JP2592043B2 - Paving Stone Block Mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paving stone block molding die for molding a paving stone block generally laid on a pavement.

[0002]

2. Description of the Related Art Conventionally, paving stone blocks laid on a pavement or the like have been used in which spacers are provided on four sides in a vertical direction in order to easily secure a joint gap between the paving stone blocks. The method is to lay the sandstone on the ground before laying it, then simply place the paving stone blocks in an array and put the joint sand between the paving stone blocks so that even unskilled workers can lay it easily and in a short time. Therefore, the spacer is formed so that the upper end thereof is lower than the upper surface of the block, so that the spacer is not exposed after filling with joint sand.

Therefore, as a method of manufacturing the paving stone block, cavities corresponding to upper dies arranged in parallel on the lower surface of an upper block to be lifted and lowered are opened in a mold frame in parallel with each other. The lower die is attached to the upper surface of the lower block base that is vertically moved up and down, pins are arranged at positions on the peripheral surface of the upper die that correspond to the spacers, and the tips of the pins project from the lower surface of the upper die, and The top of the trapezoidal groove that forms the spacer of the paving stone block formed on the inner wall surface that forms the tee is detachable, and the powder material filled in the cavity is compressed by the upper mold, so that the pin The powder material at the upper part of the groove is removed to form a space lacking portion, and the molded body is compression molded so that the upper end of the spacer is lower than the upper surface of the block.

[0004] However, when the upper mold is raised during the removal from the mold, the compressed raw material slightly expands due to the restoring force, and the pressing force due to the expansion of the molded body acts on the pin, thereby increasing the frictional resistance between the molded body and the pin. When the pin is lifted, a force is generated to shift the sliding contact portion of the molded body due to the rise of the pin, and on the other hand, a gap is generated between the upper surface of the molded body and the lower surface of the upper mold, so that there is no pressing force on the upper surface of the molded body. As a result, the corner portion of the sliding contact portion with the pin tip portion, which is weak in strength, shifts easily and is liable to be broken, so that the defect rate is high and the yield is poor.

[0005] On the other hand, if the molding is performed by turning the mold upside down, it is possible to prevent the molded body from being lost at the time of demolding. However, after molding, the molded body is transported to the next step with the front side turned down. If the surface side is easily damaged, there is a disadvantage that a reversing device of the molded body is required.For example, when molding a paving stone block having a pattern such as spots on the surface side, or as a raw material for the upper and lower layers When a paving stone block using an expensive high-quality raw material is formed in the upper layer by changing the above, it is possible to prevent the above-mentioned molded body from being lost, but a new disadvantage occurs.

That is, when the paving stone block is formed as a two-layered body so that the portion lacking the spacer is directed downward, the powder material constituting the upper layer of the molded body is first charged into the cavity. Considering the deposition state of the body material, the fine particles tend to be unevenly distributed in the peripheral part on the surface side of the molded body at the bottom of the cavity, or the vibration during the second filling operation of the powder material constituting the lower layer part Due to the pressure and drop impact, the fine particles uniformly enter between the coarse particles in the upper layer, and the coarse particle density decreases, and the pattern becomes uneven or the spot density decreases during firing, and the desired uniform and clear pattern is obtained. It has a disadvantage that it cannot be obtained or uneven firing shrinkage occurs due to uneven particle size distribution.

[0007]

DISCLOSURE OF THE INVENTION The present invention prevents the molded product from being damaged when the upper mold is released from the mold, and fills the lower layer portion and the upper layer portion with the powder material at the time of filling the powder material. Accordingly, it is an object of the present invention to provide a paving stone block molding die which prevents a clear pattern or the like from appearing on the surface of the paving stone block and prevents uneven firing shrinkage distortion.

