KR20190043462A - Blow molding apparatus - Google Patents

Abstract

The purpose of the present invention is to provide a blow molding apparatus including a conveyance mechanism which simply performs a change of a conveyance path or the like. The blow molding apparatus (1) includes: a first robot (31) which takes out a preform (3) from a heated preform taking-out position (16) and returns the preform (3) to a first blow molding position (23); a second robot (32) which takes out a first blow molded bottle (3A) from the first blow molding position (23) and returns the first blow molded bottle (3A) to a second blow molding position (24); and a third robot (33) which takes out a second blow molded bottle (3B) from the second blow molding position (24) and returns the second blow molded bottle (3B) to a bottle recovery position (62). The first, second and third robots (31-33) are each a horizontal articulated robot. The blow molding apparatus (1) can simply cope with a change in a distance between adjacent positions and the height of each of the adjacent positions, which is caused by replacement of a mold, without changing hardware.

Description

[0001] BLOW MOLDING APPARATUS [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blow molding apparatus and more particularly to a blow molding apparatus having a new transport mechanism for transporting a preform before blow molding and a molded article after a blow molding To a single-blow molding apparatus.

The blow molding apparatus is provided with a blow molding or stretch blow molding (injection molding) process in which a tubular preform (injection molded product) having a bottom made of a thermoplastic resin (thermoplastic resin) such as PET, Stretch blow molding) is carried out to produce a blow molded article (blow molded article) such as a bottle-shaped container. For example, the blow molding apparatus includes a supply section (supply section) to which a preform is supplied, a heating section (heating section) of the preform, and a blow molding (biaxial stretch blow molding) A blow molding die, a collecting section for collecting the obtained bottle-shaped blow molding container, and a transport mechanism for transporting the preform and the blow molding container through the mold. In a blow molding apparatus such as a drink bottle, for example, a double blow which blows a preform to a predetermined size, heat-shrinks the obtained primary blow molding container and then blows the same again is used To thereby produce a blow molding bottle having high heat resistance.

In such a blow molding apparatus, a preform or a blow molding container is attached to a conveying tool such as a mandrel in a standing posture or an inverted posture, , The conveying port is conveyed along a predetermined conveying path by a belt or a chain. Further, the preform can be transported for heating by using a transport arm that can move linearly in the transport direction and its perpendicular direction, or a pivotal transport arm (pivotal transport arm) that can pivot around a horizontal axis or a vertical axis (Heating conveying path) to a blow molding conveying path (blow molding conveying path) or the like. Such a blow molding apparatus having such a transport mechanism is described in Patent Documents 1 and 2 and the like.

: Japanese Unexamined Patent Application Publication No. 2012-229114 : Japanese Patent Application Laid-Open No. 2008-302707

In the blow molding apparatus, the feeding position (feeding position) of the preform, the feeding position (feeding position) for feeding the heated preform from the heating section to the blow molding conveying path, The blow molding position (blow molding position) and the like are in a fixed position. The moving path of the transporting or transporting arm for transporting the preform or the like via each of these positions is also constant. When the blow-molded article of different sizes is produced, for example, when the height of the bent portion is changed, the height of the conveying path of the conveying path, the conveying path of the conveying arm, It is necessary to change the pitch (movement channel / pitch) or the like. In addition, even when a separate processing section (processing section) is added on the conveyance path, a significant change in the conveyance path or the like is required.

SUMMARY OF THE INVENTION An object of the present invention is to provide a blow molding apparatus provided with a transport mechanism capable of simply carrying out such changes of a transport path.

In order to solve the above problems, the blow molding apparatus of the present invention comprises:

A first robot for taking the preform out of the heated preform take-out position and conveying the preform to a blow-

A second robot for taking the blow-molded article out of the blow molding position and transporting the blow-molded article to the molded article recovery position,

The preform is subjected to blow molding at the blow molding position, and a blow molding die for molding the blow molding product

However,

Each of the first and second robots is a horizontal articulated robot,

In the horizontal articulated robot,

A first horizontal swing arm pivoting about a first vertical axis;

A second horizontal swing arm attached to the first horizontal swing arm and pivoting about a second vertical axis,

An elevating shaft attached to the second horizontal swing arm and vertically movable up and down,

In order to grasp a portion of the preform or the blow-molded portion of the blow-molded article which is not subjected to blow molding, a gripper attached to the lifting shaft and opening /

And the like.

