JPS6235973B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an apparatus for manufacturing blown glass products.
Specifically, a workbench equipped with a circular inlet into which the molten glass gob is poured, a mold that can be opened and closed below the inlet, and a mold located above the inlet to press the molten glass gob; a rotary glass blowing head for blowing the molten glass gob into the mold through an inlet, and a cutter for cutting off the solidified glass excess flange around the edge of the inlet that is flush with the workbench; This invention relates to a manufacturing device for blown glass products.

BACKGROUND OF THE INVENTION Devices of the above-described construction are known and widely used in machines equipped with turntables. In such a machine, a plurality of devices having the above-mentioned configuration are arranged in a circle, and glass products are manufactured one after another while each work cycle is executed as the turntable rotates.

As the turntable rotates, each device passes through a feeding zone in which a molten glass gob, the raw material for blown glass products, is fed to a portion of the workbench concentric with the inlet.

Then, while the blowing head descends toward the molten glass gob and presses the glass gob,
Push it out to the inlet on the workbench. Thereafter, the outer periphery of the glass gob is expanded to form an overfill flange between the head and the upper edge of the inlet. This excess flange solidifies while remaining above the workbench.

On the other hand, the part of the molten glass forced below the workbench flows into the casting and is then heated inside the mold by the shape of the mold cavity by blowing compressed air through the head. It is then molded into the desired final shape.

The entire process from holding down to blowing is carried out while the closed mold is not rotating but the head and workbench are rotating at the same speed. Specifically, the workbench is suspended from the head via a strong support.

After the blowing of compressed air is finished, and the glass is still hot, once it has solidified sufficiently,
Open the mold. At this time, the blown glass product hangs from the workbench because an extra flange whose outer diameter is larger than the diameter of the inlet is formed above the workbench.

When the cutter reaches the cutting area as the turntable rotates thereafter, the disk-shaped rotary cutter, which is in a stopped state, overlaps the top surface of the workbench, engages with the extra flange, and cuts it off. The blown glass product from which the extra flange has been cut off is either taken down by a discharge device or placed on a conveyance means and conveyed to the next processing station.

The cut-off excess flange is either thrown away as unnecessary glass fragments or collected,
It often ends up in blown glassware. If the walls of the blown glassware are thin, the glassware will solidify quickly, so even if a piece of glass falls into it,
It is highly unlikely that anything untoward will happen.

However, if the wall thickness of the glass product is large, the story is different. This is because the greater the wall thickness of the glass product, the longer it will take to completely solidify, and if a piece of glass falls into the product before it solidifies, it will stick to the bottom. In particular, if the glass product is a drinking cup or has a thick gas bottom, care must be taken to prevent glass fragments from falling. On the other hand, if the glass fragments fall and stick to the bottom, the glass product no longer has a commercial value.

OBJECTS OF THE INVENTION It is precisely the object of the present invention to provide an apparatus that can overcome the aforementioned drawbacks of conventional blown glassware manufacturing apparatuses.

The present invention provides an apparatus for producing blown glass products having the above-mentioned configuration, in which the work table is configured to be able to be reversed over 180 degrees between a work position and an inverted position in which the overfill flange faces downward; When the table is in the inverted position, the cutter cuts off the extra flange that is flush with the workbench, and this is done using a sprocket that moves integrally with the workbench and a fan-shaped member with teeth. By engaging with the head, the workbench is turned around the reversal axis from a working position immediately below the head to a reversing position located laterally.

In the apparatus according to the present invention having such features, when the workbench is turned over, the main body of the blown glass product will be upward and the extra flange will be below, so if the extra flange is removed in this state, , it is absolutely impossible for it to fall into the body of the gas product.

In addition, with conventional equipment, the extra flange was cut with the glass product facing down, so not only did the glass fragments from the extra flange fall into the main body as described above, but it also required cleaning of the glass fragments scattered on the workbench. Although necessary, in the present invention, all the glass fragments fall downward and can also be dropped into a suitable collection container or removal conveyor, so there is no need for cleaning.

