JPH0985726A - Method to remove cement construction material from die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automate the die-removing process for cement construction material, and prevent cracks and chips from generating by a method wherein while expanding and deforming a cavity side wall by extending an interval between extending hooks on both sides, the bottom surface of a molding die is pressed from the lower end of a pressing device, and the bottom surface of the molding die is bent so that the bottom surface may protrude upward. SOLUTION: Under a molding die 11, a pressing device 48 which presses and bends the bottom surface of the molding die 11 from the lower end, is arranged. The pressing device 48 is constituted of a plurality of air cylinders 49 being arranged so as to face upward, and pressing elements 50 being respectively attached to the air cylinders. Also, on the top of the molding die 11, a suction device 51 which draws a cement construction material 24 and takes the material 24 out to the upper side from the molding die 11, is arranged. The suction device 51 is constituted in such a manner that a flat vacuum suction pad 53 being connected to an air suction device with a hose 52, is arranged directly above the molding die 11, and the vacuum suction pad 53 is connected to the vertically moving rod 55 of a vertically moving mechanism by a universal joint 54.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for demolding a cement building material which automatically demolds a cement building material cured in an elastically deformable mold.

[0002]

2. Description of the Related Art Conventionally, cement building materials such as decorative wall materials made of concrete or mortar are injected with a kneading cement molding material having a predetermined composition in a molding die to be cured and cured, and then demolded for natural curing. A general method is to obtain a product through the process. In such a molding method, the more complicated the concavo-convex pattern on the surface of the cement building material, the more difficult it is for the cement building material to come off from the molding die during demolding. For this reason, cement building materials with complicated uneven patterns are molded by using a mold made of soft synthetic resin such as urethane rubber, and at the time of mold release, the mold is elastically deformed and released. .

[0003]

In the above-mentioned method for manufacturing cement building material, the casting process of injecting the kneading cement molding material into the molding die is automated, but the hardened cement building material is taken out from the molding die. The demolding process is performed manually by an operator, and there are drawbacks that the demolding efficiency is low and mass production is difficult.

In order to solve this drawback, the present inventor has proposed a new demolding method in Japanese Patent Application No. 7-216885 filed earlier. The feature of this demolding method is that the molding die is turned upside down, and while the cavity side wall of the molding die is expanded and deformed, the back surface of the molding die is pressed by a pressing device from above to be curved, The cement building material in the molding die is dropped onto a conveyor.

However, in this demolding method, the cement building material in the molding die is likely to be cracked or chipped due to the impact when the cement building material falls on the conveyor, and the product quality may be deteriorated.

The present invention has been made in view of the above circumstances, and therefore an object thereof is to automate the demolding process for taking out cement building materials while deforming the molding die, thereby improving the production efficiency. The object of the present invention is to provide a demolding method for a cement building material, which can prevent cracks and chips from occurring in the cement building material during demolding and can improve product quality.

[0007]

In order to achieve the above object, the method for demolding a cement building material according to claim 1 of the present invention is a recess for fitting into cavity side walls of two opposing sides of an elastically deformable mold. After hardening the cement building material in the mold, insert the extension hooks from above into the fitting recesses of the cavity side walls of the two opposite sides, and widen the space between the extension hooks on both sides. While expanding and deforming the side wall of the cavity, the bottom surface of the molding die is pressed from below by a pressing device to bend the bottom surface of the molding die so as to be convex upward, and thus the cement building material in the molding die. Is peeled from the inner surface of the cavity. In this state, the vacuum suction pad is lowered from above, and the cement building material is sucked by the vacuum suction pad and pulled up to be taken out from the molding die. After that, the cement building material adsorbed by the vacuum suction pad is transferred to the transport device, and if the suction by the vacuum suction pad is released after placing the cement building material on the transport device, the cement building material falls. It does not hurt.

By the way, when the bottom surface of the molding die is pressed from below by a pressing device to bend the bottom surface of the molding die so as to be convex upward, the cement building material is unbalanced and tilted at the top of the bottom surface. And the direction of the inclination changes randomly depending on the situation at that time.

Therefore, according to the second aspect of the present invention, the vacuum suction pad is connected to the elevating mechanism through the flexible joint so that the inclination of the vacuum suction pad can be freely changed according to the inclination of the cement building material. This ensures that the vacuum suction pad is firmly attached to the upper surface of the cement building material, and the cement building material is securely sucked.

