Battery pack profile extrusion die

Abstract

The utility model discloses a battery pack profile extrusion die, and aims to provide a battery pack profile extrusion die which is convenient for controlling feed flow and flow velocity and improving production benefit and yield. The die comprises an upper die, the upper die is provided with a decompression line, one side of the upper die is provided with a plurality of feeding holes, the hole walls of the feeding holes are provided with feeding corners, one side of the upper die is provided with a feeding port sinking bridge, the other side of the upper die is provided with a discharging port sinking bridge, the upper die is connected with a lower die, the lower die is provided with a first-stage welding chamber and a second-stage welding chamber, and the first-stage welding chamber is connected with the discharging port sinking bridge. The upper die is provided with multiple stages of standby holes, and the hole diameters of the multiple stages of standby holes are gradually reduced from one side of the feed port sinking bridge to one side of the discharge port sinking bridge. The battery pack profile extrusion die has the beneficial effects that the reasonable feeding flow and the balanced flow velocity are realized by the battery pack profile extrusion die; extrusion forming is uniform and flat, and wall deviation is prevented; the service life of the extrusion structure is prolonged; the mold opening times are reduced; the economic benefits are increased; and the production efficiency, the yield and the profile stability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of extrusion dies, in particular to an extrusion die for a battery pack profile. Background Art

[0002] Extrusion is mainly used for metal forming, and can also be used for the forming of non-metallic materials such as plastics, rubber, graphite and clay blanks, including new energy vehicle battery pack profiles. It is a pressure processing method that uses a punch or a punch to pressurize the blank placed in the die to cause plastic flow, thereby obtaining a part corresponding to the shape of the mold hole or the concave and convex molds.

[0003] China Patent Authorization Announcement Number: CN 210450354 U, Authorization Announcement Date: May 5, 2020. This utility model involves a new energy battery pack hanging ear profile extrusion die, including: an upper die and a lower die, the upper die is a diverter die, the lower die is a forming die matching the diverter die, the upper die includes a die core, a diverter hole and a diverter bridge, the diverter hole includes a peripheral diverter hole and an intermediate diverter hole, and the lower die includes a flow block structure located on the end surface around the lower die forming hole. The disadvantage of this technical solution is that it is difficult to achieve targeted feed flow and flow rate control for the first to tenth diverter bridges in the case of extrusion of asymmetric profiles (including large and small heads), resulting in uneven extrusion and wall deviation, which reduces the production efficiency and yield of the battery pack.

[0004] In summary: profile extrusion dies have the disadvantages of difficult to control feed flow rate and poor extrusion effect, which reduces the production efficiency and yield rate of battery packs. Utility Model Content

[0005] The utility model aims to overcome the shortcomings of the profile extrusion die in the prior art, such as the difficulty in controlling the feed flow rate and flow velocity, the poor extrusion effect and the reduction in the production efficiency and yield rate of the battery pack, and provides a battery pack profile extrusion die which is easy to control the feed flow rate and flow velocity, and improves the production efficiency and yield rate.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A battery pack profile extrusion die comprises an upper die, the upper die is provided with a decompression line, a plurality of feed holes are provided on one side of the upper die, the hole walls of the feed holes are set as feed angles, a feed port sink bridge is provided on one side of the upper die, a discharge port sink bridge is provided on the other side of the upper die, the upper die is connected to a lower die, the lower die is provided with a primary welding chamber and a secondary welding chamber, the primary welding chamber is connected to the discharge port sink bridge and arranged, the upper die is provided with multi-stage prepared holes, and the apertures of the multi-stage prepared holes gradually decrease from the feed port sink bridge side to the discharge port sink bridge side.

