An injection mold and molding method for forming a motor cover plate of a new energy vehicle

Abstract

The present invention relates to the technical field of injection molds, and discloses an injection mold and a molding method for molding a motor cover plate of a new energy vehicle. The motor cover plate includes a main body and a metal conductor. The metal conductor includes a first conductive sheet, a second conductive sheet, and a connecting portion. The injection mold includes a fixed mold, which includes a fixed mold plate, a fixed mold core, and a hot runner; a movable mold, which includes a movable mold plate and a movable mold core; a core pulling mechanism, which is arranged along the circumference of the movable mold core and the fixed mold core, and includes a plurality of sliders, and the plurality of sliders include a first slider; a cutting mechanism, which includes a driving cylinder, a sliding block, a driving block, and a punching head. The driving cylinder can drive the sliding block to slide; the sliding block can drive the driving block to move up and down so that the punching head can cut off the connecting portion. The advantages of the present invention are that the mold adopts molding first and then cutting, which can solve the problem of inconvenient positioning and fixing of the metal conductor in the mold; and the positioning and fixing position of the metal conductor is highly accurate, and the product molding quality is high.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molds, and in particular to an injection mold and a molding method for molding a motor cover plate of a new energy vehicle. Background Art

[0002] The main material of the motor cover of new energy vehicles is plastic. During use, the electronic components in the motor need to be connected to electricity, so some metal conductive sheets or cables are generally set in the motor cover for connecting to the power supply.

[0003] Existing motor covers are typically injection molded first, with the metal conductive sheets installed later. This requires pre-positioned structures on the cover to position and secure the metal conductive sheets, complicating the cover's structure and cumbersome assembly. This also creates the risk of loosening wires during later use. If the metal conductive sheets were integrally injection molded into the cover, the positioning and securing of each sheet would need to be addressed. Furthermore, for some metal conductive sheets that are difficult to position and secure within the injection mold, this difficulty would need to be addressed. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to propose an injection mold and molding method for molding motor covers for new energy vehicles, which are convenient for positioning and fixing inserts, have high insert molding position accuracy, and are formed first and then punched.

[0005] The present invention solves its technical problem by adopting a technical solution that provides an injection mold for forming a motor cover for a new energy vehicle. The motor cover includes a main body and a metal conductor that is insert-molded integrally with the main body. The main body has a connector. The metal conductor includes a first conductive sheet, a second conductive sheet, and a connecting portion connected between the first conductive sheet and the second conductive sheet. The first conductive sheet and the second conductive sheet both extend into the connector. The injection mold includes:

[0006] The fixed mold comprises a fixed mold plate, a fixed mold core and a hot runner, wherein the fixed mold core is arranged on the fixed mold plate, and the hot runner is passed through the fixed mold plate and the fixed mold core;

[0007] A movable mold is movably arranged below the fixed mold, comprising a movable mold plate and a movable mold core arranged on the movable mold plate, wherein the movable mold core and the fixed mold core are movably offset from each other;

[0008] A plurality of core-pulling mechanisms are arranged along the circumference of the movable mold core and the fixed mold core, and include a plurality of sliders. The fixed mold core, the movable mold core, and the plurality of sliders form a cavity for molding the motor cover. The hot runner is connected to the cavity, and the metal conductor is disposed in the cavity. The plurality of sliders include a first slider for molding the joint.

[0009] The cutting mechanism includes a driving cylinder, a sliding block, a driving block and a punching head, wherein the sliding block is arranged on the fixed template; the telescopic shaft of the driving cylinder is connected to the sliding block and can drive the sliding block to slide; the punching head is fixedly connected to the driving block, and the lower end of the punching head movably extends into the mold cavity; the driving block is movably connected to the sliding block, and the sliding block can drive the driving block to move up and down, so that the punching head can cut off the connecting part.

[0010] Furthermore, the first slider is provided with a fixing portion, and one end of both the first conductive sheet and the second conductive sheet can be detachably fixed to the fixing portion;

[0011] After the punching head cuts off the connecting portion, the first slider moves to a side away from the metal conductor, and the first conductive sheet and the second conductive sheet are detached from the fixing portion.

[0012] Furthermore, after the punching head cuts off the connecting portion, the first conductive sheet and the second conductive sheet are no longer in contact with each other.

