A curved mobile phone back cover integrated extrusion forming device

Abstract

The present application relates to the technical field of curved back cover stamping processing, and particularly relates to a curved mobile phone back cover integrated extrusion forming device. The device comprises an extruder, a female die set and a male die set. The upper side of the male die set is slidably connected with a material removal frame. The material removal frame is provided with a plurality of installation frames. The installation frames are slidably connected with sliding blocks and transmission columns. Return tension springs are fixedly connected between the transmission columns and adjacent installation frames. The sliding blocks are provided with hinged columns. The hinged columns are hingedly connected with hinged arms between the corresponding transmission columns. The die set is closed to the male die set by the die closing action, so that all the transmission columns of the die set move together. The transmission columns move the sliding blocks through the hinged arms, so that the area of the rectangular frame surrounded by all the sliding blocks is reduced. The material plate inside the rectangular frame is positioned and adjusted. The distance between the die set and the male die set does not need to consider the influence on the line of sight. The distance between the die set and the male die set is shortened, so that the processing time of single processing is shortened and the processing rate is improved.

Description

Technical Field

[0001] This invention relates to the field of curved back cover stamping technology, and in particular to an integrated extrusion molding apparatus for curved mobile phone back covers. Background Technology

[0002] Extrusion molding is a plastic processing method that applies pressure to a material, causing it to plastically deform in a mold to obtain the desired shape. In the production of curved mobile phone back covers, a stamping press uses stamping or hot pressing processes to plastically deform a flat metal sheet, thereby precisely forming it into the specific curved back cover structure required by the mobile phone. During the stamping process, existing technologies place the sheet metal on the upper surface of the fixed die of the stamping press using grippers or manual methods, and use visual inspection to detect and adjust the position of the sheet metal. Then, the moving die moves down, and the moving and fixed dies cooperate to stamp the sheet metal into a back cover of a specific shape. Afterward, the moving and fixed dies separate, and the back cover is removed to complete the processing and shaping. In the above processing, because the position of the sheet metal needs to be determined by visual inspection during the placement of the sheet metal, and the distance between the moving and fixed dies is usually large to avoid obstructing the view, the moving die travels a long distance to complete a single processing of the mobile phone back cover, resulting in a long processing time per cycle and restricting the improvement of processing speed. Summary of the Invention

[0003] This invention provides an integral extrusion molding device for curved mobile phone back covers, which overcomes the shortcomings of existing stamping machines in processing curved mobile phone back covers, such as long single stamping time and low processing speed due to the large distance between the moving and fixed dies.

[0004] Technical Solution: A curved mobile phone back cover integrated extrusion molding device, comprising: an extruder, a die assembly, and a punch assembly. Both the die assembly and the punch assembly are mounted on the extruder. The die assembly is located above the punch assembly. A stripper frame is slidably connected to the upper side of the punch assembly. A return spring is fixedly connected between the stripper frame and the punch assembly. Several mounting frames are provided on the stripper frame. Sliding blocks and transmission columns are slidably connected to the mounting frames. The sliding blocks are used to position the material plate. The sliding directions of the sliding blocks and the transmission columns are perpendicular to each other. The die assembly is used to drive the transmission columns. Clearance holes are provided at positions corresponding to all the sliding blocks in the die assembly. A return tension spring is fixedly connected between the transmission column and the adjacent mounting frame. The sliding blocks are provided with hinge columns, and hinge arms are hinged between the hinge columns and the corresponding transmission columns.

[0005] Furthermore, the unloading frame is provided with two sets of symmetrically distributed fixed through slots, two sets of symmetrically distributed positioning through slots, and two sets of symmetrically distributed limiting through slots. The fixed through slots, positioning through slots, and limiting through slots have the same shape. The number of mounting frames is equal to the sum of the number of fixed through slots, positioning through slots, and limiting through slots. Each set of fixed through slots consists of two symmetrically distributed slots.

[0006] Furthermore, a locking bolt is threaded onto the upper side of the sliding block, and a positioning post is fitted onto the locking bolt. The positioning post is used to press the material plate, and a retaining spring is placed between the positioning post and the corresponding locking bolt. The positioning post abuts against the corresponding sliding block.

