JP2000108127A - Synthetic resin supplying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry a synthetic resin cut off from an extrusion nozzle being held as it is to a compression molding device. SOLUTION: This device supplies a synthetic resin 100 extruded from an extrusion nozzle 2 to a compression molding device. In this case, this device is equipped with cutting and holding mechanisms 200, which are carried so as to pass through an accepting position opposing to the extrusion nozzle 2 and a discharging position locating opposite to the required part of the compression molding device. The cutting and holding mechanism 200 includes a cutting means for cutting the synthetic resin 100 extruded through an extrusion opening 2a at its carrying through the accepting position and a holding means for selectively holding the synthetic resin 102 to be cut with the cutting means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthesizing method in which a molten synthetic resin extruded from an extrusion opening of an extrusion nozzle is cut by cutting means, and the cut synthetic resin is held by holding means and supplied to a molding apparatus. The present invention relates to a resin supply device.

[0002]

2. Description of the Related Art As containers for beverages and the like, containers made of a synthetic resin made of an appropriate synthetic resin such as polyethylene terephthalate are widely and practically used. A preform (preform) to be made into a synthetic resin container by blow molding is generally integrally formed by compression molding in a compression molding apparatus. In performing such compression molding, supply (conveyance) of the synthetic resin in a molten state extruded from the extrusion opening of the extrusion nozzle to the compression molding apparatus is performed as follows. The synthetic resin heated and melted in the extruder is extruded from an extrusion opening of an extrusion nozzle provided in the extruder, and the synthetic resin extruded from the extrusion opening is cut by an appropriate cutting means and cut off from the extrusion opening. The cut synthetic resin (the synthetic resin to be cut) is supplied to a synthetic resin receiving means provided in the transfer mechanism.
The receiving means is selectively set to a closed state for receiving the synthetic resin and an open state for discharging the received synthetic resin downward, and is moved intermittently at every 90 ° around the rotation axis. The synthetic resin received by the receiving means in the closed state is intermittently moved to a position above the female mold provided in the compression molding apparatus, and then is discharged downward by opening the receiving means (dropping). ) And transferred to a female mold. The synthetic resin transferred to the female mold is compression molded in cooperation with the male mold provided in the compression molding device,
A preformed body having a required shape is formed. An apparatus for separating a synthetic resin in a molten state from an extrusion opening of an extrusion nozzle and supplying the same to a compression molding apparatus as described above is disclosed in, for example, JP-A No. 2-13 / 1990.
No. 4,222,422.

[0003]

In the above-mentioned conventional apparatus for supplying synthetic resin, the synthetic resin separated from the extrusion opening of the extrusion nozzle is provided with a receiving means which is disposed in a transfer mechanism and is set in a closed state. Once received, the receiving means is transported to a position above the female mold of the compression molding device by intermittent movement, and is supplied to the female mold only by setting the receiving means to the open state. The form of conveyance and the configuration of the entire transfer mechanism are complicated. As a result, the cut synthetic resin cannot be smoothly and stably supplied to the female mold of the compression molding apparatus. Also, the transfer time of the synthetic resin from the extrusion nozzle to the compression molding device becomes relatively long,
Production efficiency decreases. Furthermore, the cost of the entire apparatus is increased.

[0004] The present invention has been made based on the above fact, and an object of the present invention is to hold a synthetic resin in a molten state separated from an extrusion opening of an extrusion nozzle as it is and transport it to a required portion of a molding apparatus. It is an object of the present invention to provide a novel synthetic resin supply device.

Another object of the present invention is to provide a novel synthetic resin capable of shortening the time required for transporting the synthetic resin from the extrusion opening of the extrusion nozzle to a required portion of the molding apparatus, and thereby improving the production efficiency. To provide a feeding device.

Still another object of the present invention is to provide a novel synthetic resin supply apparatus which has a simple structure and can be manufactured at low cost.

Other objects and features of the present invention will become apparent from the following description of embodiments of a synthetic resin supply device configured according to the present invention, with reference to the accompanying drawings.

[0008]

According to the present invention, there is provided a synthetic resin supply device for supplying a molten synthetic resin extruded from an extrusion opening formed at the tip of an extrusion nozzle to a molding device. A cutting / holding mechanism that is conveyed through a receiving position facing the extrusion nozzle and a discharge position that is positioned opposite a predetermined portion of the molding apparatus, wherein the cutting / holding mechanism is used when the sheet is conveyed through the receiving position. And a cutting means for cutting the synthetic resin extruded from the extrusion opening by being brought close to or in contact with the tip of the extrusion nozzle, and selectively holding the synthetic resin to be cut cut by the cutting means. For holding the synthetic resin to be cut and an open state for releasing the synthetic resin to be cut, wherein the holding means pushes the synthetic resin from the extrusion opening. At the time when the cutting means starts to act on the discharged synthetic resin, it is set to the open state, but at the latest, after the cutting means starts to act on the synthetic resin extruded from the extrusion opening, the clamping state is set. A synthetic resin supply device, wherein the synthetic resin supply device is set so as to sandwich the synthetic resin to be cut, and is set to the open state at the discharge position so that the synthetic resin to be cut is discharged from the holding means. , Are provided.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in more detail with reference to FIGS. In addition, FIG.
In FIG. 9, substantially the same parts are indicated by the same reference numerals.

