JP4866189B2 - Preform rotary gate cutting device - Google Patents

Description

  The present invention relates to a rotary gate cut device for a biaxial stretch blow molding preform formed by injection molding.

  Since the gate formed at the time of molding remains in the preform which is a primary molded product for obtaining a biaxially stretched blow molded product such as a PET bottle, the gate is cut. In a preform gate cutting device, it is required to cut in a substantially horizontal state (direction orthogonal to the gate), and it is required to collect the gate waste after cutting without scattering in the device. The In addition, there is a demand for speeding up cutting, and when replacing the cutting blade due to wear, damage, etc., it is required to be able to perform efficient replacement work, such as easy replacement and adjustment of the cutting position of the cutting blade. Yes.

  Conventionally, an apparatus for cutting a gate of a preform has a method of cutting a cutting blade while being rotated by a cylinder driving device (for example, refer to Patent Document 1) or a curved gate in order to cut the cutting surface horizontally. There has been proposed a method of cutting by moving while making contact with a fixed blade and relatively biting the fixed blade (see, for example, Patent Document 2). Furthermore, in order to prevent and reliably discharge the cut gate scraps, a method of discharging by providing a lead-out path in a movable part that rotates together with the gate cutting means has been proposed (for example, see Patent Document 3).

JP 2000-210992 A JP 2000-117788 A JP 2004-268523 A

  In the method of operating the cutting blade by the cylinder driving device as described in Patent Document 1, the device becomes expensive, the cutting speed is not stable due to compression, and the cut surface finish is insufficient, and the cutting speed is sufficient. There is a problem that it is difficult to achieve the improvement. Moreover, in the method of cutting by pressing against a curved fixed blade as described in Patent Document 2, dust may be generated depending on the situation, and it is difficult to mold the fixed blade or to install it horizontally. There is a problem that even when a part of the blade is spilled, the whole must be replaced at once. Moreover, in the gate waste discharging apparatus as described in Patent Document 3, although the gate waste can be reliably discharged, sometimes it is scattered, and there is a problem that the apparatus is complicated, poorly maintained and expensive. is there.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a preform gate cut device that can horizontally cut the gate cut surface of the preform and completely cut the gate. Objective. It is another object of the present invention to provide a preform rotary gate cutting device that can be easily attached to the cutting blade, is efficient in replacing the cutting blade, and can completely collect gate waste.

  In order to achieve this object, a preform rotary gate cut device according to the present invention is a preform gate cut device having a gate cut mechanism for cutting a gate while conveying the preform, and the gate cut mechanism Includes a guide plate that locks the mouth portion of the preform, a feed wheel that is rotatably supported and has a recessed portion that fits the body portion of the preform at a predetermined pitch, and a unit base. A plurality of cutter unit portions arranged in the radial direction on the upper surface, gate scrap collecting means for discharging the cut gate scraps, and preform pressing means for pressing the mouth of the preform. An L-shaped angle member having a preform bottom support material fitted to the bottom of the reform and having a through hole for inserting a gate at the tip; A cutter portion detachably attached to the lower surface of the letter-shaped angle material, and the L-shaped angle material is detachably attached to a lifting plate provided on a support member that rotates coaxially with the feed wheel. The lifting plate is moved up and down by a cam mechanism provided on the unit base, the cutting blade of the cutter part is advanced and retracted by the cam mechanism, and the preform pressing means has a presser head that is lifted and lowered by the cam mechanism, Depending on the preform bottom support material and the preform pressing means, the gate is cut while being clamped and the preform is floated from the feed wheel and the guide plate.