[0007] Furthermore, the upper side of the sliding block is provided with a frustum portion, the shape of the lower side of the positioning post matches the shape of the corresponding frustum portion, the periphery of the frustum portion is provided with uniformly distributed strip grooves, and the lower side of the positioning post is provided with a protruding ridge for embedding in the strip grooves.

[0008] Furthermore, a locking block is slidably connected inside the sliding block. The locking block is hemispherical near the position corresponding to the locking bolt. The locking bolt is used to press the corresponding locking block, and the locking block is used to press the corresponding mounting frame and limit the sliding block.

[0009] Furthermore, the sliding block is provided with a sliding groove near the position corresponding to the hinge post, and the hinge post slides within the corresponding sliding groove. A magnetic post is embedded in the sliding groove near the position corresponding to the transmission post, and the magnetic post is used to attract the corresponding hinge post.

[0010] Furthermore, the fixed through groove is parallel to the length direction of the positioning through groove, the distance between the two positioning through grooves is less than the distance between the two fixed through grooves that are symmetrically distributed in different groups of fixed through grooves, the fixed through groove is located between the positioning through groove and the limiting through groove, and the distance between the two limiting through grooves gradually increases in the direction from the positioning through groove to the fixed through groove on the stripping frame.

[0011] Furthermore, an adjustment frame is slidably connected to the upper side of the transmission column, the concave die is used to press the adjustment frame, and the adjustment frame is threadedly connected to an adjustment knob that abuts against the corresponding transmission column.

[0012] Furthermore, a protrusion is provided on the side of the mounting frame away from the corresponding transmission column. The protrusion is used to embed into the stripping frame. The length of the fixing groove is not less than the length of the mounting frame. A fixing knob is threadedly connected to the outer periphery of the stripping frame near all the mounting frames. The fixing knob abuts against the corresponding mounting frame to fix the mounting frame.

[0013] Furthermore, the stripping frame is provided with a guide slope near the limiting groove.

[0014] In summary, this application includes at least one of the following beneficial technical effects: The present invention relies on the mold closing action of the die assembly moving closer to the punch assembly, causing all the transmission columns of the die assembly to move together. The transmission columns drive the sliding blocks to move through the hinged arms, reducing the area of ​​the rectangular frame formed by all the sliding blocks, thereby positioning and adjusting the material plate inside. In this way, the distance between the die assembly and the punch assembly does not need to consider the impact on the line of sight, shortening the distance between the die assembly and the punch assembly, thereby shortening the processing time of a single operation and increasing the processing speed.

[0015] By rotating the positioning pin, the contact position between the positioning pin and the material plate is changed, thereby reducing the positioning deviation caused by wear, maintaining the positioning accuracy of the material plate, and thus improving the quality of the finished product.

[0016] By controlling the limiting relationship between the sliding block and the mounting frame, it is possible to prevent some sliding blocks from moving. Using the position of these sliding blocks as a reference, the positioning accuracy of the material plate is ensured by the squeezing of the material plate by the remaining sliding blocks, thus reducing the positioning deviation caused by the wear and tear of moving parts. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the concave die assembly and the convex die assembly of the present invention; Figure 3 This is a three-dimensional structural diagram of the concave die assembly and stripper frame of the present invention; Figure 4 This is a three-dimensional structural diagram of the unloading frame and the mounting frame of the present invention; Figure 5 This is a three-dimensional structural diagram of the sliding block and transmission column of the present invention; Figure 6 This is a three-dimensional structural cross-sectional view of the transmission column and positioning column of the present invention; Figure 7 This is a three-dimensional structural cross-sectional view of the sliding block and positioning column of the present invention; Figure 8 This is a three-dimensional structural diagram of the locking bolt and locking block of the present invention.

