JPH07329081A - Foam molding tool - Google Patents

Abstract

PURPOSE:To provide a foam molding tool which is simple in positional adjustment of a mold face of a top force and dimensional adjustment of a foam molded product to be obtained can be performed easily. CONSTITUTION:A top force 11 is taken into a flange part 16 wherein it possesses an opening part 15 in the central part and the lower part of the inner circumferential surface of the opening part is projected inward of the opening and the fringe part is put slidably horizontally on a frame body 13, in which the undersurface of the circumference of the opening part forms a parting face 14 of a top force, and a flange part. Then this foam molding tool is constituted of a substrate 12 comprised of 3 horizontal position adjusting plate 21 wherein the horizontal position adjustment is performed by an advance and retreat of a horizontal bolt 19 pierced through respectively the longitudinal and lateral sides of the frame body and a press body 29 which is fitted to the upper part of the frame body and places horizontally slidably the fringe part of the horizontal position adjusting plate 21 between the flange part and the press plate 29 and a block 32 for a top force mold face held in an adjustable state of a vertical position on the lower side of the horizontal position adjusting plate by a vertical bolt 26 which is pierced through vertically the horizontal position adjusting plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam molding die having a foam molding cavity between an upper mold and a lower mold.

[0002]

2. Description of the Related Art A foaming mold is used for producing a foamed molded product having a desired shape by injecting a foaming raw material such as a urethane foam raw material into a cavity between an upper mold and a lower mold to foam. . At that time, depending on the type of the foam-molded article, the core is placed on the upper mold of the foam mold and the skin is placed on the lower mold, and the core and the skin are integrally foam-molded.

By the way, among the foam molding dies shown in FIG.
As shown in FIG. 3, there is a type in which a skirt portion 86 formed on the outer periphery of the product portion of the skin 85 is sandwiched between the outer peripheral portions of the upper die 71 and the lower die 81 to perform sealing. In the foaming mold shown in the figure, the paring surface 84 of the lower mold is composed of split molds 82, 82, and the split molds 82, 82 are used for positioning the dowel 8 for positioning the skin.
7,87 are erected. In addition, the upper mold 71 includes the base 7
3 and an upper mold surface block 75 fixed to the lower surface of the base body 73 with bolts B. Reference numeral 72 is a parting surface of the upper mold, 77 is a core of a foam-molded product, 83
Is a cavity for foam molding.

Further, since the foaming mold usually has variations during the manufacture of the mold, it is difficult to obtain a certain size of the molded product as it is. Therefore, in the foaming mold, the inner surface of the upper mold base 73 with which the upper surface of the upper mold surface block 75 abuts,
The position of the upper mold surface block 75, that is, the upper mold surface 76 is adjusted by using a shim (not shown) for size adjustment as a spacer.

However, according to this method, the upper mold surface 7
The position and thickness of the shim had to be adjusted many times so that 6 was in a predetermined position, and the work was troublesome. Moreover,
Each time, the upper mold 71 had to be disassembled and readjusted, which was extremely troublesome.

Further, by adjusting the position of the upper mold surface block 75, the outer peripheral surface of the upper mold surface block 75 also moves with respect to the outer peripheral surface of the lower mold 81. In the foaming mold having the seal portion as the seal portion, the sealing state changes. For this reason, the seal portion must be recreated by cutting the outer periphery of the mold surface or resin-filling each time, which is very troublesome. Further, in the foam molding die, a mold release agent must be applied to the outer peripheral portion of the mold surface during foam molding, and in addition, a skirt portion of the epidermis to be cut off later is required, so that the material is wasted. There are many problems.

[0007]

Therefore, the present invention has been made in view of the above-mentioned points, and it is possible to easily adjust the position of the upper mold surface and easily adjust the dimensions of the obtained molded product. Moreover, it is an object of the present invention to provide a foam molding die which can simplify the foam molding work and save the skin material.