  In addition, the cam mechanism for raising and lowering the elevating plate allows the linear guide provided on the elevating plate to be fitted to the rail provided on the support member, and the cam cam provided on the unit base with the cam roller provided on the lower end of the elevating plate. It can be freely raised and lowered by fitting it into the groove. The cam mechanism for advancing and retreating the cutting blade of the cutter part has a cutting blade mounting plate attached to the fixing plate detachably attached to the lower surface side of the L-shaped angle member, and the upper surface of the cutting blade mounting plate is A wedge-shaped cutting blade with a flat bottom surface and a tapered surface is attached, and the cam roller shaft for advancing and retreating the cutting blade mounting plate is fixed, and the cam roller is fitted in the cam groove of the cam provided on the unit base. It can be made to move forward and backward.

  Moreover, it is preferable that the cam groove which fits the cam roller which advances / retracts the cutting blade mounting plate is curved outward so that the opened upper surface gradually bites the cutting blade into the gate. Moreover, it is preferable that the preform bottom part support material provided in the front-end | tip part of the L-shaped angle material of a cutter unit part has the inner surface of the cutter blade with the gate insertion hole drilled in the center part perpendicular | vertical. Further, the unit base can be raised and lowered so that the distance from the feed wheel can be arbitrarily adjusted depending on the preform size.

  As is apparent from the above, according to the preform rotary gate cutting device according to the present invention, the cutting surface of the gate is not only smoothed by gradually biting the cutter into the gate at a constant speed. The cutting blade can be cut smoothly without impact. Further, since the preform is cut by pressing from above and below, the gate does not shift when cutting, so that the cut surface can be cut horizontally and at a predetermined position. In addition, since the cam unit is used to raise and lower the cutter unit portion for pressing the preform and the preform pressing means and to advance and retract the cutting blade, the operation is smooth and the speed can be increased.

  In addition, since the cutter unit is detachable, even when the cutting blade is replaced due to wear, damage, etc., not only can the replacement be performed efficiently by replacing the cutter unit, but also after the unit is installed. There is no need to adjust the cutting blade. In addition, since the cutting blade is slidably mounted in the horizontal direction, if wear or damage occurs, remove the cutter unit and slide it to the opposite side of the part where the cutting blade is used. Thus, a new part can be used, and one cutting blade can be used separately for the left part and the right part.

  Further, since the cutting blade mounting plate for advancing and retracting the cutting blade is urged inward by a spring together with the centrifugal force, it can be cut smoothly without causing play even when the gate is cut. Moreover, since the cutter unit part can be raised and lowered and the height can be adjusted, it is possible to easily cope with different preform sizes.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings to be referred to, FIG. 1 is an explanatory plan view showing an outline of the entire gate cut device according to one embodiment of the present invention, FIG. 2 is a partial front view showing the main part, and FIG. 3 is a cutter unit part and a preform. FIG. 4 is a perspective view showing a horizontal cam for moving the cutting blade, and FIG. 5 is a perspective view showing a main part of the gate waste collecting means.

  As shown in FIG. 1, a preform rotary gate cutting device 1 includes a preform carry-in mechanism 3 for carrying in a preform P, and a gate cut mechanism for receiving the carried preform P and cutting the gate while carrying it. 5 and a preform discharge mechanism 7 that discharges the preform P with the gate cut to the next process.

  The preform carry-in mechanism 3 includes a shooter 10 that receives the preform P from the previous process, and a carry-in means 11 that separates and carries the preform P one by one. In the shooter 10, a carry-in path 10b is constituted by a pair of guide bars 10a and 10a spaced at predetermined intervals so as to lock the mouth portion of the preform P. Is provided with a pair of non-illustrated steadying bars (not shown) for preventing the preform P from shaking laterally.

  The pair of guide bars 10 a and 10 a and the steady bar are inclined so that the preform P slides toward the carrying-in means 11. The preform P is locked at the mouths by the guide bars 10a and 10a, and the body part is inserted between the touch stop bars and transferred to the carrying-in means 11. The carry-in means 11 is an intermediate mechanism for reliably delivering the preform P to the gate cut mechanism 5, and includes a feed wheel 11b rotatably disposed on the transport path 11a.