Embodiments Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 relate to one embodiment of the present invention. Reference numeral 10 denotes a blowing head of conventional construction, which not only supports the head but also
It is attached to the lower end of a hollow shaft 12 which also functions as a duct for supplying compressed air to this head. The hollow shaft 12 passes through the hollow spindle 14 so as to be slidable in the axial direction, and is spline-coupled so that it can rotate integrally with the hollow spindle 14 when it rotates. This hollow spindle 14 can be rotated in one direction when blowing compressed air into the molten glass gob to expand it into a desired shape. Rotate in the direction.

Hollow spindle 14 is secured to a support mechanism, generally designated 16. This support mechanism 16
consists of a disc 18 with a central sleeve 20 constituting an extension at the lower end of the spindle 14, and a fan-shaped member 24 with tooth grooves is formed on a portion of the outer periphery of the disc 18 with the horizontal axis B. A hanging portion 22 is provided extending downward. Note that the horizontal axis B is perpendicular to the vertical axis A.

As will be described later, the workbench 26 is designed to be able to rotate between the working position shown in FIGS. 1 and 2 and the inverted position shown in FIG. If there is a hole 2 that has a shape that expands downward
8 is formed. A plate-shaped protrusion 30 is provided on the outer periphery of the workbench 26 so as to extend perpendicularly thereto. Workbench 26 at this plate-like projection 30
A sprocket 32 is integrally formed on the opposite side of the sprocket, and is constantly engaged with the fan-shaped member 24 with tooth grooves described above as described later.

A pair of pins 34 are attached to the sleeve 20 so as to extend radially on both sides thereof. The positions on the sleeve 20 where the pair of pins 34 are attached are selected so that the axis of each pin 34 is located at the center of curvature of the fan-shaped member 24. On these pins 34, mutually parallel arms 36 are pivoted on both sides of the sleeve 20, forming a swinging lever indicated by 38. A pair of parallel arms 36 constituting the swing lever 38 are connected to each other by a cross member 40 at one end adjacent to the fan-shaped member 24 and the hanging portion 22, and a bush 42 is integrally formed therein. As shown in FIG. 4, a bearing 44 is interposed inside a bush 42 formed at one end of the arm 36.
The small diameter shaft ends at both ends of the sprocket 32 are rotatably inserted into the sprocket.

A bifurcated yoke 48, on which a trochanter 50 is rotatably mounted, is attached to the other end of the arm 36 on the opposite side to the ends connected to each other by the cross member 40. The action of this trochanter 50 will be described later.

A helical torsion spring 52 is mounted on the pin 34, and one end of this torsion spring 52 is connected to the arm 38 constituting the swing lever 38, and the other end is connected to an adjustment nut 54 screwed onto the pin 34. It is moored. By adjusting the position relative to the pin 34, the adjusting nut 54 can be adjusted to the corresponding torsion spring 5.
The biasing force generated by the pin 2 can be adjusted, but at the same time it can be locked against the pin 34. To this end, each adjusting nut 54 is formed with at least one or a plurality of radial pin holes 56 as shown, and the pin 34 is also formed with a lateral hole so that the locking pin 6
0 in either pair of pin holes 56 of each nut 54.
and the horizontal hole in the pin 34. The biasing force of the torsion spring 52 moves the swinging lever 38, that is, the parallel arm 36, about the pin 34 in a counterclockwise direction (indicated by arrow C in FIG. 3) when viewed from FIGS. 2 and 3. It acts to rotate.

The end of the plate-shaped protrusion 30 remote from the workbench 26 is provided with a slope 62 forming a wedge surface.

A central slot 64 is formed in the hanging portion 22 and the fan-shaped member 24, and a cross pin 66 for pivotally supporting the pawl member 64 projects into the slot 64. The pawl member 68 has a lower tooth 70 with a bevel 72 that cooperates with the bevel 62 of the plate-shaped projection 30 for purposes to be described below. Also, the free end 74 of the pawl member 68, while projecting toward the vertical axis A, is located above the outer periphery of the head. Further, on the side opposite the free end 74, a lug 76 is formed on the claw member 68, and a tension spring 78 is provided between the lug 76 and a lug 80 fixed to the disk 16 of the support mechanism 16. is interposed, the claw member 68 is biased clockwise (in the direction of arrow D) around the cross pin 66 as shown in FIGS. 2 and 3 due to the tensile action of the spring 78. There is.

