JPH0230503A - Mold - Google Patents

Abstract

PURPOSE:To make mold release at the time of taking out of a molded product easy by providing an angle changing device changing an angle to be formed by a moving side plate and bottom mold. CONSTITUTION:An outer mold 50 is constituted of side plates 51a, 51b whose lower ends are connected with a bottom mold and moving side plates 51c, 51d movable along rail members 11a, 11b. The moving side plates 51c, 51d are constituted of a board material 52, the lower part of which is provided with lower frames 55 provided with two pieces each of wheels 53 on the right and left and end parts of the lower frames 55 are provided respectively with stays 57 in a standing state. The upper part of the stay 57 is provided with a rocking shaft 59 arranged so that the same is put across between the stays and a rocking lever 61 is provided on an end part of the rocking shaft 59. An end of a link 65 is supported axially on an eccentric shaft 63 and the other end of the link 65 is supported axially at a fixed position of the board material 52. The stay 57 and rocking shaft 59 are corresponding to an angle changing device 5 hereupon and a change of an angle of the movable side plates 51c, 51d to be formed with the bottom mold 10 between an outwardly tilting position and upright position is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the invention [Industrial field of application J] The present invention relates to a mold for manufacturing molded products using synthetic resin, clay, etc. The present invention relates to a formwork that facilitates positioning during assembly of the formwork.

``Prior art'' Conventionally, the lower parts of multiple side plates are supported on the bottom mold with hinges,
A formwork is known in which the side plates can be tilted outward. However, in such conventional formworks, when tilting each side plate to take out a molded product, it is necessary to evacuate workers and equipment from the tilting range, resulting in poor workability, especially when handling long molded products. In the case of manufacturing, the retracting range becomes large, requiring a large working space, and it is not preferable from the viewpoint of work safety to tilt the side plate, which has a large weight.

Therefore, as described in JP-A-61-182903, for example, a movable side plate is provided as a side plate, and when taking out the molded product, by moving the movable side plate outward, the molded product can be
Formwork for forming molds is known.

[Problem to be Solved by the Invention 1] However, the formwork described in the above publication had the following problems.

That is, since the molded product is manufactured in close contact with the entire inner surface of the movable side plate, there is a problem in that an excessive force is applied to the movable portion of the movable side plate during the above-mentioned demolding. In addition, when releasing the mold, the above-mentioned adhesion force is released all at once or irregularly and partially, and as a result, an impactful or unbalanced force is applied, resulting in movement during movement. There was a problem in that the side plates vibrated greatly and could not be moved smoothly, and it was necessary to apply a mold release agent inside the mold to help release the molded product. Furthermore, it was considered that the impact force could damage the molded product. As a result, there was a problem of poor workability and productivity.

Structure of the Invention The present invention has been made as a result of intensive efforts to solve these problems, and employs the following structure.

[Means for Solving the Problems] That is, the gist of the present invention is to provide at least one movable side plate, and to assemble a plurality of side plates including the movable side plate on a bottom mold to create a space for manufacturing a molded product. In the formwork in which the molded product can be easily taken out by moving the movable side plate outward, the movable side plate is provided with an angle changing means for changing the angle formed between the movable side plate and the bottom mold. The formwork is characterized by being equipped with.

[Function] According to the formwork of the present invention having the above configuration, when taking out the manufactured molded product, the angle between the movable side plate and the bottom mold is changed by the angle changing means, and the movable side plate is moved slightly outward. position it so that it is tilted towards the side. As a result, the movable side plate gradually separates from the surface of the molded product from the top to the bottom, and the adhesive force between the molded product and the movable side plate is released in a stable state. Therefore, the detachment operation can be carried out smoothly without vibration of the movable side plate or damage to the molded product. Subsequently, the moving side plates are moved outward. As described above, since the adhesion between the movable side plate and the molded product has already been released, the movable side plate is moved extremely smoothly without being subjected to any other action.

As a result of the above, the mold of the present invention does not require any special measures to facilitate mold release, such as applying a mold release agent.

Furthermore, the formwork of the present invention exhibits effective effects during assembly. That is, the movable side plate whose angle has been changed so that it is tilted outward as shown in (above) is moved to a predetermined assembly position. At this point, the movable side plate is still inclined outward and does not come into contact with the adjacent side plate, so that only the lower part can be easily aligned. Thereafter, the angle changing means changes the angle of the movable side plate with respect to the bottom mold to achieve a predetermined assembly angle, and the movable side plate can be easily assembled to a position where the edge of the adjacent side plate and both edges of the movable side plate are in contact with each other. In addition, when the contact with the adjacent side plate is incomplete, it is also possible to align the movable side plate while vibrating the movable side plate by appropriately repeating the operation using the angle changing means.

