JPS61119512A - Floated carrying of pre-cured mold - Google Patents

Abstract

PURPOSE:To improve the direct advance performance and the stability of the dimension and the shape, in floated carrying system of pre-cured extrusion mold of such as cement, by floating the pre-cut section and the cut section through the fluid ejecting pressure then guiding and moving through the extruding force of an extruder. CONSTITUTION:The pre-cured cut mold 1 extruded continuously through an extruder is floated on the air ejected through an ejector 2 to form a micro space between said mold 1 and the smooth face of the ejector 2. Through air- cushion in said space, said mold 1 is moved through the extruding force at the yet-cut section while floating. Since the mold will move in contactless, it will never collapse to improve the dimensional stability and the direct advancability.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for conveying in the extrusion direction an uncured molded product of a kneaded product of cement, synthetic resin, ceramic, etc. continuously extruded from an extruder; Regarding the device.

[Conventional technology]

Recently, elongated members having various cross-sectional shapes have been frequently used as construction materials. Taking cement mold materials as an example, an extruder extrudes a cement material mixed with water onto a conveyor belt in the form of an uncured molded product, and then, if necessary, onto a pallet placed on another belt. The material is then transferred to a storage room, cut to a required length at an appropriate position, transported in a continuous state, and further sent to a step for curing and curing.

However, when using a conveyor belt or a combination of a conveyor belt and a pallet, the uncured molded product on these conveyor belts is still soft, and if the cross-sectional shape is complex, the upper surface of the conveyor belt etc. In addition, the conveyor belt must have uniform rigidity in the width direction, and furthermore, the conveyor belt must have uneven lateral (meandering) and longitudinal (deflection) speeds that are normally observed. When the molded product is being conveyed or transferred between conveyor belts, the straightness of the cement molded product decreases, causing many problems such as warping, bending, and twisting.

[Problem that the invention seeks to solve]

For this reason, various types of conveyor belts have been proposed in the past, but no matter what type of belt conveyor is used, if the moving speed of the conveyor is not synchronized with the extrusion speed of the extruder, the molded product will expand and contract, resulting in poor linearity. Due to the reduced dimensional stability, complex mechanisms are required for tuning. Furthermore, since it is in the state of an uncured molded product, the cement molded material cannot be guided by a fixed guide member intended to prevent it from swinging.

[Means for solving problems]

The present invention has been made in view of the above, and uses the air cushion principle to completely levitate the uncured molded product and form a thin air film between the conveying device or guide member and the uncured molded product. Direct contact between the conveyor and the uncured molded product is completely eliminated, and the extrusion pressure of the extruder,
The present invention provides a method and apparatus for conveying by jetting fluid or catalytic external force.

The gist of the method of the present invention is that the uncut parts and cut parts of an uncured molded product of a kneaded product of cement, synthetic resin, ceramic, etc., which has been continuously extruded from an extruder and cut into predetermined lengths, are cut in the extrusion direction. The uncut portion and the cut portion are floated by a fluid ejected from a long ejector, guided by the ejection surface of the ejector, and moved by means of moving the ejector in the longitudinal direction. This is a floating transportation method for uncured molded products.

Further, the gist of the apparatus of the present invention for carrying out the above method is that cement is continuously extruded from an extruder and cut into predetermined lengths;
This is a device that conveys the uncut parts and cut parts of uncured molded products of mixed materials such as synthetic resins and ceramics in the extrusion direction, and is a long fluid jet disposed almost horizontally in the extrusion direction of the extruder. a pressurized fluid chamber formed over substantially the entire length of the ejector, the ejector having a top cross-sectional shape substantially corresponding to a bottom cross-sectional shape of the uncured molded product; The upper surface is provided with a large number of ejection holes each communicating with the pressurized fluid chamber, and at least a part of the ejection holes is provided approximately at right angles to the upper surface of the ejector, so that the remaining ejection holes are This is a floating conveyance device for an uncured molded product, characterized in that the hole is provided in an upwardly inclined shape with respect to the extrusion direction of the uncured molded product.

[Effect]

According to the present invention, an uncured molded product extruded from an extruder and cut into a predetermined length is floated by a fluid ejected from a jetting device, and guided along the jetting surface of the jetting device by the jetting action of the jetting fluid, Since a guide means for moving the ejector in the longitudinal direction is used, there is no need for a complicated conveyor belt that is used in direct contact with the conventional method, and a guide member that degrades the linearity and dimensional stability of the molded product.The structure is simple and extremely practical. It is true.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In FIGS. 1 to 3 showing the first embodiment of the present invention, an uncured molded product l continuously extruded and cut from an extruder (not shown) has a chevron-shaped cross-section. A stationary fluid ejector 2 is disposed directly below the front of the die along the extrusion direction.

The ejector 2 serves as an indirect support for the uncured molded product 1. The ejector 2 is a horizontally arranged elongated structure, and its upper cross-sectional shape is formed into a chevron shape corresponding to the bottom cross-sectional shape of the uncured molded product 1.

In this embodiment, the ejector 2 is formed into a triangular shape for convenience, and a pressurized fluid chamber 3 is provided inside the ejector 2 over almost the entire length thereof. In addition, an upper surface (ejection surface) 2 facing the bottom surface of the uncured molded product 1
A is formed in a smooth shape and has a large number of ejection holes 4, each communicating with a pressurized fluid chamber 3, over a region facing the bottom surface.

