An injection mold for integrally forming special-shaped plastic parts

Abstract

The present invention relates to the technical field of injection molding equipment, and provides an injection mold for integrally molding special-shaped plastic parts, including a male mold and a female mold used in conjunction with each other, the female mold is provided with grooves on both sides of its mold cavity that exceed the length of the mold cavity, and a rotatable winding rod and unwinding rod are respectively provided in the two grooves, and the outer wall of the unwinding rod is wrapped with a sandpaper roll, the upper side of the sandpaper roll is flush with the upper surface of the female mold, and its two ends are both beyond the mold cavity of the female mold, and the two ends are respectively connected to the winding rod by connecting belts at the places where the two ends exceed the mold cavity, and gears are symmetrically provided at both ends of the winding rod. The present invention overcomes the shortcomings of the prior art, has a reasonable design, and a compact structure. When the male mold and the female mold are relatively separated, the sandpaper moves smoothly along the surface contour of the female mold, and the injection molding edge of the plastic part in the mold cavity is accurately ground and polished, so as to facilitate the flexible and efficient grinding and polishing of the edges of plastic parts of various shapes.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding equipment, and in particular to an injection mold for integrally molding special-shaped plastic parts. Background Art

[0002] Molds are important tools in the manufacture of plastic products, and are particularly suitable for producing plastic parts with complex shapes and precise dimensions. However, during the injection molding process, due to the tiny gaps at the mold joints or the shrinkage differences during the material cooling process, burrs or unevenness often appear on the edges of the products after injection molding.

[0003] The Chinese invention patent with application number: CN202210962990.1 discloses: an integrated injection molding device for special-shaped plastic parts, including a base, a melt injection molding device body is fixedly connected to one side of the upper end surface of the base, a feeding device is provided on the upper end surface of the melt injection molding device body, a rotating screw is drivingly connected to one side of the side end surface of the melt injection molding device body, a pressing block is slidably connected to the upper end surface of the base, a ball nut matched with the rotating screw is provided inside the pressing block, a male mold is fixedly connected to the side where the melt injection molding device body is bonded to the pressing block, a trimming mechanism for processing the edge of the finished product is sleeved on the outer end surface of the male mold, and a female mold matched with the male mold is provided on the side where the pressing block is bonded to the melt injection molding device body.

[0004] The above-mentioned injection molding equipment grinds and polishes the edge of the plastic part by setting a polishing airbag and fitting it with the product and then rotating it. However, when the edge of the plastic part is an irregular shape, the polishing airbag cannot fit with the edge of the plastic part, and thus the edge of the plastic part cannot be completely polished. For this reason, we propose an injection mold for integrally forming special-shaped plastic parts. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies of the prior art, the present invention provides an integrated injection mold for special-shaped plastic parts, which overcomes the deficiencies of the prior art, has a reasonable design and a compact structure, and solves the problem that the edges of existing plastic parts cannot be completely polished when the edges are irregularly shaped.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an injection mold for integrally forming a special-shaped plastic part, comprising a male mold and a female mold used in conjunction with each other, the female mold is provided with grooves extending beyond the length of the mold cavity on both sides of its mold cavity, a rotatable winding rod and an unwinding rod are provided in the two grooves, a sandpaper roll is wound around the outer wall of the unwinding rod, the upper side of the sandpaper roll is flush with the upper surface of the female mold, both ends of the unwinding rod extend beyond the mold cavity of the female mold, and the two ends are connected to the winding rod through connecting belts at the places extending beyond the mold cavity, gears are symmetrically provided at both ends of the winding rod, and driving components for driving the gears to rotate several circles are symmetrically provided at both sides of the male mold;

[0009] The driving assembly comprises a driving rod and a plurality of driving members evenly arranged on the driving rod and capable of driving the gear to rotate a plurality of circles.

