JPH0651344B2 - Rotary blow molding machine - Google Patents

Description

The present invention relates to a rotary blow molding machine for blow molding a detergent container, a cosmetic bottle or the like from a parison.

[Conventional technology]

For example, below an extruder that vertically extrudes a parison made of a thermoplastic resin, a turntable on which a plurality of pairs of opening / closing molds for sandwiching the parison and performing blow molding are mounted is disposed. A rotary type in which a drive gear for transmitting the rotation of a motor is meshed with an annular driven gear provided in the lower part of the rotary table to intermittently rotate the turntable to continuously form a hollow resin product. There is a blow molding machine (this similar structure is disclosed, for example, in Japanese Patent Laid-Open No. 63-2
No. 56420).

[Problems to be Solved by the Invention]

However, in the conventional rotary blow molding machine, when the screw for kneading the thermoplastic resin of the extruder is extracted and cleaned, the pair of open / close molds on the turntable and the screw extracted by the extruder interfere with each other. It was necessary to move the above turntable along, for example, a pair of moving rails arranged at the installation location. As a result, a large installation space was required.

Therefore, the present invention provides a rotary blow molding machine capable of solving the above problems.

[Means for Solving the Problems]

A rotary blow molding machine in which a turntable having a plurality of molds for sandwiching the parison and performing blow molding is rotatably arranged below an extruder for extruding the parison. A swivel drive mechanism for swiveling the extruder in the horizontal direction is provided in the extruder.

[Action]

When cleaning the extruder, the extruder is rotated with respect to the turntable by a rotation drive mechanism. As a result, the extruder and the mold on the turntable do not interfere with each other, and cleaning can be easily performed. Moreover, since the extruder can be freely rotated with respect to the turntable, the installation space of the rotary blow molding machine can be saved.

〔Example〕

 An embodiment of the present invention will be described below in detail with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a rotary blow molding machine, which has an extruder 10 for vertically extruding a tubular molten parison 2 made of a thermoplastic resin. This extruder 1
A pair of open / close dies 8 for sandwiching and blowing the molten parison 2 on a turntable 7 rotatably supported by a support shaft 6 (see FIG. 8) on a base 5 attached to 0. Six sets of 8'are mounted on each base plate 9, and a pair of opening and closing molds 8 and 8'of these six sets intermittently rotate in a section from station A to station F shown in FIG. Then, the molten parison 2 is formed into a molded product 2'which becomes, for example, a detergent container, a cosmetic bottle, etc.
The blow molding can be continuously performed (see FIG. 11).

As shown in FIGS. 1 to 4, the extruder 10 includes a lower base 11 and an upper base 11 provided on the lower base 11 so as to be horizontally rotatable with respect to the lower base 11 by a rotation drive mechanism 20. 12 and an extruder main body 13 which reciprocates vertically on the upper base 12 by a vertical drive mechanism 30 and supplies the molten parison 2 into the pair of opening and closing molds 8 and 8'when descending. Has been done.

As shown in FIGS. 1 to 4, the extruder main body 13 has a hopper 14 for charging a pellet-shaped thermoplastic resin (raw material) on the upper rear side thereof, and at the bottom of the hopper 14, A cylinder 18 having a screw 16 which is rotated by a motor 15 and the like and whose outside is heated by a heater (not shown)
have. The thermoplastic resin heated and melted in the cylinder 18 is turned into three tube-shaped molten parisons 2, 2, 2 by a tubular pushing die head 19 provided at the tip of the cylinder 18 and a pair of vertically downward opening / closing dies 8 is formed. ，
It is adapted to be simultaneously extruded and supplied into each of the three cavities of the same shape formed in 8 '. The number of molten parison 2 extruded from the extruder body 13 is not limited to three, and may be one, two, or four or more.

