JP7240219B2 - hollow molding machine - Google Patents

Description

The present invention relates to a device for taking out a molded product of a blow molding machine, and more particularly, to a blow molding machine that is designed to improve the efficiency of the facility installation space, including a transport means for transporting a molded product (product) taken out from the blow molding machine. It relates to a molded article take-out device.

As a technology for taking out a molded product in this type of blow molding machine, for example, one described in Patent Document 1 has been proposed.

In the blow molding machine described in Patent Document 1, a take-out device having a degree of freedom of movement in two orthogonal axes (horizontal direction and vertical direction) driven by a servomotor is arranged adjacently to the outside of the molding machine. After being cooled by the cooling nozzle and separated by the burr separating device, the molded product is gripped by a rod-like arm of the take-out device and pulled out of the machine in the horizontal direction.

A belt conveyor for transporting the molded product is on standby under the molded product pulled out of the machine. Then, the molded product gripped by the rod-shaped arm of the take-out device is moved down together with the rod-shaped arm, and then transferred to the belt conveyor by the release operation of the rod-shaped arm, and conveyed to a predetermined position. (See paragraphs [0024] to [0025] and FIGS. 9 and 10 of Patent Document 1).

In addition, the blow molding machine described in Patent Document 1 is a so-called multi-layer molding machine in which the die head is connected to four extruders, and four parisons are extruded from the die head. In addition to the molding die for sandwiching the parison, two sets of air blowing devices for blowing compressed air into each parison are provided. As a result, the blow molding machine is configured as a so-called double-station type machine for taking multiple pieces. However, even in a so-called single-station type blow molding machine having a set of molding dies and a set of air blowing devices, the basic operation is the same as that of the double station type.

JP 2014-65196 A

However, in the conventional blow molding machine represented by Patent Document 1, the direction of freedom in the horizontal direction of the take-out device is nothing but the direction of take-out of the molded product from the molding machine. The belt conveyor is installed so that the two directions are aligned in a plan view.

Therefore, there is a problem that the horizontal drawing distance by the take-out device is long, and the installation space for the entire equipment including the blow molding machine, the take-out device and the belt conveyor is large, and the space efficiency is poor.

The present invention has been made in view of such problems, and aims to reduce the installation space of the entire equipment including the blow molding machine, take-out device and conveying means such as conveyors that accompany the blow molding machine. It is another object of the present invention to provide a device for taking out a molded article for a blow molding machine.

The present invention is a blow molding machine that sandwiches a parison extruded from a die head between a pair of front and rear dies and blows compressed air into the parison from an air blowing nozzle to form a hollow molded product.

In addition, the device for taking out a molded article includes a swivel head that can swivel about a vertical axis, a gripper device provided on the swivel head for gripping a molded article molded by the blow molding machine, and the conveying means has a conveying path that can reduce the installation space of the blow molding machine so as to intersect the extension line direction of the parting line in a plan view .

Then, the molded product gripped by the gripper device is taken out of the machine, and the swivel head rotates while maintaining the posture of the molded product gripped by the gripper device using the degree of freedom of movement of the swivel head. It is characterized in that it is transferred to a conveying path of conveying means.

Examples of the conveying means include belt conveyors, roller conveyors, slat conveyors, shooters, and the like. In addition, as the gripper device, for example, in addition to the two-finger grip type, a suction cup type can be used.

As a desirable mode, as described in claim 2, the molded article removing device includes an X-axis slider movable along a horizontal guide rail extending in an extension line direction of the parting line, and the X-axis slider a Z-axis slider that is movable along a vertical guide rail provided in the .

According to the present invention, since the device for taking out a molded product has freedom of movement about two orthogonal axes and freedom of rotation around the vertical axis, the direction of the molded product taken out from the blow molding machine in the horizontal direction can be adjusted. A change can be made immediately and the conveying direction of the conveying means can be set accordingly. Therefore, it is possible to intersect the horizontal take-out direction from the blow molding machine and the conveying direction of the molded product by conveying means such as a conveyor. It is possible to reduce the overall equipment installation space including the equipment and transport means.

