Octagonal pipe multi-work-head die

Abstract

The utility model discloses a multi-work-head die for an octagonal pipe, and aims to provide the multi-work-head die for the octagonal pipe, which improves the machining precision through separate machining. The die comprises an upper die, a lower die and an embedded work head, the upper die is connected with the lower die, an inlet sinking bridge is arranged on the upper die, a discharging hole is formed in the lower die, the embedded work head is arranged in the inlet sinking bridge, and the inlet sinking bridge is communicated with the discharging hole. The device has the advantages that the machining precision is improved through separate machining, better feeding is guaranteed, sectional materials are welded conveniently, better discharging can be achieved, sectional material forming is guaranteed, and the device can correspond to the inner wall structure of the sectional materials.

Description

Technical Field

[0001] The utility model relates to the technical field related to molds, in particular to an octagonal tube multi-head mold. Background Art

[0002] Aluminum products have a series of excellent properties, such as good strength, good weather resistance, low density, etc., and are often used to make radiator parts or exterior decoration parts. At present, in the production process of aluminum profiles, extrusion dies are needed to shape the aluminum profiles. Multi-head hot extrusion dies are a type of die used in the hot extrusion process for the production of non-ferrous metal and steel profiles, pipes and special-shaped materials. Most of the current extrusion dies are processed in one piece, and the processing process is difficult, and it is easy to have problems with insufficient processing accuracy.

[0003] China Patent Authorization Announcement No.: CN218656164U, Authorization Announcement Date: March 21, 2023, discloses a double-tube multi-head aluminum extrusion die, including an upper die and a lower die that cooperate with each other, the upper die is provided with a plurality of feed holes, and auxiliary bridges are respectively provided between adjacent feed holes, characterized in that a back hole is provided at the center of the upper die, and an auxiliary bridge sinking bridge is provided in the back hole to evenly divide the back hole into three parts. The disadvantage of this utility model is that the upper die and the lower die of the die are processed as one piece, and the smaller holes inside are not easy to process. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the prior art that most of the molds are processed in one piece and the processing process is difficult, and provides an octagonal tube multi-head mold which improves the processing accuracy through separate processing.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An octagonal tube multi-head mold comprises an upper mold, a lower mold and an inner head. The upper mold is connected to the lower mold, an inlet sinker bridge is provided on the upper mold, a discharge hole is provided on the lower mold, the inner head is placed in the inlet sinker bridge, and the inlet sinker bridge is connected to the discharge hole.

[0007] The mold as a whole is composed of three parts: an upper mold, a lower mold and an inner foreman. The upper mold is assembled with the inner foreman and then connected to the lower mold. The raw material enters the upper mold from the inlet sinker bridge and is gradually plasticized by the inner foreman in the inlet sinker bridge. Since the cross-sectional shape of the octagonal tube is composed of multiple small foreman, it is difficult to process the mold as a whole. Therefore, the inner foreman and the upper mold are processed separately to improve the processing accuracy. After being plasticized by the inner foreman and the upper mold, the mold is formed at the connection between the upper mold and the lower mold. The formed profile is extruded from the discharge hole to complete the production of the profile. The upper mold and the inner foreman inside are produced separately, which can improve the accuracy of the holes and the accuracy of the profile processing, thereby achieving the purpose of improving the processing accuracy by separate processing.

[0008] Preferably, the upper die is provided with a main bridge, and the main bridge is provided with a plurality of circumferentially evenly distributed diverter holes, and an outlet bridge is installed between two adjacent diverter holes. The main bridge is opened on the upper die to distribute the metal flow into the mold cavity, which is crucial to ensure that the metal flow evenly fills the mold cavity, reduces the metal flow dead zone, and improves the quality and production efficiency of the extruded parts. The diverter holes mainly feed the outside of the profile, and distribute the metal flow to each cavity of the mold during the extrusion process to form the required product shape. The feeding of the upper die adopts a multi-level layered feeding method to ensure uniform feeding, and solve the problem of insufficient feeding in cooperation with the middle inlet sinking bridge. An outlet bridge is installed between the two diverter holes at the discharge end. The outlet bridge serves as a transition area for the metal flow to flow from the inside of the mold to the outside. It guides the metal flow to be smoothly extruded from the mold cavity. Such a design can ensure better feeding.

[0009] Preferably, a welding chamber is provided on the lower die, and the welding chamber corresponds to the diversion hole, and the welding chamber corresponds to the discharge hole. The raw materials entering from the main bridge, the diversion hole and the inlet sinking bridge converge in the welding chamber to promote uniform distribution and welding of the metal flow. After welding in the welding chamber, the raw materials are extruded from the discharge hole. Such a design facilitates the welding of profiles.

[0010] Preferably, a discharge hole is provided with a discharge back cutter on the side of the discharge hole, and the cross-section of the discharge back cutter is conical. A discharge hole with a certain taper is provided on the side of the discharge hole, which ensures the strength of the mold and enables smooth discharge. Such a design can better discharge the material.

[0011] Preferably, a foreman welding is installed at one end of the inlet sinking bridge, one end of the foreman welding is connected to the upper mold, and the other end of the foreman welding is placed in the discharge hole. The foreman welding is installed on the upper mold, and one end extends into the discharge port. When the raw material is in the welding chamber, the welding chamber cooperates with the foreman welding to ensure the molding of the profile, and ensure that the profile can maintain its shape from the welding chamber to the discharge port. The welding foreman distributes the metal flow to each cavity of the mold to ensure that the metal can flow into the cavity evenly. Such a design can ensure the molding of the profile.

