JPH0710845Y2 - Deburring device for mold core - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deburring device for mechanically removing burrs protruding from the peripheral surface of a sand mold core.

[0002]

2. Description of the Related Art Sand mold mold cores are
For example, a mold sand mixed with a binder such as a thermosetting resin is filled and cured in a split mold to be molded, but a portion protruding at the boundary of the split mold remains as a so-called burr. This burr must be completely removed,
The mold core is very hard because it is only the mold sand hardened into the required shape, and deburring must be performed with great care so as not to destroy the core.

Conventionally, as this kind of deburring device, there has been proposed a device for rotating a chain and removing the deburring by its ballooning action, as proposed in Japanese Utility Model Publication No. 50-21296, for example. Then, if the chain cord is rotated at such a high speed that a ballooning action (phenomenon) is applied and this is applied to the core, not only the burr but also the core itself may be destroyed. Since it is only the surface, it is difficult to bring the chain cord into contact with the burr protruding peripheral surface of the core having a complicated uneven shape, and there is nothing suitable for practical use. Therefore, since the burr has still been scraped off by hand using a bamboo spatula, a great deal of labor and time are required to remove the burr, and the core manufacturing cost cannot be reduced.

[0004]

The present invention proposes a deburring device for a mold core, which can solve the above-mentioned conventional problems, and is characterized in that the burr 17a has a peripheral surface 1
7b corresponding to the contour of the peripheral surface of the burr protruding of the core 17 on the jigs 2 and 3, the lower base 4 having the jigs 2 and 3 for supporting the mold core 17 in a posture of protruding substantially horizontally. A plurality of deburring chains 8 and 9 at a position, an elevating drive means 13 for repeatedly elevating and lowering the upper pedestal 7 in a perspective direction with respect to the lower pedestal 4, and the elevating drive means for the upper pedestal 7. Upper base 7 while repeatedly moving up and down by 13
Is provided with a vibrating means 14 for horizontally vibrating.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the accompanying drawings.

1 to 3, reference numeral 1 denotes a lower base on which core supporting jigs 2 and 3 are arranged side by side, and a pair of left and right guide rods 5 are provided on a lower base 4. And lower limit position A
Is supported so as to be able to ascend and descend between the upper limit position B and the ascending limit position B, and is vertically moved by a cylinder unit 6 as an ascending / descending drive means. Reference numeral 7 denotes an upper base on which deburring chains 8 and 9 are hung from the lower surface, and a pair of left and right elevating guide rods 12 is provided below the upper base 11 supported on the base 4 via columns 10. It is supported so as to be able to ascend / descend between the ascending limit position C and the descending limit position D via the, and is vertically moved by a cylinder unit 13 as an ascending / descending drive means.

A vibration means 14 using an air cylinder for horizontally vibrating the upper table 7 is connected to the upper table 7. In order to vibrate the upper base 7 by the vibrating means 14 without any hindrance, a cushioning elastic body 15 is interposed between the piston rod 13a of the cylinder unit 13 and the upper base 7, and the upper base 11 is further provided. Allow the hole through which the elevating guide rod 12 on the side penetrates,
The lift guide rod 12 is configured to be able to vibrate integrally with the upper table 7. Of course, a cushioning elastic body may be interposed between the elevating guide rod 12 and the upper base 7. Reference numeral 16 denotes a coil spring supported on the upper surfaces of the four corners of the upper base 7 via pins 16a so that the upper base 7 is slightly compressed between the upper base 11 and the upper base 11 when the upper base 7 is at the upper limit position C. Is configured.

As shown in FIGS. 3 and 5, the jigs 2 and 3 are so constructed as to be capable of supporting the mold cores 17 in such a posture that the burrs 17a project from the peripheral surface 17b in a substantially horizontal direction. Various jigs are used according to the shape of the core 17, but the jigs 2 and 3 in the illustrated example have shaft portions 2a and 3a which fit into holes formed in the core 17. And plate portions 2b and 3b adjacent to one side surface of the core 17.
As shown in FIG. 6, the deburring chains 8 and 9 are attached to the wire rods 19 of appropriate hardness which are inserted into the eyebolts 18 attached to the lower side of the upper table 7 at appropriate intervals. As shown in FIGS. 2 and 4, the upper end rings 8a and 9a of the chains 8 and 9 are inserted in close contact with each other, so that the burr protruding peripheral surface 17 of the core 17 on the jigs 2 and 3 is inserted.
From the line corresponding to the contour of b, it is hung from the upper stand 7 in the shape of a ball. The length of the chains 8 and 9 is such that the lower ends of the chains 8 and 9 reach below the upper limit position B of the lower platform 1 when the upper platform 7 is at the upper limit position C as shown in FIG. I am sorry.

To explain the method of use, the manufactured core 1
7, the burr 17a is supported in a predetermined posture in which the burr 17a projects horizontally from the peripheral surface 17b by the jigs 2 and 3 on the lower base 1 using the shaft portions 2a and 3a and the plate portions 2b and 3b. Then, while vibrating the vibrating means 14 to vibrate the upper table 7 in the horizontal direction, the upper table 7 is lowered by the cylinder unit 13 from the upper limit position C to the lower limit position D at the same time. The lower platform 1 is raised from the lower limit position A toward the upper limit position B. As a result, the chains 8 and 9 descending integrally with the upper table 7 descend along the rising burr projecting peripheral surface 17b of the core 17 on the lower table 1 which is rising. Since 9 is vibrating in the horizontal direction due to the vibration of the upper base 7, the sliding contact motion is performed so as to positively strike the burr projecting peripheral surface 17b of the core 17 from the lateral direction.

