JPH07108517B2 - Cutting device for resin tubular moldings - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for smoothly cutting a synthetic resin tubular molded product without deforming it .

[0002]

2. Description of the Related Art A synthetic resin tubular molded article, for example, an air intake duct D connected to an inlet pipe A ₁ of an air cleaner A of a vehicle engine E as shown in FIG. 8 is accommodated in a narrowly confined engine room. In addition, since it is not straight, it is appropriately bent and provided with a bellows portion D ₁ for adjusting the length and direction, a fixing bracket D _{2 and the} like in the middle, and it is necessary to reduce the thickness in accordance with the purpose of weight reduction. Mainly by blow molding, and depending on the production plan, the same thing is reversed in direction as shown in FIG. 9 to make a state in which two are connected, and after molding, this is divided into two parts from the center.

[0003] Upon bisecting the duct D of the two-up so far is set in the cutting device G guillotine type, as in FIG. 10, or Oshikiru a plate-shaped blade C _1, 11
As shown in FIG. 12, the duct D is rotated on the pedestal E to be melted by the flame of the gas burner B, or as shown in FIG. 12, the rotary blade C ₂ is moved in a certain direction to be cut.

[0004]

By the way, in the means for pushing down with the plate-shaped blade, the blade is dented when the blade is pressed against the forming duct, and there is an elastic rebound at the dented portion, so that the blade can be cut effectively. It is not possible to make it, and the cut end is not straight but has irregularities, and since it is not thin and simple shape, it is difficult to set it stably on the device, and in the case of a flame, the fire power and injection state of the flame to the molding duct are always constant It is necessary to take measures for safety against burns and fires, and when using a high-speed rotating blade, chips enter the duct and completely remove it in the subsequent process. There is a problem that it must be removed.

Therefore, an object of the present invention is to easily and smoothly cut a resin-made thin tubular molded product in a stable state with a low resistance without deforming it.

[0006]

In order to achieve the above object, the present invention provides a base for a resin tubular molding cutting device.
First and second bodies standing upright next to each other and those
On the top of the body, which can be opened and closed relative to the body
The second head forms the fuselage, and the first body and head
Semi-circular split gears are rotatably installed inside
However, inside the second body and the head, there are multiple covers on the inner peripheral surface.
Semi-annular cutter guy with grooving at a predetermined interval
Installed on the front side of each split gear.
Align the position of each cam groove on the guide with the blade-shaped cutter.
A semi-annular cup that is slidably arranged in the radial direction.
Each cutter holder, and this cutter holder
Is rotatably fitted inside the cutter guide, and the split gear
The cutter is pushed inward by one rotation or less and tubular
The feature is that the molded product is cut .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a view showing a body portion of an apparatus according to the present invention in a separated manner. The body body is a prism-shaped first body 1 and a second body 2, which are paired on the left and right sides. 2 is composed of a block-shaped first head 3 and a second head 4 and a base 5 which are arranged to be openable and closable, and the first body 1 has an upward semicircular shape for inserting a molded product on the upper end surface thereof. Slot 1
a and an upward semicircular bag hole 1 for inserting gears of a larger diameter
b are formed in a stepped manner so that they are adjacent to each other on the right and the left, and the insertion hole 1c of the small gear 8 on the motor m-axis penetrates the body below the holes 1a and 1b , and one of the peripheral surfaces is formed. Part is blind hole 1b
A bracket 1d having a through hole 1e is provided at the center of the upper end of one surface so as to project laterally upward, and the first head 3 to be stacked on the first body 1 is formed. Is a downward semicircular groove 3 for inserting a molded product.
a and the gear insertion bag hole 3b are the holes 1a of the first body 1 ,
1b , and a blind hole 3b in the center of the upper part.
Is provided with a through hole 3c communicating therewith, a reflection type optical sensor 12 is attached to the outer end portion of the through hole 3c, and a bracket 3d having a through hole 3e is attached to the right end of one side of the body bracket 1d. It is provided so as to project laterally downward so as to contact the right side.

