TWI763919B - Blow molding device - Google Patents

Abstract

The present invention provides a blow molding apparatus including a conveying mechanism capable of easily changing a conveying path and the like. The blow molding apparatus (1) is provided with: a first robot (31) that takes out a preform (3) from a heated preform take-out position (16) and sends it to a primary blow-molding position (23); a second robot (32), which takes the primary blow-molded bottle (3A) from the primary blow-molding position (23) and feeds it into the secondary blow-molding position (24); and a third robot (33), which takes the secondary blow-molding position (24) The moulded bottle (3B) is taken out of the secondary blow moulding position (24) and fed into the bottle recovery position (62). The first, second, and third robots ( 31 to 33 ) are horizontal articulated robots, respectively. Changes in distances between adjacent positions, changes in height positions, and the like due to changes in process work can be easily handled without changing hardware.

Description

Blow molding device

The present invention relates to a blow molding apparatus, and more particularly, to a blow molding apparatus provided with a novel conveying mechanism for conveying a preform before blow molding and a molded article after blow molding.

A blow molding apparatus performs blow molding or stretch blow molding on a bottomed cylindrical preform (injection molded product) made of a thermoplastic resin such as PET, except for the mouth, to produce a bottle-shaped container, etc. Blow-molded products. For example, the blow molding apparatus includes: a supply unit for supplying a preform; a heating unit for the preform; a blow molding die for performing biaxial stretch blow molding on the heated preform; A collection unit that collects blow-molded containers; and a conveying mechanism that conveys preforms and blow-molded containers via them. In a blow molding apparatus such as a beverage bottle, for example, a blow molding bottle having high heat resistance is produced by performing double blow molding in which a preform is blown into a predetermined size, and the obtained single blow molding is performed. The blow molded container is heat shrunk and then blow molded again.

In the above blow molding apparatus, the mouth of the preform or the blow-molded container is attached to a transfer tool such as a mandrel in an upright position or an upside-down position, and in this state, the preform or the blow-molded container is moved by a conveyor belt or a chain. The transfer tool is transported along a predetermined transport path. In addition, the preform is transferred from the conveying path for heating to the blow molding using a conveying arm that can move linearly in the conveying direction and its orthogonal direction, or a swiveling conveying arm that can turn around a horizontal axis or a vertical axis. Conveyor for molding, etc. Patent Documents 1, 2 and the like describe blow molding apparatuses having the above-described conveyance mechanism. [Prior Art Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2012-229114 Patent Document 2: Japanese Patent Laid-Open No. 2008-302707

[Problems to be Solved by Invention]

In the blow molding apparatus, there are a supply position of the preform, a transfer position for transferring the heated preform from the heating section to the conveying path for blow molding, and blow molding in each blow molding die. fixed position, etc. The moving path of the transfer tool or the transfer arm for conveying the preform and the like via the above-described respective positions is also constant. When producing blow-molded products of different sizes, for example, if the height position of the mouth is changed, the height position of the conveying path of the transfer tool and the moving path/feed pitch of the conveying arm need to be adjusted accordingly. etc. to make changes. Also, when another processing unit or the like is added to the conveyance route, the conveyance route or the like needs to be changed significantly.

An object of the present invention is to provide a blow molding apparatus including a conveying mechanism capable of easily changing the conveying path and the like. [means to solve the problem]

In order to solve the above-mentioned problems, the blow molding apparatus of the present invention is characterized by comprising: a first robot that takes out a preform from a heated preform take-out position and sends it to a blow-molding position; a second robot that blows a preform A molded product is taken out from a blow molding position and sent to a molded product recovery position; and a blow molding die that blow-molded a preform at the blow molding position to form a blow molded product, a first robot, a first robot The 2 robots are respectively a horizontal articulated robot, and the horizontal articulated robot has: a first horizontal gyroscopic arm, which revolves around the first vertical axis; The vertical axis is the center for turning; the lifting shaft is mounted on the second horizontal turning arm and can be raised and lowered in the vertical direction; The mouth part is clamped, attached to the lift shaft, and opened and closed in the horizontal direction.

