JP2007175811A - Perforating method and perforating device for foam molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a perforating method, efficiently and suitably forming a through hole in an easily deformable foam molding and a perforating device for a foam molding, suitably implementing the perforating method. <P>SOLUTION: A plurality of foam moldings 10 presenting a plate-like shape are aligned in parallel, and a punching tool 22 is caused to rush in and penetrate at a required speed sequentially from one side of these foam moldings 10. At this time, broken and separated unnecessary discard material 14 from each foam molding 10 is sequentially stored in a tip recessed part 36 provided at the tip of the punching tool 22. When the punching tool 22 penetrates all of the foam moldings 10 so that the tip is projected to the other side, the unnecessary discard material 14 stored in the tip recessed part is removed from the other side using sucking air of a removing mechanism. Prior to rush-in of the punching tool 22, the aligned foam moldings 10 are respectively compressed from the same direction as the rush-in direction of the punching tool 22 in the range of 3 to 5%. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a foam molding method and a hole molding apparatus for a foam molded body, and more specifically, a plurality of foam molded bodies having a plate shape are aligned in parallel and from one side to the foam molded body. A hole forming method for a foamed molded body in which a through hole having the same shape as the end face shape of the punched tool is formed in each foamed molded body by sequentially penetrating the punched tool, and a hole for carrying out this hole forming method The present invention relates to a molding apparatus.

In FIG. 13, for example, a circular through-hole 12 formed in a plate shape with a thickness of D = 5 mm from a flexible polyurethane foam resin having a density of 20 to 50 kg / m ³ and penetrating in the thickness direction is formed at a predetermined position. The foam molded body 10 is illustrated. Such a foam molded body 10 is (1) batch molded using a foam molding die provided with a cavity having the same shape as the foam molded body 10 and (2) a flexible polyurethane foamed resin foam molded into a large block shape. A block can be sliced, cut into the thickness described above, and molded by a molding method such as drilling the through-hole 12 in the secondary processing.

  In the above-described forming method (2), for example, the method and apparatus disclosed in Patent Document 1 can be used for forming the through-hole 12 as the secondary processing. That is, the apparatus is arranged on the production line of the foam molded body 10, the foam molded bodies 10 preformed into a plate shape in the previous process are sequentially supplied to the apparatus one by one, and punching of Thomson blades and the like equipped in the apparatus is performed. By penetrating and punching (punching) the tool, the aforementioned through-hole 12 having the same shape as the end face shape of the punching tool is formed.

Here, when the through hole 12 is formed by penetrating / penetrating a punching tool, unnecessary waste 14 (so-called “cass”) having the same shape as the through hole 12 is generated. Removal is a challenge. Therefore, in the apparatus disclosed in Patent Document 1, the unnecessary waste 14 is sucked and removed by a suction device (dust collector) connected to the piping duct.
JP 2000-326295 A

  However, in the apparatus disclosed in Patent Document 1 and the hole forming method using this apparatus, the through-holes 12 are sequentially formed for each one of the preformed foamed molded bodies 10, and the hole forming operation is performed. Must be synchronized with the line speed, and it is pointed out that the molding efficiency cannot be improved. Moreover, since it is necessary to equip both an air suction apparatus and a compressed air ejection apparatus in order to remove the unnecessary waste material 14, in order to install these apparatuses in-line, huge installation expense is needed, and it originates in this. As a result, there are problems such as increased molding costs. In addition, the unnecessary waste 14 is clogged inside the punching tool or remains stuck in the through-hole 12 formed in the foamed molded body 10, so that the apparatus is stopped and removed manually. Inconveniences such as reduction in molding work efficiency and inadvertent damage to the foamed molded product 10 have also occurred.

  Further, in Patent Document 1 described above, a specific technique for forming a through-hole 12 by penetrating / penetrating a punching tool into a work (foamed molded body 10) that has low rigidity and is easily deformed by external force (easily crushed). The content is hardly disclosed. That is, in the case of the foam molded body 10 that is easily deformed by an external force, when the punching tool is simply pressed to enter, the foam molded body 10 is deformed so as to be crushed or twisted. In many cases, it was difficult to form the material.

  Accordingly, the present invention provides a hole forming method in which a through hole is efficiently and appropriately formed in a foam molded body that is easily deformed, and a hole forming apparatus for suitably carrying out this hole forming method. With the goal.