Further, according to a third aspect of the present invention, the drive mechanism for driving the expansion hook includes a first cylinder for expanding and contracting a rod to which the expansion hook is attached, and a second cylinder arranged below the mold. And a link mechanism driven by the expansion and contraction operation of the rod of the second cylinder, and the first cylinder is pivotally displaced in the vertical direction by this link mechanism.

With this structure, since the main part of the drive mechanism for driving the expansion hook can be arranged below the molding die, it becomes possible to arrange another device above the molding die, and the molding die can be conveyed. You can effectively use the space of the line.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. First, based on FIG.
The structure of will be described. The molding die 11 is formed of, for example, a silicone-based or urethane-based soft synthetic resin / synthetic rubber. In this mold 11, two cavities 13 partitioned by an intermediate wall 12 are formed. Each of the cavities 13 has a rectangular shape with long right and left sides and short front and rear sides, and a concave-convex pattern is formed on the bottom surface.

Further, among the four cavity side walls 14a and 14b of the molding die 11, correction grooves 15 are formed on the left and right cavity side walls 14a on the long side where bending deformation due to linear contraction over time poses a problem. Has been done. Each correction groove 1
5 extends in parallel along the inner wall surface of the cavity side wall 14a, and the total length y of each correction groove 15 is set to be the same as the inner wall surface dimension x of the cavity 13. Further, the groove width of each correction groove 15 is set to a dimension larger than the amount of time-dependent inward bending deformation of the outer side wall portion 16 thereof.

Further, on the cavity side walls 14b in front of and behind the molding die 11, there are formed fitting recesses 17 for demolding, which also serve as correction grooves for preventing bending deformation. This fitting recess 17 is also
Is formed over almost the entire length of the cavity side wall 14b,
Around the fitting recess 17, a reinforcing material 18 formed of a hard resin plate, a metal plate, a wood plate, or the like is insert-molded. Further, on the lower surface of the bottom surface of the molding die 11, a large number of recessed grooves 19 for facilitating elastic deformation of the molding die 11 at the time of demolding are provided in a row, and the lower surface of the bottom surface portion is formed in a wave shape.

On the other hand, as shown in FIG. 4, the upper surface of the molding die 11 is covered with a lid 20. The material of the lid 20 is not particularly limited, and may be any material such as synthetic resin, wood, metal, and FRP. This lid 20
Has a flat upper surface and a lower surface provided with a fitting protrusion 21 that fits into the correction groove 15. Further, on the lower surface of the lid 20, two bulging portions 22 bulging into the respective cavities 13 are formed, and the bulging portions 22 mold the back surface of the cement building material 24, which is a cement molded product, into a concave shape. While being used as a mold, the upper end of the intermediate wall 12 is fitted and fixed in the recess 23 between the two bulging portions 22.

The vibrating device 25 shown in FIG. 5 (a) is a device for peeling the lid 20 from the hardened cement building material 24. The vibrating body 26 and the vibrating body 26 are vibrated. It is composed of a vibration source 27.

On the other hand, the suction device 28 shown in FIGS. 5 (b) and 5 (c) is a device for sucking the lid 20 and removing it from the mold 11, and is connected to an air suction device (not shown) via a hose 29. The flat vacuum suction pad 30 and a lifting device (not shown) for moving the vacuum suction pad 30 up and down via the support arm 31.

Next, the molding die 11 will be described with reference to FIGS.
The configuration of the demolding device 34 for demolding the cement building material 24 will be described. First cylinders 35 are attached to rotating arms 36 above the left and right sides of a conveying roller 33 that conveys the molding die 11, and the rotating arms 36 have shafts 37.
It is supported rotatably in the vertical direction with the fulcrum as a fulcrum. A plate-shaped expansion hook 39 is attached to the tip of the rod 38 of each first cylinder 35. The expansion hook 39 is formed wide corresponding to the elongated fitting recess 17 to be inserted.

As a drive source for vertically rotating the extension hook 39 about the shaft 37, two second cylinders 41 are arranged in opposite directions on a frame 40 (see FIG. 2) located below the conveying roller 33. It is installed. Each second cylinder 41 is supported rotatably in the vertical direction via a shaft 42, and a rod 43 of each second cylinder 41 is attached to one end of a V-shaped lever 44 arranged on both left and right sides of the transport roller 33. It is connected. This V-shaped lever 44 has a shaft 44a.
Is rotatably supported by the V-shaped lever 44, and the other end of the V-shaped lever 44 and the rotating arm 36 are connected by a link rod 46, thereby connecting the second cylinder 41 and the first cylinder 35. The link mechanism 47 is configured.