[0008]

The present invention has a foam molding cavity between an upper mold and a lower mold, and between a core arranged on the upper mold surface and a skin arranged on the lower mold surface. In a foaming mold for foaming a foaming raw material, the upper mold has a base whose edge on the lower surface constitutes a parting surface of the upper mold, and a lower mold that touches a portion surrounded by the parting surface on the lower surface of the base. And a block for the upper mold surface having a core placement mold surface on the lower surface, which is formed to project toward the inside of the lower mold, while the lower mold has an edge bent to the back side in a substantially U shape. A mold surface on which the skin is arranged so as to abut the surface of the core is provided, and the core is sandwiched between the mold surface of the upper mold surface block and the bent edge of the skin to seal between the core and the skin. The present invention relates to a foam molding die characterized by being performed.

[0009]

In the foaming mold of the present invention, the core is sandwiched between the mold surface of the upper mold surface block and the bent edge portion of the skin which is bent to the back side in a substantially U-shape, and between the core and the skin. Since sealing is performed, the outer peripheral portion of the mold surface does not become a sealing portion. Moreover, since the upper mold surface block is formed on the lower surface of the base toward the inside of the lower mold without touching the lower mold, a shim or the like is interposed between the base and the upper mold surface block so that the upper mold surface block is formed. Even if the position of the mold surface block is adjusted, the upper mold surface block does not collide with the inner surface of the lower mold and the position adjustment can be easily performed. Also, even if the gap between the mold surface outer peripheral part (that is, the side surface part) of the upper mold surface block and the lower mold inner surface changes due to the position adjustment, that part is not the seal part, so the sealability is affected. Therefore, it is not necessary to remake the seal portion as in the conventional case.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. 1 is a cross-sectional view of a foam molding die according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of an upper mold, FIG. 3 is a cross-sectional view showing when the dimensions of a molded product in the foam molding die are adjusted, and FIG. FIG. 5 is a cross-sectional view showing the foam molding using the foam molding die, and FIG. 5 is a cross-sectional view showing the upper mold portion of another embodiment. The present invention is not limited to the following embodiments.

A foam molding die 10 according to an embodiment of the present invention shown in FIGS. 1 to 3 comprises an upper die 11 and a lower die 41. The upper die 11 includes a base 12 and an upper die surface block 32. The base 12 includes a frame body 13, a horizontal position adjusting plate 21, and a pressing body 29.

The frame 13 has a size substantially equal to the outer circumference of the parting surface 42 of the lower mold 41, the lower surface thereof constitutes the upper mold parting surface 14, and an opening vertically extending through the center thereof. The part 15 is formed. The opening 15
Is a flange portion 1 that projects into the opening at the bottom of the inner peripheral surface.
6 is formed, and on the other hand, a pressing body mounting step 17 is formed on the inner peripheral surface of the opening. In addition, the frame body 13
Screw holes 18 are horizontally formed on the side surface of the upper step portion 17 at a total of four positions on the front, rear, left and right sides, and horizontal bolts 19 are screwed into the screw holes 18 from the outer surface of the frame body 13 to move forward and backward. It is inserted as much as possible. The horizontal bolt 19 is used for the frame 1
It is longer than the thickness of the side surface of 3, and its tip is positioned in the frame 13.

The horizontal position adjusting plate 21 has a shape similar to that of the opening 15 of the frame body, and the flange portion 16 is provided.
The edge portion 22 is placed on the edge and has a size that allows horizontal sliding. The thickness of the edge portion 22 of the horizontal position adjusting plate is substantially equal to or slightly smaller than the height of the step portion 17 of the opening. In the center of the horizontal position adjusting plate 21, a bolt insertion hole 23 penetrating vertically is formed with a bolt head housing recess 24,
Guide holes 25, 25 are formed on both sides of the lower surface of the bolt insertion hole 23. The horizontal position adjusting plate 21 formed in this manner is used for the flange portion 1 in the opening 15.
The edge portion 22 is placed on 6 and the tip of the horizontal bolt 19 is brought into contact with the side surface of the horizontal position adjusting plate 21,
A vertical bolt 26 is inserted into the bolt insertion hole 23 from above the horizontal position adjusting plate 21.