The blow molding apparatus to which the present invention is applied and which performs double blow molding to manufacture a heat-resistant bottle or the like is characterized by having: a first robot that takes out a preform from a heated preform take-out position and feeds it once Blow molding position; 2nd robot, which takes the primary blow molding from the primary blow molding position and feeds it into the secondary blow molding position; 3rd robot, which removes the secondary blow molding from the secondary blow molding The molding position is taken out and sent to the molding recovery position; the primary blow molding mold, which performs the primary blow molding of the preform at the primary blow molding position to form the primary blow molding product; and the secondary blow molding mold, It performs secondary blow-molding on the primary blow-molded product at the secondary blow-molding position to form a secondary blow-molded product. The first robot, the second robot, and the third robot are horizontal multi-joint robots, respectively. The articulated robot is provided with: a first horizontal swing arm that swings around the first vertical axis; a second horizontal swing arm that is attached to the first horizontal swing arm and swings around the second vertical axis; an elevating axis that swings around the second vertical axis Attached to the second horizontal swing arm, which can be raised and lowered in the vertical direction; and a jig for performing primary or secondary blow molding on a preform, a primary blow-molded product, or a secondary blow-molded product The part of the mouth part is clamped, mounted on the lifting shaft, and can be opened and closed in the horizontal direction.

Preforms (blanks) are delivered between adjacent positions by the horizontal articulated robots that are respectively arranged between the positions. The adjacent positions only need to be within the movable range of the gripper of the horizontal articulated robot. The transport path of the gripper, ie the movement path of the preform or blow-molded product, between adjacent positions is not uniquely fixed or defined. Changes in the distance between adjacent positions, height positions, etc. caused by changes in process work can be easily handled without changing the hardware. That is, each horizontal articulated robot can be used as it is, and it is only necessary to change the movement path of the above-mentioned jig by teaching operation.

In the blow molding apparatus of the present invention, the heated preform removal position, the primary blow molding position, and the secondary blow molding position can be arranged on the same straight line at predetermined intervals. In this case, it is preferable that the primary blow molding die and the secondary blow molding die are respectively opening and closing molds, the vertical opening and closing center lines of the opening and closing molds are located on one side of the orthogonal direction perpendicular to the straight line, and the opening and closing molds are preferably opened and closed. The other side in the orthogonal direction is opened and closed with the vertical opening and closing center line as the center. In addition, each of the first robot, the second robot, and the third robot is preferably arranged such that the first vertical axis of the first horizontal swing arm is located on the straight line, and the jig is performed on the opening and closing side of the mold opening and closing with respect to the straight line. move.

As a result, the operation of changing the molds of the blow molding molds and the like can be performed from the same side, so that the replacement is easy. In addition, if the positions are arranged at the same interval, the robots of the same specifications can be used as the robots, and the moving paths of the jigs can be the same. Therefore, the system structure is simplified.

In the blow molding apparatus of the present invention, a preform or blow-molded product is conveyed between positions using a horizontal articulated mold robot. The movement path between the respective positions can be arbitrarily set within a predetermined range, and the conveyance can be temporarily stopped at any position in the middle of the movement. Therefore, the quality of the preform or the blow-molded product can be determined by temporarily stopping the conveyance in the middle of the conveyance, and the defective product can be excluded. Alternatively, it is possible to determine the quality of the preform or blow-molded product passing at a predetermined conveying speed, and to exclude defective products. That is, it is possible to arrange a first defective product discharge portion, a second defective product discharge portion, and a third defective product discharge portion that judges the quality of the preform conveyed by the first robot, In the case of a defective product, the defective product is discharged, and the second defective product discharge unit judges whether the primary blow-molded product conveyed by the second robot is good or not, and in the case of a defective product, the defective product is discharged, The third defective product discharge unit judges the quality of the secondary blow-molded product conveyed by the third robot, and when it is a defective product, discharges the defective product.

In the blow molding apparatus of the present invention, the produced blow-molded product can also be easily packaged. In this case, the collection box which collects the said secondary blow-molded product sent out by the said 3rd robot is arrange|positioned so that the said molded product collection|recovery position may be a position in the said collection box. Furthermore, by relatively moving the collection box and the molded product collection position of the third robot, the secondary blow-molded products can be collected in the collection box in a line-up state.

Moreover, the heating part which heats a preform to the temperature suitable for blow molding is arrange|positioned in a blow molding apparatus. In this case, a preform supply position to which a preform before heating is supplied, a conveying mechanism, and a heating section are arranged, and the conveying mechanism passes through the preform supply position and the heating preform. The circulation path at the product take-out position conveys the preforms, and the heating unit heats the preforms conveyed along the circulation path.

In this case, it is preferable that the conveying mechanism includes a rotary table that transports the preforms along a circular circulation path, and a transport motor that rotates the rotary table, and the heating unit includes a plurality of heaters. part, the plurality of heating parts are arranged at predetermined intervals in the circulation path part from the preform supply position to the heated preform extraction position, and the heating parts are each provided with a motor for autorotation, and the motor for autorotation drives the heating part from the heating part. The preform passing through the heating position rotates about its central axis.

