JPH01138055A - Device for removing burr of core in die - Google Patents

Abstract

PURPOSE:To efficiently remove burr of a core by providing a lower table providing jigs for supporting the casting core, an upper table hanging down chains for removing burr corresponding to burr projected peripheral face of the core, lifting driving means for both upper and lower tables and horizontal vibrating means in the upper table. CONSTITUTION:The manufactured core 17 is supported with the jigs 2, 3 on the lower table 1 under posture, which the burr 17a is projected to horizontal direction. The upper table 7 is descended from an ascending limit position C to a descending limit position D with a cylinder unit 13. At the same time, the lower table 1 is ascended from a descending limit position A to an ascending limit position B with a cylinder unit 6. By driving the vibrating means 14, the upper table 7 is vibrated toward horizontal direction. In this result, the descended chains 8, 9 is descended along the burr projected peripheral face 17b of the core 17 and as the chains 8, 9 are vibrated to horizontal direction, the sliding-contact movement beating from the side direction is executed. By this method, the burr projecting from the peripheral face of the core can be surely and efficiently removed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a deburring device for mechanically removing burrs protruding from the peripheral surface of a mold core, which is a sand mold.

(Prior art and its problems) A mold core, which is a sand mold, is formed by filling mold river sand mixed with a binder such as a thermosetting resin into a split mold and hardening it. The portion that protrudes into the boundary portion remains as a so-called burr. These burrs must be completely removed, but in the past, they were scraped off manually using a bamboo spatula, which required a great deal of effort and time, reducing core manufacturing costs. I couldn't lower it.

(Means for Solving the Problems) The present invention proposes a mold core deburring device that can solve the conventional problems as described above. A lower stand equipped with a jig that supports the mold core in a horizontally protruding position, and a number of deburring chains are suspended from the jig at positions corresponding to the outline of the burr-protruding peripheral surface of the core. The present invention includes an upper table, an elevating drive means for moving at least one of the upper and lower tables vertically up and down relative to the other table, and a vibration means for vibrating the upper table in the horizontal direction.

(Example) An example of the present invention will be described below based on the attached illustrative drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a lower base on which core supporting jigs 2.3 are arranged side by side on the upper surface, and a pair of left and right lifting guide rods 5 are placed on the lower base 4. It is supported so as to be movable up and down between a lower limit position A and an upper limit position B, and is driven up and down by a cylinder unit 6 serving as a lift drive means. Reference numeral 7 denotes an upper stand from which deburring chains 8 and 9 are suspended, and a pair of left and right lifting guide rods 12 are provided below the upper base 11 supported by the base 4 via a support 10. It is supported so as to be movable up and down between the upper limit position C and the lower limit position via the upper limit position C, and is driven up and down by a cylinder unit 13 serving as an elevator drive means.

A vibration means 14 using an air cylinder is connected to the upper table 7 to vibrate the upper table 7 in the horizontal direction. In order to allow the vibration means 14 to vibrate the upper base 7 without any trouble, a buffering elastic body 15 is interposed between the piston rond 13a of the cylinder unit 13 and the upper base 7. The hole through which the side elevation guide rod 12 passes is provided with a margin so that the elevation guide rod 12 can vibrate integrally with the upper table 7. Of course, a buffering elastic body may be interposed between the elevating guide rod 12 and the upper table 7. Coil springs 16 are supported on the upper surface of the four corners of the upper base 7 via pins 16a, and are designed to be slightly compressed between the upper base 11 and the upper base 11 when the upper base 7 is at the upper limit position C. It is composed of

As shown in FIGS. 3 and 5, the jigs 2 and 3 are configured so that they can each support the mold core 17 with the burr 17a protruding from the peripheral surface 17b in a substantially horizontal direction. Although various types of jig 2.3 are used depending on the shape of the core 17, the illustrated jig 2.3 has shaft portions 2a and 3a that fit into holes formed in the core 17. , and plate portions 2b and 3b close to one side of the core 17. The deburring chains 8, 9 are mounted on an upper stand 7, as shown in FIG.
Each eye bolt 18
By closely inserting the upper end rings 8a and 9a of each chain 8 and 9 between them, as shown in FIGS. 2 and 4, the burr protruding peripheral surface of the core 17 on the jig 2.3 is 17b
It hangs down from the upper stand 7 in the shape of a ball curtain from a line corresponding to the outline of . And the length of this chain 8.9 is
As shown in FIG. 1, when the upper stand 7 is at the upper limit position C, the lower ends of the chains 8 and 9 have a length that reaches below the upper limit position B of the lower stand 1.

To explain how to use it, the produced core 17 is held in a predetermined position with the burr 17a protruding horizontally from the circumferential surface 17b as described above, and the shaft parts 2a, 3a and Once the plate parts 2b and 3b are used to support the upper table 7, the vibration means 14 is activated to vibrate the upper table 7 in the horizontal direction, and the upper table 7 is moved from the upper limit position C to the lower limit position. At the same time, the lower table 1 is raised from the lower limit position A to the upper limit position B. As a result, the chains 8 and 9, which descend together with the upper table 7, descend along the burr protruding peripheral surface 17b of the core 17 on the rising lower table 1. Since the core 9 is vibrating in the horizontal direction due to the vibration of the upper base 7, it performs a sliding movement so as to positively hit the burr protruding peripheral surface 17b of the core 17 from the lateral direction.

