Cooling mechanism for an extrusion die for aluminium profiles

Abstract

The application relates to an aluminum profile extrusion forming die cooling mechanism, which comprises a front die and a rear die, the rear die comprises an inner module, an outer module and a spacer block, a welding chamber and a working belt are arranged on the inner module, a water cooling mechanism is connected to the inner module, the water cooling mechanism comprises a first cooling channel, the first cooling channel is arranged at the rear side of the welding chamber and annularly arranged outside the working belt, the spacer block is connected with an air cooling mechanism, the air cooling mechanism comprises a second cooling channel, and the air cooling mechanism forms an air temperature insulation layer in the spacer block through the second cooling channel. The rear die is divided into three parts, the inner module is cooled by the water cooling mechanism, the cooling efficiency is improved, meanwhile, the air cooling mechanism forms an air temperature insulation layer in the spacer block through the second cooling channel, heat of the inner module is prevented from being transmitted to the outer module, the overall cooling efficiency of the rear die is improved, and cracks of the rear die due to uneven cooling are prevented.

Description

Technical Field

[0001] This invention relates to the field of aluminum profile processing equipment technology, and in particular to a cooling mechanism for aluminum profile extrusion molding die. Background Technology

[0002] In the aluminum profile extrusion process, temperature control of the die and the metal inside the die is the key to extrusion production. However, the means to adjust this temperature are limited. At present, the temperature of the die and the metal inside the die can only be ensured to be within the normal range by adjusting the preheating temperature of the extrusion cylinder, the extrusion billet, the extrusion die, the appropriate production cycle, and the extrusion speed.

[0003] In actual production, because the metal temperature is highest near the die exit working zone, measures such as reducing the extrusion speed and lowering the initial temperature of the billet must be taken. Therefore, one existing solution is to control the metal exit temperature to prevent it from becoming too high, control the extrusion speed to prevent it from becoming too fast, and simultaneously reduce the initial temperature of the billet. However, if the metal temperature at the die exit is still too high, operators can only reduce its temperature by using water cooling, air blowing cooling, or liquid nitrogen cooling at the external exit of the die.

[0004] Chinese invention patent with authorization announcement number CN108480413A discloses a cooling mechanism for aluminum profile extrusion molding die, which uses cooling water and room temperature nitrogen to replace liquid nitrogen for die cooling. However, this cooling method causes a nitrogen layer to form between the extrusion cavity and the inner wall of the die pad, which hinders heat transfer and reduces cooling efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a cooling mechanism for aluminum profile extrusion molding dies to solve the problems mentioned in the background art.

[0006] The above-mentioned objective of the present invention is achieved through the following technical solution: a cooling mechanism for an aluminum profile extrusion molding die, comprising a front die and a rear die, wherein the front die is provided with a die core and a flow divider hole, and the rear die includes an inner module, an outer module disposed outside the inner module, and a spacer block disposed between the inner module and the outer module. The inner module is provided with a welding chamber and a working belt, and the inner module is connected to a water cooling mechanism. The water cooling mechanism includes a first cooling channel disposed behind the welding chamber and surrounding the outside of the working belt. The spacer block is connected to an air cooling mechanism, and the air cooling mechanism includes a second cooling channel, wherein the air cooling mechanism forms an air insulation layer within the spacer block through the second cooling channel.

[0007] Preferably, at least two first cooling channels are provided, which are distributed at intervals.

[0008] Preferably, the water cooling mechanism further includes an upper connecting channel and a lower connecting channel. The upper connecting channel is located above the working belt and connects between the two first cooling channels. The end of the upper connecting channel is provided with a water outlet. The lower connecting channel is located below the working belt and connects between the two first cooling channels. The end of the lower connecting channel is provided with a water inlet.

[0009] Preferably, a buffer cavity is provided at the upper end of the first cooling channel, and the upper connecting channel connects the front and rear buffer cavities.

[0010] Preferably, the first cooling channel has a rectangular cross-sectional shape, and the height of the first cooling channel gradually increases from below the working belt upwards. The height of the first cooling channel located below the working belt is less than its width.

[0011] Preferably, the spacer is an annular sleeve fitted onto the outside of the inner module, and the second cooling channel is an annular groove concentric with the spacer.

[0012] Preferably, the spacer block is provided with honeycomb holes, which are radially extended from the second cooling channel to the inner sidewall of the spacer block.

[0013] Preferably, an air guide groove is provided on the outer wall of the inner module, the air guide groove extends through to the rear end face of the inner module in the front-back direction, and the air guide groove is connected to the honeycomb hole at the corresponding position.

