KR200446637Y1 - Core drum preheater - Google Patents

Abstract

The present invention relates to a core drum preheating device that can shorten the vulcanization time by preheating the metal part of the green case using a high frequency in a closed space before vulcanizing the green case made close to the shape of the tire.

The preform chamber 20 is formed in a tire shape and supports the cradle 11 supporting the green case 50, the central shaft portion 12 installed on the base 30, the cradle 11 and the central shaft portion 12. Core drum 10 made of a steel made of a separating plate 13 for partitioning the up and down; A preheating coil 35 installed on an inner circumferential surface of the lower case 31 so as to be spaced apart from the holder 11 of the core drum 10 to preheat the metal part of the green case 50; A lower bead ring 21 installed in the lower case 31 and in contact with the lower bead of the holder 11 to form a lower preheating chamber LH; An upper bead ring 22 installed on the cover plate 32 in contact with the lower case 31 and contacting the upper bead of the cradle 10 to form an upper preheating chamber UH; An up-down cylinder 33 for elevating the cover plate 32; An upper cover 34 installed on the cover plate 32 and being lifted together with the upper bead ring 22 to seal the inside of the preheat chamber 20; A setting cylinder 36 installed on the cover plate 32 for elevating the upper bead ring 22; And a shangdong bearing 37 for guiding the lifting and lowering of the cover plate 32.

Accordingly, the green case is heated at a high frequency in a state where the green case is sealed in the preheating chamber, and the heat loss is reduced, so that the preheating effect is excellent and the energy consumption can be reduced.

Green case, vulcanization, preheating, core drum, bead ring, high frequency heating, fluid

Description

Core drum preheater {Pre-heating Machine for Core Drum}

The present invention provides a core drum preheating device to shorten the vulcanization time by supplying fluid to heat the green case and preheating the metal part of the green case using high frequency before vulcanizing the green case made close to the shape of the tire. It is about.

In general, a tire is a green case in which various tire semi-finished products manufactured in the pre-processing, such as body ply, tread rubber, belt layer, sidewall rubber, bead, inner liner, etc. It is produced by vulcanization. Here, the process of assembling / molding the semi-finished products in a green case is called a molding process. The molding process includes a method of assembling and molding all the semi-finished products simultaneously in one molding drum, and sequentially assembling and molding in several steps. have.

Here, the green case is manufactured in the form of attaching various tire semi-finished products to the forming drum. Subsequently, after the green case is put into the vulcanizing apparatus, the green case is formed into a tire through a vulcanizing process of forming the outer shape of the tire by pressing and providing high temperature steam or the like.

However, the conventional tire vulcanization apparatus has a problem in that the vulcanization time is long because it uses a method of raising the temperature of the green case itself to vulcanize it. In particular, when the tire is vulcanized using the bladder, since the bladder itself is formed of rubber having low thermal conductivity, the vulcanization time becomes longer.

Accordingly, as a method for shortening the vulcanization time of the tire, a method of preheating the green case after manufacturing the green case using the forming drum and before vulcanization has been devised. This method has an advantage that the vulcanization time of the tire can be shortened by induction heating of a metal part of the tire, that is, a bead of the bead or a metal member such as a metal belt embedded in the tire using high frequency.

The above-mentioned high frequency induction heating uses the principle of self-heating due to loss of eddy current or hysteresis loss caused by placing an electrical conductor in a high frequency magnetic field. That is, the green case is preheated by using resistance heat due to eddy current loss and hysteresis loss generated in the metal member of the tire located in the coil in which the alternating current (high frequency) current flows.

However, the green case preheating method using the high frequency has a high energy consumption because it is vulcanized in an open environment when preheating the green case, and the preheating time and tire vulcanization time are increased because the green case is preheated using only high frequency without any other energy source. There is a problem that becomes longer.

The present invention has been made to solve the above-mentioned problems, core preheating device that can reduce the energy consumption by induction heating of the metal part of the green case in a closed environment when preheating the green case using a high frequency The purpose is to provide.

