JP5236446B2 - Finishing equipment for plastic molded products - Google Patents

Description

The present invention relates to a finishing apparatus for a plastic molded product that removes burrs generated in a parting line or the like when finishing the surface of a plastic molded product.

Generally, on the surface of a plastic molded product manufactured by a molding method such as injection molding, fine line-like thread burrs are likely to occur in the parting line corresponding to the joint of the mold. Or there was a functional problem. Therefore, conventionally, surface finishing of the molded product has been performed by cutting and removing thread burrs generated in such a parting line with a knife or a file.

When such work is performed manually, there is a problem that not only the finishing accuracy is varied but also the yield of the product is greatly reduced. For this purpose, an apparatus for automatically cutting and removing yarn burrs generated on the parting line by rotating the cutting jig (see References 1 and 2) has been invented.
Japanese Patent Laid-Open No. 5-000419 JP-A-5-127162

When removing burrs, there is a problem that it takes time in the conventional manual work, and even if the manual work and the above-described apparatus are used, the burrs generated in the parting line are removed by cutting. Since the cutting waste is generated after removing the burr, there is a problem that the processing is necessary.

Then, an object of this invention is to provide the finishing apparatus of the plastic molded product which removes the burr | flash produced in the parting line etc. of a molded product automatically, and does not produce the cutting waste after removal.

A finishing apparatus for a plastic molded product according to the present invention includes a jig for holding a molded product and a heating tool that presses against a burr generated on the molded product, and the heating tool contacts the burr generated on the molded product. A synthetic rubber provided on the surface and a heater for heating the synthetic rubber to a predetermined temperature. After the synthetic rubber is heated to a predetermined temperature by the heater, the synthetic rubber is formed on the burr generated in the molded product. The rubber is pressed, the burrs are melted, and the melted burrs are welded to the surface of the molded product to be flat.

Furthermore, it is also possible to rotate the molded product with the jig and move the surface of the molded product in which the burrs are generated in a direction in contact with the synthetic rubber.

A film supply device for supplying a film between the synthetic rubber and the molded product is provided, and when the synthetic rubber is pressed against the molded product, the synthetic rubber is applied to the burrs generated on the molded product from above the film. It can also be pressed.

It is also possible to provide a molded article conveying means for setting the molded article on the jig.

A finishing apparatus for a plastic molded product according to the present invention includes a jig for holding a molded product and a heating tool that presses against a burr generated on the molded product, and the heating tool contacts the burr generated on the molded product. A synthetic rubber provided on the surface and a heater for heating the synthetic rubber to a predetermined temperature. After the synthetic rubber is heated to a predetermined temperature by the heater, the synthetic rubber is formed on the burr generated in the molded product. By pressing the rubber, melting the burr, and welding and flattening the melted burr on the surface of the molded product, it is automatically generated in the parting line of the molded product without generating cutting waste. It is possible to remove the burrs and finish the molded product.

Further, by rotating the molded product with the jig and moving the burr-formed surface of the molded product in a direction in contact with the synthetic rubber, the manual operation for changing the orientation of the molded product can be omitted. it can.

A film supply device for supplying a film between the synthetic rubber and the molded product is provided, and when the synthetic rubber is pressed against the molded product, the synthetic rubber is applied to the burrs generated on the molded product from above the film. By pressing, it becomes possible to obtain gloss and dullness on the surface of the molded product after removal of burrs generated in the parting line and the like, and it is possible to appropriately respond to the finish required for the molded product.

By providing a molded product conveying means for setting the molded product in the jig, everything from the production of the molded product to the removal of burrs generated in the parting line and the like can be performed automatically.

The apparatus for finishing a plastic molded product of the present invention will be described below in detail with reference to the drawings. In a plastic molded product, burrs are generated on a parting line at a portion corresponding to a joint between molds during molding. The plastic molded product finishing apparatus of the present invention does not scrape off the burrs generated in the parting line or the like as in the prior art, but heats to melt the burrs and melts the burrs. It is an apparatus that performs finishing by welding and flattening the surface of a molded product.