The blow molding apparatus for performing the double blow for producing a heat-resistant bottle or the like to which the present invention is applied,

A first robot for taking the preform out of the heated preform take-out position and conveying it to the primary blow molding position,

A second robot for taking the primary blow molded article out of the primary blow molding position and transporting the primary blow molded article to the secondary blow molding position,

A third robot for taking the second blow-molded article out of the second blow-molding position and transporting the second blow-molded article to the molded article recovery position,

A primary blow molding die for performing primary blow molding on the preform at the primary blow molding position and molding the primary blow molding product

A secondary blow molding is performed on the primary blow molded article at the secondary blow molding position to form a secondary blow molding mold for molding the secondary blow molded article

However,

Each of the first, second, and third robots is a horizontal articulated robot,

In the horizontal articulated robot,

A first horizontal swing arm pivoting about a first vertical axis;

A second horizontal swing arm attached to the first horizontal swing arm and pivoting about a second vertical axis,

An elevating shaft attached to the second horizontal swing arm and vertically movable up and down,

A gripper which is attached to the lifting shaft and opens and closes in the horizontal direction is used for gripping a portion of the preform, primary blow-molded product, or secondary blow-

And the like.

By the horizontal articulated robot disposed between the respective positions, the delivery of the preform (parison) is carried out between adjacent positions. It is good if the grips of the horizontal articulated robot are in a movable range so that the adjacent positions can enter. The conveying path of the gripper between the adjacent positions, that is, the movement path of the preform or the blow-molded article, is not fixed (unambiguously) or constrained. It is possible to easily cope with the change of the distance and the height between the adjacent positions by the mold replacement without changing the hardware. That is, each of the horizontal articulated robots can be used as it is, and the movement path of the gripper can be changed by a teaching operation.

In the blow molding apparatus of the present invention, the heated preform take-out 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, each of the primary blow molding metal mold and the secondary blow molding metal mold is divided into an openable and closable mold opening and closing the other side in the orthogonal direction about the vertical opening / closing center line located on one side in the direction orthogonal to the straight line . It is preferable that each of the first, second, and third robots is disposed such that the first vertical axis of the first horizontal swing arm is located on the straight line and the gripper moves on the open / close side of the opening / closing die with respect to the straight line Do.

This is convenient because it is possible to carry out the mold replacement operation of each blow molding die from the same side. If the respective positions are arranged at the same interval, robots of the same standard can be used as the respective robots, and the movement paths of the grippers can be made the same. Therefore, the system configuration becomes easy.

In the blow molding apparatus of the present invention, a preform or a blow molded article is transported between respective positions by using a horizontal articulated robot. The movement path between the respective positions can be set arbitrarily within a predetermined range, and the transportation can be temporarily stopped at any arbitrary position during the movement. Therefore, during the conveyance, the conveyance is temporarily stopped and the preliminary determination of the preform or the blow-molded article is carried out, thereby rejecting defective products. Alternatively, it is possible to judge whether the preform or the blow-molded article passes through at a predetermined conveying speed and to reject the defective product. That is, the first and second robots, the first defective-product discharging portion for judging both sides of the preform conveyed by the first robot and discharging the defective product when the defective product is defective, It is possible to arrange a third defective-part discharging part for judging both the second defective-product discharging part for discharging the defective product and the second-blow-molded product conveyed by the third robot, and discharging the defective product when the defective product is defective.

In the blow molding apparatus of the present invention, it is also possible to easily carry out box packing of the produced blow molded article. In this case, a collection box for collecting the second blown molded article delivered by the third robot is disposed, and the molded article recovery position is set to a position in the collection box. The secondary blow-molded article can be recovered to the collection box in an aligned state by relatively moving the collection box and the molded article recovery position by the third robot.

Next, the blow molding apparatus is provided with a heating section for heating the preform at a temperature suitable for blow molding. In this case, a conveying mechanism for conveying the preforms along the circulation path via the preform feeding position, the preform feeding position and the heated preform taking-out position to which the preforms before heating are fed, and the heating section for heating the preforms conveyed along the circulation path .

