JPH11254465A - Mold releasing mechanism for mold for foam molding. - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a constitution wherein installation expenditure is decreased by miniaturizing a mold and a foamed product can be simply and surely taken out. SOLUTION: A mold releasing mechanism 50 is constituted of a contact member 42 connected with a pushing-up member 41 and facing closely between rails 17 and 17, a hoisting/lowering member 31 arranged below the contact member 42 and elevating the contact member 42 toward the bottom mold 12 when it is elevated, a supporting member 32 arranged on the back face and provided with rollers 33 and 34 on its lower end part, a cam plate 35 forming an inclined face 36 which allows that the rollers 33 and 34 hook while they are sliding in such a way that it has an elevating slope in the advancing direction of a mold 10. As the mold 10 moves on the rail 17 and 17 and reaches working position for mold releasing, the hoisting/lowering member 31 elevated by the cam action of the rollers 33 and 34 and the inclined face 36 pushes up the pushing-up member 41 through the contact member 42 to push out a product U from a cavity 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a demolding mechanism for a foaming mold, and more particularly, to a foaming product formed by a foaming reaction of a foaming material injected into a cavity, which can be easily removed from the cavity. The present invention relates to a demolding mechanism of a foaming mold configured to be able to be removed.

[0002]

2. Description of the Related Art Various foam products made of urethane or the like are prepared by injecting a predetermined amount of foam molding material (hereinafter referred to as "foam material") into a cavity formed inside a foam molding die. It is formed into a predetermined shape by foaming and solidifying inside. As shown in FIG. 12, for example, this foam molding die is basically composed of an upper die 61 and a lower die 62 that are vertically divided from each other, and these upper die 61 and lower die 62 are clamped. By doing so, the cavity 63 having a predetermined shape is formed inside, and the cavity 63 is exposed by opening the upper mold 61 from the lower mold 62. The foaming material injected into the cavity 63 becomes cloudy due to a chemical reaction and becomes creamy, and then fills and solidifies the entire cavity 63 to complete foaming. In the above-described foaming mold 60, the upper mold 61 is opened, a foaming material is injected into the cavity 63 of the lower mold 62, and then the upper mold 61 and the lower mold 62 are clamped to form the cavity 63. An open injection type in which a foaming reaction proceeds in the inside, and an injection port (not shown) of an injection device at an injection port (not shown) formed at a required position of the mold in a state where the upper mold 61 and the lower mold 62 are previously clamped. There is a closed injection type in which a foaming material is injected into the cavity 63 by making contact with the cavity 63 and a foaming reaction proceeds in the cavity 63.

In the foam molding die 60, the lower mold 62 is used in order to easily take out the molded foamed product U after the foaming reaction of the foamed material in the cavity 63 is completed.
Is provided with a release mechanism 64. This release mechanism 64
As shown in FIG. 12, the push-up member 6 is aligned with the concave portion 62a formed on the bottom surface of the cavity 63 of the lower mold 62 and the upper surface portion forms a part of the inner surface of the cavity 63.
5 and fixed to a predetermined position of the lower mold 62, and a rod 66
and a fluid pressure cylinder (a hydraulic cylinder or a pneumatic cylinder or the like) 66 having a leading end connected to the push-up member 65. That is, in the foaming step, the fluid pressure cylinder 66 is controlled so that the rod 66a is retracted, and the push-up member 65 is housed in the recess 62a,
In the demolding process of the foamed product U, the fluid pressure cylinder 6
By controlling the rod 6a to advance (extend) the rod 66a, the push-up member 65 is moved up to push up the foamed product U in the cavity 63 as shown in FIG.
Can be easily taken out. The push-up member 6
At the lower part of 5, there are provided guide bars 67, 67 for holding the posture of the pressing member 65 and guiding the ascending and descending movement.

[0004]

