RU78728U1 - DEVICE FOR MANUFACTURING MULTI-CIRCUIT CLOSED LONG-DIMENSIONAL AERODYNAMIC PROFILE - Google Patents

Abstract

1. A device for the manufacture of a multi-loop closed long-length aerodynamic profile, comprising a detachable shape including an upper part and a lower part, a fitting for supplying a binder, fastening elements, characterized in that it is provided with a number of mandrels made in the form of longitudinal rods fixed with pins in shape and oriented along the span of the aerodynamic profile, while the outer surface of the mandrels is made parallel to the surface of the aerodynamic profile and lagging behind it for a given elichinu determined desired plating thickness, and the gaps between the mandrel are made of predetermined thicknesses stenok.2 conditions. A device for manufacturing a multi-loop closed long-length aerodynamic profile according to claim 1, characterized in that it is equipped with dividers installed at the end walls of the mold, made in the form of steel plates with slots for arranging the mandrel pins at a given distance, while in one of the dividers a channel is made for supply and uniform distribution of the binder, communicating with the fittings.

Description

The field of technology.

The utility model relates to technological processes, namely to the molding of plastics and can be used for the manufacture of structures from polymer composite materials and can be used in aircraft, space technology, shipbuilding and automotive in the manufacture of long multi-circuit parts, in particular the aerodynamic surfaces of aircraft, to reduce their mass and quality improvement.

The level of technology.

A device is known for manufacturing an open profile shown in Fig. 43 p. 40 of the journal Composites technologies at NLR 1994-2004 2005, consisting of two half-forms with flanges that create a closed airtight volume into which the filler is placed, followed by injection of the binder into the cavity in the amount necessary to impregnate the filler. Injection is performed under pressure with the possibility of displacing air and excess binder using a vacuum trap located at the exit from the closed form.

The disadvantage of this device is the presence of internal

sealed volume, which is completely filled with filler and forms only the contour of the part. Using such a device, it is impossible to obtain a thin-walled profile with internal stiffeners, since there are no cavities inside the form for forming walls.

The closest to the proposed utility model in terms of technical nature and the achieved result is a device for manufacturing a closed-shape part shown in Fig. 38 p. 36 of the 2005 Composites technologies at NLR 1994-2004 journal, which consists in placing it in the mold cavity a mandrel that leaves free space around the perimeter of the mold for filling with filler.

The disadvantage of this device is the presence of an unfixed mandrel relative to the walls of the mold. In a single-channel product, when injection molding, the displacement of the unfixed mandrel relative to the walls of the mold is minimal, while in a multi-channel product this displacement increases by the number of mandrels and can lead to a gap on one side of the mold.

The essence of the utility model.

The objective of this utility model is to create such a device for the manufacture of long parts, which would make it possible to produce aerodynamic surfaces of more than 1000 mm, a closed multi-contour profile of composite materials.

The problem is solved due to the fact that the device for the manufacture of multi-loop closed

long aerodynamic profile containing a detachable shape, including the upper part and the lower part, fittings for supplying a binder, fasteners, equipped with a number of mandrels made in the form of longitudinal rods, fixed with pins in the form, and oriented along the span of the aerodynamic profile, while the outer the surface of the mandrels is made parallel to the surface of the aerodynamic profile, and behind it by a predetermined value determined by the required thickness of the skin, and the gaps between the mandrels are made the condition given wall thickness.

Moreover, the device is equipped with dividers installed at the end walls of the mold, made in the form of steel plates, with slots for arranging the mandrel pins at a predetermined distance, while in one of the dividers a channel is made for feeding and even distribution of the binder, communicating with the fittings.

This embodiment of the device allows the manufacture of multi-contour closed profiles of composite materials.

The list of figures in the drawings.

The utility model is illustrated by drawings, in which:

The figure 1 shows a General view of a device for the manufacture of multi-loop closed long-length aerodynamic profile.

The figure 2 shows a device for the manufacture of a multi-loop closed long-length aerodynamic profile (plan view).

The figure 3 shows a section aa of figure 1.

The figure 4 shows a section bB of figure 1.

Implementation of a utility model.