[0008]

SUMMARY OF THE INVENTION The present invention is based on the prior art described above, and the problem is that the corner of the sliding contact with the tip of the pin in the molded body is lost when the upper mold for molding the surface of the molded body is released. In view of the above, the upper die arranged at a position corresponding to the upper part of the cavity for filling the raw material is divided into an upper piece clog and an upper piece, and the upper piece is detachably attached to the upper piece clog, and the upper piece clog and the upper piece are obtained. A stretchable separating member such as a compression spring is arranged between the bridges, and a pin is fixed on the clogging surface of the upper bridge. When the mold is removed from the lower surface of the piece, the upper piece gets pressed up against the surface of the molded body by the separating member in the compressed state when the mold is released, pressed and contacted, and the upper piece geta rises first, and only the inserted part that protrudes I try to raise it.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a die for molding a cobblestone block according to the present invention. The upper molds 3, 3a... For molding the front side of the molded body W, the mold frames 5 having the cavities 4, 4a... Corresponding to the upper molds 3, 3a. The lower die 7, 7a ...
Are divided into an upper piece clog 8 and an upper piece 9, and the upper piece 9 is detachably attached to the upper piece clog 8 to form a gap 10 therebetween. The lower dies 7, 7a ... are cavities 4, 4a in the lower bridge base 6, respectively.
And a lower block 12 mounted on the upper surface of the mounting base 11.

Although the lower surface of the upper piece 9 is an uneven surface in the drawing,
The shape is not limited to this, and may be a smooth surface depending on the cobblestone block B, and a plurality of upper dies 3, 3a, etc. have been described.

Are fixing bolts for the upper block 2 and the upper clog 8, and the fixing bolts 13, 13a are mounting corners 14, 14a for the upper dies 3, 3a on the upper block 2, respectively. Are inserted through the stepped holes 15, 15 a ... penetrating into the upper part and screwed into the bolt holes 16, 16 a ... on the upper surface of the upper piece clog 8 to fix the upper piece clog 8 to the upper piece plate 2. .

Numerals 17, 17a... Are suspension bolts in which the upper piece 9 is suspended from the upper piece clog 8 and the suspension bolts 1 are provided.
Are inserted through stepped holes 18, 18a through the upper clog 8 so as to be movable up and down, and the suspension bolts 17, 17 are provided.
a ... The tip is screwed into the bolt hole 19, 19a ... of the upper piece 9, and the bolt head 20 of each suspension bolt 17, 17a ... is in each stepped hole 18, 18a.
The gap between the upper piece clog 8 and the upper piece 9 while being hooked on the step 21
10 is the maximum width and the stepped holes 18 and 18a in the upper block 2
Are formed at the positions corresponding to... Through the receiving holes 22, 22a... Of the bolt head 20 in the contact state of the upper bridge clog 8 and the upper bridge 9.

Reference numerals 23, 23a... Denote telescopic separation members disposed between the upper bridge clog 8 and the upper bridge 9, and in the present embodiment, the separation members 23, 23a are formed as compression springs 24, 24a. , Such compression springs 24, 24a...
, 26, 26a are provided on the lower surface of the upper clog 8 and the upper surface of the upper frame 9.

The separating members 23, 23a... Are compression springs 24, 24.
It is not limited to a, but any material such as an oil-pneumatic cylinder, which can press the upper piece 9 downward against the upper piece clog 8 and can expand and contract, may be used.

Reference numerals 27, 27a... Are guide shafts of the upper block 9, and lower end portions of the guide shafts 27, 27a are fitted into fixing holes 28, 28a. At the same time, the guide shafts 27, 27a... Are fixed to the upper block 9 by screws 29, 29a... Screwed from the side surface of the upper block 9, and the upper ends of the guide shafts 27, 27a. Are slidably inserted into the shaft insertion holes 30, 30a..., And the distance between the upper ends of the shaft insertion holes 30, 30a.

Are pins arranged on the four sides of the upper clog 8 in each of the upper dies 3, 3a.
Are arranged at positions corresponding to the spacers S, Sa in the paving stone block B, and the pins 31, 31a are narrow and thin on the tip side, and the spacer S of the paving stone block W has a sectional shape.
The insertion portion 32 has the same shape as that of S1... The inner surface of the insertion portion 32 can slide freely on the side surface of the upper piece 9, and the insertion portion 32 is It protrudes from the lower surface.

Reference numerals 33, 33a,...
14a ... air holes provided in the center, and the air holes 33, 33
are formed at a right angle from one side surface of the upper piece plate 2 in the long side direction so as not to reach the other side surface.

Numerals 34, 34a are air introduction holes penetrating from the air holes 33, 33a to the lower surface side of the upper piece plate 2. Air blowing holes 35, 35a, which are continuous with the air introduction holes 34, 34a, are located above. It penetrates the piece clog 8.