By the way, in the foaming mold 60 for molding a large-sized foamed product U, the mold 60 is used.
Since the device itself is large, a space for disposing the release mechanism 64 can be easily secured. However, in the foam molding die 60 for a small-sized foam product U, since the die 60 itself is small, there is a case where there is no space for disposing the release mechanism 64. For this reason, in the small-sized foam molding die 60, the size of the die 60 itself must be increased in order to provide a space in which the fluid pressure cylinder 66 can be mounted. Was inherent. In order to improve the production efficiency, when a plurality of foaming molds 60 are installed on a turntable or a moving trolley or the like and foam molding is performed while sequentially moving each mold 60, all the foaming molds 60 are required. It is necessary to dispose the fluid pressure cylinder 66 for moving the lifting member 65 up and down in the mold 60, and there is a problem that the equipment cost for the mold equipment is further increased. Moreover, it is difficult to stably control the supply of the working medium (oil, air, etc.) to the fluid pressure cylinder 66 mounted on the moving foaming mold 60, which is an obstacle to the efficiency and rationalization of the demolding operation. Was.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems suitably. A demolding device for removing a foamed product disposed in a mold is provided outside the mold. By controlling the operation using the cam action by the installed cam plate,
An object of the present invention is to provide a demolding mechanism of a foaming mold configured to reduce the equipment cost by downsizing the mold and to easily and surely take out a foamed product.

[0006]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and appropriately achieve the intended object, a foam-molding mold releasing mechanism according to the present invention extends over a required length. A trolley provided movably on a rail, and a mold having an upper mold and a lower mold defining a cavity therein and mounted on the trolley, and this mold is mounted on the rail together with the trolley. While moving, foaming material is foamed in the cavity, and at the timing when the cart reaches the demolding operation position, the upper mold is released from the lower mold, and the push-up member housed in the bottom of the cavity is raised. In the foaming mold that is configured to push up and remove the product after the foaming is completed, one end is connected to the push-up member, and the other end is suspended from the lower mold so as to be between the rails. An abutting member that is close to the An elevating member arranged below the member and capable of ascending and descending, and at the time of elevating, elevating and lowering member which presses and raises a corresponding contact member toward the lower mold; A support member provided with an engaging member at a portion thereof, and an inclined surface fixed between the rail at the demolding operation position and allowing the engaging member to engage while sliding. A cam plate formed so as to be inclined upward in the direction, and as the mold moves on the rail and arrives at the demolding operation position, the cam action between the engagement member and the inclined surface is performed. The lifting member is gradually raised downward, and the lifting member pushes up the push-up member via the contact member, whereby the foamed product is extruded from the cavity to be released from the cavity. It is characterized by.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a foaming mold according to the present invention.

FIG. 1 is a longitudinal sectional front view schematically showing a foaming mold according to a preferred embodiment of the present invention. The foam molding die 10 of the present embodiment has the same basic configuration as the above-described conventional foam molding die 60, and is divided into an upper mold 11 and a lower mold 12 that can be tightly closed with each other. This is a split type, in which the cavity 13 having a predetermined shape formed inside can be exposed by opening the upper mold 11 from the lower mold 12 with the pivot 14 as the center. The mold for foam molding 10 of the embodiment is an open injection type, in which the upper mold 11 is opened, a foam material is injected into the cavity 13 of the lower mold 12, and then the upper mold 11 and the lower mold 12 are combined. To form a foaming reaction in the cavity 13. The upper mold 11 and the lower mold 12 are clamped so that they cannot be opened by a clamp device (not shown).

As shown in FIGS. 1 and 2, the foam molding die 10 of this embodiment is provided with appropriate driving means (shown in FIG. ), And is fixedly mounted on a movable carriage 20 that moves with the movable carriage 20, and moves on the rails 17, 17 together with the movable carriage 20. The movable trolley 20 includes a lower frame 21 formed of a L-shaped cross section in the form of a horizontal rectangular frame, and a plurality of columns 22 erected at the upper corners of the lower frame 21.
And a plate-shaped mold mounting table 23 supported by the lower frame 22. Two rollers 24, 25 rolling on the rails 17, 17 are provided on both side ends of the lower frame 21, respectively. But,
It is arranged rotatably at predetermined intervals in front and back. The foam molding die 10 includes a support table having a lower mold 12 fixed to an upper surface of the mold mounting table 23 with bolts and the like, and an upper mold 11 standing upright on an upper surface end of the mold mounting table 23. 26 is rotatably supported via the pivot shaft 14. The rails 17, 17 extend in a closed loop, for example, as shown in FIG. 6, and a plurality of movable carts 20 on which the foam molding die 10 is mounted are arranged at equal intervals on the rails 17, 17. Each of the moving carts 20 moves around the rails 17, 17 so that the foaming material injection step, the foaming step of the foaming material, and the demolding step of the foamed product are completed. I have.