In this case, the conveying mechanism includes a rotary shaft for conveying the preform along the circular circulation path, and a conveying motor for rotating the rotary shaft. The heating section has a part of the circulation path from the preform feeding position to the heating preform taking- Each of the heating sections preferably has a self-propelled motor for rotating the preform passing through the heating position of the heating section about the central axis thereof.

For example, the conveying mechanism may include a rotary shaft for conveying the preform along a circular circulation path at a constant conveyance pitch, and a conveyance servomotor for intermittently rotating the rotary shaft at a predetermined interval by a conveyance pitch. And a plurality of heating portions arranged at equal intervals of the conveyance pitch in a portion of the circulation path between the supply position and the heated preform taking-out position, wherein each of the heating portions has a preform conveyed to the heating position of the heating portion, And a servomotor dedicated to the user for rotating the center of gravity. In this case, the preforms are intermittently conveyed by the conveying motor along the circulation path, and independently of each other, the preforms are rotated by the self-propelled motor in each heating section. It is possible to freely set the intermittent conveying speed of the preform, the residence time of the preform in each heating section, and the rotating speed in each heating section, depending on the shape and thickness of the preform to be heated. Therefore, the heating state most suitable for the preform can be efficiently formed.

As the heating portion, an external heating portion such as a heater for heating the preform from the outside is disposed. In some cases, an internal heating section for heating the preform from the inside to a predetermined temperature by inserting a heating element such as a bar heater into the inside of the preform through bending of the preform is disposed. Both of the external heating portion and the internal heating portion may be disposed. In the case of an internal heating unit using a bar heater, for example, a bar heater is disposed on a conveying rotary shaft for conveying the above-mentioned preform along a circular circulation path, Install a device that can be inserted inside.

Fig. 1 is a front view, a right side view, a left side view, and a plan view showing the internal configuration of the blow molding apparatus by the double-blow molding method according to Embodiment 1 to which the present invention is applied.
Fig. 2 is an enlarged plan view showing an internal configuration of the blow molding apparatus of Fig. 1;
3 is a plan view, a front view, a side view, and a plan view showing the gripper, showing an example of a horizontal articulated robot of the blow molding apparatus of Fig.
Fig. 4 is an explanatory view showing a blow molding apparatus by the double-blowing method according to the modification of Embodiment 1 to which the present invention is applied.
Fig. 5 is an explanatory view showing a blow molding apparatus by a single blowing method according to Embodiment 2 in which the present invention is adapted. Fig.

Hereinafter, an embodiment of a blow molding apparatus to which the present invention is applied will be described with reference to the drawings. Embodiment 1 described below is a case where the present invention is applied to a blow molding apparatus of a double blow type for manufacturing a heat resistant drink bottle or the like, but the present invention is applicable to a double blow type The present invention is not limited to this. The same can be applied to a blow molding apparatus that performs one blow molding as shown in Embodiment 2 (Fig. 5) to be described later. The same can be applied to a blow molding apparatus that performs blow molding three times or more.

(Embodiment 1)

Fig. 1 (a) is a front view showing the blow molding apparatus according to the embodiment, Fig. 1 (b) is a right side view thereof, Fig. 2 is an enlarged plan view showing the internal structure of the blow molding apparatus.

In the blow molding apparatus 1, each constituent part is arranged inside a device housing 2 having a rectangular parallelepiped shape. A supply rail 4 (chute) of a preform 3, which is a cylindrical injection-molded article having a bottom, is provided at a portion of the right side of the front surface of the apparatus housing 2, (In Fig. 1 (a) and Fig. 1 (c), the supply rail 4 is omitted). The supply rail 4 is inclined downward toward the apparatus housing 2. [ The preform 3 has a cylindrical tubular portion 3a having a bottom as shown in Fig. 3 to be described later, and a bore portion 3b formed at the tip of the tubular portion 3a And a male screw is formed on the outer peripheral surface of the bend section 3b. The preform 3 is fed from a supply source not shown in the figure with the bulging portion 3b suspended from the supply rail 4. [ The preform 3 slides by its own weight along the supply rail 4 and falls, and is transported to the inside of the apparatus housing 2.