As shown in FIGS. 1 to 4, the swivel drive mechanism 20 includes guides 21 fixed to the four corners of the upper surface of the lower base 11.
And guides 22 fixed to the four corners of the lower surface of the upper base 12 so as to be slidable with respect to the guides 21, and a slewing ring bearing (inner bearing) having inner teeth 23a on the inner peripheral surface. 23 is fixed to the upper surface of the lower base 11, and a drive gear 27 fixed to the shaft portion 26a is composed of a motor 26 that meshes with the inner teeth 23a of the inner bearing 23.

As shown in FIGS. 2 to 4, the vertical drive mechanism 30 includes a pair of hinges 31 and 31 provided between a rear portion of the upper base 12 and a rear portion of the extruder body 13, and a front portion of the upper base 12. And a front portion of the extruder main body 13, and a pair of shock absorbers 32, 32 interposed between the pair of brackets 33, 33 standing on the front side of the upper surface of the upper base 12 and having one end pivotally supported. The links 34, 34, a link 36 whose one end is axially supported by a pair of brackets 35, 35 hanging down to the front side of the lower surface of the extruder main body 13, and a bracket 37 erected on the upper surface of the upper base 12 are vertically swung. The pair of links 3 is rotatably supported and is attached to the U-shaped portion at the tip of the rod 38a.
A hydraulic cylinder 38 pivotally supported by pins so as to sandwich the other ends of the links 34 and 34 and the other end of the link 36.

As shown in FIGS. 5 and 7, the parison cutting device 40 is disposed below the die head 19 and is supplied into the pair of open / close molds 8 and 8 ′. , 2, 2 are cut into a certain length so that the upper ends 2a, 2a, 2a of the two, 2 and 2 slightly project from the upper surfaces of the pair of opening / closing dies 8, 8 '. This parison cutting device 40
Is fixed to the extruder body 13 and fixed to the cylinder 18
A base plate 41 extending horizontally below the front part of the base plate, an air cylinder (actuator) 42 supported on the base part of the base plate 41 so as to be swingable in the left-right direction via a support shaft 43, and a central part of the shaft part 44a. Is fitted to a one-way clutch 46 fixed to the lower surface of the tip of the base plate 41 with a bolt 45, and the tip of the rod 42a of the air cylinder 42 is pivotally supported by a pin so that the rod 42a reciprocates back and forth in one direction (clockwise). Rotating plate 4 that rotates in
4, a mounting plate 47 fixed to the lower end of the shaft portion 44a of the rotating plate 44, and a cutter 48 having a triangular tip attached to the upper surface of the front portion of the mounting plate 47 via a plurality of bolts 49 and the like. And a cutter positioning mechanism 50 which is provided on the base plate 41 and is provided side by side with the air cylinder 42 and the rotary plate 44 to determine the cutting start position (rotation start position) of the cutter 48. And the cutter 4
No. 8 does not reciprocate but rotates in one direction so as to cut the upper ends 2a, 2a, 2a of the respective molten parisons 2, 2, 2;
Each can be cut into a constant state, for example, a constant length. The upper end 2a of each molten parison 2 is left as an upper burr 2a '(burr at the mouth) on the upper part of the molded product 2'after blow molding.

As shown in FIGS. 5 and 6, the cutter positioning mechanism 50 includes a small air cylinder 51 fixed to the base plate 41 so as to be arranged substantially parallel to the air cylinder 42, and a support shaft 53 on the base plate 41. And a pair of links 52, 52 supported swingably on the recess 41a of the base plate 41, and the pair of links 52, 52 at both ends.
52 and the tip 51 of the rod of the air cylinder 51
An intermediate link 54 pivotally supported by a and a pair of links 52, 52 are rotatably supported via a support shaft 56 between the tips of the links 52, and have an arc shape formed on the outer periphery of the rotary plate 44. The roller 55 is configured to come into contact with and separate from the notch 44b so as to determine the cutting start position (rotation start point position) of the cutter 48.

