JP3837591B2 - Automatic cutting and dispensing device for synthetic resin coils - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for producing a synthetic resin coil by continuously winding a preheated thermoplastic resin monofilament around a rotary shaping shaft and quenching the coil, and the coil discharged from the rotary shaping shaft is fixed in length. It is related to a device that automatically cuts and pays out in a state, and more specifically, when manufacturing a large diameter synthetic resin coil using a thick synthetic resin monofilament as a material, without stopping the coil manufacturing device, The present invention relates to an automatic cutting / dispensing device for a synthetic resin coil capable of automatically and accurately cutting a coil to a desired length and reliably discharging the coil from the coil manufacturing device without impairing the product quality.
[0002]
[Prior art]
In the fields of various electrical and mechanical equipment, sundries and toys, metal wires have been used as the material for coils used as so-called springs. However, metal coils are prone to rust and are durable. It is inferior in color, cannot be colored, especially because it has sharp edges and is prone to injuries and accidents, and it is heavy and difficult to handle and store. The coil is attracting attention.
[0003]
And as a manufacturing method of the conventional synthetic resin coil, (1) an integral molding method, (2) a method of heating in a state where a resin linear body is wound around a shaping shaft, and (3) a resin on a heated shaping shaft A method of winding a linear body is known.
[0004]
However, the above method (1) has a problem that not only does it take a huge amount of money to produce a molding die, but also the strength of the resulting molded product is poor. In the methods (2) and (3), since a shaping shaft having a spiral groove is used, it is difficult to cope with changes in the wire diameter and coil pitch. Not only can a continuous manufacturing process be adopted, but these methods tend to cause unevenness in the thermal history of the resin linear body, making it difficult to obtain a molded product with uniform dimensional stability and shape stability. There was a problem.
[0005]
Therefore, as a method of manufacturing a synthetic resin coil having good dimensional stability and shape stability by solving the above-mentioned problems, the synthetic resin monofilament is advanced in a tension state, and the glass transition temperature of the monofilament material is not lower than the melting point. A method (Japanese Patent Publication No. 5-72251) has been proposed in which after preheating to the above temperature, the wound monofilament is immediately wound on a rotating shaping shaft, and then the wound monofilament is rapidly cooled.
[0006]
That is, as shown in FIG. 4, the above proposal is just before winding the monofilament M that travels in the direction of arrow A in a tensioned state on the shaping axis B with respect to the shaping axis B that rotates in the direction of arrow B. By passing the preheating device A, it preheats to a temperature not lower than the glass transition temperature and not higher than the melting point, and rapidly cools the monofilament M wound around the shaping shaft B by blowing cold water or cold air from a cooling pipe (not shown). By fixing, the synthetic resin coil C is continuously manufactured in the direction of the arrow C. In addition, the code | symbol D in FIG. 4 is a guide guide which regulates the advancing direction so that the monofilament M wound up by the shaping axis | shaft B may guide the monofilament M correctly to the shaping axis | shaft B, and may not move to the opposite direction. In addition, reference numeral E denotes a presser roll that performs the function of pressing and fixing the monofilament M wound around the shaping shaft B to make the shape uniform.
[0007]
And according to said method, since it becomes unnecessary to provide a spiral-shaped groove | channel in the shaping axis | shaft B, the response | compatibility to the change of a wire diameter coil diameter and a coil pitch is easy, dimensional stability and shape stability Synthetic resin coil C having good properties can be manufactured semi-automatically.
[0008]
However, recently, the required performance for synthetic resin coils is becoming more and more sophisticated. For example, a material monofilament having a diameter of 3.0 mm or more and a large-diameter coil having higher strength is required.
[0009]
However, the above method has a problem that the manufacturing efficiency of the synthetic resin coil is inferior for the following reasons, and a large synthetic resin monofilament having a diameter of 3.0 mm or more, particularly 5.0 mm or more is used as a material. When manufacturing a coil with a diameter, there is a problem that not only the process cannot be fully automated, but also the pitch and outer diameter of the resulting coil are likely to vary, and it is difficult to stably manufacture the coil. It was.