As described below, the mold of the present invention functions to facilitate the release of molded products, and also functions to facilitate positioning during mold assembly.

[Example] Next, an example of the present invention will be described based on the drawings.

Figures 1 and 2 show the formwork of the present invention, and Figures 3 (a) to (a).
C) shows the bottom mold, Figures 4 (a) and (b) show the inner mold in the widened state, and Figures 5 (a) and (b) show the inner mold in the reduced width state.
Figures 6 (a) to (c) show the movable side plates, Figure 7 (a),
In (b), there is a spacing adjustment member that adjusts the spacing at the top of the formwork.
FIG. 8 shows a fixing mechanism for the lower part of the movable side plate.

In this example, the formwork of the present invention is applied to the molding formwork of box culter 1 to cement molded products for waterways. and,
Outer molds 5 are arranged on all sides of the bottom mold 10 to surround the inner mold 30.
0, an actuator 70 that is disposed on the bottom mold 10 and operates to expand and contract the inner mold 30, an upper mold 80, and a spacing adjustment member 90.

The bottom mold 10 has rail members 11a arranged in parallel.

11b, girder members 13a to 13c arranged in an H-shape in the center of the rail parts vJ11a and 11b, and girder members 13a to 1
3c and a bottom formwork 14 having a cross-sectional shape as shown in FIG. 3(c). The bottom formwork 14 includes a bottom plate 15 having a rectangular opening in the plane as shown in FIG.
17b, and a top plate 19 which is placed on the side plates 17a and 17b and bent to form a fitting step at the lower end of the molded product 100. Inner plate 1
There is a groove 2 on the entire upper circumference of 7a for fitting the backing hole.
1a, and the outer plate 17b is provided with rail members 11a, 1.
A similar groove 21b is provided at the top of the side perpendicular to 1b. In addition, the top plate 19 has side plates 5'la and 5'lb that constitute the outer mold 50 on sides parallel to the rail members '11a and 11b.
is connected to the bottom end of.

Inner mold 30 [Jl, is configured to be expandable and contractible, and includes a pair of first wedge-shaped formwork members 31a and 31b that are arranged opposite to each other and whose width is reduced from top to bottom, and a first wedge-shaped formwork. Part number 3'
1a, 31b, and a pair of second wedge-shaped form members 33a, 33b which are necessarily arranged adjacent to each other and widen from top to bottom, and a sliding surface is formed between each wedge-shaped form member. There is. That is, sliding plates 35a to 35d are provided on both side edges of the first wedge-shaped form members 31a and 31b to protrude perpendicularly to the circumferential surfaces 36a and 36b toward the inside of the inner mold 30, and similarly, sliding plates 35a to 35d are provided on both side edges of the first wedge-shaped form members 31a and 31b to protrude perpendicularly to the peripheral surfaces 36a and 36b. The wedge-shaped formwork members 33a and 33b are provided with sliding plates 37a to 37d, and each sliding plate 35a to 35d
, 37a to 37d form a sliding surface.

Here, four elongated slide holes 39 are provided on the center line in each of the sliding plates 37a to 37d.
35c and the sliding plates 37a to 37c, and a slide piece 41 that slides in the slide hole 39 is inserted into the sliding plate 35a to 35c.
Each of the four pieces is fixed to a predetermined position of 5c by fastening. A sliding roller 43 is provided at the penetrating end of the sliding piece 41.
Each of the slide plates 37a to 37c can be moved around the sliding plates 37a to 37c.

Further, as shown in FIG. 4(b), the actuator 70 is bolted onto the finger member 13c and disposed at the center of the inner mold 1O. The actuator 70 is a hydraulic cylinder, and the upper end of the lot 71 is connected to the first wedge-shaped frame member 31a,
Arm member 4 disposed via link 45 between 3Ib
It is pin-jointed to the lower surface of the center of 7 so that it can swing freely. still,
Hydraulic pressure is supplied to the actuator 70 from a hydraulic source via a hydraulic pipe led to the outside of the molding frame 1 through an opening provided in the finger member 13a or 13b, although not shown.

Next, the outer mold 50 will be explained. The outer mold 50 has side plates 1a and 51b whose lower ends are connected to the bottom mold 10 as described above,
It consists of movable side plates 51C and 51d that are movable along the rail parts tel1a and tel11b.