In addition, the present invention preheats the green case by induction heating of the core part where the green case is installed and the metal part of the green case using the high frequency generated by the high frequency oscillator and preheating the inside of the green case using high temperature fluid. It is an object of the present invention to provide a core drum preheating device capable of significantly shortening the time and the vulcanization time.

In addition, the present invention has an object to provide a core drum preheating device that can easily perform the tire preheating operation by supplying the green case automatically when supplied to the preheating chamber to preheat the green case.

Core drum preheating apparatus of the present invention for achieving the above object is formed in the shape of a tire to support the green case, the central shaft portion installed in the base and the cradle and the central shaft portion to connect the preheat chamber up and down A steel core made of a separator plate; A preheating coil installed on an inner circumferential surface of the lower case so as to be spaced apart from the cradle of the core drum to preheat the metal part of the green case; A lower bead ring installed in the lower case and contacting the lower bead of the cradle to form a lower preheating chamber; An upper bead ring installed on a cover plate in contact with the lower case and contacting an upper bead of the cradle to form an upper preheating chamber; An up-down cylinder for elevating the cover plate; An upper cover installed on the cover plate and being lifted together with the upper bead ring to seal the interior of the preheating chamber; A setting cylinder mounted to the cover plate to lift the upper bead ring; And a shangdong bearing for guiding the lifting and lowering of the cover plate.

In addition, the core drum preheating device of the present invention, it is possible to heat the green case itself by using a high-temperature fluid, for this purpose, a heating nozzle for supplying a high-temperature fluid to the upper preheating chamber and the lower preheating chamber each independently And a pair of fluid discharge pipes through which the fluid of the upper preheating chamber and the lower preheating chamber flows out.

In addition, the core drum preheater of the present invention is characterized in that it further comprises a low frequency generator for heating the fluid of the preheating chamber.

In addition, the core drum preheating apparatus of the present invention includes a tire supply unit for supplying the green case to the core drum, wherein the tire supply unit is provided on a seating table on which the green case is seated, and is installed on the seating table. A front and rear movement cylinder for reciprocating the stage to the core drum side, and the LM block is installed on the seat is coupled, characterized in that it comprises a LM guide for guiding the front and rear movement of the seat.

According to the core drum preheating apparatus of the present invention, since the green case is heated at a high frequency while the green case is sealed in the preheating chamber, the preheating effect is excellent and the energy consumption can be reduced.

In addition, according to the core drum preheating apparatus of the present invention, the green case by heating the green case itself by supplying a high temperature fluid into the core drum supporting the green case while induction heating the metal part of the green case using high frequency Since the temperature is increased, the tire vulcanization time can be shortened.

In addition, according to the core drum preheater of the present invention, by heating the fluid continuously using a low frequency to maintain the high temperature state of the fluid has the effect of reducing the tire curing time.

In addition, according to the core drum preheating apparatus of the present invention, when the green case is supplied to the preheating chamber can be automatically supplied using a cylinder, there is an effect that can easily perform the preheating operation of the green case.

Hereinafter, the core drum preheating apparatus of the present invention with reference to the accompanying drawings.

1 is a configuration diagram showing a core drum preheating device according to the present invention, Figure 2 is a side view of the core drum preheating device of the present invention, Figure 3 is a detailed view showing the upper cover portion of the main configuration of the present invention 4 is a plan view of the core drum preheater of the present invention.

