Small laboratory Sigma blade mixer for silicone hot melt adhesive butyl adhesive

The small laboratory screw extrusion kneading machine is a high-precision mixing and extrusion equipment designed specifically for laboratory research and small-scale trial production. It is suitable for uniform kneading and continuous discharge of high viscosity materials such as silicone rubber, butyl rubber, hot melt adhesive, resin, plastic, etc. This type of equipment has the characteristics of compact structure, easy operation, precise temperature control, and vacuum degassing, and is widely used in fields such as chemical engineering, new materials, food adhesives, and electronic packaging.

1、 Core functions and technical features

Efficient mixing and strong shear design

Using Z-shaped or ∑ - shaped stirring blades, the main shaft rotates in opposite directions at different speeds (usually 20-40 RPM for the main shaft and 10-20 RPM for the secondary shaft), forming a multidimensional shear force field in the W-shaped mixing cylinder to achieve deep kneading, folding, and uniform dispersion of materials.

Screw extrusion continuous discharge

Different from the traditional flipping cylinder discharge method, the screw extrusion design can achieve continuous discharge in a closed environment, avoiding material exposure and pollution. It is particularly suitable for the treatment of materials such as hot melt adhesive, butyl adhesive, etc. that cool quickly or are prone to oxidation.

Vacuum defoaming system

Equipped with a vacuum pump, the working vacuum degree can reach ≤ -0.094 MPa, effectively removing bubbles from materials, improving product density and mechanical properties, especially suitable for materials such as HTV silicone rubber and sealant that require high airtightness.

Precise temperature control system

The jacket supports electric heating, thermal oil or water cooling methods, with independent temperature control in multiple zones (commonly 3-4 zones). The temperature control accuracy can reach ± 2 ℃, ensuring stable and controllable reaction processes.

Material contact material is safe and reliable

The mixing tank and stirring blade are made of stainless steel 304 or 316L, which is corrosion-resistant and easy to clean, meeting the production requirements of food grade and pharmaceutical grade.

2、 Selection suggestions (for laboratory usage scenarios)

If used for formula development and small-scale testing, priority should be given to models with a capacity of 5-10L, vacuum and screw extrusion functions.

If you need to interface with industrial production parameters, it is recommended to choose a model with adjustable speed, multi zone temperature control, and data recording function for process amplification and parameter reproduction.

If handling food grade or pharmaceutical grade materials: it is necessary to confirm that the contact parts are made of 316L stainless steel and have a quick disassembly structure for cleaning.

Sigma mixer is suitable for various high viscosity materials and can be used for multiple purposes with one machine

Suitable for silicone rubber, butyl rubber CMC、 Mixing and kneading of various high viscosity or high elasticity materials such as ink, plastic additives, cosmetic pastes, etc.

After replacing the mold head, different shapes of extrusion molding can be achieved, with the potential for integrated mixing and granulation in the front stage.