The use of metal-polymers in the manufacture of mold-forming parts allows for the significant reduction in price and time used in manufacturing of parts. Using data on the thermal conductivity of metal-polymers in calculations of the cooling system of molds allows calculating the optimal cycle of obtaining the product. The authors propose a method of determining the coefficient of heat transfer of metal-polymers based on a die matrix, filled with aluminum. The chosen equipment or measuring tool by them, allows determining the heat transfer coefficient of the material in use. The values of the coefficient of heat transfer of the material in question, obtained in the course of the research can be use in different databases of applications used for modeling production by injection molding. The described method of determining the coefficient of heat transfer may be repeated for samples of metal-polymers.

Abstract-The article describes a technique to calculate the reliability of a fixing element of a metal-polymer insert of a combined mold for casting products from thermoplastics. To do this, the stress-strain state of the metal-polymer fixing element is calculated by the force of ejection. The characteristics of ejection systems intended for removing molded products from a mold are given. The scheme for removing the product from the punch of a metal-metal-polymer mold, as well as the pressure distribution scheme for the metal-polymeric part of the die punch of the shrink-formed product, is shown. An algorithm is given for calculating the ejection force required to remove a mold from a punch. A special case of the ejection force for an "asterisk" product is calculated. The technique for obtaining the initial data for the calculation is described, in particular, the measurement of the change in the geometry of the article, subject to shrinkage of its material, was carried out using CAD simulation. By the example of the metal-polymer forming part of the mold for the star-shaped product, the reliability of the metal-fixing element in the cage was tested using finite element analysis. Calculations of the stress state of the metal-polymer insert for the "star" product are given. The article specifies a particular problem of finding stress concentrators in a metal-polymer insert, which allows designers to decide on the optimal shape and location of the fixing element. Finite element analysis is carried out using a free application FreeCAD, which enables one to accomplish the task. A step-by-step calculation algorithm in FreeCAD is presented with the description of built-in modules used in the calculations. A technique is proposed to calculate the reliability of a fixing element of a metal-polymer part of a mold for any design of a metal-polymer insert, provided that the design model is parameterized.

No abstract

Time decrease in technological pre-production in multiproduct production is possible at the expense of the development of a method which takes into account current information of a production section.