[0013] Furthermore, it also includes a clamping mechanism for clamping the metal conductor, the clamping mechanism includes an upper clamping member and a lower clamping member, the upper clamping member and the lower clamping member are respectively arranged in the fixed mold core and the movable mold core, and both are respectively pressed against the metal conductor.

[0014] Furthermore, the upper clamping member and the lower clamping member are provided at both ends of the upper edge of the first conductive sheet and the second conductive sheet close to the connecting portion;

[0015] The first conductive sheet and the second conductive sheet are both provided with a positioning hole near the connecting portion. The lower clamping member is provided with a positioning head which is inserted into the positioning hole. The upper clamping member is located above the positioning head.

[0016] Furthermore, the metal conductor further includes a third conductive sheet, a fourth conductive sheet and a fifth conductive sheet, and the third conductive sheet and the fourth conductive sheet are connected to each other as well as the fourth conductive sheet and the fifth conductive sheet are connected to each other via a connecting portion;

[0017] In which, the cutting mechanism is provided with a punching head above each of the connecting parts. When the driving block moves downward, all the connecting parts can be cut off so that the first conductive sheet, the second conductive sheet, the third conductive sheet, the fourth conductive sheet and the fifth conductive sheet do not contact each other.

[0018] Furthermore, the first conductive sheet and the second conductive sheet are respectively provided with a through hole, one of the through holes is directly opposite to the connecting portion between the third conductive sheet and the fourth conductive sheet, and the other through hole is directly opposite to the connecting portion between the fourth conductive sheet and the fifth conductive sheet;

[0019] The two punching heads are movably arranged in the two through holes respectively.

[0020] Furthermore, the sliding block is provided with a T-shaped block, the driving block is provided with a T-shaped slot, the T-shaped block is movably inserted into the T-shaped slot, and the T-shaped block and the T-shaped slot are gradually inclined downward from an end away from the driving cylinder to an end close to the driving cylinder;

[0021] Both sides of the driving block are provided with guide grooves along the height direction thereof, and the fixed template is provided with guide blocks corresponding to the guide grooves one by one, and the guide blocks are inserted into the guide grooves.

[0022] Furthermore, the plurality of sliders further include a second slider, a third slider and a fourth slider, the movable mold core is arranged in a square shape, and the first slider, the second slider, the third slider and the fourth slider are respectively arranged along the four sides of the movable mold core.

[0023] The present invention solves the technical problem by adopting a technical solution, which is to provide a molding method for molding a motor cover of a new energy vehicle, using the above-mentioned injection mold, and the injection mold further includes an ejection mechanism for ejecting the motor cover, and the ejection mechanism is movably provided on the movable mold. The molding method includes:

[0024] The metal conductor is detachably fixed to the positioning portion of the first slider, and the movable mold and the fixed mold are clamped, and the clamping mechanism clamps the metal conductor;

[0025] Plastic is injected into the cavity through the hot runner;

[0026] After a preset cooling time, the driving cylinder extends forward, thereby driving the sliding block to slide forward; the sliding block drives the driving block to move downward, and the punching head cuts off all the connecting parts, so that the first conductive sheet, the second conductive sheet, the third conductive sheet, the fourth conductive sheet, and the fifth conductive sheet are no longer in contact with each other;

[0027] The movable mold is separated from the fixed mold, and the plurality of slides are withdrawn and the core is pulled out, and the motor cover remains on the movable mold core;

[0028] The ejection mechanism ejects the motor cover.

[0029] Compared with the prior art, the present invention has at least the following beneficial effects:

[0030] In the present invention, the first and second conductive sheets are connected by a connecting portion, meaning they can be formed into an integral insert. This integral insert is placed in the injection mold before injection molding, allowing for coordinated positioning of the first and second conductive sheets. This effectively resolves the issue of inconvenient positioning and securing of either the first or second conductive sheet. Furthermore, coordinated positioning reduces the number of inserts, thereby simplifying the insert positioning and securing structure within the injection mold. After injection molding, the insert (i.e., the metal conductor) is integrally molded with the main body of the motor cover. A hydraulic cylinder drives the sliding block, which in turn drives the drive block downward, causing the punching head to move downward and sever the connecting portion. The previously conductively connected first and second conductive sheets are severed, leaving them in contact (i.e., non-conductive), thus meeting the product's functional requirements and preventing short circuits between the first and second conductive sheets. The motor cover is formed by integrally molding the sheet and then cutting it.