[0008] Several feed holes are arranged in the upper die to realize the diversion of the extruded materials. A feed port sinking bridge is designed between the feed holes on one side of the upper die, and a discharge port sinking bridge is arranged on the other side of the upper die. The feed port sinking bridge cooperates with the decompression line and the feed angle between adjacent feed holes to facilitate the rapid filling and reduce the resistance after the feed is decompressed, so as to reasonably feed the material under the bridge. The discharge port sinking bridge expands the feed aperture to prevent the small foreman from falling outward due to insufficient feeding. The multi-stage preparation holes are opened at the feed hole close to one side to realize the extrusion and shaping of asymmetric profiles. The opening position of the multi-stage preparation holes is the small foreman position of the profile. At the same time, the aperture size from the feed point to the discharge point gradually decreases, thereby realizing the angle change of the hole wall, so that the flow rate can be controlled when the feed enters the small foreman, so that the flow rate entering the small foreman position is balanced with the flow rate at the large foreman position, and preventing excessive material from failing to form. The lower die is provided with a primary welding chamber and a secondary welding chamber. The primary welding chamber cooperates with the spatial connection with the outlet sinking bridge to form the simultaneous welding effect of the upper and lower dies, ensure the welding strength of the foreman, and extend the service life of the die; the lower die is provided with a secondary welding chamber, and the secondary welding chamber adds secondary welding according to the position, that is, in terms of the speed of the profile, the secondary welding is close to the profile in the fast place, and the space is more open in the slow place, so that more material can enter the thin place and reduce the feed in the thick place, and further make the flow rate more balanced to adapt to the forming of asymmetric profiles with multiple foreman. Achieve the effect of reasonable feed flow and balanced flow rate, uniform and smooth extrusion forming, prevent wall deviation, extend the service life of the extrusion structure, reduce the number of mold openings and increase economic benefits, and improve production efficiency and yield rate.

[0009] As a preferred method, there are eight feed holes and they are arranged symmetrically, and the multi-stage spare holes are placed inside the enclosure of each feed hole and close to one side of the feed hole. The feed is diverted through multiple diversion holes, and the sinking bridge is used to reduce the extrusion force during the diversion, so that the flow is reasonably distributed, and the multi-stage spare holes are used to divert the asymmetric profiles to the large and small heads in a targeted manner. The effect of ensuring the reasonable feed flow and balanced flow rate, uniform and smooth extrusion and high yield is achieved.

[0010] Preferably, the upper die is provided with a calibration edge, which is used as an auxiliary calibration line to provide structure and extrusion positioning for the asymmetric profile, thereby achieving the effect of enhancing the extrusion stability.

[0011] As a preferred embodiment, the sinking depth of the feed inlet sinking bridge is 5 mm. The 5 mm deep sinking bridge design provides reasonable feeding for the sinking bridge bottom, thereby achieving the effect of ensuring the rationality of feeding.

[0012] As a preferred embodiment, the sinking depth of the discharge port sinking bridge is 20mm. The 20mm depth sinking bridge design prevents the small foreman from falling out due to insufficient feeding, thereby further ensuring the rationality of feeding and preventing deformation of profiles.

[0013] As a preferred method, the depth of the primary welding chamber is 25 mm, so as to ensure the feeding stability of the welding chamber and the strength of the profile of the foreman, so as to achieve the effect of improving the stability of the profile.

[0014] The beneficial effects of the utility model are as follows: the battery pack profile extrusion die realizes reasonable feed flow and balanced flow rate; the extrusion forming is uniform and smooth, and the wall deviation is prevented; the service life of the extrusion structure is extended; the number of mold opening times is reduced and the economic benefits are increased; and the production efficiency, yield rate and profile stability are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view of the utility model;

[0016] Figure 2 yes Figure 1 sectional view of .