[0010]
That is, in the above method, when the coil C shaped by the rotational shaping shaft B is cut to a predetermined length, the apparatus is temporarily stopped and the coil is cut by guillotine, scissors, nippers, or the like. Because of the necessity, it has been difficult to manufacture the coil completely automatically and efficiently.
[0011]
Moreover, in the case of a relatively small coil having a coil diameter of about 3 to 40 mm, the coil can be cut in a short time and the apparatus can be stopped for a short time, but the coil diameter is about 40 to 250 mm. In the case of a coil, since the diameter of the material monofilament becomes large, it cannot be easily cut, and a large device is required for cutting, and the stop time of the device becomes long. Therefore, the monofilament in the preheating device A As a result, the monofilament is excessively preheated to cause irregularities in the winding condition of the rotary shaping shaft B, and the resulting coil pitch and outer diameter are likely to vary.
[0012]
In addition, the cut coil is discharged from the device via an inclined inclined plate or pipe, but in this case, the coil gets tangled or the pitch increases due to its own weight, resulting in unevenness. In addition, there is a problem that a problem is likely to occur, and it takes time for sorting and storing in a later process, resulting in an increase in cost.
[0013]
[Problems to be solved by the invention]
The present invention has been achieved as a result of studying the solution of the problems in the prior art described above as an issue.
[0014]
Accordingly, an object of the present invention is to automatically produce a coil having a desired length continuously without stopping the coil manufacturing apparatus even when manufacturing a synthetic resin coil having a large diameter using a thick synthetic resin monofilament as a raw material. An object of the present invention is to provide an automatic cutting / dispensing device for a synthetic resin coil that can be cut accurately and accurately and reliably delivered from the coil manufacturing device without impairing the product quality.
[0015]
[Means for Solving the Problems]
In order to achieve the above object, the synthetic resin coil automatic cutting / dispensing device of the present invention continuously uses a thermoplastic resin monofilament preheated to a temperature not lower than the melting point and not lower than the glass transition temperature of the raw material resin on the rotational shaping shaft. In an apparatus for producing a coil made of synthetic resin by automatically winding and rapidly cooling, an apparatus for automatically cutting and discharging a coil discharged from the rotary shaping shaft in a fixed length state. A detector for detecting the number of rotations of the shape axis and an end of the rotation shaping shaft are arranged in parallel to face each other, rotate in the same direction as the rotation shaping shaft, and are discharged from the rotation shaping shaft. A pair of rollers for conveying the coil in the anti-rotation shaping axial direction, a guide mechanism that is arranged with respect to the pair of rollers and widens approximately one pitch of the coil to be conveyed, and a cutting edge is fitted to the guide mechanism And insert this The coil widening portion is interposed between the coil and is activated when the rotational speed of the rotational shaping shaft detected by the detector reaches a predetermined numerical value. A cutter to be cut, and a push-up plate that is disposed below the center portion between the rollers of the pair of rollers, is raised immediately after the operation of the cutter, pushes the cut coil upward from the pair of rollers, and discharges the coil It is arranged in parallel with a pair of rollers, and comprises a receiving base for receiving the coil delivered by the push-up plate.