  The transport path 11 a is formed by a feed wheel 11 b and a substantially semicircular guide plate 11 d disposed along the outer peripheral side of the feed wheel 11 b and communicates with the carry-in path 10 b in the shooter 10. Cuts 11c for conveying the preforms P one by one are formed at a predetermined pitch on the outer peripheral portion of the feed wheel 11b. Although the illustration of the feed wheel 11b is omitted, it is preferable that the feed wheel 11b is transported horizontally by the feed wheel 11b and the feed wheel 21 at a predetermined interval. 11 d of guide plates are arrange | positioned with the space | interval which can insert preform P between the outer peripheral surfaces of the feed wheel 11b. The preform P is conveyed to the next cutting mechanism 5 by the feed wheel 11b while the mouth is locked to the conveyance path 11a.

  The gate of the preform P received from the preform carry-in mechanism 3 is cut by the gate cut mechanism 5. As shown in FIG. 2, the gate cut mechanism 5 includes a transfer means 13 for transferring the preform P, a gate cut means 15 for cutting the gate, and a pressing means 17 for fixing the preform to the cut means 15. The conveying means 13, the gate cutting means 15, and the preform pressing means 17 are attached to a spline shaft 19 that is rotationally driven by a driving means (not shown). The spline shaft 19 is supported by a fixed column 19a inserted in the axial direction, and rotates on the outer peripheral surface of the fixed column 19a.

  The preform transport means 13 includes a feed wheel 21 that transports the preform P, and a substantially arcuate guide plate 22 disposed on the outer peripheral side of the feed wheel 21. A gap between the feed wheel 21 and the guide plate 22 becomes the conveyance path 20. The feed wheel 21 is formed by disposing it at the tip of the rotating plate 21a with an interval at which the preform P can be inserted between the feed wheel 21 and the outer peripheral surface. The guide plate 22 is disposed on the outer peripheral side of the spline shaft 19, and the spline shaft 19 and the feed wheel 21 rotate integrally, but the guide plate 22 is fixed to the outside. Similarly to the transport path 11a, the transport path 20 is formed by a gap into which the preform P can be inserted, and communicates with the transport path 11a.

  Although not shown in the drawing, the outer peripheral portion of the feed wheel 21 is configured to be inserted between the feed wheel 11b and the feed wheel 21 in the carrying-in means 11 and rotate. Further, a substantially semicircular recess 27 into which the body portion of the preform P is fitted is formed on the outer peripheral portion forming the feed wheel 21. The pitch of the recesses 27 is the same as that of the notches 11c of the feed wheel 11b, and is configured to be delivered at a portion overlapping the feed wheel 11b.

  Next, the gate cut means 15 will be described. The gate cutting means 15 includes a unit base 30 that can be moved up and down disposed on the outer periphery of the spline shaft 19, a cutter lifting cam 31 fixed on the unit base 30, and the cutter lifting cam 31. The support member 33 is disposed and rotates integrally with the spline shaft 19, and the cutter unit 35 is attached to the support member 33 so as to be movable up and down.

  The unit base 30 can be moved up and down along the outer periphery of the spline shaft 19 by rotating a manual handle 32a of a screw jack 32 disposed on the lower surface, and the cutter unit 35 can be adjusted according to the neck length of each preform. And the feed wheel 21 can be adjusted. There are generally 5 types of preforms P for 2 liters, 1.5 liters, 1 liter, 0.9 liters, and 0.5 liters. Must be adjusted. Therefore, the present invention is configured so that the height position of the cutter can be adjusted so that preforms having different sizes can be accommodated. The unit base 30, the cutter raising / lowering cam 31, the cutting blade advance / retreat cam 60, the gate waste collection means 61, and the cam 63 of the preform pressing means 17 are fixed to a frame (not shown) and do not rotate.