[0010] Preferably, the driving member is a first ratchet rotatably connected to the surface of the driving rod, the surface of the driving rod is provided with a first notch for accommodating the first ratchet, the first notch is provided with a first spring connected to the side wall of the first ratchet, the punch and the die are in separate motion, the first ratchet abuts against the teeth of the gear, causing the gear to rotate.

[0011] Preferably, both ends of the unwinding rod are connected to the inner wall of the groove on the die through a torsion spring.

[0012] Preferably, the two connecting belts are arranged on both sides of the die cavity, and a cavity for accommodating the connecting belts is opened on the die, so that the upper surface of the connecting belt does not exceed the upper surface of the die.

[0013] Preferably, a discharge rack is provided on the side of the die facing away from its mold cavity, a second spring is provided between the die and the discharge rack, and a plurality of push rods are provided on the discharge rack, at least one of which passes through the die and is inserted into the mold cavity from the bottom wall of the die.

[0014] Preferably, lifting components are provided on both sides of the concave die to drive the unloading rack to move along the direction of its push rod;

[0015] The lifting assembly includes a T-shaped pull rod for driving the unloading rack and a driving unit providing power to the T-shaped pull rod;

[0016] The driving unit comprises a driving block and a ratchet, wherein the ratchet is fixedly connected to one end of the unwinding rod extending out of the concave die, and when the unwinding rod performs a rewinding motion, the ratchet drives the driving block to move;

[0017] The unloading rack is provided with a strip groove, the T-shaped head of the T-shaped pull rod passes through the strip groove, and the width of the T-shaped head is greater than the strip groove.

[0018] Preferably, the driving block comprises a circular ring, a second notch is circumferentially formed on the surface of the circular ring, a second ratchet tooth used in cooperation with the ratchet wheel is rotatably connected in the second notch, the second ratchet tooth is connected to the inner wall of the second notch via a fourth spring, and when the unwinding rod performs a winding motion, the ratchet tooth of the ratchet wheel abuts against the second ratchet tooth, causing the circular ring to rotate;

[0019] A support plate rotatably connected to the side wall of the die is provided in the circular ring, a limiting groove is provided in the support plate, a lifting rod movable along the groove direction is provided in the limiting groove, and the end of the lifting rod is plugged into the top of the T-shaped pull rod to form a rotational connection relationship;

[0020] The side wall of the die is provided with a track groove connected end to end, and the end of the lifting rod away from the T-shaped pull rod is inserted into the track groove. The T-shaped pull rod moves with the circular ring, and its end moves along the track of the track groove.

[0021] Preferably, both sides of the die are provided with end-to-end connected track grooves, and the track grooves include a parallel section, an ascending section and a return section arranged in sequence;

[0022] The end of the lifting rod away from the T-shaped pull rod is inserted into the track groove, and the lifting rod drives the T-shaped pull rod to move, and it performs a circular motion through the parallel section, the ascending section and the return section in sequence.

[0023] Preferably, long strip-shaped slide grooves are provided on both sides of the die, and the rod portion of the T-shaped pull rod passes through the slide grooves and moves along the long strip-shaped slide grooves.

[0024] Preferably, there are no less than five push rods, at least one of which penetrates from the bottom wall of the die to its inner cavity, and the remaining push rods are circumferentially arranged outside the four sides of the die;

[0025] The four side surfaces of the die are all slidably connected with side pressure rods, and a trapezoidal block is provided on one side of the side pressure rod that passes through the die. The trapezoidal block is connected to the side wall of the die through a third spring.

[0026] (III) Beneficial effects

[0027] The embodiment of the present invention provides an injection mold for integrally forming a special-shaped plastic part. It has the following beneficial effects:

[0028] 1. When the punch and die are relatively separated, the sandpaper moves smoothly along the surface contour of the die, accurately grinding and polishing the injection molding edge of the plastic part in the mold cavity, which facilitates flexible and efficient grinding and polishing of the edges of various shapes of plastic parts.

