Hot extrusion die for air cylinder profile

Abstract

The utility model discloses a hot extrusion die of a cylinder profile, which comprises an upper die and a lower die, the upper die and the lower die are tightly matched with each other to form a die body, a shunting bridge is arranged in the upper die, the upper die is divided by the shunting bridge to form four shunting holes which are distributed in a cross shape, and the shunting holes are communicated with the shunting bridge. A mold core is installed on the side, close to the lower mold, of the flow dividing bridge and comprises a discharging section connected with the flow dividing bridge, a forming section connected with the discharging section and a forming section connected with the flow dividing bridge. According to the utility model, the temperature of an aluminum flow can be effectively increased, so that the aluminum flow is more easily extruded and can be smoothly transited to the discharging section, a large amount of aluminum oxide particles are prevented from being generated, and meanwhile, the flow speed of the aluminum flow can be increased, part of formed aluminum oxide particles can be easily washed away and prevented from being attached and gathered on the forming section; therefore, an inner cavity of the formed air cylinder profile is prevented from being scratched, and the air cylinder profile can be produced with quality and quantity guaranteed.

Description

Technical Field

[0001] The utility model specifically relates to a hot extrusion die for a cylinder profile. Background Art

[0002] In the aluminum extrusion processing industry, aluminum alloy has low density, but relatively high strength, good plasticity, good extrusion formability, excellent conductivity, thermal conductivity and corrosion resistance, and is safe and recyclable. Therefore, it is widely used in technical fields such as construction, electric vehicles, ships, aerospace, etc. Among them, in pneumatic devices, cylinder profiles, that is, cylinder bodies, as the core components of pneumatic devices, are usually produced by hot extrusion at high temperatures using molds.

[0003] However, when traditional hot extrusion dies are used to produce cylinder profiles, the surface of the cylinder profile is easily oxidized due to the high temperature environment, forming aluminum oxide particles. As the aluminum oxide particles adhere and aggregate, the inner cavity of the cylinder profile is easily scratched during molding, resulting in a rough surface that affects its use.

[0004] Therefore, it is necessary to invent a hot extrusion die for cylinder profile to solve the above problems. Utility Model Content

[0005] (I) Purpose of the utility model

[0006] In order to solve the technical problems existing in the background technology, the utility model proposes a hot extrusion die for a cylinder profile, which can effectively increase the temperature of the aluminum flow, making the aluminum flow easier to be extruded, and can smoothly transition to the discharging section to avoid the large-scale generation of aluminum oxide particles. At the same time, the flow rate of the aluminum flow can be increased to easily wash away partially formed aluminum oxide particles to prevent them from adhering to and gathering on the forming section, thereby avoiding scratches on the inner cavity of the formed cylinder profile, so that the cylinder profile can be produced with guaranteed quality and quantity.

[0007] (II) Technical solution

[0008] In order to achieve the above object, the utility model provides the following technical solutions: a hot extrusion die for a cylinder profile, comprising an upper die and a lower die, wherein the upper die and the lower die are tightly fitted and assembled into a die body;

[0009] A diverter bridge is provided inside the upper mold, and the upper mold is divided by the diverter bridge to form four diverter holes distributed in a cross shape, and a mold core is installed on the side of the diverter bridge close to the lower mold;

[0010] The mold core includes a discharge section connected to the diverter bridge, a molding section connected to the discharge section, and molding heads connected to the diverter bridge and located at four corners of the discharge section;

[0011] Wherein, the forming section is arranged as an inclined surface, and a transition arc surface is arranged at the connection between the discharging section and the diversion bridge;

[0012] The molding section is in the shape of a circle with a plurality of grooves evenly spaced apart, and the vertical spacing between the molding section and the diversion hole is greater than 10 mm, and the vertical spacing between each molding head and the diversion holes on both sides thereof is greater than 20 mm.

[0013] Preferably, the inclination angle of the forming section is set to 3-5 degrees.

[0014] Preferably, the angle of the transition arc surface is set to 25-30 degrees.

[0015] Preferably, the lower mold includes a welding chamber, a mold cavity, and a discharge hole. The welding chamber is arranged close to the upper mold and is connected to the discharge hole through the mold cavity.

[0016] Preferably, the cavity is adapted to the mold core and is used for hot extrusion molding of the cylinder profile.

[0017] Preferably, the discharge hole is arranged in a stepped shape from inside to outside.

[0018] Preferably, the upper die and the lower die are both disc-shaped, and the upper die and the lower die are tightly fitted with each other by pins or bolts to form a die body.

