JP2506571B2 - Coolant circuit structure of hot plate in hot press machine - Google Patents

Description

The present invention relates to a hot press device for cooling a hot plate of a hot press device heated by an internal heater member with a cooling medium. The present invention relates to a cooling medium circuit structure for a hot plate.

[Prior Art and its Problems] Conventionally, a hot-pressing device that heats and presses a workpiece between hot plates is used for forming laminated plates such as plywood and printed boards.

Further, in the multi-stage press device, hot plates are provided in a plurality of stages and a plurality of press moldings can be performed by one pressing operation.

It is necessary to control the temperature of the hot plate in a predetermined temperature change pattern according to the work piece. Therefore, a variable heating means such as a heater is internally provided, and a cooling medium circuit for cooling is provided. Has been done.

Here, if the variable heating means and the cooling medium circuit are arranged on the same plane in the heating plate, they interfere with each other and it becomes difficult to ideally arrange them. The three-dimensional configuration is performed by shifting the heating plate in the thickness direction).

However, if the variable heating means and the cooling medium circuit are vertically displaced as described above to form a three-dimensional structure, the thickness of the hot plate becomes thicker, and as a result, the heat capacity of the hot plate increases, which results in temperature control. There is a problem that the heat energy required for the heating increases, the heating means requires a large capacity, the cost increases, and the control response deteriorates.

[Object of the Invention] In view of the above circumstances, the present invention makes it possible to arrange the variable heating means and the cooling medium circuit in the same plane in the hot plate while eliminating mutual interference as much as possible. An object of the present invention is to provide a cooling medium circuit structure of a hot plate in a hot press device, which can reduce the cost of heat energy and improve control response by making the thickness thin.

[Means for Solving the Problems] To achieve the above object, the cooling medium circuit structure of the hot plate in the hot press placement according to the present invention is inserted so as to extend from one side along one direction. A hot plate of a hot press device heated by an odd number of at least three heater members placed, the other of the hot plate being parallel to the heater member and opposite to the one side portion. At least one pair of cooling medium passages that are disposed so as to be located between the heater members that are adjacent to each other from the side portions, and that have a leading end portion that terminates on the one side portion side; and the hot plate. A communicating passage formed in the other side portion so as to penetrate along the direction intersecting with the one direction, and communicating the cooling medium passages with each other on the other side portion; One end is inserted into one of the cooling medium passages, The one end is opened near the tip and the other end is inserted into the other cooling medium passage, the other end is opened near the tip of the cooling medium passage, and the middle part is outward from the hot plate. And a shutoff means for shutting off the communication between the pair of cooling medium passages through the communication passage, and the cooling medium injected from one end of the communication passage is After passing through the cooling medium passage of one of the pair of cooling medium passages to cool the hot plate, enter from one end into the passage pipe inserted into it at the tip of the one cooling medium passage, Passing through the inside of the passage pipe, the other end of the passage pipe is led out from the other end of the passage pipe to the other end of the other cooling medium passage, and passes through the inside of the other cooling medium passage. After cooling the plate, it is led out to the communication passage communicating with it and In 却媒 body passageway, by repeating the above distribution operation, after cooling the heating plate, and characterized in that it is discharged from the other end of the communication path.

As a result, the communication passage between the cooling medium passages only needs to be provided on the side where the cooling medium passage is drilled, the space efficiency of the cooling medium circuit is improved, and the variable heating means and the cooling medium circuit are eliminated from each other's interference. It is possible to arrange them on the same plane in the heating plate.

Embodiments of the Invention Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a hot plate to which an embodiment of the present invention is applied.
(A) is a cross-sectional view corresponding to a plan view, and (B) is a front view thereof.

The heating plate 10 has a plurality of rod-shaped heaters 30 ... Inserted and installed at a right angle to the workpiece carrying-in / carrying-out direction indicated by an arrow in the figure from one side surface at a predetermined equal interval. Within the same plane as the placement plane, the placement position is exactly at the intermediate position,
The cooling medium passages 11 ... Are bored from the side surface on the side opposite to the heater 30 insertion side, and the passage pipes 20 are provided in the respective cooling medium passages 11.
Is loosely inserted and configured.

The tip of the heater 30 reaches the vicinity of the other side surface, and the depth of the cooling medium passage 11 also reaches the vicinity of the other side surface. Therefore, the heater 30 and the cooling medium passage 11 are spread over substantially the entire area of the heating plate 10.
... and are arranged alternately.

Further, the cooling medium passage 11 of the heating plate 10 ...
A communication passage 12 which is parallel to the side end surface (that is, right angle to the cooling medium passages 11 ...) Is formed through the hot plate 10 in the front-rear direction, and the communication passages 12 communicate with all the cooling medium passages 11 ... Adjacent cooling medium passages 11, 11 sharing one passage pipe 20
The plugs 12A, 12A are fitted between the cooling medium passages 11 and so that the cooling medium passages 11 are not connected to each other.