FIG. 2 is a diagram showing a specific embodiment of the present invention, and is a front view including a blow molding machine, a device for taking out a molded product associated therewith, and a belt conveyor (state in which the mold is on the air blowing stage). The top view which extracted only the main thing among the elements shown in FIG. FIG. 2 is an explanatory view showing an example of a molded product to be molded by the blow molding machine shown in FIG. 1; FIG. 2 is an enlarged view showing details of the belt conveyor also shown in FIG. 1; 2 is a front view when the gripper device moves forward from the state shown in FIG. 1 to a transfer stage on the side of the blow molding machine; FIG. FIG. 6 is a plan view extracting only the main elements among the elements shown in FIG. 5; FIG. 6 is a front view when the gripper device gripping the molded product moves backward from the state of FIG. 5 ; FIG. 8 is a plan view extracting only the main elements among the elements shown in FIG. 7; FIG. 8 is a front view when the gripper device that grips the molded product in the state of FIG. 7 performs a turning motion; FIG. 10 is a plan view in which only the main elements are extracted from the elements shown in FIG. 9; FIG. 10 is a front view when the gripper device gripping the molded product moves downward from the state of FIG. 9; FIG. 12 is a plan view in which only the main elements are extracted from the elements shown in FIG. 11; FIG. 12 is a front view of only the essential parts when the gripper device releases the molded product from the state of FIG. 11 and transfers it to the belt conveyor; FIG. 14 is a plan view extracting only the main elements among the elements shown in FIG. 13; FIG. 14 is a front view when the gripper device is raised from the state of FIG. 13; FIG. 16 is a plan view in which only the main elements are extracted from the elements shown in FIG. 15;

1 to 16 show a more specific embodiment for carrying out a device for taking out a molded article (hereinafter simply referred to as "taking out device") for a blow molding machine according to the present invention. In particular, FIG. 1 shows a front view of a blow molding machine 1, a take-out device 2 arranged adjacent thereto, and a belt conveyor 10 as a conveying means, and FIG. 2 shows a plan view of the essential parts of FIG. 3 shows an example of a hollow molded article W to be molded by the blow molding machine 1 shown in FIG.

Although the details of the blow molding machine 1 are omitted in FIGS. is sandwiched between a pair of front and rear molds (molding molds) 5a and 5b, and a parison sandwiching stage S1 is adjacent to the parison sandwiching stage S1 and is sandwiched between the pair of molds 5a and 5b. An air blowing stage S2 in which compressed air is blown into a parison by an air blowing nozzle (not shown) to form a predetermined hollow molded product shape (convex shape), and a parison sandwiching stage sandwiching the air blowing stage S2. A delivery stage S3 located on the opposite side of S1 is set respectively.

A molded product (product) W to be molded by the blow molding machine 1 shown in FIGS. 1 and 2 is, as shown in FIG. A handle portion G and a neck portion N are integrally formed on the upper portion of the portion B. As shown in FIG.

As shown in FIGS. 1 and 2, a pair of molds 5a and 5b are fixed to a pair of independent front and rear platens 4a and 4b, and both platens 4a and 4b are supported by a mold clamping device 3. there is When the pair of platens 4a and 4b move toward and away from each other by the operation of the mold clamping device 3, the molds 5a and 5b are moved to clamp and open. At the same time, the mold clamping device 3 including the pair of molds 5a and 5b and the platens 4a and 4b shifts between the parison clamping stage S1 and the air blowing stage S2 by the operation of a mold clamping slide mechanism (not shown). It's like

As shown in FIGS. 1 and 2, molded product holders 6 and 7 protruding sideways are provided on the side surfaces of the pair of platens 4a and 4b. The pair of molded product holders 6 and 7 includes a lower product holder 8 extending downward from the respective holder bodies 6a and 7a and having a substantially L shape in side view, and a lower product holder 8 extending upward from the respective holder bodies 6a and 7a. an upper product holder 9 which extends and is substantially L-shaped in side view. The lower product holders 8 and the upper product holders 9 of both molded product holders 6, 7 face each other.

Each pair of lower product holder 8 and upper product holder 9 shown in FIG. 1 is intentionally shown in FIGS. are omitted. Further, as shown in FIG. 1, the overall shape of one molded product holder 6 including the lower product holder 8 and the upper product holder 9 is similar to the contour shape of the molded product W. .