Therefore, after the lower table 1 reaches the ascent limit position B, only the upper table 7 remains at the descending limit position D and the ascending limit position C while the lower table 1 remains stopped at the ascending limit position B. By repeatedly moving up and down a plurality of times between the cores, the burr protruding peripheral surface 17 of each core 17 supported on the lower base 1
The burr 17a protruding from the b is reliably removed by the burr scraping or knocking-down action of each of the chains 8 and 9 which comes into contact with the burr 17a and performs a vertical movement and a horizontal vibration motion. Deburring core 17
Lowers the lower base 1 back to the lower limit position A,
The upper base 7 is returned to the ascending end position C and returned to the jigs 2, 3
Can be removed from.

The vibration direction of the upper table 7 should be set so that the burr 17 can be most efficiently removed according to the shape of the peripheral surface of the core 17 protruding on the lower table 1. I have to. In order to remove the burr 17a most efficiently, the chains 8 and 9 have wire diameters, ring sizes,
Although it is configured by selecting the material of the wire rod and the like, as shown in FIGS. 4 and 5, there is a slit-like portion 17c in which the chains 8 and 9 cannot enter in the burr protruding peripheral surface 17b of the core 17. In this case, as shown in FIGS. 1 and 2, for example, as shown in FIGS. 1 and 2, the knife-shaped strip 20 that enters the slit-shaped portion 17c as the lower base 1 moves upward is supported by the intermediate base 21. The upper end can also be supported and hung down. Further, when the burr projecting peripheral surface 17b of the core 17 has a completely linear plane, as shown in FIG. As shown in FIGS. 1 and 2, it is also possible to suspend the knife-shaped strip 22 that is in sliding contact with the upper end of the intermediate base 21 by supporting it. In other words, not only the chains 8 and 9, but also the fixed knife-shaped strips 20 and 22 for scraping off the burr 17a as described above can be used together. Further, a group of chains acting on one core 17 are not all composed of the same chain, but the wire diameter, the size of the ring, or the size of the ring so that all the burrs 17a can be removed most efficiently. It is also possible to combine a plurality of types of chains with different wire materials.

In the above embodiment, the two cores 17 are configured to be processed at the same time.
The number of is not limited. The deburring chain used in the present invention is not limited to a general chain in which rings are connected, but various chains such as spheres connected by wire rods or a flexible cable. In addition, various chain-shaped objects having appropriate weights having flexibility and having irregularities on the peripheral surface, such as those in which spheres and the like are attached at equal intervals are included. Further, in the embodiment, both the lower base 1 and the upper base 7 are configured to be raised and lowered, but it is also possible to configure only one of them to be raised and lowered.

[0013]

As described above, according to the deburring device for a mold core of the present invention, the upper stand is set on the lower stand while the core is set on the jig of the lower stand in a predetermined posture. By repeatedly driving up and down, the burr protruding peripheral surface of the core on the lower table and the burr removing chain hanging from the upper table are relatively moved in sliding contact with each other to project from the peripheral surface of the core. The burrs are scraped off, but the upper table is repeatedly moved up and down by the elevating and lowering means to simultaneously vibrate in the horizontal direction, and this vibration also vibrates the deburring chain in the horizontal direction. Even if the burr protruding peripheral surface of the core is complicated and complicated, it is not only necessary not to generate a portion where the chain does not contact, but it is also possible to give the chain a burr sliding contact action and a burr striking action. , Burrs protruding from the circumferential surface of the core by both synergy and reliably efficiently can be removed.

Therefore, as compared with the case where the conventional manual work is relied upon, the efficiency of the deburring work can be greatly improved and rationalized, and the cost of the product can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of the entire device of the present invention.

FIG. 2 is a bottom view of the upper table.

FIG. 3 is a plan view of a lower table.

FIG. 4 is a plan view showing a relationship between a core, a deburring chain, and a deburring knife-shaped strip plate.

FIG. 5 is a perspective view of the relevant part.

FIG. 6 is a vertical cross-sectional side view of a main part showing a mounting structure of a deburring chain.

[Explanation of symbols]

 1 Lower Base 2 Core Support Jig 3 Core Support Jig 4 Lower Base 5 Elevating Guide Rod 12 Elevating Guide Rod 6 Cylinder Unit as Elevating Driving Means 13 Cylinder Unit as Elevating Driving Means 7 Upper Platform 8 Burr Removing chain 9 Deburring chain 11 Upper base 14 Vibrating means 15 Elastic body for cushioning 16 Coil spring 17 Core 17a Burr 17b Burr protruding peripheral surface 17c Slit-shaped portion 20 Knife-shaped strip 22 Knife-shaped strip

Claims (1)

[Scope of utility model registration request] 1. A lower table provided with a jig for supporting a mold core in a posture in which a burr projects in a substantially horizontal direction from a peripheral surface, and a position corresponding to the contour of the burr projecting peripheral surface of the core on the jig. The upper table with a large number of deburring chains hanging down, the elevating drive means for repeatedly moving the upper table up and down in the perspective direction relative to the lower table, and the upper table while repeatedly moving the upper table up and down by the elevating drive means. A deburring device for a mold core, comprising a vibrating means for vibrating in a horizontal direction.