  The cutter lifting cam 31 has a horizontal cam groove 31a on the circumference, and the cam groove 31a is located at the highest position of the cutter unit 35 (cut blade) when cutting the gate as will be described later. It is formed to become. The support member 33 is connected to the spline boss 37 a on the top of the spline boss 37 attached to the spline shaft 19 so that the key member 40 is engaged and can be moved up and down. Therefore, the support member 33 can rotate integrally with the spline shaft 19 and can move up and down integrally with the unit base 30.

  The cutter unit 35 is independently disposed in the plurality of radial directions on the outer peripheral side of the cutter raising / lowering cam 31 and the support member 33, and corresponds to the concave portion 27 of the feed wheel 21. In the illustrated embodiment, 32 pieces are arranged as shown in FIG. The cutter unit portion 35 includes a preform holding portion 41 that holds the bottom portion of the preform, and a cutter portion 42 that is disposed on the preform holding portion 41 so as to freely advance and retract.

  The preform holding portion 41 is provided with a preform bottom support member 44 at the tip end portion of a substantially L-shaped angle member 43, and a lifting plate having a cam roller 45 attached to the lower end portion on the inner side surface (spline shaft 19 side). 47 is detachably fixed. The elevating plate 47 is attached to a front surface of the support member 33 so as to be vertically movable by a linear guide 50 that engages a pair of rails 49 provided in a vertical direction.

  Therefore, when the cam roller 45 travels in the cam groove 31a, the preform holding portion 41 is also moved up and down together with the lifting plate 47. In addition, the cutter unit 35 can be attached to the lifting plate 47 in a detachable manner so as to replace the independent cutter unit 35 itself even when the cutting blade 59 is replaced due to wear or damage. Alternatively, the cutter unit 42 may be replaced. Therefore, not only the replacement operation of the cutting blade 59 can be performed efficiently, but also the adjustment after the mounting of the cutting blade 59, which was the most difficult operation, becomes unnecessary.

  Since the cutting blade 59 is slidably attached to the cutting blade mounting plate 53 in the horizontal direction (width direction), if the portion used by the cutting blade 59 is worn or damaged, the cutting blade 59 is cut. A new part can be used by removing the blade 59 from the fixing plate 51 and sliding and fixing it so that the opposite side (the unused part) is used. In this way, by using the left and right portions properly without replacing the cutting blade itself, it can be used at least twice.

  As shown in FIG. 9, the preform bottom support member 44 has a recess 44a for supporting the preform bottom. The upper portion of the recess 44a is gradually expanded outward, the vertical inner surface is formed to be approximately the same size as the outer diameter of the preform to be inserted, and the bottom surface is formed as an inclined surface toward the center. Yes. A through hole 44b for inserting a gate is formed at the center of the bottom surface. The through hole 44b is preferably as small as the gap between the inserted gates, and preferably has a vertical surface so as to function as a fixed blade with respect to a cut blade 59 described later.

  The cam roller 45 is fitted in the cam groove 31a. The cutter lift cam 31 having the cam groove 31a is fixed to the unit base 30 and does not rotate. Therefore, when the support member 33 and the preform holding portion 41 rotate, the lift plate 47 causes the cam roller 45 to be connected to the cam groove 45. It is guided by 31a and moves up and down. At this time, the elevating plate 47 is smoothly moved up and down by the linear guide 50 engaged with the rail 49, and the preform holding portion 41 that is detachably attached is also moved up and down integrally.

  Further, as shown in FIGS. 3 and 6 to 8, the cutter portion 42 is provided so that the cutting blade 59 advances and retreats the lower surface of the preform bottom support member 44 in the horizontal direction. In other words, the lower plate 51 of the substantially L-shaped angle member 43 is detachably mounted with a fixed plate 51 having a long hole 51a formed at the center and spring insertion portions 51b formed at both side edges. ing. The fixed plate 51 is provided with a cutting blade mounting plate 53 slidable on the upper surface of the fixing plate 51, and guides the cutting blade mounting plate 53 to both sides of the cutting blade mounting plate 53 so as to advance and retreat. A guide plate 55 is attached.