In order to solve the above problems and achieve the intended purpose, the invention according to claim 1 of the present application provides:
By aligning a plurality of foam-molded bodies having a plate shape in parallel and sequentially passing through the punching tool from one side to the foam-molded body, a through hole having the same shape as the end face shape of the punching tool is formed. A method for forming a hole in a foamed molded product to be molded into each foamed molded product,
The punching tool is sequentially penetrated from one side of each foamed molded article at a required speed, and unnecessary waste material that breaks and separates from the foamed molded article at this time is opened at the tip of the punching tool. Sequentially housed in the recesses,
When the punching tool penetrates all the foamed molded bodies and the tip is pulled out to the other side, the grit is to remove the unnecessary waste contained in the tip recessed portion to the other side by the removing means. To do.

  Therefore, according to the first aspect of the present invention, through holes can be formed in a plurality of foam molded bodies by a single hole forming step, so that the efficiency of hole forming work can be improved and the work cost can be reduced. It becomes.

According to a second aspect of the present invention, in the first aspect of the present invention, prior to the entry of the punching tool, each of the foamed molded products aligned is 3 to 5% from the same direction as the direction of the punching tool. The gist is to compress within the range.
Therefore, according to the invention which concerns on Claim 2, a deformation | transformation, a twist, etc. of a foaming molding can be prevented, and it is possible to shape | mold a through-hole appropriately with a punching tool.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the piercing speed of the punching tool with respect to each foamed molded product has a maximum value of 1. While accelerating to 5 to 2.0 m / s and entering the distance of 3/4 to 1/2 of the penetration length including the intermediate point of the penetration length, the speed is constant, and between entering the remaining distance The gist is to decelerate to stop when the penetration is completed.
Therefore, according to the invention which concerns on Claim 3, when a punching tool plunges with respect to a foaming molding, when a rushing is progressing, and when the punching tool penetrates from a foaming molding, foaming is carried out, respectively. The deformation of the molded body can be prevented, and the through hole can be formed appropriately.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the removal of unnecessary waste by the removing means uses suction air.
Therefore, according to the invention which concerns on Claim 4, the unnecessary waste which was accommodated in the front-end | tip recessed part of a punching tool can be removed appropriately, and this unnecessary discard is carried out in this punching tool and the through-hole of a foaming molding. The inconvenience that a thing remains can be avoided suitably.

The invention according to claim 5 of the present application is
By aligning a plurality of foam-molded bodies having a plate shape in parallel and sequentially passing through the punching tool from one side to the foam-molded body, a through hole having the same shape as the end face shape of the punching tool is formed. A foam molding device for molding a foam molded body to be molded into each foam molded body,
Compression means for compressing the aligned foamed molded bodies from the same direction as the direction of entry of the punching tool;
A tip recess that is provided at the tip of the punching tool and can temporarily store unnecessary waste that is broken and separated from each foamed molded article;
Provided on the opposite side of the punching tool across the aligned foamed molded body, and when the punching tool penetrates all the foamed molded body and exits to the other side, it is accommodated in the tip recess. And removing means for removing unnecessary waste.

  Therefore, according to the fifth aspect of the present invention, through holes can be formed in a plurality of foamed molded bodies by a single hole forming step, so that the efficiency of the hole forming operation can be improved and the operation cost can be reduced. Make it possible.

According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the compression means includes a pressure plate provided on both sides of the foamed molded body, and the pressure plate moved toward or away from each other. The gist of the present invention is that it is composed of a drive unit to obtain.
Therefore, according to the sixth aspect of the present invention, the aligned foamed molded products can be appropriately compressed, deformation and twisting of the foamed molded product can be prevented at the time of hole forming processing, and the through holes can be appropriately formed. It can be molded.

The gist of the invention according to claim 7 is that, in the invention according to claim 5 or 6, the tip recess has an inclined surface that expands toward the tip of the punching tool at an inclination angle.
Therefore, according to the invention which concerns on Claim 7, the accommodated unnecessary waste can be accommodated sequentially in the state compressed appropriately.

The gist of the invention according to claim 8 is that, in the invention according to claim 7, the inclination angle of the inclined surface is set to 40 to 50 degrees with respect to the axis of the punching tool.
Therefore, according to the invention which concerns on Claim 8, while accommodated the unnecessary waste contained, it can accommodate sequentially in the state compressed appropriately, and it can remove appropriately by a removal means.

The invention according to claim 9 is the invention according to any one of claims 5 to 8, wherein the removing means is connected to a duct having an opening capable of taking in the unnecessary waste, and the duct. The gist is that it is composed of an air suction part.
Therefore, according to the invention which concerns on Claim 9, the unnecessary waste material accommodated in the front-end | tip recessed part can be suitably removed using the attraction | suction force of air.

According to the method for forming a hole in a foamed molded product according to the present invention, it is possible to efficiently and appropriately form a through-hole in a foamed molded product that is easily deformed.
Further, according to the hole forming apparatus for a foam molded body according to the present invention, it is possible to suitably carry out a hole forming method for efficiently and appropriately forming a through-hole in a foam molded body that is easily deformed.