On the right side of the inside of the apparatus housing 2, a heating station (heating station) 10 of the preform 3 is disposed. On the left side of the heating station 10, a blow-blowing blow station 20 is disposed. The front side of the blow station 20 is a defective article disposal station (defective article disposal station) 50. The left side of the blow station 20 is a bottle collection station (60). A control panel (control panel) 5 for performing drive control of each of the parts is disposed at a portion on the left side of the front surface of the apparatus housing 2. On the control panel 5, a display screen and various operation buttons are arranged. A blow molding operation (blow molding operation) or the like is executed in accordance with a preset sequence.

The heating station 10 includes a conveying motor for conveying the preform conveying rotary disk 11 and the rotary disk 11 around the center thereof, for example, a servomotor 12, . A preform conveying tool (13) is attached to the outer peripheral edge of the rotary master (11) at predetermined angular intervals. In the example shown in the drawing, the preform conveying openings 13 are arranged at 8 positions at the same intervals. In accordance with the rotation of the rotary disc 11, the preform conveying port 13 circulates along a circular circulation path 14 indicated by a one-dot chain line. The front portion side of the apparatus housing 2 in the circulation path 14 is a preform feeding position (preform feeding position) 15 in which the preform 3 is fed from the feeding rail 4. The preform 3 is delivered from the supply rail 4 side to the preform conveying port 13 at the preform supply position 15. [ The preforms 3 are conveyed along the circulation path 14 in a state in which the bend portions 3b are suspended in accordance with the rotation of the rotary disk 11.

In the circulation path 14, the heated preform take-out position (heating preform take-out position) 16 is a position rotated from the preform supply position 15 by 270 degrees in the counterclockwise direction in the figure. In a portion of the circulation path between the preform supply position 15 and the heated preform take-out position 16 in the circulation path 14, a heating unit (heating unit) 17 . Each of the heating units 17 has the same structure and has a heater which extends in the tangential direction on the outer circumferential side of the circulation path 14. [ A self-rotating motor, for example, a servo motor 18, is provided for rotating the preform 3 conveyed to the heating position (heating position) of each heating unit 17.

The preform 3 heated at a temperature suitable for blow molding in the heating station 10 is led to the blow station 20 in the heated preform take-out position 16. [ The blowing station 20 is provided with a primary blow molding die 21 on the side of the heating station 10 and a secondary blow molding die blow molding die 22) is disposed. (Primary blow molding) is performed on the preform 3 in the primary blow molding position (primary blow molding position) 23 of the primary blow molding metal mold 21, (Primary blow molded product) 3A, which is a primary blow molded product, is obtained. The primary blow molding bottle 3A is subjected to secondary blow molding (secondary blow molding) in the secondary blow molding position (secondary blow molding position) 24 of the secondary blow molding metal mold 22 (Secondary blow molded product) 3B which is a secondary blow molded product (secondary blow molded product) is obtained. In this example, the secondary blow-molded bottle 3B is the bottle that is the final product.

A first robot (first robot) 31 for preform transfer is disposed between the heated preform take-out position 16 and the primary blow molding position 23 by the primary blow molding die 21. Between the primary blow molding position 23 of the primary blow molding metal mold 21 and the secondary blow molding position 24 of the secondary blow molding metal mold 22, And a second robot (second robot) 32 for transferring from the differential blow molding position 23 to the secondary blow molding position 24 are disposed. Between the secondary blow molding die 22 and the bottle returning station 60, the secondary blow molding bottle 3B is moved from the secondary blow molding position 24 to a bottle returning position (molded product returning position) And a third robot (third robot) 33 for returning to the bottle return position 62 of the station 60 are disposed. The first, second, and third robots 31 to 33 are all horizontal articulated robots, and in this example, robots of the same standard are arranged.

3 (a), 3 (b) and 3 (c) are a plan view, a front view and a side view, respectively, of a horizontal articulated robot used as the first to third robots 31 to 33, Fig. 7 is a plan view showing a gripper. Fig.