[0014] Preferably, the air-cooling mechanism further includes an air inlet pipe and an air outlet pipe, the air inlet pipe being connected to the lower end of the second cooling channel, the air outlet pipe being connected to the upper end of the second cooling channel, and a pressure control valve being provided on the air outlet pipe.

[0015] The beneficial effects of this invention are: This invention divides the rear mold into three parts. The inner module is cooled by a water-cooling mechanism to improve cooling efficiency. At the same time, the air-cooling mechanism forms an air insulation layer in the spacer block through the second cooling channel to prevent the heat of the inner module from being transferred to the outer module. This not only improves the overall cooling efficiency of the rear mold, but also prevents cracks from forming in the rear mold due to uneven cooling. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is an exploded view of the rear mold in an embodiment of the present invention; Figure 3 This is a cross-sectional view of the rear mold in an embodiment of the present invention; In the diagram: 1-Front mold, 101-Diverter hole, 102-Mold core, 2-Rear mold, 201-Inner module, 2011-Welding chamber, 2012-Working belt, 2013-First cooling channel, 2014-Buffer cavity, 2015-Upper connecting channel, 2016-Lower connecting channel, 2017-Water inlet, 2018-Water outlet, 2019-Air guide slot, 202-Outer module, 203-Spacer block, 2031-Second cooling channel, 2032-Honeycomb hole, 2033-Air inlet pipe, 2034-Air outlet pipe, 2035-Pressure control valve. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings.

[0018] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0019] Example: Figure 1-3 As shown, a cooling mechanism for an aluminum profile extrusion molding die includes a front die 1 and a rear die 2. The front die 1 is provided with a die core 102 and a flow divider hole 101. The rear die 2 is provided with a welding chamber 2011 and a working belt 2012. The welding chamber 2011 is connected to the flow divider hole 101, and the die core 102 is located at the center of the welding chamber 2011.

[0020] like Figure 2 and Figure 3 As shown, the rear mold 2 includes an inner module 201, an outer module 202 disposed outside the inner module 201, and a spacer block 203 disposed between the inner module 201 and the outer module 202. The welding chamber 2011 and the working belt 2012 are located on the inner module 201.

[0021] The inner module 201 is connected to a water cooling mechanism, which includes a first cooling channel 2013. The first cooling channel 2013 is located on the rear side of the welding chamber 2011 and is arranged around the outside of the working belt 2012.

[0022] At least two first cooling channels 2013 are provided, which are distributed at intervals. In this embodiment, there are two first cooling channels 2013.

[0023] The water cooling mechanism also includes an upper connecting channel 2015 and a lower connecting channel 2016. The upper connecting channel 2015 is located above the working belt 2012 and connects between the two first cooling channels 2013. The end of the upper connecting channel 2015 is provided with a water outlet 2018 for discharging the cooling water from the first cooling channels 2013.

[0024] The lower connecting channel 2016 is located below the working belt 2012 and connects between the two first cooling channels 2013. The end of the lower connecting channel 2016 is provided with a water inlet 2017 for introducing cooling water into the first cooling channel 2013.

[0025] The upper end of the first cooling channel 2013 is provided with a buffer cavity 2014, and the upper connecting channel 2015 connects the front and rear buffer cavities 2014. The width of the buffer cavity 2014 is greater than the width of the first cooling channel 2013.

[0026] The first cooling channel 2013 has a rectangular cross-sectional shape. The height of the first cooling channel 2013 gradually increases from the bottom of the working belt 2012 upwards. The height of the first cooling channel 2013 located below the working belt 2012 is less than its width. This allows the cooling water in the first cooling channel 2013 at the bottom of the working belt 2012 to quickly absorb the heat of the inner module 201 and heat up rapidly. The first cooling channel 2013 located at the top of the working belt 2012 has a larger volume and holds more cooling water, so the water temperature rises relatively slowly. This allows the cooling water in the upper and lower parts to form a certain convection. The cooling water at the bottom that heats up faster rises into the buffer chamber 2014 and is discharged through the upper connecting channel 2015. The lower connecting channel 2016 replenishes the cooling water with a lower temperature, thus ensuring that the water temperature in the first cooling channel 2013 is always at a low level, thereby better cooling the inner module 201.

[0027] The spacer block 203 is an annular sleeve, which is fitted onto the outside of the inner module 201. The spacer block 203 is connected to a cooling mechanism, which includes a second cooling channel 2031, which is an annular groove concentric with the spacer block 203.

[0028] The air-cooling mechanism also includes an air inlet duct 2033 and an air outlet duct 2034. The air inlet duct 2033 is connected to the lower end of the second cooling channel 2031, and the air outlet duct 2034 is connected to the upper end of the second cooling channel 2031. Air is introduced into the second cooling channel 2031 through the air inlet duct 2033 and discharged through the air outlet duct 2034, so that the second cooling channel 2031 always has air at a low temperature. This allows the second cooling channel 2031 to form an air insulation layer within the spacer block 203, reducing the heat transferred from the inner module 201 to the outer module 202.