  Next, a foam molding method and a hole molding apparatus according to the present invention will be described below with reference to the accompanying drawings by giving preferred examples.

  First, a hole forming apparatus capable of carrying out a hole forming method of this embodiment to be described later will be described with reference to the drawings. FIG. 2 is a plan view and a front view schematically showing a hole forming apparatus for carrying out a hole forming method of this embodiment to be described later, and FIG. 3 is a side view schematically showing the hole forming apparatus. For convenience of explanation, in FIG. 2A, the longitudinal direction of the hole forming apparatus is the left-right direction of the hole forming apparatus, and the short direction is the front-back direction of the hole forming apparatus.

  The hole forming apparatus 20 of the present embodiment, for example, aligns a plurality of (for example, about 30) foam molded bodies 10 illustrated in FIG. 13 in parallel, that is, foam molded bodies 10 formed from a foam material and exhibiting a plate shape. At the same time, two punching tools 22 and 22 are sequentially penetrated from one side in the thickness direction with respect to the foamed molded body 10 so that two end faces having the same shape as the end face shape of the punching tools 22 and 22 are formed. The through holes 12 and 12 can be simultaneously molded into each foamed molded body 10. In other words, the through-holes 12 can be simultaneously formed in the plurality of foam molded bodies 10 by reciprocating the punching tool 22 once.

  Specifically, the hole forming apparatus 20 of this embodiment is aligned with a punching tool 22 for forming the through-hole 12 in the foamed molded body 10 and a blade driving mechanism 24 for reciprocating the punching tool 22. A compression mechanism (compression means) 26 for compressing each foamed molded body 10, and a removal mechanism (removal means) 28 for removing unnecessary waste 14 accommodated in a later-described distal-end recessed portion 36 provided at the distal end of the punching tool 22; It has. That is, the hole forming apparatus 20 is characterized in that the unnecessary waste 14 generated when the through holes 12 are formed is removed each time during the processing step. The blade driving mechanism 24, the compression mechanism 26, and the removal mechanism 28 described above are disposed in a subframe 32 that is attached in an inclined manner on a main frame 30 configured in a frame shape.

  As illustrated in FIGS. 4 and 5, the punching tool 22 of this embodiment has a so-called “Thomson blade” shape that has been widely used in the past, and forms a round hole-shaped through-hole 12. Therefore, the blade body 34 has a cylindrical shape, and is detachably mounted on the tip of the stay 48 in the blade drive mechanism 24 using a bolt or the like. And the front-end | tip part of the cutting tool main body 34 is formed with the front-end | tip recessed part 36 comprised by the mortar-shaped inclined surface 38 which expands with the inclination angle toward the front surface of the punching tool 22, Thereby, the outer edge ridgeline of a front-end | tip part The portion is a ring-shaped blade portion 40.

  When the punching tool 22 is penetrated from one side of the foam molded body 10 at a required speed, the tip recessed portion 36 is not crushed after being broken and separated from the foam molded body 10. It functions to accommodate and hold the waste 14 temporarily, and has a volume sufficient to accommodate all unnecessary waste 14 generated from each foamed molded body 10 in a crushed state. As illustrated in FIG. 5, the inclination angle of the inclined surface 38, that is, the inclination angle R with respect to the axis of the punching tool 22 is set within a range of 40 to 50 °. Such a punching tool 22 applies a shearing force to the foamed molded body 10 at the blade portion 40 described above when penetrating the foamed molded body 10, thereby unnecessary waste having the same contour shape as the blade portion 40. The through holes 12 can be formed in the foam molded body 10 by breaking and separating 14.

  In addition, the punching tool 22 mentioned above does not need to be equipped with the blade as a cutter, and the blade part 40 mentioned above does not need to be a sharp pointed shape. That is, the outer peripheral edge shape of the tip may be such that the foam molded body 10 can be pushed out while the foam molded body 10 is pressed. In other words, it is important that the tip recess 36 is formed at the tip of the blade body 34 so that the unnecessary waste 14 can be accommodated in the tip recess 36.

  As illustrated in FIGS. 2 and 3, the blade driving mechanism 24 is disposed on the right side of the front surface of the subframe 32, and is supported so as to be slidable back and forth along the horizontal guide bars 42 and 42. A plate 44 and a first fluid actuator 46 attached to the lower center of the subframe 32 and having a tip of a rod 46A connected to the support plate 44 and fixed to the support plate 44 in a state of extending horizontally, the tip And stays 48, 48 adapted to be fitted with a punching tool 22. The first fluid actuator 46 uses oil, air, or the like as a working medium. By controlling the rod 46A to move forward or backward, the support plate 44 described above is reciprocated along the guide bars 42, 42. .