Further, an upper semi-circular groove hole 2a for inserting a molded product and a bag hole 2b for inserting a cutter guide having a diameter substantially the same as that of a gear are adjacent to each other on the left and right sides of the upper end surface of the second body 2. A groove 2c for inserting a motor shaft is formed below the bag hole 2b, and a through hole 2e aligned with the through hole 1e of the first body 1 is formed at the center of the upper end of one side surface. Equipped bracket 2
d is provided so as to project laterally upward, and the second head 4 which is superposed on the second body 2 has a downward semicircular groove 4a for inserting a molded product and a cutter guide insertion hole. each hole 2a of the blind bore 4b of the large-diameter second body 2, is formed to face the 2b, bracket 4d having a through hole 4e at the left of the one side are those on the left side of the second body 2 of the bracket 2d It is provided so as to project laterally downward so as to contact.

On the other hand, a notch 5a is formed at the center of one side of the base 5.
A cylinder member 6 is erected on the notch portion 5a so as to be tiltable, and an arm member 6b having a through hole and a slit at its tip is rotatable on a forked block at the upper end of the piston rod 6a. And the slit portion of the arm member 6b is
The brackets 1d and 2d of the second bodies 1 and 2 are interposed.

Then, the first body 1 and the second body 2
Are integrally connected by a plurality of screw rods 13 and are fixed on the base 5 as shown in FIGS.
The second head 4 and the second head 4 are also integrally connected by a plurality of screw rods 13, and the bracket 3d on one side of the first head 3 is brought into contact with the right side of the bracket 1d of the first body 1 and
The bracket 4d on one side of the head 4 is brought into contact with the left side of the bracket 2d of the second body 2, and the through hole 1 of each bracket
e, 2e, 3e, 4e and the first and second brackets 1
e, 2e are aligned between the through holes of the arm member 6b, and the pin shaft 14 (FIG. 3) is inserted through the through holes.
The first and second heads 3 and 4 are connected to the piston rod 6a by keying the through holes 3e and 4e of the pins 3 and 4 to the pin shaft 14 and tightening the slit portion of the arm member 6b with the machine screw 15. The piston rod 6a is expanded and contracted to move the first and second
The heads 3 and 4 can be opened and closed with respect to the first and second bodies 1 and 2.

In connecting the first and second bodies 1 and 2 and the first and second heads 3 and 4 as described above, the following members are incorporated between them. That is, FIG. 4 shows the split gear 7 divided into upper and lower parts.
Has a semi-annular shape with a groove hole 7a for fitting a molded product inside, and a plurality of (two in the figure) guide pins 7b are planted at predetermined intervals on one side, and one (upper side in the figure)
A detection hole 7c for the optical sensor 12 is provided at the center of the peripheral portion of the split gear 7, and these upper and lower split gears 7 are respectively arranged in the first body 1 and the first head 3 as shown in FIGS. Is rotatably fitted in the bag holes 1b and 3b of the first head 3 and the detection hole 7c of the upper split gear 7 is aligned with the through hole 3c of the first head 3, while the lower split gear 7 is right side of the first body 1. It is meshed with the small gear 8 on the motor shaft inserted into the insertion hole 1c from the end face.

FIG. 5 shows a cutter holder 9 having a diameter smaller than that of the split gear 7. Like the gear 7, the cutter holder 9 is divided into upper and lower parts and a semi-annular body having a groove hole 9a for fitting a molded product therein. A radial groove 9b having a required width is formed corresponding to the position of the guide pin 7b on the split gear 7, and each radial groove 9b has a pointed sword-like shape as shown in FIG. The cutters 10 each having a long hole 10a are slidably fitted and arranged, and the split cutter holder 9 has an inner semicircular groove hole 9a aligned with the groove hole 7a of the split gear 7 and is provided with each cutter. The guide pins 7b on the gear 7 are fitted into the elongated holes 10a of 10 respectively,
It is screwed to the front surface of the split gear 7.