The vertical bolt 26 has an outer diameter of the body portion smaller than the diameter of the bolt insertion hole 23, an outer diameter of the head portion 27 larger than the diameter of the bolt insertion hole 23, and a tip (lower end). The one having a length protruding from the lower surface of the horizontal position adjusting plate 21 is used. The head portion 27 of the vertical bolt may have an outer diameter larger than that of the head portion of a commonly used bolt. For example, the outer diameter of the head 27 is increased by welding another member to the outer periphery of the head 27 of the vertical bolt.
Further, a plate-shaped body (not shown) having a hole for inserting a wrench or a driver may be fixed to the upper surface of the head 27 of the vertical bolt by welding or the like. As a result, when the horizontal position adjusting plate 21 is adjusted in horizontal position, the head 27 of the vertical bolt is more reliably prevented from coming off from the screwdriver hole 30 formed in the pressing body 29, which will be described later.

The pressing body 29 is a plate-like body which fits on the upper portion of the opening 15 and can be placed on the stepped portion 17, and a hole 30 for screwing a vertical bolt is formed in the center. . The hole 30 for screwdriver is used for the horizontal position adjusting plate 2
The head 27 of the vertical bolt does not come out of the hole 30 for screwing even when 1 horizontally slides in the opening 15, and a wrench or screwdriver for screwing the vertical bolt 26 can be inserted. , And shape. The pressing body 29 has a periphery fixed to the step portion 17 of the opening of the frame body 13 by a bolt 31, and slidably holds the edge portion 22 of the horizontal position adjusting plate 21 between the pressing body 29 and the flange portion 16.

The upper mold surface block 32 is composed of a block whose lower surface is a mold surface 33 corresponding to the shape of the molded product, and the vertical bolt 2 is provided in a screw hole 34 formed in the upper surface.
The leading end (lower end) of 6 is screwed and held under the horizontal position adjusting plate 21 so as not to touch the inner surface of the lower die 41. Further, on the upper surface of the upper mold surface block 32, two guide pins 35 which are vertically movably fitted in the guide holes 25 of the horizontal position adjusting plate are provided upright. The guide pins 35 prevent the upper mold surface block 32 from rotating when the vertical position of the upper mold surface block 32 is adjusted.

On the other hand, the lower die 41 has a concave foam molding cavity 43 below the parting surface 42 of the lower die. In the lower mold 41 of this embodiment, the part forming the parting surface 42 is composed of split molds 44, 44 so that the molded product can be easily released from the mold.
4, 44 are slidable in the horizontal direction.

The foam molding die 10 thus formed.
The horizontal position and the vertical position of the upper mold surface block 32 are adjusted as follows. As shown in FIG. 3, the horizontal position is adjusted by rotating the horizontal bolt 19 with a wrench 45 or the like and moving it back and forth to bring the upper mold surface block 32 to a desired horizontal position.

For example, when the upper die surface block 32 is horizontally moved to the right, as shown in FIG. 3, the right horizontal bolt 19a is retracted so that its tip is located on the side surface of the horizontal position adjusting plate 21. And the horizontal bolt 19b on the left side is moved forward in that state, and the left side surface of the horizontal position adjusting plate 21 is pushed to the right by the tip thereof, and the horizontal position adjusting plate 21 and the upper mold surface block suspended and held by the horizontal position adjusting plate 21 are held. Move 32 to the desired horizontal position. Then, in this state, the horizontal bolt 19a on the right side is moved forward, and the tip thereof is moved to the horizontal position adjusting plate 21.
The horizontal position of the horizontal position adjusting plate 21 is fixed by bringing it into contact with the right side surface of the. Regarding the adjustment in the front-back direction, the front and rear horizontal bolts are moved forward and backward to the desired front-back position. Also, if the side surface of the horizontal bolt 19 is provided with a scale, the horizontal position can be adjusted more easily.

