JP2922133B2 - Screen changer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen changing device in a resin molding device.

[0002]

2. Description of the Related Art As this type of screen exchange device,
For example, there is a screen changing device in a plastic extruder as disclosed in Japanese Patent Publication No. 59-27698. As shown in FIG. 4, the screen exchange device disclosed in the publication has a slide plate 22 provided in a direction perpendicular to an extruder 21, and breaker plate 24 formed in each of breaker plate holes 23 formed on both sides thereof. And screen 25
Is mounted, the slide plate 22 is moved by a hydraulic cylinder, and the screens 25 provided on both sides are alternately used. In this case, the screen 25 is attached by using a snap ring 26 to prevent the screen 25 from dropping off.

[0003] In addition, the publication discloses a screen exchange device shown in FIG. 5 which is an improvement of the above-mentioned screen exchange device. That is, the branch flow paths 27 and 28 branching and joining the extruder 21 are formed, and in each of the branch flow paths 27 and 28,
A slide plate 22 is provided at right angles to the extruder 21, a breaker plate 24 and a screen 25 are mounted in a breaker plate hole 23 formed on one side thereof, and each slide plate 22 is moved by a hydraulic cylinder, and the screen 25 is moved.
Are exchanged one by one. In this case, the screen 25 is attached by using a screw-in type screen retainer 29 to prevent the screen 25 from falling off.

[0004]

In the above-described screen changing apparatus, the breaker plate 24 and the screen 25 are mounted in the hole 23 for the breaker plate of the slide plate 22, and the snap ring is used to prevent the screen 25 from dropping off. 26 or a screw-in type screen retainer 29 is used. However, when replacing the screen 25, in the case of the snap ring 26, there is a danger that the snap ring 26 will jump due to the spring force unless the attachment and detachment of the snap ring 26 is performed. Also screen 25
With a diameter of 70 mm or more, a great deal of force is required to shrink the snap ring 26 when installing and removing,
Special tools are required.

On the other hand, in the case of the screw-in type screen holder 29, since there is no operation of contracting as in the case of the snap ring 26, the attaching / detaching operation is relatively easy. When the screen is replaced, a force is required to rotate in the removal direction, and the removal may be difficult.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a screen changing apparatus capable of easily attaching and detaching a screen holder when replacing a screen.

[0007]

In order to achieve the above object, a screen exchange apparatus according to the present invention provides a slider in which a breaker plate, a screen, and a screen holder are mounted in this order in a hole for a breaker plate. In a screen exchange device in which the body is slidably provided,
When the slider is a round bar, and the screen retainer is formed in a ring shape, the hole depth for the breaker plate hole in the direction perpendicular to the axial center of the slider is determined by mounting the breaker plate, the screen, and the screen retainer. The edge of the screen retainer is formed to a depth substantially flush with the outer peripheral surface of the slider.

In the above-mentioned screen exchange device, the screen holder may have an arch-shaped handle, and the longitudinal direction of the handle may be mounted in the hole for the breaker plate in a direction parallel to the axial direction of the slider.

[0009]

In the above construction, the hole depth of the hole for the breaker plate in the direction perpendicular to the axis of the slider is adjusted such that the edge of the screen retainer is substantially flush with the outer peripheral surface of the slider when the breaker plate, the screen and the screen retainer are mounted. Since the breaker plate, screen, and screen holder are laminated and inserted into the round hole of the screen exchange device body, the edge of the screen holder in the direction perpendicular to the axis center is Abuts the inner peripheral surface of the round hole,
The screen can be prevented from falling off, and the screen retainer can be easily attached and detached when the screen is replaced because the screen retainer is simply mounted in a laminar shape.

Further, by forming an arc-shaped handle on the ring of the screen holder so as to pass through the center of the ring, it is possible to more easily attach and detach the screen holder when replacing the screen, and to use the handle. By mounting the resin in the hole for the breaker plate so that the longitudinal direction is parallel to the axial direction of the slider, when the resin flows, pressure is applied from the back of the handle, and the screen holder can be pressed against the screen more firmly. This is also expected to prevent the screen from being turned up and down when the slider is moved in and out to replace the screen.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of a screen exchange device according to the present invention, wherein a is a front view, b is an AA cross-sectional view of a, and c is an enlarged view of a main part of BB cross section of a. In the figure, reference numeral 1 denotes a main body of the screen exchange device, 2 denotes a slider, and 3 denotes a hydraulic cylinder.

The main body 1 of the screen exchange device has a circular hole 4 penetrating at the center thereof.
A resin flow path 5 of a molding resin is provided orthogonally to.
The hydraulic cylinder 3 is mounted on a hydraulic cylinder support plate 7 with a tie rod 6 interposed on one of the left and right end surfaces where the round hole 4 opens. Further, the slider 2 attached to the rod 8 of the hydraulic cylinder 3 is slidably provided in the round hole 4.

The slider 2 is a round bar, and in the illustrated embodiment, a round hole 9 for a breaker plate is formed through one side in the axial direction. This round hole 9 has a breaker plate receiver 10 and a disc-shaped breaker plate 11.
The screen 12 and the circular ring-shaped screen holder 13 are mounted in this order, and the hole depth of the round hole 9 in the direction perpendicular to the axial center of the slider 2 is determined by the breaker plate 1.
The edge 15 of the ring 14 of the screen retainer 13 is formed to a depth substantially flush with the outer peripheral surface of the slider 2 when the screen 12 and the screen retainer 13 are mounted. Therefore, the edge 15 of the screen holder 13 in a direction perpendicular to the axial center of the slider 2
Abuts against the inner peripheral surface of the round hole 4 of the main body 1 to prevent the screen 12 from falling off. Further, since the screen retainer 13 is simply mounted in the round hole 9 in a stacked manner, it is easy to remove and attach the screen retainer at the time of replacement.