[0018] In the diagram: 1. Extruder, 2. Die assembly, 201. Clearance hole, 3. Punch assembly, 4. Stripper frame, 401. Fixing through groove, 402. Positioning through groove, 403. Limiting through groove, 404. Guide slope, 5. Return spring, 6. Mounting frame, 601. Protrusion, 7. Sliding block, 701. Frustum, 702. Strip groove, 8. Hinge column, 801. Sliding groove, 9. Transmission column, 10. Return tension spring, 11. Hinge arm, 12. Fixing knob, 13. Locking bolt, 14. Positioning column, 15. Positioning spring, 16. Locking block, 17. Magnetic column, 18. Adjusting bracket, 19. Adjusting knob. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] Example 1: This example discloses an integrated extrusion molding device for curved mobile phone back covers, which solves the problem that existing stamping machines have long single stamping time and low processing speed in the process of processing curved mobile phone back covers due to the large distance between the moving and fixed dies.

[0021] See Figures 1 to 7 A curved mobile phone back cover integral extrusion molding device includes: an extruder 1, a die assembly 2, and a punch assembly 3. The die assembly 2 consists of a die and a movable mounting plate, and the punch assembly 3 consists of a punch and a fixed mounting plate. Both the die assembly 2 and the punch assembly 3 are prior art and are not shown in detail in the accompanying drawings. Both the die assembly 2 and the punch assembly 3 are mounted on the extruder 1, with the die assembly 2 located above the punch assembly 3. A stripper frame 4 is slidably connected to the upper side of the punch assembly 3. The stripper frame 4 has a through groove in its middle that matches the shape of the punch of the punch assembly 3. In the unprocessed state, the upper side of the stripper frame 4 is coplanar with the upper side of the punch on the punch assembly 3. A return spring 5 is fixedly connected between the stripper frame 4 and the punch assembly 3 to maintain the relative position of the stripper frame 4 and the punch assembly 3. The stripping frame 4 is provided with several mounting frames 6, and there are eight mounting frames 6 in this paper. The mounting frames 6 are slidably connected with sliding blocks 7 and transmission columns 9. The sliding blocks 7 on the same mounting frame 6 are closer to the center of the stripping frame 4 than the transmission columns 9. The sliding blocks 7 are used to position the material plate. The sliding blocks 7 slide in the horizontal direction relative to the mounting frames 6, and the transmission columns 9 slide in the vertical direction relative to the mounting frames 6. The die cavity of the die cavity group 2 is provided with clearance holes 201 at the positions corresponding to the eight sliding blocks 7. The die cavity group 2 is used to drive the transmission columns 9 to move. The transmission columns 9 are fixedly connected to the lower side of the adjacent mounting frames 6 with a reset tension spring 10. The sliding blocks 7 are provided with hinge columns 8. The hinge columns 8 and the corresponding transmission columns 9 are hinged with hinge arms 11.

[0022] The above setup enables the following: by relying on the mold closing action of the die assembly 2 moving closer to the punch assembly 3, all the transmission columns 9 of the die assembly 2 are moved together. The transmission columns 9 move the sliding blocks 7 through the hinge arm 11, thereby reducing the area of ​​the rectangular frame formed by all the sliding blocks 7, and thus positioning and adjusting the material plate inside. In this way, the distance between the die assembly 2 and the punch assembly 3 does not need to consider the impact on the line of sight, shortening the distance between the die assembly 2 and the punch assembly 3, thereby shortening the processing time of a single operation and increasing the processing speed.

[0023] It should be noted that in this embodiment, the sliding block 7 and the hinged column 8 can be regarded as a fixed connection. The sliding block 7 is used to contact and squeeze the edge of the material plate, and the concave die group 2 directly squeezes the transmission column 9.

[0024] See Figure 4 The unloading frame 4 is provided with two sets of fixed through slots 401, two positioning through slots 402, and two limiting through slots 403 that are symmetrically distributed on the left and right. The fixed through slots 401, positioning through slots 402, and limiting through slots 403 are identical in shape. The number of mounting frames 6 is equal to the sum of the number of fixed through slots 401, positioning through slots 402, and limiting through slots 403. All mounting frames 6 are located in the corresponding fixed through slots 401, the corresponding positioning through slots 402, or the corresponding limiting through slots 403. Each set of fixed through slots 401 consists of two that are symmetrically distributed front and back.

[0025] It should be noted that in this embodiment, the length directions of the positioning through groove 402 and the limiting through groove 403 are both located in the front-back direction, and the length direction of the fixing through groove 401 is both located in the left-right direction.