The movable side plates 51C and 51d are made up of a plate material 52, and lower frames 55 each having two wheels 53 are provided on the left and right sides, and a support 57 is erected at each end of the lower frame 55. There is. A swing shaft 59 is provided at the upper part of the support column 57 so as to span between the support supports, and a swing lever 61 is provided at the end of the swing shaft 59. As shown in FIG. 6, the swing shaft 59 is cut at the center of the support column 57, and the cut portion is connected to the swing shaft 59 by an eccentric shaft 63 eccentric to the swing shaft 59. ing.

One end of 1 non-black 5 is supported on the eccentric shaft 63,
The other end of the link 65 is pivotally supported at a predetermined position on the plate member 52. Further, although the plate material 52 is suitably reinforced with a reinforcing material, it is provided with a non-reinforced portion 67 at the bottom as shown in the figure. As will be described later, the non-reinforced portion 67 acts as a hinge portion when the swing lever 61 is operated. Here, the pillar 57
, the swing shaft 59 corresponds to the angle changing means, and the movable side plate 51
c.

The angle of 51d with respect to the bottom mold 10 can be changed between an outwardly inclined position and an upright position.

Note that the side plates 51a and 51b also have the same configuration as the movable side plates 51c and 51d, except for the configuration of the wheels 53. Further, an upper mold 80 is provided on the upper part of each side plate 51a to 51d to form a fitting stepped portion at the upper end of the molded product 100 so that the molded products fit together when forming a waterway with the molded product 100. It is being

The spacing adjustment member 90 includes a rod 91 whose one end is pivotably supported at the upper end of the inner mold 30, a presser arm 93 screwed onto the free end of the rod 91 with a nut, and a presser arm 93.
The clamping arm 95 is pivotally supported on the free end of the clamping arm 95 . As shown in the figure, the presser arm 93 is provided eccentrically upward with respect to the axis of the rod 91, and has a bent shape with its free end below the axis. A support shaft 97 is supported by the bent tip so that its center is below the axis of the rod member 91. Further, at the free end of the tightening arm 95, a notch 10 is provided at the upper end of the outer mold 50 as shown in the figure.
1 is provided, and a swing lever 103 is provided at the end on the support shaft 97 side.

As shown in FIG. 7(A), the notch 101 is formed by hooking the hooking rod 99 and then swinging the tightening arm 95 in the interval adjustment direction (counterclockwise in the figure) to connect the presser arm 93 and the tightening arm. 95 so that a hooking rod 99 can be held on the axis of the lot 91.

Next, the effects achieved by each configuration will be described in accordance with the procedure for manufacturing the molded product 100 using the mold 1 and taking it out.

First of all, to explain the assembly of formwork 1, as shown in the top)
The bottom mold 10 has a concave part in the shape of a mouth in the center,
The inner mold 30 is fitted into the recessed portion, and the outer wall surface of the inner mold 30 and the inner plate 17a of the bottom mold frame 14 are brought into close contact with each other via the backing material, so that the inner mold 30 is in a state where it can produce the molded product 100. be done. At this time, the actuator 70 acts to move the first wedge-shaped formwork member 318.31b downward, and along with the downward movement, the sliding surfaces 35a to 3
5d, and the second wedge carving frame part v via 37a to 37d.
U'33a, 33b are moved in the width widening direction. On this occasion,
The second wedge-shaped formwork members 33a and 33b must be grounded on the finger members 13a to 13C in advance, and since the actuator 70 is installed at the center of the bottom mold 10, no alignment is required. It is moved to a position where it comes into close contact with the bottom formwork 14 without any contact.

Here, the part corresponding to the bottom of the bottom mold 10 is connected to the finger member 138.
~13C, the ground contact area of the second wedge-shaped frame parts tJ'33a, 33b is small, so the frictional force of the ground contact part during expansion/contraction movement is small, and the above-mentioned operation is executed smoothly. .

Next, the outer mold 50 is assembled. Movable side plates 51c, 5
1d is moved to a predetermined position, and the adjacent side plates are tightened with the clamps 109.

