Nylon pulley blank injection molding equipment

Abstract

The invention relates to the technical field of nylon pulley machining, and discloses nylon pulley blank injection molding equipment which comprises a frame body, a fixed upper mold frame is arranged at the top of the frame body, and a movable lower mold frame is arranged in the fixed upper mold frame; the fixed upper mold frame comprises a fixed mold plate frame fixedly connected to the top of the frame body, an injection molding upper mold is fixedly connected to the inner wall of the top of the fixed mold plate frame, and the movable lower mold frame comprises a lifting mold plate installed in the fixed mold plate frame in a sliding mode. The equipment integrates full-automatic processes of injection molding, mold closing, mold opening, ejection, transferring, material cutting and discharging, manual intervention is greatly reduced, the production efficiency and continuity are improved, a moving type material cutting assembly is integrated, and through automatic switching of three precise stations (material receiving, material cutting and discharging), the production efficiency is greatly improved. Automatic separation and collection of nylon pulley injection molding parts and material handles (nylon excess materials) are achieved.

Description

Technical Field

[0001] This invention relates to the field of nylon pulley processing technology, specifically to a nylon pulley blank injection molding equipment. Background Technology

[0002] In industrial production, nylon (polyamide) is an ideal material for manufacturing transmission components such as pulleys due to its excellent mechanical properties, wear resistance, self-lubrication, and chemical corrosion resistance.

[0003] However, traditional nylon pulley injection molding technology still faces a series of problems that urgently need to be solved in terms of production efficiency, product quality, and automation: 1. Traditional nylon pulley injection molding often uses a one-cavity, one-mold design, which can only produce one product per injection cycle, resulting in low production efficiency; 2. After injection molding, the material between the two pulleys needs to be removed. Traditional processes generally rely on manual breaking, which is not only inefficient, but also very easy to produce burrs or damage the product at the break, affecting the appearance and performance of the pulley. This process also makes it difficult to ensure the flatness of the cut surface, which may require secondary processing and increase costs. Therefore, an automated nylon pulley injection molding equipment is proposed to achieve integrated mold closing and molding, finished product removal and transfer, cutting and unloading. Through drive components such as cylinders and linear modules, precise positioning and seamless connection between each station are achieved, reducing manual intervention and ultimately building an efficient and stable automated production line. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an injection molding equipment for nylon pulley blanks, mainly to solve the problems of low injection efficiency and low automation in existing nylon pulley injection molding equipment.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A nylon pulley blank injection molding equipment includes a frame, a fixed upper mold frame is provided on the top of the frame, and a movable lower mold frame is provided inside the fixed upper mold frame; The fixed upper mold frame includes a fixed template frame fixedly connected to the top of the frame body, and an injection upper mold is fixedly connected to the top inner wall of the fixed template frame. The movable lower mold frame includes a lifting template that is slidably installed in the fixed template frame. Two transverse guide rails are fixedly connected to the upper surface of the lifting template, and an injection lower mold that cooperates with the injection upper mold is installed between the two transverse guide rails. The frame is equipped with a mold-closing cylinder that drives the lower injection mold to move and closes with the upper injection mold. The upper surface of the lifting template is provided with a pushing component for driving the lower injection mold to move and a connecting flipping component for driving the lower injection mold to flip. One side of the fixed template frame is provided with a stripping component to help eject the nylon pulley injection molded part after it is formed in the lower injection mold. At the top of the frame, away from the fixed upper mold frame, there is a moving material cutting assembly for cutting and separating the molded nylon pulley injection molded parts.

