Applications of a Vacuum Mixer

Vacuum environments accomplish a number of goals, from improving the appearance of molded products to thwarting unwanted chemical reactions and microbial growth. For pharmaceuticals, minimizing oxygen content is essential to prolonging shelf life.

In such cases, the vacuum mixer is used to evacuate and dry dispersions. It also helps to disperse powdered active substances in liquids.

Preparation of cements and amalgams

Vacuum mixers have many applications in the preparation of cements and amalgams. For example, in dentistry, they can be used to mix and degass ointments and impression materials, such as alginates. They are also used to prepare bone cements for dental procedures. In addition, they can be used to prepare various types of industrial and manufacturing materials, such as epoxy resins.

An automatic dental amalgam dispenser-mixer is designed to provide a controllable, reversible mixture of the two co-reactive basic ingredients (mercury and silver powder) that make up an amalgam. The apparatus comprises a plurality of conveyors, a control unit, and a mixing vacuum mixer vessel. The conveyors include a first conveyor for the mercury and a second conveyor for the silver powder. The control unit provides a stored program for controlling the actuation of each conveyor and the mixer.

A vacuum mixer homogenizer is capable of providing full vacuum or internal pressure operation, depending on the application. It can also be equipped with a temperature control system for heating or cooling. It has a jacket for heat transfer and multiple agitation systems to handle the wide range of viscosities that can be processed. These systems can be combined to produce a highly efficient, multipurpose system. Olsa vacuum mixers are available in a variety of sizes to suit the needs of any laboratory or office. They can be equipped with a sight glass to monitor the contents as they are mixed and to avoid premature vacuum breakdown.

Preparation of gels and pastes

The vacuum mixer mixes ingredients in an environment devoid of air, which avoids incorporation of bubbles into the mix. These bubbles can cause foaming and formation of air pockets in the final product. This mixing method is widely used in pharmaceutical, chemical and food industries to process ingredients that are sensitive to air. This type of equipment is also suitable for a variety of applications in the cosmetic industry, including the production of gels and pastes.

A vacuum emulsifying machine is ideal for high viscous materials, which require constant and powerful mixing action to achieve perfect emulsification and to create fine end products with no bubbles. A vacuum mixer can also be used to produce a range of liquid-to-paste-like applications in the food industry, such as sauces, ketchup, fish paste, jam, and chocolate fillings.

Vacuum emulsifying machines are available in tabletop and industrial models, with batch sizes that vary from 20-3000 liters. They can be equipped with a pre-mix boiler, rheology modifier, powder material hopper, vacuum pump, and operating platform.

A vacuum mixer is often used to make a solid surface matrix blend for manufacturing popular designs in today’s kitchen and bathroom mixer manufacturer market. The mixer eliminates the need for a wet casting process and ensures that the matrix blend is free of voids. The vacuum mixer can be combined with a hot-water mixer to provide the ideal heat transfer conditions for the blending process. The process can be controlled using a computerized system that adjusts the temperature and speed of the machine to achieve the desired result.

Preparation of syringe fillings

A vacuum mixer can help prepare syringe fillings by eliminating the need to stir and mix the material manually. This process allows for more precise application of compound and a faster turnaround. It also reduces air incorporation into the mixture to prevent bubble formation. This helps ensure a consistent compound that is less likely to void or degrade during storage.

The void-free nature of a syringe filling is critical in many applications, including optical bonding and structural adhesives. Imperfections in these types of bonds can cause deterioration, loss of optical clarity, or stress concentration. The syringe filling process is very complex and requires strict quality controls, specialized equipment, and extensive validation.

To make sure the mixture is void-free, it must be aseptically processed in a cleanroom. This is especially important for medications and other liquid formulations, which must meet rigorous standards to be sterile. The use of a vacuum mixer can help ensure that the mixture is free from bacteria, fungi, and other contaminants that may impact the safety or efficacy of the product.

To prepare a syringe for filling, the plastic disc and PVC pipe should be cleaned thoroughly with lacquer thinner or acetone to remove any contamination. Then, the disc and PVC pipe should be bonded to each other with thickened epoxy. After the epoxy has cured, the PVC pipe should be placed in a syringe needle, which is then attached to the vacuum mixer.

Drying

Vacuum mixing improves the performance of materials by reducing oxidation and eliminating air bubbles. It also reduces process times and makes it easier to handle heat-sensitive products. This can be useful in the manufacturing of food and pharmaceutical products. In addition, vacuum mixing can help prevent contamination. Vacuum-mixed materials are less likely to absorb bacteria or other contaminants and can maintain their original properties longer.

For bone cement, a vacuum mixer is able to evacuate air from the matrix during the blending process. This helps to produce void-free cast solid surface products, which are popular in today’s kitchen and bath markets. The vacuum mixer also eliminates the need for a second stage of casting, which can reduce the overall time required to complete a project.

A manual squeeze bulb 70, actuated by circuit 32, is mounted on the end of a lateral vacuum tube 72 joining the main vacuum tube 74 extending between the mixer and a vacuum source like source 14. When the operator squeezes the bulb sharply, it generates a positive pressure pulse above ambient that is sensed by the vacuum source to actuate the automatic pump and initiate evacuation. A check valve (not shown) positioned at the end 68 of the squeeze bulb prevents the pressure pulse from dissipating into the interior of mixer 60 and allows air to flow back from the vacuum pump, as needed, for operation of the mixer.