FIG. 1 shows a synthetic resin supply device 1, an extruder 4 having an extrusion nozzle 2, and a compression molding device 6 as a molding device.
And an unloading mechanism 8 are shown. The synthetic resin supply device 1 configured according to the present invention supplies the synthetic resin 100 in a molten state extruded from an extrusion opening 2 a (see FIG. 2) formed at the tip of the extrusion nozzle 2 to the compression molding device 6. Device.

Referring to FIGS. 1 and 2, an extruder 4 heats and melts and kneads an appropriate synthetic resin material such as polyethylene terephthalate supplied thereto, and conveys the same to a gear pump 4a. Extrusion opening 2
a. The gear pump 4a and the extrusion nozzle 2 are connected by an appropriate conduit means 4b. The extrusion nozzle 2 has an extrusion opening 2a at its lower end, and in this embodiment, the extrusion opening 2a is directed downward in the vertical direction. Since the extrusion opening 2a of the extrusion nozzle 2 has a circular cross section, the synthetic resin 100 in the molten state is extruded vertically downward in a substantially cylindrical shape from the extrusion opening 2a. The compression molding device 6 includes a molding die 7 including a rotating support 6a and a plurality of female dies 7a (see FIG. 4) disposed on the rotating support 6a. The extruder 4 and the compression molding device 6 themselves may have a known configuration, and do not form a feature of the present invention, so that detailed description is omitted.

The synthetic resin supply device 1 has a turntable 9. The turntable 9 is fixed to a rotating shaft 9a. The rotating shaft 9a having a vertical axis is driven to rotate clockwise in FIG. 1 (clockwise as viewed from above in FIG. 2) by a drive source (not shown) which may be an electric motor.
The synthetic resin supply device 1 also has a receiving position P1 (see FIG. 5) facing the extrusion nozzle 2 and a discharge position P1 (see FIG. 5) located facing a predetermined portion p1 (see FIG. 5) of the compression molding device 6. And a cutting / holding mechanism 200 conveyed through. The cutting / holding mechanism 200 includes the turntable 9
Are arranged at equal intervals in the circumferential direction. By the rotation of the turntable 9, the cutting / holding mechanism 200 is transported through the circular transport path. Since the configuration of each of the cutting and holding mechanisms 200 is substantially the same, only one of them will be described below.

The cutting / holding mechanism 200 is a cutting means 10 for cutting the synthetic resin pushed out from the extrusion opening 2a by being conveyed by approaching or contacting the tip of the extrusion nozzle 2 when being conveyed through the receiving position P1. And, for selectively holding the synthetic resin cut by the cutting means 10,
A holding means 20 is provided which is selectively set to a holding state for holding the synthetic resin and an open state for opening the cut synthetic resin. With reference to FIGS. 2 and 6 to 8, the cutting means 10 includes a cutter member 12. The cutter member 12 includes a blade portion 14 having a blade edge 13 extending linearly, and a mounting portion 15 formed integrally with the blade portion 14. The mounting portion 15 having a predetermined thickness and a rectangular shape is formed with two mounting holes 16 and 18. The blade portion 14 is provided at one end surface 15a of the mounting portion 15 in the longitudinal direction.
, And is arranged so as to extend linearly and inclining toward one side in the width direction of the mounting portion 15. Cutter member 12
Are configured to extend horizontally as a whole. FIG.
The rake face 14a having a rake angle α and the flank face 14b having a clearance angle β
Are formed. The rake angle α and the clearance angle β are preferably set to 30 ° to 40 °, respectively, from the viewpoint of securing good machinability. Note that an arrow C in FIG. 8 indicates a horizontal cutting direction (a moving direction of the blade edge 13).

The cutter member 12 is attached via a mounting portion 15
It is attached to the lower surface side of the turntable 9 together with a first holding member 30 of the holding means 20 described later. Cutter member 1
With the 2 attached to the turntable 9, the cutting edge 13 of the cutter member 12 is positioned so as to protrude horizontally from the periphery of the turntable 9 radially outward of the turntable 9. As shown in FIG. 1, the extrusion nozzle 2 of the extruder 4 has its extrusion opening 2a manually or by a driving source (not shown) such as an air cylinder.
However, when the turntable 9 is rotated, the action position is located at a predetermined interval vertically above the rotation trajectory of the blade edge 13 of the cutter member 12 when the turntable 9 is rotated. It is configured to be selectively located in the working position. Therefore, the extrusion opening 2a of the extrusion nozzle 2 is positioned at the above-mentioned operation position,
a, the synthetic resin 100 is extruded from the turntable 9.
Is rotated, the cutting edge 13 of the cutter member 12 becomes
The synthetic resin 100 extruded vertically downward from the extrusion opening 2a can be cut horizontally by vertically traversing vertically below the extrusion opening 2a of the extrusion nozzle 2 with the above-mentioned predetermined gap. In this specification, the cut synthetic resin 10 is used.
0 is referred to as the cut synthetic resin 102 (see FIGS. 3 and 4).