The screen exchange device having the above-described structure is composed of a main body 1
Is used in a resin molding apparatus. In this case, the breaker plate 11, the screen 12, and the screen retainer 13 are mounted in this order on the round hole 9, and the hydraulic cylinder 3 is shortened to move the slider 2 in the round hole 4 of the main body 1, and the round hole 9 is made of resin. The resin that is communicated with the flow path 5 and is extruded in the resin flow path 5 by the resin molding device is filtered by the screen 12. If impurities and the like accumulate on the screen 12 by this filtration and become contaminated, the hydraulic cylinder 3 is extended and the slider
Is moved in the round hole 4 of the main body 1, the round hole 9 is taken out of the round hole 4, the screen holder 13 is removed, the screen 12 is replaced, and the screen holder 13 is attached again.

In the above embodiment, the shape of the hole 9 is a round hole, and the breaker plate 11 and the screen 12 are formed in a disc shape.
And the screen holder 13 was formed in a circular ring shape, but the present invention is not limited to this.
The outer shape of the breaker plate 11, the screen 12, and the screen holder 13 may be formed in the same shape as the hole 9 in an oval or elliptical shape.

Further, in the above embodiment, the screen holding
Although the example in which 13 is simply formed in a ring shape has been described, FIGS.
As shown in FIG. 7, an arc-shaped handle 16 passing through the center of the ring may be attached to the ring 14 of the screen holder 13.
With the configuration in which the arch-shaped handle 16 is attached in this manner, the screen holder 13 for replacing the screen 12 can be used.
Can be mounted and removed more easily. Also,
By mounting the handle 16 in the hole 9 for the breaker plate so that the longitudinal direction of the handle 16 is parallel to the axial direction of the slider 2, pressure is applied from the back of the handle 16 when resin flows, and the screen holder 13 is more firmly attached to the screen 12. Can be imposed. This can also be expected to prevent the screen 12 from being turned up when the slider 2 is moved to replace the screen 12.

In the above embodiment, the hole 9 is formed in the slider 2
Although an example in which the screen 12 is provided on only one side has been described, the screen 12 may be provided on both sides in a conventional manner to alternately replace the screen 12, or as disclosed in JP-B-59-27698, The resin flow path 5 may be branched and merged, and the screen exchange device having the above configuration may be provided in each of the branched flow paths.

[0018]

As described above, with the screen changing device according to the present invention, the screen holder can be easily attached and detached when the screen is changed, the workability of the screen changing is improved, and the screen of the resin molding device is improved. Various effects such as improvement in productivity are expected.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a screen exchange device according to the present invention, wherein a is a front view, b is a cross-sectional view taken along the line AA of c, and c is B of a.
It is a principal part enlarged view of -B cross section.

FIG. 2 is an explanatory view of a screen holder according to the present invention, wherein a is a top view and b is a front view.

3A and 3B are explanatory views of a screen holder according to another embodiment of the present invention, wherein a is a top view and b is a front view.

FIG. 4 is an explanatory diagram of a conventional screen exchange device.

FIG. 5 is an explanatory view of another conventional screen exchange device.

[Explanation of symbols]

1: Body 2: Slider
3: Hydraulic cylinder 4: Round hole 5: Resin flow path
6: Tie rod 7: Hydraulic cylinder support plate 8: Rod
9: Round hole 10: Breaker plate receiver 1
1: Breaker plate 12: Screen 13: Screen holder 1
4: Wheel 15: Edge 16: Arched handle

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yamazaki Nobuhiro 2-3-1, Shinhama, Araimachi, Takasago City, Hyogo Prefecture Kobe Steel, Ltd. Inside Takasago Works (72) Inventor Yoshiaki Nakata Araimachi, Takasago City, Hyogo Prefecture 2-3-1 Niihama Kobe Steel, Ltd. Takasago Works (72) Inventor Osamu Ikeda 2-3-1 Shinhama, Arai-machi, Takasago City, Hyogo Prefecture Kobe Steel, Ltd. Takasago Works (56) References JP Akira 54-74863 (JP, A) JP-A-58-51129 (JP, A) JP-A-64-7724 (JP, A) JP-A-5-4270 (JP, A) JP-A-8-252859 (JP, A A) JP-A-7-186242 (JP, A) JP-A-55-123439 (JP, A) JP-A-55-13043 (JP, U) JP-A-56-8423 (JP, U) JP-A-58 -153008 (JP, U) JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B29C 47/00-47/96

Claims (2)

(57) [Claims] 1. A screen exchange device comprising a main body and a slider slidably provided with a breaker plate, a screen, and a screen retainer in this order in a hole for the breaker plate. The screen retainer is formed in a ring shape, and the hole depth of the hole for the breaker plate in the direction perpendicular to the axis of the slider is adjusted so that the edge of the screen retainer when the breaker plate, the screen, and the screen retainer are mounted. A screen exchange device formed at a depth substantially flush with an outer peripheral surface. 2. The screen changing device according to claim 1, wherein the screen retainer has an arc-shaped handle, and a longitudinal direction of the handle is attached to a hole for a breaker plate in a direction parallel to an axial direction of the slider.