounted on the heating pin A temperature sensor that controls the temperature of the heating pin to a preset temperature connected to each of the coil heater and the temperature sensor.

  The heat block according to claim 2 is characterized in that the heating pin is screwed into the insertion hole.

  In the heat block according to claim 3, a wiring groove for passing the coil heater and the wiring of the temperature sensor is formed on the lower surface of the block from the insertion hole to the side surface direction of the block. It is a feature.

According to a fourth aspect of the present invention, there is provided a hot platen formed by arranging a plurality of heat blocks according to any one of the first to third aspects .

  The hot platen according to claim 5 is characterized in that a gap heat insulating material is interposed between the adjacent blocks.

  The hot platen according to claim 6 is characterized in that an outer heat insulating material is provided on a side surface of the exposed block among the plurality of the heat blocks arranged.

  The heat plate according to claim 7 is characterized in that a metal heat plate base formed in a plate shape via a lower heat insulating material is provided below the plurality of heat blocks arranged.

The press device according to claim 8, wherein the upper pressing plate provided on the upper side and the lower pressing plate provided on the lower side sandwich and press the object from above and below, and the upper pressing plate, The hot platen according to any one of claims 4 to 7 is provided on the lower pressing plate.

  According to a ninth aspect of the present invention, there is provided a pressing apparatus including a mounting hole for mounting a die on the upper surface of the block.

  In the heat block according to claim 1, a coil heater having a heating portion formed in a coil shape is wound around a cylindrical heating pin, and the coil heater is inserted into an insertion hole provided in the block. Thereby, since the contact area of a coil heater and a heating pin becomes large, the said heating pin can be heated efficiently and the temperature increase rate can be improved. And this heat can be efficiently transmitted from the heated heating pin to the metal block having a high three-dimensional thermal conductivity in a radial manner. In addition, a temperature sensor for measuring the temperature of the heating pin is attached to the heating pin, and connected to each of the temperature sensor and the coil heater, and includes a control unit that controls the temperature of the heating pin to a preset temperature set in advance. is doing. Thereby, while being able to adjust the temperature of a heating pin to desired temperature reliably, the temperature of the upper surface of the block in which the said heating pin is inserted can also be heated to the temperature similar to setting temperature. Thus, by using the heat block which concerns on this invention, since the upper surface of the block of the said heat block can be heated efficiently, it can contribute to energy saving. In addition, since the upper surface of the block can be efficiently heated, the working efficiency can be improved.

  In the heat block according to the second aspect, since the heating pin is screwed into the insertion hole, the heating pin can be easily attached to and detached from the block. As a result, even when the thermocouple attached to the heating pin and the coil heater are defective, such as disconnection, the heating pin can be removed from the insertion hole of the block and replaced. Easy.

  According to a third aspect of the present invention, a wiring groove for passing the coil heater and the wiring of the temperature sensor is formed on the lower surface of the block from the insertion hole to the side surface of the block. As a result, when the heat block is placed on a table or the like, the wiring of the coil heater and the temperature sensor is not sandwiched between the table and the block, thereby preventing the wiring from being disconnected. can do.

  According to the hot platen of claim 4, since the hot plate is formed by arranging a plurality of the heat blocks, the hot plate can be formed in a desired shape and size by appropriately combining the heat blocks. it can. Since the heating plate formed as described above can control the set temperature of the heating pin for each heat block, the temperature spots on the heating plate surface formed by the upper surfaces of a plurality of blocks should be made extremely small. Can do. Furthermore, it is possible to change the temperature according to the location of the hot platen surface, making it easy to mold complex resin products and the like, and making this a know-how can prevent imitation of other companies. And as mentioned above, by efficiently heating the upper surface of each heat block, the energy required to heat the hot platen can be greatly reduced compared to the conventional one, and the heating rate of the hot platen surface It is also possible to improve work efficiency. And the defect of the resin product etc. by the temperature spot of a heat | fever board surface does not arise, a yield can be improved, and the labor cost for inspecting these can also be reduced.