[0031] In the present invention, a set of upper clamps and lower clamps are respectively provided near the two ends of the connection part. When the punching head punches the connection part, the upper clamps and lower clamps respectively clamp the two ends of the connection part to ensure that the metal conductor does not shift. The two positioning heads on the lower clamp cooperate with the positioning holes on the first conductive sheet and the second conductive sheet to position the insert; and one end of both the first conductive sheet and the second conductive sheet can be detachably fixed to the fixed part of the first slider. When the punching head punches downward, the first slider does not pull the core backward. The first slider can not only assist in positioning the metal conductor, but also provide auxiliary support when punching the connection part to prevent the first conductive sheet and the second conductive sheet from deforming or shifting. The two lower clamps are respectively placed at the two ends of the connection part to ensure sufficient support strength when punching the connection part, and the molding quality of the product is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of the motor cover in the present invention;

[0033] Figure 2 for Figure 1 Structural diagram from another perspective;

[0034] Figure 3 is a schematic diagram of the structure of a metal conductor;

[0035] Figure 4 for Figure 3 Structural diagram from another perspective;

[0036] Figure 5 Schematic diagram of the overall structure of the injection mold of the present invention;

[0037] Figure 6 for Figure 5 Schematic diagram of the structure after removing the top plate, fixed plate and hot runner;

[0038] Figure 7 It is an assembly diagram of the cutting mechanism, ejection mechanism, movable mold core and fixed mold core;

[0039] Figure 8 Schematic diagram of the arrangement of the cutting mechanism, movable mold core, clamping mechanism and core pulling mechanism;

[0040] Figure 9 It is a structural schematic diagram of the clamping mechanism and the metal conductor;

[0041] Figure 10 is an exploded schematic diagram of the first conductive sheet, the second conductive sheet, the clamping mechanism, and the punching head;

[0042] Figure 11 is an exploded schematic diagram of the metal conductor, the second clamping member and the punching head;

[0043] Figure 12 It is a structural diagram of the cutting mechanism;

[0044] Figure 13 for Figure 12 Schematic diagram of the structure from another perspective.

[0045] In the picture:

[0046] 1. Motor cover; 10. Main body; 101. Connector; 11. Metal conductor; 111. First conductive sheet; 112. Second conductive sheet; 113. Connecting portion; 114. Third conductive sheet; 115. Fourth conductive sheet; 116. Fifth conductive sheet; 120. Positioning hole; 121. Through hole;

[0047] 2. Fixed mold; 20. Fixed mold plate; 21. Fixed mold core; 22. Hot runner; 201. Guide block;

[0048] 3. Moving mold; 30. Moving mold plate; 31. Moving mold core;

[0049] 4. Core pulling mechanism; 40. First slider; 401. Fixing portion; 41. Second slider; 42. Third slider; 43. Fourth slider;

[0050] 5. Cutting mechanism; 50. Driving cylinder; 51. Sliding block; 511. T-shaped block; 52. Driving block; 521. T-shaped slot; 53. Punching head; 531. Fixed block; 532. Guide insert;

[0051] 6. Clamping mechanism; 60. Upper clamping member; 61. Lower clamping member; 611. Positioning head;

[0052] 7. Ejection mechanism. DETAILED DESCRIPTION

[0053] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0054] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0055] In addition, in the present invention, descriptions such as "first," "second," and "one" are for descriptive purposes only and should not be understood to indicate or imply their relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0056] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0057] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0058] Example 1:

[0059] like Figure 1-Figure 2As shown, the motor cover 1 of this embodiment includes a main body 10 and a metal conductor 11 that is insert-molded integrally with the main body 10. The main body 10 is made of plastic. A connector 101 is provided on the main body 10. The metal conductor 11 includes a first conductive sheet 111, a second conductive sheet 112, and a connecting portion 113 connecting the first and second conductive sheets 111, 112. The first and second conductive sheets 111, 112 are connected by the connecting portion 113 to form a single unit that can be positioned and fixed in an injection mold as an insert. The first and second conductive sheets 111, 112 both extend into the connector 101 to facilitate connection to a power source.