At this time, the side plates 51a to 51d are tightened and assembled in a state in which they are perpendicular to the bottom mold 10, as shown by solid lines in FIG. 6(A). At this time, please refer to Figure 6 (
The swing lever 61 is swung in the direction of the arrow a), and the movable side plate 51d is tilted as shown by the two-dot chain line in the figure, and the side plate 51a is
, 51b, and then by swinging the swinging lever 61 in the direction of the arrow shown in the figure, the side plate 5
The upper mold 80 can be press fit and aligned between 1a and 51b. As shown in FIG. 2, the upper mold 80 has tapered ends on both sides at the upper part of each of the side plates 51a to 51d, and if the side plates 51a to 51d are assembled in the above procedure, the adjacent upper molds 80 are the same. The positioning can be easily done by the action of 10. Moreover, the movable side plate 5 is placed between the adjacent side plates 51a and 5Ib.
Even if 1d is not pressed in smoothly, the swing lever 6
1, it is possible to force the movable side plate 51d between the side plates 51a and 51b easily and reliably. Incidentally, by repeatedly rocking each of the side plates 51a to 51c other than the movable side plate 51d in the same manner as described above, reliable alignment can be performed.After that, by tightening with the clamp 109, the outer mold 50 is not distorted. Never assembled in condition. This is because a non-reinforced part 67 is provided in a straight line only at the bottom of each side plate 51a to 51d, and the other parts are strongly reinforced, and a link 65 is provided on both sides of the plate material 52 at approximately the center in the vertical direction. By providing a swing shaft 59 spanning almost the entire width of the plate material 52 between two pillars 57 strongly constructed of H-shaped steel at positions at a predetermined distance on the outside of the plate material 52, the non-reinforced portion 67 is transformed into a hinge portion. As a result, the plate member 52 can reliably perform a predetermined swinging motion without being distorted both vertically and horizontally.

Further, the lower portions of the movable side plates 51c and 51d are provided with a tightening member 110 similar to the interval adjusting member 90, as shown in FIG. The member numbers shown in FIGS. 7(a) and 7(b) plus 20 are shown, and detailed explanations are omitted.

Note that, unlike the interval adjustment member 90, the right end of the lot 111 in the drawing is attached to the slide member 125 provided on the lower frame 55 with the pin 1.
27, and the tightening arm 115
does not have a notch and is directly supported by the hook rod 119. When tightening, the swing lever 113 swings in the direction of the arrow in the figure, so that the pin 127 slides on the slide member 125 and is guided to the hook 129 provided at the bottom of the bottom formwork 14. The hook 129 is configured to tighten between the hook 129 and the hook bar 119.

When the bottom mold 10, inner mold 30, and outer mold 50 are assembled in the predetermined positions as described above, the inner mold 30
The distance between the outer mold 50 and the outer mold 50 is maintained at a predetermined value. Although not shown in the drawings, in this embodiment, two space adjustment members are provided at the corners of each wedge-shaped formwork member 318, 31b, 33a, and 33b.
A total of eight pieces are provided, and each of the side plates 51a to 51d can maintain a predetermined distance from the inner mold 30 at two positions.

Next, the production and removal of the molded product 100 will be explained based on FIGS. 4(a) and 4(b).

First, a molding material such as cement I is injected into the molding space of the mold 1 assembled as described above.

After that, the molding material solidifies after a predetermined period of time and the molded product 10
0 is manufactured as shown in FIG. 4(b).

Next, the interval adjustment member 90, the clamp 109, the tightening member 1
10 are all released, and the movable side plates 51C and 51d
is moved to a position where the molded product 100 can be taken out. At this time, the top surface of the upper die 80 and the molded product 100, or the plate material 5
2 and the side surfaces of the molded product 100 are in close contact with each other. Therefore, in order to facilitate the above-mentioned movement, the swing lever 61 is operated in advance to tilt the plate 52 at a predetermined angle around the non-reinforced portion 67 as shown in FIG. 6(a) or (c). After the above-mentioned close contact state is eliminated, the movable side plate 51C251d is moved to a position where the molded product 100 can be taken out.

That is, in FIG. 6(A), the swing lever 61 swings in the counterclockwise direction as shown, so that the plate member 52 swings around the non-reinforced portion 67. At this time, the rotational moment acting on the plate material 52 is maximum at the upper end and decreases toward the lower end. Therefore, the molded product 100 is released from the mold sequentially from the top downward, and is released stably and reliably even without applying a mold release agent.As a result, the molded product 100 also has the following properties: No impact force acts on the moving side plate 51d,
There is no need to worry about damage or vibration.

In this way, after the molding of the molded product 100 and the movable side plate 5''IC, 51d is completed, the movable side plate 51G is removed.

51d can be easily moved along the rail portions U'11a and 11b without requiring excessive driving force.

Further, the other side plates 518.51b are also tilted in the same manner, thereby eliminating the close contact between the molded product 100 and the outer mold 50.

Next, by driving the actuator 70 and pushing the arm 47 upward, the link 45 moves the arm 47.
each first wedge-shaped formwork member 31a, 31b articulated with
is pushed upward.

Along with this, the slide piece 43 moves to the upper end of the slide hole 39, and the second wedge-shaped form members 33a, 33b move toward the center of the inner mold 30 by an amount corresponding to the slope of the sliding surface. be done. At the same time, the first wedge-shaped formwork member 31
a, , 31b also move toward each other due to the action of the link 45, and the inner mold 30 as a whole enters a width-shrinking state around the actuator 70. As a result, molded product 100 and inner mold 3
0, and the molded product 100 can be easily taken out using cleaners or the like.