An elevating body 30 for operating a demolding device 40 disposed on the foam molding die 10 is mounted on the movable carriage 20 so as to be able to move up and down with respect to the lower frame 21. Has been established. This elevating body 30 is shown in FIGS.
As shown in FIG. 3, a rectangularly-shaped elevating plate (elevating member) 31 substantially conforming to the opening 27 of the lower frame body 21 and four pairs of four pairs disposed in a downward manner from the lower surface of the elevating plate 31. Each support plate 3
Rollers (engaging members) 33 and 34 rotatably disposed between the lower ends of the upper and lower ends 32 and 32. The height at which the lift plate 31 is always aligned with the opening 27 by its own weight. The posture is maintained at the level. As shown in FIG. 5, the four rollers 33, 34 are arranged at regular intervals in a direction orthogonal to the moving direction of the movable carriage 20, and the rollers 33, 33 on both sides and the central roller , 34 and the truck 2
It is arranged at a predetermined distance from the direction of movement of zero.

4 and 5 are located between the rails 17 and 17 where the removal of the foamed product U is performed.
As shown in FIG.
A holding plate 19 is provided between the 18 and four cam plates 35 corresponding to the rollers 33 and 34 of the elevating body 30 are arranged on the upper surface of the holding plate 19. Each of the cam plates 35 has the same shape, and has a trapezoidal side surface having a first inclined surface 36 having an upward slope and a horizontal surface 37 and a second inclined surface 38 having a downward slope with respect to the traveling direction of the mold 10. The cam plates 35, 35 at both ends and the cam plates 35, 35 at the center are formed by the rollers 3 with respect to the traveling direction of the movable carriage 20.
They are arranged at the same interval as the intervals of 3,34. The rollers 33 and 34 of the elevating body 30 are respectively moved by the corresponding cam plates 35 while the moving carriage 20 is moving.
At the first inclined surface 36, the horizontal surface 37, and the second inclined surface 38 while slidingly rolling.

That is, the movable carriage 20 is the rail 1
As shown in FIG. 8, when moving on
0 is above the cam plate 35, the rollers 3
3 and 34 simultaneously contact the first inclined surface 36 of each cam plate 35, and then the rollers 3
The elevating body 30 is gradually raised by the rolling of the first and second inclined surfaces 36 by the upper and lower surfaces 34. When the rollers 33 and 34 are located on the horizontal surface 37 of each cam plate 35, the elevating body 30 is held at the ascending position as shown in FIGS. A contact rod (contact member) 42 of each demolding device 40 disposed in
Is pushed up. When the movable carriage 20 is further moved and the rollers 33 and 34 are located on the second inclined surfaces 38 of the cam plates 35, the lifting body 30 moves the movable carriage 20 as shown in FIG. Gradually descends under
When each of the rollers 33 and 34 is separated from the second inclined surface 38, the height returns to the original level.

The demolding mechanism 50 of the present embodiment includes the cam plate 35 fixed to the holding plate 19, the elevating plate 31 provided on the elevating body 30 which is raised and lowered by the cam plate 35, and Two sets of demolding devices 40 which are raised and lowered by the plate 31;
40. As shown in FIGS. 1 and 2, the demolding device 40 is aligned with the concave portion 12 a formed in the lower die 12 of the foam molding die 10, and
1a has a push-up member 41 which constitutes a part of the inner surface of the cavity 13, and a contact rod 42 disposed below the push-up member 41 in a hanging manner. The contact rod 42 is fitted inside a support tube 44 fixed to an L-shaped bracket 43 fixed to the lower surface of the mold mounting base 23,
To slide up and down. At the lower end of the contact rod 42, a contact plate 45 with which the elevating plate 31 contacts is fixed, and a coil spring 46 is provided between the contact plate 45 and the support cylinder 44. The outer ring is attached to the contact rod 42. This coil spring 46
Is mounted in a compressed state between the abutment plate 45 and the support cylinder 44 at all times, and in a normal state where the lifting member 41 is not pushed up from below by the elevating body 30, the lifting member 41 12a so as to be housed in close contact therewith.

When the movable carriage 20 arrives at the removing position and the rollers 33 and 34 are positioned on the horizontal surface 37 of the cam plate 35 and the elevating body 30 is lifted, FIG.
As shown in FIG. 4, as the contact rod 42 of each of the demolding devices 40 moves upward, each of the push-up members 41 protrudes from the concave portion 12 a to form the foamed product U that has completed foaming in the cavity 13. It is designed to push up. A connecting piece 47 connecting the main body of the push-up member 41 and the contact rod 42 is slidably contacted with the insertion hole 15 formed in the lower mold 12, and when the push-up member 41 rises and descends, the member 41 The posture is maintained.