Then, as will be described later with reference to FIG. 9, the pair of molds 5a and 5b is held by the parison while the mold clamping device 3 including the pair of molds 5a and 5b and the platens 4a and 4b is on the parison sandwiching stage S1. , the pair of molded product holders 6 and 7 interlock with the movement of the platens 4a and 4b to clamp the molded product W in the previous molding cycle on the adjacent air blowing stage S2. It will be supported by sandwiching it. Furthermore, when the mold clamping device 3 including the pair of molds 5a and 5b and the platens 4a and 4b shifts from the parison clamping stage S1 to the air blowing stage S2, as shown in FIG. The pair of molded product holders 6 and 7 that are holding the molded product W are shifted to the transfer stage S3 together with the supported molded product W in the previous molding cycle.

When the pair of molded product holders 6 and 7 support the molded product W, each lower product holder 8 moves below the bottom surface of the molded product W due to the movement of the two molded product holders 6 and 7 approaching each other. The upper product holders 9 enter and support the molded product W from below, and both of the upper product holders 9 grip the neck portion N of the molded product W. As shown in FIG.

The air blowing stage S2 is provided with an elevating air blowing nozzle (not shown). Then, when the mold clamping device 3 including the pair of molds 5a and 5b sandwiching the parison is shifted to the air blowing stage S2, the air blowing nozzle is inserted into the parison to blow compressed air into the parison. As a result, the parison is molded (molded) into a predetermined molded product shape. After the completion of air blowing, when the pair of molds 5a and 5b are opened and the mold clamping device 3 shifts toward the original parison clamping stage S1, the molded product W after the completion of air blowing is a pair of molds. are released from the molds 5a and 5b, and are supported by the air blowing nozzle in a suspended state.

As described above, in the air blowing stage S2, when the pair of molded product holders 6 and 7 support the molded product W after air blowing is completed, an air blowing nozzle (not shown) moves upward to blow air. It is extracted from the molded product W after completion.

Therefore, as a series of operations in the parison sandwiching stage S1 and the air blowing stage S2, when the parison is sandwiched by the mold clamping operation of the pair of molds 5a and 5b in the parison sandwiching stage S1, the adjacent air blowing stage S2 simultaneously , the molded product W, which has been blown with air at the air blowing stage S2, is supported by a pair of molded product holders 6 and 7. As shown in FIG. When the pair of molds 5a and 5b with the parison sandwiched therebetween shift from the parison sandwiching stage S1 toward the adjacent air blowing stage S2 together with the mold clamping device 3, they are supported by the pair of molded product holders 6 and 7 at the same time. The molded article W which is being held is shifted from the air blowing stage S2 toward the adjacent delivery stage S3.

As shown in FIG. 1, a take-out device 2 is arranged adjacent to the blow molding machine 1 on the right side thereof. A belt conveyor 10 is arranged below the take-out device 2 as a conveying means. As shown in FIG. 2, when the parting line between the pair of molds 5a and 5b in plan view is PL, the belt conveyor 10 is arranged so as to be orthogonal to the extension line direction of the parting line PL in plan view. ing.

As will be described later, the take-out device 2 shown in FIG. 1 includes an X-axis slide device 11 having, as a main element, an X-axis slider 13 capable of sliding in the horizontal direction (the same X direction as the extension line direction of the parting line PL). , a Z-axis slide device 15 having a Z-axis slider 17 slidably movable in the vertical direction (the Z direction, which is the vertical direction) as a main component, and a turning unit 19 having a turning head 21 capable of turning around the vertical axis. , is composed of a combination of As a result, the take-out device 2 has degrees of freedom of movement in two orthogonal axes in the horizontal and vertical directions, and degrees of freedom in one axis of rotation around the vertical axis. The take-out device 2 functions as an unloading device (unloader) for taking out the molded article W molded by the blow molding machine 1 to the outside.