A turntable 7 rotatably supported on the base 5 via a support shaft 6 has its lower surface peripheral edge mounted on a large number of bearings 60 erected on the base 5, and at the outer periphery of the turntable 7. Has an annular driven gear 61 fixed thereto. The driven gear 61 is meshed with a pair of idle gears 62, 62 which are rotatably supported via respective supports 63 provided upright on the base 5. Further, the pair of idle gears 62, 62 mesh with a drive gear 66 attached to a speed reducer 65 of the AC servo motor 64 on the base 5. A pair of idle gears 6 is provided between the drive gear 66 and the driven gear 61 on the outer circumference of the turntable 7.
Since the second and second gears are interposed, the backlash between the gears can be eliminated, and the turntable 7 can be intermittently rotated and positioned with high precision.

Further, as shown in FIGS. 1 and 8, a door-shaped gate frame 67 is erected from the position of the station B of the turntable 7 on the base 5 to the position of the station E so as to straddle the turntable 7. is there. Further, at the position of the station F of the turntable 7 on the base 5, a molded product container 68 and a chute 69 for housing the taken-out molded product 2'is provided upright. At the position of the station B of the turntable 7 of the gate frame 67, a burr for correcting the upper end 2a of the molten parison 2 before solidification protruding above the upper surfaces of the pair of open / close molds 8, 8'to a flat standing state. A shape correction mechanism 70 is provided. In addition, the above-mentioned molded product container 68
Upper frame 68a protruding above the turntable 7
Between the inner frame 68b and the middle frame 68b, the upper burr 2a 'of the molded product 2'is grasped and raised when the pair of open / close molds 8, 8'after hollow molding is opened, and then the molded product 2' A molded product take-out device 80 is provided for picking up the upper burr 2a 'and taking out the body 2b' while gripping it.

The burr shape correcting mechanism 70 is, as shown in FIGS. 8 to 10, a station B of the turntable 7 of the gate frame 67.
Of the pair of opening and closing molds 8 and 8 ', and the four guide bolts 73, ... U-shaped mounting plate 74
And a pair of guide shafts 75, 75 spanning both side portions 74a, 74a of the mounting plate 74, which penetrates and slides to project above the upper surfaces of the pair of opening / closing dies 8, 8'before solidification. A pair of clampers 76, 76 for fixing the upper ends 2a, 2a, 2a of the respective molten parisons 2, 2, 2 to a flat standing state, and both side portions 74a of the mounting plate 74,
Each of the clampers 76 is attached to the center of the outside of 74a, and the tip of each rod 77a is fixed to the center of each of the clampers 76.
And a pair of air cylinders 77, 77 for abutting and separating.

Further, as shown in FIG. 11, the molded product take-out device 80 is disposed in the upper frame 68a of the molded product container 68, and when the pair of open / close molds 8, 8'after blow molding is opened,
An upper burr gripping and taking out mechanism 81 for gripping and ascending the upper burr 2a 'of each molded product 2'and a middle frame 68b of the above described molded product storage container 68 are raised by the upper burr gripping and taking out mechanism 81. A suction gripping and conveying mechanism 90 for sucking the upper burr 2a 'of each molded product 2'and gripping the body 2b' of the molded product 2'to rotate 180 ° to store the molded product 2'in the molded product storage container 68. It consists of and.

As shown in FIGS. 11 to 14, the upper burr gripping and taking out mechanism 81 includes an air cylinder 82 which is erected on the tip side of the upper frame 68a of the molded product container 68 and a rod 82a of the air cylinder 82. The rod 82 fixed to the tip
A substantially U-shaped mounting plate 83 that moves in the vertical direction by expansion and contraction of a, and both side parts 83a, 8 of the mounting plate 83.
Penetrating a pair of guide shafts 84, 84 laid across 3b,
A pair of chucks 85, 8 for slidingly gripping the upper burr 2a 'of the molded product 2'from within the pair of open-close dies 8, 8'when opened.
6 and the center of the inner surface of one side portion 83a of the attachment plate 83, and the tip of the rod 87a is attached to the chuck 8 of one side.
6 is attached to both sides of the outer surface of the one side portion 83a of the attachment plate 83, and the tip of each rod 88a is fixed to both sides of the other chuck 85, and the other chuck 85 is attached. The three chuck pieces 89 and a pair of air cylinders 88, 88 for bringing the one chuck 86 into and out of contact with each other. The rods 87a, 8 of the air cylinders 87, 88 are
By the movement of 8a, the upper burr 2 of the molded product 2'is formed by the three chuck pieces 89 of the one chuck 85 and the other chuck 86.
Hold the upper end of a'to hold the rod 82 of the air cylinder 82.
a pair of open / close molds 8 when the molded product 2'is opened by retreating a,
The upper frame 6 taken out from 8
It is designed to be raised to a predetermined position below 8a.