  A pressing spring 56 that urges the cutting blade mounting plate 53 toward the distal end side is attached to the spring insertion portion 51 b of the fixed plate 51. Further, a shaft 57a of a cam roller 57 is fixed to the cutting blade mounting plate 53 through a long hole 51a at the center of the fixed plate 51, and a cutting blade 59 for cutting the gate at the bottom of the preform at the tip. Are integrally attached.

  When the support member 33 and the cutter unit 35 rotate together with the spline shaft 19, the cam roller 57 is pressed against the outer surface of the cam groove 60 a fitted by centrifugal force by the pressing spring 56. It will push more strongly against the inner surface. Therefore, the cam roller 57 is always pressed against the inner surface of the cam groove 60a when the gate is cut, so that the cam roller 57 can be cut smoothly and surely at a constant speed without any play.

  As shown in the drawing, the shape of the cutting edge portion of the cutting blade 59 is formed in a wedge shape having a flat upper surface and a tapered lower surface. The cutting blade 59 can be cut horizontally and completely without leaving a gate by sliding on the lower surface of the preform bottom support member 44. At this time, a vertical surface can be formed at the lower end portion of the through hole 44b of the preform bottom support member 44, and the corner portion between the vertical surface and the bottom surface can act as a fixed blade.

  Next, the cutting blade advance / retreat cam 60 for guiding the cam roller 57 and the gate waste collecting means 61 for collecting the cut gate waste will be described. As shown in FIG. 4, the cutting blade advance / retreat cam 60 has a cam groove 60 a curved outward so as to gradually press the cutting blade 59 against the gate of the preform P conveyed by the feed wheel 21. As shown in FIG. 1 and FIGS. 2 to 4, the cutting blade advancing / retreating cam 60 is disposed with its opening surface facing upward in the middle of the rotational movement so that the cam roller 57 is fitted. Although the inlet 60b and the outlet 60c are on the track of the cam roller 57, since the central portion 60d is curved outward, the cam roller 57 is gradually moved outward.

  When the cam roller 57 moves outward, the cutting blade 59 moves together with the cutting blade mounting plate 53 to which the shaft of the cam roller 57 is fixed, and the cutting blade 59 moves to the gate of the preform P. Gradually bite into and cut. At this time, since the cam roller 57 is pressed against the inner surface of the cam groove 60a by the pressing spring 56, the cam roller 57 can be smoothly cut without pressing the action of centrifugal force and without generating play. The cutting blade advance / retreat cam 60 does not need to be provided on the entire track of the cam roller 57, and may be provided on a part of the track.

  Next, the gate waste collection means 61 will be described. The gate scrap collecting means 61 is provided to prevent the cut gate scrap from scattering or entering the apparatus and hindering the operation of the apparatus. As shown in FIGS. 1 and 5, the gate scrap collecting means 61 includes a flat and substantially funnel-shaped main body portion 61a that is curved in a plane, and a cylindrical port 61c that connects the suction duct hose 61d. The main body portion 61a is a gate. It is provided in the range where the cutting of the starting and finishing completely. As is apparent from the drawing, the main body 61a of the gate scrap collecting means 61 is disposed below the track on which the preform P is conveyed.

  The main body portion 61 a is formed in a flat and substantially funnel shape that is curved along a track along which the preform is conveyed, and the upper opening 61 b is close to the preform bottom support member 44. In order to maintain the suction force of the gate scrap, the gap with the preform bottom support member 44 is preferably as small as possible, and the lower surface of the preform bottom support member 44 is disposed with a gap through which the cutting blade 59 can enter. A cylinder port 61c at the lower end of the main body 61a is connected to suction means (not shown) via a duct hose 61d. Gate scraps falling into the main body 61a are sucked and collected by the suction means.