[0026] See Figure 4 and Figure 5 A protrusion 601 is provided on the side of the mounting frame 6 away from the corresponding transmission column 9. The protrusion 601 is used to embed into the stripping frame 4. The length of the fixing groove 401 is not less than the length of the mounting frame 6, so that the mounting frame 6 can be inserted into the fixing groove 401 in the vertical direction. Then, the mounting frame 6 is controlled to slide along the length direction of the corresponding fixing groove 401 to embed the protrusion 601 into the stripping frame 4. A fixing knob 12 is threadedly connected to the outer periphery of the stripping frame 4 near all the mounting frames 6. The fixing knob 12 abuts against the corresponding mounting frame 6 to fix the mounting frame 6.

[0027] The stamping process for curved mobile phone back covers is as follows: The material plate is placed in a rectangular frame formed by eight sliding blocks 7. Then, the extruder 1 is started, and the die assembly 2 moves down. The die assembly 2 gradually approaches the transmission column 9 until it contacts the transmission column 9. As the die assembly 2 continues to move down, it squeezes the transmission column 9 to move and stretches the corresponding reset spring 10. The transmission column 9 drives the sliding blocks 7 to move through the corresponding hinge arm 11, reducing the area of ​​the rectangle formed by the eight sliding blocks 7. The eight sliding blocks 7 contact the material plate in sequence and push the material plate to move, adjusting the position of the material plate. At the same time, the eight sliding blocks 7 gradually enter the corresponding clearance holes 201 and slide within the corresponding clearance holes 201.

[0028] When all eight sliding blocks 7 are in contact with the material plate, the position of the material plate is determined. At this time, the die of the die group 2 contacts the edge of the material plate and squeezes it. The die of the die group 2 moves down the stripping frame 4 by squeezing the material plate and compresses the return spring 5, so that the punch of the punch group 3 gradually protrudes from the through groove in the middle of the stripping frame 4 and cooperates with the die of the die group 2 to change the shape of the material plate until the material plate is completely wrapped around the surface of the punch of the punch group 3, thus completing the shaping of the material plate.

[0029] When the material plate completely covers the surface of the punch of the punch assembly 3, the material plate also completely enters the cavity of the die assembly 2. The lower side of the die loses contact with the material plate. At this time, the stripper frame 4 moves up quickly under the push of the return spring 5 and fits against the lower side of the die assembly 2. During this process, the transmission column 9 moves down relative to the stripper frame 4 until the stripper frame 4 and the upper side of the transmission column 9 are coplanar. At this time, the transmission column 9 moves to the limit position relative to the stripper frame 4.

[0030] The extruder 1 controls the die assembly 2 to move upward. The stripper frame 4 moves along with the die assembly 2 under the action of the return spring 5. During the movement, the stripper frame 4 squeezes the lower edge of the back cover, causing the formed back cover to gradually detach from the punch of the punch assembly 3. Until the stripper frame 4 is reset relative to the punch assembly 3, the back cover is completely detached from the punch assembly 3. As the die assembly 2 continues to move upward, the distance between the die assembly 2 and the stripper frame 4 gradually increases. The transmission column 9 gradually moves upward and resets relative to the stripper frame 4 under the pulling force of the corresponding return spring 10. At the same time, the back cover falls from the die assembly 2 onto the upper side of the punch assembly 3 and the stripper frame 4, and the back cover is removed. Thus, the processing of a single mobile phone back cover is completed.

[0031] Example 2 is an optimization based on Example 1.

[0032] See Figures 6 to 8 The upper side of the sliding block 7 is threaded with a locking bolt 13, and the locking bolt 13 is fitted with a positioning post 14. The positioning post 14 is used to press the material plate. A positioning spring 15 is placed between the positioning post 14 and the corresponding locking bolt 13. The positioning post 14 abuts against the corresponding sliding block 7.

[0033] The above settings can achieve the following: by rotating the positioning column 14, the contact position between the positioning column 14 and the material plate is changed, thereby reducing the positioning deviation caused by wear, maintaining the positioning accuracy of the material plate, and thus improving the quality of the finished product.