1 is a schematic front view of a plastic molded product finishing device 1 according to the first embodiment (the molded product conveying means 20 is omitted), FIG. 2 is a side view of the plastic molded product finishing device 1, and FIG. FIG. 2 is a schematic front view of the molded article conveying means 20 omitted in FIG. 1 as viewed from the side opposite to FIG. 1. Accordingly, FIG. 1 and FIG. 3 are in a positional relationship facing each other, and when the components described in FIGS. 1 and 3 are combined, the entire plastic molded product finishing device 1 of the present invention is obtained.

The finishing device 1 for a plastic molded product according to the first embodiment is a device for removing a burr 19 generated on a parting line of the molded product 18, and includes a jig 2 for holding the molded product 18 and the above-described device. A heating tool 3 for melting the burrs 19 generated in the molded product 18 by heat is provided, and further, a molded product transporting means 20 for moving the molded product 18 to the jig 2 is provided.

The jig 2 and the heating tool 3 are arranged on a lower stage 4, and the jig 2 is provided on a moving stage 5 having a moving mechanism that moves along a rail 17 provided on the lower stage 4. The holding table 10 that holds the molded product 18, the two columns 6 arranged on the left and right of the holding table 10, the shaft 7 that is rotatably supported by the column 6, and is fixed perpendicular to the shaft 7. The two arms 8 and the drive unit 9 constituted by a motor, a belt and the like for rotating the shaft 7 are configured.

The jig 2 is movable (movable in the direction indicated by the arrow in FIG. 2) between the lower part of the heating tool 3 and the lower part of the molded article conveying means 20 by the moving stage 5. The arm 8 is movable between a horizontal direction and a downward vertical direction as the shaft 7 is rotated by the drive unit 9.

A protrusion 16 is provided on the front side of the upper portion of the holding base 10, and a protrusion 11 is provided on the opposing surfaces of the two arms 8 in the vicinity of the tip of the arm 8. When the molded product 18 is first set on the jig 2, the molded product 18 is held by the holding base 10 and the projection 11 of the arm 8 in a state where the arm 8 is in a horizontal direction. Thereafter, the arm 8 moves in the vertical direction, and the molded product 18 is held by the holding table 10 by the protrusion 16.

The heating tool 3 includes a plate-like synthetic rubber 13 provided on the surface of the molded product 18 that contacts the burr 19 and a heater 12 that heats the synthetic rubber 13 to a predetermined temperature. Silicon rubber, fluorine rubber, or the like is used as the synthetic rubber 13, but any other synthetic rubber that can withstand the heating temperature of the heater 12 may be used. The heating tool 3 is moved up and down by a cylinder 14, the cylinder 14 is fixed to a cylinder support 15, and the cylinder support 15 is held by a column 34.

The molded product transporting means 20 transports the molded product 18 immediately after molding and moves it to the jig 2, and further transports the finished molded product 18 to the next process, as with other members. Is provided on the lower stage 4 and is installed at a position that is the front of the jig 2 and the like.

The molded article conveying means 20 includes a supply belt conveyor 21 that carries the molded article 18 after molding, a discharge belt conveyor 22 for conveying the finished molded article 18 to the next process, and the molded article 18 as described above. It comprises moving means that moves from the supply belt conveyor 21 to the jig 2 and further moves from the jig 2 to the discharge belt conveyor 22.

The moving means moves the molded product 18 by a horizontal slide member 26 that is attached to the support column 27 and slides in the horizontal direction and a vertical slide member 25 that slides in the vertical direction, and holds the molded product 18. Are provided on an arm 23 provided at the lower end of the vertical slide member 25.

A method for removing the burrs 19 generated in the molded product 18 will be described. The molded product 18 is set on the holding table 10 below the heating tool 3 so that the burrs 19 generated in the molded product 18 face upward. The heater 12 heats the synthetic rubber 13 to near the plastic deformation temperature of the resin of the molded product 18. And the said cylinder 14 is operated, the said heating tool 3 is moved below, and the said synthetic rubber 13 is pressed on the burr | flash 19 produced in the said molded article 18 from the top.