  A notch 61e for allowing the gate to enter is formed on the inlet side of the main body 61a of the gate scrap collecting means 61, and an elastic thin film 61f for releasing the remaining gate without being cut off is provided on the outlet side in the moving direction of the gate. It becomes. The elastic thin film 61f is preferably elastically deformed when the gate hits.

  Thus, by forming the notch 61e, the space between the upper surface of the main body 61a and the preform bottom support member 44 can be reduced, or by providing the elastic thin film 61f, the cutting blade 59 is worn or damaged. When the cutting failure occurs without being completely cut by the step, it can be dropped against the elastic thin film 61f, and if it is not dropped, the remaining gate can be passed through and detected by elastic deformation. The impact to the can be prevented.

  Next, the preform pressing means 17 will be described with reference to FIGS. The preform pressing means 17 is provided above the preform conveying means 13 so as to correspond to each preform holding portion 41. The preform pressing means 17 is formed by fitting a cam roller 67a attached to a connecting rod 67 having a pressing portion 65 fixed to a cam groove 63a of a cam 63 fixed to the upper end portion of the fixed column 19a.

  A guide bar 69 is fixed to the lower surface of the connecting rod 67, and the guide bar 69 is inserted through a rotating plate 70 fixed to the upper part of the spline shaft 19 so as to be movable up and down. On the outer periphery of the guide bar 69, a pressing spring 71 that pushes up the connecting rod 67 with respect to the rotating disk 70 is disposed. The connecting spring 67 is pushed upward by the pressing spring 71 and the cam roller 67a is pressed against the upper surface of the cam groove 63a, so that the cam roller 67a is prevented from being loose. In the above configuration, when the turntable 70 rotates together with the spline shaft 19, the connecting rod 67 also rotates integrally through the guide bar 69, the cam roller 67a slides in the cam groove 63a, and the connecting rod 67 is moved up and down. Will be moved.

  The presser portion 65 is inserted through a ball bush 65a fixed to the connecting rod 67 so that a shaft 65b having a presser head 65c fixed to the lower end portion thereof is vertically movable, and the shaft 65b is urged downward by a press spring 65d. ing. The pressing head 65c is formed so that the cutter unit 35 and the preform P are raised, and the preform pressing means 17 is lowered and the preform P is floated with respect to the feed wheel 21 when the preform P is lifted. The preform P is clamped by the pressing force of the pressing spring 65d to cut the gate.

  Next, the carry-out mechanism 7 that discharges the preform with the gate cut is opposite to the carry-in mechanism 3 and receives the preform P from the gate cut mechanism 5 and discharges it to the next process. Shooter 81. The discharge means 80 includes a carry-out path 83 and a feed wheel 85 that communicate with the transport path 20. The feed wheel 85 is formed with a recess 85 a into which the preform P is inserted, and the carry-out path 83 is formed by arranging a guide plate 82 along the outer periphery of the feed wheel 85.

  In the shooter 81, a carry-out path 87a is constituted by a pair of guide bars 87, 87 which are spaced apart so as to lock the mouth portion of the preform P. The carry-out path 87a communicates with the discharge path 83. Yes. Below the guide bars 87, 87 are provided with a pair of non-illustrated steadying bars for preventing the preform P from shaking in the lateral direction.

  Further, below the guide bars 87, 87, a conveyor 84 provided with a feed arm 84a for pushing out the preform P is disposed. A plurality of feed arms 84a are protruded at predetermined intervals in the horizontal direction on a pulley 84b rotatably supported on a vertical shaft and a belt 84c wound between the pulleys 84b and face the carry-out path 87a. In this case, the preform P is conveyed while being pushed.

  Next, the operation of the above configuration will be described. When the preforms P are loaded into the carry-in path 10b constituting the preform carry-in mechanism 3, the preforms P are conveyed one by one through the conveyance path 11a communicated by the feed wheel 11b and delivered to the next cut mechanism 5. It is. The preform P received from the preform carry-in mechanism 3 is delivered to the next cutting mechanism 5 by the feed wheel 11b while the mouth is locked to the transport path 11a.