The horizontal articulated robot 40 is provided with a mounting table 41. The mounting table 41 is provided with a first vertical pivotal arm 42 A first horizontal swing arm) 43 is mounted. A second horizontal swing arm 45 is mounted on the distal end portion of the first horizontal swing arm 43 so as to be pivotable about a second vertical axis (second vertical axis) . An elevation shaft 46 is vertically mounted on the distal end portion of the second horizontal swing arm 45. A gripper 47 capable of opening and closing in the horizontal direction is mounted on the lower end of the lifting shaft 46 extending downward from the second horizontal swing arm 45. The gripper 47 can grasp a portion of the preform 3, the primary blow molding bottle 3A or the portion of the bend 3b of the secondary blow molding bottle 3B which is the final product.

2, the heated preform take-out position 16, the primary blow molding position 23 and the secondary blow molding position 24 are formed on a straight line 6 indicated by a one-dot chain line And are located at the same interval. The primary blow molding die 21 and the secondary blow molding die 22 are each formed of a pair of right and left opening and closing dies. Each of the opening and closing dies is located on one side (one side in this example) of the opening and closing center in the direction orthogonal to the straight line 6 and the opening and closing side is on the other side Front side).

Each of the first, second and third robots 31 to 33 is configured such that the first vertical axis 42 of the first horizontal swing arm 43 is positioned on the straight line 6, Closing mold 6 so as to move on the open / close side of the opening / closing die. In this example, the first robot 31 (the first vertical axis 42 thereof) is located just between the heated preform take-out position 16 and the primary blow molding position 23. Likewise, the second robot 32 (the first vertical axis 42 thereof) is located exactly in the middle of the primary blow molding position 23 and the secondary blow molding position 24.

In the defective article disposal station 50, defective article discrimination units (defective article discrimination units) 51 to 53 are provided at positions on the front side of the apparatus housing 2 in the first to third robots 31 to 33, Respectively. The first and second robots 31 to 33 are provided with the first and second horizontal swing arms 43 and 45 which extend linearly toward the front side and are gripped by the gripper 47, ), The primary blow-molded bottle 3A and the secondary blow-molded bottle 3B are positioned at the discrimination positions of the defective-products discriminating portions 51 to 53, respectively. The preform 3, the primary blow molding bottle 3A and the secondary blow molding bottle 3B determined to be defective by the defective article discriminating portions 51 to 53 are released from gripping by the gripper 47, 47 and is returned to the waste box (waste box) 54 of the rejected waste disposal station 50 located on the lower side.

Next, a bottle collecting box (collecting box) 61 is disposed in the bottle collecting station 60. The bottle collection box 61 is arranged to be movable in the front-rear direction or the left-right direction of the apparatus housing 2, for example. The bottle return position 62 of the secondary blow-molded bottle 3B by the third robot 33 can be set to a fixed position. In this case, the bottle-returning box 61 is moved to the front, back, left and right sides by a two-axis stage (not shown), for example, In an aligned state. When the movable range of the gripper 47 of the third robot 33 includes the full width of the bottle return box 61 as shown in the drawing, And the movement of the third robot 33 in the forward and backward directions of the bottle return position 62 can be simultaneously performed to recover the secondary blow molding bottle 3B in an aligned state in the bottle return box 61 .

The bottle molding operation (molding operation) by the above-described blow molding apparatus 1 will be described below collectively. First, the preform 3 falls along the supply rail while being suspended from the supply rail 4, and is transported to the preform supply position 15. [ The preform 3 conveyed to the preform feeding position 15 is led to the preform conveying port 13 of the rotary disk 11 that has been waiting there. The preform 3 is rotated along the circulation path 14 by the first heating unit 17 so that the preform 3 is rotated by a predetermined feed pitch only by the conveyance servomotor 12, As shown in Fig. In the heating unit 17, the preform 3 rotates (rotates) around its central axis by the self-servomotor 18. The preform 3 to be rotated is heated by a heater from the outside thereof. In the case of heating the preform 3 internally, a bar heater is inserted into the preform from the upper part of the revolving plate through the bend of the preform 3 rotating and the preform 3 is heated from the inside to a predetermined temperature . The preforms 3 are heated in the respective heating units 17 and then sent out to the heated preform take-out position 16.

