JP3558331B2 - Injection molding equipment - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an injection molding apparatus for utilizing a part other than a product part such as a runner or a spool among molded articles molded by an injection molding machine as a recycled material.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, the above-mentioned recycled materials are widely used in a molding factory of a plastic molded product by an injection molding machine. Parts other than product parts such as runners and spools used as recycled materials may be cut and sorted manually by an operator, or may be automatically separated and sorted in a product discharge step of a molding operation.
[0003]
Conventionally, recycled materials such as runners and spools separated and sorted from product parts are generally crushed by a crusher or the like and mixed with virgin material, or only recycled materials are used, using a vacuum device or air conveyance device A method of using a hose or the like to charge the raw material into a hopper for charging an injection molding machine has been employed.
[0004]
[Problems to be solved by the invention]
However, the method of pulverizing with a pulverizer causes a decrease in working environment such as noise and dust, and also increases facility costs. There is also a method of directly charging the regenerated material such as runners and spools without pulverizing them into the raw material charging hopper.However, in particular, the runners and spools must be accurately supplied without causing bridges in the raw material charging hopper. Was difficult.
[0005]
The present invention has been made in view of the above-described circumstances, and as a recycled material without crushing parts other than product parts such as runners and spools, it is possible to directly and reliably and easily use an injection molding machine from a raw material charging hopper. It is an object of the present invention to provide an injection molding device capable of supplying a screw.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an injection molding apparatus according to the present invention includes an injection molding machine, and conveyance guide means extending from a position near an installation floor of the injection molding machine to a position above a material input hopper of the injection molding machine, A transfer unit movably mounted along the transfer guide means, and a transfer unit mounted on the transfer unit and moved from a position near the floor surface to a position above a raw material charging hopper and formed by the injection molding machine. A runner separated and separated from the molded product, a portion other than a product portion such as a spool is received at a position near the floor surface, and a bucket is supplied to the raw material charging hopper .
The transport guide means has a guide rail extending vertically in the vicinity of the floor surface and extending horizontally in a position above the raw material input hopper,
The transport unit is mounted so as to be able to travel while maintaining a predetermined posture with respect to the guide rail,
The bucket has a cylindrical bucket body that is open at the top and bottom, and this bucket body is fixed to the transport unit by being tilted by 30 ° to 60 °, and is also opened and closed at upper and lower openings, respectively. A lid provided with a biasing force in the direction is attached, and at a position near the floor surface of the guide rail, the upper lid is opened by contacting a part of the upper lid with movement of a bucket, A lid opening means for opening the lower lid by contacting a part of the lower lid with the movement of the bucket is provided at a position above the raw material charging hopper on the guide rail.
[0007]
This injection molding apparatus was placed at a position near the floor surface, using a part other than a product part such as a runner or a spool, which was separated manually or automatically from a molded product molded by an injection molding machine, as a recycled material. The bucket is moved to a position above the raw material charging hopper by the transport guide means and the transport unit, and a regenerated material such as a runner and a spool in the bucket is charged into the raw material charging hopper. The charging of the recycled material into the raw material charging hopper corresponds to the timing of discharging the molded product from the injection molding machine, or is performed once every several times, so that the recycled material is charged into the raw material charging hopper. It is accurately supplied to the screw of the injection molding machine without causing a bridge inside.
[0008]
The transport guide means has a guide rail extending vertically in a position near the floor surface and extending horizontally in a position above the raw material charging hopper, and the transport unit has a predetermined posture with respect to the guide rail. The bucket has a cylindrical bucket body that is open up and down, and the bucket body is fixed to the transport unit by being tilted by 30 ° to 60 °, and the upper and lower openings are provided. Lids that are openable and closable and are provided with a biasing force in the closing direction are attached to the respective portions, and a portion of the guide rail near the floor surface is brought into contact with a part of the upper lid as the bucket moves. The upper lid is opened by contacting the upper lid, and the lower lid is opened by contacting a part of the lower lid with the movement of the bucket at the position above the raw material charging hopper of the guide rail. It is preferable to provide a lid opening means for supplying the recycled material accurately by simply reciprocating the bucket along the guide rail by the simpler device and the transport unit. It can be put into the hopper.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 10 denotes an injection molding machine, which is installed on a floor surface 20. The injection molding machine 10 includes a frame 11 containing a control unit, a driving unit, and the like, an injection unit 12 and a mold clamping unit 13 provided on the frame 11, respectively, and is charged into a raw material charging hopper 12a of the injection unit 12. The resin material thus obtained is melted and kneaded by a screw 14, and is injected into a pair of dies 15 attached to the fixed die plate 13a and the movable die plate 13b of the mold clamping portion 13 to perform molding. The product portion 16 of the molded product and the portion 17 other than the product portion such as the runner and the spool are taken out by moving the movable die plate 13b to the left in FIG. Since the injection molding machine 10 is a known one, a detailed description thereof will be omitted.