Further, FIG. 6 shows a pair of upper and lower cutter guides 11.
The outer diameter is slightly smaller than the outer diameter of the split gear 7, the inner diameter is a semi-annular body of a size that can fit the cutter holder 9, and the inner peripheral surface of the cutter holder 9 is arcuate cam groove 11 in accordance with the position of each release morphism groove 9b
a is provided respectively , and these upper and lower cutter guides 11
Is a bag hole 4 of the second head 4 and the second body 2 as shown in FIG.
They are housed in b and 2b and screwed to the head 4 and the body 2, respectively.

Thus, when the above members are assembled, the upper and lower split gears 7 are housed in the first head 3 and the bag holes 3b and 1b of the first body 1 as shown in FIGS. The upper and lower cutter holders 9 integrated therewith are rotatably fitted inside the upper and lower cutter guides 11, and the plurality of cutters 10 in the radial groove 9b are sandwiched between the cutter holder 9 and the split gear 7. When not in operation, as shown in FIGS . 3 and 7 , the rear end of the cutter guide 11 enters the cam groove 11a and is retracted so that the blade edge does not come out of the inner groove 9a (however, in FIG. The cutter 10 is shown in a state in which the molded product duct D is difficult to be inserted), and the split gear 7 is provided with a plurality of ball plungers 16 from the surface of
It is pressed in the Bode-2 and the head 4 side, split gear 7 and Ca
The rattling of the cutter holder 9 is prevented, and the cylinder member 6, the motor m, the sensor 12 and the like are operated at a predetermined timing by a controller (not shown).

In FIG. 2, reference numeral 17 is a work table attached to the outer surface required height positions of the first and second bodies 1 and 2, and 17a is a work receiver provided on both sides of the work table. Is a switch member provided at a required position on the table.

Under the above construction, when the cylinder is not in operation, the cylinder member 6 is contracted and the first and second heads 3 and 4 are opened upward as shown by the chain line in FIG. The duct D, which is a resin-molded product, is fitted into the semicircular groove holes 1a and 2a of the first and second bodies 1 and 2 so that the central portion of the duct D is aligned with the cutter 10 and both sides of the table 17 are covered. When the switch rod S is closed by fitting and setting it on the workpiece receiver 17a, the piston rod 6a extends as shown by the solid line in FIG. 3, and the first and second heads 3, 3 which are integrated via the arm member 6b. 4 closes towards bodies 1 and 2. At that time, the central portion of the duct D is surrounded by the first and second bodies 1 and 2 and the slots of the heads 3 and 4, and the cut portions are formed by the cutting edges of a plurality of cutters 10 arranged at predetermined intervals. You will be surrounded.

When the first and second heads 3 and 4 are closed, the motor m is started, and at the same time, the optical sensor 12 attached to the outer surface of the first head 3 is actuated so that predetermined light passes through the through hole 3c and the detection hole. It is fired toward 7c.

When the motor m is started, the small gear 8 rotates, and the rotation is transmitted to the lower and upper split gears 7,
Lower and upper cutter holders 9 integrated with this
Rotates with the plurality of cutters 10 inside the lower and upper cutter guides 11.

Therefore, each cutter 10 whose rear end is engaged with the cam groove 11a of the cutter guide 11 has a cam groove 11a.
The blade is forcibly pushed out from a, and the pushing action causes each blade edge to pierce the duct D from the peripheral surface, and the rear end contacts the inner peripheral surface of the upper and lower cutter guides 11 as shown by the dotted line in FIG. Then, it rotates together with the split gear 7 and disconnects the duct D.