[0029] The spacer block 203 is provided with honeycomb holes 2032, which are radially extended from the second cooling channel 2031 to the inner sidewall of the spacer block 203. When air enters the second cooling channel 2031, it enters the gap between the inner surface of the spacer block 203 and the outer surface of the inner module 201 through the honeycomb holes 2032, forming an air layer, which further plays a role in heat insulation.

[0030] An air guide slot 2019 is provided on the outer wall of the inner module 201, extending through to the rear end face of the inner module 201 in the front-to-back direction. The air guide slot 2019 communicates with the corresponding honeycomb holes 2032. A portion of the air entering the gap between the inner surface of the spacer block 203 and the outer surface of the inner module 201 is discharged through the air guide slot 2019, carrying away heat from the outer surface of the inner module 201. A pressure control valve 2035 is provided on the air outlet duct 2034 to control the pressure within the second cooling channel 2031, ensuring that a certain amount of air is always maintained in the second cooling channel 2031 and the gap between the inner surface of the spacer block 203 and the outer surface of the inner module 201.

Claims

1. A cooling mechanism for an aluminum profile extrusion molding die, comprising a front die (1) and a rear die (2), wherein the front die (1) is provided with a die core (102) and a flow divider (101), characterized in that, The rear mold (2) includes an inner module (201), an outer module (202) disposed outside the inner module (201), and a spacer block (203) disposed between the inner module (201) and the outer module (202). The inner module (201) is provided with a welding chamber (2011) and a working belt (2012). The inner module (201) is connected to a water cooling mechanism. The water cooling mechanism includes a first cooling channel (2013). The first cooling channel (2013) is disposed on the rear side of the welding chamber (2011) and is arranged around the outside of the working belt (2012). The spacer block (203) is connected to an air cooling mechanism. The air cooling mechanism includes a second cooling channel (2031). The air cooling mechanism forms an air insulation layer in the spacer block (203) through the second cooling channel (2031).

2. The cooling mechanism for an aluminum profile extrusion die according to claim 1, characterized in that: The first cooling channel (2013) has at least two channels, which are distributed at intervals.

3. The cooling mechanism for an aluminum profile extrusion die according to claim 2, characterized in that: The water cooling mechanism further includes an upper connecting channel (2015) and a lower connecting channel (2016). The upper connecting channel (2015) is located above the working belt (2012) and connected between the two first cooling channels (2013). The upper connecting channel (2015) has an outlet (2018) at its end. The lower connecting channel (2016) is located below the working belt (2012) and connected between the two first cooling channels (2013). The lower connecting channel (2016) has an inlet (2017) at its end.

4. The cooling mechanism for an aluminum profile extrusion die according to claim 3, characterized in that: The upper end of the first cooling channel (2013) is provided with a buffer cavity (2014), and the upper connecting channel (2015) connects the two buffer cavities (2014) in the front and rear.

5. A cooling mechanism for an aluminum profile extrusion die according to claim 3 or 4, characterized in that: The first cooling channel (2013) has a rectangular cross-sectional shape. The height of the first cooling channel (2013) gradually increases from below the working belt (2012) upwards. The height of the first cooling channel (2013) located below the working belt (2012) is less than its width.

6. The cooling mechanism for an aluminum profile extrusion die according to claim 1, characterized in that: The spacer block (203) is an annular sleeve, and the spacer block (203) is fitted on the outside of the inner module (201). The second cooling channel (2031) is an annular groove concentric with the spacer block (203).

7. The cooling mechanism for an aluminum profile extrusion die according to claim 6, characterized in that: The spacer block (203) is provided with honeycomb holes (2032), which are radially extended from the second cooling channel (2031) to the inner wall of the spacer block (203).

8. The cooling mechanism for an aluminum profile extrusion die according to claim 7, characterized in that: An air guide groove (2019) is provided on the outer wall of the inner module (201). The air guide groove (2019) extends through the rear end face of the inner module (201) in the front-back direction. The air guide groove (2019) is connected to the honeycomb hole (2032) at the corresponding position.

9. The cooling mechanism for an aluminum profile extrusion die according to claim 7, characterized in that: The air-cooling mechanism also includes an air inlet pipe (2033) and an air outlet pipe (2034). The air inlet pipe (2033) is connected to the lower end of the second cooling channel (2031), and the air outlet pipe (2034) is connected to the upper end of the second cooling channel (2031). A pressure control valve (2035) is provided on the air outlet pipe (2034).

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