[0016]
In the automatic cutting / dispensing device for the synthetic resin coil of the present invention, the peripheral speed of the pair of rollers is the same as the peripheral speed of the outer diameter of the coil discharged from the rotary shaping shaft, and the guide mechanism is A pair of guide plates arranged with a gap, a coil insertion hole provided in a lower portion of one guide plate located on the coil introduction side, and a lower portion of the coil insertion hole inclined in the conveying direction of the coil The first inclined wall provided, the coil lead-out hole provided in the center of the other guide plate located on the coil lead-out side, and the lower part of the coil lead-out hole is inclined in the anti-carrying-out direction of the coil. And the second inclined wall is configured to widen approximately one pitch of the coil within the gap between the pair of guide plates, and the pair of rollers and the push-up plate are configured to cut the coil. In sync with Move horizontally by 2 cm or more in the coil conveyance direction, return the cut coil to its original position, and the closing time when cutting the coil of the cutter blade is 0 to 0.5 seconds, the push-up plate Are freely movable up and down through an air cylinder, the wire diameter of the thermoplastic resin monofilament forming the coil is 2.0 mm or more, and the outer diameter of the coil is 40 to 250 mm. It is a preferable condition, and by applying these conditions, it can be expected to obtain a better effect.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the automatic cutting / dispensing device for a synthetic resin coil according to the present invention will be described in detail with reference to the drawings.
[0018]
FIG. 1 is a schematic plan view illustrating the entire synthetic resin coil manufacturing apparatus including the automatic cutting and dispensing apparatus of the present invention. FIG. 2 is a perspective explanatory view illustrating an example of the synthetic resin coil automatic cutting and dispensing apparatus of the present invention. 3 (a) to 3 (e) are perspective explanatory views sequentially showing the coil cutting-discharging process by the synthetic resin automatic coil cutting / dispensing apparatus of the present invention.
[0019]
First, the overall structure of the synthetic resin coil manufacturing apparatus will be described with reference to FIG.
[0020]
In FIG. 1, A indicates a synthetic resin coil manufacturing zone, and B indicates a synthetic resin coil cutting / dispensing zone manufactured by A.
[0021]
The synthetic resin coil production zone is composed of the preheating device 2, the rotary shaping shaft 3, the guide guide 4 and the presser roll 5, and the shaping shaft 3 rotating in the direction indicated by the arrow B advances in the direction indicated by the arrow A in a tensioned state. The monofilament 1 to be wound is preheated to a temperature not lower than the glass transition temperature and not higher than the melting point by passing the preheating device 2 immediately before being wound around the shaping shaft 3, and is illustrated with respect to the monofilament 1 wound around the shaping shaft 3. The synthetic resin coil 7 is continuously manufactured in the direction of the arrow C by quenching and fixing it by blowing cold water or cold air from a cooling pipe not to be cooled.
[0022]
The guide guide 4 accurately guides the monofilament 1 in the tangential direction of the outer periphery of the rotary shaping shaft 3 by the lead means 4 ′ formed by cutting the end surface from the peripheral edge to the peripheral edge of the rotary shaping shaft 3. The winding direction is regulated.
[0023]
Further, the presser roll 5 functions to make the shape of the coil 6 uniform by pressing a portion of the formed coil 6 having a pitch of 10 pitches or more with an appropriate pressure.
[0024]
By configuring the manufacturing zone A in this way, it is not necessary to provide a spiral groove on the rotational shaping shaft 3, so it is easy to cope with changes in wire diameter and coil pitch, and dimensional stability and The synthetic resin coil 6 having good shape stability can be automatically manufactured.
[0025]
On the other hand, the coil cutting / dispensing zone B is disposed at an appropriate position of the rotational shaping shaft 3 and is arranged in parallel so as to face the detector 7 for detecting the rotational speed and the end of the rotational shaping shaft 3. A pair of rollers 8a and 8b that rotate in the same direction as the rotational shaping shaft 3 to convey the coil 6 discharged from the rotational shaping shaft 3 in the anti-rotation shaping shaft direction, and the pair of rollers A guide mechanism 9 that is arranged orthogonal to 8a and 8b and widens the pitch of the coil 6 to be conveyed, and a cutting edge 10a is inserted into the guide mechanism 9, and the coil 6 is interposed between the cutting edges 10a. A cutter 10 that is arranged with a widened portion of the coil 6 and operates when the rotational speed of the rotational shaping shaft 3 detected by the detector 7 reaches a predetermined numerical value, and cuts the widened portion of the coil 6. And a lower central portion between the pair of rollers 8a and 8b. Arranged and raised immediately after the operation of the cutter 10 to push the cut coil 6b upward from the pair of rollers 8a, 8b and displace it in parallel to the push-up plate 11 and the pair of rollers 8a, 8b, The cradle 12 is configured to receive the cutting coil 6b paid out by the push-up plate 11.