[0034] See Figure 6 The upper side of the sliding block 7 is provided with a frustum 701. The diameter of the frustum 701 gradually decreases from bottom to top. The lower part of the positioning post 14 is provided with a frustum groove that matches the shape of the frustum 701. The height of the frustum groove on the lower side of the positioning post 14 is greater than the height of the frustum 701. This allows the positioning post 14 to be adjusted to a coaxial state with the sliding block 7 during the process of sitting on the frustum 701, guided by the frustum 701 and the frustum groove (refer to the cones stacked on the road and the stacked plastic chairs). The periphery of the frustum 701 is provided with evenly distributed strip grooves 702. The lower side of the positioning post 14 is provided with a protrusion for embedding in the strip groove 702. When the positioning post 14 is in contact with the sliding block 7, the protrusion of the positioning post 14 is embedded in the corresponding strip groove 702, preventing the positioning post 14 from deviating relative to the sliding block 7.

[0035] The above configuration enables the following: by cooperating with the frustum 701 and the lower frustum groove of the positioning post 14, the positioning post 14 is guided to be coaxial with the corresponding sliding block 7. With the help of the convex edge of the positioning post 14 and the embedded state of the strip groove 702, the relative state between the positioning post 14 and the sliding block 7 remains unchanged during the process of the positioning post 14 pushing the material plate, thus maintaining the positioning accuracy of the material plate.

[0036] See Figure 7 and Figure 8 Two symmetrically distributed locking blocks 16 are slidably connected inside the sliding block 7. The locking block 16 is hemispherical near the corresponding locking bolt 13. The locking bolt 13 is used to press the hemisphere of the corresponding locking block 16, and the locking block 16 is used to press the corresponding mounting frame 6 and limit the sliding block 7.

[0037] The above settings can achieve the following: by controlling the limiting relationship between the sliding block 7 and the mounting frame 6, the local sliding block 7 can be controlled to stop moving. Thus, based on the position of this part of the sliding block 7, the positioning accuracy of the material plate is guaranteed by the squeezing of the material plate by the other sliding blocks 7, thereby reducing the positioning deviation caused by the movement and wear of parts.

[0038] See Figure 7 and Figure 8A sliding groove 801 is provided near the corresponding hinge post 8 of the sliding block 7. The hinge post 8 slides within the corresponding sliding groove 801. A magnetic post 17 is embedded near the corresponding transmission post 9 of the sliding groove 801. The magnetic post 17 is used to attract the corresponding hinge post 8. The magnetic attraction between the magnetic post 17 and the hinge post 8 is used to enable the hinge post 8 to drive the corresponding sliding block 7 to move. On the other hand, it can maintain the pressing force of the positioning post 14 on the material plate after the positioning post 14 contacts the material plate and the hinge post 8 separates from the magnetic post 17. The sliding groove 801 provides sliding space for the hinge post 8. This ensures that the positioning of the material plate is completed before the concave die 2 contacts the material plate and does not affect the continued movement of the concave die 2.

[0039] Before processing, adjust the positions of the three positioning posts 14 on the left front side, that is, the positioning posts 14 corresponding to the two fixed through slots 401 and the one positioning through slot 402 on the left side, so that they are moved to the positions corresponding to the ideal positions of the material plate. Then, use a tool to rotate the three locking bolts 13 on the left front side in sequence, so that the locking bolts 13 press the corresponding locking blocks 16. The locking blocks 16 slide out of the corresponding sliding blocks 7 and abut against the corresponding mounting frame 6, limiting the sliding blocks 7. In this way, using the three positioning posts 14 on the left front side as a reference, repeat the steps of Example 1 in the subsequent stamping process. The remaining five positioning posts are used as references. As the column 14 pushes the material plate to move, after all eight positioning columns 14 have contacted the material plate, there is still a gap between the die assembly 2 and the material plate. The die assembly 2 continues to move downward. At this time, the five positioning columns 14 cannot move because they are in contact with the material plate. The transmission column 9 drives the hinge column 8 to slide along the corresponding sliding groove 801 through the hinge arm 11, so that the hinge column 8 loses contact with the corresponding magnetic column 17. Until the die assembly 2 contacts the material plate, the hinge column 8, transmission column 9 and hinge arm 11 all stop moving relative to the stripping frame 4. At this time, the magnetic attraction between the hinge column 8 and the corresponding magnetic column 17 maintains the squeezing force of the positioning column 14 on the material plate.