For example, the conveying mechanism includes a rotary disc that conveys the preforms along a circular conveyance path at a predetermined feed pitch, and a conveying servo motor that rotates the disc at predetermined intervals at the feed pitch. The rotation is intermittently performed, and the heating unit is provided with a plurality of heating units arranged at the same interval as the feeding pitch in the circulation path portion from the preform supply position to the heated preform extraction position, and each heating unit is provided with an autorotation function. A servo motor for autorotating the preform fed to the heating position of the heating unit about its central axis. In this case, the preform is intermittently conveyed along the circulation path by the conveyance motor, and independently of this, the preform is autorotated by the autorotation motor alone in each heating section. The speed of intermittent conveyance of the preform, the residence time of the preform in each heating section, and the rotation speed in each heating section can be freely set according to the shape and thickness of the preform to be heated. Therefore, the optimum heating state of the preform can be efficiently formed.

Moreover, as a heating part, the external heating part, such as a heater which heats a preform from the outside, is arrange|positioned. In some cases, a heat generating body such as a rod heater may be inserted through the mouth of the preform, and an internal heating portion that heats the preform to a predetermined temperature from the inside may be arranged. Both the external heating unit and the internal heating unit may be arranged. In the case of using the internal heating unit of the rod heater, for example, a mechanism that enables the rod heater to be transferred from the rotary table to the rotary table for transporting the preforms along a circular circulation path is attached. The upper part is inserted into the preform through a central axis for rotation that causes the preform to rotate.

Hereinafter, an embodiment of a blow molding apparatus to which the present invention is applied will be described with reference to the drawings. In Embodiment 1 described below, the present invention is applied to a double blow molding apparatus for manufacturing a heat-resistant beverage bottle or the like, but the present invention is not limited to a double blow molding apparatus. As shown in Embodiment 2 ( FIG. 5 ) to be described later, it can be similarly applied to a blow molding apparatus that performs blow molding once. In addition, the same can be applied to a blow molding apparatus that performs blow molding three or more times.

(Embodiment 1) Fig. 1(a) is a front view showing a blow molding apparatus in this embodiment, Fig. 1(b) is a right side view thereof, Fig. 1(c) is a left side view thereof, and Fig. 1(d) It is a plan view showing its internal structure. FIG. 2 is an enlarged plan view showing the internal structure of the blow molding apparatus.

In the blow molding apparatus 1, each structural part is arrange|positioned inside the apparatus case 2 of the horizontally long rectangular parallelepiped shape. A supply rail 4 (chute) for a preform 3 that is a bottomed cylindrical injection-molded product is arranged on the right side of the front surface of the device casing 2 ( FIGS. 1( a ), ( c ) ), the supply rail 4) is omitted. The supply rail 4 is inclined downward toward the device casing 2 . As shown in FIG. 3 to be described later, the preform 3 includes a bottomed cylindrical body portion 3a and a mouth portion 3b formed at a distal end of the body portion 3a, and a male thread is formed on the outer peripheral surface of the mouth portion 3b. The preform 3 is supplied to the supply rail 4 in a state where the mouth portion 3b is suspended from a supply source (not shown). The preform 3 slides down along the supply rail 4 by its own weight, and enters the inside of the apparatus casing 2 .

Inside the apparatus casing 2, the heating station 10 of the preform 3 is arranged on the right side. On the left side of the heating station 10, a double blow molding station 20 is arranged. The front side of the blow molding station 20 is the defective product disposal station 50 . To the left of the blow molding station 20 is a bottle recycling station 60 . A control panel 5 that controls the drive of each part is arranged at a portion on the left side of the front surface of the device casing 2 . A display screen, various operation buttons, and the like are arranged on the control panel 5 . The blow molding operation and the like are performed in a predetermined order.

The heating station 10 includes a rotary disk 11 for conveying a preform, and a transport motor such as a servo motor 12 that drives the rotary disk 11 to rotate around the center. The preform conveying tool 13 is attached to the outer peripheral edge of the rotary disk 11 at predetermined angular intervals. In the example shown in the figure, the preform conveying tools 13 are arranged at eight positions at equal intervals. Accompanying the rotation of the rotary disk 11, the preform conveying tool 13 circulates along the circular circulation path 14 shown by the dashed-dotted line. A portion of the circulation path 14 on the front side of the apparatus casing 2 is a preform supply position 15 , and the preform 3 is fed from the supply rail 4 to the preform supply position 15 . The mouth portion 3 b of the preform 3 is handed over to the preform conveying tool 13 at the preform supply position 15 from the side of the supply rail 4 . The preform 3 is conveyed along the circulation path 14 in a state in which the mouth portion 3b is suspended in accordance with the rotation of the rotary disk 11 .