As shown in FIG. 1, a cantilevered support beam 23 extends horizontally from a frame 22 of the blow molding machine 1, and a horizontal X-axis slide unit 12 is fixed to the support beam 23. there is The X-axis slide unit 12 supports an X-axis slider 13 that can slide along the X-axis slide unit 12 in the horizontal direction (X direction). The X-axis slider 13 horizontally slides the Z-axis slide unit 16 via a ball screw (not shown) driven by a servomotor 14 provided in the X-axis slide unit 12 and a built-in guide rail. It will be. Therefore, the X-axis slide device 11 is composed of the horizontal X-axis slide unit 12, the X-axis slider 13, their driving system, and the like.

As shown in FIG. 1 , a vertical Z-axis slide unit 16 is fixed to the X-axis slider 13 so as to be perpendicular to the horizontal X-axis slide unit 12 . The Z-axis slide unit 16 supports a Z-axis slider 17 that can slide vertically (Z direction) along the Z-axis slide unit 16 . The Z-axis slider 17 slides vertically along the Z-axis slide unit 16 via a ball screw (not shown) driven by a servomotor 18 provided in the Z-axis slide unit 16 and a built-in guide rail. will move. Therefore, the vertical Z-axis slide unit 16, the Z-axis slider 17, their drive system, etc. constitute the Z-axis slide device 15. As shown in FIG.

Furthermore, the Z-axis slider 17 is provided with a turning unit 19 . The swivel unit 19 has a swivel head 21 supported under a base portion 20 fixed to the Z-axis slider 17 so as to swivel about a vertical axis. The swivel head 21 can be driven forward and backward every 90 degrees according to the extension and contraction of a pair of air cylinders arranged on the base portion 20, for example. The turning unit 19 is only an example, and for example, an air motor type or an electric motor type may be used, and the turning angle is not limited to 90 degrees, and any angle can be selected. be.

As shown in FIGS. 1 and 2, the swivel head 21 of the swivel unit 19 is equipped with a so-called two-fingered gripper device 24 . As shown in FIG. 9, which will be described later, the gripper device 24 includes an air cylinder unit 25 functioning as a direct-acting actuator, and a pair of support arms 26 arranged oppositely on both sides of the air cylinder unit 25. , bar-shaped fingers 27 projecting from each support arm 26 toward the blow molding machine 1 and parallel to each other, and a soft pad 28 attached to the opposing inner surfaces of the pair of fingers 27. - 特許庁

As shown in FIG. 9, the air cylinder unit 25 has a pair of independent rod members 29a protruding from both sides of a body 29, and the pair of rod members 29a extend and contract relative to the body 29 in opposite directions. It is of working construction. Therefore, according to the operation of the air cylinder unit 25, the pair of fingers 27 and the pair of support arms 26 can move toward and away from each other. It's becoming

As described above, the take-out device 2 has the degree of freedom of sliding the X-axis slider 13 along the horizontal X-axis slide unit 12, the degree of freedom of sliding the Z-axis slider 17 along the vertical Z-axis slide unit 16, and the turning unit. 19 and the degree of freedom of rotation around the extension axis of the swivel head 21, it has degrees of freedom of motion of two orthogonal axes and one axis of swivel.

FIG. 4 shows an enlarged view of the belt conveyor 10 as the conveying means shown in FIG. The belt conveyor 10 has a known structure in which an endless conveyor belt 10a serving as a conveying path is wound between a pair of belt pulleys. A plurality of guide members 32 are provided along the longitudinal direction on both sides of the conveyor belt 10a via brackets 30 and posts 31 extending from the non-movable portion of the belt conveyor 10 itself. These guide members 32, as shown in FIGS. 13 to 15, serve to guide the molded product W conveyed by the conveyor belt 10a of the belt conveyor 10 from both sides.

In addition, illustration of the guide member 32 attached to the belt conveyor 10 is omitted except for FIG. Further, in FIG. 1, reference numeral 33 denotes a safety cover mainly composed of a transparent plate, and this safety cover 33 covers the take-out device 2. As shown in FIG. Further, reference numeral 34 denotes a cable guide device (trade name: Cableveyor (registered trademark)), which has a function of guiding air hoses and electric cables connecting the blow molding machine 1 side and the take-out device 2 side.

Next, a series of movements of the take-out device 2 configured as described above will be described in detail with reference to FIGS.