When the heated synthetic rubber 13 is pressed, the burr 19 begins to melt, and the burr 19 is melted because the synthetic rubber 13 is pressed against the molded product 18. By welding to the surface, the surface of the molded product 18 becomes flat.

The operation of the plastic molded product finishing device 1 will be described in detail with reference to the drawings. First, the molded product 18 after being molded is conveyed by the supply belt conveyor 21. At this time, the molded product 18 is carried in a state where the surface on which the burrs 19 are generated is the jig 2 side (front side in FIG. 3). Then, when the molded product 18 arrives at a predetermined position, the suction portion 24 is moved onto the molded product 18 by the horizontal slide member 26 and the vertical slide member 25, and the molded product as shown in FIG. 18 is adsorbed and held.

At this time, the jig 2 is moved between the supply belt conveyor 21 and the discharge belt conveyor 22 by the moving stage 5, and the arm 8 is in a horizontal state.

With the molded product 18 held, the horizontal slide member 26 and the vertical slide member 25 are operated to move the molded product 18, and as shown in FIG. 4B, the holding table 10 and the arm 8 are moved. Is placed on the protrusion 11. Thereafter, the suction by the suction portion 24 is released, the vertical slide member 25 and the horizontal slide member 26 are operated, and the suction portion 24 is separated from the molded product 18.

Thus, when the molded product 18 is placed on the jig 2, the jig 2 is moved below the heating tool 3 by the moving stage 5. At this time, since the surface of the molded product 18 where the burr 19 is generated is sideways, the shaft 7 is rotated by the operation of the drive unit 9 so that the arm 8 is moved vertically. move. As a result, the direction of the molded product 18 is changed, and as shown in FIG. 4A, the holding table 10 is caught by the protrusion 16 with the surface on which the burr 19 is formed facing upward. Retained.

In this way, while the molded product 18 is set in the jig 2 in a predetermined direction, the heater 12 is operated to heat the synthetic rubber 13 to near the plastic deformation temperature of the resin of the molded product 18. deep. Then, when the setting of the molded product 18 is completed, the cylinder 14 is operated to move the heating tool 3 downward as shown in FIG. 5, so that the synthetic rubber 13 is generated on the molded product 18. Press against 19.

When the synthetic rubber 13 is pressed, the burrs 19 are heated and start to melt. The melted burr 19 is in a state in which the synthetic rubber 13 is pressed against the surface of the molded product 18, so that it is welded to the surface of the molded product 18 and the surface of the molded product 18 becomes flat, and the molded product 18 becomes flat. Finishing the product 18 is completed.

When all the burrs 19 are welded to the surface of the molded product 18, the cylinder 14 is operated to move the heating tool 3 upward, and the heating by the heater 12 is stopped. Then, the shaft 7 is rotated by the operation of the drive unit 9 to move the arm 8 in the horizontal direction, and when the molded product 18 returns to the original direction, the operation of the moving stage 5 causes the movement shown in FIG. As described above, the jig 2 is moved between the supply belt conveyor 21 and the discharge belt conveyor 22.

In this way, while the burr 19 of the molded product 18 is being removed, the next molded product 18 ′ is carried to a predetermined position by the supply belt conveyor 21. Then, when the molded product 18 from which the burrs 19 are removed and the molded product 18 ′ from which the burrs 19 are removed are arranged at predetermined positions, the two suction portions are operated by the operation of the horizontal slide member 26 and the vertical slide member 25. 24 are respectively moved above the molded product 18 and the molded product 18 ′, and as shown in FIG. 7, the molded product 18 and the molded product 18 ′ are simultaneously adsorbed and held.