At normal times (other than when the mold is removed), the rod 43 of the second cylinder 41 projects and the V-shaped lever 44 pivots upward, as shown by the chain double-dashed line in FIG. 46 raises the rotating arm 36 and the first cylinder 35 upward, and the expansion hook 39 is moved to the mold 1.
1 is retained in a state of being retracted above.

On the other hand, at the time of demolding, as shown by the solid line in FIG. 2, the rod 43 of the second cylinder 41 retracts and the V-shaped lever 44 pivots downward, whereby the link rod 46 descends. Rotating arm 36 and first cylinder 3
5 is rotated downward, and the extension hook 39 is fitted into the fitting recess 17 of the cavity side wall 14b of the molding die 11.

On the other hand, below the molding die 11, the molding die 11
A pressing device 48 that presses and bends the bottom surface of the device is arranged. The pressing device 48 is composed of a plurality of air cylinders 49 arranged upward and a pressing body 50 attached to the rod of each air cylinder 49. The stroke of the rod of each air cylinder 49 (the amount of vertical movement of the pressing body 50) and its operation timing can be arbitrarily adjusted by a control panel (not shown).

Further, as shown in FIG. 1 (b), the molding die 1
1, the cement building material 24 is adsorbed on the upper side of the molding die 1
An adsorption device 51 for taking out from 1 is arranged. The suction device 51 is an air suction device (not shown).
A flat vacuum suction pad 53 connected to the above through a hose 52 is arranged right above the molding die 11, and this vacuum suction pad 53 is a universal joint 54 which is a flexible joint.
It is configured to be connected to a lifting shaft 55 of a lifting mechanism (not shown) via the.

Next, the procedure for removing the cement building material 24 hardened in the molding die 11 will be described. As shown in FIG. 4, the cement building material 24 hardened in the molding die 11 is used as the lid 20.
It is conveyed by the conveying roller 33 to the vibrating position while being covered with. At this exciting position, as shown in FIG. 5A, the vibrating body 26 of the vibrating device 25 descends and is directed to the lid 20, and the vibration generated by the vibration source 27 passes through the vibrating body 26. Is transmitted to the lid 20. Due to this vibration, the bonded state between the lower surface of the lid 20 and the hardened cement building material 24 is peeled off. At this time, the cemented building material 24 and the inner surface of the cavity 13 of the molding die 11 are also easily joined by vibration.

Thereafter, the mold 11 is conveyed to the lid removing position shown in FIG. 5 (b). At this lid removal position, the vacuum suction pad 30 of the suction device 28 descends and is directed to the lid 20, and the lower surface of the vacuum suction pad 30 attracts the lid 20 by air suction force. In this suction state, as shown in FIG. 5C, the vacuum suction pad 30 rises and the lid 20 is removed from the upper surface of the molding die 11. The removed lid 20 is brushed, coated with a release agent, and then returned to the start line.

On the other hand, the molding die 11 with the lid 20 removed
Is conveyed to the demolding position shown in FIGS. 1 and 2 and demolded by the following procedure. First, the extension hook 39 is lowered from the position shown by the chain double-dashed line in FIG. 2 to the position shown by the solid line.
As shown in (a), the extension hook 39 is fitted into the fitting recess 17 of the cavity side wall 14b of the molding die 11.
At this time, when the rod 43 of the second cylinder 41 is retracted and the V-shaped lever 44 is rotated downward, the link rod 46 descends and the rotation arm 36 and the first cylinder 35 rotate downward. Then, the extension hook 39 causes the cavity side wall 14b.
It is in a state of being fitted in the fitting concave portion 17 of. In this state, as shown by the solid line in FIG. 2, the first cylinders 3 on both sides are
5 is operated to widen the space between the expansion hooks 39 on both sides to expand and deform the cavity side wall 14b.
As shown in (b), the bottom surface of the molding die 11 is pressed from below by the pressing body 50 of the pressing device 48 so that the bottom surface of the molding die 11 is curved so as to be convex upward, so that the molding die 11 is bent. The cement building material 24 inside is peeled from the inner surface of the cavity 13.