The vertical position of the upper die surface block 32 can be adjusted by inserting the wrench 4 into the screw hole 30 of the pressing body 29.
Insert 6 or the like and rotate the vertical bolt 26. As a result, the upper mold surface block 32 screwed onto the tip (lower end) of the vertical bolt 26 is moved up and down to move the upper mold surface block 3
Place 2 in the desired up and down position. At that time, the guide pin 35 is guided by the guide hole 2 in accordance with the vertical movement of the upper mold surface block 32.
It moves up and down in 5 to prevent the upper mold surface block 32 from rotating. Further, since the upper die surface block 32 whose vertical position is adjusted is located on the lower surface of the pressing body 29 without the head portion 27 of the vertical bolt coming out of the screw hole 30, the core die block 32 will be described later. Even if pressed from below, it does not move upward.

As described above, the foaming mold 10 of the above-described embodiment is used.
The position of the upper mold surface block can be adjusted without disassembling the upper mold 11, and the workability is extremely good.
In addition, in the foam molding die 10 in which the position of the upper mold surface block is adjusted as described above, as shown in FIG. 4, the outer skin 51 is arranged on the lower mold surface and the core is formed on the upper mold surface. 55
Is used for manufacturing a foam-molded article in which the skin and the core are integrated.

The outer skin 51 used at this time has an edge 52 bent in a substantially U shape on the back side, and the core 55 has a size and shape capable of contacting the outer surface of the bent edge portion 52 of the outer skin. Is used. Thereby, the core 55 is sandwiched between the lower surface of the upper mold surface block 32, that is, between the edge of the upper mold surface and the bent edge portion 52 of the epidermis, and the bent edge portion 52 of the epidermis is formed by the foaming pressure described later. Since the outer skin and the core are sealed by pressure bonding to the core 55, the upper mold surface block 32 is adjusted by adjusting the position of the upper mold surface block 32.
Even if the gap between the outer peripheral portion of the mold surface and the side surface 47 inside the lower mold changes, the seal between the skin 51 and the core 55 does not become defective. In addition, the bent edges 52 of the epidermis that abut each other
It is preferable that a gas vent hole (not shown) is formed through the core 55 so as to allow foaming gas to escape.

Then, the foaming raw material P is injected between the skin 51 and the core 55 to foam. At this time, in the foaming mold 10 of this embodiment, an open pouring method is used in which the foaming raw material is injected in a state where the foaming molding die is opened, and then the foaming raw material is closed. By forming (not shown), it becomes possible to perform the closed injection in which the foaming raw material is injected in the closed mold state.

By the foaming of the foaming raw material P, the space between the skin 51 and the core 55 is filled with the foaming raw material, and the pressure between the skin 51 and the core 55 increases due to the foaming pressure, so that the bent edge portion 52 of the skin becomes the core. Adhere to 55 and seal. After the foaming of the foaming raw material is completed, the foaming mold is opened and the foamed molded product is taken out. The foamed molded product has a desired size in which the foam is integrally formed between the core and the skin.

The vertical position adjustment of the upper mold surface block 32 is not limited to the above structure. For example,
As shown in FIG. 5, the heads of the vertical bolts 63 were embedded and fixed on the upper surface of the upper mold surface block 61 to erect the vertical bolts 63, and the vertical bolts 63 were formed on the horizontal position adjusting plate 65. It is inserted into the bolt insertion hole 66 without being screwed, is screwed with the nut 67 arranged on the upper surface of the horizontal position adjusting plate 65, and is rotated by the nut 67, so that the vertical bolt 63 and the lower end thereof are held. The upper mold surface block 61 may be moved up and down. In that case, if a scale is attached to the side surface of the vertical bolt 63, the adjustment can be performed very easily.

Although not shown, the lower end of the vertical bolt is rotatably attached to the upper surface of the upper mold surface block, while the horizontal position adjusting plate is provided with a threaded bolt insertion hole on the inner surface thereof. The upper mold surface block is suspended and held on a horizontal position adjusting plate by screwing the vertical bolt into the bolt insertion hole, and the upper mold surface block is vertically adjusted by rotating the vertical bolt. May be. Also in this case, if the side surface of the vertical bolt is marked, the vertical adjustment can be performed very easily.