[0060] like Figure 2-Figure 4 As shown, the metal conductor 11 further includes a third conductive sheet 114, a fourth conductive sheet 115, and a fifth conductive sheet 116. The third conductive sheet 114 and the fourth conductive sheet 115, as well as the fourth conductive sheet 115 and the fifth conductive sheet 116, are each connected via a connecting portion 113. Specifically, the first conductive sheet 111 and the second conductive sheet 112 are fixedly connected as a whole via the connecting portion 113; the third conductive sheet 114, the fourth conductive sheet 115, and the fifth conductive sheet 116 are fixedly connected as a whole via two connecting portions 113. Therefore, the metal conductor 11 comprises two separate parts, positioned and fixed in the injection mold as two inserts. Before the connecting portions 113 are punched, electrical conductivity exists between the first conductive sheet 111 and the second conductive sheet 112, and electrical conductivity exists between the third conductive sheet 114, the fourth conductive sheet 115, and the fifth conductive sheet 116. One end of the first conductive sheet 111, the second conductive sheet 112, the third conductive sheet 114, the fourth conductive sheet 115, and the fifth conductive sheet 116 all extend into the connector 101, facilitating power connection. In the connector 101, the first conductive sheet 111 and the second conductive sheet 112 are positioned above the third conductive sheet 114, the fourth conductive sheet 115, and the fifth conductive sheet 116. The first conductive sheet 111 is positioned in the gap between the third conductive sheet 114 and the fourth conductive sheet 115, and the second conductive sheet 112 is positioned in the gap between the fourth conductive sheet 115 and the fifth conductive sheet 116. This arrangement facilitates the placement of the punching head 53, preventing interference with the individual conductive sheets.

[0061] like Figure 5-Figure 8 As shown, the injection mold for forming the motor cover 1 of the new energy vehicle in this embodiment mainly includes: a fixed mold 2, a movable mold 3, a core pulling mechanism 4, a cutting mechanism 5, a clamping mechanism 6 and an ejection mechanism 7.

[0062] The fixed mold 2 comprises a fixed mold plate 20, a fixed mold core 21, and a hot runner 22. The fixed mold core 21 is mounted on the fixed mold plate 20, and the hot runner 22 extends through the fixed mold plate 20 and the fixed mold core 21. Specifically, as in conventional injection molds, the fixed mold plate 20 is provided with a groove for mounting the fixed mold core 21, which is removably fixedly mounted in the groove. A top plate is also provided on top of the fixed mold plate 20. The top plate, the fixed mold plate 20, and the fixed mold core 21 are provided with grooves for mounting the hot runner 22.

[0063] The movable mold 3 is movably disposed below the fixed mold 2. During the actual injection molding process, the fixed mold 2 is fixed to the head plate of the injection molding machine and is generally stationary. The movable mold 3 is fixed to the middle plate of the injection molding machine and needs to move relative to the fixed mold 2 during the mold opening process. The movable mold 3 includes a movable platen 30 and a movable mold core 31 disposed on the movable platen 30. The movable mold core 31 and the fixed mold core 21 are movably offset from each other. Similarly, a groove is provided on the movable platen 30 for mounting the movable mold core 31. The movable mold core 31 is removably fixedly mounted in the groove on the movable platen 30.

[0064] Several core-pulling mechanisms 4 are arranged along the circumference of the movable mold core 31 and the fixed mold core 21. The core-pulling mechanisms 4 can form side holes or side recesses on the motor cover 1, solving the problem of the motor cover 1 being undercut along the mold opening direction, which affects the normal mold opening. Specifically, the several sliders include a first slider 40, a second slider 41, a third slider 42, and a fourth slider 43. The movable mold core 31 is arranged in a square shape. The first slider 40, the second slider 41, the third slider 42, and the fourth slider 43 are respectively arranged along the four sides of the movable mold core 31. The fixed mold core 21, the movable mold core 31, and the multiple sliders around it form a cavity for forming the motor cover 1. Its hot runner 22 is sequentially arranged in the top plate, the fixed mold plate 20, and the fixed mold core 21, and the hot runner 22 is connected to the cavity. The metal conductor 11 is arranged in the cavity. During the injection molding process, the molten plastic enters the hot runner 22 and flows into the mold cavity. After cooling, the metal conductor 11 forms an integrated structure with the plastic, which is reliably fixed. There is no need to set a complex positioning and fixing structure derived from the post-installed metal conductor 11 on the main body 10.

