Brief analysis of laboratory consumable pipette tips production process

Brief analysis of laboratory consumable pipette tips production process

Pipette tips, also known as gun head, pipette nozzle, a plastic consumable in the field of experimental diagnosis, is a disposable consumable that accurately inhales a certain amount of detection reagents to be released into the corresponding detection tools with pipette or automatic work station. According to different applications, it is roughly divided into standard pipette tips, filter core pipette tips, low adsorption pipette tips, automatic work station  pipette tips and wide mouth pipette tips.

In the actual application process, the pipette tip is in direct contact with the sample liquid, which will not only affect the accuracy of the pipette result, but also affect the analysis result directly if there is foreign biological contamination or dissolved matter in the pipette tip. High quality pipette tip must have the following characteristics:

1. Small mouth end without burr, notch;

2. Good adaptability and sealing;

3. Uniform wall thickness, smooth inner wall, no residue pipette;

4. Consistent pipette accuracy.

Product characteristics and large demand in application have put forward extremely high requirements for molds, molding equipment, production technology, production environment, quality control and other aspects during production which can be summarized as follows:

1. Mold making

From structural design, steel selection, parts processing, polishing to the complete mold, every process must be carefully controlled. Good structural design is the premise of mass production stability, the selection of steel and the precision of parts processing is the basis of mass production stability. From design, processing, to the final assembly how to process control and effective connection is the difficulty of mold production. Mold production should focus on the following points:

Structural design, exhaust and cooling methods

Choice of steel

Precision control of mold frame, mold kernel and parts processing

Surface polishing

2. Injection molding

The stability of mass production requires high precision molds as the basis, but also requires a good production process including careful planning and preparation from all aspects of production environment, machine selection, molding process and so on. Simply including following aspects:

High quality raw materials 

More than 100,000 purification workshop production environment

Adopt imported high speed electric injection molding machine

Reasonable and stable forming process

3. Automatic production

High-precision molds can greatly reduce injection defects, and automatic production can greatly reduce the pollution brought by personnel to avoid assembly and packaging defects; Visual inspection technology can realize 100% product online inspection, eliminate the defective products generated by injection molding, assembly, packaging and other processes, avoid the inflow of defective products to end customers, reduce customer complaints, largely increase the production output and working efficiency.

4. Quality control

In order to ensure the qualified rate of products and effectively improve the yield of production process, the corresponding control scheme should be formulated according to different product problems. The quality inspection personnel, the use of inspection and testing equipment, should be systematically trained, and the testing environment should also be strictly controlled. Specified as below:

Good quality control process

Constant temperature and humidity test environment

Professional testing personnel and equipment