[0026]
According to the cutting / dispensing zone B having such a configuration, the continuously manufactured coil 6 can be cut to a desired length without stopping the manufacturing zone, and the cut coil 6b is automatically removed. Thus, the cutting coil 6b can be transferred to the storing or transporting process without causing entanglement or pitch irregularity, that is, without impairing the quality of the product coil.
[0027]
The pair of rollers 8a and 8b has the peripheral speed substantially equal to the peripheral speed of the outer diameter of the coil 6 discharged from the rotary shaping shaft 3, thereby allowing the coil 6 discharged from the rotary shaping shaft 3 to move. While being placed and rotated between the rollers 8a and 8b, it is conveyed in the counter-rotating shaping axis direction (arrow C direction).
[0028]
As shown in detail in FIG. 2, the guide mechanism 9 includes a pair of guide plates 9a and 9b arranged with a gap therebetween, and a coil insertion provided at the lower portion of one guide plate 9a located on the coil introduction side. A coil provided in the center of the hole 9c, a first inclined wall 9d provided in the lower part of the coil insertion hole 9c and inclined in the conveying direction of the coil 6, and the other guide plate 9b located on the coil lead-out side The lead-out hole 9e and a second inclined wall 9f provided at a lower part of the coil lead-out hole 9e so as to incline in the anti-carrying-out direction of the coil 6 and in the gap 9g between the pair of guide plates 9a and 9b. Thus, the coil 6 is configured to widen approximately one pitch.
[0029]
That is, the coil 6 introduced from the coil insertion hole 9c of one guide plate 9a first extends while being inclined upward along the first inclined wall 9d, and then inclined downward along the second inclined wall 9f. Since it extends and is led out from the coil lead-out hole 9e, it is caused by the opposite inclination angles of the first inclined wall 9d and the second inclined wall 9f in the gap 9g between the pair of guide plates 9a and 9b. Thus, as shown in the drawing, the width of about one pitch is widened.
[0030]
The cutter 10 is disposed so that the blade edge 10a is inserted into the gap 9g of the guide mechanism 9 and the widened portion 6a of the coil 6 is interposed between the blade edges 10a.
[0031]
Accordingly, since the widened portion 6a of the coil 6, that is, the monofilament 1 forming the coil 6, is always positioned between the cutting edges 10a of the cutter 10, the detector 7 has the rotational speed of the rotary shaping shaft 3 as described above. If a predetermined numerical value is detected and transmitted to the cutter 10 so as to close the cutting edge 10a of the cutter 10, the manufactured coil 6 can be cut to a preset length.
[0032]
In this case, it is preferable that the closing time at the time of cutting the coil of the cutter 10 is 0 to 0.5 seconds in order to efficiently drive the entire apparatus without causing the coil 6 to be twisted. It is a condition.
[0033]
The push-up plate 11 is disposed below the center portion between the pair of rollers 8a and 8b, and is lifted immediately after the cutter 10 is operated to push the cut coil 6b upward from the pair of rollers 8a and 8b. The action of paying out to the table 12 is performed.
[0034]
Then, the pair of rollers 8a and 8b and the push-up plate 11 are moved horizontally by 2 cm or more in the conveying direction of the coil 6 in synchronism with the cutting of the coil 6, and after returning the cut coil 6b, return to the original position. It is configured.
[0035]
That is, the pair of rollers 8a and 8b and the push-up plate 11 are mounted on, for example, a belt conveyor and can be moved horizontally and reversibly, and the push-up plate 11 can be raised and lowered via an air cylinder (not shown). .
