Double-rotation type core pulling structure

Abstract

The invention discloses a double-rotation type core pulling structure. The invention relates to a plastic mold, in particular to a brush needle drawing structure for pore planting forming in a toothbrush forming mold. The double-rotation type core pulling structure is exquisite in design, compact in structure and capable of achieving the annular inclined hole core pulling layout rotating around the same circle center with different diameters. The bearing is adopted on the brush needle fixing assembly and fixedly installed in the bearing fixing base, the brush needles are fixed in the bearing through the brush needle fixing base, the guide needles are arranged on the peripheries of the brush needles on the brush needle fixing base, and when the device is separated from a product up and down in a mold, transverse acting force tangent to the circumference can be generated when the device moves downwards, so that the brush needles are separated from the product. The acting force is transmitted to the brush needle fixing seat through the guide needle and rotates under the assistance of the bearing, and finally the purpose that the brush needles rotate around the same circle center for core pulling is achieved. The core-pulling mechanism can effectively and reliably carry out core-pulling on the brush needles which are arranged in a rotating and inclined mode and have different diameters, and the final forming quality of products is not affected.

Description

technical field [0001] The invention relates to a plastic mould, in particular to a brushing needle structure for forming pores in toothbrush molding moulds. Background technique [0002] At present, when most toothbrush processing enterprises in the industry process toothbrushes, the corresponding brush heads in the mold need to form the planted pores at one time, and the planted pores need to be formed by brush needles. Generally, the structure of the mold needs to be equipped with brush needle structures accordingly. On August 8, 2012, the State Intellectual Property Office published a patent titled "A Toothbrush Mold Brush Needle Device", publication number: CN102626967A. All are separated from the upper mold smoothly, and after a certain period of delay (that is, the time of the first parting), the brush needle is separated from the product during the second parting process, and finally the product is ejected through the discharge push rod. [0003] With the increasing...

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Problems solved by technology

[0003]As electric toothbrushes are updated day by day, in order to pursue better tooth cleaning effect, the bristle layout of electric toothbrush heads is also constantly updated, so it appears (such as Figure 15), the bristle hole is in The circumferences of different diameters are inclined, and the bristle holes on the same diameter circles are inclined in the same direction (forward rotation or reverse rotation), according to the conventional brushing needle structure (such as Figure 16), the drawing needles are clustered in the same direction, usually only the four directions of "up, down, left, and right" in the plane can be realized Inclined core-pulling, but it is difficult to realize the core-pulling of inclined holes rotating around the same circle center. If the conventional structure is used, the structure will be complicated, the cost will be too high and the stability will be low

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