Are cut-outs to be attached to the press body provided on the long sides of the upper plate 2, and 37, 37a are stoppers provided on both sides on the back surface of the upper plate 2. .

In another embodiment, the horizontal frames 38, 38a arranged in the parallel direction of the upper dies 3, 3a, and the vertical frames arranged on the side portions of the upper dies 3, 3a between the horizontal frames 38, 38a. The frames 39, 39a surround the upper dies 3, 3a, and the inner surfaces of both sides of the horizontal frames 38, 38a and the vertical frames 39, 39a, and the upper dies 3, 3a of the vertical frames 39, 39a. Cut portions 40, 40a are formed at the positions corresponding to the pins 31, 31a on both sides of the space between them, and the blow-in ports 41, 41a which communicate with the gap 10 between the upper piece clog 8 and the upper piece 9 are formed. And suction outlet
Are provided below the upper frame clog 8 in the horizontal frames 38, 38a, and the lower surfaces of the vertical and horizontal frames 38, 38a 39, 39a are set higher than the stoppers 37, 37a.

Reference numeral 43 denotes a liner portion disposed at the center of the mold frame 5, in which a pair of horizontal liners 44, 44a are juxtaposed, and vertical liners 45, 45a are provided between the horizontal liners 44, 44a.
A flange 46 is integrally formed above and outside the horizontal liners 44, 44a, the vertical liners 45, 45a... To form a liner 43, and the cavities 4, 4a are formed by the horizontal liners 44, 44a and the vertical liners 45, 45a. ... and the vertical liners 45, 45a
... the upper surface is set slightly lower than the horizontal liners 44, 44a to form steps 47, 47a, and the flange 46 of the liner 43 is placed and fixed on the step 49 in the mounting opening 48 of the mold frame 5. Thus, the liner 43 is mounted on the mold frame 5.

Are trapezoidal grooves for molding the spacers S, Sa ... of the cobblestone block B. The trapezoidal grooves 50, 50a ...
Are formed in the vertical direction of the inner wall surfaces forming the cavities 4, 4a, that is, the horizontal liners 44, 44a and the vertical liners 45, 45a, and the trapezoidal grooves 50, 50a.
The insertion portions 32 of the pins 31, 31a in.

Next, the operation of the paving stone block molding die according to the present invention will be described. First, a charger (not shown) is reciprocated above the die frame 5 to enter the cavities 4, 4a. When the powder material M is filled and then the upper piece plate 2 is lowered, the upper piece 9 comes into contact with the powder material M in the cavities 4, 4a,. Element
The compression springs 24, 24a, which are 23, 23a, are compressed, and the pins 31, 31a, at the leading end, are inserted into the trapezoidal grooves 50, 50a at the top of the trapezoidal grooves 50, 50a. While removing the powder material M, the gap 10 between the upper piece clog 8 and the upper piece 9 gradually narrows, and from the time when the upper piece clog 8 and the upper piece 9 come into contact with each other, Then, the powder material M is gradually compressed, and the upper block 2 is lowered until the stoppers 37, 37a... Come into contact with the upper surface of the mold frame 5.

Next, when the upper block 2 is lifted after compression molding, the upper block 9 is formed by the compression springs 24, 24a, which are the separating members 23, 23a, from the state in which the upper block 9 is pressed against the upper surface of the molded body W. The upward movement of the upper block 9 is suppressed so as to shift to the pressure contact state in which the pressing force against the upper surface of the body W is sequentially reduced, and to the next contact state, and only the upper block clog 8 rises during this time.

The rise of the upper piece clog 8 causes the pins 31, 31
a ... The insertion portion 32 on the distal end side is gradually pulled out from the trapezoidal grooves 50, 50a ... to form a trapezoidal groove 50, 50a ... upper part as a space, and a gap 10 between the upper piece clog 8 and the upper piece 9 is formed. While gradually expanding, the bolt heads 20 of the suspension bolts 17, 17a.
At the time when the upper piece 9 comes into contact with the step 21 of 18a..., The upper piece 9 rises together with the upper piece clog 8 to release the upper dies 3, 3a. , 7a... Are raised on the mold frame 5 and carried out to the next step by appropriate means.