When the take-out device 2 does not take part in taking out the molded product W molded by the blow molding machine 1 shown in FIG. 1, the movable part of the take-out device 2 is on standby with the retracted position shown in the figure as the origin position. That is, the X-axis slider 13 is at the retracted position shown in FIG. 1, and the Z-axis slider 17 is at the raised position shown in FIG. Then, when the molding cycle in the blow molding machine 1 is repeated and the molded product W after molding is conveyed to the transfer stage S3, the movable part of the take-out device 2 moves from the retracted position shown in FIG. 1 to the advanced position shown in FIG. Move forward to the position.

That is, as described above, when the molded product W held by the molded product holders 6 and 7 is conveyed from the air blowing stage S2 to the delivery stage S3, the take-out device 2 can be moved later. advances to the advanced position shown in FIG.

The forward motion of the movable part of the take-out device 2 allows the pair of fingers 27 of the gripper device 24 to move the molded product W supported by the molded product holders 6, 7 without interfering with the molded product holders 6, 7. It means to enter to a graspable position. Then, the pair of fingers 27 of the gripper device 24 are immediately clamped at the forward position to grip the body B (see FIG. 3) of the molded product W as shown in FIGS. That is, as shown in FIGS. 5 and 6, the molded product W supported by the pair of molded product holders 6 and 7 is also gripped by the pair of fingers 27 of the gripper device 24 at the same time.

When the pair of fingers 27 of the gripper device 24 grips the molded product W, as shown in FIGS. The molded product holders 6 and 7 are separated from each other to release the molded product W. On the other hand, the movable part of the take-out device 2, in which the pair of fingers 27 are gripping the molded product W, immediately returns to the retracted position shown in FIGS.

Subsequently, as shown in FIGS. 9 and 10, the pair of molds 5a and 5b in the mold open state are shifted together with the mold clamping device 3 from the air blowing stage S2 to the parison sandwiching stage S1, and interlockingly with that. , the pair of molded product holders 6 and 7 are shifted from the transfer stage S3 to the air blowing stage S2. The pair of molds 5a and 5b shifted to the parison sandwiching stage S1 sandwiches the parison by a mold clamping operation. At the same time, in conjunction with the mold clamping operation of the pair of molds 5a and 5b, at the air blowing stage S2, the molded article W molded by compressed air blowing is supported by a pair of molded article holders 6 and 7. be done.

In parallel with the above-described operations in the parison sandwiching stage S1 and the air blowing stage S2, the X-axis slider 13 and the Z-axis slider 17 of the take-out device 2 have returned to the retracted position, and the state of FIG. The swivel head 21 of the swivel unit 19 rotates 90 degrees in the counterclockwise direction to the state shown in FIG. As the swivel head 21 swivels, the molded product W gripped by the pair of fingers 27 of the gripper device 24 also swivels in the same direction by 90 degrees. As described above, the molded product W gripped by the pair of fingers 27 rotates 90 degrees together with the gripper device 24, so that the longitudinal direction of the fingers 27 in the gripper device 24 coincides with the conveying direction of the belt conveyor 10. Become.

Subsequently, as shown in FIGS. 11 and 12, the pair of molds 5a and 5b with the parison sandwiched therebetween in the parison sandwiching stage S1 is shifted together with the mold clamping device 3 to the air blowing stage S2, and molding is performed by blowing compressed air. (Conjugation) is performed. In conjunction with this, the pair of molded product holders 6 and 7 that previously supported the molded product W on the air blowing stage S2 shifts to the transfer stage S3.

11 and 12, when the swivel head 21 swivels 90 degrees, the Z-axis slider 17 descends from the raised position to the lowered position and stops. At this stage, the molded product W gripped by the pair of fingers 27 of the gripper device 24 does not touch the conveyor belt 10a of the belt conveyor 10 and is slightly lifted from the conveyor belt 10a.

Thereafter, as shown in FIGS. 13 and 14, the gripper device 24 is released and the pair of fingers 27 are separated from each other, whereby the molded product W is released from the gripper device 24 and transferred to the conveyor belt 10a of the belt conveyor 10. be transferred. As a result, the molded product W is conveyed to a predetermined position by the belt conveyor 10. As shown in FIG.

At this stage, the molding by blowing compressed air in the air blowing stage S2 shown in FIGS. 11 and 12 is continued. On the other hand, the gripper device 24, which has released the molded product W and finished transferring it to the belt conveyor 10 side, returns to the raised position together with the Z-axis slider 17 as shown in FIGS.

