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.

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Additive manufacturing of metal parts occupies an increasing number of areas of mechanical engineering, but still remains too expensive for mass use. Based on the experience in the production of combined metal-metal polymer forming parts of molds, a new method for the production of composite parts from a metal shell filled with metal polymer is proposed. The strength calculations by the finite element method of the exoskeleton part and a sample of simplified geometry are given as the basis of the study. A comparison of the strength characteristics of parts made of various materials and their combinations showed high strength characteristics of a composite part made of a metal shell and a metal polymer filler. The metal-metal polymer composite part is distinguished not only by its high strength, but also by a significantly lower cost due to the reduction in the volume of 3D printing with metal. The article substantiates the main problems facing researchers and technologists in the development of a practically applicable technology for producing such composite parts.

Nowadays there are various manufacture methods of pipe taps. One of the most laborious operations during manufacture is a marking of pipe taps for subsequent machining. Work layout operations are performed using special tool ware and outfit. These operations are performed manually and it leads to the decrease in accuracy and to the increase of laboriousness. The authors suggest the method of determination of the latent base of pipe tap (average plane) using an anthropomorphic robot. The results of research would help to make the virtual calculation of tool position of the anthropomorphic robot for marking and to generate the robot trajectory. Ultimately, such research would also decrease laboriousness and increase accuracy of marking operation. Materials and methods. The authors supposed to use latent base, namely the average plane of the pipe tap as a measuring base. The robot is calibrated from the base plane placement and chooses the shortest circular arc by comparative approach. Therefore, such shortest arc would form the average plane. The authors carry out the determination of the curve line length by the triangulation method using the interferometer. Results. The result of the research is the technology development for determination of latent base in the average plane form. Discussion and conclusion. The proposed method of latent bases determination of pipe tap would allow making the automated system of marking of pipe taps. Moreover, such method would help to reduce time of performing operations as well as to decrease the manufacture laboriousness on the following stage of technological process.