The preform 3 after heating is transported from the heated preform take-out position 16 to the primary blow molding position 23 of the primary blow molding die 21 in a state where the mold is opened by the first robot 31 do. The first robot 31 is temporarily stopped in the defective article discriminating section 51 during the transportation and the judgment of whether or not the bending section 3b of the preform 3 is good or not is performed. When the preform 3 conveyed by the first robot 31 passes through the discrimination position of the defective article discriminating portion 51 at a predetermined speed and the preform 3 passes by the defective article discriminating portion 51, The determination may be performed. The preforms determined to be defective by the defective-product determination unit 51 are collected in the waste box 54 of the defective-material removal station 50. [

When the preform 3 is conveyed to the primary blow molding position 23, the mold of the primary blow molding die 21 is engaged and the preform 3 is subjected to blow molding, for example, biaxial stretch blow molding 2 Axial stretch blow molding) is performed. Thus, a primary blow molding bottle 3A as a primary blow molding product is obtained from the preform 3. After the mold of the primary blow molding die 21 is opened, the primary blow molding bottle 3A is moved from the primary blow molding position 23 by the second robot 32 to the secondary And is conveyed to the secondary blow molding position 24 of the blow molding die 22. The primary blow-molded bottle 3A shrinks due to heat radiation during transportation, thereby increasing the density and imparting heat resistance. During the transportation, the second robot 32 is temporarily stopped in the defective-product determination unit 52, and the defective-product determination unit 52 determines whether the primary blow-molded bottle 3A is a positive or negative. When the primary blow molding bottle 3A transported by the second robot 32 passes the discrimination position of the defective article discriminating section 52 at a predetermined speed, The determination of whether or not the molding bottle 3A is appropriate may be performed. The primary blow molding bottle 3A determined to be a defective product is collected in the waste box 54 of the defective article disposal station 50. [

The primary blow molding bottle 3A in a predetermined heat shrink state conveyed to the secondary blow molding position 24 is secondarily blow molded by the secondary blow molding metal mold 22 with the mold closed. Thus, a secondary blow-molded bottle 3B having a predetermined size, which is a secondary blow-molded article, is obtained. After the mold of the secondary blow molding die 22 is opened, the secondary blow molding bottle 3B is transferred from the secondary blow molding position 24 to the bottle return position 62 by the third robot 33 And put it in the bottle recovery box 61. In addition, the third robot 33 is temporarily stopped in the defective-product determination unit 53 during transportation, and both parts are discriminated. It is not necessary to temporarily stop the secondary blow-molded bottle 3B at the discrimination position by the defective article discriminating part 53, but the discrimination may be made while passing the discrimination position at a predetermined speed. The secondary blow-molded bottle 3B, which is determined to be a defective product, is collected in the waste box 54.

(Modification of Embodiment 1)

Fig. 4 is an explanatory diagram showing an example of modification of the above-described blow molding apparatus 1. Fig. The basic configuration of the blow molding apparatus 100 shown in this figure is similar to the above blow molding apparatus 1 except that the heating station 110 of the preform 103, the blowing station 120 of the double- And a bottle returning station 160. In this example, two preforms 103 are heated intermittently in the heating station 110. [ Therefore, two preform conveying openings 113 are arranged at equal angular intervals along the outer peripheral edge of the rotary disk 111 for conveying the preforms. Further, in the blow station 120, two rows of blow molding lines are formed in a back-and-forth symmetrical state.

The blow molding lines in the two rows are symmetrical in the forward and backward directions. In the blow molding line on the rear side, one of the heated preform take-out position 116A in the heating station 110 and the first blow molding position 123A in the first blow molding die 121A A first robot 131A for preform transfer is disposed. Between the primary blow molding position 123A of the primary blow molding die 121A and the secondary blow molding position 124A of the secondary blow molding die 122A is disposed a primary blow molding bottle 103A1 And a second robot 132A for transporting from the differential blow molding position 123A to the secondary blow molding position 124A is disposed. The secondary blow molding bottle 103A2 is inserted between the secondary blow molding die 122A and the bottle returning station 160 from the secondary blow molding position 124A to the bottle returning position 162A And a third robot 133A for transporting the first robot 133A. The first, second, and third robots 131A, 132A, and 133A are all horizontal articulated robots.

