JPH10628A - Mold frame for foam molding - Google Patents

Abstract

(57) [Summary] PROBLEM TO BE SOLVED: To provide a mold frame for foam molding, which has a simple structure, a small number of members, is easy to manufacture and inexpensive, has excellent durability, and has excellent steam and cooling. To provide a mold frame free from problems such as water leakage. SOLUTION: Ends of frame members 2a, 2a, 2b, 2b of a required length formed by extrusion molding of a light alloy such as aluminum are joined together to form a frame shape, and one of the two joined together is formed. On the inner surfaces of the frame members 2a, 2a, a fitting connection portion 3 formed by cutting after extrusion molding or the like is provided, and ends of the other frame members 2b, 2b to be joined are fitted into the fitting connection portion 3. And
A foam molding die frame in which the joint between the two frame members 2a and 2b is connected and fixed by welding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame of a mold for foam molding, and more particularly, to an automatic molding machine used for foam molding of expanded polystyrene or expanded polyethylene or expanded polypropylene. It relates to a mold frame.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 20, for example, a mold mounted on an automatic molding machine for foam molding includes a fixed concave mold (cavity mold) 101A and a movable mold disposed opposite to the concave mold 101A. It is composed of a convex type (core type) 101B on the side. The concave mold 101A and the convex mold 101B have respective frames 102a, 10a.
On the opposing surface in 2b, middle dies 103a and 103b, in which a concave mold 101A and a convex mold 101B are closed to form a molding space, are attached via center plates 106a and 106b, respectively, and back faces of the frames 102a and 102b are respectively provided. Plates 104a, 104b are attached and steam chamber 105a inside,
105b is formed. In each of the steam chambers 105a and 105b, cooling water distribution pipes 107a and 107b are provided.
A plurality of drain ports 108a and 108b are formed on the side surfaces of 2a and 102b. Further, the fixed-side concave mold 101A has a raw material feeder.
109 and the eject pin 110 are attached.

As shown in FIG. 21, the pair of concave molds 101A and convex molds 101B are provided with mounting recesses 111a, 111b formed on the outer surface of each of the frames 102a, 102b.
In the portion of the mounting flange protruding from the outer surface of 102a, 102b,
The stopper 112 fixes the molding machine to the fixed die plate 113A and the movable side 113B, respectively. The die plate 11
3A and 113B are connected to the fixed die plate 113A and the concave die 101A together with the convex die 101B by the tie bar 114 having the tip fixed to the fixed die plate 113A through the movable die plate 113B. Connected movably. Then, the moving die plate 113B is advanced in the direction of the fixed die plate 113A by the press rod 115 attached to the back surface of the moving die plate 113B, thereby clamping the convex 101B and the concave die 101A to form the concave die 101A. Convex type 10
Filling the foaming resin bead material from the raw material feeder 109 into the molding space formed with the material 1B, introducing steam into the steam chambers 105a and 105b to heat and foam the bead material, and further cooling water pipes 107a and 107b. After cooling through the cooling water, the movable die plate 113B is retracted from the fixed die plate 113A to open the convex 101B and the concave 101A, and the eject pin 11 is opened.
0 indicates that the molded product is taken out from the concave mold 101A.

Conventionally, a foam molding die 101A as described above,
Generally, the frames 102a and 102b of the 101B are integrally formed by casting a light alloy such as an aluminum alloy. or,
Japanese Unexamined Patent Publication (Kokai) No. 3-253041 discloses a frame having another structure.
There is what was disclosed in the issue. Japanese Unexamined Patent Publication No. 3-25304
The frame of No. 1 combines a corner fixing member provided with a coupling fitting portion at both ends and a profile material of a required length formed in a cross-sectional shape corresponding to the coupling fitting portion of the corner fixing material,
The ends are fitted and connected to each other to form a frame, and the fitting connection is fastened and fixed by a fastening material such as a bolt.

[0005]

However, in the case of a frame which has been generally used in the past and is integrally formed by casting, the casting process is complicated and the time required for production is long.
It has been pointed out that the production cost is high and that there is a problem of durability due to a decrease in strength due to casting deterioration due to casting defects and the like. On the other hand, a frame in which a profile material of the required length is connected with a corner fixing material simply cuts the profile material to any size according to the mold frame and combines it with the corner fixing material. Can be made in a simpler process than an integrally molded product, and frames with different dimensions can be easily manufactured according to the size of the mold. Excellent. However, in the case of this frame, although the profile material can be easily manufactured simply by extruding a light alloy such as aluminum and cutting it to a required length, the corner fixing material has a relatively complicated structure, and furthermore, its structure is relatively complicated. In addition, since it cannot be manufactured by extrusion molding, it is manufactured by casting or the like as in the past. For this reason, in the case of this frame as well, the above-mentioned problems in the casting are not completely solved, and a plurality of members having completely different structures such as a corner fixing material and a profile material are required, The number of members is large and management becomes complicated. Further, the corner fixing member and the profile member are fitted and connected to each other and fastened and fixed by a fastening material such as a bolt. However, a problem of leakage of steam or cooling water from a connecting portion between the two members has been pointed out.