The utility model is a closed demountable form, consisting (see Fig. 1 ... 4) of the side walls 1 and 2, the lower part 3 and the upper part 4, end walls 5 and 6, mandrels 7, 8, 9, 10 with pins 11, dividers 12, 13 with a channel for injecting a binder, a seal 15, 16, 17, 18, 19, 20, guide pins 21, 22, 23, 24, as well as including a nozzle for injecting a binder and mounting elements in the form bolted connections 25.

Side walls 1, 2 - milled steel parts with stiffeners on the outside.

The lower 3 and upper 4 parts are a solid steel plate with milled longitudinal and transverse stiffeners from the outside. The inner surface of the bottom and the cover are made in such a way that determine the aerodynamic profile of the product.

The end walls 5, 6 are made in the form of a steel plate.

The mold is equipped with a number of mandrels. The mandrels 7, 8, 9, 10 are made of D16T material in the form of longitudinal rods oriented along the span of the aerodynamic profile, the outer surface of which is parallel to the aerodynamic surface, and lagging behind it by a predetermined value determined by the required skin thickness. The gaps between the mandrels are made from the condition of the given wall thicknesses. The mandrels can also be locked with pins in the mold.

Dividers 12, 13 are designed to summarize

the flow of the binder impregnating the preform to its end. The dividers can be used to fix the mandrels relative to the cavity of the snap in order to prevent their displacement inside the mold during the supply of a binder under pressure into the mold. The divider is made in the form of two plates installed inside the mold from the side of the end walls, on each of which there are cutouts in the form of grooves for placing pins 11 for fixing the mandrels, and also in one of the dividers there is a binder injection channel communicated with the fittings.

The channel is laid in the divider 13 for the movement of the flow of the binder from the impregnating installation to the preform.

Sealant 15, 16, 17, 18, 19, 20 - silicone.

Guide pins 21, 22, 23, 24 are designed to position the bottom 3 and cover 4 relative to the side walls 1, 2.

The side walls, the bottom, the cover and the end walls are initially fixed relative to each other by hermetically guiding pins, and then secured with bolts 25.

Description of the utility model.

A part of the mold is assembled from the wall 1 and the lower part 3, forming an angle into which the mandrels 7, 8, 9, 10 are placed, with a preform layer laid on their surface. A preform-filler having the form of a part formed after the filler is impregnated with a binder and exposed to the polymerization conditions, temperature, pressure, time.

The mandrels are laid with pins 11 on the dividers 12, 13. A wall 2 is installed on the lower part 3, then the upper part 4 is laid on the walls 1 and 2. The form is closed by the end walls 5 and 6, and the whole form is hermetically fixed with bolts.

The mold is mounted vertically on the end from the supply side of the binder, in order to combine the flow direction of the binder and air flows displaced from the form by the binder. Through the channel, the binder is fed to the end of the preform.

The process of impregnation of the preform ends when air flow ceases through a transparent pipe placed in the upper end of the mold. The cessation of air exit is determined by the absence of air bubbles in the binder, displaced from the mold through a transparent pipeline. After that, all channels are locked, equipment is placed in a heat chamber, heat treatment is carried out according to the necessary temperature conditions.

At the end of the heat treatment, the equipment is disassembled and the finished product is taken.

Using the proposed utility model will make it possible to produce a long profile from PCM having multi-contour walls.

The technical and economic effect is to increase the range of PCM parts manufactured by pressure impregnation, which reduces the complexity of manufacturing parts of complex shape by shortening the cycle.

Claims (2)

1. A device for the manufacture of a multi-loop closed long-length aerodynamic profile, comprising a detachable shape including an upper part and a lower part, a fitting for supplying a binder, fastening elements, characterized in that it is provided with a number of mandrels made in the form of longitudinal rods fixed with pins in shape and oriented along the span of the aerodynamic profile, while the outer surface of the mandrels is made parallel to the surface of the aerodynamic profile and lagging behind it for a given elichinu determined desired plating thickness, and the gaps between the mandrel is made of the conditions given wall thickness. 2. A device for manufacturing a multi-loop closed long-length aerodynamic profile according to claim 1, characterized in that it is equipped with dividers mounted at the end walls of the mold, made in the form of steel plates with slots for arranging the mandrel pins at a given distance, while in one of the dividers a channel is made for the supply and uniform distribution of the binder, communicating with the fittings.