  For example, when the first fluid actuator 46 is controlled so that the rod 46A moves forward, the support plate 44 and the stays 48, 48 move to the right in the figure as illustrated in FIG. 2 or FIG. 7C. As a result, the punching tools 22 and 22 attached to the tips of the stays 48 and 48 are retracted from a set portion 50 described later. Further, when the first fluid actuator 46 is controlled so that the rod 46A moves backward, the support plate 44 and the stays 48, 48 are moved in the left direction in the figure as illustrated in FIGS. 7 (a) and 7 (b). The punching tools 22 and 22 attached to the tips of the stays 48 and 48 extend to the set portion 50 by moving. The first fluid actuator 46 can variably control the forward / backward speed of the rod 46A by a control device (not shown). Thereby, adjustment (acceleration / deceleration) of the rush speed of the punching tools 22 and 22 with respect to the foaming molding 10 is possible.

  At the center of the left and right of the subframe 32, as illustrated in FIGS. 2 and 3, etc., a set portion 50 is provided for setting a plurality of foamed molded products 10 in a state of being aligned in a side-by-side arrangement. The set unit 50 includes a mounting plate 52 for mounting each foamed molded body 10, a back plate 54 erected on the rear side of the mounting plate 52, and a erection on the right side of the mounting plate 52. The side plate (clamping plate) 56 and a hollow body-like moving body 58 disposed on the left side of the upper surface of the mounting plate 52 are configured. The moving body 58 includes a pressing portion (clamping plate) 60 for clamping the foamed molded body 10 and constitutes the compression mechanism 26. As will be described later, the moving body 58 is horizontally moved on the mounting plate 52. Slide movement is possible. The side plate 56 is formed with openings 56A and 56A at positions corresponding to the above-described stays 48 and 48, so that the punching tools 22 and 22 can be accommodated and the stays 48 and 48 can be inserted. ing.

  As illustrated in FIG. 2 and FIG. 3 and the like, the compression mechanism 26 includes the above-described side plate 56 erected on the right side of the set unit 50 and the above-described side plate 56 provided on the moving body 58 on the side facing the side plate 56. The clamping unit 60 includes a second fluid actuator 62 that is attached to the left side of the front surface of the sub frame 32 and has a tip of a rod 62 </ b> A coupled to the moving body 58. The second fluid actuator 62 uses oil, air, or the like as a working medium, and reciprocates the moving body 58 left and right by controlling the rod 62A to move forward or backward, so that the pressing portion is pressed against the side plate 56. Move 60 close or away.

  For example, when the second fluid actuator 62 is controlled so that the rod 62A moves forward, as illustrated in FIG. 7C, the moving body 58 moves to the right in the figure and moves relative to the side plate 56. Thus, the clamping unit 60 is moved in proximity. Further, when the second fluid actuator 62 is controlled so that the rod 62A moves backward, as illustrated in FIG. 6B, the moving body 58 moves to the left in the figure and moves relative to the side plate 56. Thus, the clamping unit 60 is moved away. That is, the compression mechanism 26 compresses each foamed molded body 10 aligned in parallel to the set portion 50 in the same direction as the direction in which the punching tools 22 and 22 enter, in other words, compresses the foamed molded body 10 from the thickness direction. Function.

  The removal mechanism 28 is provided on the opposite side of the punching tools 22 and 22 across the set portion 50 that aligns the foam molded bodies 10 in parallel, and has a duct 64 having an opening 64A that can take in unnecessary waste 14. The intake device (air suction part) 66 is connected to the duct 64. As illustrated in FIGS. 2 and 3, the duct 64 is connected to the moving body 58 in a state where the opening 64 </ b> A is aligned with the opening connecting portion 58 </ b> A provided on the outer wall surface of the moving body 58. It has a hopper shape that expands as it approaches. In addition, the pinching portion 60 is formed with intake ports 68 and 68 of a shape and size that allow the punching tools 22 and 22 to be inserted into portions corresponding to the punching tools 22 and 22 mounted on the stays 48 and 48 described above. Has been. As a result, when the intake device 66 is operated, air is introduced into the moving body 58 through the intake ports 68, 68 and then sucked from the opening 64A through the duct 64 to the intake device 66 side. become. Accordingly, as illustrated in FIG. 7B and FIG. 9 and the like, the punching tools 22 and 22 that have passed through all the foamed molded bodies 10 and have come out to the other side face the corresponding intake ports 68 and 68. Therefore, by operating the air intake device 66 in the air suction state, the unnecessary waste 14 accommodated in the tip recessed portion 36 is brought into the duct 64 by the suction force of the air introduced from the air intake ports 68 and 68. Be sucked into.