[0036]
The cradle 12 is arranged in parallel with the pair of rollers 8a and 8b so that the cutting coil 6b paid out by the push-up plate 11 receives the cutting coil in an orderly manner without causing problems such as entanglement and uneven pitch. It has become.
[0037]
Next, the operation of the coil cutting / dispensing zone B will be described with reference to FIGS.
[0038]
First, FIG. 3A shows a state immediately before the cutting of the coil 6, and in this state, the coil 6 is placed on the pair of rollers 8a and 8b and is conveyed in the anti-rotation shaping axial direction while receiving rotation. At the same time, the guide mechanism 9 is always widened by about one pitch.
[0039]
And as shown in FIG.3 (b), the detector 7 detects the numerical value by which the rotation speed of the rotation shaping shaft 3 was prescribed | regulated previously, this is transmitted to the cutter 10, and the blade edge | tip 10a of the cutter 10 closes. As a result, the coil 6 is instantaneously cut by the widened portion 6a, and at the same time, the pair of rollers 8a and 8b and the push-up plate 11 are placed 2 cm in the conveying direction of the coil 6 (the direction of arrow A) while the cutting coil 6b is placed. Move horizontally.
[0040]
Next, as shown in FIG. 3 (c), the push-up plate 11 is raised, the cutting coil 6b is lifted from the pair of rollers 8a, 8b, and the cutting coil 6b is lifted up as shown in FIG. 3 (d). As described above, the weight is discharged from the push-up plate 11 to the cradle 12 (not shown) by its own weight.
[0041]
Next, as shown in FIG. 3 (e), the pair of rollers 8a and 8b and the push-up plate 11 return to their original positions and subsequently receive the continuously conveyed coil 6. In this case, the cutting coil Since 6b is paid out to the cradle 12 while maintaining the shape in the length direction, problems such as entanglement and uneven pitch do not occur.
[0042]
By using the synthetic resin coil automatic cutting and dispensing apparatus of the present invention having such a configuration, the wire diameter of the thermoplastic resin monofilament forming the coil is as large as 2.0 mm or more, and the outer diameter of the coil is 40 mm. Even in the case of a large diameter of up to 250 mm, the coil is automatically and accurately cut to a desired length without causing any troubles such as stopping the coil manufacturing apparatus, and the product quality of this cutting coil is hindered. It is possible to reliably pay out from the coil manufacturing apparatus without having to do this.
[0043]
【The invention's effect】
As described above, according to the automatic cutting / dispensing device for a synthetic resin coil of the present invention, the coil can be automatically and accurately cut to a desired length without stopping the coil manufacturing device, and the product quality can be reduced. If the wire diameter of the thermoplastic resin monofilament forming the coil is as large as 2.0 mm or more and the outer diameter of the coil is as large as 40 to 250 mm Even so, the above-mentioned cutting / dispensing can be reliably performed.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing an entire synthetic resin coil manufacturing apparatus including an automatic cutting and dispensing apparatus of the present invention.
FIG. 2 is a perspective explanatory view showing an example of a synthetic resin coil automatic cutting and dispensing apparatus of the present invention.
FIG. 3 is an explanatory perspective view showing a state immediately before cutting in the coil cutting-discharging process by the synthetic resin coil automatic cutting / dispensing device of the present invention.
FIG. 4 is an explanatory perspective view showing a cutting state of a coil cutting-discharging process by the synthetic resin automatic coil cutting / dispensing device of the present invention.
FIG. 5 is a perspective explanatory view showing a state after cutting in the coil cutting-discharging process by the synthetic resin automatic coil cutting / dispensing device of the present invention.
FIG. 6 is a perspective explanatory view showing a state of discharge in a coil cutting-discharging process by the synthetic resin coil automatic cutting / dispensing device of the present invention.
