Manufacturing method applied to plastic body of magnetic element and plastic body

Abstract

The invention provides a manufacturing method applied to a plastic body of a magnetic element and the plastic body. The manufacturing method comprises the following steps that a first mold core and a second mold core are provided, and the first mold core and the second mold core are oppositely arranged in a first direction; a third mold core is provided, the third mold core is adjacent to the first mold core and the second mold core in the second direction, and the second direction is perpendicular to the first direction; at least one hole insert is provided, the at least one hole insert is detachably installed on the first mold core, the second mold core or the third mold core, and the hole insert is used for forming a wire pin fixing hole of a magnetic element winding terminal pin; and injection molding is carried out on a mold cavity synthesized by the first mold core, the second mold core, the third mold core and the at least one hole insert to obtain the plastic body.

Description

technical field [0001] This case relates to the field of injection molding, in particular to a manufacturing method and plastic body applied to magnetic components. Background technique [0002] According to the difference in power or current of the magnetic element, the range of wire diameters used varies greatly. Therefore, under the premise of using the same type of magnetic core, the same type of winding bobbin can be shared due to the different wire diameters selected. Limited, the main reasons are as follows: the long pin hanging wire on the winding frame is only suitable for winding with a small number of strands or small wire diameter, and when the wire diameter is large or the number of strands is large (such as 0.1x80 strands or more), due to the lead wire The flow capacity is limited and wires are required to be used as lead pins. However, the winding frame using wires as lead pins needs to be designed according to the selected wire diameter and number of strands,...

AI Technical Summary

Problems solved by technology

[0002]According to the difference in power or current of the magnetic element, the range of the diameter of the wire used is quite different. The wire diameters of different wires are different, and the same type of winding frame that can be shared is limited. The main reasons are as follows: the long pin hanging wire on the winding frame is only suitable for winding with small strands or small wire diameters, while the winding with larger wire diameters or strands When there are more (such as more than 0.1x80 strands), due to the limited conduction capacity of the pins, it is necessary to use wires as lead pins, but the winding skeleton using wires as lead pins needs to be matched according to the selected wire diameter and number of strands. As a result, different winding wire diameters and strand numbers need to correspond to different molds. The range of commonly used multi-strand wires is 0.1x80 strands (the wire diameter is about ) ~ 0.1x350 strands (diameter of about ), or even more strands, when the difference in the number of strands exceeds 10 strands, It is necessary to re-open the mold, and when the number of strands spans more than 4 times, the number of molds that need to be opened will be more, which will greatly increase the cost

Of course, it is also possible to use an additional base or substrate to fix the lead pins, but it will also greatly increase manpower and cost

[0003] At present, the more common solutions to using wires as lead pins include: ① Winding wires on the skeleton, and adding an epoxy board base or substrate (such as FR-4) Assembling, and punching holes on the epoxy board base or substrate to fix the lead pins, this process is cumbersome and greatly increases labor costs; ②Adjust the thimble on the mold, and adjust the hole size within a small range of 0.5mm to share For wire diameters with a similar number of strands, this common mode method cannot change the product size and hole center position, but can only modify the hole size, so that the existing small-diameter products cannot meet the requirements of large wire diameters, and the wall thickness strength and size between the holes are not enough. , or the existing large-aperture products can meet the small-aperture requirements, but the product size is too large, resulting in a large space occupation

Therefore, the above two methods do not solve the above problems well.

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