(Hole forming method)
Next, a method for forming a foamed molded body according to the present embodiment using the hole forming apparatus 20 configured as described above will be described with reference to FIGS. 1 and 6 to 9.

  The hole forming method for the foam molded body according to the present embodiment uses the hole forming apparatus 20 having the above-described configuration to align in parallel a plurality of foam molded bodies 10 formed of a foam material and exhibiting a plate shape. In this method, the punching tool 22 is sequentially penetrated from one side of the foamed molded body 10 to form the through holes 12 having the same shape as the end face shape of the punched tool 22 in each foamed molded body 10. . That is, it is a method of forming the through-hole 12 penetrating in the thickness direction of the plate-like foamed molded body 10 having appropriate elasticity and a relatively small thickness.

  In the hole forming method of this embodiment, as schematically illustrated in FIG. 1, the compression process of each foamed molded body 10 performed using the compression mechanism 26, the punching tool 22, and the blade tool driving mechanism. Mainly includes a hole forming process performed by using 24 and a removal process performed by using the removal mechanism 28. It should be noted that when the hole forming method is carried out, the initial state of the hole forming apparatus 20 (the state before forming) is such that the first fluid actuator 46 of the blade drive mechanism 24 is stopped and held in a state in which the rod 46A has advanced, and the compression mechanism 26 The second fluid actuator 62 is stopped and held with the rod 62A retracted.

  Therefore, in the compression step, as illustrated in FIG. 6A, the rod 62A of the second fluid actuator 62 of the compression mechanism 26 is retracted to increase the distance between the side plate 56 and the pressing portion 60. The foam molded bodies 10 are sequentially set side by side on the mounting plate 52 of the setting unit 50. Then, each foam molded body 10 is pressed against the back plate 54 and pressed against the side plate 56 to be aligned, and the second fluid actuator 62 is driven and controlled so that the rod 62A moves forward. Accordingly, as illustrated in FIG. 6B, the moving body 58 moves to the right in the drawing so as to be close to the side plate 56, and the sandwiching portion 60 and the side plate 56 of the moving body 58 The aligned foamed molded products 10 are appropriately compressed from the thickness direction, that is, the same direction as the direction in which the punching tool 22 enters.

  Here, the compression rate of each foamed molded body 10 by the compression mechanism 26 is desirably set in a range of 3 to 5% in the thickness direction, which is the penetration direction of the punching tool 22. In other words, the total thickness DA2 of all the foam molded bodies 10 after compression is compressed to 95 to 97% of the total thickness DA1 of all the foam molded bodies 10 before compression. This is because, when the punching tools 22 and 22 enter and penetrate the foamed molded body 10 having elasticity, (1) the foamed molded body 10 is inadvertently deformed or twisted due to the pressing of the punching tool 22. It is a numerical value determined from the viewpoint of preventing (2) the shearing force from being appropriately applied to the foam molded body 10 by the punching tool 22. Note that, based on the physical properties, thickness, and the like of the foam molded body 10, it is desirable to reduce the compression rate when the foam molded body 10 is hard, and increase the compression rate when the foam molded body 10 is soft.

  Prior to the hole forming step, when the compression operation for the respective foam molded bodies 10 is completed by the compression mechanism 26, the rod 46A moves back the first fluid actuator 46 of the blade drive mechanism 24 as illustrated in FIG. 7A. Thus, the punching tools 22 and 22 are sequentially inserted from one side (from the right side in FIG. 7A) at the required speed and penetrated. Then, as illustrated in FIGS. 8A to 8C, the unnecessary waste 14 generated by breaking and separating from the foam molded body 10 when penetrating each foam molded body 10 is replaced with the punching tools 22, 22. Are sequentially accommodated in the tip recess 36 opened at the tip of the lip. At this time, each unnecessary waste 14 is pushed from the foamed molded body 10 in which the through-hole 12 is not formed as the punching tool 22 moves forward, so that it is sequentially pushed into the tip recess 36 and reduced. It will be stacked.

  Here, in the hole forming method according to the present embodiment, when each of the plurality of foam molded bodies 10 aligned in parallel is regarded as a single foam molded body 10 having a thickness DA2, punching of the foam molded body 10 is performed. The entry speed of the tool 22 is changed from acceleration → constant speed → deceleration in the penetration length (thickness DA2 in the compressed state) from the start of entry to the completion of penetration. Specifically, as shown in FIG. 12, the rush speed is accelerated so that the maximum value becomes 1.5 to 2.0 m / s during the rush from the rush start point to the required distance S1 (acceleration region), The distance S2 that is 3/4 to 1/2 of the penetration length including the middle point of the penetration length (thickness DA2) is constant speed (constant speed region), while the remaining distance S3 is penetrated. It is set to decelerate from 1.5 to 2.0 m / s (deceleration region) so as to stop when completed, and to temporarily stop (final speed = zero) immediately after completion of penetration. However, the speed change in the acceleration region and the deceleration region is (1) linearly changing to accelerate or decelerate (FIG. 12), (2) curve changing to accelerate or decelerate, (3) stepwise Various patterns can be set, such as acceleration or deceleration by changing.

