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View MoreThe influence of connection method on installation accuracy and safeguard measures
1. Bolt fixing method
Bolt fixing is one of the more common and reliable connection methods. When bolt fixing is adopted, the bolt holes are accurately reserved on the plastic lumbar support backrest frame and the seat body through precise mold design and manufacturing. The accuracy of the mold directly determines the accuracy of the hole position. The company's advanced production equipment and professional production technology team can ensure that the mold manufacturing error is controlled within a very small range.
During the installation process, high-precision positioning tooling will be used. The positioning tooling can accurately position the backrest frame and the seat body to ensure that the bolt holes of the two are completely aligned. At the same time, a torque control tool is used to tighten the bolts and operate according to strict torque standards. Bolts of different specifications and materials correspond to different torque requirements. By accurately controlling the torque, the bolt connection can achieve a stable and uniform tightening degree, avoiding installation deviations caused by uneven bolt tightening force.
In addition, the company's perfect testing system will conduct multi-dimensional testing on the products after bolting. Use high-precision testing equipment such as three-coordinate measuring instruments to measure the size and position accuracy of the connection parts to ensure that the actual installation accuracy meets the design requirements. For products that do not meet the accuracy standards, timely adjustments or rework will be made to ensure that each product shipped has high-quality installation accuracy.
2. Embedded snap-on method
Embedded snap-on connection is easy and fast to install. To ensure installation accuracy, Zhejiang Lubote Plastic Technology Co. , Ltd. will conduct a lot of simulation analysis and experimental verification when designing the snap-on structure. Through computer-aided design (CAD) and finite element analysis (FEA), the shape, size, elasticity and other parameters of the snap-on are optimized to ensure that it can achieve accurate embedded installation while ensuring the connection strength.
During the production process, the molding process of plastic parts is strictly controlled. High-precision injection molding equipment is used to accurately control the injection molding temperature, pressure, time and other process parameters to ensure the size accuracy and shape accuracy of the snap-on parts. Regular maintenance and care are performed on the injection mold, and worn parts are repaired or replaced in time to ensure the long-term stable accuracy of the mold.
During the installation process, a special installation guide structure will be designed. For example, a guide groove is set on the seat body, and a guide slope is set at the buckle part of the backrest frame, so that the buckle can be smoothly and accurately embedded in the corresponding position. After the installation is completed, the installation accuracy is preliminarily judged through appearance inspection and simple functional tests, such as checking whether the buckle is fully embedded and whether there is any looseness. For important products, further mechanical properties tests will be carried out to ensure the reliability and installation accuracy of the buckle connection.
Tolerance control of plastic parts
1. The importance of tolerance control
Tolerance control of plastic parts is crucial to ensure the connection accuracy of the ergonomic plastic lumbar support backrest frame and the seat body. A reasonable tolerance range can ensure the matching accuracy between the various components, so that the product has good stability and comfort during use. If the tolerance is too large, it may cause problems such as loose connection parts and uneven gaps, affecting the performance and life of the product; if the tolerance is too small, it may increase the difficulty and cost of production, and even cause the components to fail to install smoothly.
2. Tolerance control range
Zhejiang Lubote Plastic Technology Co. , Ltd. has determined a scientific and reasonable tolerance control range for plastic parts in its long-term production practice, combining the design requirements of the products with the actual production process level. For key dimensions that are closely related to installation accuracy, such as the diameter and position dimensions of bolt holes, the shape and matching dimensions of buckles, etc., the tolerance control is relatively strict. Generally speaking, the tolerance range of key dimensions is controlled between ±0.1 - ±0.3 mm.
For some non-critical dimensions, such as the appearance dimensions of plastic parts and structural dimensions that have little effect on installation accuracy, the tolerance range can be appropriately relaxed, usually controlled between ±0.3 - ±0.5 mm. This can not only ensure the quality and performance of the products, but also reduce production costs and improve production efficiency to a certain extent.
3. Tolerance control methods
In order to achieve the above tolerance control range, the company has adopted a series of effective control methods. First of all, in terms of raw material selection, the quality of plastic raw materials is strictly controlled. Select raw materials with stable quality and performance that meet the requirements to avoid product size deviations caused by fluctuations in raw material performance.
In terms of production technology, the injection molding process parameters are continuously optimized. Through multiple tests and data analysis, the best combination of injection temperature, pressure, time and other parameters is determined, and real-time monitoring and adjustment are carried out during the production process. An advanced mold temperature control system is used to ensure the uniformity and stability of the mold temperature and reduce the dimensional deformation of plastic parts caused by changes in mold temperature.
In addition, the company has established a complete quality inspection system. During the production process, plastic parts are inspected in multiple processes. From the inspection of raw materials entering the factory, to the inspection of semi-finished products, to the final inspection of finished products, every link is strictly carried out in accordance with the standards. Use high-precision testing equipment, such as optical measuring instruments, image measuring instruments, etc., to accurately measure the dimensions of plastic parts, and promptly detect and correct dimensional deviations. For products that exceed the tolerance range, they are isolated, the causes are analyzed, and corresponding corrective measures are taken to ensure the stability of product quality.