Hereinafter, the operation of the apparatus having the configuration shown in FIGS. 1 to 4 will be explained.

First, when each part of the device is in the state shown in Figure 2, when blowing glass products is to be performed,
The head 10 is in the raised position shown in dotted lines in FIG. 2, and the workbench is horizontal with the hole 28 concentric with the vertical axis A of the head 10. At that time, the biasing force of the torsion spring 52 is applied to the swing lever 38,
Since it acts on the workbench 26 via the ratchet 32 and the plate-like protrusion 30, the workbench
6 is kept in a horizontal position, ie, in a working position, as shown in FIG.

Therefore, in the glass raw material supply area, a workbench 26
A molten glass gob (not shown) is placed over the hole 28. Thereafter, while the head 10, the support mechanism 16, and the workbench 26 are all rotated as one, the head 1
0 is lowered from the raised position shown by the dotted line to the lowered position shown by the solid line. When the head 10 descends in this manner, the claw member 68 also rotates clockwise about the cross pin 66 from the position shown by the dotted line to the position shown by the solid line due to the action of the tension spring 78. The slope 72 and the slope 62 of the plate-like protrusion 30 form a wedge-like engagement to ensure that the workbench 26 in the working position is locked in that position. Further, when the head 10 descends, the molten glass gob that was supplied so as to rest on the hole 28 of the workbench 26 is pushed through the hole 28, but at that time, a part of the outer periphery of the molten glass gob It is sandwiched between the lower surface of the head 10 and the edge of the hole 28 to form a glass extra flange CL.

A mold 8 is placed below the workbench 26 in the working position.
4. For example, if a split mold is present, by the time the head 10 finishes lowering, it will be closed. (In FIG. 2, only a portion of the mold 84 is shown.) When the head 10 reaches the lowered position, the head 10
By blowing the molten glass gob and compressed air through the molten glass gob, the molten glass gob is pushed into the mold 84, and at the same time,
It expands inside the mold 84 to form a glass product V, such as a drinking water cup, having the shape shown by the dotted line in FIG.

When the glass blowing operation is completed, the head 10 is returned to the raised position as shown in FIG. 3, and its rotation about the vertical axis A is also stopped. The illustrated device constitutes a part of the turntable, and is performed while rotating as the turntable rotates. Further, at the same time as the glass blowing operation is completed, the mold 84 is opened, and then, as the turntable rotates, it is transported to a cutting area where a cutter is located.

Although the rotation axis of the turntable is not shown in detail, it is assumed that it is on the right side in FIGS. 2 and 3. A column 86 supports the turntable, and a bracket structure 88 is attached to the upper end of the column to support and rotate the head 10 and support mechanism 16. Rotation of the apparatus including head 10 and support mechanism 16 is adapted to be stopped just before reaching the cutting zone, when fan 24 and sprocket 32 are radially outward relative to the turntable. I'm planning on coming.

When the head 10 is raised to the raised position as shown in FIG. Since the plate-shaped projection 30 is rotated counterclockwise around the
The hold is released. Thus, the plate-like projection 30 and the workbench 26 are again in the state shown in FIG. 2.

When the cutting area is reached, the pusher member 90 is driven by an actuator 92 carried by the bracket structure 88 to abut the trochanter 50. This extrusion member 90 is in contact with the trochanter 50 and
, the swing lever 38 swings about the pin 34 in a direction opposite to the direction indicated by arrow C against the biasing force of the torsion spring 52. As a result, the sprocket 32 supported by the swinging lever 38 is also lifted upward along an arcuate trajectory centered on the axis of the pin 34, and at the same time, the hanging portion 2
The second fan-shaped member 24 rolls by engaging with the tooth groove. Sprocket 3 supported by swing lever 38
2 is also integrally connected to the workbench 26, so when the sprocket 32 rolls and is lifted upward as described above, the workbench 26 moves in the direction shown by arrow E in FIG. It is flipped to the reversed position. FIG. 3 shows the workbench 26 inverted to the inverted position. At this time, the glass product V, which has already been separated from the mold 84, is turned upside down with the extra flange CL facing downward, as shown by the dotted line in FIG.