[0065] The first slider 40 is used to form the connector 101 on the motor cover 1. A fixing portion 401 is provided on the first slider 40. One end of each of the first conductive sheet 111 and the second conductive sheet 112 is removably fixed to the fixing portion 401. Specifically, one end of the third conductive sheet 114, the fourth conductive sheet 115, and the fifth conductive sheet 116 is also removably fixed to the fixing portion 401. During the actual forming process, the first slider 40 not only assists in positioning the metal conductor 11 but also provides auxiliary support when punching the connecting portion 113 to prevent deformation or displacement of the first conductive sheet 111, the second conductive sheet 112, the third conductive sheet 114, the fourth conductive sheet 115, and the fifth conductive sheet 116. After the punching head 53 cuts the connecting portion 113, the first slider 40 moves away from the metal conductor 11 to perform core extraction, and the first conductive sheet 111, the second conductive sheet 112, the third conductive sheet 114, the fourth conductive sheet 115, and the fifth conductive sheet 116 are all detached from the fixing portion 401.

[0066] like Figure 8 and Figure 12-13 As shown, the cutting mechanism 5 includes a driving cylinder 50, a sliding block 51, a driving block 52 and a punching head 53. The sliding block 51 is arranged on the fixed plate 20. A limit block is provided on the fixed plate 20 to limit the maximum sliding distance of the sliding block 51 to prevent the sliding block 51 from moving too far and causing the punching head 53 to move downward too far. The limit block is detachably fixed to the fixed plate 20. The telescopic shaft of the driving cylinder 50 is connected to the sliding block 51 and can drive the sliding block 51 to slide. Linear guide rails are provided on both sides of the sliding block 51. A wear-resistant plate is provided on the fixed plate 20. The wear-resistant plate is detachably connected to the fixed plate 20 to facilitate disassembly and replacement. A guide groove is provided on the wear-resistant plate, and the linear guide rail is movably inserted into the guide groove. The punching head 53 is fixedly connected to the driving block 52, and the lower end of the punching head 53 movably extends into the mold cavity. In this embodiment, the three punching heads 53 are detachably fixed to the driving block 52 via a fixing block 531, facilitating quick replacement of the three punching heads 53. The driving block 52 is movably connected to the sliding block 51, and the sliding block 51 can drive the driving block 52 to move up and down, so that the punching head 53 can cut the connecting portion 113.

[0067] Specifically, the sliding block 51 is provided with a T-shaped block 511, and the driving block 52 is provided with a T-shaped slot 521. The T-shaped block 511 is movably inserted into the T-shaped slot 521. The T-shaped block 511 and the T-shaped slot 521 are gradually inclined downward from the end away from the driving cylinder 50 to the end close to the driving cylinder 50. The cooperation between the T-shaped block 511 and the T-shaped slot 521 prevents the driving block 52 from being easily separated from the sliding block 51. During use, the telescopic shaft of the driving cylinder 50 extends forward, driving the sliding block 51 forward. Under the cooperation of the T-shaped block 511 and the T-shaped slot 521, the driving block 52 moves downward, and the punching head 53 performs a downward punching action. Among them, guide grooves are provided on both sides of the driving block 52 along its height direction, and guide blocks 201 corresponding to the guide grooves are provided on the fixed template 20. The guide blocks 201 are inserted into the guide grooves, and the guide blocks 201 cooperate with the guide grooves to ensure that the lifting and lowering movement of the driving block 52 is reliable.

[0068] During the actual injection molding and punching process, the first conductive sheet 111 and the second conductive sheet 112 of this embodiment are connected by the connecting portion 113. That is, the first conductive sheet 111 and the second conductive sheet 112 can be made into an integral insert. Before injection molding, the first conductive sheet 111 and the second conductive sheet 112 can be placed in the injection mold as an integral insert. This allows for coordinated positioning of the first conductive sheet 111 and the second conductive sheet 112, effectively resolving the problem of inconvenient positioning and fixing of the first conductive sheet 111 or the second conductive sheet 112. Furthermore, coordinated positioning can reduce the number of inserts, thereby simplifying the positioning and fixing structure of the inserts in the injection mold. After injection molding, the insert (i.e., the metal conductor 11) is integrally molded with the main body of the motor cover 1. The driving cylinder 50 drives the sliding block 51 to slide, thereby driving the driving block 52 downward, causing the punching head 53 to move downward and cut the connecting portion 113. The first conductive sheet 111 and the second conductive sheet 112 that were originally conductively connected are cut off, and the first conductive sheet 111 and the second conductive sheet 112 are not in contact with each other (i.e., non-conductive) to meet the functional requirements of the product and prevent the first conductive sheet 111 and the second conductive sheet 112 from being short-circuited. That is, in this embodiment, the motor cover 1 is formed by first integral injection molding and then cutting.