[0029] 2. During the blanking process, the plastic parts in the mold cavity are subjected to circumferential and bottom pressures, which facilitates the separation of the plastic parts from the mold cavity and avoids damage to the plastic parts when demolding the plastic parts only from the bottom of the mold cavity, which is beneficial to improving the qualified rate of molded plastic parts.

[0030] 3. No external drive is required during the grinding, polishing and cutting process, which greatly reduces the manufacturing cost of the device and facilitates its promotion and utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a main perspective schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a bottom-up stereoscopic schematic diagram of the overall structure of the present invention;

[0033] Figure 3 It is a top perspective schematic diagram of the concave mold structure of the present invention;

[0034] Figure 4 It is a top view schematic diagram of the connecting belt structure of the present invention;

[0035] Figure 5 It is a three-dimensional schematic diagram of the structure of the material unloading rack of the present invention;

[0036] Figure 6 It is a three-dimensional schematic diagram of the circular ring structure of the present invention;

[0037] Figure 7 It is a three-dimensional schematic diagram of the T-shaped pull rod structure of the present invention.

[0038] In the figure: 1, punch; 11, driving rod; 12, first notch; 13, first ratchet; 14, first spring; 2, die; 21, winding rod; 211, gear; 22, unwinding rod; 221, torsion spring; 222, ratchet; 23, connecting belt; 241, unloading rack; 242, push rod; 243, second spring; 244, strip groove; 25, side pressure rod; 26, trapezoidal block; 27, third spring; 281, ring; 282, second notch; 283, second ratchet; 284, fourth spring; 285, support plate; 286, limit groove; 287, lifting rod; 288, T-shaped pull rod; 29, track groove. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See attached Figure 1-2, an injection mold for integrally forming a special-shaped plastic part, comprising a male mold 1 and a female mold 2 used in conjunction with each other, the female mold 2 is provided with grooves on both sides of its mold cavity that exceed the length of the mold cavity, and the two grooves are rounded toward one side of the mold cavity to effectively reduce the wear of sandpaper;

[0041] A rotatable winding rod 21 and an unwinding rod 22 are respectively arranged in the two grooves. A sandpaper roll is wound around the outer wall of the unwinding rod 22. The upper side of the sandpaper roll is flush with the upper surface of the concave mold 2. Both ends of the sandpaper roll extend beyond the mold cavity of the concave mold 2. The two ends are connected to the winding rod 21 through connecting belts 23 at the places where the two ends extend beyond the mold cavity. Gears 211 are symmetrically arranged at both ends of the winding rod 21. Driving components for driving the gears 211 to rotate several circles are symmetrically arranged on both sides of the male mold 1. After the male mold 1 and the female mold 2 are molded together, injection molding is performed. After the injection molding is completed, the male mold 1 is separated from the concave mold 2, and the plastic part remains in the concave mold 2. At this time, the driving component drives the winding rod 21 to rotate several circles through the gear 211. At this time, the winding rod 21 winds the sandpaper roll set on the unwinding rod 22 through the connecting belt 23. In this process, the sandpaper moves smoothly along the surface contour of the concave mold 2, and the edge of the plastic part in the mold cavity is accurately polished and polished. As long as the width of the sandpaper roll exceeds the width of the plastic part, the edges of plastic parts of various shapes can be flexibly and efficiently polished;

[0042] The driving assembly includes a driving rod 11 and a plurality of driving parts evenly arranged on the driving rod 11 and capable of driving the gear 211 to rotate for a plurality of circles. During the separation movement of the punch 1 and the die 2, the driving rod 11 drives the driving parts to move relatively away from the gear 211, further enabling the winding rod 21 to wind up the sandpaper roll, thereby completing the grinding work without the need for an external drive, thereby saving the equipment manufacturing cost.