The holding means 20 includes a first holding member 30 and a second holding member 40. First holding member 30
A mounting portion 32 having a predetermined thickness and a substantially rectangular shape; and a vertically extending predetermined length from the lower surface of one side in the width direction of the mounting portion 32 and one end in the longitudinal direction. 32
and an upstream wall 34 extending substantially linearly from a first end extending from one side of the mounting portion 32 toward the other side substantially at a right angle from the front end of the upstream wall 34 and parallel to one end 32a of the mounting portion 32. And a holding wall 36. The upstream wall 34 and the first holding wall 36 have a substantially L shape in a plan view. The mounting portion 32 has two mounting holes 37 and 38 formed therein. The upstream wall 34 has one end 32 along one side of the mounting portion 32.
a extends to substantially the middle in the longitudinal direction. Mounting part 32
The length from the upper surface to the lower end surface of the upstream wall 34 and the first holding wall 36 is substantially the same, and the upper end surface of the upstream wall 34 and a part of the upper end surface of the following first holding wall 36 are substantially the same. Is positioned on a plane coinciding with the upper surface of the mounting portion 32, and the other portion (the tip portion) of the upper end surface of the first holding wall 36 is formed slightly higher than the plane.

At predetermined positions on the periphery of the turntable 9, two screw holes 9a and 9b are spaced apart in the radial direction.
Are formed. A state in which the upper surface of the attachment portion 15 of the cutter member 12 is overlapped on the lower surface of the peripheral portion of the turntable 9 at the predetermined position, and the upper surface of the attachment portion 32 of the first holding member 30 is overlapped on the lower surface of the attachment portion 15. And turntable 9
The screw hole 9a of the turntable 9, the mounting hole 16 of the cutter member 12 and the mounting hole 37 of the first holding member 30 are aligned substantially on the same axis.
The second mounting hole 18 and the mounting hole 38 of the first holding member 30 are aligned substantially on the same axis, and the flanged bolt 39 is connected to the corresponding screw hole 9a through the mutually aligned mounting holes.
And 9b. As described above, the cutter member 12 is attached to the lower surface of the peripheral portion of the turntable 9 at the predetermined position, and the first holding member 30 of the holding means 20 is detachably attached below the cutter member 12.

Referring to FIGS. 2, 6 and 9, the second holding member 40 of the holding means 20 has a rectangular substrate portion 42.
And a second holding wall 44 arranged upright on one end of the substrate portion 42. At the position near the other end of the substrate portion 42, four columns 46 are arranged upright, and a supported member 48 is fixed to the upper end of each column 46. Substrate part 4
A second clamping wall 4 extending along one end of the second holding end 2
Reference numeral 4 denotes a substantially rectangular shape as a whole, and
The upper end of one end of 4 is formed slightly higher than the upper ends of the other portions. The supported member 48 has a predetermined thickness and has a rectangular shape. A support member 50 is attached to the lower surface of the turntable 9 radially inward of the predetermined position by appropriate fixing means (not shown). The support member 50, which has a rectangular shape in plan view, has a channel shape with an open bottom, and on both sides of a lower end thereof, support flanges 52 extend in directions facing each other, and
0 is disposed so as to extend linearly and horizontally from one end to the other end. Since the supported member 48 is slidably supported on each support flange portion 52 of the support member 50, the second holding member 40 is supported movably in the radial direction of the turntable 9.

A support bracket 5 extending vertically downward from the lower surface of the turntable 9 radially inward of the predetermined position (radially outward of the support member 50).
4 is attached by appropriate fixing means (not shown). The support bracket 54 is formed of a plate member extending in a band shape with a predetermined width and having an upper end bent at a right angle. The upper end is attached to the lower surface of the turntable 9, and the lower end is a substrate part of the second holding member 40. 42 are spaced upwardly from the upper surface of 42. Support bracket 5
The width direction of 4 is made coincident with the longitudinal direction of the substrate portion 42, that is, the radial direction of the turntable 9. At the lower end of the support bracket 54, a rectangular support portion 56 is formed by being bent at a right angle. The main body 62 of the solenoid 60 is fixed to a support 56 extending in the width direction of the substrate 42. Main body 62 of solenoid 60
Inside, a rod-shaped iron core 64 is disposed movably in the axial direction, and both ends of the iron core 64 protrude from both axial ends of the main body 62. The solenoid 60 is positioned so as to extend in the longitudinal direction, that is, in the radial direction of the turntable 9, with an interval upward from the upper surface of the substrate portion 42.

On the upper surface of the substrate portion 42, the solenoid 6
0 between the one end side in the axial direction and the second holding wall 44,
The plate member 65 is provided upright. One end of an iron core 64 of the solenoid 60 is fixed to a plate member 65. A locking pin 6 is provided on the upper surface near the other end of the substrate portion 42.
6 is provided upright. At the upper end of the locking pin 66, a curled locking portion is formed. Turntable 9
Radially inward of the predetermined position (the support member 5).
Further, a locking plate 67 extending vertically downward from the lower surface of the locking plate 67 is mounted on the inner side (radially inward from 0) by appropriate fixing means (not shown). The locking plate 67 extends in a band shape with a predetermined width, the upper end is bent at a right angle, the upper end is attached to the lower surface of the turntable 9, and the lower end is spaced upward from the other end of the solenoid 60. Be positioned. A locking hole is formed at the lower end of the locking plate 67. A tension coil spring 68 is provided between the locking portion of the locking pin 66 of the board portion 42 and the locking hole of the locking plate 67 of the turntable 9. When the solenoid 60 is not energized (not energized), the second holding member 40 is pulled radially inward of the turntable 9 by the tension coil spring 68 and is positioned at a predetermined home position. Second holding member 4
0, the stop ring 64a provided on the outer peripheral surface at one end of the iron core 64 of the solenoid 60 is
It is defined by contacting one end of the main body 62 to prevent the movement of the iron core 64 (see FIG. 2).