[0019] Compared with the prior art, the above technical solution of the utility model has the following beneficial effects:

[0020] 1. The utility model has a vertical spacing of more than 10mm between the forming section and the diverter hole, and a vertical spacing of more than 20mm between each forming head and the diverter holes on both sides thereof, so that the external aluminum rod has sufficient friction with the diverter bridge and the upper die during extrusion, which can effectively increase the temperature of the aluminum flow, making the aluminum flow easier to be extruded, reducing the oxidation of the aluminum flow, and avoiding the large-scale generation of aluminum oxide particles. At the same time, the transition arc surface allows the aluminum flow to smoothly transition to the discharge section, reducing the friction at the outlet of the aluminum flow diverter hole, and further reducing the generation of aluminum oxide particles;

[0021] 2. The utility model sets the outer wall of the forming section at an inclination angle of 3-5 degrees as a whole, so that the aluminum flow can flow quickly in the forming section, and can easily wash away part of the formed aluminum oxide particles to prevent them from adhering to and gathering on the forming section, thereby preventing the inner cavity of the formed cylinder profile from being scratched, so that the cylinder profile can be produced with guaranteed quality and quantity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is an exploded view of the utility model;

[0025] Figure 3 It is a schematic diagram of the upper mold structure of the utility model;

[0026] Figure 4 It is a front view of the upper die of the utility model;

[0027] Figure 5 It is a cross-sectional view of the cylinder profile.

[0028] Description of reference numerals:

[0029] 100 upper mold, 101 diverter bridge, 102 diverter hole, 103 mold core, 103a discharge section, 103b forming section, 103c forming head, 104 transition arc surface;

[0030] 200 lower die, 201 welding chamber, 202 cavity, 203 discharge hole. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0032] The utility model provides Figure 1-4 A hot extrusion die for a cylinder profile shown in the figure comprises an upper die 100 and a lower die 200, wherein the upper die 100 and the lower die 200 are tightly fitted with each other and assembled into a die body;

[0033] The upper mold 100 is provided with a shunt bridge 101 inside. The upper mold 100 is divided by the shunt bridge 101 to form four shunt holes 102 distributed in a cross shape. A mold core 103 is installed on the side of the shunt bridge 101 close to the lower mold 200.

[0034] The mold core 103 includes a discharge section 103a connected to the diverter bridge 101, a molding section 103b connected to the discharge section 103a, and molding heads 103c connected to the diverter bridge 101 and located at four corners of the discharge section 103a.

[0035] The forming section 103b is configured as an inclined surface, and a transition arc surface 104 is configured at the connection between the discharge section 103a and the diversion bridge 101;

[0036] The molding section 103b is in the shape of a circle with a number of grooves evenly spaced apart, and the vertical spacing between the molding section 103b and the diversion hole 102 is greater than 10 mm, and the vertical spacing between each molding head 103c and the diversion holes 102 on both sides thereof is greater than 20 mm, which can effectively increase the temperature of the aluminum flow, making the aluminum flow easier to be extruded, reducing the oxidation of the aluminum flow, and avoiding the large-scale generation of aluminum oxide particles.

[0037] In one embodiment, the inclination angle of the forming section 103b is set to 3-5 degrees, so that the aluminum flow can quickly flow to the forming section 103b, and the angle of the transition arc surface 104 is set to 25-30 degrees, so that the aluminum flow can smoothly transition to the discharge section 103a. The two complement each other and can effectively avoid the large-scale generation of aluminum oxide particles.

[0038] In one embodiment, the lower mold 200 includes a welding chamber 201, a cavity 202, and a discharge hole 203. The welding chamber 201 is arranged close to the upper mold 100 and is connected to the discharge hole 203 through the cavity 202. The cavity 202 is adapted to the mold core 103 and is used for hot extrusion molding of the cylinder profile. The discharge hole 203 is arranged in a stepped shape from the inside to the outside, so that the cylinder profile can be discharged smoothly, thereby ensuring the surface quality of the cylinder profile.

[0039] In one embodiment, the upper mold 100 and the lower mold 200 are both configured to be disc-shaped, ensuring the stability and centering of the mold body, and the upper mold 100 and the lower mold 200 are tightly fitted with each other through pins or bolts to assemble into a mold body, which is convenient for assembly of the mold body and easy to put into use.