[0015]

Next, the operation of the demolding mechanism of the foaming mold according to the present embodiment having the above-described structure will be described.

The foam molding die 10 of this embodiment is mounted on a movable carriage 20 which is moved by appropriate driving means on rails 17 extending to a required length. , 17 is set so that a step of injecting the foaming material into the cavity 13, a step of foaming the foaming material, and a step of releasing the foamed product U formed by completing the foaming are performed.

That is, as shown in FIG. 10, the injection step is performed after the removal of the foamed product U from the cavity 13 is completed in the demolding step for the foam molding die 10, The predetermined amount of the foamed material is injected into the exposed cavity 13 to complete the process. Note that the movable carriage 20 is separated from directly above the cam plate 35, and the lifting body 30 and the cam plate 35 are not in contact with each other.
At 0,40, the push-up member 41 is tightly accommodated in the recess 12a of the lower mold 12 under the bias of the coil spring 46 toward the extension side, and the upper surface 41a of the member 41 is the inner surface of the cavity 13. Is part of.

When the step of injecting the foam material is completed, FIG.
As shown in (2), when the movable carriage 20 is separated from the cam plate 35 by a predetermined distance, the upper mold 11 is closed to the lower mold 12 and the cavity 13 is closed in an airtight state. Start foaming. The foam material fills the cavity 13 and the foam product U is formed while the mold 10 for foam molding substantially makes a round on the rails 17 under the movement of the movable carriage 10. The upper mold 11 and the lower mold 12
Is clamped by a clamp device (not shown), and the interior of the cavity 13 is maintained at an appropriate pressure by a gas generated by a foaming reaction of the foaming material.

When the foaming of the foamed material is completed, the foamed product U
Is molded, and the foam molding die 10 is
7 and then approach the removal position again,
As shown in (2), the clamp by the clamp device (not shown) is released, the upper mold 11 is released from the lower mold 12, and the foamed product U is exposed upward. And the mold 1 for foam molding
When 0 moves close to the cam plate 35 (moves rightward in FIG. 7), as shown in FIG. 8, the rollers 33 and 34 of the elevating body 30 disposed on the movable carriage 20 3
5 comes into contact with the first inclined surface 36.

When the movable carriage 20 moves right above the cam plate 35 (rightward in the figure), the rollers 33 and 34 of the elevating body 30 slide on the first inclined surface 36 of the corresponding cam plate 35. The elevating body 30 gradually rolls up and comes up gradually. At this time, the elevating plate 31 of the elevating body 30 comes into contact with the contact plate 45 of each of the demolding devices 40, 40, and the contact rod 42 is pushed up via the contact plate 45. Thereby, the push-up member 41 connected to the upper end side of each contact rod 42
While projecting into the cavity 13,
The foamed product U inside is gradually pushed up.

When the movable carriage 20 is positioned directly above the cam plate 35, as shown in FIGS. 3, 4 and 9, the rollers 33 and 34 of the elevating body 30 are moved to the horizontal plane 37 on the corresponding cam plate 35. The push-up member 41 which comes to the upper side and protrudes upward through the contact rod 42 causes the foamed product U
Is extruded from the cavity 13. Thereby, the foamed product U can be easily taken out from the lower mold 12.

As described above, in the demolding mechanism of the foaming mold according to the present embodiment, the operation source for raising and lowering the demolding device 40 disposed in each mold 10 is the mold 10 itself. , The mold 10 itself can be configured to be small and compact. In particular, the present invention can be suitably applied to a small-sized foam molding die 10 in which it is difficult to secure an installation space for an operation source.

In this embodiment, the elevating body 30 is moved up by using the cam action of the cam plate 35 disposed at the position where the demolding operation is performed, and the demolding device 40 is operated by the elevating body 30. Although the configuration is illustrated, for example, a hydraulic pressure, a pneumatic damper, a leaf spring, or the like may be provided below the demolding work position, and the lifting plate 31 may be raised and lowered using these devices. Good.

In the above embodiment, two contact rods 42,
An example is shown in which the demolding device 40 provided with 42 is disposed in the foaming mold 10. However, the number of the contact rods 42 is not limited to this, and the size and the size of the foamed product U are not limited. The number of arrangements is appropriately changed depending on the shape and the like.