Referring to FIG. 1, a rotary support 6a of a compression molding apparatus 6, which may have a well-known configuration, is synchronized with a turntable 9 by a drive source (not shown) which may be an electric motor. It is driven to rotate counterclockwise. A plurality of molds 7 are provided at equal intervals in the circumferential direction of the rotary support 6a. The molding die 7 which may have a well-known configuration is a female die 7a having an open top (see FIG. 4).
And a male mold (not shown). Male type is female type 7a
Are arranged vertically above and at intervals.

Referring to FIGS. 2, 5 and 6, when the second holding member 40 is positioned at the predetermined home position as described above, the first holding wall 36 and the second holding The holding wall 44 is positioned so as to be opposed to the conveying direction of the cutting / holding mechanism 200 in the lateral direction at an interval. In the embodiment, when viewed in the radial direction of the circular transport path, the first holding wall 36 is positioned radially outward, and the second holding wall 44 is positioned radially inside. In addition, the upstream wall 34 is arranged on the upstream side in the transport direction of the cutting and holding mechanism 200 (clockwise direction which is the rotation direction of the turntable 9 in FIG. 5). The first holding wall 36, the second holding wall 44, and the upstream wall 34 cooperate with each other to define a receiving space S whose upper side and lower side are open on the downstream side as viewed in the transport direction of the cutting and holding mechanism 200. As will be easily understood from the following description, the first holding member 3 of the holding means 20 will be described.
At least one of the first and second clamping members 40 (the second clamping member 40 in this embodiment) is movably mounted between a clamping position and an open position (home position). By positioning at least one of the holding member 30 and the second holding member 40 at the holding position, the holding means 20 is set to the holding state, and the first holding wall 36 is set.
The holding means 20 is opened by holding the synthetic resin 102 to be cut between the first holding member 30 and the second holding member 40 at the open position. Set to state. In the embodiment, by moving the second holding member 40 in the radial direction of the circular transport path, the second holding member 40 is selectively positioned at the holding position and the opening position, and
Are selectively set to a holding state and an opening state.

When the holding means 20 is in the open state, the first holding wall 36, the upstream wall 34, and the second holding wall 44 are respectively arranged to extend vertically, and the first holding wall 36 has a radius of the turntable 9. The upstream wall 34 is positioned at a fixed position on the upstream side in the rotation direction of the turntable 9, which is the conveying direction of the cutting and holding mechanism 200, substantially at a fixed position on the outer side in the direction of the turntable 9. The second holding wall 44 is positioned so as to extend in the radial direction of the turntable 9, and faces the first holding wall 36 radially inward of the turntable 9 at a distance from the first holding wall 36. It is positioned to extend tangentially. Then, as described above, the first holding wall 36 and the upstream wall 3
The receiving space S for the synthetic resin 100 extruded from the extrusion opening 2 a of the extrusion nozzle 2, which is open at the upper, lower, and downstream sides in the rotation direction of the turntable 9 by being surrounded on three sides by the fourth and second holding walls 44. Is formed. The cutting edge 13 of the cutter member 12 is positioned so as to extend above the receiving opening S in a radially outward direction and incline to the upstream side when viewed in the rotation direction of the turntable 9, and the center line O1 of the receiving space S. (In the embodiment, extends near the center line O1). The movement of the second holding member 40 from the open position to the holding position is performed by biasing a solenoid 60 which is a moving unit for moving the second holding member 40 to the outside of the turntable 9 in the radial direction, The movement of the second holding member 40 from the holding position to the open position is performed by the deenergization of the solenoid 60 and the tensile force of the extension coil spring 68.

Referring mainly to FIG. 1, FIG. 2, FIG. 5, and FIG. 6, when supplying synthetic resin in a molten state,
Of the extrusion nozzle 2 is positioned at the operation position, and the synthetic resin starts to be continuously extruded from the extrusion opening 2a of the extrusion nozzle 2 by the operation of the gear pump 4a. The turntable 9 and the rotary support 6a of the compression molding device 6 are rotated in synchronization with each other by the respective driving sources (the rotational direction of the turntable 9 is clockwise in FIGS. 1, 5 and 6; The clockwise direction viewed from above in FIG. 2 and the rotation direction of the rotary support 6a are counterclockwise in FIGS. 1 and 5). When the turntable 9 and the rotary support 6a are rotated synchronously, the cutting / holding mechanism 20 is rotated.
After each of the nozzles 0 sequentially passes vertically below the extrusion opening 2a of the extrusion nozzle 2, the holding means 20 is sequentially aligned with each of the female dies 7a of the molding die 7 at a position vertically above the female dies 7a. Of course, the cutter member 12 of the cutting means 10 can also be sequentially passed vertically below the extrusion opening 2a of the extrusion nozzle 2. Since the configuration, operation, and effect of each of the cutting and holding mechanisms 200 are substantially the same, the configuration, operation, and effect of one of the cutting and holding mechanisms 200 will be described below.