[0040] The specific implementation mode is as follows: when the utility model is in use, the aluminum flow is blocked by the diverter bridge 101 of the upper mold 100 and is evenly divided into four streams, and then flows to the mold core 103 after being dispersed through the four diverter holes 102, so that the aluminum flow is evenly and stably gathered in the welding chamber 201, and finally a cylinder profile is formed at the pores between the mold cavity 202 and the mold core 103, and then discharged through the discharge hole 203, thereby realizing the hot extrusion production of the cylinder profile;

[0041] Since the vertical spacing between the forming section 103b and the diverter hole 102 is greater than 10mm, and the vertical spacing between each forming head 103c and the diverter holes 102 on both sides thereof is greater than 20mm, not only the diverter bridge 101 has sufficient supporting force and high stability, which can maintain the stability of the aluminum flow, but also the cross-sectional area of ​​the diverter hole 102 can be reduced, so that the external aluminum rod has sufficient friction with the diverter bridge 101 and the upper mold 100 during extrusion, which can effectively increase the temperature of the aluminum flow, make the aluminum flow easier to be extruded, reduce the oxidation of the aluminum flow, and avoid the large-scale generation of aluminum oxide particles;

[0042] At the same time, when the aluminum flow flows in the diverter hole 102 toward the discharge section 103a, since the angle of the transition arc surface 104 is set to 25-30 degrees, and the inclination direction is along the direction from the upper mold 100 to the lower mold 200, the aluminum flow can smoothly transition to the discharge section 103a, reducing the friction at the outlet of the aluminum flow diverter hole 102, and further reducing the generation of aluminum oxide particles;

[0043] The outer wall of the forming section 103b is provided with an inclination angle of 3-5 degrees as a whole, and the inclination direction is along the direction from the upper mold 100 to the lower mold 200, and the whole is inclined inward, so that the aluminum flow can flow quickly at the forming section 103b, so that the partially formed aluminum oxide particles are easily washed away and quickly separated from the forming section 103b, avoiding adhesion and aggregation on the forming section 103b in a high-temperature softened state, thereby avoiding scratches on the inner cavity of the formed cylinder profile, so that the cylinder profile can be produced with guaranteed quality and quantity;

[0044] This embodiment specifically solves the problem in the prior art that when the current hot extrusion die is used to produce cylinder profiles, the surface of the cylinder profile is easily oxidized due to the high temperature environment to form aluminum oxide particles. As the aluminum oxide particles adhere and aggregate, the inner cavity of the cylinder profile is easily scratched during molding, resulting in a rough surface and affecting use.

[0045] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hot extrusion die for a cylinder profile, characterized in that: It comprises an upper mold (100) and a lower mold (200), wherein the upper mold (100) and the lower mold (200) are tightly matched with each other and assembled into a mold body; A diverter bridge (101) is provided inside the upper mold (100), and the upper mold (100) is divided by the diverter bridge (101) to form four diverter holes (102) distributed in a cross shape, and a mold core (103) is installed on one side of the diverter bridge (101) close to the lower mold (200); The mold core (103) comprises a discharge section (103a) connected to the diverter bridge (101), a molding section (103b) connected to the discharge section (103a), and molding heads (103c) connected to the diverter bridge (101) and located at four corners of the discharge section (103a); The forming section (103b) is arranged as an inclined surface, and a transition arc surface (104) is arranged at the connection between the discharge section (103a) and the diversion bridge (101); The molding section (103b) is in the shape of a circle with a plurality of grooves evenly spaced apart, and the vertical spacing between the molding section (103b) and the diversion hole (102) is greater than 10 mm, and the vertical spacing between each molding head (103c) and the diversion holes (102) on both sides thereof is greater than 20 mm.

2. The hot extrusion die for a cylinder profile according to claim 1, characterized in that: The inclination angle of the forming section (103b) is set to 3-5 degrees.

3. The hot extrusion die for a cylinder profile according to claim 1, characterized in that: The angle of the transition arc surface (104) is set to 25-30 degrees.

4. The hot extrusion die for a cylinder profile according to claim 1, characterized in that: The lower mold (200) comprises a welding chamber (201), a mold cavity (202), and a discharge hole (203); the welding chamber (201) is arranged close to the upper mold (100) and is connected to the discharge hole (203) through the mold cavity (202).

5. The hot extrusion die for a cylinder profile according to claim 4, characterized in that: The mold cavity (202) is matched with the mold core (103) and is used for hot extrusion molding of the cylinder profile.

6. The hot extrusion die for a cylinder profile according to claim 4, characterized in that: The discharge hole (203) is arranged in a stepped shape from the inside to the outside.

7. The hot extrusion die for a cylinder profile according to claim 1, characterized in that: The upper die (100) and the lower die (200) are both arranged in a disc shape, and the upper die (100) and the lower die (200) are tightly fitted with each other through pins or bolts to form a die body.

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