In addition, the upper mold may be composed of one base as shown in FIG. 6 and an upper mold surface block provided on the lower surface of the base with its position adjusted by a shim or the like.
Of course, the upper mold surface block in that case is different from FIG.
It does not touch the lower mold.

[0028]

As shown and described above, according to the foaming mold of the present invention, even if the position of the upper mold face block is adjusted to adjust the size of the molded product, the sealing property of the foaming raw material is improved. Does not change and there is no need to remake the seal part. Therefore, the position adjustment (dimension adjustment) can be performed very easily, and the die cost of the foam molding die can be reduced. Moreover, according to the foaming mold of the present invention, since the skin used has no skirt portion on the outer periphery of the product portion, the waste of the skin material is reduced. Furthermore, since the seal part is the upper mold surface part and not the outer periphery of the mold surface,
Since it is not necessary to apply a release agent to the outer peripheral portion of the mold surface, the manufacturing work can be simplified and the material can be saved.

[Brief description of drawings]

FIG. 1 is a sectional view of a foaming mold according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of an upper die of the foaming mold.

FIG. 3 is a cross-sectional view showing the position adjustment of the upper mold surface block of the foaming mold.

FIG. 4 is a cross-sectional view showing foam molding using the foam molding die.

FIG. 5 is a cross-sectional view showing an upper die portion of another embodiment.

FIG. 6 is a cross-sectional view of a conventional foaming mold.

[Explanation of symbols]

 11 Upper Die 12 Base 13 Frame 12 Base 14 Upper Die Parting Surface 15 Opening 16 Flange 19 Horizontal Bolt 21 Horizontal Position Adjustment Plate 26 Vertical Bolt 29 Presser 32 Upper Die Surface Block 42 Lower Die Parting Surface 43 Cavity for foam molding 52 Bent edge of skin

Claims (3)

[Claims] 1. A foam molding which has a foam molding cavity between an upper mold and a lower mold, and foams a foaming raw material between a core arranged on the upper mold surface and a skin arranged on the lower mold surface. In the mold, the upper mold has a base body whose lower edge constitutes a parting surface of the upper mold, and a portion surrounded by the parting surface of the lower face of the base body does not touch the lower mold and protrudes into the lower mold. The upper mold surface block is provided with a core arranging mold surface on the lower surface. On the other hand, the lower mold portion has an edge bent to the back side in a substantially U shape so as to contact the surface of the core. And a mold surface on which the epidermis is formed, wherein the core is sandwiched between the mold surface of the upper mold surface block and the bent edge of the epidermis to perform sealing between the core and the epidermis. Foam mold. 2. The upper die base according to claim 1, wherein an opening that vertically penetrates is formed in a central portion, and a lower portion of an inner peripheral surface of the opening is a flange portion protruding into the opening. A frame body whose lower surface around the opening constitutes an upper parting surface, and an edge portion which is horizontally slidably mounted on a flange portion of the opening portion and which is inserted through a side surface of the frame body. A horizontal position adjusting plate in which the tip of the bolt and the side surface of the edge contact each other, and the horizontal position is adjusted in the opening by the forward and backward movement of the horizontal bolt, and the flange is attached to the upper portion of the frame body. Between the horizontal position adjusting plate and the pressing member that horizontally slides the edge of the horizontal position adjusting plate, while the upper mold surface block is a vertical bolt that is vertically inserted through the horizontal position adjusting plate. Vertical position under the position adjustment plate Foam molding mold, characterized in that formed by the section can hold. 3. The horizontal position adjusting plate according to claim 2, wherein at least two guide holes are formed on the lower surface of the horizontal position adjusting plate at a predetermined distance, and on the other hand, the upper die block is vertically slid on the upper surface of the upper die surface block. A foam molding die, characterized in that a guide projection that fits as much as possible is formed.