The rotation of the turntable 9 causes the second holding member 40 to be positioned at the open position.
Is moved to the vertically lower position of the extrusion opening 2a of the extrusion nozzle 2 positioned at the operation position together with the cutter member 12, in other words, when it is positioned at the vertically lower receiving position (FIGS. 2, 5 and 5). The position P1) shown in FIG.
As shown in FIG. 5, when viewed from above in FIG. 5, the first holding wall 36, the upstream wall 34, and the second holding wall 44 of the holding means 20 are each formed around the extrusion opening 2 a of the extrusion nozzle 2. Are positioned radially outward with a gap. In addition, the center of the receiving space S and the center (O1) of the extrusion opening 2a of the extrusion nozzle 2 are substantially aligned when viewed in the radial direction of the circular transport path. At this time, the synthetic resin 100 is extruded vertically downward from the extrusion opening 2 a of the extrusion nozzle 2.
6, the upstream wall 34 and the second sandwiching wall 44 are positioned with a gap radially outward of the outer peripheral surface of the synthetic resin 100 extruded from the extrusion opening 2a.
As described above, the receiving space S in which the upper side and the lower side in the vertical direction and the downstream side in the rotation direction of the turntable 9 are opened by being surrounded on three sides by the first holding wall 36, the upstream wall 34, and the second holding wall 44. Is formed, the synthetic resin 100 is received substantially in the center of the receiving space S without interfering with the first holding wall 36, the upstream wall 34, and the second holding wall 44.

As shown in FIGS. 5 and 6, the position P1
, The cutting edge 13 of the cutter member 12 extends obliquely with respect to a straight line L1 passing through the axis O2 of the turntable 9 and the axis O1 of the extrusion opening 2a of the extrusion nozzle 2, and the extrusion opening of the extrusion nozzle 2. The axis 2a is positioned so as to intersect with the straight line L1 in the vicinity of the axis O1 or the axis O1 (in the embodiment, as shown in FIGS. 5 and 6,
(It is positioned so as to intersect the straight line L1 near the axis O1 and radially outside the turntable 9). The inclination is such that the outer edge of the cutting edge 13 of the cutter member 12 in the radial direction from the point intersecting the straight line L1 is located upstream of the straight line L1 in the rotation direction of the turntable 9 and intersects the straight line L1. The inner side in the radial direction than the straight line L
It is defined to be located downstream of the turntable 9 in the rotation direction of the turntable 9. The inclination angle γ between the cutting edge 13 of the cutter member 12 and the straight line L1 is defined as 15 ° to 45 °.
In FIG. 2, a line L2 indicates a vertical axis passing through the axis O1 of the opening 2a of the nozzle 2, and a line L3 indicates a vertical axis passing through the axis O2 of the turntable 9.

As is clear from FIGS. 5 and 6, and the above description, at the position P1, the cutting edge 13 of the cutter member 12 is moved downward from the extrusion opening 2a of the extrusion nozzle 2 by the synthetic resin 100. It is in a state where a little more than half in the radial direction is cut horizontally (and is being cut). Almost simultaneously with the further rotation of the turntable 9, the solenoid 60 is biased, and the second holding member 40 is moved from the open position to the holding position. The holding means 20 is set from the open state to the sandwiched state. As a result, the synthetic resin 1
00 is slightly moved radially outward of the turntable 9 by the second holding wall 44 at or immediately after the cutting edge 13 of the cutter member 12 is completely cut by the cutting edge 13, and the first holding wall 36 and Between the two.

The holding means 20 is set to the open state at the time when the cutter member 12 starts to act on the synthetic resin 100 extruded from the extrusion opening 2a, but at the latest, the synthetic resin 100 extruded from the extrusion opening 2a. It is important that the cutting resin 12 is set to be in the sandwiching state after the cutter member 12 starts to operate, and that the synthetic resin 102 to be cut is sandwiched. In particular, by sandwiching the synthetic resin 100 at the time when it is completely cut by the blade edge 13 of the cutter member 12 or immediately thereafter, the cut surface is made clean, and the pre-formed body after compression molding is formed as required. Is guaranteed to be done. The cut synthetic resin 100 tends to adhere to the rake face 14a of the cutter member 12 due to its viscosity and be in a suspended state. However, the cut synthetic resin 100 is pushed out of the rake face 14a by the pushing action due to the movement of the second sandwiching wall 44. The withdrawal is effectively performed. As described above, it is not possible to cause the holding means 20 to hold the sheet at the time when the sheet is completely cut or immediately thereafter.
The departure is performed more effectively. Second holding wall 4
The pushing action caused by the movement of the cutting tool 4 makes the detachment from the rake face 14a as effective as the above even if the holding means 20 is held immediately before the cutting edge 13 is completely cut. It is possible to do. Cutter member 12 of synthetic resin 100 extruded from extrusion opening 2a
When cutting by the method described above, it is required that the posture of the synthetic resin 100 be maintained as required and that the cutting be performed effectively (ensure the required cutting ability). In the present invention, since the cutting edge 13 of the cutter member 12 is configured to extend at an inclination angle γ of 15 ° to 45 ° with respect to the radial direction of the circular transport path, the two requirements are sufficiently ensured. Can be satisfied. If the synthetic resin 100 is clamped at a time later than immediately after the cutting edge 13 of the cutter member 12 completely cuts, the synthetic resin 102 to be cut may hang down from the extrusion opening 2a, and is preferably used. Absent. FIG. 3 shows the synthetic resin 10
0 shows a state immediately after being cut by the cutter member 12 and held by the holding means 20.