[0040] Example 3 is an optimization based on Example 2.

[0041] In the current process of processing mobile phone back covers, some stamping machines use grippers on one side of the press to place the material plate and remove the back cover, resulting in low processing efficiency.

[0042] See Figure 4The fixed through groove 401 and the positioning through groove 402 are parallel in length direction. The distance between the two positioning through grooves 402 is less than the distance between two fixed through grooves 401 that are symmetrically distributed in different groups of fixed through grooves 401. The fixed through groove 401 is located between the positioning through groove 402 and the limiting through groove 403. On the stripping frame 4, the distance between the two limiting through grooves 403 gradually increases from the positioning through groove 402 to the fixed through groove 401. By setting the limiting through groove 403 to an inclined state, the positioning post 14 corresponding to the limiting through groove 403 can not only push the material plate to realize the positioning of the material plate, but also make the distance between the two positioning posts 14 greater than the width of the back cover before the stamping process, so that the back cover can pass through the two positioning posts 14. In this way, material is fed on one side and discharged on the other side, so that the material plate feeding and the back cover discharge can be carried out simultaneously, improving the operating efficiency.

[0043] See Figures 5 to 8 An adjustment frame 18 is slidably connected to the upper side of the transmission column 9. The adjustment frame 18 consists of a disc and two rod-shaped legs. The concave die group 2 is used to press the adjustment frame 18. One of the rod-shaped legs on the adjustment frame 18 is threaded, and the rod-shaped leg is threadedly connected to an adjustment knob 19 that abuts against the corresponding transmission column 9.

[0044] The above settings enable the adjustment of the relative position of the adjustment frame 18 and the corresponding transmission column 9 by adjusting the knob 19, thereby changing the vertical distance between the adjustment frame 18 and the die assembly 2 in the unprocessed state. This controls the order in which the die assembly 2 contacts the multiple adjustment frames 18, thereby ensuring the reliability of the positioning column 14 in positioning the material plate.

[0045] Since the three positioning posts 14 on the left front side are fixed, for the extruder 1 that relies on pushing to achieve feeding, after the material plate slides backward along the stripping frame 4 and enters between the eight positioning posts 14, the material plate is offset to the right relative to the position to be stamped. In this state, in order to ensure that the two positioning posts 14 corresponding to the limiting through groove 403 can push the rear side of the material plate rather than other sides of the material plate during movement, the position of the adjusting frame 18 is adjusted so that the two positioning posts 14 corresponding to the two fixed through grooves 401 on the right side move first, pushing the material plate onto the moving path of the two positioning posts 14 corresponding to the two limiting through grooves 403, ensuring that the positioning posts 14 corresponding to the limiting through grooves 403 can push the material plate.