[0006] Furthermore, the top of the injection mold has two assembly slots, and two symmetrically distributed inclined pressure slides are slidably installed in each of the two assembly slots. One end of the inclined pressure slide is fixedly connected to an opening and closing mold core. The two opposing opening and closing mold cores and the injection mold form an injection cavity with a nylon pulley. The other end of the inclined pressure slide passes through the injection mold and is fixedly connected to an inclined pressure return spring that contacts the side of the injection mold. The top of the inclined pressure slide has an inclined pressure hole. The top of the injection mold has an injection diversion channel connecting the two injection cavities. The interior of the injection mold has a stripper plate. The upper surface of the stripper plate is fixedly connected to multiple ejector pins, and the top of the ejector pins passes through the injection mold and is consistent with the arc contour of the inner wall of the injection cavity and the injection diversion channel. Multiple stripping return springs are provided between the stripper plate and the injection mold. The bottom of the upper injection mold is provided with a contoured cavity that matches the injection flow channel and two injection cavities. The top of the fixed template frame is provided with an injection hole that communicates with the upper injection mold and the injection flow channel. The bottom of the upper injection mold is provided with a relief pressure column that matches the inclined pressure hole.

[0007] Based on the aforementioned scheme, side support arms are fixedly connected to both sides of the injection mold, and vertical bearing seats are provided at the cylindrical ends of the side support arms, and the vertical bearing seats are fixed to the slide table provided at the top of the transverse guide rail. A positioning pin hole is provided on one side of the injection mold, and a positioning cylinder is fixedly connected to the lower surface of the lifting template. The piston end of the positioning cylinder can pass through the lifting template and cooperate with the positioning pin hole.

[0008] As a further embodiment of the present invention, the pushing assembly includes a pushing cylinder fixedly connected to one side of the lifting template, one end of the piston rod of the pushing cylinder is fixedly connected to a pushing frame, and the two ends of the pushing frame are respectively rotatably connected to the cylindrical ends of the two side support arms. The upper surface of the lifting template is fixedly connected to two symmetrically distributed side supports. The inside of the side supports is provided with a side groove that matches the oval end of the side support arm. The end of the side groove is provided with a circular through groove that allows the oval end of the side support arm to rotate and avoid being rotated. One side of the lifting template is provided with a relief groove that limits the movement of the lower injection mold after it is flipped.

[0009] Furthermore, the connecting tilting assembly includes a side mounting bracket and a connecting cylinder fixedly connected to one side of the lifting template. Inside the side mounting bracket, a drive gear is rotatably mounted via a bearing, and a driven shaft is installed through it. A driven gear that meshes with the drive gear is fixedly connected to the outer circumference of the driven shaft. One end of the piston rod of the connecting cylinder is rotatably connected to the end of the driven shaft via a rotating retainer. The other end of the driven shaft has a connecting hole that mates with the oval end of the side support arm. A drive connecting shaft is fixedly connected to one side of the drive gear. A drive cylinder is hinged to the upper surface of the lifting template, and one end of the piston rod of the drive cylinder is rotatably connected to the drive connecting shaft.

[0010] Based on the aforementioned solution, a stripping hole is provided at the bottom of the injection mold; The unloading assembly includes an unloading mounting frame fixedly connected to the top of the fixed template frame. An unloading lifting cylinder is fixedly connected to one side of the unloading mounting frame. One end of the piston rod of the unloading lifting cylinder passes through the unloading mounting frame and is fixedly connected to the unloading lifting frame. A guide rod that is slidably connected to the unloading mounting frame is fixedly connected to the top of the unloading lifting frame. An unloading cylinder is fixedly connected to one side of the unloading lifting frame. One end of the piston rod of the unloading cylinder passes through the unloading lifting frame and is fixedly connected to a top rod. One end of the top rod can pass through the unloading hole and contact the unloading plate.

[0011] As a further embodiment of the present invention, the top of the frame is fixedly connected with four lower mold frame support members for supporting and positioning the lifting template.

[0012] Furthermore, the shifting cutting assembly includes a shifting mounting frame fixedly connected to the top of the frame. Two symmetrically distributed shifting guide rails are fixedly connected to the top of the shifting mounting frame. A rotary cutting mechanism is slidably mounted between the two shifting guide rails via a slide table. A ball screw linear module is fixedly connected to one side of the shifting mounting frame. The slide table of the ball screw linear module is connected to the rotary cutting mechanism via a connecting plate. The interior of the shifting mounting frame is equipped with a waste collection box and a nylon pulley hopper.