  According to the hot platen of claim 5, since the gap heat insulating material is interposed between the adjacent blocks, the blocks of the adjacent heat blocks are not in direct contact with each other, and further, the gap heat insulating material This restricts the passage of heat between the heat blocks. Therefore, since the temperature control of one heat block is not interfered with other adjacent heat blocks, the temperature control of the upper surface of each heat block can be accurately performed. Therefore, when the set temperature of the heating pin of each heat block is set to the same temperature, the temperature spot on the surface of the heating plate can be made extremely small, and the set temperature of the heating pin of each heat block can be set to a different temperature. Even when set to, the temperature of the upper surface of each heat block can be accurately controlled.

  According to the hot platen of the sixth aspect, an outer heat insulating material is provided on a side surface of the exposed block among the plurality of the heat blocks arranged. Thereby, heat dissipation from the side surface of the block can be prevented, temperature control of the upper surface of the block of the heat block can be performed more accurately, and contribution to energy saving can be achieved.

  According to the heat plate of claim 7, since the metal heat plate base formed in a plate shape via the lower heat insulating material is provided below the plurality of arranged heat blocks, the heat plate The heat block is not in direct contact with the table or the like, and further, the heat transfer between the heat block and the table is restricted by the lower heat insulating material. Thereby, the heat of the heat block is not directly transmitted to the table or the like, and the table or the like is not affected by heat such as deformation of the table due to heat. Furthermore, heat dissipation from the lower surface of the block can be prevented, contributing to energy saving, and temperature control of the upper surface of the block of the heat block can be performed more accurately.

According to the press apparatus of Claim 8, the hot platen of any one of Claims 4 thru | or 7 is provided in the said upper side press plate and the said lower side press plate. Therefore, if the press device according to the present invention is used, when molding a resin product or the like, the resin product or the like is not defective due to temperature spots on the hot platen surface, the yield can be improved, and these are inspected. Labor costs can be reduced. Furthermore, since the upper surfaces of the blocks of the plurality of heat blocks constituting the heating plate can be efficiently heated, it is possible to contribute to energy saving.

  According to the press apparatus of Claim 9, the upper surface of the said block is equipped with the attachment hole for metal mold | die attachment. Thereby, since a metal mold | die can be easily attached to an upper side press plate and a lower side press plate via a hot platen, the preparatory work at the time of shape | molding resin products etc. is easy.

  The best embodiment of the heat block in the present invention will be described below. The heat block 1 of the present invention, as shown in FIGS. 3 to 5, includes a metal block 3 having an insertion hole 2 provided non-penetrating in the direction of the upper surface 3 b from the lower surface 3 a formed in a rectangular parallelepiped shape, A cylindrical heating pin 4 removably attached to the insertion hole 2; a coil heater 5 having a heating portion 5a formed in a coil shape and wound around an outer peripheral surface 4a of the heating pin 4; The temperature sensor 6 for measuring the temperature of the heating pin 4 mounted on the pin 4, the coil heater 5, and the temperature sensor 6 are connected to the temperature sensor 6 and set to a preset temperature. And a control unit 7 for controlling.

  As shown in FIGS. 3 to 5, the block 3 is a metal member formed in a rectangular parallelepiped shape, and an insertion hole 2 is provided in the lower surface 3a so as not to penetrate from the lower surface 3a to the upper surface 3b. It has been. A female screw 2a is formed in the back of the insertion hole 2, and the back side is formed in a conical shape.

  As shown in FIGS. 3 and 4, the heating pin 4 is formed in a columnar shape, and a lower end portion of the heating pin 4 holds the heating portion 5 a of the coil heater 5 wound around the outer peripheral surface 4 a of the heating pin 4. For this purpose, a locking portion 4b that protrudes outward from the outer peripheral surface 4a of the heating pin 4 is provided. A male screw 4 c is formed on the tip side of the heating pin 4 and is detachably screwed into the insertion hole 2. Further, a conical contact portion 4d is formed at the tip of the heating pin 4, and the heating pin heated by the contact portion 4d coming into contact with the inner peripheral surface of the insertion hole 2 together with the male screw portion 4c. 4 heat can be efficiently transferred to the block 3. And since the heating part 5a of the coil heater 5 is wound around the heating pin 4, the heating part 5a does not interfere with the inner peripheral surface of the insertion hole 2 when the heating pin 4 is screwed into the insertion hole 2. Therefore, as shown in FIG. 6, the diameter of the heating pin 4 is slightly smaller than the diameter of the insertion hole 2.