As shown in FIGS. 11 and 15 to 17, the suction gripping and conveying mechanism 90 includes a pair of arms 91 and 91 that rotate every 180 ° by a motor 92 that is erected on the middle frame 68b of the molded product container 68. A slide frame 94 slidably provided in the front-rear direction along a pair of guide shafts 93, 93 provided on both sides of the front end of each arm 91.
The tip of the rod 95a is fixed to the slide frame 94, and the slide frame 94 is moved forward and backward.
Attached to the front surface of the upper portion of the slide frame 94 at an equal distance,
The three suction pads 96 for vacuum-sucking the upper burr 2a 'of the molded product 2'and the lower front surface side of the slide frame 94 are equidistantly mounted, and each air cylinder 98 mounts the body 2b' of the molded product 2 '. Gripping or releasing grip 3
Each pair of gripping pieces 97, 97 is constituted.
Reference numeral 99 in FIG. 11 is a proximity switch. The proximity switches 99 cause the suction pads 96 and the pair of gripping pieces 97, 97 provided at the front ends of the pair of arms 91, 91, respectively. A pair of open / close molds 8,
The rotational positions of the pair of arms 91, 91 are determined so that they come on the 8'and the shooter 69 of the molded product container 68, respectively.

60 ° on the turntable 7 through 6 base plates 9
Six pairs of opening / closing molds 8 and 8'each of which is arranged at intervals.
Can be opened and closed by the mold clamping device 100 shown in FIGS. The mold clamping device 100 includes three support blocks 102 standing upright on the base plate 9 at equal intervals.
And a pair of guide shafts 101 and 101 fixed so as to be parallel to the horizontal direction via
A pair of movable plates 10 which are slidably provided on 1, 101 and have the above-mentioned molds 8 and 8'fixed on the opposite surfaces, respectively.
3, 103 ′, a pair of clamp rods 104, 104 ′, one end of which is fixed to the back side of each movable plate 103, 103 ′ to bring the molds 8, 8 ′ into and out of contact with each other, and the base plate. A bracket 106 which is erected at one end (outer side) of the shaft 9 is swingably supported via a pivot shaft 107 located below the height of each of the guide shafts 101, 101. Intermediate link 108 at the end
A rocking lever 10 having a pin pivotally supported via a lower end and a lower end protruding downward from an upper surface of the base plate 9 through an opening 9a.
5 and a pair of blocks 109 and 10 below the base plate 9.
The intermediate link 108 is slidably supported via 9 and has one end pivotally supported by the intermediate link 111 on the other end of the clamp rod 104 ′ of the swing lever 105.
Of the slide rod 110 and the clamp rod 104 of the other side through the opening 9b of the base plate 9 and the slide rod 110 that is pin-pivotally supported at the lower end that is equidistant from the other end of the base plate 107 and the pivot 107. A bracket 1 that connects the ends and stands up at the other end (inside) of the base plate 9
The connecting plate 112 sliding along 13 and a pair of hydraulic cylinders (actuators) 114 and 115 hanging at positions corresponding to the stations A and F of the gate frame 67 make the connecting plate 112 reciprocate freely. The hydraulic cylinder 114 moves the connecting plate 112 forward to close the pair of opening / closing molds 8 and 8 ', and the other hydraulic cylinder 115 moves the connecting plate 112 back to open the pair of opening / closing molds. It is composed of a toggle mechanism 120 which opens 8, 8'and holds these states.