[0013] Based on the aforementioned scheme, the rotary cutting mechanism includes a transfer frame, with two symmetrically distributed vertical plates fixedly connected to the bottom of the transfer frame. A rotary cylinder is fixedly connected to one side of the vertical plate, and a rotary mold frame is fixedly connected between the rotating ends of the two rotary cylinders. The rotary mold frame has a transfer mold cavity inside for receiving the molded nylon pulley injection molded part. A cutting and lifting cylinder is fixedly connected to the top of the transfer frame. One end of the piston rod of the cutting and lifting cylinder passes through the transfer frame and is fixedly connected to a cutting and lifting frame that is slidably installed with the transfer frame. A contour cutter that cooperates with the rotating mold frame is fixedly connected to the bottom of the cutting and lifting frame.

[0014] As a further embodiment of the present invention, three slotted photoelectric switches are fixedly connected to one side of the transfer mounting frame. The positions of the three slotted photoelectric switches correspond to the positions of the nylon pulley injection molded parts after transfer molding, the nylon pulley injection molded parts after cutting molding, and the nylon pulley injection molded parts after blanking molding, respectively. One end of the transfer frame is fixedly connected to a sensing frame that cooperates with the three slotted photoelectric switches.

[0015] Compared with the prior art, the present invention provides an injection molding equipment for nylon pulley blanks, which has the following beneficial effects: 1. The invention has a high degree of automation and improves production efficiency: The equipment integrates a fully automated process of injection molding, mold closing, mold opening, ejection, transfer, material cutting and unloading, which greatly reduces manual intervention and improves production efficiency and continuity.

[0016] 2. The present invention has good molding quality and reduces product appearance defects: Through precise mold closing guide (guide pillar) and mold positioning design (positioning cylinder and positioning pin hole), the mold closing accuracy is ensured, thereby guaranteeing the molding quality of nylon pulley injection molded parts; an automated contour cutter is used to remove excess nylon material, avoiding the burrs produced by traditional manual breaking, and significantly improving the appearance quality of the product.

[0017] 3. The dual-station design of this invention has high production efficiency: the mold adopts a dual-cavity design, which can mold two workpieces at one time and fill them through an optimized injection diversion channel, thereby improving the output rate of a single injection; and the openable mold core design optimizes the convenience of removing the molded nylon pulley injection parts.

[0018] 4. The present invention features automated removal of material bundles (nylon scraps) with high process integration: It integrates a shifting cutting component, and through the automatic switching of three precise workstations (receiving, cutting, and unloading), it realizes the automatic separation and collection of nylon pulley injection molded parts and material bundles (nylon scraps).

[0019] 5. The operation of this invention is safe and labor-intensive: The entire production process, including mold opening and closing, ejection, mold flipping, separation and collection of nylon scrap, and unloading of nylon pulley injection molding, is automatically completed by drive components such as cylinders, oil cylinders, and ball screw linear modules, which reduces the labor intensity and safety hazards of operators.