[0069] like Figures 9-11 As shown, the injection mold further includes a clamping mechanism 6 for clamping the metal conductor 11. The clamping mechanism 6 includes an upper clamping member 60 and a lower clamping member 61. The upper clamping member 60 and the lower clamping member 61 are respectively disposed in the fixed mold core 21 and the movable mold core 31, and each of the upper clamping members 60 and the lower clamping member 61 abut against the metal conductor 11. There are multiple upper clamping members 60 and lower clamping members 61. Each conductive sheet is provided with multiple upper clamping members 60 and multiple lower clamping members 61 along the direction in which its outer shape extends, ensuring that the conductive sheets do not shift or deform during the molding and punching processes.

[0070] In this embodiment, a group of upper clamping members 60 and lower clamping members 61 are respectively provided near the two ends of the connecting portion 113. During the process of punching the connecting portion 113 by the punching head 53, the upper clamping members 60 and the lower clamping members 61 clamp the two ends of the connecting portion 113 respectively to ensure that the metal conductor 11 will not be displaced.

[0071] Taking the first conductive sheet 111 and the second conductive sheet 112 as an example, an upper clamping member 60 and a lower clamping member 61 are provided at both ends of the upper edge of the first conductive sheet 111 and the second conductive sheet 112 near the connection portion 113. Both the first conductive sheet 111 and the second conductive sheet 112 are provided with a positioning hole 120 near the connection portion 113, and a positioning head 611 is provided on the lower clamping member 61. The positioning head 611 is inserted into the positioning hole 120, and the upper clamping member 60 is located above the positioning head 611. In actual molding and punching, the two lower clamping members 61 at both ends of the connection portion 113 are respectively placed under the two ends of the connection portion 113. When punching the connection portion 113, sufficient support strength is ensured, and the first conductive sheet 111 and the second conductive sheet 112 will not be deformed during the punching process of the connection portion 113, resulting in high molding quality of the product.

[0072] The third conductive sheet 114, the fourth conductive sheet 115, and the fifth conductive sheet 116 are integrally formed inserts, connected by two connecting portions 113. Their fitting structure within the injection mold is similar to that of the first conductive sheet 111 and the second conductive sheet 112. The cutting mechanism 5 includes a punching head 53 positioned above each connecting portion 113. When the driving block 52 moves downward, it severs all connecting portions 113, thereby preventing contact between the first conductive sheet 111, the second conductive sheet 112, the third conductive sheet 114, the fourth conductive sheet 115, and the fifth conductive sheet 116. This means that the five conductive sheets are insulated and non-conductive, preventing short circuits.

[0073] Preferably, a through hole 121 is provided on each of the first conductive sheet 111 and the second conductive sheet 112. One through hole 121 faces the connection portion 113 between the third conductive sheet 114 and the fourth conductive sheet 115, and the other through hole 121 faces the connection portion 113 between the fourth conductive sheet 115 and the fifth conductive sheet 116. Two punching heads 53 are movably disposed in the two through holes 121. That is, the two punching heads respectively penetrate the first conductive sheet 111 and the second conductive sheet 112 to punch the connection portion 113 between the third conductive sheet 114 and the fourth conductive sheet 115, and the connection portion 113 between the fourth conductive sheet 115 and the fifth conductive sheet 116.