[0012] Preferably, one end of the inner head is placed in the inlet sinking bridge, and the other end of the inner head matches the welding head. The inner head is provided with a lower hollow cutter. The inner head is placed in the inlet sinking bridge to ensure the structural characteristics inside the profile and cooperate with the upper die to extrude the octagonal tube. The design of the inner head is also convenient for replacement and maintenance. The outlet end of the inner head corresponds to the welding of the head to ensure the forming of the octagonal tube. At the same time, a lower hollow cutter is provided on the inner head. The lower hollow cutter plays an important role in bearing the mold cavity, ensuring the strength of the working belt and controlling the flow rate. Such a design can correspond to the inner wall structure of the profile.

[0013] The beneficial effects of the utility model are: improving the processing accuracy through separate processing, ensuring better feeding, facilitating welding of profiles, enabling better discharging, ensuring the shaping of the profiles, and being able to correspond to the inner wall structure of the profiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 yes Figure 1 Side view of

[0016] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle and upper mold;

[0017] Figure 4 yes Figure 1 Schematic diagram of the structure of the inner foreman.

[0018] In the figure: 1. Upper die; 2. Lower die; 3. Inlaid foreman; 4. Inlet sinking bridge; 5. Discharge hole; 6. Main bridge; 7. Diversion hole; 8. Exit bridge; 9. Welding chamber; 10. Empty knife after discharge; 11. Foreman welding; 12. Lower empty knife. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0020] like Figure 1 , Figure 2In the illustrated embodiment, an octagonal tube multi-head mold comprises an upper mold 1, a lower mold 2 and an inner head 3. The upper mold 1 is connected to the lower mold 2. An inlet sinker bridge 4 is provided on the upper mold 1, and a discharge hole 5 is provided on the lower mold 2. The inner head 3 is placed in the inlet sinker bridge 4, and the inlet sinker bridge 4 is connected to the discharge hole 5.

[0021] like Figure 3 As shown, a main bridge 6 is provided on the upper die 1 , and a plurality of circumferentially evenly distributed diversion holes 7 are provided on the main bridge 6 , and an outlet bridge 8 is installed between two adjacent diversion holes 7 .

[0022] The lower die 2 is provided with a welding chamber 9, which corresponds to the diversion hole 7 and the discharge hole 5.

[0023] A discharge rear empty knife 10 is provided on the side of the discharge hole 5, and the cross-section of the discharge rear empty knife 10 is conical.

[0024] A foreman weld 11 is installed at one end of the inlet sinking bridge 4 , one end of the foreman weld 11 is connected to the upper mold 1 , and the other end of the foreman weld 11 is placed in the discharge hole 5 .

[0025] like Figure 4 As shown, one end of the inner foreman 3 is placed in the inlet sinking bridge 4, and the other end of the inner foreman 3 matches the foreman welding 11. The inner foreman 3 is provided with a lower hollow knife 12.

[0026] During assembly, the upper die 1 adopts multi-layer graded feeding, and the separate processing method solves the problem of feeding and processing the inner hole. Since the middle of the cross section of this profile is composed of multiple small heads, there are many ribs in the middle and the space is small, it is necessary to ensure both sufficient feeding and the strength of the heads. Therefore, the upper die 1 adopts a two-layer feeding method, and the processing and assembly are separated, that is, the upper die 1 and the inner head 3 are assembled after the two parts are processed separately.

[0027] The diverter hole 7 mainly feeds the outside of the profile, and the inner foreman 3 mainly feeds the middle hole. There are 8 main bridges 6, which ensure the strength of the mold under the premise of symmetry. The outlet bridge 8 is designed to be 4MM wide, which ensures good welding. The main purpose of the inlet sinking bridge 4 is to increase the feeding in the middle. The middle section has many holes and small holes, which will cause insufficient feeding. This design can increase the feeding in the middle and reduce the friction in the middle, thereby solving the problem of insufficient feeding in the middle. Extrusion and welding are carried out in the welding chamber 9. The foreman welding 11 of the upper mold 1 is designed to be 10MM straight plus 35 degrees of oblique protection to ensure feeding and foreman strength. The empty knife 10 after discharging is designed with a 4-degree taper, which can ensure both mold strength and smooth discharging.

Claims

1. An octagonal tube multi-head mold, characterized in that: The invention comprises an upper die (1), a lower die (2) and an inner insert head (3), wherein the upper die (1) and the lower die (2) are connected, the upper die (1) is provided with an inlet sinking bridge (4), the lower die (2) is provided with a discharge hole (5), the inner insert head (3) is placed in the inlet sinking bridge (4), the inlet sinking bridge (4) is connected with the discharge hole (5), the upper die (1) is provided with a main bridge (6), the main bridge (6) is provided with a plurality of circumferentially evenly distributed diversion holes (7), and an outlet bridge (8) is installed between two adjacent diversion holes (7).

2. An octagonal tube multi-head mold according to claim 1, characterized in that: The lower mold (2) is provided with a welding chamber (9), the welding chamber (9) corresponds to the diversion hole (7), and the welding chamber (9) corresponds to the discharge hole (5).

3. The octagonal tube multi-head mold according to claim 1, characterized in that: A discharge rear empty knife (10) is provided on the side of the discharge hole (5), and the cross-sectional shape of the discharge rear empty knife (10) is conical.

4. The octagonal tube multi-head mold according to claim 1, characterized in that: A foreman weld (11) is installed at one end of the inlet sinking bridge (4), one end of the foreman weld (11) is connected to the upper mold (1), and the other end of the foreman weld (11) is placed in the discharge hole (5).

5. The octagonal tube multi-head mold according to claim 1, characterized in that: One end of the inner-mounted foreman (3) is placed in the inlet sinking bridge (4), and the other end of the inner-mounted foreman (3) matches the foreman welding (11). The inner-mounted foreman (3) is provided with a lower hollow knife (12).

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