Then, by the operation of the horizontal slide member 26 and the vertical slide member 25, as shown in FIG. 8, the molded product 18 is moved onto the discharge belt conveyor 21, and the molded product 18 ′ is moved to the jig 2. And move. Then, the suction by the suction portion 24 is released, the molded product 18 is carried to the next process by the discharge belt conveyor 22, and the molded product 18 ′ is moved below the heating tool 3 by the operation of the moving stage 5. Then, the burr 19 is removed.

In this way, by providing the two suction portions 24 and adjusting the distance between them, the two molded products 18 and 18 ′ can be moved simultaneously by the operation of the horizontal slide member 26 and the vertical slide member 25 once. Therefore, the operation time can be shortened.

Thus, the plastic molded product finishing apparatus of the present invention melts and removes the burrs with heat, and automatically removes the burrs generated in the parting line of the molded product without forming cutting waste. It is possible to finish the product.

Next, a plastic molded product finishing apparatus 1 'according to a second embodiment will be described with reference to the drawings. As shown in FIG. 9, the plastic molded product finishing device 1 ′ of the second embodiment is obtained by adding a film supply device 28 to the plastic molded product finishing device 1 of the first embodiment. Since the structure is the same as that of the first embodiment, the film supply device 28 will be mainly described here.

As shown in FIG. 9, the film supply device 28 supplies a film 35 between the molded product 18 and the synthetic rubber 13 of the heating tool 3 when removing the burrs 19 of the molded product 18. A film supply reel 29 and a film take-up reel 30, a plurality of guides are provided between the supply reel 29 and the take-up reel 30, and the film is provided between the heating tool 3 and the molded product 18. 35 is passed.

As shown in FIG. 10, the plastic molded product finishing apparatus 1 ′ finishes the molded product 18 by melting the burr 19 while pressing the film 35 against the molded product 18 by the heating tool 3. This makes it possible to change the surface condition of the molded article 18 after finishing.

For example, when a PET film is used as the film 35, if the molded product 18 is an AS / ABS resin molded product, gloss is generated on the finished surface of the molded product 18. Further, when a PE film is used as the film 35, if the molded product 18 is a PET resin molded product, dullness is generated on the finished surface of the molded product 18. Although these are examples, the state of the surface after finishing the molded product 18 can be changed by a combination of the material of the film 35 and the material of the molded product 18. Thereby, it is also possible to select a preferable finishing state of each molded product 18.

Up to this point, an apparatus for removing burrs generated on the parting line on the side surface of the molded product 18 having a thin shape such as a compact lid has been described. Next, as a third embodiment, a cream is described. A plastic molded product finishing apparatus 1 '' for removing burrs 32 generated on the upper part of a molded product 31 having a thick shape such as a wide-mouthed container and its cap will be described.

As shown in FIG. 11, the plastic molded product finishing apparatus 1 ″ according to the present embodiment has a jig 33 for holding the molded product 31 and heating for melting the burrs 32 generated in the molded product 31 with heat. The tool 3 is further provided, and further, a molded article transporting means 20 for moving the molded article 31 to the jig 33 is provided.

The jig 33 can be moved below the heating tool 3 and below the molded article transporting means 20 by the moving stage 5. However, unlike the previous embodiments, the molded article 31 is simply used. It is a stand for mounting.

The heating tool 3 includes a plate-like synthetic rubber 13 provided on a surface that contacts the burr 32 generated on the upper surface of the molded product 31, and a heater 12 that heats the synthetic rubber 13 to a predetermined temperature. The heating tool 3 is moved up and down by a cylinder 14, the cylinder 14 is fixed to a cylinder support 15, and the cylinder support 15 is held by a column 34.

The molded product transporting means 20 transports the molded product 31 and moves it to the jig 33, and further transports the finished molded product 31 to the next process. Like the other members, the lower stage 4 is provided at a position on the front surface of the jig 33 and the like. The molded article conveying means 20 includes a supply belt conveyor 21 that carries a molded article 31 after molding, a discharge belt conveyor 22 for conveying the finished molded article 31 to the next process, and the molded article 31 as described above. It consists of moving means that moves from the supply belt conveyor 21 to the jig 33, and further moves from the jig 33 to the discharge belt conveyor 22, and uses the same means as in the other embodiments described above. Detailed description will be omitted.