[0074] The working principle of the injection mold in this embodiment is as follows: first, the metal conductor 11 is positioned as an insert in the mold cavity, and the movable mold 3 moves toward the fixed mold 2 to close the mold. All sliders are reset. At this time, the metal conductor 11 is detachably fixed by the first slider 40 and clamped by the upper clamp 60 and the lower clamp 61. Molten plastic is injected from the hot runner 22 into the mold cavity, filling the mold cavity. After cooling for a preset time, the metal conductor 11 and the main body 10 are formed into one piece. The driving cylinder 50 extends forward, driving the sliding block 51 to move forward. The sliding block 51 drives the driving block 52 to move downward, thereby causing the punching head 53 to cut off the connecting portion 113, so that the first conductive sheet 111, the second conductive sheet 112, the third conductive sheet 114, the fourth conductive sheet 115, and the fifth conductive sheet 116 are no longer in contact with each other. The movable mold 3 moves downward relative to the fixed mold 2 to open the mold. At the same time, the sliders move backward to pull the core. The upper clamping member 60 and the lower clamping member 61 no longer cooperate to clamp the metal conductor 11, and the motor cover 1 remains on the movable mold 3. The ejection mechanism 7 moves upward to eject the motor cover 1 from the movable mold 3, and the motor cover 1 is formed.

[0075] Example 2:

[0076] A molding method for molding a motor cover plate 1 for a new energy vehicle, wherein the motor cover plate 1 is molded using the injection mold of the first embodiment, and the molding method comprises:

[0077] Step 1: The metal conductor 11 is removably fixed to the positioning portion of the first slider 40, and the metal conductor 11 is positioned in the cavity of the injection mold. The movable mold 3 and the fixed mold 2 are closed, and the clamping mechanism 6 clamps the metal conductor 11, completing the positioning and fixing of the metal conductor 11.

[0078] Step 2: The molten plastic is injected into the mold cavity through the hot runner 22.

[0079] Step 3: After the preset cooling time, the driving cylinder 50 extends forward, thereby driving the sliding block 51 to slide forward; the sliding block 51 drives the driving block 52 to move downward, and the punching head 53 cuts off all the connecting parts 113, so that the first conductive sheet 111, the second conductive sheet 112, the third conductive sheet 114, the fourth conductive sheet 115 and the fifth conductive sheet 116 are no longer in contact with each other.

[0080] Step 4: The movable mold 3 is separated from the fixed mold 2, and several slides retreat and pull the core, and the motor cover 1 remains on the movable mold core 31.

[0081] Step 5: The ejection mechanism 7 ejects the motor cover 1.

[0082] The motor cover 1 is manufactured by repeating these five steps.

[0083] In this solution, when the motor cover plate 1 of the new energy vehicle is formed, the metal conductor 11 is conveniently positioned and fixed, and the forming position accuracy of the metal conductor 11 is high. Forming first and then punching can solve the problem of inconvenient positioning and fixing of the metal conductor 11 in the injection mold.

Claims

1. An injection mold for forming a motor cover for a new energy vehicle, the motor cover comprising a main body and a metal conductor integrally insert-molded with the main body, the main body having a joint, the metal conductor comprising a first conductive sheet, a second conductive sheet, and a connecting portion connected between the first conductive sheet and the second conductive sheet, the first conductive sheet and the second conductive sheet both extending into the joint; the metal conductor further comprising a third conductive sheet, a fourth conductive sheet, and a fifth conductive sheet, the third conductive sheet and the fourth conductive sheet, as well as the fourth conductive sheet and the fifth conductive sheet, respectively being connected via a connecting portion; in the joint, the first conductive sheet and the second conductive sheet are located above the third conductive sheet, the fourth conductive sheet, and the fifth conductive sheet; characterized in that The injection mold comprises: The fixed mold comprises a fixed mold plate, a fixed mold core and a hot runner, wherein the fixed mold core is arranged on the fixed mold plate, and the hot runner is passed through the fixed mold plate and the fixed mold core; A movable mold is movably arranged below the fixed mold, comprising a movable mold plate and a movable mold core arranged on the movable mold plate, wherein the movable mold core and the fixed mold core are movably offset from each other; A plurality of core-pulling mechanisms are arranged along the circumference of the movable mold core and the fixed mold core, and include a plurality of sliders. The fixed mold core, the movable mold core, and the plurality of sliders form a cavity for molding the motor cover. The hot runner is connected to the cavity, and the metal conductor is disposed in the cavity. The plurality of sliders include a first slider for molding the joint. The first slider is provided with a fixing portion, and one end of each of the first conductive sheet, the second conductive sheet, the third conductive sheet, the fourth conductive sheet, and the fifth conductive sheet can be detachably fixed to the fixing portion. The cutting mechanism includes a driving cylinder, a sliding block, a driving block and a punching head, wherein the sliding block is arranged on the fixed template; the telescopic shaft of the driving cylinder is connected to the sliding block and can drive the sliding block to slide; the punching head is fixedly connected to the driving block, and the lower end of the punching head movably extends into the mold cavity; the driving block is movably connected to the sliding block, and the sliding block can drive the driving block to move up and down so that the punching head can cut off the connecting portion; the punching head is provided along the upper side of each connecting portion in the cutting mechanism; It also includes a clamping mechanism for clamping the metal conductor, the clamping mechanism includes an upper clamping member and a lower clamping member, the upper clamping member and the lower clamping member are respectively disposed in the fixed mold core and the movable mold core, and the two clamping members respectively abut against the metal conductor; The first conductive sheet and the second conductive sheet are each provided with a through hole, one of the through holes facing the connection portion between the third conductive sheet and the fourth conductive sheet, and the other through hole facing the connection portion between the fourth conductive sheet and the fifth conductive sheet; the two punching heads are respectively movably provided in the two through holes; When the punching head punches downward, the first slider assists in positioning the metal conductor and provides auxiliary support when punching the connecting portion, and the two lower clamping members are respectively placed at both ends of the connecting portion to provide support when punching the connecting portion.