In the circulation path 14 , a position rotated counterclockwise by 270° in the figure from the preform supply position 15 is a heated preform take-out position 16 . In the circulation path portion of the circulation path 14 from the preform supply position 15 to the heated preform removal position 16 , heating units 17 are arranged at a plurality of positions at equal angular intervals, in this example, five heating units 17 . The heating unit 17 is arranged at the position. Each heating unit 17 has the same structure, and includes a heater extending in the tangential direction on the outer peripheral side of the circulation path 14 . Moreover, the motor for autorotation, for example, the servomotor 18, for autorotating the preform 3 sent to the heating position of each heating unit 17 is provided.

The preforms 3 heated in the heating station 10 to a temperature suitable for blow moulding are handed over to the blow moulding station 20 at the heated preform extraction location 16 . In the blowing station 20 , a primary blow molding die 21 is arranged on the side of the heating station 10 , and a secondary blow molding die 22 is arranged on the side of the bottle recovery station 60 . At the primary blow molding position 23 of the primary blow molding die 21 , the primary blow molding is performed on the preform 3 to obtain a primary blow molding bottle 3A as a primary blow molding product. The primary blow-molded bottle 3A is subjected to secondary blow molding at the secondary blow molding position 24 of the secondary blow molding die 22 to obtain a secondary blow molded bottle 3B as a secondary blow molded product. In this example, the secondary blow-molded bottle 3B is the bottle of the final product.

The first robot 31 for conveying the preform is arranged between the heated preform taking-out position 16 and the primary blow molding position 23 of the primary blow molding die 21 . Between the primary blow molding position 23 of the primary blow molding die 21 and the secondary blow molding position 24 of the secondary blow molding die 22, there is arranged a device for transferring the primary blow molding bottle 3A from the primary blow molding position 23 The second robot 32 is transported to the secondary blow molding position 24 . In addition, between the secondary blow molding die 22 and the bottle recovery station 60, there is disposed a bottle recovery station 60 for conveying the secondary blow molded bottle 3B from the secondary blow molding position 24 to the bottle recovery station 60 as a molded product recovery position. The third robot 33 in the bottle collection position 62 . The above-mentioned first, second, and third robots 31 to 33 are all horizontal articulated robots, and in this example, robots of the same specification are arranged.

3(a), (b), and (c) are a plan view, a front view, and a side view showing the horizontal articulated robots used as the first to third robots 31 to 33, and FIG. 3(d) shows the Top view of the fixture.

The horizontal articulated robot 40 includes a gantry 41, and a first horizontal swing arm 43 is mounted on the gantry 41 in a state capable of swinging about the first vertical axis 42 as a center. A second horizontal swing arm 45 is mounted on the front end portion of the first horizontal swing arm 43 in a state where it can swing around the second vertical axis 44 . A lift shaft 46 that can be vertically moved up and down is mounted on the front end portion of the second horizontal swing arm 45 . A clamp 47 that can be opened and closed in the horizontal direction is mounted on the lower end portion of the elevating shaft 46 extending downward from the second horizontal swing arm 45 . The preform 3 , the primary blow-molded bottle 3A, or the portion of the mouth portion 3 b of the secondary blow-molded bottle 3B as the final product can be clamped by the clamp 47 .

Referring again to FIG. 2 , the heated preform extraction position 16 , the primary blow molding position 23 , and the secondary blow molding position 24 are located at the same intervals on the straight line 6 shown by the dashed-dotted line. In addition, the primary blow molding die 21 and the secondary blow molding die 22 are each constituted by a pair of left and right opening and closing dies. The opening/closing center of each opening/closing mold is located on one side (rear side in this example) of the direction orthogonal to the straight line 6 , and the opening/closing side is located on the other side (front side).

In addition, the first, second, and third robots 31 to 33 are respectively arranged so that the first vertical axis 42 of the first horizontal swing arm 43 is positioned on the straight line 6 , and the jig 47 opens and closes the mold with respect to the straight line 6 . move. In this example, the first robot 31 (its first vertical axis 42 ) is located in the middle of the heated preform taking-out position 16 and the primary blow-molding position 23 . Likewise, the second robot 32 (its first vertical axis 42 ) is located in the middle of the primary blow molding position 23 and the secondary blow molding position 24 .

In the defective product disposal station 50 , defective product determination units 51 to 53 are arranged at positions on the front side of the apparatus casing 2 of the first to third robots 31 to 33 , respectively. For each of the first to third robots 31 to 33 , the preform 3 held by the gripper 47 in a state in which the first and second horizontal swing arms 43 and 45 extend linearly on the front side, one blow molding The molded bottle 3A and the secondary blow molded bottle 3B are positioned at the judgment positions of the defective product judgment sections 51 to 53 . The preform 3, the primary blow-molded bottle 3A, and the secondary blow-molded bottle 3B that are judged to be defective by the defective product determining units 51 to 53 are released from the grip by the clamp 47, dropped from the clamp 47, and collected. Go to the disposal box 54 of the defective product disposal station 50 located on the lower side.