The present invention has been made in view of the above-mentioned problems of the frame of the conventional foaming mold, and has a simple structure, a small number of members, easy production and low cost.
Another object of the present invention is to provide a foam molding die frame which has excellent durability and has no problems such as leakage of steam or cooling water.

[0007]

In order to achieve the above-mentioned object, a foam molding die frame according to the present invention comprises:
The end portions of the frame material having a required length, which are formed by extrusion molding of a light alloy such as aluminum, are joined to each other and combined in a frame shape. It has a fitting connection part formed by cutting or the like, the other end of the frame material to be joined is fitted to the fitting connection part, and the joint part of the two frame materials is connected and fixed by welding. Furthermore, the other end of the frame material to be fitted to the fitting connection portion on the inner surface of one of the frame materials to be joined together was formed into a shape corresponding to the fitting connection portion by extrusion or the like after cutting. Are preferred. On the outer surface of the frame material of this frame, a recess for attachment to a die plate of a foam molding machine formed by cutting or the like after extrusion molding, and a die of a foam molding machine integrally molded at the time of extrusion molding. It is preferable to have a flange for attachment to the plate. Further, the above-mentioned frame material can be formed into a hollow, and this hollow portion can be used as a pipe for cooling water or the like.

[0008]

FIG. 1 is a perspective view schematically showing a frame 1 of a foam molding die according to the present invention. The frame 1 is formed by cutting a frame material formed by extrusion molding of a light alloy such as aluminum into a required length, and a plurality of frame materials 2, for example, two pairs of frame materials 2a, 2a, 2b, 2b as shown in the figure. The adjacent frame material
The end portions of 2a and 2b are joined together in a frame shape in a state where they are joined, and the joined portions of the frame members 2a and 2b adjacent to each other are connected and fixed by welding. The frame members 2a and 2b are formed by cutting extrusions having the same cross-sectional shape into required lengths. Therefore, the frame 1 is formed by appropriately cutting the extruded frame material having the same cross-sectional shape into the lengths of the frame materials 2a and 2b according to the size of the mold attached to the frame 1. The frame 1 can be easily manufactured according to the size of the mold.

The structure of the connection fixing portion between the frame member 2a and the frame member 2b is, for example, as shown in FIGS.
A fitting connection 3 extending in the vertical direction is formed on the inner surface of the end of the frame 2a by cutting after extrusion of the frame 2a, and the end 4 of the other frame 2b to be joined is connected to the fitting connection. The frame 3 is fitted to the portion 3 and the joint between the two frame members 2a and 2b is connected and fixed by welding. In addition, as shown in the example of the figure, the frame members 2a constituting the frame 1
On the upper side of the inner surface of 2b, a horizontal ridge 5a to which a center plate for attaching a medium size to the frame 1 is fixed,
5b is formed over the entire length in the longitudinal direction of the frame members 2a and 2b. Therefore, at the joint between the two frame members 2a and 2b, the frame is formed so that the end 4 of the other frame member 2b can be securely fitted to the fitting connection portion 3 on the inner surface of the one frame member 2a. Extrusion of material 2b,
After cutting to the required length, the ridge 5b at the end of the frame member 2b is fitted by the length of the width of the ridge 5a of the other frame member 2a plus the depth of the fitting connection portion 3. The end 4 is cut off by cutting.