When the cutter member 12 is transported through the receiving position P1, the cutter member 12 pushes the extrusion opening 2 which is the tip of the extrusion nozzle 2.
a. In any of these, it is possible to cut the synthetic resin 100,
A gap of 0.05 mm to 0.3 mm between the blade edge 13 of the cutter member 12 and the extrusion opening 2a (reference numeral D in FIG. 8)
It is preferable that the sheet is conveyed with a gap (shown by). If the interval D is too large, problems such as deterioration of the cutting ability, dirt on the tip surface of the extrusion nozzle 2 and deterioration of the finish of the outer surface of the synthetic resin 102 to be cut occur. The setting of the gap D solves these problems.

In the position P1, the holding means 20
Of the synthetic resin 100 extruded from the extrusion opening 2a of the extrusion nozzle 2 with a gap radially outward (upstream in the rotation direction of the turntable 9). Therefore, even if a spin of the synthetic resin 100 (a spin in which the lower end of the synthetic resin 100 moves to the upstream side in the rotation direction of the turntable 9) due to the impact applied by the cutter member 12 at the time of cutting occurs, Is restrained by the upstream wall 34 and is reliably prevented. The holding means 20 is located at the position P1
While the second holding member 40 is moved from the open position to the holding position as described above,
The synthetic resin 1 to be cut from the open state to the sandwiched state
02 is pinched. By the further rotation of the turntable 9, the synthetic resin 102 to be cut is conveyed downstream through the circular conveying path while being held by the holding means 20. At a predetermined upstream position from the discharge position P2 (the position of the female mold 7a which is a required part of the compression molding apparatus 6 is p1), where the holding means 20 is aligned vertically above the female mold 7a of the molding die 7, When the second holding member 40 is moved from the holding position to the opening position, the holding state is released from the holding state, and the holding of the synthetic resin 102 to be cut is released. To release the clamping, the solenoid 60 is deenergized, and the second clamping member 40 (therefore, the second clamping wall 44) moves radially inward of the turntable 9 by the spring force of the extension coil spring 68. Sedated,
Performed by returning to the home position. The cut synthetic resin 102 from which the sandwiching between the first sandwiching wall 36 and the second sandwiching wall 44 has been released starts free fall in a substantially upright posture as clearly shown in FIG. . When the holding means 20 is moved from the predetermined upstream position to the position P2, the cut synthetic resin 102 is completely separated from the holding means 20 and moves to the position p1.
And the female mold 7 moved to the position P2.
It falls freely at the center of a.

The cutter member 12 is made of a material having a relatively high heat conductivity, for example, brass. The turntable 9, the first holding member 30, the second holding member 40, and the like also have a relatively high heat conductivity. It is formed of a high material, for example, an aluminum alloy. As described above, the second holding wall 44 is moved inward in the radial direction of the turntable 9 and the distance between the second holding wall 44 and the first holding wall 36 is increased, thereby holding the synthetic resin 102 to be cut. Released and cut synthetic resin 1
02 is allowed to fall freely. At this time, it is desired that the cut synthetic resin 102 be quickly separated from the wall surfaces of the first holding wall 36, the second holding wall 44, and the upstream wall 34 to be freely dropped. In the present invention, as described above, the synthetic resin 102 cut by the cutter member 12 is conveyed only by being sandwiched between the second sandwiching wall 44 and the first sandwiching wall 36. Is relatively small, and the first holding wall 36, the upstream wall 34, and the second holding wall 44 are formed of a material having a relatively high thermal conductivity and are maintained at a relatively low temperature. Due to the fact that the synthetic resin 102 does not easily adhere (become slippery) or the like, the synthetic resin 102 to be cut off from the first holding wall 36, the second holding wall 44, and the upstream wall 34 relatively quickly is free to separate. It is dropped and smooth and stable supply is performed. Although not shown, the first holding member 30 including the cutter member 12 including the blade portion 14, the first holding wall 36 and the upstream wall 34.
And a circulating flow path of a cooling medium, which may be cooling water, is formed inside the second holding member 40 including the second holding wall 44 and the cooling medium is continuously supplied to the circulating flow path. The member can be cooled more effectively. as a result,
The cut synthetic resin 102 is more quickly and surely detached from the first holding wall 36, the second holding wall 44, and the wall surface of the upstream wall 34, and is allowed to fall freely, so that a smoother and more stable supply is performed. You. In this embodiment, the above effects are further promoted because the inner wall surfaces of the first holding wall 36, the upstream wall 34, and the second holding wall 44 are substantially flat and extend vertically. . First holding wall 36, upstream wall 3
4 and the inner wall surface of the second holding wall 44 and the synthetic resin 10 to be cut.
In order to further reduce the area of contact with the inner wall 2 and to make it more slippery, at least the surface of the inner wall surfaces of the first holding wall 36 and the second holding wall 44 that comes into contact with the synthetic resin 102 to be cut is made matte. Is preferred. Needless to say, at least the synthetic resin 102 on the inner wall surface of the upstream wall 34 is also cut.
It is even more preferable to make the surface in contact with the surface matte.
According to the experiments of the present inventors, the free fall of the synthetic resin 102 to be cut is smoothly performed by applying satin on the inner wall surfaces of the first holding wall 36, the upstream wall 34, and the second holding wall 44. Was confirmed. There is a concern that the free fall as described above may be affected by fluctuations in the atmosphere and the like. To alleviate this concern, for example, when the holding unit 20 is set from the sandwiched state to the open state, the synthetic resin 102 to be cut may be used.
A means for injecting compressed air from above to forcibly drop the synthetic resin 102 to be cut is also conceivable.