[0043] The driving member is a first ratchet 13 rotatably connected to the surface of the driving rod 11. The surface of the driving rod 11 is provided with a first notch 12 for accommodating the first ratchet 13. A first spring 14 connected to the side wall of the first ratchet 13 is provided in the first notch 12. The punch 1 and the die 2 are in a separation movement. The first ratchet 13 abuts against the teeth of the gear 211, so that the gear 211 rotates, and the punch 1 and the die 2 are relatively separated. At this time, the end of the first ratchet 13 abuts against the teeth of the gear 211, so that the gear 211 drives the winding rod 21 to rotate, and further causes the sandpaper to move toward the winding rod 21, so as to grind and polish the plastic part.

[0044] Furthermore, both ends of the unwinding rod 22 are connected to the inner wall of the groove on the die 2 through the torsion spring 221. When the driving member is completely separated from the gear 211, the unwinding rod 22 rotates in the opposite direction under the action of the torsion spring 221, and the sandpaper is wound up, so that the sandpaper is used to polish the surface of the plastic part again, thereby improving the quality of polishing.

[0045] Furthermore, the first ratchet 13 on the driving rod 11 is arranged away from one end of the punch 1 to prevent the punch 1 from affecting the movement of the sandpaper toward the winding rod 21 .

[0046] When the punch 1 and the die 2 are relatively close, the first ratchet 13 will move into the first notch 12 under the contact of the teeth of the gear 211. At this time, the winding rod 21 will not rotate, and the sandpaper will not move during the mold closing process, thereby reducing the loss of the sandpaper and increasing its service life.

[0047] See attached Figure 3 The two connecting strips 23 are arranged on both sides of the mold cavity of the female mold 2, and a cavity for accommodating the connecting strips 23 is opened on the female mold 2, so that the upper surface of the connecting strips 23 does not exceed the upper surface of the female mold 2, avoiding the presence of a gap between the male mold 1 and the female mold 2 during the mold closing process, which affects the quality of the injection molding.

[0048] See attached Figure 5 A material discharge rack 241 is provided on the side of the die 2 facing away from its mold cavity, a second spring 243 is provided between the die 2 and the material discharge rack 241, and a plurality of push rods 242 are provided on the material discharge rack 241, at least one of which penetrates the die 2 and is inserted into the mold cavity from the bottom wall of the die 2. By driving the movement of the material discharge rack 241, the push rods 242 can push the plastic parts in the die 2 out of the mold cavity, so as to facilitate subsequent material discharge.

[0049] See attached Figure 3 , 7 , lifting components are provided on both sides of the concave mold 2 to drive the unloading frame 241 to move along the direction of its push rod 242. The lifting components drive the unloading frame 241 to move, and further enable the push rod 242 to push the plastic part out of the mold cavity, so as to facilitate unloading;

[0050] The lifting assembly includes a T-shaped pull rod 288 for driving the unloading rack 241 and a driving unit for providing power to the T-shaped pull rod 288. The driving unit drives the T-shaped pull rod 288 to move, and further causes the unloading rack 241 to move along the direction of its push rod 242.

[0051] The driving unit includes a driving block and a ratchet 222. The ratchet 222 is fixedly connected to one end of the unwinding rod 22 extending out of the die 2. When the unwinding rod 22 performs a rewinding motion, the ratchet 222 drives the driving block to move, and further the T-shaped pull rod 288 drives the unloading rack 241 to move along the direction of its push rod 242. At this time, the unloading of plastic parts is completed.

[0052] When the unwinding rod 22 moves in the reverse direction, the driving block does not move, so as to avoid the movement of the plastic part during the grinding and polishing of the plastic part, thereby affecting the grinding and polishing of the plastic part.

[0053] A strip groove 244 is provided on the material unloading rack 241 , and a T-shaped head of the T-shaped pull rod 288 passes through the strip groove 244 , and the width of the T-shaped head is greater than the strip groove 244 , so that the T-shaped rod can drive the material unloading rack 241 to move.