When a two-layer paving stone block B having a pattern such as spots on the surface or using an expensive and high-quality powdery raw material M in the upper layer is formed, the powder raw material M in the lower layer may be used.
After filling into the cavities 4, 4a..., The fine powder material M in the upper layer portion is filled with the fine particles in the powder material M, the stepped portions on the vertical liners 45, 45a.
Fall into 47, 47a..., And the powder raw material M filled in the cavities 4, 4a.

Further, air is supplied from the air holes 33, 33a of the upper piece plate 2 to the gap 10 between the upper piece clog 8 and the upper piece 9 through the air introduction holes 34, 34a, and the air blowout holes 35, 35a. Air is blown out at all times or at the time of demolding, or air is blown out from the blowing ports 41, 41a to the gap 10 between the upper piece clog 8 and the upper piece 9 and sucked from the suction ports 42, 42a. Department
The powder raw material M that has entered the 10 is forcibly eliminated.

[0028]

In summary, the present invention provides an upper die for molding the front side of a molded body on the lower surface of an upper block which is controlled to move up and down, and a die frame below the upper die. In the corresponding position of the upper mold in, open the cavity to fill the raw material,
In a mold in which a lower mold is attached to the upper surface of a lower piece base which is made to rise and fall relatively to a mold frame, and a trapezoidal groove for forming a spacer of a paving stone block is formed on an inner wall surface forming a cavity, The upper dies 3, 3a... Are divided into an upper piece clog 8 and an upper piece 9, and the upper piece 9 is attached to the upper piece clog 8 so as to be able to freely contact and separate therefrom. Separating members 23, 23
a ... is arranged, and the upper surface of the clogging clog 8 is formed into the cavity 4,
Pins 31, 31a ... at the positions corresponding to the trapezoidal grooves 50, 50a ... of 4a ...
, And the pins 31, 31a...
Can be freely inserted into and removed from the trapezoidal grooves 50, 50a.
The spacers S, Sa ...
Are formed, and the upper portions of the spacers S, Sa... Are lower than the surface of the paving stone block B, and can be integrally molded by a single molding operation.

The upper dies 3, 3a,... Are divided into an upper piece clog 8 and an upper piece 9, and the upper piece 9 is attached to the upper piece clog 8 so as to be freely attached to and separated from the upper piece clog 8. Telescopic separating member 23,
23a are arranged, and pins 31, 31a are arranged on the upper surface clogging peripheral surface 8, so that when the upper dies 3, 3a are removed, the separation members 23, 23 are provided.
The upper piece 9 rises while the upper piece 9 is pressed, pressed, and in contact with the upper surface of the molded body W by a..., the pins 31, 31 a. As a result, the pins 31 and 31a are pressed while the upper surface of the molded body W is pressed by the lower surface of the upper block 9.
.. Can be pulled out, so that the shape of the molded body W is maintained by the contact of the upper piece 9 with respect to the upper surface direction of the molded body W. It is possible to prevent the gap between the upper missing portion and the surface corner from being lost, thereby preventing the occurrence of defective products and manufacturing with good yield.

Since the pins 31, 31a... Are mounted on the upper clogs 8 of the upper dies 3, 3a. Secondly, it is possible to prevent the front side from being damaged at the time of transportation after the mold and does not require a reversing device. Secondly, when the upper layer powder material M is filled, the lower layer powder material M is placed in the cavities 4, 4a. Can be filled into the cavities 4, 4a,... In good distribution at the step portions 47, 47a. The compression molding of the powder raw material M by 3, 3a... Can be performed without being affected by mechanical vibrations other than the compression molding operation, so that a clear pattern appears on the surface of the cobblestone block B. Or uneven firing shrinkage distortion can be prevented.

Also, the separating members 23, 23a.
.., the upper and lower clogs 8 and 9 are moved toward and away from each other by the mechanical separating members 23, 23a, so that the vertical movement of the upper dies 3, 3a and the expansion and contraction of the separating members 23, 23a are synchronized. However, the compression springs 24, 24a... Can naturally move the upper piece clog 8 and the upper piece 9 apart from each other at the time of pressing and demolding by a resilient force. The maximum effect can be obtained with the configuration.