The rotation of the turntable 9 causes the holding means 2 to rotate.
When 0 passes through the position P2 and reaches the position P1 again, the cutting of the synthetic resin 100 is performed again, and then the above operation is repeated. On the other hand, when the female mold 7a of the molding die 7 that has received the synthetic resin 102 to be cut at the position p1 reaches the position p2 by rotation of the rotary support 6a, a male mold (not shown) disposed vertically above the female mold 7a. Starts descending, compression molding is started at a position p3, and compression molding is completed at a position p4. By the above operation, a preformed body (not shown) is formed. By the time the female mold 7a reaches the take-out mechanism 8 (see FIG. 1) due to the rotation of the rotary support 6a, the male mold is raised, and at a predetermined position vertically separated from the female mold 7a and the preformed body. Will be returned. Female mold 7a containing preformed body
Reaches the removal mechanism 8 (see FIG. 1) disposed at a predetermined upstream position from the position p1, the preformed body in the female mold 7a is separated by the female mechanism by the removal mechanism 8, which may have a well-known configuration. 7a and taken out in the direction of arrow A in FIG.
When the female mold 7a from which the pre-formed body has been taken out reaches the position p1 again, the synthetic resin 102 to be cut is freely dropped from the holding means 20 which has reached the position P2, and then the above operation is repeated. As is apparent from the above description, the turntable 9 and the rotary support 6a are rotated in synchronization with each other, so that each of the holding means 20 is sequentially positioned with respect to each of the female dies 7a of the molding die 7 at a position vertically above the female dies 7a. When one of the holding means 20 is aligned with one of the female molds 7a of the mold 7, the cut synthetic resin 102 held by the one of the holding means 20 is aligned.
The second holding wall 44 of the holding means 20 is moved from the holding position to the open position so that the second holding wall 44 of the holding means 20 can be freely dropped on the one female mold 7a of the molding die 7. In addition, in FIG. 5 and FIG.
A part of a circle passing through the axis O1 of the extrusion opening 2a of the extrusion nozzle 2 around the axis O2 of the extrusion nozzle 2 and thus passing through the center O1 of the receiving space S in the open state, and a line L5 represents
A circle (FIG. 5) and a part of the circle (FIG. 5) centered on the axis O2 of the turntable 9 and passing through the center of the receiving space S in the sandwiched state (therefore, the substantial axis of the held synthetic resin 102). 6).

As described above, the present invention has been described in detail based on the embodiments with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and furthermore, does not depart from the scope of the present invention. Various other variations or modifications are possible. For example, in the above embodiment, the turntable 9
A plurality of cutting / holding mechanisms 200 are arranged at equal intervals in the circumferential direction, and the forming dies 7 including the female molds 7a are provided at equal intervals in the circumferential direction on the rotating support 6a of the compression molding device 6. In this embodiment, one cutting / holding mechanism 200 is provided on the turntable 9 and one forming die 7 is provided on the rotary support 6a. Further, in the above embodiment, the holding and release (opening) of the synthetic resin 102 to be cut by the holding means 20 is performed by the second holding wall 4.
4 is moved in the radial direction of the turntable 9 with respect to the first holding wall 36 positioned at a fixed position, but of course, the second holding wall 44 is fixed. Position, this second clamping wall 4
An embodiment in which the first holding wall 36 is moved in the radial direction with respect to 4 to perform the holding and the holding release, or each of the second holding wall 44 and the first holding wall 36 is movable, There may be an embodiment in which the above-described holding and releasing are performed by moving each of the second holding wall 44 and the first holding wall 36 toward and away from each other. Furthermore, in the above-described embodiment, the cutting / holding mechanism 200 is configured to be conveyed through the circular conveyance path in accordance with the rotation of the turntable 9, but the form of the conveyance path is not limited to a circular shape. It is needless to say that various forms of the above can be appropriately implemented.