[0054] See attached Figure 3-4 6. A support plate 285 rotatably connected to the side wall of the die 2 is provided in the circular ring 281. A limiting groove 286 is provided in the support plate 285. A lifting rod 287 movable along the groove direction is provided in the limiting groove 286. The end of the lifting rod 287 is plugged into the top of the T-shaped tie rod 288 to form a rotatable connection relationship. When the circular ring 281 rotates, the lifting rod 287 is driven to move through the supporting plate 285 and the limiting groove 286, and the T-shaped tie rod 288 further drives the unloading rack 241 to move.

[0055] Furthermore, the side wall of the die 2 is provided with a track groove 29 connected end to end, and the end of the lifting rod 287 away from the T-shaped tie rod 288 is inserted into the track groove 29, and the T-shaped tie rod 288 moves along the track of the track groove 29 following the movement of the ring 281, and the end of the lifting rod 287 moves along the track groove 29 during the movement, further making the movement track of the T-shaped tie rod 288 the same as the internal track of the track groove 29;

[0056] Furthermore, both sides of the die 2 are provided with end-to-end connected track grooves 29, the track grooves 29 include a parallel section, an ascending section and a return section arranged in sequence, the end of the lifting rod 287 away from the T-shaped tie rod 288 is inserted into the track groove 29, the lifting rod 287 drives the T-shaped tie rod 288 to move, and it performs a circular motion through the parallel section, the ascending section and the return section in sequence, the motion trajectories of the T-shaped tie rod 288 and the lifting rod 287 include parallel, ascending and return, the T-shaped tie rod 288 will not drive the unloading rack 241 to move when it moves in parallel, and its ascending motion It will drive the unloading rack 241 to move and make the push rod 242 move toward the mold cavity of the die 2. At this time, the push rod 242 pushes the plastic part out of the mold cavity. Then, with the cooperation of the second spring 243, the T-shaped pull rod 288 makes a return motion and returns to the initial position. During the whole process, when the unwinding rod 22 initially rewinds the sandpaper, the T-shaped pull rod 288 does not drive the unloading rack 241 to move. When the sandpaper is rolled up and is not at the mold cavity mouth, the unloading rack 241 drives the push rod 242 to push the plastic part in the mold cavity of the die 2 to prevent the sandpaper from affecting the unloading of the plastic part.

[0057] The driving block includes a circular ring 281, and a second notch 282 is circumferentially provided on the surface of the circular ring 281. A second ratchet 283 used in conjunction with the ratchet 222 is rotatably connected in the second notch 282. The second ratchet 283 is connected to the inner wall of the second notch 282 through a fourth spring 284. The unwinding rod 22 performs a rewinding motion, and the ratchet teeth of the ratchet 222 abut against the second ratchet 283, so that the circular ring 281 rotates. The circular ring 281 rotates during the rewinding process of the unwinding rod 22, and does not rotate during the unwinding process, so as to avoid the plastic part being ejected during the polishing of the plastic part, thereby affecting the polishing of the plastic part. In addition, through the cooperation between the second ratchet 283 and the ratchet 222, the T-shaped pull rod 288 will not drive the unwinding rod 22 to rotate during the return motion, that is, when the unwinding rack 241 is reset under the action of the second spring 243, the unwinding rod 22 will not drive the sandpaper roll to rotate.

[0058] Long strip-shaped slide grooves are provided on both sides of the concave mold 2. The rod portion of the T-shaped pull rod 288 passes through the slide grooves and moves along the long strip-shaped slide grooves, thereby improving the stability of the movement of the T-shaped pull rod 288.