Core drum preheating apparatus according to the present invention is formed in the shape of a tire for supporting the green case 50, the holder 11, the central shaft portion 12 provided in the base 30, the holder 11 and the central shaft portion A core drum (Core Drum, 10) made of steel made of a separating plate 13 which connects the 12 and partitions the preheating chamber 20 up and down; A preheating coil 35 installed on an inner circumferential surface of the lower case 31 so as to be spaced apart from the holder 11 of the core drum 10 to preheat the metal part of the green case 50; A lower bead ring (21) installed in the lower case (31) to be in contact with the lower bead of the holder (11) to form a lower heating room (LH); The upper bead ring 22 which is installed to be elevated on the cover plate 32 in contact with the lower case 31 and contacts the upper bead of the cradle 11 to form an upper heating room (UH) 22. )and; An up-down cylinder 33 for elevating the cover plate 32; An upper cover (34) installed on the cover plate (32) and being lifted together with the upper bead ring (22) to seal the inside of the preheat chamber (20); A setting cylinder (35) installed on the cover plate (32) to lift and lower the upper bead ring (22); A shangdong bearing 37 for guiding the lifting and lowering of the cover plate 32; As long as the heating nozzle 23 for supplying a high temperature fluid to the upper preheating chamber UH and the lower preheating chamber LH independently and the fluids of the upper preheating chamber UH and the lower preheating chamber LH are released. A pair of fluid discharge pipes 24; It is configured to include a tire supply unit 40 for supplying the green case 50 to the core drum (10).

Here, the tire supply part 40 is installed on the seating stage 41 on which the green case 50 is seated, and the seating stage 41, and reciprocally moves the seating stage 41 toward the core drum 10. LM guide (Linear Motion Guide, 44) is coupled to the front and rear movement cylinder 42 and the LM block (Linear Motion Block, 43) installed in the seating 41 to guide the forward and backward movement of the seating 41 It is made, including. In addition, a high frequency oscillator (not shown) for applying a high frequency to the preheating coil 35 may be installed. In some cases, a low frequency generator (not shown) may be provided to heat the fluid to maintain the fluid at a high temperature or higher. It may be installed further.

The core drum preheating device of the present invention configured as described above preheats the green case in an enclosed space to shorten the preheating time and reduce energy consumption.

As the up-down cylinder 33 is operated, the cover plate 32 is raised under the guidance of the shandong copper bearing 37 to be in a setting standby state. In this state, the front and rear movement cylinder 42 of the tire supply unit 40 is operated to move the seating table 41 on which the green case 50 is seated toward the preheating chamber 20. In this case, the seating plate 41 is linearly moved in the horizontal direction by the LM guide 44 and the LM block 43.

Thereafter, the green case 50 is mounted on the holder 11 of the core drum 10, and the seating plate 41 is returned to the initial position by the front and rear moving cylinder 42. At this time, since the lower bead portion of the cradle 11 is installed to be in contact with the lower bead ring 21 installed in the lower case 61, the lower preheating chamber (LH) is formed in the lower portion of the separating plate (13). In addition, the cover plate 32 is lowered by the up-down cylinder 33, and the setting cylinder 36 is operated to allow the upper bead ring 22 to contact the upper bead of the cradle 11. The position of the bead ring 22 and the top cover is set. Therefore, an upper preheating chamber UH sealed in the upper part of the separator 13 is formed. That is, the preheating chamber 20 is sealed by the holder 11, the upper and lower bead rings 21 and 22, and the upper cover 34.

Thereafter, a high frequency is applied to the preheating coil 35 by a high frequency oscillator, and electromagnetic induction occurs between the preheating coil 35 and the steel core drum 10 to generate heat in the core drum 10. do. At the same time, heating heat by electromagnetic induction is generated in metal parts such as beads and steel belts of the green case 50.

As described above, the preheating chamber 20 formed by the core drum 10, the lower bead ring 21, the upper bead ring 22, and the upper cover 34 is sealed in the green case 50. Since the inner circumferential surface and the metal part of the green case 50 are preheated at the same time, the preheating time can be shortened and energy consumption required for preheating can be reduced.