[0020] 6. The positioning of this invention is precise and the operation is stable and reliable: the cylinders used in many parts of the equipment are equipped with magnetic switches or photoelectric switches, as well as precision guides (such as transverse guide rails and guide rods). The ball screw linear module is also equipped with slotted photoelectric switches, thereby ensuring the accuracy and reliability of the actions of each actuator and guaranteeing the stability of production. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of an injection molding equipment for nylon pulley blanks proposed in this invention; Figure 2 This invention provides an injection molding equipment for nylon pulley blanks. Figure 2 The main view; Figure 3 This is a front view of the lower injection mold of a nylon pulley blank injection molding equipment proposed in this invention; Figure 4 This is a schematic diagram of the openable mold core of the nylon pulley blank injection molding equipment proposed in this invention; Figure 5 This is a schematic diagram of the closed state of the openable mold core of the nylon pulley blank injection molding equipment proposed in this invention; Figure 6 This is a schematic diagram of the pushing component structure of a nylon pulley blank injection molding equipment proposed in this invention; Figure 7 This invention provides an injection molding equipment for nylon pulley blanks. Figure 6 A schematic diagram of the structure on the right side; Figure 8 This is a schematic diagram of the connecting flipping component structure of a nylon pulley blank injection molding equipment proposed in this invention; Figure 9 This is a schematic diagram of the injection mold flipping state of an injection molding equipment for nylon pulley blanks according to the present invention; Figure 10 This invention provides an injection molding equipment for nylon pulley blanks. Figure 9 A schematic diagram of the left side structure; Figure 11 This is a schematic diagram of the stripping assembly structure of a nylon pulley blank injection molding equipment proposed in this invention; Figure 12 This is a schematic diagram of the rotary cutting mechanism of a nylon pulley blank injection molding equipment proposed in this invention; Figure 13 This is a schematic diagram of the position and state of the rotary cutting mechanism in a nylon pulley blank injection molding equipment proposed in this invention; Figure 14 This is a schematic diagram showing the two states of the rotary cutting mechanism in a nylon pulley blank injection molding equipment proposed in this invention; Figure 15 This is a schematic diagram of the three states of the rotary cutting mechanism in a nylon pulley blank injection molding equipment proposed in this invention; Figure 16 This is a schematic diagram of a nylon pulley injection molded part and nylon scrap material in a nylon pulley blank injection molding equipment proposed in this invention.

[0022] In the diagram: 1. Frame; 101. Lower mold support; 102. Mold closing cylinder; 2. Movable lower mold; 3. Pushing assembly; 4. Fixed upper mold; 5. Stripping assembly; 6. Moving cutting assembly; 7. Connecting flipping assembly; 201. Lifting platen; 202. Horizontal guide rail; 203. Injection lower mold; 20301. Assembly slot; 20302. Side support arm; 20303. Stripping plate; 20304. Ejector pin; 20305. Stripping return spring; 2 0306, Opening / closing mold core; 20307, ​​Angled pressure hole; 20308, Angled pressure slide; 20309, Angled pressure return spring; 20310, Injection molding flow divider channel; 20311, Stripping hole; 204, Positioning cylinder; 20401, Positioning pin hole; 301, Pushing cylinder; 302, Pushing frame; 303, Side support; 304, Circular through groove; 305, Clearance groove; 306, Side groove; 401, Fixed template frame; 402, Injection hole; 403, Injection molding... Upper mold; 404, Avoiding lower pressure column; 501, Stripper mounting frame; 502, Stripper lifting cylinder; 503, Guide rod; 504, Stripper lifting frame; 505, Ejector rod; 506, Stripper cylinder; 601, Transfer mounting frame; 602, Rotary cutting mechanism; 60201, Transfer frame; 60202, Connecting plate; 60203, Vertical plate; 60204, Rotary cylinder; 60205, Rotary mold frame; 60207, Transfer mold cavity; 60208, Contour cutting. 60209. Cutting lifting frame; 60210. Cutting lifting cylinder; 603. Ball screw linear module; 604. Slotted photoelectric switch; 605. Waste collection box; 606. Nylon pulley inclined bucket; 607. Transfer guide rail; 701. Side mounting bracket; 702. Drive gear; 703. Driven gear; 704. Driven shaft; 705. Connecting hole; 706. Rotary retaining ring; 707. Connecting cylinder; 708. Drive cylinder; 709. Drive connecting shaft. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0024] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] Please see Figures 1-16 As shown, a nylon pulley blank injection molding equipment includes a frame 1, a fixed upper mold frame 4 is provided on the top of the frame 1, and a movable lower mold frame 2 is provided inside the fixed upper mold frame 4. The fixed upper mold frame 4 includes a fixed template frame 401 that is fixed to the top of the frame 1 by bolts. The upper injection mold 403 is fixed to the inner wall of the top of the fixed template frame 401 by bolts. The movable lower mold frame 2 includes a lifting template 201 that is slidably installed in the fixed template frame 401. The upper surface of the lifting template 201 has two transverse guide rails 202 fixed by bolts. The lower injection mold 203 that cooperates with the upper injection mold 403 is installed between the two transverse guide rails 202. The frame 1 is equipped with a mold closing cylinder 102 that drives the lower injection mold 203 to move and close with the upper injection mold 403. Therefore, by activating the mold closing cylinder 102, the mold closing cylinder 102 extends and drives the lower injection mold 203 to move upward, so that the lower injection mold 203 and the upper injection mold 403 can perform a mold closing action.