A molded product 31 such as a wide-mouth container that is a target of the plastic molded product finishing apparatus 1 '' of the present embodiment is normally adsorbed by the take-out machine when the outside (bottom) of the molded product 31 is taken out from the mold. Then, it is placed on the supply belt conveyor 21 of the molded article transport means 20. At this time, since the placed molded product 31 has an opening where the burr 32 is formed downward, it is necessary to invert the molded product 31 in order to remove the burr 32.

Therefore, a reversing device for reversing the molded product 31 is provided in the plastic molded product finishing device 1 ″ of the present embodiment. The place where the reversing device is installed is not particularly limited. For example, the reversing device may be provided at an end portion, an initial end portion or an end end portion of the supply belt conveyor 21, or in the middle. It is also possible to place the molded product 31 once on 33 and then reverse it.

Further, the operation of the plastic molded product finishing apparatus 1 ″ will be described in detail with reference to the drawings. First, the molded product 31 after molding is conveyed by the supply belt conveyor 21. At this time, the molded product 31 has already been reversed by the reversing device (not shown), and the surface on which the burr 32 is generated faces upward. When the molded product 31 arrives at a predetermined position, the suction portion 24 is moved onto the molded product 31 by the horizontal slide member 26 and the vertical slide member 25, and as shown in FIG. Adsorb and hold the bottom of 31.

At this time, the jig 33 is moved between the supply belt conveyor 21 and the discharge belt conveyor 22 by the moving stage 5. In a state where the molded product 31 is held, the horizontal slide member 26 and the vertical slide member 25 are operated to place the molded product 31 on the jig 33. Thereafter, the suction by the suction portion 24 is released, the vertical slide member 25 and the horizontal slide member 26 are operated, and the suction portion 24 is separated from the molded product 31. When the molded product 31 is placed on the jig 33 in this way, the jig 33 is moved below the heating tool 3 by the moving stage 5 as shown in FIG.

As described above, while the molded product 31 is set on the jig 33, the heater 12 is operated to heat the synthetic rubber 13 to near the plastic deformation temperature of the resin of the molded product 31. When the setting of the molded product 31 is completed, the cylinder 14 is operated to move the heating tool 3 downward as shown in FIG. 13 so that the synthetic rubber 13 is generated on the molded product 31. Press to 32.

When the synthetic rubber 13 is pressed, the burrs 32 are heated and start to melt. The melted burr 32 is in a state where the synthetic rubber 13 is pressed against the molded product 32, so that it is welded to the molded product 31 and finishing of the molded product 31 is completed.

When all the burrs 32 are welded to the molded product 31, the cylinder 14 is operated to move the heating tool 3 upward, and heating by the heater 14 is stopped. Then, the jig 2 is moved between the supply belt conveyor 21 and the discharge belt conveyor 22 by the operation of the moving stage 5.

Thus, while the burr 32 of the molded product 31 is being removed, the next molded product 31 ′ is arranged at a predetermined position by the supply belt conveyor 21, so that the horizontal slide member 26 and the vertical slide member are arranged. 25, the two adsorbing portions 24 are respectively moved above the molded product 31 and the molded product 31 ′, and as shown in FIG. 14, the molded product 31 and the molded product 31 ′ are simultaneously sucked and held. Then, by the operation of the horizontal slide member 26 and the vertical slide member 25, the molded product 31 is moved onto the discharge belt conveyor 21, and the molded product 31 ′ is moved to the jig 33.

Then, the suction by the suction part 24 is released, the molded product 31 is carried to the next process by the discharge belt conveyor 22, and the molded product 31 ′ is moved below the heating tool 3 by the operation of the moving stage 5. The burr 32 is subsequently removed.