[0059] Preferably, there are no less than five push rods 242, at least one of which penetrates from the bottom wall of the female mold 2 to its inner cavity, and the remaining push rods 242 are circumferentially arranged outside the four sides of the female mold 2, so as to facilitate extrusion and demolding of the plastic part in the mold cavity of the female mold 2 from multiple directions, and prevent the plastic part from being damaged when the plastic part is demolded from the bottom when the plastic part adheres to the mold cavity;

[0060] The four side surfaces of the die 2 are all slidably connected with side pressure rods 25. A trapezoidal block 26 is provided on one side of the die 2 that passes through the side pressure rods 25. The trapezoidal block 26 is connected to the side wall of the die 2 through a third spring 27. When the push rod 242 pushes the plastic part to be demolded, the push rod 242 arranged outside the four side surfaces of the die 2 will push the trapezoidal block 26, further enabling the four side pressure rods 25 to squeeze the periphery of the plastic part, facilitating the separation of the plastic part from the mold cavity, and avoiding damage to the plastic part when demolding the plastic part only from the bottom of the mold cavity, which is beneficial to improving the qualified rate of molded plastic parts.

[0061] Working principle: the punch 1 and the die 2 are combined to complete the injection molding process. After the injection molding is completed, the punch 1 and the die 2 are relatively separated, and the plastic part remains in the mold cavity of the die 2. When the punch 1 is completely separated from the mold cavity of the die 2, the first ratchets 13 on the driving rod 11 will drive the winding rod 21 to rotate several circles through the gear 211. At this time, the sandpaper on the unwinding rod 22 will move toward the winding rod 21 under the drive of the connecting belt 23, and the sandpaper moves smoothly along the surface contour of the die 2. After the driving rod 11 is completely separated from the gear 211, the unwinding rod 22 is reset and the sandpaper is wound up under the action of the torsion spring 221. At this time, the sandpaper moves in the opposite direction along the surface contour of the die 2, and the injection molding edge of the plastic part in the mold cavity is accurately polished and polished, which is convenient for realizing flexible and efficient polishing of the edges of plastic parts of various shapes.

[0062] When the unwinding rod 22 is reset to rewind the sandpaper, the lifting rod 287 moves in the track groove 29, further enabling the T-shaped pull rod 288 to drive the unloading rack 241 to unload the plastic parts in the cavity of the die 2. During the unloading process, the plastic parts in the cavity are subjected to circumferential and bottom pressures, which facilitates the separation of the plastic parts from the cavity and avoids damage to the plastic parts when demolding the plastic parts only from the bottom of the cavity, which is beneficial to improving the qualified rate of molded plastic parts.

[0063] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. 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 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. An injection mold for integrally molding a special-shaped plastic part, comprising a male mold (1) and a female mold (2) used in conjunction with each other, characterized in that: The female mold (2) is provided with grooves extending beyond the length of the mold cavity on both sides of its mold cavity, and a rotatable winding rod (21) and unwinding rod (22) are provided in the two grooves respectively. A sandpaper roll is wound around the outer wall of the unwinding rod (22), and the upper side of the sandpaper roll is flush with the upper surface of the female mold (2). Both ends of the sandpaper roll extend beyond the mold cavity of the female mold (2), and the portions where the two ends extend beyond the mold cavity are connected to the winding rod (21) via connecting belts (23). Gears (211) are symmetrically provided at both ends of the winding rod (21), and drive components for driving the gears (211) to rotate several circles are symmetrically provided on both sides of the male mold (1); The driving assembly comprises a driving rod (11) and a plurality of driving members evenly arranged on the driving rod (11) and capable of driving the gear (211) to rotate a plurality of circles; The driving member is a first ratchet (13) rotatably connected to the surface of the driving rod (11); a first notch (12) for accommodating the first ratchet (13) is provided on the surface of the driving rod (11); a first spring (14) connected to a side wall of the first ratchet (13) is provided in the first notch (12); the male die (1) and the female die (2) are in separation motion; the first ratchet (13) abuts against teeth of the gear (211), causing the gear (211) to rotate.

2. The one-piece injection mold for special-shaped plastic parts according to claim 1, characterized in that: Both ends of the unwinding rod (22) are connected to the inner wall of the groove on the concave die (2) via a torsion spring (221).

3. The one-piece injection mold for special-shaped plastic parts according to claim 1, characterized in that: The two connecting belts (23) are arranged on both sides of the mold cavity of the female mold (2), and a cavity for accommodating the connecting belt (23) is opened on the female mold (2), so that the upper surface of the connecting belt (23) does not exceed the upper surface of the female mold (2).