The toggle mechanism 120 is rotatably supported in a vertical direction by a bracket 113 standing on the other end (inside) of the base plate 9 via a support shaft 122, and one end thereof is the other hydraulic cylinder 1 described above.
The first link 121 is pressed by 15, and the other end is flipped upward, and the middle portion is pin-pivotally supported by the other end of the first link 121 and the other end is pivotally supported by the connecting plate 112. In addition, when the other end of the first link 121 is slid along the opening 113a of the bracket 113 and the other end of the first link 121 is flipped upward, the connecting plate 112 is returned and the roller 124 rotatably supported at one end. And a second link 123 that is pressed by the one hydraulic cylinder 114 to move the connecting plate 112 forward.

A procedure for blow molding the molten parison 2 by intermittently rotating the pair of open / close molds 8 and 8 ′ from the station A to the station F by the rotary blow molding machine 1 of the above embodiment will be described.

First, at Station F, as shown in Figure 18,
The pair of open / close molds 8 and 8 ′ from which each molded product 2 ′ is taken out by the molded product take-out device 80 are rotated to the station A. Therefore, when the AC servomotor 64 is stopped and the pair of opening / closing molds 8 and 8'stops at the station A,
The pair of open / close molds 8 and 8'is closed by the mold clamping device 100 so as to sandwich the molten parisons 2, 2 and 2 already extruded to a predetermined length. That is, the roller 124 of the second link 123 of the mold clamping device 100 is pressed downward by the hydraulic cylinder 114, and the connecting plate 112 moves on the base plate 9 to the outer side (the outer side in the radial direction of the turntable 7) ( Move forward). By the forward movement of the connecting plate 112, one clamp rod 104 pushes one mold 8 in a closing direction, and the other clamp rod 104 ′ moves the slide rod 110, the intermediate ring 111, the swing lever 105, the intermediate link 108. And moves in the opposite direction to the one clamp rod 104 and pushes the other die 8'in the closing direction. Thereby, the pair of open / close molds 8,
8'is instantly closed by sandwiching the three molten parisons 2, 2, 2. At the same time as the mold clamping of the pair of open / close molds 8 and 8 ', the cutter 48 is moved to the fifth position by moving the rod 42a of the air cylinder 42 of the parison cutting device 40 forward and backward.
By rotating at high speed in one direction (clockwise direction) of the arrow in the figure, the three molten parisons 2, 2 and 2 are instantly cut.
Since the cutter 48 rotates in one direction by the one-way clutch 46 to cut the molten parisons 2, 2, 2 respectively, the molten parisons 2, 2, 2 are always cut into a constant state, for example, the same constant length. be able to. As a result, it is possible to easily monitor the cutting length of each molten parison 2, 2 and 2 and to control the feedback by the data processing. Further, since the cutting start position of the cutter 48 is always positioned at the position shown by the solid line in FIG. 5 by the cutter positioning mechanism 50, the effect of always cutting each molten parison 2, 2, 2 into the same constant length is promoted. It

Substantially at the same time as the cutting of each of the molten parison 2, 2, 2, the die head 19 side of the extruder main body 13 of the extruder 10 is provided with a pair of hinges 31, 31 by a vertical drive mechanism 30, as shown in FIG. It rotates upward as a center and rises. As a result, when the pair of open / close dies 8, 8'rotates to the next station B, the molten parisons 2, 2, 2 being extruded from the pair of open / close dies 8, 8'and the die head 19.
And will not interfere. When the pair of open / close dies 8, 8'rotates to a position where the molten parison 2, 2, 2 being extruded does not interfere with each other, the die head 19 side of the extruder body 13 of the extruder 10 is moved to the position shown in FIG. , A pair of hinges 3
1, 31 as a center, the rod 38a of the hydraulic cylinder 38 of the up-and-down drive mechanism 30 retreats downward to rotate and descend, and when the next pair of opening and closing dies 8, 8'stops at the station A, each melting occurs. The molten parison 2, 2, 2 is continuously extruded from the die head 19 so that the parison 2, 2, 2 is extruded to a predetermined length.