[0017] In the figure: 1. upper die, 2. pressure relief line, 3. feed hole, 4. feed angle, 5. feed port sinking bridge, 6. discharge port sinking bridge, 7. lower die, 8. primary welding chamber, 9. secondary welding chamber, 10. multi-stage preparation holes, 11. calibration edge. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0020] Unless otherwise specified, the relative arrangement of the components, numerical expressions and numerical values ​​described in these embodiments do not limit the scope of the present application. For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" are used in the embodiments to illustrate the relationship between an element or feature shown in the figure and another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or located in other orientations), and the spatial relative description used here can be interpreted accordingly. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, process and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, process and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values.It should be noted that similar reference numerals and letters denote similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0021] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application. Embodiment 1:

[0022] like Figure 1 , 2As shown, a battery pack profile extrusion die comprises an upper die 1, the upper die 1 is provided with a pressure relief line 2, a plurality of feed holes 3 are provided on one side of the upper die 1, the hole wall of the feed hole 3 is set as a feed angle 4, a feed port sinking bridge 5 is provided on one side of the upper die 1, and a discharge port sinking bridge 6 is provided on the other side of the upper die 1, the upper die 1 is connected to a lower die 7, the lower die 7 is provided with a primary welding chamber 8 and a secondary welding chamber 9, the primary welding chamber 8 is arranged in connection with the discharge port sinking bridge 6, the upper die 1 is provided with a multi-stage preparation hole 10, and the aperture of the multi-stage preparation hole 10 gradually decreases from the side of the feed port sinking bridge 5 to the side of the discharge port sinking bridge 6. There are eight feed holes 3 and they are arranged symmetrically, and the multi-stage preparation holes 10 are placed inside the enclosure of each feed hole 3 and close to one side of the feed hole 3. The upper die 1 is provided with a calibration edge 11. The sinking depth of the feed port sinking bridge 5 is 5 mm. The sinking depth of the discharge port sinking bridge 6 is 20 mm. The depth of the primary welding chamber 8 is 25 mm. The outer foreman is also designed with a 5-degree protection tower to effectively prevent the problem of thinness.

[0023] During use: after feeding, the material enters the first-level welding chamber 8 and the second-level welding chamber 9 through the pressure reducing line 2, the feeding hole 3, the feeding port sinking bridge 5, the feeding angle 4 and the discharging port sinking bridge 5, and then is sent out to become the large foreman forming part. Synchronously, the material enters from the multi-level spare hole 10 with a controlled amount balanced with the flow rate of the large foreman and enters for extrusion to become the small foreman forming part, completing the asymmetric large and small foreman profile forming of the battery pack profile.

[0024] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery pack profile extrusion die, characterized in that: The invention comprises an upper die (1), wherein the upper die (1) is provided with a pressure relief line (2), a plurality of feed holes (3) are provided on one side of the upper die (1), the hole wall of the feed hole (3) is set as a feed angle (4), a feed inlet sink bridge (5) is provided on one side of the upper die (1), and a discharge outlet sink bridge (6) is provided on the other side of the upper die (1), the upper die (1) is connected to a lower die (7), the lower die (7) is provided with a primary welding chamber (8) and a secondary welding chamber (9), the primary welding chamber (8) is arranged in connection with the discharge outlet sink bridge (6), and the upper die (1) is provided with a multi-stage prepared hole (10), the aperture of the multi-stage prepared hole (10) gradually decreases from the side of the feed inlet sink bridge (5) to the side of the discharge outlet sink bridge (6).

2. A battery pack profile extrusion die according to claim 1, characterized in that: The feed holes (3) are provided with eight and are arranged symmetrically, and the multi-stage preparation holes (10) are placed inside the enclosure of each feed hole (3) and close to one side feed hole (3).

3. The battery pack profile extrusion die according to claim 1, characterized in that: The upper mold (1) is provided with a calibration edge (11).

4. The battery pack profile extrusion die according to claim 1, characterized in that: The sinking bridge (5) of the feed inlet has a sinking bridge depth of 5 mm.

5. The battery pack profile extrusion die according to claim 1, characterized in that: The sinking depth of the discharge port sinking bridge (6) is 20 mm.

6. The battery pack profile extrusion die according to claim 1, characterized in that: The depth of the primary welding chamber (8) is 25 mm.

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