JP4088820B2 - Manufacturing equipment for linear body reinforced resin reinforcement - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to the production of a linear body-reinforced resin reinforcing material, and more particularly to a production apparatus for forming a continuous helical resin projection on the surface of a linear body.
[0002]
[Prior art]
Conventionally, a linear body reinforced resin reinforcing material is obtained by spirally twisting a linear body bundle impregnated with a resin (Japanese Patent Laid-Open No. 11-222784) or a linear body bundle with a flexible tube or the like. There is a coated or semi-cured linear body bundle having a surface with irregularities by means of gears (Japanese Patent Laid-Open No. 6-297591). In addition, as a linear body reinforced resin reinforcing material that exhibits adhesion to concrete equal to or better than metal reinforcing bars, a reinforced linear body impregnated with a thermoplastic resin is used as a core, and its surroundings are thermosetting. A material in which a reinforced linear body impregnated with a resin is spirally wound is disclosed. (JP-A-7-317214)
However, since these linear body reinforced resin reinforcing materials use a thermosetting resin for the reinforced linear bodies forming the protrusions, they need to be cured by heating.
[0003]
[Problems to be solved by the invention]
Therefore, in order to solve the problems of the prior art, the present inventors have a processing apparatus for forming a spiral projection made of resin around a linear body impregnated with resin as a core material. The purpose is to provide. In the processing apparatus, after impregnating the linear body with resin, the linear body is not twisted, and the linear body is not entangled with the rotating shaft in the circumferential direction of the linear body. An object of the present invention is to provide a device capable of performing a rotational motion.
[0004]
[Means for Solving the Problems]
That is, the present invention has the following configuration.
1. A mechanism that impregnates the linear body passing through the nozzle with resin, a mechanism that imparts a rotational motion larger than the nozzle diameter to the resin-impregnated linear body, and a mechanism that pulls the linear body impregnated with resin. An apparatus for producing a linear-body-reinforced resin reinforcing material, comprising:
2. The line according to the first aspect described above, wherein the mechanism unit that provides the rotational motion has a rotating disk that is supported by a free roller on the outer periphery and that is driven by a gear and does not have a central axis. Manufacturing equipment for shaped body reinforced resin reinforcement.
3. The mechanism unit for imparting a rotational motion is characterized in that a connecting rod is arranged on the side surfaces of a pair of gears rotating at the same cycle, and the outer periphery of the gear is connected by a timing belt. Equipment for manufacturing linear body reinforced resin reinforcement.
[0005]
By adopting such a configuration, the linear body impregnated with resin between the die and the take-off roller is given a rotational motion larger than the nozzle diameter, and the linear body thread path forms a truncated cone and is a continuous resin protrusion. In addition, there can be obtained a resin reinforcing material manufacturing apparatus that does not twist the linear body and a linear body reinforced resin reinforcing material manufacturing apparatus that can increase the number of spindles.
[0006]
The present invention is described in detail below.
First, the linear body-reinforced resin reinforcing material (hereinafter abbreviated as a reinforcing material) referred to in the present invention refers to a molded product in which a linear body is coated and impregnated with a resin.
Next, the resin protrusion disposed on the surface of the linear body axis refers to a thread-shaped protrusion formed on the surface of the reinforcing material as shown in FIG.
Further, the yarn path of the reinforcing material coming out of the die forms a truncated cone, and the rotational motion given to the reinforcing material is the rotational motion in the circumferential direction with respect to the nozzle center as shown in FIG. 2 and the axis between the processing machines. Say.
Finally, the nozzle diameter, the length of the parallel part, and the introduction angle of the introduction part reaching the nozzle parallel part are as shown in FIG.
[0007]
The present invention has the greatest feature in the mechanism portion that gives rotational motion to the reinforcing material in a plane perpendicular to the axial direction of the reinforcing material, and the purpose thereof is to form a spiral made of resin around the linear body. It is providing the manufacturing apparatus which shapes a protrusion.
In the present invention, a method is proposed in which a disk rotating in the circumferential direction of the reinforcing material is installed between the die and the take-up device, and the reinforcing material is eccentrically shaped by rotating the disk.