Next, the AC servomotor 64 is driven to repeat intermittent rotation and stop from the station B to the station E at intervals of 60 ° with the pair of opening and closing molds 8 and 8'closed. A pair of open / close dies 8,8 '
Compressed air is blown into each of the above-mentioned molten parisons 2 sandwiched between a pair of open / close molds 8, 8'by a blow needle (not shown) built in, and blow molded into a predetermined shape in a hollow shape. The molded product 2'is cooled in the pair of open / close molds 8, 8 '.

In this pair of open / close molds 8 and 8 ', since the blower for compressed air is not a blow pin but a blow needle,
The blow-pin cannot take out the molded product 2 '. Therefore, at the station B, the upper ends 2a, 2a, 2a of the respective molten parisons 2, 2, 2 before solidification, which slightly project from the upper surfaces of the pair of opening / closing dies 8, 8 ', are connected to the pair of burr shape correcting mechanisms 70. The upper ends 2a, 2 of the molten parison 2, 2, 2 are clamped by the clampers 76, 76 of
A and 2a are corrected to a flat upright state so that the molded product 2'can be easily taken out from the pair of open / close molds 8 and 8'by a molded product take-out device 80 described later.

Further, in each section from the station A to the station F, the turntable 7 having a large diameter (for example, 2700 mm) and a heavy weight (about 10 tons) includes an AC servo motor 64, a drive gear 66, a pair of idle gears 62, 62. , A turntable driving device including a driven gear 61 and the like intermittently rotates at high speed (for example, 2.5 seconds) (for example, 60 °).
(The section is rotated for 1.6 seconds and stopped for 0.9 seconds), and the pair of opening / closing dies 8, 8'is sequentially rotated intermittently. Further, a pair of idle gears 62, 6 are provided between an annular driven gear 61 fixed to the outer periphery of the turntable 7 and a drive gear 66 that transmits the rotation of the AC servomotor 64.
Since 2 is interposed, backlash between gears can be eliminated. As a result, the turntable 7 can be rotated and positioned more accurately when stopped.

When the pair of opening / closing molds 8 and 8 ′ come to the station F, the pair of chucks 85 and 86 of the upper burr gripping and taking-out mechanism 81 of the molded product taking-out device 80 have already descended, so that the pair of opening and closing molds are made. A molded product 2'projected from the upper surface of 8, 8'and corrected to a flat upright state by a burr shape correction mechanism 70
The upper burr 2a 'is attached to each chuck piece 89 of the chuck 85.
And chuck it. Almost at the same time as this gripping, the hydraulic cylinder 115 operates the mold clamping device 100 to open the pair of open / close molds 8 and 8 '. Then, the rod 82a of the air cylinder 82 of the upper burr gripping / unloading mechanism 81 is retracted to raise the pair of chucks 85, 86 to the suction gripping / transporting mechanism 90. When the molded product 2'has been lifted by the upper burr gripping and taking out mechanism 81, as shown in FIG. 11, each suction pad 96 provided on one arm 91 of the suction and gripping and conveying mechanism 90 is molded as described above. The lower portion of the pair of chucks 85, 86 of the upper burr 2a 'of the product 2'is securely sucked by vacuum, and the body 2b' is held by the pair of gripping pieces 97, 97 without shaking the molded product 2 '. Hold securely. Next, the arm 91 moves to the motor 92.
Thus, the finished molded product 2 ′ is stored in the molded product storage container 68 by rotating 180 ° to release the suction and grip state.

The opening of the pair of open / close molds 8 and 8'by the mold clamping device 100 is performed by moving (returning) the connecting plate 112 in the direction opposite to the mold clamping. The pivot shaft 107 of the swing lever 105 of the mold clamping device 100 has a pair of guide shafts 10.
This axis 1 is located below the height of 1, 101 and
07 to the intermediate link 1 at the other end of the clamp rod 104 '
The distance from the pin pivot point of 08 and the distance from the pivot axis 107 to the pin pivot point of the intermediate link 111 of the slide rod 110 are equal, and the position of the pair of guide shafts 101 and the position of the upper surface of the base plate 9 are the same. Since the pivot shaft 107 is provided in the middle of, the mold clamping force of the mold clamping device 100 can be evenly divided between the pair of guide shafts 101, 101 and the base plate 9,
There is no unreasonable load applied to the base plate 9 or the like. The open / closed state of the pair of open / close molds 8 and 8'is determined by the first link 1
The toggle mechanism 120, which has a simple structure including the second link 123 and the second link 123, can be securely held.