As described above, the joint between the frame members 2a and 2b is connected and fixed by welding. The welding between the frame members 2a and 2b is performed, for example, as shown in FIG. At the rising portion 6 where the members 2a and 2b intersect in the vertical direction, the molten material is raised and welded at the corners between the two frame members 2a and 2b, thereby completely sealing the space between the two frame members 2a and 2b, thereby achieving steam and cooling. In addition to reliably preventing water from leaking from the joint, at the horizontal plane portion 8 (the x-line part in FIG. 4) where the two frame members 2a and 2b are joined, welding is performed over both the frame members 2a and 2b, After the seam between 2a and 2b is closed, it is preferable to finish the surface of the welded portion by polishing or the like so as to eliminate the step between both frame members 2a and 2b. Further, in this case, the edges of the two frame members 2a and 2b to be welded, for example, the edge (hatched portion A) of the fitting connection portion 3 of the frame member 2a shown in FIG.
The edge (hatched portion B) of the above is tapered in advance to provide a groove so that the joint is filled with the molten material, so that the molten material is securely attached between the two frame members 2a and 2b and the welding area is widened. It is also a preferred embodiment to improve the welding strength.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, more specific embodiments of the frame of the foaming mold according to the present invention will be described. FIGS. 5 to 7 show an embodiment of the fixed-side concave frame 11, and FIGS. 8 to 9 show the fixed-side concave frame 11.
Is a moving-side convex frame 21 corresponding to FIG. FIG.
To 12 are other embodiments of the fixed side concave frame (frame 3
1) and FIGS. 13 and 14 show another embodiment (frame 41) of a movable-side convex frame corresponding to the fixed-side concave type.

The frames 11 to 41 are formed by cutting a frame material formed by extrusion of a light alloy such as aluminum into a predetermined length, and forming adjacent frames 12a-12b, 22a-22b and 32a-.
The ends of 32b and 42a-42b are joined to each other to form a frame. In these frames, the fixed-side concave frames 11 and 31 are generally formed to be higher than the corresponding movable-side convex frames 21 and 41.

First, the fixed-side concave frame 11 shown in FIG. 5 to FIG. 8 has plate-shaped frame members 12a and 12b formed on the upper inner surface thereof with ridges 15a and 15b for attaching a medium-sized frame. Further, the lower part is formed with protrusions 16a and 16b inward, and furthermore, the protrusion 16a
, 16b are formed with flanges 17a, 17b on the inner side surface at the lower end. Then, as shown in FIG. 6, the adjacent frame members 12a and 12b are provided with protrusions located on the inner surface of the end of one frame member 12a.
15a, the protruding portion 16a, and the flange portion 16a have the other frame member 12b
Of the other frame member 12b is cut off by cutting or the like by an amount corresponding to the width of the ridge 15b, the protrusion 16b, and the flange 17b. The parts are fitted and connected and fixed by welding. Further, in the lower part of the outer surface of the pair of opposed frame members 12a, 12a in the frame 11, recesses 18 for attaching to a die plate of a molding machine are provided.
As shown in FIG. 7, a plurality of back plates 10 are formed by cutting after extrusion molding.
The frame 11 to which 4a is attached can be attached to the fixed-side die plate 113A by the stopper 112 at the attachment concave portion 18.

The moving-side convex type frame 21 corresponding to the fixed-side concave type frame 11 is lower in height than the fixed-side frame 11, and is slightly thicker as shown in FIGS. Steps 25a and 25b for attaching a middle size are formed on the upper surface of the inner surfaces of the frame-like frame members 22a and 22b, and flanges 27a and 27b are formed on the inner surface of the lower end. As shown in FIG. 9, the joint between the adjacent frame members 22a and 12b is formed such that the flange 27a at the inner side surface at the end and the lower end of one frame member 22a has the width and the flange portion 27b of the other frame member 22b. Is cut off by cutting or the like by an amount corresponding to the width of the connecting member 23 to form a fitting connection part 23. The end of the other frame member 22b is fitted to the fitting connection part 23 and connected and fixed by welding. . Also, a plurality of recesses 28 for attachment to a die plate of a molding machine are formed in a lower portion of the outer surfaces of a pair of opposed frame members 22a, 22a of the frame 21 by cutting or the like after extrusion molding. The frame
As in the case of 11, the moving side die plate is
It can be attached to 113B.

Further, the fixed-side concave-type frame 31 shown in FIGS. 10 to 11 has plate-shaped frame members 32a and 32b formed on the upper inner surface thereof with projecting ridges 35a and 35b for medium-size mounting.
The lower portion has inwardly protruding portions 36a, 36b formed thereon, and further has flange portions 37a, 37b formed on the inner side surfaces of the lower end portions of the protruding portions 36a, 36b. The flanges 39a and 39b for attachment to the plate are formed integrally during extrusion molding. Then, the adjacent frame members 32a and 32b
As shown in FIG. 11, the protrusions 35a, the protrusions 36a, and the flanges 37a located on the inner surface of the end of one frame material 32a are provided with the protrusions 35b, the protrusions 36b, and the flanges of the other frame material 32b. The fitting connection portion 33 cut out by cutting or the like by the width of the portion 37b is formed, and the end of the other frame member 32b is formed at the lower end of the outer surface to correspond to the fitting connection portion 33. The formed mounting flange 39b is cut away from the end of the frame 32b by cutting or the like by the total width of the protrusion 36a on the inner surface of the frame 32a and the width of the flange 37a (see FIG. 11). This is indicated by a broken line). And
The end of the other frame member 32b is fitted to the fitting connection portion 33 of the one frame member 32a, and is connected and fixed by welding. As shown in FIG. 12, a back plate 104a is attached to the back side of the frame 31, and the frame members 32a, 32a or the frame members 32b, 32
b, the mounting flanges 39a, 39a
Or 39b, 39b, the stopper 112 can be attached to the fixed die plate 113A of the molding machine.