  In addition, when the maximum value of the rush speed in the acceleration region is 1.5 m / s or less, the shearing force is not appropriately expressed with respect to the foam molded body 10, and the foam molded body 10 is in the rush site of the punching tool 22. There arises a disadvantage that it is deformed so as to be crushed in a concave manner. In addition, when the maximum value of the rush speed in the acceleration region is 2.0 m / s or more, the shearing force by the punching tool 22 does not act smoothly, and the foamed molded body 10 is torn or torn, and the through-hole 12 The inconvenience that the inside of is not clean occurs.

  The distance S2 of the constant speed region is set in the range of 3/4 to 1/2 of the penetration length including the midpoint of the penetration length (thickness DA2 in the compressed state) as described above and illustrated in FIG. It is desirable to do. When the distance S2 of the constant speed region is set to be longer than 3/4 of the penetration length, the acceleration region and the deceleration region are shortened. Therefore, in the acceleration region, the maximum value (1.5 to 2.0 m described above) is used. / S), the rush speed cannot be sufficiently accelerated, and in the deceleration region, it cannot be sufficiently decelerated and cannot be stopped when the penetration is completed. The rush speed in the constant speed region may be constant and does not need to be fixed at 1.5 to 2.0 m / s. Preferably, 1.5 to 2.0 m / s times 1.5 to 2.0 m, that is, about 3.0 to 4.0 m / s is effective from the viewpoint of shortening the molding cycle time. is there.

  Further, in the deceleration area, as described above, when the transition from the constant speed area to the deceleration area occurs, the entry speed of the punching tool 22 is reduced to 1.5 to 2.0 m / s, and the speed is gradually reduced from this entry speed. Is desirable. This is because the through hole 12 can be appropriately punched to the final foamed molded body 10 by reducing the speed at the time of completion of the penetration, and the punching tool 22 can be stopped appropriately when the penetration is completed. This is because it is possible to increase the removal efficiency of the unnecessary waste 14 using air.

  Then, at an appropriate time when the hole forming process for each foamed molded body 10 is progressing due to the entry of the punching tool 22, as illustrated in FIGS. 7A and 9A, the air intake device 66 of the removal mechanism 28 is used. Is controlled to be in an intake state. As a result, as shown in FIGS. 7 (b) and 9 (b), when the punching tools 22, 22 penetrate all the foamed molded bodies 10 and the tips are pulled out to the other side, the tips Each unnecessary waste 14 accommodated in the recessed portion 36 is sucked into the moving body 58 from the intake port 68 together with the suction air. In particular, since the punching tool 22 penetrating each foamed molded body 10 is temporarily stopped at the time of the penetration, the unnecessary waste 14 accommodated in the tip recess 36 is efficiently removed.

  Since the unnecessary wastes 14 that have been separated from each foamed molded body 10 by being broken and separated are stacked in a state of being crushed into the tip recesses 36, one by one is separated as illustrated in FIG. 9C. However, it returns to its original shape and is removed by suction. Then, as shown in FIG. 7B, each unnecessary waste 14 sucked together with the suction air sequentially moves into the duct 64 through the opening 64A, and then collects unnecessary waste (not shown). It is collected in the department.

  When all unnecessary waste 14 is removed from the tip recess 36 by the removal mechanism 28, the first fluid actuator 46 of the blade drive mechanism 24 is driven so that the rod 46A moves forward as illustrated in FIG. 7C. The punching tools 22 and 22 are sequentially withdrawn from the respective foam molded bodies 10 by controlling. Thereby, round foam-like through-holes 12 and 12 penetrating in the thickness direction are formed in the respective foam molded bodies 10 at portions where the respective punching tools 22 and 22 have passed.

  When the punching tools 22 and 22 are retracted, although not shown, the second fluid actuator 62 of the compression mechanism 26 is driven and controlled so that the rod 62A moves backward to move the moving body 58 away from the side plate 56, The compression state with respect to the foaming molding 10 is cancelled | released. And the molding process of the through-holes 12 and 12 with respect to these foaming moldings 10 is complete | finished by taking out each foaming molding 10 from the set part 50. FIG.