Thereafter, the vacuum suction pad 53 is lowered from above to direct the vacuum suction pad 53 to the upper surface of the cement building material 24, and the vacuum suction pad 53 sucks the cement building material 24 and pulls it upward to form it. Remove from mold 11. At this time, no matter which direction the cement building material 24 is tilted, the tilt of the vacuum suction pad 53 is freely changed by the universal joint 54 according to the tilt, whereby the vacuum suction pad 53 is placed on the upper surface of the cement building material 24. The cement building material 24 is surely adsorbed, and the cement building material 24 is surely adsorbed.

The cement building material 24 thus sucked by the vacuum suction pad 53 is conveyed to a conveying device (not shown), and the cement building material 24 is placed on the conveying device and then sucked by the vacuum suction pad 53. By releasing the above, the cement building material 24 does not drop from the molding die 11 and is not damaged, and it is possible to prevent the cement building material 24 from being cracked or chipped at the time of demolding. On the other hand, the mold 11 after demolding
Are returned to the start line after the release agent is applied.

In the embodiment described above, the extension hook 3 is used.
Drive source for moving 9 up and down (second cylinder 41)
Is arranged below the conveying roller 33, and the extension hook 39 is moved up and down by the link mechanism 47.
It is possible to arrange another device above 1, and there is an advantage that the space of the demolding line can be effectively used.

However, according to the present invention, the drive source for moving the expansion hook 39 up and down is arranged on the side or the upper side of the molding die 11 if the space on the side or the upper side of the molding die 11 has a margin. Even in this case, the intended purpose of the present invention can be sufficiently achieved.

Further, in the above-mentioned embodiment, the uneven pattern is formed only on the bottom surface of the molding die 11, but the expansion hook 3
An uneven pattern may also be formed on the inner surface of the cavity side wall 14b which is expanded and deformed at 9. Even in this case, by automatically expanding and deforming the cavity side wall 14b with the expansion hook 39, it is possible to automatically remove the mold.

Further, in the above embodiment, since the reinforcing material 18 is arranged around the fitting recess 17 of the cavity side wall 14b, the expansion hook 39 is inserted into the fitting recess 17 of the cavity side wall 14b and the cavity side wall 14b is inserted. Even if the work of expanding and deforming the cavity is repeated many times, the cavity sidewall 14
The damage around the fitting recess 17 of b can be prevented by the reinforcing material 18, the molding die 11 can be used for a long time, and the die cost can be reduced. However, the present invention may be configured such that the fitting recess 17 of the cavity side wall 14b is not provided with a reinforcing material, and even in this case, the intended purpose of the present invention can be sufficiently achieved.

In the above embodiment, the fitting recess 17 of the cavity side wall 14b is formed over substantially the entire length of the cavity side wall 14b, and the expansion hook 3 is correspondingly formed.
Since 9 is also formed wide, the entire cavity side wall 14b can be expanded and deformed by the expansion hook 39, and the entire surface of the cavity side wall 14b can be cement-constructed material 2
It can be reliably peeled off from No. 4, and the mold can be easily removed.

However, the present invention is not limited to the structure in which the fitting recess 17 is formed over substantially the entire length of the cavity side wall 14b, and for example, the fitting recess is intermittently formed at a plurality of locations on the cavity side wall 14b. The cavity side wall 14b may be expanded and deformed by inserting an expansion hook into the fitting concave portion.

Further, in the above embodiment, before the demolding step,
The vibrating device 2 is provided with a lid 20 that covers the upper surface of the molding die 11.
The lid 20 can be peeled off from the hardened cement building material 24 by vibrating at 5, and then the lid 20 is adsorbed by the adsorbing device 28 and removed from the molding die 11 to remove the lid 20. Can also be automated.

By the way, the mold 11 made of soft synthetic resin / synthetic rubber has a property of linearly contracting with time. However, in the above-described embodiment, as shown in FIG. Since the correction groove 15 is formed on each of the cavity side walls 14a and the entire length of the correction groove 15 is set to be equal to the inner wall surface dimension of the cavity 13, even if linear shrinkage occurs in the cavity side wall 14a over time, the correction groove 15 is formed. In the side wall portion 45 on the inner side of the region where is formed, the contraction amounts of both the inner wall surface and the outer wall surface are equal, and the contraction stress generated on the inner wall surface side and the contraction stress generated on the outer wall surface side are balanced, Curvature deformation of the wall surface with time is suppressed.