2. The injection mold for forming a motor cover for a new energy vehicle according to claim 1, characterized in that: After the punching head cuts off the connecting portion, the first slider moves to a side away from the metal conductor, and the first conductive sheet and the second conductive sheet are separated from the fixing portion.

3. The injection mold for forming a motor cover for a new energy vehicle according to claim 2, characterized in that: After the punching head cuts off the connecting portion, the first conductive sheet and the second conductive sheet are no longer in contact with each other.

4. The injection mold for forming a motor cover for a new energy vehicle according to claim 1, characterized in that: The upper clamping member and the lower clamping member are provided at both ends of the first conductive sheet and the second conductive sheet close to the connecting portion; The first conductive sheet and the second conductive sheet are both provided with a positioning hole near the connecting portion. The lower clamping member is provided with a positioning head which is inserted into the positioning hole. The upper clamping member is located above the positioning head.

5. The injection mold for forming a motor cover for a new energy vehicle according to claim 4, characterized in that: When the driving block moves downward, all the connecting parts can be cut off so that the first conductive sheet, the second conductive sheet, the third conductive sheet, the fourth conductive sheet and the fifth conductive sheet do not contact each other.

6. The injection mold for forming a motor cover for a new energy vehicle according to claim 1, characterized in that: The sliding block is provided with a T-shaped block, and the driving block is provided with a T-shaped slot. The T-shaped block is movably inserted into the T-shaped slot, and the T-shaped block and the T-shaped slot are gradually inclined downward from an end away from the driving cylinder to an end close to the driving cylinder. Both sides of the driving block are provided with guide grooves along the height direction thereof, and the fixed template is provided with guide blocks corresponding to the guide grooves one by one, and the guide blocks are inserted into the guide grooves.

7. The injection mold for forming a motor cover for a new energy vehicle according to claim 1, characterized in that: The plurality of sliders further include a second slider, a third slider and a fourth slider. The movable mold core is arranged in a square shape. The first slider, the second slider, the third slider and the fourth slider are respectively arranged along the four sides of the movable mold core.

8. A method for forming a motor cover for a new energy vehicle, comprising: forming the motor cover by using the injection mold according to any one of claims 1 to 7; wherein the injection mold further comprises an ejection mechanism for ejecting the motor cover, the ejection mechanism being movably disposed on the movable mold; and wherein: The molding method comprises: The metal conductor is detachably fixed to the positioning portion of the first slider, and the movable mold and the fixed mold are clamped, and the clamping mechanism clamps the metal conductor; Plastic is injected into the cavity through the hot runner; After a preset cooling time, the driving cylinder extends forward, thereby driving the sliding block to slide forward; the sliding block drives the driving block to move downward, and the punching head cuts off all the connecting parts, so that the first conductive sheet, the second conductive sheet, the third conductive sheet, the fourth conductive sheet, and the fifth conductive sheet are no longer in contact with each other; The movable mold is separated from the fixed mold, and the plurality of slides are withdrawn and the core is pulled out, and the motor cover remains on the movable mold core; The ejection mechanism ejects the motor cover.

Images