The influence of the diameter and depth of the tablet press on the material

Tablet press is a kind of mechanical equipment that compacts powdered materials into tablets through molds. Its working principle is mainly through the relative movement of the upstroke and downstroke, the material is filled into the mold, and it is compacted into sheets under a certain pressure. As the key parameters of the die, the diameter and depth of the tablet press directly determine the shape, size, weight, hardness and tablet efficiency of the tablet.

 

► Affects the shape and size of the tablet

The diameter of the tablet press directly determines the diameter of the tablet. For the specific material and tablet process, choosing the right tablet diameter can ensure that the tablet shape and size meet the product requirements. If the diameter is too small, it may lead to too small or irregular shape of the tablet, affecting the appearance and use of the product; If the diameter is too large, it may increase production costs and energy consumption, and bring inconvenience to subsequent packaging, transportation and other links.

► Affect the material filling and compaction

The diameter of the tablet press also affects the filling and compaction process of the material. The larger diameter of the tablet press means that the volume of the mold is larger and can accommodate more materials. Under the same pressure, the mold with a larger diameter can better disperse the pressure, so that the material can be more evenly compacted. This is of great significance for increasing the density and hardness of the tablets and improving the solubility.

► Affect production efficiency and capacity

Generally speaking, a larger press diameter means that more material can be pressed at a time, thereby improving production efficiency and capacity. This is particularly important for large-scale production enterprises, which can significantly reduce production costs and improve market competitiveness. However, a large diameter tablet press may also increase the complexity and maintenance costs of the equipment, so the pros and cons need to be weighed when choosing.

 

 

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► It affects the thickness and weight of the tablet

The depth of the tablet press, especially the filling depth (that is, the depth of the punch into the middle die hole), directly determines the thickness and weight of the tablet. The deeper the filling depth, the greater the thickness and weight of the tablet; The shallower the filling depth, the smaller the thickness and weight of the tablet. In the production process, the appropriate filling depth needs to be selected according to the requirements of the product to ensure that the thickness and weight of the tablet meet the standard.

► It affects the compaction degree and hardness of the material

The change of filling depth will also affect the compaction degree and the hardness of the material. The deeper the filling depth, the greater the pressure on the material in the mold, the higher the degree of compaction, and the greater the hardness of the film. This is particularly important for products that require the production of harder tablets. However, too deep filling depth may also lead to problems such as depression or fracture at the bottom of the film, so it needs to be explored and adjusted continuously in practice.

► The appearance quality of the film is affected

Filling depth also affects the appearance quality of the film. If the filling depth is too deep, it may cause the bottom of the film to sag or not smooth enough; If the filling depth is too shallow, it may lead to protrusions or cracks on the surface of the film. Therefore, when adjusting the filling depth, it is necessary to comprehensively consider the appearance quality requirements of the tablet to obtain the best tablet effect.

 

When selecting the diameter and depth of the tablet press, it is necessary to consider a number of factors, including production needs, material properties, equipment costs and maintenance costs. Here are some basic rules to follow:

◆ Select according to production needs First of all, the required tablet diameter and depth need to be determined according to the production scale of the product, the shape and size of the tablet, hardness requirements, etc. For example, for products that require mass production and require high tablet shape and size, a tablet press with a large diameter and adjustable depth can be selected.
	◆ Consider material properties The physical and chemical properties of different materials differ greatly, and there are different requirements for the diameter and depth of the tablet press. For example, some viscous materials may require a shallow filling depth to avoid the occurrence of sticky mold; Some materials with poor fluidity may require a larger diameter to improve tablet efficiency.
◆ Weigh equipment costs against maintenance costs The larger the diameter and depth of the tablet press, usually means the higher the cost of the equipment, while the maintenance cost may also increase accordingly. Therefore, when choosing, it is necessary to weigh the relationship between equipment cost and maintenance cost and production efficiency and quality. For some small scale production or product requirements of the enterprise, the choice of lower cost of the tablet press may be more appropriate.

Take the pharmaceutical industry as an example, suppose that an enterprise needs to produce a tablet with a diameter of 10mm, a thickness of 5mm and a moderate hardness. When choosing a tablet press, the following factors need to be considered:

► The choice of the diameter of the tablet press

According to the diameter requirements of the product, the tablet press with a diameter of 10mm can be selected. However, in order to ensure the manufacturing accuracy and service life of the mold, a slightly larger diameter, such as 10.5mm or 11mm, is usually selected. This ensures that the diameter requirements of the product can still be met when the mold is worn or adjusted.

► The choice of depth of the tablet press

According to the thickness and weight requirements of the product, the appropriate filling depth needs to be selected. In practice, the optimal filling depth can be determined by pressure testing and adjustment. In general, the best parameter setting can be found by gradually increasing the filling depth and observing the quality and hardness of the piece.

► Optimization of laminating process

After selecting the appropriate tablet press diameter and depth, it is also necessary to optimize the tablet press process. For example, you can adjust the pressure, speed and other parameters of the tablet press to obtain the best tablet effect. At the same time, it is also necessary to pay attention to the influence of factors such as material pretreatment and mixing uniformity on the tablet effect.