Moreover, the bottle recovery box 61 is arrange|positioned in the bottle recovery station 60. As shown in FIG. The bottle collection box 61 is arranged, for example, in a state capable of moving in the front-rear direction or the left-right direction of the apparatus casing 2 . The bottle recovery position 62 of the secondary blow-molded bottle 3B conveyed by the third robot 33 can be set at a fixed position. In this case, the recovered secondary blow-molded bottles 3B can be recovered in the bottle recovery box 61 in a line-up state by moving the bottle recovery box 61 forward, backward, left and right using, for example, a not-shown biaxial table. Alternatively, as shown in the figure, when the movable range of the gripper 47 of the third robot 33 includes the entire width of the bottle collection box 61 , the third robot 33 communicates with the third robot 33 by moving the bottle collection box 61 in the left-right direction. The movement of the bottle recovery position 62 in the forward and backward directions is performed in synchronization, and the secondary blow-molded bottles 3B can be recovered in the bottle recovery box 61 in a queued state.

Next, the bottle molding operation by the blow molding apparatus 1 having the above-described configuration will be collectively described. First, the preform 3 is dropped along the supply rail 4 in a state of being suspended from the supply rail 4 , and is sent to the preform supply position 15 . The preforms 3 sent to the preform supply position 15 are handed over to the preform conveying means 13 of the rotating disk 11 waiting here. In this state, the conveying servo motor 12 rotates the rotary disk 11 at a constant feed pitch (a constant angle), and the preform 3 is positioned along the circulation path 14 at the first heating unit 17 . heating position. In the heating unit 17, the preform 3 is rotated (autorotated) around its central axis by the servomotor 18 for autorotation. The autorotating preform 3 is heated from the outside by a heater. When the preform 3 is internally heated, a rod heater is inserted into the preform through the mouth of the rotating preform 3 from the upper part of the turntable, and the preform 3 is heated from the inside to a predetermined level. temperature. After the preform 3 is heated in the same manner in each heating unit 17 , it is sent out to the heated preform taking-out position 16 .

The heated preform 3 is sent from the heated preform extraction position 16 to the primary blow molding position 23 of the primary blow molding die 21 in the open state by the first robot 31 . The first robot 31 is temporarily stopped at the defective product determination unit 51 in the middle of conveying, and the quality of the mouth portion 3 b of the preform 3 and the like are determined. While the preforms 3 conveyed by the first robot 31 are passing through the judgment position of the defective product determination unit 51 at a predetermined speed, the defective product determination unit 51 may perform a quality determination of the passed preforms 3 . The preforms that are determined to be defective products by the defective product determination unit 51 are collected into the discard box 54 of the defective product discarding station 50 .

When the preform 3 is sent to the primary blow molding position 23 , the primary blow molding die 21 is clamped, and blow molding, for example, biaxial stretch blow molding, is performed on the preform 3 . Thereby, the primary blow-molded bottle 3A as a primary blow-molded product is obtained from the preform 3 . After the primary blow molding mold 21 is opened, the second robot 32 sends the primary blow molding bottle 3A from the primary blow molding position 23 to the secondary blow molding position of the secondary blow molding mold 22 in the opened state. twenty four. The primary blow-molded bottle 3A is shrunk due to heat generation during transportation, the density is increased, and heat resistance is imparted. The second robot 32 is temporarily stopped at the defective product determination unit 52 in the middle of conveyance, and the defective product determination unit 52 determines whether the primary blow-molded bottle 3A is good or not. While the primary blow-molded bottle 3A conveyed by the second robot 32 passes through the determination position of the defective product determination unit 52 at a predetermined speed, the defective product determination unit 52 may check whether the passing primary blow molded bottle 3A is good or not. determination. The primary blow-molded bottle 3A judged to be a defective product is collected in the discard box 54 of the defective product discarding station 50 .

The primary blow-molded bottle 3A in a predetermined thermally shrunk state sent to the secondary blow-molding position 24 is secondary blow-molded by the post-clamped secondary blow-molding mold 22 . Thereby, the secondary blow-molded bottle 3B of the predetermined size as a secondary blow-molded product is obtained. After the secondary blow molding die 22 is opened, the secondary blow molding bottle 3B is sent out from the secondary blow molding position 24 to the bottle recovery position 62 by the third robot 33 and placed in the bottle recovery box 61 . In addition, the third robot 33 is temporarily stopped at the defective product determination unit 53 in the middle of conveying, and the quality is determined. It is also possible to judge whether the secondary blow-molded bottle 3B is good or bad while passing through the judgment position at a predetermined speed without temporarily stopping the secondary blow-molded bottle 3B at the judgment position of the defective product judgment section 53 . The secondary blow-molded bottle 3B judged to be a defective product is collected in the waste box 54 .