  According to the hole forming method for a foamed molded product according to this example, the following operational effects are obtained. That is, since a plurality of plate-like foam molded bodies 10 having elasticity are aligned in parallel, and the punching tool 22 is made to penetrate and penetrate these foam molded bodies 10, a single hole forming process is performed. The through-holes 12 can be formed in the plurality of foamed molded products 10, so that the efficiency of the hole forming operation can be improved and the operation cost can be reduced. Prior to the molding of the through-hole 12, each foamed molded body 10 is moderately compressed by 3 to 5% in the same direction as the punching / penetrating direction of the punching tool 22, so that the foamed molded body 10 is deformed or twisted. Therefore, the through hole 12 can be appropriately formed. Moreover, since the rushing speed of the punching tool 22 is set to be accelerated at the start of rushing, to be constant at the middle and to be decelerated when the penetration is completed, the through holes 12 are appropriately formed for all the foam molded bodies 10. It becomes possible to mold. Further, since the unnecessary waste 14 accommodated in the tip recessed portion 36 of the punching tool 22 is removed by using the air sucked by the suction device 66, the inside of the punching tool 22 and the passage of the foam molded body 10 are removed. The inconvenience that the unnecessary waste 14 remains in the hole 12 can be preferably avoided, the molding work efficiency can be improved, and the foamed molded product 10 is not inadvertently damaged.

  Moreover, according to the hole molding apparatus 20 of the foaming molding which concerns on a present Example, there exist the following effects. That is, since a plurality of plate-like foam molded bodies 10 having elasticity can be arranged in parallel, the punching tool 22 can be pierced / penetrated into these foam molded bodies 10, so that one hole is formed. It is possible to form the through-holes 12 in the plurality of foamed molded products 10 by the molding process, thereby improving the efficiency of the hole forming operation and reducing the operation cost. Since the compression mechanism 26 is provided, the foamed molded bodies 10 aligned can be appropriately compressed 3 to 5% in the same direction as the piercing / penetrating direction of the punching tool 22 prior to the molding of the through holes 12. It is possible to prevent the foamed molded body 10 from being deformed or twisted during the molding process, and the through hole 12 can be appropriately molded. Moreover, since the rush speed of the punching tool 22 can be changed, the speed at the start of rush, at the time of rush advancement, and at the completion of penetration can be changed. The through hole 12 can be formed.

  Furthermore, by providing the tip recess 36 at the tip of the punching tool 22, the unnecessary waste 14 that has been broken and separated from the foam molded article 10 can be temporarily stored in a properly compressed state. . Moreover, since the tip recess 36 is formed in a mortar shape having an inclined surface 38, the unnecessary waste 14 accommodated can be appropriately removed by utilizing the air suction force by the removal mechanism 28. Since the unnecessary waste 14 can be removed when the punching tool 22 penetrates the foam molded body 10, the unnecessary waste 14 remains in the punching tool 22 or in the through hole 12 of the foam molded body 10. Can prevent inconvenience.

  In the above-described embodiment, the punching tool 22 having a round bar shape is illustrated in order to form the round hole-shaped through-hole 12 in the foamed molded body 10, but the punching tool 22 is not limited to this. For example, it may be a rectangular shape illustrated in FIGS. 10 and 11. This punching tool 22 is for forming a rectangular hole-shaped through-hole in the foamed molded body 10, and is provided with a tip recess 36 having an inclined surface 38 at its tip, and an outer edge ridge line portion at the tip. A blade portion 40 is formed on the top. Even with such a punching tool 22, unnecessary waste 14 formed by molding the through holes 12 in each foamed molded body 10 can be temporarily stored in the tip recess 36, and It is possible to appropriately remove the unnecessary waste 14 accommodated in the tip recess 36 by using the suction air by the removing mechanism 28.

  Further, the blade drive mechanism 24, the compression mechanism 26, and the removal mechanism 28 are not limited to the embodiment described above. For example, instead of the first fluid actuator 46 and the second fluid actuator 62 that are the drive sources of the blade drive mechanism 24 and the compression mechanism 26, various motors, electromagnetic solenoids, or other various drive means can be employed. .

  The hole forming method and the hole forming apparatus for a foamed molded product according to the present invention align a plurality of plate-shaped foamed molded products in parallel, and sequentially penetrate the punching tool from one side with respect to the foamed molded product. A hole forming method for a foam molded body for forming a through hole having the same shape as the end face shape of the punching tool in each foam molded body, and a hole forming apparatus for carrying out this hole forming method. For example, it can be suitably carried out for forming a foamed molded product that is used as a gasket or seal member used in various apparatuses.