As shown in FIG. 2 which is an enlarged view of the passage pipe 20, the outer diameter of the passage pipe 20 is smaller than the inner diameter of the cooling medium passage 11 by a predetermined amount, and a fluid passage is formed between the outer peripheral wall of the passage pipe 20 and the inner wall of the cooling medium passage 11. A pipe having a predetermined diameter and a predetermined length that can be formed is formed in a U shape by bending the center line at the center portion in the longitudinal direction by 180 ° into an arc shape having a diameter equal to the drilling interval of the cooling medium passages 11 ... The fixing flanges 21 and 21 are fixedly formed at predetermined positions of the straight portions 20B and 20B near the bending ratio 20 respectively. Then, by fixing the fixing flange 21 to the side surface of the hot plate 10 with the screw 23 via the seal member 22, the respective straight line portions of the two adjacent cooling medium passages 11, 11 have their centers aligned, The tip thereof is installed at a predetermined distance from the bottom end of the cooling medium passage 11.

That is, the cooling medium passage 11 at the end in the front-rear direction communicates with the outside of the hot plate 10 through the communication passage 12, and the cooling medium passage 11
And a cooling medium passage 11 adjacent to the cooling medium passage 11 are communicated with each other by a passage pipe 20, and the cooling medium passage 11 is adjacent to the cooling medium passage 11.
11 is connected by a communication passage 12 and is formed by repeating this.

Thus, according to the above-mentioned structure, when the cooling water as the cooling medium is pressure-fed from the outside of the hot plate 10 through the communication passage 12 as shown in FIG. It flows into the passage pipe 20 from the end portion, flows into the bottom end portion of the adjacent cooling medium passage 11 via the passage pipe 20, and further adjoins via the communication passage 12 from the side end portion of the cooling medium passage 11. Flow to the cooling medium passage 11 and repeatedly flow out from the communication passage 12 at the end opposite to the cooling water press-fitting side. That is, the cooling water flows between the heaters 30 ... in a rectangular wave shape, and acts so as to efficiently absorb the heat of the hot plate 10 to cool it.

Further, in the cooling medium passage 11 in which the straight portion 20B on the right side of FIG. 1 of the passage pipe 20 is located, the cooling water is an annular passage formed first between the inner wall of the passage 11 and the outer wall of the straight portion 20B. And then passes through the internal flow path of the straight portion 20B. On the other hand, in the cooling medium passage 11 where the straight line portion 20B on the left side of FIG. 1 of the passage pipe 20 is located, the cooling water first flows through the internal flow passage of the straight line portion 20B, and then passes through the annular flow path. It is when the cooling water 10 directly touches the hot plate 10 to absorb the heat when it passes through the annular passage. Therefore, in the cooling medium passage 11 on the right side, the cooling water temperature is the lowest on the lower side in FIG. It gets higher as you go to. On the contrary, in the cooling medium passage 11 on the left side, the cooling water temperature is the lowest at the upper side and becomes higher as it goes downward. In this way, since the temperature gradient of the cooling water is reversed between the adjacent cooling medium passages 11, when viewed in the entire installation area of one passage pipe 20,
The heat absorption efficiency gradient between both cooling medium passages 11 is canceled out, and the heat plate
The cooling effect is almost the same in the vertical direction of 10 in FIG.

[Effects of the Invention] As described above, according to the present invention, it is not necessary to form a passage connected to an adjacent cooling medium passage on the side farther from the drilled side of the cooling medium passage, and the variable heating means is provided. The cooling medium circuits can be arranged on the same plane in the hot plate by eliminating interference with each other as much as possible, and the thickness of the hot plate can be made thin to reduce the cost of heat energy and control. It can contribute to the improvement of responsiveness.

[Brief description of drawings]

FIG. 1 shows a hot plate to which an embodiment of the present invention is applied (A).
Is a sectional view corresponding to a plan view, (B) is a front view thereof, and FIG. 2 is a partially enlarged sectional view thereof. 10 …… Hot plate 11 …… Cooling medium passage 12 …… Communication passage 20 …… Passage pipe 30 …… Heater (heater member)

Claims (1)

(57) [Claims] 1. A hot plate of a hot press machine heated by an odd number of heater members of at least three or more inserted so as to extend from one side along one direction. Is arranged in parallel with the heater member from the other side opposite to the one side so as to be located between the heater members adjacent to each other, and the tip end is on the one side side. At least one pair of cooling medium passages formed so as to terminate, and formed on the other side of the hot plate so as to penetrate along the direction intersecting the one direction, and each of the cooling medium passages is formed. One end is inserted into the cooling medium passage of one of the pair of cooling medium passages, and the other end is opened near the tip of the cooling medium passage. , The other end is inserted into the other cooling medium passage, near the tip of this A passage pipe whose other end is opened and an intermediate portion is taken out from the hot plate outwardly; and a shutoff means for shutting off communication between the pair of cooling medium passages via the communication passage. The cooling medium injected from one end of the communication passage passes through the inside of one cooling medium passage of a pair of cooling medium passages communicating with the communication passage, cools the hot plate, and then the cooling medium passage The other end of the passage pipe is introduced into the passage pipe inserted into the passage pipe at the tip end from one end, passes through the passage pipe, and the other end of the cooling medium passage is inserted into the passage pipe. Part of the cooling medium passage, passes through the other cooling medium passage, cools the hot plate, and then is led out to a communication passage communicating with the heating plate. After cooling the plate, discharge it from the other end of the communication passage. Coolant circuit structure of 於Ru hot plate to heat pressing apparatus, characterized in that it is.