(Modification of Embodiment 1) FIG. 4 is an explanatory diagram showing a modification of the blow molding apparatus 1 described above. The blow molding apparatus 100 shown in this figure has the same basic structure as the blow molding apparatus 1 described above, and includes a heating station 110 for preforms 103 , a double blow molding system blow molding station 120 , and a bottle recovery station 160 . In this example, the preforms 103 are heated while intermittently conveying the preforms 103 two by two in the heating station 110 . Therefore, two preform conveyance tools 113 are respectively arranged at equal angular intervals along the outer peripheral edge of the rotary disk 111 for preform conveyance. In addition, in the blow molding station 120, two rows of blow molding lines are configured in a state of front-back symmetry.

The 2-row blow molding production line has a front-to-back symmetrical structure. In the blow molding line on the rear side, in the heating station 110, between the heated preform take-out position 116A on one side and the primary blow molding position 123A of the primary blow molding die 121A, a preform conveying position is arranged. The first robot 131A. Between the primary blow molding position 123A of the primary blow molding mold 121A and the secondary blow molding position 124A of the secondary blow molding mold 122A, there is arranged a device for transferring the primary blow molding bottle 103A1 from the primary blow molding position 123A The second robot 132A is transported to the secondary blow molding position 124A. In addition, between the secondary blow molding die 122A and the bottle recovery station 160, a second bottle recovery position 162A for conveying the secondary blow molded bottle 103A2 from the secondary blow molding position 124A to the bottle recovery station 160 is arranged. 3 Robot 133A. The first, second, and third robots 131A, 132A, and 133A described above are all horizontal articulated robots.

The blow molding line on the front side is also constructed in the same manner, and the first robot 131B for conveying the preform is arranged between the heated preform take-out position 116B and the primary blow molding position 123B of the primary blow molding die 121B. . Between the primary blow-molding position 123B of the primary blow-molding mold 121B and the secondary blow-molding position 124B of the secondary blow-molding mold 122B, there is arranged a device for transferring the primary blow-molded bottle 103B1 from the primary blow-molding position 123B The second robot 132B is transported to the secondary blow molding position 124B. Between the secondary blow molding die 122B and the bottle recovery station 160, a third robot for transporting the secondary blow molded bottle 103B2 from the secondary blow molding position 124B to the bottle recovery position 162B of the bottle recovery station 160 is arranged 133B. The first, second, and third robots 131B, 132B, and 133B described above are all horizontal articulated robots.

In this way, by heating the preforms two by two and supplying them to the blow molding lines of two rows, respectively, and blow molding, there are advantages that the increase in the installation space can be kept to a minimum. limit, and the processing speed can be increased. In addition, since the specific structure of each part is the same as that of the case of Embodiment 1, their description is abbreviate|omitted.

(Embodiment 2) FIG. 5 is an explanatory diagram showing an example of a blow molding apparatus formed by a single blow molding method to which the present invention is applied. The blow molding apparatus 200 of this example is provided with the heating station 210 of the preform 203, the blow molding station 220 of the single blow molding method, and the bottle recovery station 260. In addition, it includes: a first robot 231 that takes out the preform 203 heated to a temperature suitable for blow molding from the heated preform taking-out position 216 and sends it to the blow-molding position 223; and a second robot 232, It takes out the blow-molded bottle 203A obtained by blow-molding the preform 203 from the blow-molding position 223 and sends it to the bottle recovery position 262 . The blow molding station 220 is provided with a blow molding die 221 for blow molding the preform 203 at the blow molding position 223 to mold the blow molding bottle 203A. The first and second robots 231 and 232 are respectively horizontal articulated robots, which are the same as in the first embodiment.