Air blow holes 35, 35 are formed on the underside of upper piece clog 8.
are provided, even if the powder raw material M scattered in the air enters the gap 10 between the upper piece clog 8 and the upper piece 9, the air hole 3
3, 33a... From the air inlets 34, 34a... And the air outlets 35, 35a.
Since the powder material M can be forcibly removed from the gap 10, damage to the upper piece clog 8 and the upper piece 9 can be prevented, and the molding accuracy of the molded body W can be kept constant.

The upper dies 3, 3a...
, 39, 39a ... and the horizontal frames 38, 38a
Blows 41, 41a ... and suction outlet 42 below the upper piece clog 8
Are provided, the same effect as described above can be obtained, and the gap 10 is made substantially closed by the vertical and horizontal frames 38, 38a, 39, 39a. Of the powder material M can be eliminated even if the pressure air is low pressure by sucking and discharging the air press-fitted from the inlets 41, 41a ... through the suction outlets 42, 42a ... The practical effect is extremely large, for example, the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a paving stone block molding die according to the present invention.

FIG. 2 is a side view showing a state in which an upper die is mounted on an upper bridge plate.

FIG. 3 is a bottom view of FIG. 2;

FIG. 4 is an enlarged sectional view of a main part of FIG. 2;

FIG. 5 is a plan view of a mold frame.

FIG. 6 is a bottom view of the upper bridge plate.

FIG. 7 is a bottom view of the upper piece clog.

FIG. 8 is a side view of the same.

FIG. 9 is a plan view of an upper piece.

FIG. 10 is an enlarged sectional view of a main part of a mold in a state where a powder material is filled in a cavity.

FIG. 11 is an enlarged sectional view of a main part of a mold at the start of press molding.

FIG. 12 is an enlarged sectional view of a main part of a mold at the time of press molding.

FIG. 13 is an enlarged cross-sectional view of a main part of the mold in a state where the pin insertion portion is in a precedently rising state when the mold is released.

FIG. 14 is an enlarged sectional view of a main part of a mold at the time of completion of press molding.

FIG. 15 is a perspective view of a paving stone block.

FIG. 16 is a cross-sectional view of an upper mold provided with means for forcibly removing raw materials.

FIG. 17 is a bottom view of the upper die of another embodiment.

18 is an enlarged sectional view of a main part of FIG. 17;

FIG. 19 is a plan view showing a laid state of a paving stone block.

[Explanation of symbols]

 3, 3a ... Upper die 4, 4a ... Cavity 8 Upper bridge clogs 9 Upper bridge 23, 23a ... Separating member 24, 24a ... Compression spring 31, 31a ... Pin 32 Insertion part 35, 35a ... Air blowing holes 38, 38a Horizontal frame 39, 39a… Vertical frame 41, 41a… Inlet 42, 42a… Suction outlet 50, 50a… Trapezoidal groove

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Hei 3-98013 (JP, U)

Claims (4)

(57) [Claims] 1. An upper mold for molding the front surface of a molded body is provided on the lower surface of an upper block that is controlled to move up and down, and a mold frame is provided below the upper mold, and a correspondence of the upper mold in the mold frame is provided. At the position, the cavity for filling the raw material is opened, and the lower die is mounted on the upper surface of the lower block base which is made to rise and fall relatively to the mold frame, and the paving stone block is formed on the inner wall surface forming the cavity. In a mold having a trapezoidal groove forming a spacer, the upper mold is divided into an upper piece clog and an upper piece, and the upper piece is attached to the upper piece clog so as to be freely separated from the upper piece, and the upper piece is caught between the upper piece and the upper piece. A telescopic separating member is provided, and a pin is provided at a position corresponding to the trapezoidal groove on the upper clogging clogging peripheral surface, and the insertion portion on the tip end side of the pin is detachably fitted into the trapezoidal groove. A pavement block molding die characterized by the following. 2. The paving stone block molding die according to claim 1, wherein the separating member is a compression spring. 3. A mold for molding a cobblestone block according to claim 1, wherein air blow holes are provided on the lower surface of the upper clogs. 4. While surrounding the upper mold with vertical and horizontal frames,
3. The paving stone block molding die according to claim 1, wherein an inlet and an outlet are provided below the upper frame clogs of the horizontal frame.