  As shown in FIG. 4, the coil heater 5 includes a heating unit 5 a formed in a coil shape in advance, and the heating unit 5 a generates heat when a voltage is applied. The heating unit 5a is wound around the surface 4a. And as for the heating part 5a, it is preferable that the surface of the side which contacts the outer peripheral surface 4a of the heating pin 4, ie, the inner surface 51a of the heating part 5a formed in the coil shape, is formed in planar shape, Thus, the heat generated in the heating unit 5a can be efficiently transmitted to the heating pin 4. Therefore, when attaching the coil heater 5 to the heating pin 4, in order to raise the temperature of the heating pin 4 efficiently, the inner surface 51a of the heating part 5a and the outer peripheral surface 4a of the heating pin 4 are attached in close contact with each other. It is preferred that

  The temperature sensor 6 measures the temperature of the heating pin 4 mounted on the heating pin 4, and as in the present embodiment, includes a thermocouple using the Seepeck effect and other semiconductor temperature characteristics. A well-known temperature sensor 6 such as a thermistor using a temperature sensor or a resistance temperature detector that measures the temperature of a metal to determine the temperature can be used as appropriate. As shown in FIG. 3, the temperature sensor 6 is detachably mounted in the center of the bottom portion 4 e of the heating pin 4 and measures the temperature of the heating pin 4 heated by the heating portion 5 a of the coil heater 5. can do.

  The controller 7 is connected to each of the coil heater 5 and the temperature sensor 6 via the wiring 8 and controls the temperature of the heating pin 4 to a preset temperature. And as the control part 7, the well-known temperature controller etc. which can feedback-control temperature can be used suitably. As shown in FIG. 6, when the heating pin 4 is screwed into the insertion hole 2, the bottom 4 e of the heating pin 4 is at a higher position than the lower surface 3 a of the block 3. Thus, even when the heat block 1 is placed on a table or the like (not shown), the wiring 8 of the temperature sensor 6 is prevented from being sandwiched between the table or the like and the heating pin 4 to disconnect the wiring 8. can do. Further, as shown in FIGS. 3 and 4, the coil heater 5 and the wiring 8 of the temperature sensor 6 are passed through the lower surface 3 a of the block 3 from the insertion hole 2 in the direction of the side surface 3 c of the block 3. A wiring groove 9 is formed. Therefore, even when the heat block 1 is placed on a table or the like, it is possible to prevent the wires 8 from being sandwiched between the table or the like and the block 3 and disconnecting the wires 8.

  The hot platen 10 according to the present embodiment is formed by arranging a plurality of heat blocks 1 formed as described above, for example, in a rectangular shape as shown in FIG. At that time, a plurality of heat blocks 1 are placed and fixed on a metal hot platen base 11 formed in a plate shape via a lower heat insulating material 12, and adjacent heat blocks 1 are mutually fixed. A gap heat insulating material 13 is provided in the gap.

  When the heat block 1 is attached to the hot platen base 11, as shown in FIGS. 1, 2, and 5, the lower heat insulation formed in a rectangular shape slightly smaller than the area of the lower surface 3a of the block 3 is used. The material 12 is arranged so as to correspond to each heat block 1 mounted on the hot platen base 11. As shown in FIG. 2, these lower heat insulating materials 12 are arranged with a predetermined interval between the lower heat insulating materials 12 adjacent to each other, and a lattice-shaped groove portion 14 is formed by the lower heat insulating materials 12. Has been. As shown in FIG. 3, the temperature sensor 6 and the wiring 8 of the coil heater 5 drawn from the wiring groove 9 of the heat block 1 are passed through the groove 14. Thereby, the wiring 8 can be pulled out from the groove 14 to the outside of the hot platen 10. Moreover, when arrange | positioning the lower side heat insulating material 12 to the hot platen base 11, the hot platen base 11 used when fixing the heat block 1 mounted and fixed on each lower side heat insulating material 12 is used. The lower heat insulating material 12 is arranged so that screw holes A1 and A2 respectively provided in the lower heat insulating material 12 communicate with each other.