  The preform P received from the preform carry-in mechanism 3 is put into the conveyance path 20 of the gate cut mechanism 5 and fitted into the recess 27 formed in the outer peripheral portion of the feed wheel 21. The body portion is engaged with the concave portion 27 of the feed wheel 21 while the flange portion provided on the guide plate 22 is locked, and is transferred by the rotation of the feed wheel 21. When the preform P is transported in the transport path 20 by the feed wheel 21, the cutter unit part 35 is also rotated by the coaxial spline shaft 19, so that the cam roller 45 travels in the cam groove 31a, thereby cutting the cutter. The unit part 35 rises gradually.

  When the cutter unit portion 35 is raised, the bottom portion of the preform P is fitted into the preform bottom portion support member 44 attached to the L-shaped angle member 43. At the same time that the bottom portion of the preform P is fitted into the preform bottom portion support member 44, the mouth portion of the preform P is pressed and fixed by the pressing portion 65. Since the turntable 70 is fixed to the spline shaft 19 and rotates simultaneously with the feed wheel 21 and the cutter unit 35, the connecting rod 67 is pushed down by the cam roller 67a traveling in the cam groove 63a. When the connecting rod 67 is pushed down, the shaft 65b of the presser portion 65 is also pushed down, and the presser head 65c is abutted against the mouth of the preform P.

  In this way, the cutter unit portion 35 is raised and the bottom portion of the preform P is fitted into the preform bottom portion support material 44, and at the same time, the holding portion 65 is lowered and the holding head 65c is pushed into the mouth portion of the preform P. The preform P is pressed and fixed from above and below. At the same time as the preform P is fixed, the cutting blade 59 advances by the cam groove 60a in which the cam roller 57 is fitted. The cutting blade 59 presses the centrifugal force by the pressing spring 56 and is pressed against the inner surface of the cam groove 60a. Therefore, the cutting blade 59 smoothly bites into the gate without causing play.

  At this time, the gate inserted into the through-hole 44b of the preform bottom support member 44 is cut by the cutting blade 59 that has gradually advanced. The inner surface of the through-hole 44b into which the gate is inserted is formed in a vertical surface so as to function as a fixed blade, and the cutting blade 59 that has advanced can be cut into a smooth cut surface by gradually biting into the gate. it can. The cut gate waste is recovered by the gate waste recovery means 61.

  When the cutting of the gate is completed, the cutting blade 59 moves backward, the cutter unit portion 35 is lowered, and the presser portion 65 is raised. The preform P with the gate cut is conveyed while the mouth is locked to the conveyance path 20 and is discharged by the discharge mechanism 7.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory plan view schematically showing an entire rotary gate cut device according to an embodiment of the present invention. It is a partial cross section front view which shows the principal part. It is sectional drawing which shows the principal part of a cutter unit part and a preform press means. It is a perspective view which shows the horizontal cam which moves a cutting blade. It is a perspective view which shows the principal part of a gate waste collection | recovery means. It is a top view which shows the principal part of a gate cutter part. Similarly, it is a front view which shows the principal part of a gate cutter part. Similarly, it is a side view which shows the principal part of a gate cutter part. It is an expanded sectional view of a preform bottom part support material.