[0027] Both sides of the injection mold 203 are fixed with side support arms 20302 by bolts. The cylindrical end of the side support arm 20302 is provided with a vertical bearing seat, and the vertical bearing seat is fixed to the slide table provided on the top of the transverse guide rail 202. Specifically, a positioning pin hole 20401 is provided on one side of the injection mold 203, and a positioning cylinder 204 is fixed to the lower surface of the lifting template 201 by bolts. The piston end of the positioning cylinder 204 can pass through the lifting template 201 and cooperate with the positioning pin hole 20401. Four lower mold frame support members 101 for supporting and positioning the lifting template 201 are fixed to the top of the frame 1 by bolts.

[0028] Since the injection position of the lower injection mold 203 needs to be precisely controlled, the precise positioning of the injection position of the lower injection mold 203 is achieved by the cooperation of the positioning cylinder 204 and the positioning pin hole 20401, and the support and positioning of the lifting template 201 is achieved by the cooperation of multiple lower mold support components 101.

[0029] The upper surface of the lifting template 201 is provided with a pushing component 3 for driving the lower injection mold 203 to move and a connecting flipping component 7 for driving the lower injection mold 203 to flip. The side of the fixed template frame 401 is provided with a stripping component 5 to help the nylon pulley injection molded parts formed in the lower injection mold 203 to be ejected. A shifting cutting assembly 6 is provided at the top of the frame 1 and at a position away from the fixed upper mold frame 4 to cut and separate the molded nylon pulley injection molded parts.

[0030] The top of the injection mold 203 has two assembly slots 20301. Two symmetrically distributed inclined pressure slides 20308 are slidably installed in each of the two assembly slots 20301. One end of each inclined pressure slide 20308 is fixed with an opening / closing mold core 20306 by bolts. The two opposing opening / closing mold cores 20306 and the injection mold 203 form an injection cavity with a nylon pulley. The other end of the inclined pressure slide 20308 passes through the injection mold 203 and is fixed with an inclined pressure return spring 20309 that contacts the side of the injection mold 203 by bolts. The top of the 0308 is provided with a slanted pressure hole 20307, ​​and the top of the injection mold 203 is provided with an injection diversion channel 20310 connecting the two injection cavities. The interior of the injection mold 203 is provided with a stripper plate 20303. Multiple ejector pins 20304 are fixed to the upper surface of the stripper plate 20303 by bolts. The top of the ejector pins 20304 passes through the injection mold 203 and is consistent with the arc contour of the inner wall of the injection cavity and the injection diversion channel 20310. Multiple stripper return springs 20305 are provided between the stripper plate 20303 and the injection mold 203. The bottom of the upper injection mold 403 is provided with a contoured cavity that cooperates with the injection diversion channel 20310 and two injection cavities. The top of the fixed template frame 401 is provided with an injection hole 402 that communicates with the upper injection mold 403 and the injection diversion channel 20310. The bottom of the upper injection mold 403 is provided with a relief pressure column 404 that cooperates with the inclined pressure hole 20307.