A disk-shaped rotary cutter 94 is disposed in the cutting area, and when the workbench 26 is in the reverse position, it is approximately flush with the lower surface of the workbench 26 (however, the upper surface when the workbench 26 is in the working position). The cutting blade of the cutter 94 is placed at the end. Then, as the cutter 94 rotates, the excess flange CL of the glass product V is cut out along the lower surface of the workbench 29. The excised excess flange falls onto a conveyor or collection box (not shown) disposed below.

Although the excess flange CL was removed, the glass product V still held in the hole 28 of the workbench 26 is
It is held by a take-out member (not shown). Then, as shown in FIG. 3, the pushed-out member 90 that has descended is raised, and the swing lever 38 is moved in the direction of arrow C by the action of the torsion spring 52.
When the work table is returned from the inverted position to the work position shown in FIG. 2 by swinging, the glass product V is taken out from the work table 26 while being held by the take-out member. Thus, as the workbench 26 returns to its working position, it becomes ready for blowing glass products during the next cycle.

The shape of the hole 28 in the workbench 26, that is, the inlet port, is such that it gradually widens outward in the radial direction toward the bottom when viewed from FIG. 2, that is, toward the side where the glass product is formed. Therefore, it is easy to remove the glass product from the workbench 26 after the workbench 26 is rotated to the inverted position and the excess flange CL is removed as described above. Further, the reversal axis of the workbench 26, that is, the axis of the sprocket 32, is configured to move along an arcuate trajectory centered on the horizontal axis B formed by the axis of the pin 34.
is outside the turntable when the workbench 26 is in the inverted position. This, therefore, also facilitates the removal of glassware from the workbench 26.

Furthermore, the workbench 26 is rotated once to the inverted position.
When the head 10 is returned to its working position as shown in FIGS. 1 and 2, the head 10 is lowered again in response to the supply of the next gob of molten glass. And head 1
0, the claw member 68 is rotated in the direction of arrow D by the action of the tension spring 78, and thus engages with the plate-like projection 30 as described above, thereby moving the workbench 26. Lock into working position.

[Brief explanation of the drawing]

1 is a partial perspective view of a device according to a first embodiment of the invention; FIG. 2 is a cross-sectional view taken along the line - in FIG. 1, showing the state when the work platform is in the working position; 3 is a cross-sectional view similar to FIG. 2, showing the state when the workbench is in an inverted position, and FIG. 4 is an end view as seen from the arrow in FIG. 1. 10... blowing head, 16... support mechanism,
26... Workbench, 38... Rocking lever, 52...
torsion spring.

Claims (1)

[Scope of Claims] 1. A workbench equipped with an inlet into which a molten glass gob is poured, and a workbench located above the inlet to press down the molten glass gob and pour the molten glass into the mold through the inlet. a rotary glass blowing head for blowing out a lump; a disk-shaped cutter for cutting off an excess flange of solidified glass around the edge of the inlet that is flush with the workbench; and means for reversing the workbench. The workbench is mounted on a support rotatable together with the head and rotated by the reversing means around an inversion axis over 180 degrees between a working position and an inverted position in which the extra flange of the glass faces downward. the cutter is pivotally mounted on the inlet side so as to be inverted when the workbench is in the inverted position; In the glass product manufacturing apparatus, the reversing means is supported by a horizontal shaft at an intermediate point of the support, and one end on which a downward extrusion force is applied from the extrusion member and the workbench are connected to a sprocket. and the other end that supports the sprocket so as to be freely reversible about a horizontal axis, and the sprocket includes:
engaging a toothed sector fixed to the support and whose axis coincides with the axis of the swinging lever;
The apparatus for manufacturing blown glass products is further characterized in that the swing lever is biased by elastic means in a direction opposite to the extrusion force of the extrusion member in order to return the workbench to the working position. 2. The device according to claim 1, wherein the elastic means is a torsion spring. 3. The device according to claim 1 or 2, wherein the locking means for locking the workbench in the working position is pivotable on the support about a horizontal axis, and This locking means is constituted by a pawl member that engages with the head from above, and when the workbench is in the working position, it is elastically returned to the lowered position and wedge-shaped engages with the right-angled protrusion on the workbench. However, when the claw member is raised by the action of the head, the wedge-shaped engagement between the claw member and the right-angled protrusion is released.