[0010]
For example, guide rails 30 as transport guide means extending vertically are provided on a floor surface 20 on the opposite side (left side in FIG. 1) of the injection molding machine 10 on the opposite side (similarly in FIG. 1). Have been. The guide rail 30 is gently and horizontally bent at a position exceeding the height of the injection molding machine 10, reaches above the raw material charging hopper 12 a, and its tip is supported by a column 31.
[0011]
A transport unit 32 indicated by a dotted line in FIG. 2 is attached to the guide rail 30. The transport unit 32 has two rotatable guide rollers 33, 33 that respectively contact one guide surface 30a of the guide rail 30, and one drive roller 34 that is pressed against the other guide surface 30b. . The guide rollers 33, 33 are rotatably attached to the transport unit 32, and the drive roller 34 is rotated by a motor (not shown) and is movably attached in a direction toward the guide surface 30b as shown by an arrow C. And a biasing force toward the guide surface 30b is given by a spring (not shown) or the like.
[0012]
A bucket 35 is attached to the transport unit 32. The bucket 35 has a cylindrical bucket body 36 having an open top and bottom. When the transport unit 32 is located at a position where the guide rail 30 extends vertically as shown in FIG. As shown, it is fixed to the transport unit 32 so as to be inclined by 45 °. The angle of inclination of the bucket body 36 is not limited to 45 °, but may be in the range of 30 ° to 60 °.
[0013]
An upper lid 38 and a lower lid 39 are attached to the upper and lower openings of the bucket body 36 so as to be opened and closed by hinges 37, respectively. The lids 38 and 39 are provided with a biasing force in the closing direction by a torsion spring 40 fitted on the shaft of the hinge 37, and are configured to be normally closed. Bends 38a, 39a are provided at the ends of the lids 38, 39 on the far side in FIG. 2, and rollers 41, 42 are rotatably attached thereto.
[0014]
As shown in FIGS. 1 and 2, when the transport unit 32 and the bucket 35 move downward at a position near the floor 20 which is a rising portion of the guide rail 30, the guide unit 30 abuts on the roller 41, A dog 43 for opening the upper cover 38 against the torsion spring 40 is attached.
[0015]
Also, as shown in FIGS. 1 and 3, when the transport unit 32 and the bucket 35 move toward the tip of the guide rail 30 at a position above the raw material input hopper 12a, the guide rail 30 A dog 44 for contacting and opening the lower lid 39 against the torsion spring 40 is attached.
[0016]
Next, the operation of the present apparatus will be described. When the transport unit 32 travels along the guide rail 30 by the driving roller 34 and the transport unit 32 and the bucket 35 descend toward a position near the floor surface 20 which is a rising portion of the guide rail 30, the upper cover The roller 41 attached to 38 contacts the dog 43, and the upper lid 38 is opened as shown in FIG. When the upper cover 38 is opened, the transport unit 32 is stopped by a limit switch and a stopper (not shown).
[0017]
The molded article molded by the injection molding machine 10 and discharged from the mold 14 is separated manually or automatically by separating the part 17 other than the product part such as the runner and the spool from the product part 16 as a recycled material. Some are cut into appropriate sizes and thrown into the bucket 35 in which the upper lid 38 is open as described above.
[0018]
When the recycled material is put into the bucket 35, the drive roller 34 operates to move the transport unit 32 upward along the guide rail 30. The transport unit 32 maintains a predetermined posture with respect to the guide rail 30 by two guide rollers 33, 33 that are rotatably attached to the transport unit 32 and a drive roller 34 to which a pressing force is applied. Moving. That is, as shown in FIG. 1, the portion where the guide rail 30 extends in the vertical direction is directed upward, and the posture of the bucket 35 is maintained in the state shown in FIG.
[0019]
Since the hinge 37 rises relatively to the roller 41 attached to the lid 38 due to the rise of the bucket 35 accompanying the rise of the transport unit 32, the hinge 37 is centered on the hinge 37 by the urging force of the torsion spring 40. Turn to close. When the transport unit 32 further rises and reaches a portion that turns right in FIG. 1, the transport unit 32 tilts, and when the guide rail 30 becomes horizontal, the transport unit 32 assumes a horizontal posture as shown in FIG. Thus, the bucket 35 also takes a posture rotated 90 ° clockwise from the state of FIG.
