JP2002301598A - Hot plate of press apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep quality of a laminated molding at a high level and to improve productivity. SOLUTION: An entrance passage and an exit passage for a medium are arranged side by side in a spiral shape and the entrance passage and the exit passage are connected at or near a center of a hot plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medium path for heating and cooling a hot plate in a hot plate of a press device for producing a laminated molded product.

[0002]

2. Description of the Related Art FIG. 3 is a plan sectional view of a conventional hot plate 10. As shown in FIG. The plurality of hot plates are provided between a fixed platen and a movable platen of the press device, and formed into a laminated molded product by pressing a molding material arranged on the hot plate heated or cooled by a medium with a press device. It is. The medium passage is formed by a vertical hole 11 and horizontal holes 12, 13, 14 drilled at the center of the thickness of the hot plate 10. The lateral holes 12 and 13 are perforated from both side surfaces of the hot plate 10 to the central portion, and the lateral holes 14 are perforated from one side surface of the hot plate 10 to approximately the length of a side. Twelve vertical holes 11
Is the side hole 1 from the side surface perpendicular to the side surface
Punch until communicating with 2,13. 11 vertical holes, 1 horizontal hole
After drilling holes 2, 13, and 14, a plug 17 is inserted into the vertical hole 11,
A plug 18 is inserted into the side hole 14 and a plug 21 is inserted into the side holes 12 and 13, and welded. A connecting rod 19 having a smaller diameter than the horizontal hole is fixed to the plugs 18 and 21, and a partition member 20 (slightly smaller in diameter than the horizontal hole) for partitioning the horizontal hole as a medium passage is fixed to a predetermined position of the connecting rod 19. Side hole 1
3, a medium inlet 15 is pierced at the end of the lateral hole 12, and a medium outlet 16 is pierced at the end of the lateral hole 12, and the medium flows in a direction indicated by an arrow in FIG.

[0003]

Since the conventional hot plate 10 has the above configuration, the medium flows unilaterally from one end to the other end of the hot plate, so that the temperature distribution on the hot plate surface is not uniform. Adversely affected the quality of the laminate. Furthermore, conventional hot plates require special machine tools such as gun drills for machining vertical and horizontal holes, and because of their workability, hard materials cannot be used, resulting in the problem of early wear on the hot plate surface. Was.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention is configured such that the inlet passage and the outlet passage for the medium are spirally provided side by side, and the inlet passage and the outlet passage are connected at or near the center of the hot plate. Thus, the temperature distribution on the hot platen surface becomes uniform. Further, since the hot plate was formed by casting the passage after forming the passage with a pipe, the hot plate could be easily manufactured without requiring a special machine tool.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan sectional view (a) of a hot plate 1 of the present invention and an AA sectional view (b) in (a), and FIG. 2 is a sectional view of (b) in FIG. It is a partial enlarged view. FIG. 4 shows another embodiment of the present invention. An embodiment of the present invention will be described in detail with reference to FIGS.

In FIG. 1, the medium passage is formed by a pipe 3 having a square cross section, which is preferable in that the heat transfer area is larger than a round hole having the same passage area. Two pipes 3 having an inlet 4 and an outlet 5 are helically bent inward at equal intervals in parallel, and their ends are connected by another short pipe at or near the center of the hot plate 1. Have been. The helically bent pipes 3 penetrate them at right angles and are held in place by a support plate 2 having a height less than the thickness of the hot plate 1. Although the example in which the support plate 2 is provided vertically and horizontally has been described, the support plate 2 may be added to a diagonal position or the like as necessary. In addition, another pipe having a circular cross section is welded to the pipe 3 at the inlet 4 and the outlet 5 for connection with a hose or the like.

[0007] The pipe group formed as described above is held and cast into a mold larger than the vertical and horizontal thickness dimensions of the hot plate 1. At this time, the support plate 2 extended more than the vertical and horizontal dimensions of the hot plate 1 holds the pipe group at the time of casting at the center of the thickness, and is cut at the time of processing the end surface of the hot plate after casting.
The material to be cast is preferably cast steel or ductile cast steel. In the embodiment, since FCD-600 is used, the hardness is 1.5 times that of the conventional SS400. After casting, it is annealed to remove distortion and machined.

FIG. 4 shows another embodiment. Hot plate 27
Is a plug 25 provided with a predetermined number of partition members 26 and connecting rods indicated by x in the perforated holes at different depths (only one side has the same depth) from the four sides to the center of the thickness.
1) is manufactured by inserting and welding like a conventional hot plate shown in FIG. 3, and an inlet passage from an inlet 23 and an outlet passage from an outlet 24 are provided side by side similarly to FIG. A spiral passage 22 having the other end communicating therewith is formed.

[0009]

Since the hot plates 1 and 27 according to the present invention are configured as described above, the inflow and outflow media always flow in parallel, and the average temperature of both media is approximately at any position on the hot plate. Since they are the same, the temperature distribution of the hot plate becomes uniform.
Therefore, the quality of the laminated molded product is maintained at a high level, and greatly contributes to improvement in productivity.

[Brief description of the drawings]

FIG. 1A is a plan sectional view of a hot plate 1 of the present invention, and FIG. 1B is a sectional view taken along line AA in FIG.

FIG. 2 is a partially enlarged view of FIG. 1 (b).

FIG. 3 is a plan sectional view of a conventional hot plate 10;

FIG. 4 is a diagram showing a passage of a medium in a hot plate, showing another embodiment of the present invention.

[Explanation of symbols]

 1, 10, 27 ... Hot plate 2 ... Support plate 3 ... Pipe 4, 15, 23 ... Inlet 5, 16, 24 ... Outlet 11 ... Vertical hole 12, 13, 14 ... Side hole 17, 18, 21, 25 Plug 19 Connection rod 20, 26 Partition material 22 Passage

Claims (2)

[Claims] 1. A hot plate for controlling the temperature of a medium used in a press for forming a laminated product, wherein an inlet passage and an outlet passage of the medium are spirally provided, and the inlet passage and the outlet are provided at or near the center of the hot plate. A hot plate of a press device, characterized in that a passage is connected. 2. The heating plate according to claim 1, wherein the passage is formed by a pipe and then cast.
The hot plate of the press device according to 1.