  Then, the heat block 1 is placed and fixed on the lower heat insulating material 12 arranged on the hot platen base 11 as described above, as shown in FIGS. At this time, the screw B1 is inserted from the back surface of the hot platen base 11 into the screw holes A1 and A2 provided so as to communicate the hot platen base 11 and the lower heat insulating material 12, and provided on the lower surface of the block 3. The screw B1 is screwed into the female screw 3d. As shown in FIG. 6, the screw head D1 of the screw B1 inserted from the screw hole A1 is locked to the locking step C1 formed in the screw hole A1.

  Further, the gap heat insulating material 13 interposed in the gap between the adjacent heat blocks 1 may be attached to the side surface 3c of the block 3 with screws or the like. However, as shown in FIG. The gap heat insulating material 13 may be inserted so as to be pushed into the gaps between the adjacent heat blocks 1 mounted and fixed to each other. And among the heat blocks 1 mounted and fixed on the hot platen base 11 in a rectangular shape, on the side surface 3c of the outermost block 3, a female screw 3e is provided as shown in FIGS. The formed outer heat insulating material 15 is screwed by the screw B2.

  In the present embodiment, as shown in FIG. 5, a total of 16 heat blocks 1 are placed and fixed, four each on one side direction and the other side direction of the hot platen base 11. The number of 1 is not limited to this. Further, in the present embodiment, a plurality of heat blocks 1 are arranged in a rectangular shape, but may be a substantially circular shape or the like, and is not limited thereto. By using the heat plate 10 as described above, the temperature of the upper surface 3b of the block 3 of the heat block 1 constituting the heat plate 10 can be accurately controlled, so that the heat plate 10 is formed by the upper surfaces 3b of the plurality of blocks 3. The temperature of the heated platen surface can be kept uniform. Moreover, the upper surface 3b of each block 3 can be efficiently heated, and energy required when heating the said hot platen surface can be reduced significantly.

  As shown in FIGS. 8 and 9, the hot platen 10 formed as described above moves an object up and down with an upper pressing plate 16 provided on the upper side and a lower pressing plate 17 provided on the lower side. Can be suitably attached to the upper pressing plate 16 and the lower pressing plate 17. Further, as shown in FIG. 7, screw holes A3, A4, A5 are provided in the hot platen 10 so as to communicate the block 3, the lower heat insulating material 12, and the hot platen base 11, and the hot platen base 11 is also provided. The screw hole A5 is provided with a locking step C2 for locking the screw head D2 of the screw B3. Therefore, as shown in FIG. 7, the screw B3 is inserted from the screw hole A3 of the block 3, passes through the lower heat insulating material 12, and the upper pressing plate 16 passes from the screw hole A5 of the hot platen base 11 having the locking step C2. The hot platen 10 can be attached to the press device 18 by screwing into the female screw E formed on each of the lower pressing plates 17.

  At this time, the wiring 8 is drawn from the wiring groove 9 of the block 3 to the groove portion 14 as shown in FIG. 7, and the wiring 8 is provided on the hot platen base 11 as shown in FIG. The wiring hole 19 is drawn to the outside of the heating plate 10 and connected to the control unit 7 inside the press device 18. In the present embodiment, the heating platen 10 is provided on both the upper pressing plate 16 and the lower pressing plate 17, but it may be attached to only one side. Moreover, in this embodiment, as shown in FIG. 8, the hot platen 10 is used as the upper pressing plate 16 and the lower pressing plate 17 of the pressing device 18. It can also be used in the heating section of other devices such as molding devices.