FIG. 7 is a perspective explanatory view showing a state where a coil cutting-discharging process is completed by the synthetic resin coil automatic cutting / discharging apparatus of the present invention.
FIG. 8 is a schematic plan view of a conventional synthetic resin coil manufacturing apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Monofilament 2 Preheating apparatus 3 Rotating shaping shaft 4 Guide guide 5 Presser roller 6 Coil 6a Widening part 6b Cutting coil 7 Speed detector 8a Roller 8b Roller 9 Guide mechanism 9a Guide plate 9b Guide plate 9c Coil insertion hole 9d Inclined wall 9e Coil outlet hole 9f Second inclined wall 9g Gap 10 Cutter 10a Cutting edge 11 Push-up plate 12 Receiving base

Claims (8)

In the apparatus for producing a coil made of synthetic resin by continuously winding a thermoplastic resin monofilament preheated to a temperature not lower than the glass transition temperature of the material resin and not higher than the melting point on a rotating shaping shaft and rapidly cooling it, the rotational shaping is performed. A device that automatically cuts and discharges a coil discharged from a shaft in a fixed length state,
A detector for detecting the rotational speed of the rotational shaping shaft;
A pair arranged parallel to the end of the rotational shaping shaft and rotating in the same direction as the rotational shaping shaft to convey the coil discharged from the rotational shaping shaft in the anti-rotation shaping axial direction. With Laura,
A guide mechanism that is arranged orthogonal to the pair of rollers and widens approximately one pitch of the coil being conveyed;
A blade edge is inserted into the guide mechanism, and the widened portion of the coil is interposed between the blade edges, and the rotational speed of the rotational shaping shaft detected by the detector reaches a predetermined numerical value. A cutter that operates at the time of cutting the widened portion of the coil and a lower central portion between the rollers of the pair of rollers, and rises immediately after the operation of the cutter, and the cut coil is moved to the pair of rollers A push-up plate that pushes upward from the
An automatic cutting / dispensing device for a synthetic resin coil, comprising: a receiving base that is arranged in parallel with the pair of rollers and receives a coil that has been delivered by the push-up plate. 2. The synthetic resin coil automatic cutting / dispensing device according to claim 1, wherein the peripheral speed of the pair of rollers is the same as the peripheral speed of the outer diameter of the coil discharged from the rotary shaping shaft. The guide mechanism includes a pair of guide plates arranged with a gap, a coil insertion hole provided in a lower portion of one guide plate located on the coil introduction side, and the conveyance of the coil to the lower portion of the coil insertion hole. A first inclined wall provided inclined in the direction, a coil outlet hole provided in the center of the other guide plate located on the coil outlet side, and a lower portion of the coil outlet hole in the anti-carrying-out direction of the coil The second inclined wall provided with an inclination, and is configured to widen approximately one pitch of the coil within the gap between the pair of guide plates. An automatic cutting and dispensing device for synthetic resin coils as described in 1. The pair of rollers and the push-up plate move horizontally by 2 cm or more in the coil conveying direction in synchronization with the cutting of the coil, and return to the original position after discharging the cut coil. 4. An automatic cutting / dispensing device for a synthetic resin coil according to any one of 3 above. The automatic cutting / dispensing device for a synthetic resin coil according to any one of claims 1 to 4, wherein a closing time of the cutter blade at the time of coil cutting is 0 to 0.5 seconds. The synthetic resin coil automatic cutting and dispensing device according to any one of claims 1 to 5, wherein the push-up plate is movable up and down via an air cylinder. The apparatus for automatically cutting and discharging a synthetic resin coil according to any one of claims 1 to 6, wherein a diameter of a thermoplastic resin monofilament forming the coil is 2.0 mm or more. The automatic cutting / dispensing device for a synthetic resin coil according to any one of claims 1 to 7, wherein an outer diameter of the coil is 40 to 250 mm.

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