Between the heated preform take-out position 116B and the primary blow molding position 123B formed by the primary blow molding metal mold 121B, a blow molding line for front- A first robot 131B is disposed. The primary blow molding bottle 103B1 is provided between the primary blow molding position 123B of the primary blow molding metal mold 121B and the secondary blow molding position 124B of the secondary blow molding metal mold 122B to 1 And a second robot 132B for transferring from the differential blow molding position 123B to the secondary blow molding position 124B is disposed. The secondary blow molding bottle 103B2 is inserted between the secondary blow molding die 122B and the bottle returning station 160 from the secondary blow molding position 124B to the bottle returning position 162B of the bottle returning station 160, And a third robot 133B for returning the robot to the robot. The first, second, and third robots 131B, 132B, and 133B are all horizontal articulated robots.

By heating the preforms two by two in this manner and supplying them to each of the two blowing lines to perform blow molding, it is possible to increase the processing speed (processing speed) while minimizing the increase in installation space There is an advantage. The specific configuration of each part is the same as that of the first embodiment, and a description thereof will be omitted.

(Embodiment 2)

Fig. 5 is an explanatory diagram showing an example of a blow molding apparatus by a single blow system to which the present invention is applied. The blow molding apparatus 200 of the present embodiment is provided with a heating station 210 of a preform 203, a blow molding station 220 of a single blowing type, and a bottle collecting station 260. A first robot 231 for taking the preform 203 heated at a temperature suitable for blow molding from the heated preform take-out position 216 and transporting the preform 203 to the blow molding position 223; And a second robot 232 for taking out the obtained blow-molded bottle 203A from the blow molding position 223 and transporting the blow-molded bottle 203A to the bottle return 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. Each of the first and second robots 231 and 232 is a horizontal articulated robot and is the same as that in the first embodiment.

1-blow molding machine
2 device housing
3 preform
3A Primary blow molding bottles
3B Second Blow Molded Bottles
3a cylinder
3b bend
4 Supply rails
5 control panel
6 Straight lines
10 Heating station
11 revolving disc
12 Servo motor
13 Preform conveyor
14 circulation loop
15 Preform feed position
16 Heated preform extraction position
17 Heating unit
18 Servo motor
20 blow stations
21 Primary blow mold
22 Second blow molding mold
23 Primary blow molding position
24 Second blow molding position
31 1st robot
32 2nd robot
33 3rd robot
40 Horizontal multi-joint robot
41 Mounting Base
42 first vertical axis line
43 First horizontal swing arm
44 Second vertical axis line
45 second horizontal swing arm
46 Lift shaft
47 Gripper
50 Defective goods disposal station
51 defective product discrimination unit
52 defective product discrimination unit
53 defective product discrimination unit
54 Disposal box
60 bottle collection station
61 bottle collection box
62 bottles collection location
100-blow molding machine
103 preform
103A1, 103B1 Primary blow molding bottles
103A2, 103B2 Secondary blow molding bottles
110 Heating station
111 rotating disk
113 preform conveyor
116A, 116B Heated preform take-out position
120 blow stations
121A, 121B Primary blow molding die
122A, 122B Second blow mold forming mold
123A, 123B Primary blow molding position
124A, 124B Second blow molding position
131A, 131B First robot
132A, 132B Second robot
133A, 133B Third robot
160 Bottle Collection Station
162A, 162B Bottle recovery position
200 blow molding device
203 preform
203A blow molding bottle
210 Heating station
216 Heated preform extraction position
220 blow stations
221 Mold for blow molding
223 Blow molding position
224 bottles collection location
231 First robot
232 2nd robot
260 Bottle Collection Station
262 bottles collection location

Claims (8)

