Technical Strength of the Enterprise and the Importance of Thimble Parts

Precision manufacturing hinges on the meticulous pursuit of details. Through innovative machining processes and strict quality control, Sinbo Precision transforms ordinary thimble components into critical parts that ensure production efficiency.

Sinbo Precision stands as a leading enterprise in the field of precision part manufacturing, and its thimble machining technology highlights characteristics of high precision, high efficiency, and high reliability. Though small, thimbles play a vital role in molds and automated equipment, their quality directly affecting the stability of the entire production system and the accuracy of the final products.

Sinbo Precision possesses profound technical accumulation and rich industry experience in the field of precision part manufacturing. The company is committed to providing global customers with high-quality precision component solutions.

Thimble parts, as crucial components in molds and automated equipment, play an essential role despite their small size. They are widely used in industrial sewing, leather processing, textile manufacturing, and automotive component production, among other fields, responsible for positioning, ejection, or transmitting precise power.

The quality and precision of thimbles directly impact the efficiency of the entire production process and the quality of the final product. Sinbo Precision deeply understands this, thus implementing strict process control and quality management in its thimble machining process.

Thimble part machining faces several technical challenges. These challenges include material selection, precision forming, heat treatment, and surface treatment, among other stages. Each stage requires precise control, as any slight deviation may lead to part failure.

Sinbo Precision successfully addresses these challenges by optimizing the machining process route. According to precision machining requirements, Sinbo Precision adopts a comprehensive process route: Grinding Machine → Milling Machine → Drilling Machine → Tapping Machine.

In the grinding machine stage, Sinbo Precision precision grinds the thickness of the lower ejector plate to exact dimensions, ensuring basic size accuracy. In the milling machine processing stage, the upper and lower ejector plates are set together for machining, guaranteeing matching precision.

During the drilling process, Sinbo Precision strictly controls the tolerance ranges of various holes: the diameter tolerance of screw through holes is controlled at -0.3 to +0.1mm; the diameter tolerance of sleeve pin through holes is -0.1 to +0.2mm; and the diameter tolerance of support head holes is -0.2 to +0.5mm.

Sinbo Precision implements multiple precision machining processes during thimble production. For the upper ejector plate, the company performs groove milling processing, including oblique roof seat groove processing (length and width tolerance of -0 to +0.1, step depth tolerance of -0 to +0.02).

The height tolerance for the ejector pin cup head is strictly controlled at -0 to +0.01mm, and the height tolerance for the support pin cup head is -0 to +0.05mm. This strict tolerance control ensures high-precision matching of thimble assemblies.

For the lower ejector plate, Sinbo Precision also performs precision groove milling processing: the length and width tolerance of the wear-resistant plate groove is -0 to +0.01mm; the length and width tolerance of the microswitch groove is -0.05 to +0.2mm.

In the spring glue hole process, the aperture tolerance is controlled at -0.01 to +0.1mm, and the depth tolerance is -0 to +0.05mm. These precise dimensional controls ensure the interchangeability and reliability of the thimble parts.

In the tapping process, Sinbo Precision uses different air pressure parameters according to different thread types: when tapping M4, M5, and M6 threads, the air pressure is set at (3Pa-4Pa); when tapping M8, M10, and M12 threads, the air pressure is (5Pa-8Pa). This parametric control ensures the stability of thread quality.

The technical highlights of Sinbo Precision in thimble machining are mainly reflected in the following aspects:

High-precision machining capability reaches industry-leading levels, enabling the handling of extremely strict tolerance requirements. The tolerances of some critical dimensions are controlled at the micron level, which requires machine tool accuracy, tool management, and operational skills to reach very high standards.

Sinbo Precision has also achieved optimized integration of the machining流程. By scientifically arranging and combining grinding, milling, drilling, and tapping processes, the number of workpiece clampings and benchmark conversions is reduced, improving machining efficiency and accuracy consistency.

In terms of surface treatment technology, Sinbo Precision adopts advanced electroplating and oxidation anti-rust processes, ensuring that the thimble parts have excellent wear resistance and corrosion resistance, extending their service life.

Thimble parts produced by Sinbo Precision are widely used in various industrial fields. In the automotive manufacturing industry, thimble parts are used in the production and assembly of automotive interiors and precision sensors.