The reinforcing material 6 pulled out from the die 5 passes through a processing machine 7 positioned between the drawing device. This processing machine is a method of opening a through hole concentrically with respect to the central axis on a rotating disk having no through axis at the center, and decentering the axis through a reinforcing material in the through hole. Here, the feature of this rotating disk is that it does not have a central axis, and supports its outer periphery with three free rollers, and is driven with a gear disposed at the lower point. By adopting such a support and drive method, the reinforcing material can be rotated for the first time without being entangled with the rotating disk.
[0008]
The spiral projection is formed in the nozzle portion of the die. When a rotational motion is imparted to the reinforcing material extracted from the nozzle portion by the processing machine as described above, the reinforcing material performs a rotational motion along the nozzle inner diameter at the nozzle portion. If the nozzle inner diameter is larger than the apparent diameter of the focused linear body, the linear body scrapes off the resin on the front surface in the rotational direction, resulting in resin protrusions on the reinforced linear body. become.
There are three important items in the shape of the reinforcing material: the period (pitch) of protrusions, the difference in diameter between peaks and valleys, and the shape between peaks and valleys. All of these are important items for expressing the anchor effect between the reinforcing material and the concrete when embedded in concrete. The pitch determines the anchoring effect of the reinforcing material and the critical linear body length that generates the minimum drawing shear stress.
The peak-to-valley diameter difference and peak-to-valley shape determine the drawing shear stress after the critical linear body length has been determined. In order to shorten the critical linear body length, a shorter pitch is preferable. If the diameter difference is too large, the resin will cause cohesive failure, and the drawing shear stress will be reduced. On the other hand, if it is too small, the catch becomes small and sufficient pulling stress cannot be obtained. Therefore, in order to control the pitch, the peak-valley diameter difference, and the three shapes, it is important to design a processing machine and a die that give a rotational motion.
[0009]
First, the pitch is determined by the rotational speed of the processing machine. Therefore, it is required for the rotation of the processing machine that there is no rotation unevenness, that the axis is not shaken, and that the rotation is possible at high speed. Careful attention must be paid to rotation spots because they lead to pitch fluctuations. For example, in the processing machine shown in FIG. 4, it is effective to reduce the moment of inertia by reducing the weight of the connecting rod, and to attach a balancer. There is no problem if the rotational spots are 10 (%) or less of the predetermined rotational speed.
Next, the diameter difference between the peaks and valleys is determined by the rotation radius of the processing machine, the distance from the die, and the shape of the die nozzle part. These two conditions are determined by the size of the truncated cone formed between the nozzle and the processing machine.
When the angle formed by the generatrix and the horizontal line of the truncated cone becomes smaller, the radius of rotation of the reinforcing material at the nozzle outlet becomes smaller and the diameter difference becomes smaller. On the other hand, when the angle is increased, the diameter difference increases, but the reinforced linear body is bent at the nozzle outlet and the through-hole of the processing machine. Therefore, this angle is preferably 1 ° to 45 °. More preferably, it is 1 ° to 30 °, and further preferably 1 ° to 10 °.
[0010]
In the die design, the introduction part and the nozzle part are important. The difference in diameter is determined by the reinforcing linear body and nozzle diameter when focused, and the outer diameter (crest diameter) is almost determined, and the inner diameter (valley diameter) is determined by the nozzle volume and the introduction angle (α) of the introduction section. Is done. Although the reason for this is not clear, it is considered that the protrusion is formed by scraping off the resin in the nozzle and the volume of the nozzle portion is approximately equal to the volume of the protrusion.
When the volume of the nozzle portion is V, the nozzle diameter is d, and the length is L, the volume V is determined by V = π (0.5d) ² L.
When the desired linear body and resin ratio are determined in order to ensure the performance of the reinforcing material, d is inevitably determined, so the volume of this portion is determined to be approximately L. The smaller V is, the clearer the protrusions are, and the larger the difference in diameter between peaks and valleys.
[0011]
In addition, the shape is fine, and there are clear peaks and valleys. Here, the resin impregnation into the linear body is better as the length L of the nozzle portion is longer, and the introduction angle is preferably smaller. However, in consideration of the shape of the projection that affects the anchor effect, L is short and the introduction angle is preferably large in order to increase the difference between the diameters of the peaks and valleys.