The frame 31 for the fixed-side concave type is provided.
The moving-side convex frame 41 corresponding to is lower in height than the fixed-side frame 31, and as shown in FIGS.
Protrusions 45a, 45b for attaching a medium size are formed on the upper portions of the inner side surfaces of the plate-like frame members 42a, 42b, and projecting portions 46a, 46b are formed inward on the lower portion, and further projecting portions 46a, 46b are formed. Flanges 47a and 47b are formed on the inner surface of the lower end of 46b, and a flange for attachment to the die plate of the molding machine is formed on the outer surface of the lower end.
49a and 49b are formed integrally during extrusion molding. Then, the adjacent frame members 42a and 42b are, as shown in FIG.
The protrusions 45a, the protrusions 46a, and the flanges 47a located on the inner surface of the end of one frame member 42a are provided with the protrusions 45b of the other frame member 42b.
, The fitting connecting portion 44 cut out by cutting or the like by the width of the protruding portion 46b and the flange portion 47b is formed,
At the end of the other frame member 42b, a mounting flange 49b formed at the lower end of the outer surface to correspond to the fitting connection portion 44 is provided.
From the end of 42b, the protrusion 46a on the inner side of the frame material 42a and the flange 47a
It has been cut off by cutting or the like by the width of FIG.
4 are indicated by broken lines. ). Then, the end of the other frame member 42b is fitted to the fitting connection portion 44 of the one frame member 42a, and is connected and fixed by welding. This frame 41 has a back plate attached to the back side, and frame members 42a, 42a, or frame member 42b
, 42b, the mounting flange 49a formed at the lower part of the outer surface.
, 49a, or 49b, 49b, can be attached to the moving die plate 113B of the molding machine by a stopper.

FIGS. 15 to 16 and FIGS. 17 to 18 show still another embodiment of the frame member 2 constituting the frame of the foaming mold according to the present invention. As shown in FIGS. 15 and 17, the frame member 2 has a hollow portion 6 continuous in the longitudinal direction formed therein, and this hollow portion 6 can be used as a pipe for cooling water or the like. This hollow portion 6 is formed at the time of extrusion molding of the frame material 2. After the frame material 2 is cut to a predetermined length, for example, in the case of the hollow portion 6 having a circular cross section shown in FIG. As shown in FIG.
Openings at both ends of the hollow portion 6 are closed by plugs 7 and the like. In the case where the hollow portion 6 has a rectangular cross-section or another shape as shown in FIG. 17, a metal sealing member 8 corresponding to the cross-sectional shape of the hollow portion 6 is fitted into the opening and fixed by welding or the like. . Further, on the upper end surfaces of these frame members 2, as shown in FIG. 19, a packing mounting groove 9 for preventing steam leakage can be formed by cutting or the like after extrusion.

[0018]

According to the first aspect of the present invention, the frame of the foam molding die is formed by extruding a light alloy such as aluminum and the like, and ends of the frame material having a required length are joined to each other to form a frame. An inner surface of one of the frame members joined to each other has a fitting connection portion formed by cutting after extrusion molding, and the other end of the joining frame material fits into the fitting connection portion. The joints of the two frame materials are connected and fixed by welding, making it easier to manufacture than a conventional frame made by casting aluminum, and
By cutting the frame material to be extruded into a desired length, it is possible to easily create frames for dies having various dimensions with frame materials having the same cross-sectional shape. Further, since the frame members are directly connected to each other, the number of members is smaller than that in the case where the frame members are connected to each other by the corner fixing members, and the manufacture and assembly are easy. Furthermore, the joint between the frame members is fixed by welding, so that there is no leakage of steam or cooling water. In addition, all the frame members are made by extrusion molding of a light alloy such as aluminum, and are excellent in durability without a problem of a decrease in strength due to casting deterioration due to casting defects such as castings.