In the process, predetermined light is projected from the optical sensor 12 on the side surface of the split gear 7 through the through hole 3c of the first head 3, and the reflected light is captured by the sensor and the motor m is Although it continues to rotate, when the gear rotates once and the detection hole 7c of the upper split gear 7 is aligned with the through hole 3c of the first head 3, there is no reflected light from the gear side surface, and the motor m is Stop. At that time, each cutter 10 is again aligned with the cam groove 11a of the cutter guide 11, and is pulled outward to engage the rear end with the cam groove 11a.

Thus, when the motor m is stopped, the piston rod 6a is contracted, the first and second heads 3 and 4 are opened via the arm member 6b, and the cut duct D is taken out. Prepared for work.

In the illustrated example, the cutter holder 9 is provided with four cutters 10 at equal intervals, and the holder is rotated once to detect the end of cutting. Since the cutting can be performed with one rotation, the split gear 7 may be provided with a plurality of detection holes 7c to detect the end of cutting with a rotation of one rotation or less. The number of spaces is not limited to four as long as they are surrounded by a plurality of spaces. Further, in the above-mentioned example, the air intake duct of the vehicle air cleaner has been described as the molded product, but the invention is not limited to this and can be applied to the case of cutting other tubular molded products.

[0023]

EFFECT OF THE INVENTION The present invention is a device for cutting a resin tubular molded article.
As described above, it is suitable for cutting work.
Or cut both sides of the cut part of a synthetic resin thin-walled tubular molded product.
The first and second bodies and the first and second heads, which form a pair, respectively.
It can be surrounded by
Sometimes the circumference of the cutting part is surrounded by multiple sword-shaped cutters.
To cut simultaneously from multiple locations and cut in the circumferential direction.
Guillotine-style stamps that can be used
Bounce without causing distorted deformation in the molded product compared to the step
The return resistance is reduced and the molded product can be cut easily and surely.
The cutting edge is straight and smooth, and the rotation range of the cutter is small and no flame is used, so safety and workability are good, and no work is required after removing chips like a high-speed rotating blade. It is suitable for mass production.

[Brief description of drawings]

FIG. 1 is a perspective view showing a machine body portion of an apparatus according to the present invention separately.

FIG. 2 is a partially cutaway front view of the device assembled.

FIG. 3 is a side view of FIG. 2 taken along line XX.

FIG. 4 is a perspective view of a pair of split gears.

FIG. 5 is a perspective view of a pair of cutter holders.

FIG. 6 is a perspective view of a pair of cutter guides.

FIG. 7 is a perspective view of a part of the cutter holder showing a mounted state of the cutter.

FIG. 8 is a perspective view showing a usage state of the air duct.

FIG. 9 is a perspective view of a two-piece air duct.

FIG. 10 is a perspective view of a conventional example of a type of cutting with a plate-like blade.

FIG. 11 is a perspective view of a conventional example of fusing with a gas burner.

FIG. 12 is a perspective view of a conventional example of cutting with a rotary blade.

[Explanation of symbols]

 1 1st body 1a groove hole 1b blind hole 2 2nd body 3 1st head 3a groove hole 3b blind hole 4 2nd head 5 base 6 cylinder member 6b arm material 7 split gear 8 small gear 9 cutter holder 9b radial groove 10 Cutter 11 Cutter guide 11a Cam groove 12 Optical sensor

Claims (1)

[Claims] 1. A first and a first standing upright adjacent to each other on a base.
Can be opened and closed for 2 bodies and above them
A first head and a second head which are arranged in the
A semi-circular split gear is turned inside the day and head respectively.
It is movably arranged, and the inner circumference is inside the second body and head.
Semi-annular shape with multiple cam grooves on the surface at predetermined intervals
Attach the cutter guides of the
On the side, align with the position of each cam groove of the above cutter guide.
A blade-shaped cutter is arranged so that it can slide in the radial direction between the cutter and the gear.
Attach the semi-annular cutter holders, and
Fit the cutter holder inside the cutter guide and divide
Push the cutter inward by turning the gear less than one rotation.
Resin tubular that is characterized by cutting out the tubular molded product
Cutting device for molded products.