[0033]

According to the synthetic resin supply device of the present invention, it is possible to hold the synthetic resin in the molten state cut off from the extrusion opening of the extrusion nozzle as it is and transport it to a required portion of the molding device. In addition, it is possible to shorten the time required for transporting the synthetic resin from the extrusion opening of the extrusion nozzle to a required portion of the molding device, and thus to improve production efficiency. Furthermore, it can be manufactured simply and at low cost.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing an embodiment of a synthetic resin supply device configured according to the present invention and a configuration of a related device.

FIG. 2 is a side view of a main part of an embodiment of the synthetic resin supply device configured according to the present invention, showing a side view showing one operation mode.

FIG. 3 is a side view showing another operation mode of the synthetic resin supply device shown in FIG. 2;

FIG. 4 is a side view showing still another operation mode of the synthetic resin supply device shown in FIG. 2;

FIG. 5 is a perspective view for explaining the operation of the synthetic resin supply device configured according to the present invention shown in FIGS.

FIG. 6 is a view of a part of FIG. 2 viewed from above.

7 is an exploded perspective view showing a cutter member and a part of holding means in the synthetic resin supply device shown in FIG. 2;

FIG. 8 is a sectional view taken along the line BB in FIG. 7;

9 is an exploded perspective view showing another part of the holding means in the synthetic resin supply device shown in FIG. 2 and a configuration related thereto.

[Explanation of symbols]

 Reference Signs List 2 extrusion nozzle 2a extrusion opening 4 extruder 6 compression molding device 9 turntable 10 cutting means 12 cutter member 13 blade edge 14 blade portion 20 holding means 30 first holding member 34 upstream wall 36 first holding wall 40 second Holding member 44 Second holding wall 60 Solenoid 64 Iron core 68 Tension coil spring 100 Synthetic resin 102 Synthetic resin to be cut 200 Cutting / holding mechanism

Claims (8)

[Claims] 1. A synthetic resin supply device for supplying a synthetic resin in a molten state extruded from an extrusion opening formed at a tip of an extrusion nozzle to a molding device, comprising: a receiving position facing the extrusion nozzle; A cutting / holding mechanism that is conveyed through a discharge position located opposite to a predetermined portion of the molding apparatus, wherein the cutting / holding mechanism approaches or contacts the tip of the extrusion nozzle when conveyed through the receiving position. Cutting means for cutting the synthetic resin which has been conveyed and extruded from the extrusion opening, and holding the cut synthetic resin for selectively holding the cut synthetic resin cut by the cutting means. And holding means selectively set to an open state to open the synthetic resin to be cut, wherein the holding means applies the cutting means to the synthetic resin extruded from the extrusion opening. Is set to the open state at the time when it starts to act, but is set to the sandwiching state after the cutting means starts to act on the synthetic resin extruded from the extrusion opening at the latest, and the synthetic resin to be cut is set. A synthetic resin supply device, wherein the synthetic resin supply device is set in the open state at the discharge position, and the cut synthetic resin is discharged from the holding means. 2. The synthetic resin supply according to claim 1, wherein the holding means is set to the sandwiching state at the time when the synthetic resin extruded from the extrusion opening is completely cut by the cutting means or immediately thereafter. apparatus. 3. The extrusion opening is oriented vertically downward, the cutting means is passed below the extrusion nozzle, and the holding means is disposed below the cutting means. Item 3. The synthetic resin supply device according to Item 1 or 2. 4. The holding means includes a first holding member having a first holding wall and a second holding member having a second holding wall, wherein the first holding wall and the second holding member are provided. The wall is opposed to the wall at an interval in the lateral direction with respect to the transport direction of the cutting / holding mechanism, and at least one of the first holding member and the second holding member is in a holding position and an opening position. The holding means is set in the holding state by positioning at least one of the first holding member and the second holding member at the holding position. Holding the synthetic resin to be cut between a first holding wall and the second holding wall, and positioning at least one of the first holding member and the second holding member at the open position. 4. The synthetic resin supply means according to claim 3, wherein said holding means is set in said open state by means of said holding means. 5. The first holding member has a first holding wall and an upstream wall disposed upstream of the first holding wall when viewed in a transport direction of the cutting / holding mechanism. The first holding wall, the second holding wall, and the upstream wall cooperate with each other to define a receiving space whose upper side and the lower side are open downstream when viewed in the transport direction of the cutting and holding mechanism. 5. The synthetic resin supply means according to 4. 6. The synthetic resin supply device according to claim 5, wherein the cutting / holding mechanism is transported through a circular transport path. 7. The first holding wall is located radially outward and the second holding wall is located radially inside when viewed in the radial direction of the circular transfer path, and the second holding member is positioned in the circular transfer path. By moving in the radial direction of the path, the second holding member is selectively positioned at the holding position and the open position, and the holding means is selectively set to the holding state and the open state, When the second holding member is located at the open position, the center of the receiving space and the center of the extrusion opening of the extrusion nozzle are substantially aligned when viewed in the radial direction of the circular transport path. 7. The combination according to claim 6, wherein said cutting means has a cutting edge which extends radially outward above said receiving opening and inclines to the upstream side when viewed in the conveying direction of said cutting and holding mechanism. Resin supply device. 8. The synthetic resin supply device according to claim 1, wherein at least a surface of said holding means which contacts said synthetic resin to be cut is satin-finished.