The schematic process drawing of the hole forming method of a present Example. (a) is the IIa-IIa sectional view taken on the line of FIG. 3, (b) is the IIb-IIb sectional view taken on the line of FIG. The side view which illustrated schematically the hole forming apparatus which enforces the hole forming method of a present Example. The schematic perspective view of a punching tool. The partially broken side view of the punching tool illustrated in FIG. Explanatory drawing which showed the compression process in the hole forming method. Explanatory drawing which showed the hole shaping | molding process and the removal process of unnecessary waste in a hole shaping | molding method. Explanatory sectional drawing which showed the state at the time of the rush start of the punching tool in a hole forming process. Explanatory sectional drawing which showed the state at the time of the penetration completion of the punching tool in a hole forming process. The schematic perspective view of the punching tool of another form. The partially broken top view of the punching tool illustrated in FIG. The graph which showed the change of the rush speed of the punching tool with respect to a foaming molding. Explanatory drawing of the state which shape | molds a through-hole in the foaming molding which exhibits plate shape.

Explanation of symbols

10 foam moldings, 12 through holes, 14 unnecessary waste, 22 punching tools,
26 compression mechanism (compression means), 28 removal mechanism (removal means), 36 tip recess,
38 inclined surfaces, 56 side plates (clamping plate), 60 clamping units (clamping plate),
62 second fluid actuator (drive unit), 64 duct, 66 air intake device (air suction unit),
R Inclination angle

Claims (9)

A plurality of foam molded bodies (10) exhibiting a plate shape are aligned in parallel, and the punching tool (22) is sequentially penetrated from one side to the foam molded body (10), whereby the punching tool (22 ) Through-holes (12) having the same shape as the end face shape of the foam-molded body (10).
The punching tool (22) is sequentially penetrated from one side of each foamed molded body (10) at a required speed, and at this time, unnecessary wastes (14) broken and separated from the foamed molded body (10). ) Are sequentially accommodated in the tip recess (36) opened at the tip of the punching tool (22),
When the punching tool (22) has penetrated all the foamed molded bodies (10) and the tip has come out to the other side, the unnecessary waste (14) contained in the tip recess (36) is removed. A method for forming a hole in a foam-molded product, characterized in that the other side is removed by means (28).   Prior to the entry of the punching tool (22), the aligned foamed molded bodies (10) are compressed within a range of 3 to 5% from the same direction as the entry direction of the punching tool (22). A method for forming a hole in a foam molded article.   The piercing speed of the punching tool (22) with respect to each foamed molded body (10) is accelerated so that the maximum value becomes 1.5 to 2.0 m / s while piercing from the rush start point to the required distance. 2. The vehicle is decelerated so as to stop at the point of time when the penetration is completed while entering the distance of 3/4 to 1/2 of the penetration length including the intermediate point of the long length and entering the remaining distance. 3. A method for forming a hole in a foamed molded article according to 2.   The method of forming a hole in a foamed molded product according to any one of claims 1 to 3, wherein the removal of the unnecessary waste (14) by the removing means (28) uses suction air. A plurality of foam molded bodies (10) exhibiting a plate shape are aligned in parallel, and the punching tool (22) is sequentially penetrated from one side to the foam molded body (10), whereby the punching tool (22 ) Is a hole forming device for a foam molded body that molds the through holes (12) having the same shape as the end face shape of each foam molded body (10),
Compression means (26) for compressing the aligned foamed molded bodies (10) from the same direction as the direction of entry of the punching tool (22),
A tip recess (36) provided at the tip of the punching tool (22) and capable of temporarily storing unnecessary waste (14) separated from each foamed molded body (10) by breakage;
Provided on the opposite side of the punching tool (22) across the aligned foamed molded body (10), the punching tool (22) passes through all the foamed molded bodies (10) and exits to the other side. And a removing means (28) for removing unnecessary waste (14) stored in the tip recess (36).   The compression means (26) includes a pressure plate (56, 60) provided on both sides of the foam molded body (10) and a drive capable of moving the pressure plate (56, 60) close to or away from each other. The hole forming apparatus for a foamed molded product according to claim 5, comprising a portion (62).   The foam molding body hole forming apparatus according to claim 5 or 6, wherein the tip recess (36) has an inclined surface (38) that expands toward the tip of the punching tool (22) at an inclination angle.   The hole forming apparatus for a foamed molded product according to claim 7, wherein the inclined angle (R) of the inclined surface (38) is set to 40 to 50 ° with respect to the axis of the punching tool (22). The removing means (28) includes a duct (64) having an opening capable of taking in the unnecessary waste (14) and an air suction part (66) connected to the duct (64). A hole forming apparatus for a foamed molded product according to any one of claims 5 to 8.

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