However, when the dimensional accuracy of the cement building material 24 is not so required, the correction groove 15 is not always required.
Need not be formed, and the intended purpose of the present invention can be sufficiently achieved even if the correction groove 15 is not formed.

The bendable joint that connects the vacuum suction pad 53 to the lifting shaft 55 is a universal joint 54.
However, the joint is not limited to this, and any joint may be used as long as it is freely bent according to the inclination of the cement building material 24 (the inclination of the vacuum suction pad 53).

[0039]

As is apparent from the above description, according to the demolding method of the first aspect of the present invention, the extension hooks are inserted from above into the fitting recesses of the cavity side walls of the two opposite sides of the molding die. Then, while expanding the space between the expansion hooks on both sides to expand and deform the cavity side wall, the bottom surface of the molding die is pushed up from below by a pressing device to be curved,
The cement building material in the molding die is peeled from the inner surface of the cavity, and the cement building material is adsorbed by the vacuum suction pad and pulled up to be taken out from the molding die. The production efficiency can be dramatically improved, and the product quality can be improved without the cement building material falling from the molding die and being damaged when the die is removed.

Further, according to the second aspect, since the vacuum suction pad is connected to the elevating mechanism through the flexible joint, no matter which direction the cement building material inclines when demolding, the vacuum suction pad of the vacuum suction pad is adjusted according to the inclination. The inclination can be freely changed, and the suction capacity of the vacuum suction pad can be improved.

Further, according to the third aspect, since the main part of the drive mechanism for driving the expansion hook can be arranged below the molding die, the space above the molding die can be effectively used.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, in which (a) is a vertical cross-sectional view showing a state in which expansion hooks are inserted from above into fitting recesses of cavity side walls of two opposing mold sides, b) is a vertical cross-sectional view of the state when demolding

FIG. 2 is a front view of the demolding device.

3A is a plan view of a molding die, FIG. 3B is B of FIG.
-B sectional view, (c) is CC sectional view of (a)

FIG. 4 is a vertical cross-sectional view when a lid is placed on the upper surface of the molding die.

FIG. 5 is a diagram illustrating a process of removing a lid that covers the upper surface of the molding die.

[Explanation of symbols]

11 ... Mold, 13 ... Cavity, 14a, 14b ... Cavity side wall, 15 ... Correction groove, 17 ... Fitting recess, 18 ...
Reinforcing material, 20 ... Lid, 21 ... Fitting convex portion, 24 ... Cement building material, 25 ... Vibrating device, 26 ... Vibrating body, 28 ... Adsorption device, 30 ... Vacuum adsorption pad, 33 ... Conveying roller, 34 ...
Demolding device, 35 ... First cylinder, 36 ... Rotating arm,
38 ... Rod, 39 ... Expansion hook, 41 ... Second cylinder, 43 ... Rod, 44 ... V-shaped lever, 46 ... Link rod, 47 ... Link mechanism, 48 ... Pressing device, 49 ... Air cylinder, 50 ... Pressing body , 51 ... suction device, 53 ... vacuum suction pad, 54 ... universal joint (flexible joint), 55 ... lifting shaft.

Claims (3)

[Claims] 1. A method of demolding a cement building material, wherein a cement building material cured in an elastically deformable molding die is automatically demolded, the method comprising fitting cavity side walls on two opposite sides of the molding die. After forming the mating recess and curing the cement building material in the mold, insert the extension hooks into the fitting recesses of the cavity side walls of the two opposite sides from above, respectively, and set the gap between the extension hooks on both sides. While expanding and deforming the side wall of the cavity, the bottom surface of the molding die is pressed from below by a pressing device so that the bottom surface of the molding die is curved so as to be convex upward. A method for demolding a cement building material, characterized in that the building material is peeled from the inner surface of the cavity, and the cement building material is adsorbed by a vacuum suction pad lowered from above and lifted upward to demold. 2. The demolding method for a cement building material according to claim 1, wherein the vacuum suction pad is connected to a lifting mechanism via a flexible joint. 3. A drive mechanism for driving the expansion hook, a first cylinder for expanding and contracting a rod to which the expansion hook is attached, a second cylinder arranged below the molding die, and a second cylinder. 3. A cement building material demounting system according to claim 1 or 2, further comprising a link mechanism that is driven by the expansion and contraction of the rod of the cylinder to vertically rotate and displace the first cylinder. Mold method.