Fluid, for example air, supplied from a fluid source (not shown) to the pressurized fluid chamber 3 is ejected from the ejection hole 4 uniformly or with a controlled air volume. Therefore, when the uncured molded product 1 that has been continuously extruded and cut from the extruder is placed on the ejector 2, the air silane produced by the continuously ejected air creates a gap between the uncured molded product 1 and the ejector 2. The uncured molded product 1 is in a floating state while maintaining a fluid layer with a very small thickness, and is moved under the pressure of the subsequent uncut portion. At this time, although the uncured molded product 1 and the ejector 2 are not in contact with each other, the ejector 2
Since the top surface of the uncured molded product 1 has a cross-sectional shape corresponding to the bottom surface of the uncured molded product 1, the straightness of the uncured molded product can be maintained even without a guide member that guides the uncured molded product in contact with it.

In addition, in Fig. 1, the uncured molded product and the ejector are shown separated for clarity, and the ejected fluid floats the uncured molded product l as shown in Fig. 2. After that, it is discharged from the periphery to the outside. As shown in Fig. 3, the direction of the axis of the jet hole 4 is perpendicular to the upper surface 2A in the area A near the exit of the extruder, and the direction of the axis of the jet hole 4 is perpendicular to the upper surface 2A in the area A near the exit of the extruder. The area in front of region B is formed to be inclined upward with respect to the extrusion direction. This is because in region A, the extrusion pressure of the extruder has sufficient moving force (feeding) to move the uncured molded product 1 in the uncut portion, but in region B, the uncured molded product 1 in the cut portion is moved. This is because the uncut parts must be transported to another jetter and removed from the stream to prepare the jetter for receiving subsequent cut products.

In the above explanation, the distribution of jet ports with different jet directions is simply expressed as 2.
Although it was divided into areas, considering the necessary degree of levitation and transportation,
However, rapid forwarding of the cutting part is not limited to the method of changing the ejection direction as described above, and it is also possible to apply acceleration force by lightly and intermittently contacting the protrusions attached to the surface of the rotating body. , the driver may manually accelerate the vehicle slightly.

FIG. 4 shows a case where the uncured molded product 1 is a flat plate, and the upper cross-sectional shape of the ejector 2 is formed into a channel shape surrounding the lower cross-sectional shape of the uncured molded product 1. In this case, the ejection holes 4 are also provided in the flange portion of the channel cross section. If the uncured molded product 1 is deflected in the width direction of the channel during extrusion conveyance and a difference occurs in the left and right gaps 5 and 6 between the uncured molded product 1 and the flange portion, for example, the gap 6 is larger than the gap lv5. Then, the pressure in the gap 6 becomes lower than the pressure in the gap 5 due to the fluid discharged upward, so that the uncured molded product 1 is pulled to the right in FIG. 4 and balanced.

FIG. 5 shows a case where the uncured molded product 1 is a round tube, in which case the upper cross-sectional shape of the ejector 2 is formed into a semicircular shape surrounding the lower cross-sectional shape of the uncured molded product 1.

〔Effect of the invention〕

The present invention is configured as described above, and the uncut portion and the cut portion of the uncured molded product extruded from the extruder and cut into a predetermined length have an upper cross-sectional shape corresponding to the bottom cross-sectional shape of the uncured molded product. Since the uncured molded product is floated and guided on a jetting machine with a 300mm diameter, and moved by the extrusion pressure of the extruder, the jetting angle of the fluid, or the contact acceleration force to the cutting part, the uncured molded product is completely unaffected by the conveyor belt. Problems such as deterioration in straightness, warpage, bending, and twisting do not occur, there is no need to synchronize the conveyance speed with the extrusion speed of the extruder, and since there is no fixed guide member, there is no possibility of damaging the uncured molded product.

Therefore, it has many advantages over conventional ones, such as improved product quality and extremely simple structure and mechanism.

[Brief explanation of the drawing]

1 is a perspective view showing the first embodiment of the present invention, FIG. 2 is a sectional view of FIG. 1, FIG. 3 is a perspective view of the ejector of FIG. 1, and FIG.
5 and 5 are sectional views showing second and third embodiments of the present invention. 1--Uncured molded product, 2--Ejector, 2A-Top surface (ejection surface) of the ejector, 3-Pressurized fluid chamber, 4--Ejection hole.

Claims (1)

[Claims] 1. Transporting uncut parts and cut parts of an uncured molded product of a kneaded product of cement, synthetic resin, ceramic, etc., which has been continuously extruded from an extruder and cut into predetermined lengths, in the extrusion direction. The uncut portion and the cut portion are floated by fluid ejected from a long ejector, guided by the ejecting surface of the ejector, and moved by means of moving the ejector in the longitudinal direction. A floating conveyance method for uncured molded products. 2. The method according to claim 1, wherein the movement is performed using extrusion pressure of an extruder. 3. The method according to claim 1, wherein the movement is performed by jetting fluid at an angle with respect to the extrusion direction. 4. The method according to claim 1, wherein the cut portion of the uncured molded product is accelerated by contactingly applying an external force in the moving direction of the cut portion to move faster than the uncut portion. 5. A device for conveying in the extrusion direction the uncut portions and cut portions of an uncured molded product of a kneaded product of cement, synthetic resin, ceramic, etc. that has been continuously extruded from an extruder and cut into predetermined lengths, The extruder is equipped with a long fluid ejector disposed substantially horizontally in the extrusion direction of the extruder, and a pressurized fluid chamber formed over almost the entire length of the ejector, and has a top cross-sectional shape of the ejector. The ejector is formed to substantially correspond to the cross-sectional shape of the bottom of the uncured molded product, and the upper surface of the ejector is provided with a number of ejection holes each communicating with the pressurized fluid chamber, and at least one of the ejection holes is formed. Floating conveyance of an uncured molded product, characterized in that the jetting hole is provided substantially perpendicularly to the upper surface of the jetter, and the remaining jet holes are provided in an upwardly inclined shape with respect to the extrusion direction of the uncured molded product. Device.