From 21 to 24 April, Dr. BOY GmbH & Co. KG will be present at the Chinaplas trade fair in Shanghai (Hall 2.1, Stand F86), together with its Chinese representative Andeli Co., Ltd. The trade fair presentation focuses on two applications in the field of medical technology, which underline the manufacturer's specialisation in micro and precision injection moulding. Both demonstrated applications concern small parts with very low part weight, typical of demanding medical uses where process repeatability and dimensional stability are crucial.
On the smaller BOY XS E injection moulding machine, production of a resorbable tissue clip made of polydioxanone for surgical use will be demonstrated. The second application, running on the BOY 25 E machine, involves production of a threaded rod forming part of the dosing mechanism in an insulin injection pen. Both examples illustrate the requirements placed on the manufacture of medical plastic components in terms of dimensional accuracy, surface quality and stable series production.
Micro injection moulding of a resorbable PPDO clip
On the BOY XS E injection moulding machine, a fully resorbable tissue clip for use in surgery is produced. The part is made from polydioxanone (PPDO), a material used in medical products, with a single article weight of 0.105 g. The process is carried out in a 2-cavity mould with a shot weight of 0.5 g.
The use of such a low shot weight highlights the capabilities of the BOY XS E in processing sensitive materials and very small material doses. For bioresorbable implants such as the tissue clip presented, maximum precision of injection parameters, process stability and high repeatability are of key importance. The micro injection moulding technology used in BOY machines is designed to meet these requirements, enabling the production of very low-mass parts while maintaining tight dimensional tolerances.
Precision injection pen component on the BOY 25 E machine
The second application presented concerns the production of a threaded rod for dosing an insulin cartridge used in drug delivery devices. The polystyrene (PS) component has a part weight of 0.68 g. It is manufactured in an 8-cavity mould with a shot weight of 5.44 g.
In this type of medical product, dimensional accuracy, surface quality and process stability in series production are all important. The application on the BOY 25 E machine shows how high-precision medical components made of plastics can be manufactured economically and with repeatable quality. It is particularly important to ensure dimensional consistency across the entire mould cavity layout so that all eight parts meet the assembly requirements for the dosing system.
Growing importance of medical technology on the Chinese market
The manufacturer and its Chinese representative point to the dynamic development of the medical technology market in China. Xin Bingbin, manager at Andeli Co., Ltd., emphasises: "The market for medical technology in China is growing very dynamically. Against this backdrop, we are presenting two machines for specific medical components that are intended as implants for surgical applications. Micro injection moulding is one of the greatest strengths of BOY injection moulding machines. Our customers particularly appreciate the ability to produce high-quality, precise components with high added value on BOY machines."
The Chinese medical device market places high demands on quality, efficiency and reliability of the manufacturing process. By offering compact, energy-efficient and high-precision injection moulding machines, Dr. BOY GmbH & Co. KG addresses the needs of producers of specialised medical products, especially in the area of micro part and small part production. The combination of a small footprint with the ability to meter very small quantities of material is a key factor for plants manufacturing implant components and parts for dosing devices.
Presentation of BOY injection moulding machines at Chinaplas
During the Chinaplas trade fair in Shanghai, visitors will be able to see the BOY XS E and BOY 25 E injection moulding machines in operation in real medical applications. The demonstrations include the full injection cycle with moulding of parts and presentation of finished mouldings, allowing assessment of process parameter stability for low shot weights and short cycle times. The stand of Andeli (Hall 2.1, F86) is intended to provide direct insight into the technological capabilities of BOY machines in micro injection moulding and precision injection moulding for medical applications.