Explanation of symbols

1: Rotary gate cut device 3: Preform loading mechanism 5: Gate cut mechanism
7: Preform carrying mechanism 10: Shooter
10a: Guide bar
10b: Loading path 11: Loading means
11a: Transport path
11b: Feed wheel 11c: Cutting
11d: Guide plate 13: Conveying means
15: Gate cut means
17: Preform pressing means
19: Spline shaft
19a: fixed support 20: transport path
21: Feeder
21a: Rotating plate 22: Guide plate 23: Transport base 24: Spline boss 25: Bearing
27: recess
30: Unit base
31: Cutter lifting cam 31a: Cam groove 32: Screw jack 32a: Manual handle 33: Support member
35: Cutter unit section
37: Spline boss 37a: Spline boss 40: Key member 41: Preform holding part
42: Cutter part 43: L-shaped angle material
44: Preform bottom support material 44a: Recess 44b: Through hole 45: Cam roller
47: Elevating plate
49: A pair of rails 50: Linear guide
51: Fixed plate
51a: long hole 51b: spring insertion portion 53: cutting blade mounting plate
55: Guide plate
56: Pressing spring
57: Cam roller
57a: cam roller shaft 59: cutting blade 60: cutting blade advance / retreat cam 60a: cam groove 60b: cam groove inlet 60c: cam groove outlet 60d: cam groove central portion 61: gate scrap collecting means 61a: substantially funnel shape Main body 61b: Upper opening 61d: Suction duct hose 61c: Tube opening 61e: Notch 61f: Elastic thin film 63: Cam 63a: Cam groove 65: Pressing portion 65a: Ball bushing 65b: Shaft 65c: Pressing head 65d: Pressing spring 67: Connecting rod 67a: cam roller 69: guide bar 70: rotating disc 71: pressing spring 80: discharge means 81: shooter 82: guide plate 83: discharge path 85: feed wheel 84: conveyor 84a: feed arm 84b: pulley 84c: belt 85a : Concave portion 87: Guide bar 87a: Unloading path

Claims (6)

  A preform gate-cutting device having a gate-cut mechanism for cutting a gate while conveying a preform, the gate-cut mechanism comprising a guide plate for locking the mouth of the preform and a pivotally supported As a result, a feed wheel in which a concave portion for fitting the body portion of the preform is formed at a predetermined pitch on the outer peripheral portion, a plurality of cutter unit portions arranged in the radial direction on the upper surface of the unit base, and cut gate waste are discharged Gate cutter collecting means and preform pressing means for pressing the mouth of the preform, and the cutter unit part has a through hole for fitting the bottom of the preform and inserting a gate. An L-shaped angle member provided with a material at the tip, and a cutter portion detachably attached to the lower surface of the L-shaped angle material, the L-shaped angle Is detachably attached to an elevating plate provided on a support member that rotates coaxially with the feed wheel, and the elevating plate is raised and lowered by a cam mechanism provided on a unit base. The preform rotary gate cutting device, wherein the cutting blade is advanced and retracted by a cam mechanism, and the preform pressing means has a presser head which is moved up and down by the cam mechanism.   The cam mechanism that raises and lowers the lifting plate fits the linear guide provided on the lifting plate to the rail provided on the support member, and the cam roller provided on the lower end of the lifting plate in the cam groove of the cam provided on the unit base. The rotary gate cut device for a preform according to claim 1, wherein the rotary gate cut device can be moved up and down by fitting.   The cam mechanism for advancing and retreating the cutting blade of the cutter part has a cutting blade mounting plate attached to the fixing plate detachably attached to the lower surface side of the L-shaped angle material, and the upper surface of the cutting blade mounting plate is flat. A wedge-shaped cutting blade whose bottom surface is tapered is attached, and a cam roller shaft for advancing and retracting the cutting blade mounting plate is fixed, and the cam roller is fitted in a cam groove of a cam provided on the unit base. The preform rotary gate cut device according to claim 1 or 2.   The cam groove for fitting a cam roller for advancing and retreating the cutting blade mounting plate has an open upper surface curved outward so that the cutting blade gradually bites into the gate. A rotary gate cutting device for a preform according to any one of the above.   The preform bottom support member provided at the tip of the L-shaped angle member of the cutter unit portion has an inner surface of a cutter blade in which a gate insertion hole formed in the center portion is vertical. 5. A preform rotary gate cut device according to any one of 1 to 4.   6. The preform rotary gate cut device according to claim 1, wherein the unit base is movable up and down so that an interval between the unit base and the feed wheel can be arbitrarily adjusted according to a preform size. .

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