In order to solve this conflicting problem, L / d is preferably 0.5 or more and 20 or less, more preferably 1 or more and 10 or less. The introduction angle is preferably 20 ° to 80 °, more preferably 30 ° to 60 °.
[0012]
The reinforcing material impregnated with resin and shaped as described above is taken up by the take-up roller 8 and then wound around the bobbin by the winder 9.
[0013]
FIG. 1 is an example of a linear body reinforced resin reinforcing material obtained by the apparatus according to the present invention.
FIG. 2 shows a schematic diagram of the production process of the present invention. The linear body supplied from the creel stand 1 is opened by the opening bar 3 and the impregnating bar 5 impregnates the linear body with resin. Next, a rotational motion is applied to the linear body by the processing machine 7, whereby a spiral resin projection is formed at the nozzle portion 11 inside the die.
FIG. 3 shows a cross-sectional view of the die of the present invention.
FIG. 4 is a front view and a side view of the processing machine of the present invention. This processing machine does not have a through shaft at the center of the rotating disk, supports the outer periphery thereof with three free rollers, and has a driving gear at the lower point.
Next, FIG. 5 shows a front view and a side view of a processing machine capable of making a multi spindle according to the present invention. The outer periphery of a pair of gears is connected by a timing belt, a connecting rod is arranged on the side surface of the gear, a through hole is provided in the connecting rod, and a reinforcing material is passed therethrough. By adopting such a structure, it is possible to easily increase the number of spindles.
[0014]
And the linear body reinforcement | strengthening resin reinforcement manufactured by this invention can cut | disconnect to predetermined length, and if it knead | mixes into concrete, a structure with remarkably high toughness can be obtained. Alternatively, if it is used as a reinforcing bar in a continuous state, a light and tough structure can be obtained. Conventionally, a thermosetting resin was used to bond the spiral projection to the core material, but by using the processing machine of the present invention, the spiral projection directly from the resin coated on the core material. Can be formed. Thereby, the process (heat curing) of adhering the spiral projections is not required, and the manufacturing process can be shortened.
[0015]
【The invention's effect】
According to the present invention, it is possible to form a continuous helical resin protrusion on the surface of a linear body, and it is possible to easily manufacture a linear body reinforced resin reinforcing material capable of increasing the weight. did.
[Brief description of the drawings]
FIG. 1 is a side view of a linear body reinforced resin reinforcing material obtained by a production apparatus of the present invention.
FIG. 2 is a schematic view of the production process of the present invention.
FIG. 3 is a sectional view of a die of a mechanism portion impregnated with the resin of the present invention.
FIGS. 4A and 4B are a front view and a side view of a mechanism portion that gives a rotational motion according to the present invention. FIGS.
FIGS. 5A and 5B are a front view and a side view of a mechanism unit that gives a rotational motion that enables a multi-concentration in the manufacturing apparatus of the present invention.
[Explanation of symbols]
1. 1. Creel stand 2. Linear body Opening bar 4. Curved bar 5. 5. Impregnation bar Reinforcing material7. Processing machine 8. Take-up roller 9. Winder 10. Introducing section 11. Nozzle part 12. Through hole 13. Free roller 14. Drive gear 15. Rotating disk 16. Driving disk 17. Connecting rod 18. Timing belt 19. Followed disk 20. Through hole 21. Drive motor

Claims (3)

A mechanism that impregnates the linear body passing through the nozzle with resin, a mechanism that imparts a rotational motion larger than the nozzle diameter to the resin-impregnated linear body, and a mechanism that pulls the linear body impregnated with resin. An apparatus for producing a linear-body-reinforced resin reinforcing material, comprising: The mechanism that gives the rotational motion is supported by a free roller on the outer periphery, and has a rotating disk that is driven by a gear and does not have a central axis but has a through hole concentrically with respect to the central axis. The manufacturing apparatus of the linear body reinforcement | strengthening resin reinforcement material of Claim 1 characterized by the above-mentioned. The mechanism unit that provides the rotational motion includes a connecting rod provided with through holes on the side surfaces of a pair of gears that rotate at the same cycle, and the outer periphery of the gear is connected by a timing belt. Item 2. An apparatus for manufacturing a linear body-reinforced resin reinforcing material according to Item 1.

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