A first robot for taking a preform from a heated preform take-out position (heated preform take-out position) and transferring the preform to a blow molding position (blow molding position)
A second robot for taking a blow-molded article from the blow-molding position and transporting the blow-molded article to a molded article recovery position (molded article recovery position)
A blow molding die for blow molding the preform at the blow molding position and molding the blow molded article,
However,
Each of the first and second robots is a horizontal articulated robot,
The horizontal articulated robot includes:
A first horizontal swing arm which swivels around a first vertical axis (first vertical axis)
A second horizontal swivel arm mounted on the first horizontal swivel arm and pivoting about a second vertical axis,
A lifting shaft mounted on the second horizontal swing arm and vertically movable up and down;
A gripper mounted on the lifting shaft and opening and closing in the horizontal direction is provided for gripping a portion of the preform or the portion of the mouth of the blow-
Equipped
Blow molding equipment.
A first robot which takes the preform out of the heated preform take-out position and conveys it to the primary blow molding position (primary blow molding position)
A second robot for taking the primary blow molded article (primary blow molded article) from the primary blow molding position and transporting it to the secondary blow molding position (secondary blow molding position)
A third robot (third robot) for taking out the secondary blow-molded article (secondary blow-molded article) from the secondary blow-molding position and conveying it to the molded article recovery position,
A primary blow molding die (primary blow molding die) for performing primary blow molding (primary blow molding) on the preform at the primary blow molding position to form the primary blow molding;
(Secondary blow molding die) for performing the secondary blow molding (secondary blow molding) on the primary blow molding object at the secondary blow molding position to form the secondary blow molding object
However,
Each of the first, second, and third robots is a horizontal articulated robot,
The horizontal articulated robot includes:
A first horizontal swing arm pivoting about a first vertical axis;
A second horizontal swing arm mounted on the first horizontal swing arm and pivoting about a second vertical axis;
An elevating shaft mounted on the second horizontal swing arm and vertically movable up and down,
A gripper mounted on the lifting shaft and opening / closing in the horizontal direction is provided for gripping a portion of the preform, the primary blow-molded object, or the secondary blow-molded object in which the primary or secondary blow-
Equipped
Blow molding apparatus.
3. The method of claim 2,
The heated preform take-out position, the primary blow molding position and the secondary blow molding position are arranged at predetermined intervals along a straight line,
Wherein each of the primary blow molding metal mold and the secondary blow molding metal mold has a vertical opening center line that is located on one side (one side) orthogonal to the straight line, (Open / close mold) for opening / closing the other side (the other side)
Wherein each of the first, second, and third robots has a first vertical axis of the first horizontal swing arm located on the straight line, and the gripper is located on the open / close side (open / close side) To move
Blow molding apparatus.
The method of claim 3,
A first defective-product discharging portion (first defective-product discharging portion) for judging whether the preforms conveyed by the first robot are positive or negative and discharging the defective product when the defective product is defective,
A second defective-part discharging part (second defective-part discharging part) for judging both the parts of the primary blow-molded part conveyed by the second robot and discharging the defective part in the case of a defective part;
A third defective-product discharging portion (third defective-product discharging portion) for discharging the defective product in the case of a defective product by judging both parts of the secondary blow-molded product carried by the third robot,
Wherein at least one of the plurality of nozzles is disposed.
The method of claim 3,
(Collecting box) for collecting the secondary blow-molded article delivered by the third robot,
The molded article recovery position is a position in the collection box,
The recovery box is movable
Blow molding apparatus.
The method of claim 3,
A preform feed position (preform feed position) where the preforms before heating are fed,
A conveying mechanism (conveying mechanism) for conveying the preform along a circulation path via the preform feeding position and the heated preform taking-out position,
A heating unit (heating unit) for heating the preforms conveyed along the circulation path
A blow molding device.
The method according to claim 6,
The conveying mechanism includes a rotating plate for conveying the preform along the circular circulation path and a conveying motor for rotating the rotating plate,
Wherein the heating section has a plurality of heating sections arranged at predetermined intervals in a part of the circulation path between the preform feeding position and the heating preform extraction position,
Each of the heating sections is provided with a motor for self-rotation which rotates the preform passing through a heating position (heating position) of the heating section about its central axis line
Blow molding apparatus.
8. The method according to claim 6 or 7,
The heating unit may include a blowing unit having one or both of an external heating unit for heating the preform from the outside and an internal heating unit for heating the inside of the preform from the inside, Molding device.

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