After that, in the take-out device 2, the gripper device 24 in the released state rotates 90 degrees in the counterclockwise direction together with the swivel head 21 to return to the original state shown in FIGS. After that, the series of operations described so far are repeated.

As described above, in the take-out device 2 of the present embodiment, the take-out device 2 itself has a degree of freedom of movement about the vertical axis in addition to the degree of freedom of operation of the two orthogonal axes, so that it can move horizontally from the blow molding machine 1. The orientation of the molded article W taken out can be changed immediately, and the conveying direction of the belt conveyor 10, which is the conveying means, can be set accordingly.

This means that the direction in which the molded article W is taken out from the blow molding machine 1 in the horizontal direction and the direction in which the molded article W is conveyed by the belt conveyor 10 in plan view can be crossed. Therefore, it is possible to reduce the installation space for the entire equipment including the blow molding machine 1 and the take-out device 2 and the belt conveyor 10 that accompany it.

Here, in the above embodiment, the so-called rectangular bottle-shaped molded product W shown in FIG. 3 was taken as an example, but the shape of the molded product W is not particularly limited. Further, although the belt conveyor 10 has been described as an example of conveying means for the molded product W, a roller conveyor, a slat conveyor, or a shooter, for example, can be used in place of the belt conveyor 10 . Furthermore, the gripper device 24 is not limited to the two-finger gripping type, but may be of other types such as a suction cup (suction pad) type.

Similarly, in the above-described embodiment, when the take-out direction (X direction) of the molded product W along the extension line direction of the parting line PL and the conveying direction by the belt conveyor 10 are orthogonal in plan view. However, the two do not necessarily have to be perpendicular to each other, and if they intersect, the intended purpose can be achieved, and the swivel angle of the swivel head 21 is set accordingly.

Furthermore, like the one previously described as Patent Document 1, the present invention can be applied without difficulty to a blow molding machine of the type in which a plurality of molded products W are molded at the same time. In addition, as in the case of Patent Document 1, the transfer stage S3 may be a burr separation stage for separating "burrs" from the molded product W after molding. Even in such a case, the present invention can be applied.

DESCRIPTION OF SYMBOLS 1... Blow molding machine 2... Molded article take-out apparatus 5a, 5b... Mold 6, 7... Molded article holder 10... Belt conveyor (conveyance means)
10a Conveyor belt (conveyance path)
REFERENCE SIGNS LIST 11 X-axis slide device 12 X-axis slide unit 13 X-axis slider 15 Z-axis slide device 16 Z-axis slide unit 17 Z-axis slider 19 Turning unit 21 Turning head 24 Gripper device 27 Finger PL ... Parting line S1 ... Parison sandwiching stage S2 ... Air blowing stage S3 ... Delivery stage

Claims (2)

A hollow molding machine that sandwiches a parison extruded from a die head between a pair of front and rear dies and blows compressed air into the parison with an air blowing nozzle to form a hollow molded product,
Molding in which the molded product molded by the blow molding machine is taken out of the machine along the extension line direction of the parting line in the plan view of the pair of molds, and then transferred to a conveying means. Equipped with a product pick-up device,
The molded article take-out device is
a swivel head capable of swiveling about a vertical axis;
a gripper device provided on the swivel head for gripping a molded product molded by the blow molding machine;
along with
The conveying means has a conveying path that can reduce the installation space of the blow molding machine so as to intersect the extension line direction of the parting line in plan view,
While taking out the molded product gripped by the gripper device from the machine,
The swivel head rotates while maintaining the posture of the molded product gripped by the gripper device by using the degree of freedom of movement of the swivel head, and transfers the molded product to the transport path of the transport means ,
A blow molding machine characterized in that it can turn around the vertical axis to immediately change the direction of the molded product, and can set the conveying direction of the conveying means in accordance with it . In the blow molding machine according to claim 1,
The molded article take-out device is
an X-axis slider movable along a horizontal guide rail extending in the extension line direction of the parting line;
a Z-axis slider movable along a vertical guide rail provided on the X-axis slider;
A blow molding machine comprising :

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