  Further, on the upper surface 3b of the block 3 of the heat block 1 constituting the hot platen 10, as shown in FIGS. 5 and 8, a mold (not shown) used when molding a resin product, metal or the like is used. A mounting hole 20 is formed that is used when mounting on the hot platen 10. A thread groove is formed inside the mounting hole 20 so that the mold can be screwed into the heating platen 10. By attaching the mold to the mounting hole 20, the temperature of the mold can be kept uniform without unevenness, and the temperature can be accurately changed by changing the temperature depending on the position of the mold.

  Further, in the present embodiment, as shown in FIGS. 5 and 8, the mounting holes 20 are intensively formed at the four corners of the rectangular heating plate 10, but the mounting holes 20 are formed. The position of the present embodiment is not limited to the place of the present embodiment, and can be appropriately changed according to the shape of the mold used. The heating plate 10 of the present embodiment is provided with the mounting holes 20 used when the mold is mounted as described above. However, as shown in FIG. 9, the mounting holes 20 are formed on the surface of the heating plate 10. May not be provided.

  Since the heat block 1 can be efficiently heated by using the heat block 1, the heating plate 10 using the heating block 1, and the press device 18 using the heating plate 10, The heating rate of the panel 10 can be improved, and furthermore, the energy for heating can be greatly reduced.

  The hot platen 10 according to the present invention can be used not only for a press device but also for a heating unit of other devices such as an injection molding device and an extrusion molding device.

The perspective view which shows the state which attaches a lower-side heat insulating material to a hot platen base The perspective view which shows the state by which the lower side heat insulating material has been arrange | positioned at the hotplate base The perspective view from the reverse direction of the heat block which concerns on this embodiment Side sectional view of the heat block according to the present embodiment Overall perspective view of a hot platen according to this embodiment Side sectional view of the hot platen according to the present embodiment Side sectional view of the pressing plate of the press device according to the present embodiment. Overall perspective view of press apparatus according to this embodiment Overall perspective view of a press apparatus according to another embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat block 3a Upper surface 3b Lower surface 2 Insertion hole 3 Block 4 Heating pin 5 Coil heater 5a Heating part 6 Temperature sensor 7 Control part 8 Wiring 9 Wiring groove 10 Heating board 11 Heating board base 12 Lower heat insulating material 13 Gap heat insulating material 14 Groove part 16 Upper pressing portion 17 Lower pressing portion 18 Press device 20 Mounting hole

Claims (9)

A metal block having an insertion hole provided non-penetrating from the lower surface to the upper surface from the lower surface formed in a rectangular parallelepiped shape;
A columnar heating pin removably attached to the insertion hole;
A coil heater comprising a heating portion formed in a coil shape and wound around the outer peripheral surface of the heating pin;
A temperature sensor for measuring the temperature of the heating pin attached to the heating pin;
A controller for controlling the temperature of the heating pin to a preset temperature connected to each of the coil heater and the temperature sensor;
A heat block comprising:   The heat block according to claim 1, wherein the heating pin is screwed into the insertion hole.   The wiring groove for passing the coil heater and the wiring of the temperature sensor is formed in the lower surface of the block from the insertion hole to the side surface direction of the block. Heat block. A heating plate comprising a plurality of heat blocks according to any one of claims 1 to 3 arranged side by side.   5. The hot platen according to claim 4, wherein a gap heat insulating material is interposed between the adjacent blocks.   6. The hot platen according to claim 4, wherein an outer heat insulating material is provided on a side surface of the exposed block among the plurality of the heat blocks arranged. Multiple ordered in any one of claims 4 to 6, characterized in that the metal heating plate base comprising a plate-like shape via the lower insulation material is provided below the heat block Hot plate. In a pressing device that sandwiches and presses an object from above and below with an upper pressing plate provided on the upper side and a lower pressing plate provided on the lower side,
The press apparatus according to any one of claims 4 to 7, wherein the upper pressing plate and the lower pressing plate are provided with the hot platen according to any one of claims 4 to 7.   9. The press apparatus according to claim 8, further comprising a mounting hole for mounting a die on an upper surface of the block.

Images