[0025]

As described above, according to the demolding mechanism of the foam molding die according to the present invention, the demolding device disposed on the foam molding die is disposed outside the mold. Since the operation is controlled using the cam action of the installed cam plate,
There is no need to separately arrange an operation source for each foaming mold, and there is an advantage that a significant reduction in mold equipment costs can be realized. Moreover, since there is no need to dispose an operation source in each foaming mold, the mold itself can be made compact and compact, and it is particularly suitable for a small foaming mold. It has beneficial effects such as gain.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing a foam molding die according to a preferred embodiment of the present invention in a state where a demolding mechanism is not operated.

FIG. 2 is a vertical cross-sectional side view showing the foam molding die according to the present embodiment in a state where a mold release mechanism is not operated.

FIG. 3 is a vertical sectional front view showing the foaming mold according to the present embodiment in an operation state of a mold release mechanism.

FIG. 4 is a vertical sectional side view showing the foaming mold according to the present embodiment in an operation state of a demolding mechanism.

FIG. 5 is a plan view schematically showing a movable trolley on which a foaming mold is mounted, a lifting / lowering body, and a cam plate provided on a rail.

FIG. 6 is a schematic configuration diagram of a molding line equipped with a foam molding die.

FIG. 7 is an explanatory view of the operation of the foaming mold, showing a state in which the foamed product in the cavity is completely foamed and the upper mold is opened.

FIG. 8 is an explanatory view of the operation of the foam molding die, showing a state in which the moving carriage approaches the demolding operation position and the rollers of the elevating body contact the cam plate.

FIG. 9 is an explanatory view of the operation of the foaming mold, showing a state in which the movable cart has arrived at the demolding operation position, and the foaming product has been pushed up by the demolding device being actuated by the elevating body moved up and down. Show.

FIG. 10 is an explanatory view of the operation of the foam molding die, showing a state in which the movable cart is separated from the demolding operation position, the demolding device returns to the original state, and the foam material is injected.

FIG. 11 is an explanatory view of the operation of the foam molding die, showing a state in which the movable carriage is further separated from the demolding operation position, the injection of the foaming material is completed, and the upper mold is closed.

FIG. 12 is a vertical sectional side view schematically showing a mold release mechanism of a conventional foam molding die.

FIG. 13 is a vertical sectional side view showing a state in which a foamed product is pushed up by an operation of a demolding mechanism in a conventional foaming mold.

[Explanation of symbols]

 Reference Signs List 10 Mold for foam molding 11 Upper mold 12 Lower mold 13 Cavity 17 Rail 20 Moving carriage 31 Elevating plate (elevating member) 32 Support member 33, 34 Roller (engaging member) 35 Cam plate 36 First inclined surface 41 Push-up member 42 Contact rod (contact member) U Foam product

Continuing from the front page (72) Inventor Akihiko Murakami 3-36 Imaikecho, Anjo-shi, Aichi Pref. INOAC CORPORATION Anjo Office

Claims (2)

[Claims] 1. A rail extending over a required length.
A trolley (20) movably mounted on the top and a cavity (1
The bogie having an upper mold (11) and a lower mold (12) defining the 3)
(20) and a mold (10) placed on the rail (17, 17) while moving the mold (10) together with the bogie (20). Foam the material, the trolley
At the timing when (20) arrives at the demolding work position, the upper die (1
1) is released from the lower mold (12) and the cavity
(13) In the foaming mold that lifts the push-up member (41) housed at the bottom of the foaming-molded product (U) and removes the product (U), the push-up member (41) One end is connected, the other end is suspended from the lower mold (12), the contact member (42) closely approaching between the rails (17, 17), the contact member (42 ), And can be moved up and down, and at the time of ascending thereof, an elevating member (31) that presses and raises the corresponding contact member (42) toward the lower mold (12); and ) Is disposed between the support member (32) having an engaging member (33, 34) provided at the lower end thereof, and is fixed between the rail (17, 17) at the removal work position. A cam plate (35) formed with an inclined surface (36) that allows the engagement members (33, 34) to engage while rubbing each other so as to be inclined upward in the direction of travel of the mold (10). ), Wherein the mold (10) is mounted on the rail (17, 17) As it moves on and reaches the demolding operation position, the elevating member (31) gradually rises under the cam action of the engaging members (33, 34) and the inclined surface (36). When the lifting member (31) pushes up the push-up member (41) through the contact member (42), the foamed product (U) is extruded from the cavity (13) and removed. A demolding mechanism for a foam molding die, characterized in that it is configured to be molded. 2. The engaging member (33, 34) is provided on the inclined surface (3).
3. The mold release structure for a foam molding die according to claim 1, wherein said roller is a roller capable of slidably rolling.