According to a second aspect of the present invention, there is provided a frame for foam molding, wherein the end of the other frame material fitted to the fitting connection portion on the inner surface of the one frame material to be joined to each other is formed by cutting after extrusion molding. By this, it is formed in a shape corresponding to the fitting connection portion, and thereby, the cutting process of the fitting connection portion on one inner surface of the frame material is facilitated, and the frame materials to be joined are more reliably connected. Since the fitting and the connection are performed, leakage of steam and cooling water from the joint can be more reliably prevented.

The frame of the foam molding die according to the third aspect is provided by mounting recesses formed on the outer surface of the frame material, and the frame of the foam molding die according to the fourth aspect is formed of a frame material. The attachment flange formed on the outer surface allows easy attachment to the die plate of the automatic molding machine.

In the foam molding frame according to the fifth aspect, the frame material is formed in a hollow shape, so that the frame material and the frame constituted by the frame material can be reduced in weight and the molding material such as aluminum can be rationalized. To reduce costs.

Further, in the foam molding frame according to the sixth aspect, the hollow portion of the frame material is used as a pipe for cooling water or the like, so that the time and labor for the pipe work can be saved and at the same time, the inside of the frame can be reduced. The number of pipes in the formed steam chamber can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a frame of a foam molding die according to the present invention.

FIG. 2 is an exploded perspective view showing a joint of frame members in the frame.

FIG. 3 is an exploded plan view of the frame.

FIG. 4 is a plan view showing a joint of frame members in the frame.

FIG. 5 is a perspective view showing an embodiment of a frame of a foam molding die according to the present invention.

FIG. 6 is an exploded perspective view showing a joint of frame members in the frame.

FIG. 7 is an essential part cross-sectional view showing a structure of a mounting portion of the frame to a die plate.

FIG. 8 is a perspective view showing an embodiment of a frame of a foaming mold according to the present invention.

FIG. 9 is an exploded perspective view showing a joint portion of a frame member in the frame.

FIG. 10 is a perspective view showing an embodiment of a frame of a foaming mold according to the present invention.

FIG. 11 is an exploded perspective view showing a joint portion of a frame member in the frame.

FIG. 12 is an essential part cross-sectional view showing a structure of a mounting portion of the frame to a die plate.

FIG. 13 is a perspective view showing an embodiment of the frame of the foaming mold according to the present invention.

FIG. 14 is an exploded perspective view showing a joint portion of a frame member in the frame.

FIG. 15 is a perspective view showing an embodiment of a frame member constituting a frame of the foam molding die according to the present invention.

FIG. 16 is a plan sectional view of the frame member.

FIG. 17 is a perspective view showing an embodiment of a frame member constituting a frame of the foam molding die according to the present invention.

FIG. 18 is a plan sectional view of the frame material.

19 is an essential part cross-sectional view showing a packing mounting groove on the upper end surface of the frame material.

FIG. 20 is an exploded perspective view of a pair of molding dies.

FIG. 21 is an explanatory sectional view showing a state in which the molding die is mounted on a die plate of a foam molding machine.

[Explanation of symbols]

1: frame, 2: frame material, 3: fitting connection portion, 4: end portion, 5: ridge, 6: hollow portion, 7: plug, 8: sealing member, 9: groove for mounting packing, 11, 21, 31, 41: Frame, 12, 22, 32, 42: Frame material, 13, 23, 33, 43: Fitting connection part, 15, 35, 45: Ridge, 25: Step, 16, 36, 46: projecting portion, 17, 27, 37, 47: flange, 18: mounting recess, 19: mounting flange.

Claims (6)

[Claims] 1. An end portion of a frame material having a required length, which is formed by extrusion molding of a light alloy such as aluminum, is joined to each other and combined in a frame shape. , Having a fitting connection formed by cutting after extrusion molding, the other end of the frame material to be joined is fitted to the fitting connection, and the joint of the two frame materials is connected and fixed by welding. Frame for foam molding. 2. The end of the other frame material fitted to the fitting connection portion on the inner surface of one frame material joined to each other after extrusion molding.
The foam molding die frame according to claim 1, wherein the frame is formed into a shape corresponding to the fitting connection portion by cutting or the like. 3. The foam molding device according to claim 1, wherein the outer surface of the frame material has a recess for attaching to a die plate of a foam molding machine formed by cutting after extrusion molding. Mold frame. 4. The foam molding die according to claim 1, further comprising a flange formed on the outer surface of the frame member, the flange being integrally formed at the time of extrusion molding, for attaching to a die plate of a foam molding machine. flame. 5. The foam molding die frame according to claim 1, wherein the frame material is hollow. 6. The foam molding die frame according to claim 5, wherein a hollow portion of the frame material is used as a pipe for cooling water or the like.