4. The one-piece injection mold for special-shaped plastic parts according to claim 2, characterized in that: A material discharge rack (241) is provided on the side of the female mold (2) facing away from its mold cavity, a second spring (243) is provided between the female mold (2) and the material discharge rack (241), and a plurality of push rods (242) are provided on the material discharge rack (241), at least one of the push rods (242) passes through the female mold (2) and is inserted into the mold cavity from the bottom wall of the female mold (2).

5. The one-piece injection mold for special-shaped plastic parts according to claim 4, characterized in that: Lifting components for driving the unloading frame (241) to move in the direction of its push rod (242) are provided on both sides of the concave die (2); The lifting assembly comprises a T-shaped pull rod (288) for driving the unloading rack (241) and a driving unit for providing power to the T-shaped pull rod (288); The driving unit comprises a driving block and a ratchet (222); the ratchet (222) is fixedly connected to an end of the unwinding rod (22) extending out of the die (2); when the unwinding rod (22) performs a rewinding movement, the ratchet (222) drives the driving block to move; The unloading rack (241) is provided with a strip groove (244), and the T-shaped head of the T-shaped pull rod (288) passes through the strip groove (244), and the width of the T-shaped head is greater than the strip groove (244).

6. The one-piece injection mold for special-shaped plastic parts according to claim 5, characterized in that: The driving block comprises a circular ring (281), a second notch (282) is circumferentially formed on the surface of the circular ring (281), a second ratchet tooth (283) used in cooperation with the ratchet wheel (222) is rotatably connected in the second notch (282), the second ratchet tooth (283) being connected to the inner wall of the second notch (282) via a fourth spring (284), and when the unwinding rod (22) performs a winding motion, the ratchet teeth of the ratchet wheel (222) abut against the second ratchet tooth (283), causing the circular ring (281) to rotate; A support plate (285) rotatably connected to the side wall of the die (2) is provided in the circular ring (281), a limiting groove (286) is provided in the support plate (285), a lifting rod (287) movable along the groove direction is provided in the limiting groove (286), and an end of the lifting rod (287) is inserted into the top of the T-shaped pull rod (288) to form a rotatable connection relationship; The side wall of the die (2) is provided with a track groove (29) connected end to end. The end of the lifting rod (287) facing away from the T-shaped pull rod (288) is inserted into the track groove (29). The T-shaped pull rod (288) moves following the circular ring (281), and its end moves along the track of the track groove (29).

7. The one-piece injection mold for special-shaped plastic parts according to claim 6, characterized in that: Both sides of the die (2) are provided with end-to-end connected track grooves (29), the track groove (29) comprising a parallel section, an ascending section and a return section arranged in sequence; One end of the lifting rod (287) facing away from the T-shaped pull rod (288) is inserted into the track groove (29), and the lifting rod (287) drives the T-shaped pull rod (288) to move, and it performs a cyclic motion through the parallel section, the ascending section and the return section in sequence.

8. The one-piece injection mold for special-shaped plastic parts according to claim 7, characterized in that: Long strip-shaped slide grooves are provided on both sides of the concave mold (2), and the rod portion of the T-shaped pull rod (288) passes through the slide grooves and moves along the long strip-shaped slide grooves.

9. The one-piece injection mold for special-shaped plastic parts according to claim 4, characterized in that: There are no less than five push rods (242), at least one of which penetrates from the bottom wall of the die (2) to the inner cavity thereof, and the remaining push rods (242) are circumferentially arranged outside the four side surfaces of the die (2); The four side surfaces of the die (2) are all slidably connected with side pressure rods (25), and a trapezoidal block (26) is provided on one side of the side pressure rod (25) that passes through the die (2), and the trapezoidal block (26) is connected to the side wall of the die (2) via a third spring (27).

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