[0046] See Figure 3 and Figure 4A guide ramp 404 is provided on the rear part of the upper side of the stripping frame 4. The height of the guide ramp 404 gradually increases from front to back. During the material feeding process, the material plate slides backward along the upper side of the stripping frame 4 and pushes the rear cover, causing the rear cover to slide backward as well. Since the material plate is thin, in order to reduce the probability that the material plate will slide into the lower or upper side of the rear cover during the pushing of the rear cover, the guide ramp 404 guides the rear cover to tilt. This tilts the front side of the rear cover, inhibits the material plate from sliding upward during the pushing of the front side of the rear cover, and concentrates the weight of the rear cover in a local position at its front and rear, reducing the probability that the material plate will lift the rear cover.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A curved mobile phone back cover integral extrusion molding apparatus, comprising: An extruder (1), a die assembly (2), and a punch assembly (3) are provided. The die assembly (2) and the punch assembly (3) are both mounted on the extruder (1). The die assembly (2) is located above the punch assembly (3). A stripper frame (4) is slidably connected to the upper side of the punch assembly (3). A return spring (5) is fixed between the stripper frame (4) and the punch assembly (3). The stripper frame (4) is characterized by having several mounting frames (6) on it. The mounting frames (6) are slidably connected to a sliding block (7) and a transmission column (9). The block (7) is used to position the material plate. The sliding direction of the sliding block (7) and the transmission column (9) are perpendicular to each other. The concave mold group (2) is used to drive the transmission column (9) to move. The concave mold group (2) is provided with clearance holes (201) at the positions corresponding to all the sliding blocks (7). The transmission column (9) is fixedly connected to the adjacent mounting frame (6) with a reset tension spring (10). The sliding block (7) is provided with a hinge column (8). The hinge column (8) is hinged to the corresponding transmission column (9) with a hinge arm (11). The upper side of the sliding block (7) is threaded with a locking bolt (13), the locking bolt (13) is fitted with a positioning post (14), the positioning post (14) is used to extrude the material plate, a positioning spring (15) is placed between the positioning post (14) and the corresponding locking bolt (13), and the positioning post (14) abuts against the corresponding sliding block (7). A locking block (16) is slidably connected inside the sliding block (7). The locking block (16) is hemispherical near the corresponding locking bolt (13). The locking bolt (13) is used to press the corresponding locking block (16). The locking block (16) is used to press the corresponding mounting frame (6) and limit the sliding block (7). The sliding block (7) is provided with a sliding groove (801) near the position corresponding to the hinge post (8). The hinge post (8) slides within the corresponding sliding groove (801). A magnetic post (17) is embedded in the sliding groove (801) near the position corresponding to the transmission post (9). The magnetic post (17) is used to attract the corresponding hinge post (8).

2. The integral extrusion molding apparatus for curved mobile phone back covers according to claim 1, characterized in that: The unloading frame (4) is provided with two sets of fixed through slots (401), two sets of positioning through slots (402), and two sets of limiting through slots (403) symmetrically distributed. The fixed through slots (401), positioning through slots (402), and limiting through slots (403) have the same shape. The number of mounting frames (6) is equal to the sum of the number of fixed through slots (401), positioning through slots (402), and limiting through slots (403). Each set of fixed through slots (401) consists of two symmetrically distributed slots.

3. The integral extrusion molding apparatus for curved mobile phone back covers according to claim 2, characterized in that: The upper side of the sliding block (7) is provided with a frustum (701), the shape of the lower side of the positioning post (14) matches the shape of the corresponding frustum (701), the periphery of the frustum (701) is provided with uniformly distributed strip grooves (702), and the lower side of the positioning post (14) is provided with a protruding ridge for embedding in the strip grooves (702).

4. The integral extrusion molding apparatus for curved mobile phone back covers according to claim 3, characterized in that: The fixed through groove (401) is parallel to the length direction of the positioning through groove (402). The distance between the two positioning through grooves (402) is less than the distance between the two fixed through grooves (401) that are symmetrically distributed in different groups of fixed through grooves (401). The fixed through groove (401) is located between the positioning through groove (402) and the limiting through groove (403). On the stripping frame (4), in the direction from the positioning through groove (402) to the fixed through groove (401), the distance between the two limiting through grooves (403) gradually increases.

5. The integral extrusion molding apparatus for curved mobile phone back covers according to claim 4, characterized in that: An adjustment frame (18) is slidably connected to the upper side of the transmission column (9), and the concave die (2) is used to press the adjustment frame (18). The adjustment frame (18) is threadedly connected to an adjustment knob (19) that abuts against the corresponding transmission column (9).

6. The integral extrusion molding apparatus for curved mobile phone back covers according to claim 5, characterized in that: A protrusion (601) is provided on the side of the mounting frame (6) away from the corresponding transmission column (9). The protrusion (601) is used to be embedded in the stripping frame (4). The length of the fixing through groove (401) is not less than the length of the mounting frame (6). A fixing knob (12) is threadedly connected to the outer periphery of the stripping frame (4) near all the mounting frames (6). The fixing knob (12) abuts against the corresponding mounting frame (6) to fix the mounting frame (6).

7. The integral extrusion molding apparatus for curved mobile phone back covers according to claim 6, characterized in that: The unloading frame (4) is provided with a guide slope (404) near the limiting groove (403).

Images