On the other hand, by supplying a high-temperature fluid to the upper preheating chamber (UH) and the lower preheating chamber (LH) independently through the heating nozzle 23, the green case 50 mounted on the holder 11 by the high temperature fluid. ) Can be preheated faster. At this time, the front end of the heating nozzle 23 is to face the inner surface of the cradle 11, the hot fluid impinges on the cradle 11 and the green case 50 mounted on the cradle 11 Preheated. Subsequently, the fluid circulated in the holder 11 is discharged to the outside through the fluid discharge pipe 24, and the upper preheating chamber UH and the lower preheating chamber (by applying a low frequency to the fluid through the low frequency generator) The fluid inside the LH) may be maintained above a certain temperature. Here, since the preheating chamber 20 is sealed by the holder 11, the upper and lower bead rings 21 and 22, and the upper cover 34, the fluid inside the preheating chamber 20 is heated during heating. Leaking out is prevented.

As described above, the metal part and the core drum 10 of the green case 50 are heated at high frequency outside of the green case 50 using a high temperature fluid inside the green case 50. Since the green case 50 is heated, it is possible to preheat the green case 50 at a high speed.

In the above description of the preferred embodiment of the present invention, the scope of the present invention is not limited only to this specific embodiment, those skilled in the art within the scope of the utility model registration claims of the present invention Changes may be made as appropriate.

1 is a configuration diagram showing a core drum preheating apparatus according to the present invention.

Figure 2 is a side view of the core drum preheater of the present invention.

Figure 3 is a detailed view showing the upper cover portion that is the main component of the present invention.

Figure 4 is a plan view of the core drum preheating device of the present invention.

<Description of the symbols for the main parts of the drawings>

10: Coredrum 11: Cradle

12: central shaft portion 13: separator

20: Preheating chamber LH: Lower preheating chamber

UH: Upper preheat chamber 21: Lower bead ring

22: upper bead ring 23: heating nozzle

24: fluid discharge pipe

30: base 31: lower case

32: cover plate 33: up-down cylinder

34: upper cover 35: preheating coil

36: setting cylinder 37: Shanghaidong bearing

40: tire supply part 41: seating table

42: forward and backward cylinder 43: LM block

44: LM Guide

50: painted case

Claims (4)

It is formed in the shape of a tire to support the cradle 11, the green case 50, the central shaft portion 12 installed on the base 30, the cradle 11 and the central shaft portion 12 is connected to the preheating chamber 20 Core drum 10 made of a steel made of a separating plate 13 for dividing the up and down; A preheating coil 35 installed on an inner circumferential surface of the lower case 31 so as to be spaced apart from the holder 11 of the core drum 10 to preheat the metal part of the green case 50; A lower bead ring (21) installed in the lower case (31) and contacting the lower bead of the holder (11) to form a lower preheating chamber (LH); An upper bead ring 22 mounted on the cover plate 32 in contact with the lower case 31 and contacting the upper bead of the cradle 11 to form an upper preheating chamber UH; An up-down cylinder 33 for elevating the cover plate 32; An upper cover (34) installed on the cover plate (32) and being lifted together with the upper bead ring (22) to seal the inside of the preheat chamber (20); A setting cylinder (36) installed on the cover plate (32) to lift the upper bead ring (22); Core drum preheating apparatus comprising a; Shanghai copper bearing (37) for guiding the lifting of the cover plate (32). The method of claim 1, The core drum preheating device to heat the green case 50 itself by using a high temperature fluid, A heating nozzle 23 for supplying a high temperature fluid to the upper preheating chamber UH and the lower preheating chamber LH independently of each other, and the fluid of the upper preheating chamber UH and the lower preheating chamber LH exits. Core drum preheating device characterized in that it comprises a pair of fluid discharge pipe (24). The method of claim 2, Core drum preheater further comprises a low frequency generator for heating the fluid in the preheat chamber (20). The method according to any one of claims 1 to 3, It is provided with a tire supply unit 40 for supplying the green case 50 to the core drum 10, The tire supply unit 40 is installed on the seating table 41 on which the green case 50 is seated, and the seating table 41 to reciprocate the seating table 41 toward the core drum 10. Core drum, characterized in that it comprises a LM guide (44) for guiding the front and rear movement of the seating table 41 is coupled to the front and rear cylinder (42), the LM block 43 installed on the seating table 41 Preheater.

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