ES2724924B1 - INTERNAL THREAD HEATING APPARATUS WITH THERMOCOPY FOR THREADED BARS - Google Patents

Description

DESCRIPTION

INTERNAL THREAD HEATING APPLIANCE WITH THERMOCOPY FOR

THREADED BARS

TECHNICAL SECTOR

The object of the invention is framed within the devices for heating, being a minor good of molds, metal parts or machinery.

BACKGROUND OF THE INVENTION

Within the existing technique for heating threaded bars (5) shown in figure 1, a metal mold (1) is made to which a threaded hole (2) is drilled, another hole is made and a cartridge resistance ( 3) As a heat source, a 3rd hole is drilled where the temperature probe (4) is inserted, to finish the threaded bar (5) with an internal through hole to be heated is inserted into the threaded hole (2) and energized the cartridge heater (3), transmitting heat (6) through the metal mold (1) from the cartridge heater (3) until it reaches the threaded bar (5), receiving the heat first from one side (7) and not around the perimeter of the threaded bar (5), which causes the solid plastic material (11) to melt first on the one hand, producing delays and extrusion failures, it is a more bulky construction method, the temperature probe (4) is further from the threaded rod (5), which leads to a delay in time at sea temperature and does not have the temperature accuracy as it is further from the flux outlet (10).

Another way of heating is with Nozzle Resistors fixed with tortillería, which does not allow 100% contact with the threaded bar, as it does not touch the grooves of the threaded bar in its entirety.

Another means of heating is with a gas torch directly to the bolt, where there is no temperature control or precision by induction, where the apparatus is too bulky to install.

EXPLANATION OF THE INVENTION

The object to which the object of the invention to be patented refers is defined by the following description, which is not intended to limit its scope.

In the heating apparatus of the existing technique shown in figure 1, the most obvious problems are the lack of temperature control, when normally solid plastic material (11) is introduced through the through hole of the threaded bar (5) and by means of energizing the cartridge resistance (3) that emits temperature to transform it into liquid (8), the heat emitted by the cartridge resistance (3) first melts the plastic that circulates inside the threaded bar (5) closest to the cartridge resistance (3), taking longer to heat the entire threaded bar (5) equally. By constructing heated molds containing threaded holes plus temperature sensors and a housing for the cartridge electrical resistance the resulting object is obviously larger and less accurate. In the solution of the present invention, as seen in Figures 2 and 3, it is proposed to build a heating device with a heating resistance (12) and thermocouple incorporated (13) in a socket (15) made with filler material. (metallic or refractory paste) forming a set with a certain through thread inside fully adjustable to the thread of the threaded bar (17). The advantages are:

1 ° Allow the heating resistance (12) to be installed as close to the threaded bar (17), achieving a uniform temperature throughout the perimeter (20) and allowing that if solid plastic is introduced, all of this is transformed into liquid plastic (21 ) at the same time

2 ° Considerable reduction in the volume of current heating systems.

3 ° Precise fit between the threaded bar (17) and the heating device offering excellent heat transfer (22).

4th Lack of additional fastening systems.

5 ° More precise temperature regulation by placing the probe or thermocopy (13) as close as possible to the thread of the threaded rod (17).

6 ° Absence of visible connections, avoiding short circuits and breaks.

7 ° Waterproof, protected from excess circulating material, shocks, vibrations.

8 ° Cleaning with any method (wet, blowing, scraping).

BRIEF DESCRIPTION OF THE DRAWINGS

To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, a set of drawings is attached as an integral part of said description, in which, with an illustrative and non-limiting nature, the following has been represented following:

Figure.1.- Shows a sectioned front view of the current state of the art.

Figure.2.- Shows a front sectional view of the internal thread heating device with thermocopy.

Figure.3.- Shows a sectional top view of the internal thread heating device with thermocopy.

Figure.4.- Front sample of the internal thread heating device with thermocopy.

Figure.5§- Shows view of cartridge resistance with built-in probe.

Figure.5b- Shows a view of the heating wire resistance in a worm shape.

Figure.5c- Shows a view of PTC thermistors printed resistance.

Figure.5d- Shows a view of the sheet metal clamp resistance.

Figure.6- Shows metallic support view.

Figure.7- Shows a sectional view of the metal support with a hole.

Figure.8- Shows a sectional view of the metallic support with threading.

Figure.9- Shows a metallic support view with threading and finishing.

Figure.10- Shows view of the rolled support a resistance with thermocouple. Figure.11- Shows a view of the metal support filled with flux or refractory paste.

Figure 12- Shows a front sectional view of the internal thread heating device with thermocopy with threaded bar.

Claims (3)

1 ° Heating device for internal threads with thermocopy to heat threaded bars (17) with a through hole inside in order to melt plastic, it is formed by a set of the following elements, electric heating resistance (12), thermocopy (13 ) and metal cap (15) with an internal thread, all joined together and electrified by an electrical cable for connection to the electrical network, characterized by having inside the metal support (15) the same thread and internal pitch as the thread outside of the threaded bar (17) to be heated. 2 ° Internal thread heating apparatus with thermocopy to heat threaded bars (17) with a through hole inside, according to claim 1, whose electric heating resistance (12) surrounds the entire outer perimeter of the threaded bar (17) and is configured to emit heat and by conduction increase the temperature of the threaded bar (17) around its perimeter (22) at the same time. 3rd Internal thread heating apparatus with thermocopy to heat threaded bars (17) with a through hole inside, according to claim 1, in which the thermocopy (13) is arranged between the electric heating resistance (12) and the thread of the threaded rod (17).