As described above, the plastic molded product finishing apparatus of the present invention melts and removes burrs with heat, and automatically removes burrs generated in the molded products without producing cutting waste and finishes the molded products. It becomes possible.

It is the schematic front view of the finishing apparatus of the plastic molded product of 1st Embodiment, and is the figure which abbreviate | omitted the molded product conveyance means. It is a schematic side view of the finishing apparatus of the plastic molded product of 1st Embodiment. It is the schematic front view which looked at the molded article conveyance means abbreviate | omitted in FIG. 1 from the opposite side to FIG. It is a side view of the arm and holding stand of a jig | tool, (a) shows the state which made the arm vertical, (b) shows the state which made the arm horizontal. It is a schematic side view of the finishing apparatus of the plastic molded product of 1st Embodiment of the state which has removed the burr | flash. It is a schematic side view of the finishing apparatus of the plastic molded product of 1st Embodiment of the state which moved the molded product to the molded article conveyance means after burr | flash removal. It is a figure which shows the state which adsorb | sucked the molded article after a burr | flash removal, and the molded article which removes a burr | flash next by an adsorption | suction part. It is a figure which shows the state which adsorb | sucked and moved the molded article after a burr | flash removal, and the molded article which removes a burr | flash next by an adsorption | suction part. It is the schematic front view of the finishing apparatus of the plastic molded product of 2nd Embodiment, and is the figure which abbreviate | omitted the molded product conveyance means. It is a schematic side front view of the finishing apparatus of the plastic molded product of 2nd Embodiment of the state which has removed the burr | flash. It is a schematic side view of the finishing apparatus of the plastic molded product of 3rd Embodiment. It is a figure which shows the state which adsorb | sucked the molded article which removes a burr | flash with an adsorption | suction part. It is a schematic side front view of the finishing apparatus of the plastic molded product of 3rd Embodiment of the state which has removed the burr | flash. It is a figure which shows the state which adsorb | sucked the molded article after a burr | flash removal, and the molded article which removes a burr | flash next by an adsorption | suction part.

Explanation of symbols

1,1 ′, 1 ″ Plastic Molding Finishing Device 2 Jig 3 Heating Tool 4 Lower Stage 5 Moving Stage 6 Strut 7 Axis 8 Arm 9 Drive Unit 10 Holding Base 11 Protrusion 12 Heater 13 Synthetic Rubber 14 Cylinder 15 Cylinder Support 16 Protrusion 17 Rail 18, 18 'Molded product 19 Burr 20 Molded product conveying means 21 Supply belt conveyor 22 Discharge belt conveyor 23 Arm 24 Adsorption unit 25 Vertical slide member 26 Horizontal slide member 27 Support column 28 Film supply device 29 Film supply reel 30 Film take-up reel 31, 31 'Molded product 32 Burr 33 Jig 34 Post 35 Film

Claims (4)

A jig for holding the molded product, and a heating tool that presses against the burr generated in the molded product,
The heating tool is composed of a synthetic rubber provided on a surface in contact with a burr generated in the molded product, and a heater for heating the synthetic rubber to a predetermined temperature.
After the synthetic rubber is heated to a predetermined temperature with the heater, the synthetic rubber is pressed against the burr generated in the molded product, the burr is melted, and the melted burr is welded to the surface of the molded product. Finishing device for plastic molded products characterized by flattening. 2. The apparatus for finishing a plastic molded product according to claim 1, wherein the molded product is rotated by the jig to move a surface of the molded product where a burr is generated in a direction in contact with the synthetic rubber. 3. A film supply device for supplying a film between the synthetic rubber and the molded product is provided, and when the synthetic rubber is pressed against the molded product, the synthetic rubber is applied to the burrs generated on the molded product from above the film. The apparatus for finishing a plastic molded product according to claim 1 or 2, wherein pressing is performed. The finishing device for a plastic molded product according to any one of claims 1 to 3, further comprising a molded product conveying means for setting the molded product on the jig.

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