Therefore, after the lower platform 1 reaches the upper limit position B, while the lower platform 1 is stopped at the upper limit position B, only the upper platform 7 is moved between the lower limit position and the upper limit position C. By repeatedly moving up and down a plurality of times, the burrs 17a protruding from the burr protruding peripheral surface 17b of each core 17 supported on the lower base 1 come into contact with the burrs 17a4, and the vertical movement and horizontal lateral direction Each of the chains 8, which performs a vibrating motion;
The burrs are removed reliably by the scraping or knocking off action in step 9. The deburred core 17 is placed on the lower stand 1.
can be removed from the jigs 2 and 3 by lowering and returning to the lower limit position A, and raising and returning the upper table 7 to the upper limit position C.

The direction of vibration of the upper table 7 must be set in a direction that allows the burr 17 to be removed most efficiently, depending on the shape of the burr protruding peripheral surface of the core 17 placed on the lower table 1. The chains 8 and 9 are constructed by selecting the wire diameter, ring size, wire material, etc. so as to remove the burr 17a most efficiently, as shown in FIGS. 4 and 5. If there is a slit-like portion 17c on the burr protruding peripheral surface +7b of the core 17, into which the chains 8 and 9 cannot enter, the slit-like portion 17 will be removed as the lower table 1 moves upward.
The knife-shaped band plate 20 that enters into the C can also be suspended with its upper end supported by an intermediate base 21 supported by the support column 10, as shown in FIGS. 1 and 2, for example. Furthermore, if a perfectly linear plane exists on the burr protruding circumferential surface 17b of the core 17, as the lower table 1 moves upward, the burr protruding circumferential surface 17b of the linear plane will be removed as shown in FIG.
It is also possible to suspend the knife-like strip plate 22 that slides in contact with the intermediate base 21 with its upper end supported by the intermediate base 21, as shown in FIGS. 1 and 2. In other words, it is possible to use not only the chains 8 and 9 but also the fixed knife-like strips 20 and 22 for scraping off the burr 17a as described above. In addition, a group of chains that act on one core 17 are not all composed of the same chain, but are made up of all chains.
In order to remove J 17 a most efficiently, it is also possible to combine a plurality of types of chains with different wire diameters, ring sizes, or wire materials.

In the above embodiment, two cores 17 can be processed simultaneously, but the number of cores 17 that can be processed simultaneously is not limited. In addition, the deburring chain used in the present invention includes not only a general chain with connected rings, but also various types of chains, such as those made of spheres connected with a wire, and a single flexible rope. It includes various types of flexible chains of appropriate weight with irregularities on the circumferential surface, such as those with spheres attached at equal intervals. Furthermore, in the embodiment, the lower stand 1 and the upper stand 7
Although the configuration is such that both of them are raised and lowered, it is also possible to be configured such that only one of them is raised and lowered.

(Operations and Effects of the Invention) As described above, according to the mold core deburring device of the present invention, when the core is held in a predetermined position on the jig on the lower stand, both the upper and lower stands are The periphery of the core is removed by driving at least one of them up and down to move the burr protruding peripheral surface of the core on the lower table and the deburring chain hanging down from the upper table relative to each other in sliding contact with each other. To scrape off the burrs protruding from the surface, the upper table is vibrated horizontally,
This vibration also causes the deburring chain to vibrate in the horizontal direction, so even if the burr protruding circumferential surface of the core is complicated, not only will there be no areas where the chain does not come in contact with the core. Since the chain can be given a burr beating action, burrs protruding from the surface of the core can be removed reliably and efficiently.

Therefore, compared to the conventional case of relying on manual work, the efficiency and rationalization of the deburring work can be greatly increased, which can contribute to reducing the cost of the product.

[Brief explanation of the drawing]

Figure 1 is a front view of the entire device, Figure 2 is a bottom view of the upper stand,
Fig. 3 is a plan view of the lower stand, Fig. 4 is a plan view showing the relationship between the core, the deburring chain, and the deburring knife-shaped strip;
FIG. 5 is a perspective view of the main part, and FIG. 6 is a vertical sectional side view of the main part showing the structure of the attachment of the deburring chain. 1... Lower stand, 2.3... Core support jig, 4...
・Lower base, 5, 12... Lifting guide rod, 6, 1
3...Cylinder unit as a lifting drive means, 7
...Upper stand, 8.9...Deburring chain, 11.
... Upper base, 14 ... Vibration means, 15 ... Shocking elastic body, 16 ... Coil spring, 17 ... Core, 17a ... Burr, +7b ... Burr protruding peripheral surface , 17
c...Slit-shaped portion, 20.22...Knife-shaped strip plate. Patent applicant: Nakamura Metal Industry Co., Ltd.

Claims (1)

[Claims] A lower stand is equipped with a jig that supports the mold core in a position where the burrs protrude from the circumferential surface in a substantially horizontal direction, and a large number of burrs are removed on the jig at positions corresponding to the contour of the burr protruding circumferential surface of the core. The apparatus comprises an upper table on which a chain for use hangs, an elevating drive means for moving up and down at least one of the upper and lower tables in the distance direction relative to the other table, and a vibration means for vibrating the upper table in the horizontal direction. Deburring device for mold cores.