After that, when manufacturing a molded product again, use the formwork 1 described above.
According to the assembly procedure, actuator 70, moving side plate 5
1c, 51d, and the swing lever 61 are operated, and each mold is easily and reliably assembled in a predetermined positional relationship by the interval adjusting member 90, clamp 109, and tightening part IJ110.

Here, the interval adjustment part iJ 9 adopted in this example
The effects of 0 will be explained in more detail based on FIGS. 9(a) to 9(c) and FIG. 10.

Since the interval adjusting member 90 is constructed as described above, first the hooking rod 99 is inserted into the notch 1 as shown in FIG. 9(a).
01, then turn the swinging lever 1 in the counterclockwise direction shown in the figure.
Operate 03. Then, the outer mold 50 is moved in a direction approaching the inner mold 30.

As shown in FIG. 9(B), when the swinging lever 103 is swung to a position where the support shaft of the rod 91, the support shaft 97 of the tightening arm 95, and the hook bar 99 are in a straight line, the inner mold The distance between the outer mold 30 and the outer mold 50 is the smallest. Thereafter, by roughly operating the swing lever 103, the hooking bar is positioned above the line D-D in the figure and is held between the presser arm 93 and the tightening arm 95, as shown in FIG. 9(c). That will happen. here,
By operating the swing lever 103 from the state shown in FIG. 9(a) to the state shown in FIG. When it is finally tightened, it will be pushed back △d as shown in the figure. As a result, as shown in FIG.
The force Fl acts on the upper part of F2, and the outer mold 50 is deflected as shown in the figure, and the lower part is reversed as shown in F2.
As a result, the outer mold 50 will not shift outward even if the pressure P of the molding material injected between the two molds 30 and 50 is applied.

Therefore, an excessive load is not applied to the tightening part tyf' 110, and the outer mold does not bulge outward.Especially when molding a long object, the upper part of the inner and outer mold 30.50 as shown in this embodiment is prevented. It is only necessary to tighten them with the interval adjusting member 90, and there is no need to fix a hand or the like for preventing bulge to the outer periphery of the outer mold 50, making it possible to manufacture a molded product with high precision in an extremely simple manner.

Although one embodiment of the present invention has been described above, the present invention is not limited to this in any way, and various embodiments can be adopted without departing from the gist thereof.

For example, as the angle changing means, a wire may be provided between the movable side plate and the column and the length of the wire may be changed to tilt the wire, or a rod similar to the distance adjusting member 90 may be provided. The angle of tightening of the nuts 1 to 1 may be changed by releasing them.

Note that the angle change range is not limited to between the upright position and the outwardly inclined position, but may also be changeable from the inwardly inclined position to the outwardly inclined position. Effective when press-fitting between adjacent side plates.

As described in detail of the invention, according to the mold of the present invention, it is easy to release the molded product when taking out the molded product, and there is no need for measures such as a mold release agent.
This prevents damage to the molded product and prevents the movable side plate from vibrating and preventing smooth movement. As a result, we were able to significantly improve work efficiency and productivity.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of the formwork of the example, Fig. 2 is a partially cutaway front view of the same, Fig. 3(a) is a plan view of the bottom mold,
B) is a cross-sectional view taken along line A-A, FIG. 4C is a cross-sectional view showing the cross-sectional shape of the bottom mold, and FIGS. 5(a) and 5(b) are perspective views and sectional views illustrating the state of the inner mold when taking out the molded product, FIG. 6(a) is a front view of the movable side plate, Figure 8 is a front view showing the tightening part, and Figures 9 (a) to (c) and 10 are the functions of the interval adjustment member. An explanatory diagram is required. 1... Formwork 2... Bottom mold 30... Inner mold 50... Outer mold 51a, 51b... Side plates 51c, 51d... Moving side plate 52... Plate material 53... Wheels 55 ... Lower frame 57 ... Support column 59 ... Swing shaft 61 ... Swing lever 63 ... Eccentric shaft 65 ... Link 67 ... Non-reinforced part 70 ... Actuator 80 ...・Upper mold 90... Spacing adjustment part 100... Molded product 110... Tightening member

Claims (1)

[Claims] By providing at least one movable side plate, assembling a plurality of side plates including the movable side plate on a bottom mold to form a space for manufacturing a molded product, and moving the movable side plate outward. A mold that facilitates removal of a molded product, characterized in that the movable side plate is provided with angle changing means for changing the angle formed between the movable side plate and the bottom mold.