1‧‧‧Blow molding device 2‧‧‧Apparatus casing 3‧‧‧Preform 3A‧‧‧Primary blow molding bottle 3B‧‧‧Secondary blow molding bottle 3a‧‧‧Main body 3b‧‧ ‧Port 4‧‧‧Supply track 5‧‧‧Control panel 6‧‧‧Linear 10‧‧‧Heating station 11‧‧‧Rotating disc 12‧‧‧Servo motor 13‧‧‧Preform conveying tool 14‧ ‧‧Circulation path 15‧‧‧Preform supply position 16‧‧‧Heating preform take-out position 17‧‧‧Heating unit 18‧‧‧Servo motor 20‧‧‧Blow molding station 21‧‧‧One blow molding Mold 22‧‧‧Secondary Blow Molding Mold 23‧‧‧Primary Blow Molding Position 24‧‧‧Secondary Blow Molding Position 31‧‧‧First Robot 32‧‧‧Second Robot 33‧‧‧3rd Robot 40‧‧‧Horizontal Articulated Robot 41‧‧‧Stand 42‧‧‧First Vertical Axis 43‧‧‧First Horizontal Swing Arm 44‧‧‧Second Vertical Axis 45‧‧‧Second Horizontal Swing Arm 46 ‧‧‧Elevating shaft 47‧‧‧Clamp 50‧‧‧Defective product disposal station 51‧‧‧Defective product judgment part 52‧‧‧Defective product judgment part 53‧‧‧Defective product judgment part 54‧‧‧Defective product judgment part 60‧ ‧‧Bottle recycling station 61‧‧‧Bottle recycling bin 62‧‧‧Bottle recycling position 100‧‧‧Blow molding device 103‧‧‧Preform 103A1, 103B1‧‧‧One-shot blow molding bottle 103A2, 103B2‧‧ ‧Secondary blow molding bottle 110‧‧‧Heating station 111‧‧‧Rotating disc 113‧‧‧Preform conveying tool 116A, 116B‧‧‧Heating preform take-out position 120‧‧‧Blow molding station 121A, 121B‧‧‧First blow molding mold 122A, 122B‧‧‧Secondary blow molding mold 123A, 123B‧‧‧First blow molding position 124A, 124B‧‧‧Secondary blow molding position 131A, 131B‧‧‧ 1st robots 132A, 132B‧‧‧Second robots 133A, 133B‧‧‧3rd robots 160‧‧‧Bottle collection station 162A, 162B Molded product 203A‧‧‧Blow molding bottle 210‧‧‧Heating station 216‧‧‧Heating preform removal position 220‧‧‧Blow molding station 221‧‧‧Blow molding mold 223‧‧‧Blow molding position 224 ‧‧‧Bottle collection station 231‧‧‧1st robot 232‧‧‧2nd robot 260‧‧‧Bottle collection station 262‧‧‧Bottle collection position

1 is a front view, a right side view, a left side view, and a plan view showing an internal structure of a blow molding apparatus formed by a double blow molding method in Embodiment 1 to which the present invention is applied. Fig. 2 is an enlarged plan view showing the internal structure of the blow molding apparatus of Fig. 1 . Fig. 3 is a plan view, a front view, a side view, and a plan view showing an example of a horizontal articulated robot of the blow molding apparatus of Fig. 1, and a jig thereof. Fig. 4 is an explanatory diagram showing a blow molding apparatus formed by a double blow molding method in Embodiment 2 to which the present invention is applied. 5 is an explanatory diagram showing a blow molding apparatus formed by a single blow molding method in Embodiment 3 to which the present invention is applied.

1‧‧‧Blow molding device

2‧‧‧Device shell

3‧‧‧Preforms

3A‧‧‧One blow molding bottle

3B‧‧‧Secondary blow molding bottle

4‧‧‧Supply track

6‧‧‧Straight

10‧‧‧Heating Station

11‧‧‧Rotating disc

12‧‧‧Servo motor

13‧‧‧Preform conveying tool

14‧‧‧Circular Road

15‧‧‧Preform supply position

16‧‧‧Heating preform removal position

17‧‧‧Heating unit

18‧‧‧Servo motor

20‧‧‧Blow molding station

21‧‧‧One-shot blow molding mold

22‧‧‧Secondary blow molding mold

23‧‧‧One blow molding position

24‧‧‧Secondary blow molding position

31‧‧‧First Robot

32‧‧‧Second Robot

33‧‧‧The 3rd Robot

50‧‧‧Defective product disposal station

51‧‧‧Defective Product Judgment Department

52‧‧‧Defective Product Judgment Department

53‧‧‧Defective Product Judgment Department

54‧‧‧Disposal Box

60‧‧‧Bottle Recycling Station

61‧‧‧Bottle recycling bins

62‧‧‧Bottle recycling locations

Claims (8)