[0020]
In this state, when the transport unit 32 further travels and reaches a position above the raw material charging hopper 12a, the roller 42 attached to the lower lid 39 comes into contact with the dog 44, and the transport unit 32 further moves downward. Cover 39 is opened against the torsion spring 40. When the lower lid 39 is opened, the regenerated material such as the runner and the spool, which have been charged in the bucket 35, is charged into the raw material charging hopper 12a. After this insertion, the transport unit 32 returns to the position shown in FIG. 2. However, when the transport unit 32 moves to the left from the position shown in FIG. 3, the lower lid 39 is closed by the urging force of the torsion spring 40.
[0021]
In the following, the above operation is performed in accordance with the timing of discharging the molded article from the mold 14, or is performed at a rate of about once every several discharges, and the regenerated materials such as runners and spools generated one after another are reduced The hoppers 12a are sequentially charged into a raw material charging hopper 12a. By sequentially feeding the regenerated materials such as runners and spools generated one after another to the raw material charging hopper 12a, the regenerated materials such as the runners and spools do not cause a bridge in the raw material charging hopper 12a. It is accurately supplied to the screw 14 of the injection molding machine.
[0022]
In the above-described embodiment, a guide rail 30 is provided as transport guide means extending vertically in the vicinity of the floor surface 20 and extending horizontally in the position above the raw material charging hopper 12a. A transport unit 32 running while maintaining a predetermined posture is attached, and a cylindrical bucket body 36 having an open top and bottom is fixed to the transport unit 32 at an angle of 45 ° or 30 ° to 60 °. Lids 38 and 39, which can be opened and closed by hinges 37 and applied with a biasing force in the closing direction by a torsion spring 40, are attached to the openings, and the positions near the floor surface 20 of the guide rail 30 and the raw material input hopper 12 a are A dog 43 and a dog 44 are provided at the upper position, and the upper cover 38 is moved by the movement of the bucket 35 at a position near the floor surface 20. The attached roller 41 is brought into contact with the dog 43 to open the upper lid 38 to feed the regenerated material. At the upper position of the raw material charging hopper 12a, the bucket 35 is similarly moved and attached to the lower lid 39. Although an example is shown in which the roller 42 is brought into contact with the dog 44 and the lower lid 39 is opened, the recycled material in the bucket 35 is charged into the raw material charging hopper 12a, but the present invention is not limited to this. Instead, for example, the bucket having only the upper part opened may be configured to be moved while always maintaining a fixed posture such as upward, and may be inverted at a position above the material input hopper 12a. The traveling of the transport unit 32 is not limited to the self-propelled type, but may be a system using a chain or a wire. It can be implemented in various modifications such as good.
[0023]
【The invention's effect】
As described above, according to the present invention, a part other than the product part such as a runner and a spool can be directly, reliably and easily supplied from a raw material charging hopper to a screw of an injection molding machine as a recycled material without crushing. The recycle material can be accurately charged into the raw material charging hopper by simply reciprocating the bucket along the guide rail by the transport unit with a simpler device.
[Brief description of the drawings]
FIG. 1 is a partially broken schematic front view showing an embodiment of an injection molding apparatus according to the present invention.
FIG. 2 is an enlarged detail view of a portion A in FIG. 1;
FIG. 3 is an enlarged detail view of a portion B in FIG. 1;
[Explanation of symbols]
Reference Signs List 10 Injection molding machine 12 Injection unit 12a Material input hopper 13 Mold clamping unit 14 Screw 15 Mold 16 Product part 17 Part other than product part (recycled material)
20 floor 30 guide rail (transport guide means)
32 transport unit 33 guide roller 34 drive roller 35 bucket 36 bucket body 37 hinge 38 upper lid 39 lower lid 40 torsion springs 41, 42 rollers 43, 44 dog (lid opening means)

Claims (1)

Injection molding machine, conveyance guide means extending from a position near the installation floor of the injection molding machine to a position above a material input hopper of the injection molding machine, and a conveyance unit movably mounted along the conveyance guide means And product parts such as runners and spools that are attached to the transport unit and moved from the position near the floor surface to a position above the raw material charging hopper and separated and sorted from the molded product molded by the injection molding machine. And a bucket for receiving the other portion at the position near the floor surface and charging the raw material charging hopper ,
The transport guide means has a guide rail extending vertically in the vicinity of the floor surface and extending horizontally in a position above the raw material input hopper,
The transport unit is mounted so as to be able to travel while maintaining a predetermined posture with respect to the guide rail,
The bucket has a cylindrical bucket body that is open at the top and bottom, and this bucket body is fixed to the transport unit by being tilted by 30 ° to 60 °, and is also opened and closed at upper and lower openings, respectively. A lid provided with a biasing force in the direction is attached, and at a position near the floor surface of the guide rail, the upper lid is opened by contacting a part of the upper lid with movement of a bucket, A lid opening means for opening the lower lid by contacting a part of the lower lid with movement of the bucket is provided at a position above the raw material charging hopper of the guide rail. An injection molding apparatus characterized by the above-mentioned.

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