Further, when the screw 16 of the extruder 10 is extracted for cleaning after the blow molding by the rotary blow molding machine 1 is completed, as shown by a two-dot chain line in FIG. The extruder main body 13 can be rotated by a predetermined angle by the rotation drive mechanism 20. As a result, the extruder body 13 does not interfere with the mold clamping device 100 and the like, and the screw 16 and the like can be easily cleaned. Also, since the extruder main body 13 is of a swivel type,
The installation space of the rotary blow molding machine 1 can be saved.

According to the above-described embodiment, the extruder 10 of the rotary blow molding machine 1 is driven by the vertical drive mechanism 30 to form a pair of hinges 31 and 3.
Although the extruder 10 is provided so as to be vertically movable around the center, the extruder 10 is not limited to this, and the extruder 1 according to another embodiment shown in FIG.
Like 0 ', the position of the pair of hinges 31', 31 'may be substantially the same as the height of the die head 19 (on the same horizontal plane) via the inverted V-shaped frame 3. This allows
Vibration of the die head 19 and misalignment of the parison 2 can be reliably solved. Since the other structure is the same as that of the above-described embodiment, the same reference numerals are given and detailed description thereof will be omitted.

〔The invention's effect〕

As described above, according to the present invention, in the rotary blow molding machine, the extruder can be horizontally swung with respect to the turntable by the swivel drive mechanism. It can be easily rotated, and the extruder and the mold on the turntable do not interfere,
The extruder can be easily cleaned. In addition, it is possible to save the installation space of the rotary blow molding machine.

[Brief description of drawings]

FIG. 1 is a plan view of a rotary blow molding machine showing an embodiment of the present invention, FIG. 2 is a side view of an extruder of the blow molding machine, FIG. 3 is a front view of the extruder, and FIG. Is the rear view of the extruder,
FIG. 5 is a plan view of the parison cutting device of the blow molding machine,
6 is a sectional view taken along the line VI-VI in FIG. 5, FIG. 7 is a side view showing a part of the parison cutting device in section, and FIG. 8 is a side view of the mold clamping device of the blow molding machine. 9 is a front view of the burr shape correcting mechanism of the blow molding machine, FIG. 10 is a plan view of the burr shape correcting mechanism, FIG. 11 is a side view of a molded product take-out device of the blow molding machine, and FIG. The figure is a side view of the upper burr gripping and removing mechanism of the molded product removing device of the blow molding machine, FIG. 13 is a sectional view taken along line XIII-XIII in FIG. 12, and FIG. 14 is a front view of the same burr gripping and removing mechanism. FIG. 15 is a plan view of the suction gripping and conveying mechanism of the molded product removing device, FIG. 16 is a side view of the suction gripping and conveying mechanism, FIG. 17 is a front view of the suction gripping and conveying mechanism, and FIG. FIG. 19 is an enlarged side view of the mold clamping device of the blow molding machine, and FIG. 19 is a side view of the extruder of another embodiment. 1 ... Rotary blow molding machine, 2 ... (melting) parison,
7 ... Turntable, 8, 8 '... (a pair of open / close) dies, 10 ... Extruder, 20 ... Rotating drive mechanism.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsushi Sugiyama 6-45-5 Higashikasai, Edogawa-ku, Tokyo Dormy Kasai ▲ III ▼ No. 210

Claims (1)

[Claims] 1. A rotary blow molding machine in which a turntable having a plurality of molds for sandwiching the parison and performing blow molding is rotatably disposed below an extruder for extruding the parison. A rotary blow molding machine, wherein the extruder is provided with a turning drive mechanism for turning the extruder horizontally with respect to a table.