A blow molding apparatus including: a heating station for heating preforms; a blow molding station for blow molding preforms; a recycling station for recycling blow molded articles; and a first robot for The heated preform is taken out from the heated preform take-out position of the heating station and sent to the blow-molding position formed by the blow-molding mold in the open-mold state of the blow-molding station a second robot that takes out the blow-molded product obtained after blow-molding the preform from the blow-molding position formed by the blow-molding mold in the open state, and feeds it into the A molded product collection position of the collection station; and a control panel for driving and controlling the heating station, the blow molding station, the collection station, the first robot, and the second robot according to a preset The blow molding operation is performed in the set order, and the first robot and the second robot are respectively a horizontal articulated robot, and the horizontal articulated robot includes a first horizontal gyroscopic arm that performs the operation centering on a first vertical axis. a swing; a second horizontal swing arm mounted on the first horizontal swing arm and revolving around a second vertical axis; a lift shaft mounted on the second horizontal swing arm and capable of being vertically rotated and a jig for gripping a portion of the preform or the blow-molded mouth that is not subjected to the blow-molding, mounted on the elevating shaft, horizontally Open and close in the direction, and the movement path of the preform and the blow-molded product held by the respective grippers of the first robot and the second robot is controlled by the control panel. can be changed. A blow molding apparatus including: a heating station for heating preforms; a blow molding station for blow molding preforms; a recycling station for recycling blow molded articles; and a first robot for The heated preform is taken out from the heated preform take-out position of the heating station, and sent to the blow molding station in the open state of the primary blow molding formed by the primary blow molding die. A molding position; a second robot that blows a primary blow-molded product obtained by performing primary blow molding of the preform, from the primary blow-molded product formed by the primary blow-molding die in a mold-opened state The molding position is taken out and sent to the secondary blow molding position formed by the secondary blow molding mold in the open state of the blow molding station; the third robot, which carries out the primary blow molding. The secondary blow-molded product obtained after secondary blow molding is taken out from the secondary blow-molding position formed by the secondary blow-molding mold in an open state, and a collection position for moldings fed into the collection station; and a control panel for controlling the heating station, the blow molding station, the collection station, the first robot, the second robot, and the first robot 3. The robot is driven and controlled to perform blow molding operations in a preset sequence. The first robot, the second robot, and the third robot are respectively horizontal articulated robots. The horizontal articulated robot includes: a horizontal swing arm that swings around a first vertical axis; a second horizontal swing arm mounted on the first horizontal swing arm and swings around the second vertical axis; a lift shaft mounted on the the second horizontal swing arm, which can be raised and lowered in a vertical direction; and a jig for applying the preform, the primary blow-molded product, or the secondary blow-molded product to the unimplemented The first robot, the second robot, and the third The movement paths of the preform, the primary blow-molded product, and the secondary blow-molded product held by the respective grippers of the robot can be changed via the control panel. The blow molding apparatus according to claim 2, wherein the heated preform removal position, the primary blow molding position, and the secondary blow molding position extend in a horizontal direction of The straight lines are arranged at predetermined intervals, the primary blow molding die and the secondary blow molding die are respectively opening and closing molds, and the vertical opening and closing center lines of the opening and closing molds are located at: perpendicular to the horizontal direction with respect to the straight line. One side of the orthogonal direction of the opening and closing mold, the other side of the orthogonal direction of the opening and closing mold is opened and closed with the vertical opening and closing center line as the center, and the first robot, the second robot and the third robot are respectively configured as: The first vertical axis of the first horizontal swing arm is positioned on the straight line, and the jig moves on the opening/closing side of the opening/closing mold with respect to the straight line. The blow molding apparatus according to claim 3, wherein at least one of a first defective product discharge portion, a second defective product discharge portion, and a third defective product discharge portion is disposed, the first defective product discharge portion being The discharge unit judges whether the preform conveyed by the first robot is good or not, and if it is a defective product, the defective product is discharged, and the second defective product discharge unit is used for the preform conveyed by the second robot. The quality of the primary blow-molded product is judged, and in the case of a defective product, the defective product is discharged, and the third defective product discharge unit measures the quality of the secondary blow-molded product conveyed by the third robot. It is judged whether it is good or not, and if it is a defective product, the defective product is discharged. The blow molding apparatus according to claim 3, wherein the collection station includes a collection box that collects the secondary blow-molded products sent out by the third robot, so The said molded article collection|recovery position is a position in the said collection box, and the said collection box is arrange|positioned so that a movement is possible. The blow molding apparatus according to claim 3, wherein the heating station has: a preform supply position to which the preform before heating is supplied; A preform supply position and a circulation path of the heated preform extraction position to convey the preform; and a heating unit that heats the preform conveyed along the circulation path. The blow molding apparatus according to claim 6, wherein the conveying mechanism includes a rotary plate that conveys the preform along the circular circulation path, and a conveying motor, the A conveyance motor rotates the rotary disk, and the heating unit includes a plurality of heating units arranged at predetermined intervals from the preform supply position to the heated preform take-out position. In the circulation path part between the heating parts, the heating parts are respectively provided with motors for autorotation, and the motors for autorotation make the The preform passing through the heating position of the heating unit rotates about its central axis. The blow molding apparatus according to claim 6 or 7, wherein the heating unit includes one or both of an external heating unit and an internal heating unit, and the external heating unit heats the preform from the outside The preform is heated, and the internal heating unit heats the preform from the inside.

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