[0031] During injection molding, the lower injection mold 203 and the upper injection mold 403 are closed by the mold-closing cylinder 102. Guide pillars at the four corners of the lower and upper injection molds achieve precise mold closing. Meanwhile, the clearance pressure pillar 404 at the bottom of the upper injection mold 403 inserts into the inclined pressure hole 20307. The inclined pressure slide 20308 then compresses and forces the opening and closing mold core 20306 inward, causing the two opposing opening and closing mold cores 20306 to align. At this point, an injection cavity with a nylon pulley is formed between the two opposing opening and closing mold cores 20306 and the lower injection mold 203. The contour cavity at the bottom of the upper injection mold 403 fits into the injection cavity. Then, through the external... The injection molding machine is connected to the injection hole 402, and the injection plastic is injected into the injection cavity through the injection hole 402 and extruded into shape. Since both the upper injection mold 403 and the lower injection mold 203 are equipped with cooling pipes, the cooling of the molded nylon pulley injection part can be greatly accelerated. After injection molding is completed, the lower injection mold 203 and the upper injection mold 403 are opened by the mold closing cylinder 102, and the clearance pressure column 404 is disengaged from the inclined pressure hole 20307. At this time, under the elastic force of the inclined pressure return spring 20309, the inclined pressure slide 20308 drives the opening and closing mold core 20306 to move outward and reset, exposing the molded nylon pulley injection part, which facilitates the subsequent removal operation.

[0032] It should be noted that this molding die is a dual-station die, so there are two nylon pulley injection molded parts after molding. The two injection molded parts are connected by the nylon residue formed by the injection diversion channel 20310, so the nylon residue needs to be removed.

[0033] The existing method of removal involves workers breaking the nylon pulley, which inevitably creates burrs at the broken point of the molded nylon pulley, affecting its appearance. Therefore, automated removal of excess nylon material is needed to achieve better injection molding results.

[0034] The pushing assembly 3 of the present invention includes a pushing cylinder 301 fixed to one side of the lifting template 201 by bolts. One end of the piston rod of the pushing cylinder 301 is fixed to a pushing frame 302 by bolts, and the two ends of the pushing frame 302 are respectively rotatably connected to the cylindrical ends of the two side support arms 20302. The upper surface of the lifting template 201 is fixed with two symmetrically distributed side supports 303 by bolts. The side supports 303 have a side groove 306 inside that matches the oval end of the side support arm 20302. The end of the side groove 306 has a circular through groove 304 that allows the oval end of the side support arm 20302 to rotate and avoid. The side of the lifting template 201 has a relief groove 305 that limits the rotation of the lower injection mold 203 after it is flipped.

[0035] Specifically, by activating the push cylinder 301, the extension of the push cylinder 301 pushes the lower injection mold 203, which is equipped with the side support arm 20302, to move along the transverse guide rail 202 via the push frame 302. Since the cylindrical end of the side support arm 20302 is fixed to the slide table set on the top of the transverse guide rail 202 through the vertical bearing seat, the lower injection mold 203 can only move along the transverse guide rail 202 without longitudinal displacement, until the oval end of the side support arm 20302 moves to the position of the circular through groove 304, at which point the push cylinder 301 stops extending.

[0036] See Figures 6-9 The connecting flipping assembly 7 of the present invention includes a side mounting bracket 701 and a connecting cylinder 707 fixed to one side of the lifting template 201 by bolts. Inside the side mounting bracket 701, a drive gear 702 is rotatably mounted by bearings and a driven shaft 704 is installed through it. A driven gear 703 that meshes with the drive gear 702 is fixed to the outer circumference of the driven shaft 704 by bolts. One end of the piston rod of the connecting cylinder 707 is rotatably connected to the end of the driven shaft 704 by a rotating retainer 706. The other end of the driven shaft 704 has a connecting hole 705 that mates with the oval end of the side support arm 20302. A drive connecting shaft 709 is fixed to one side of the drive gear 702 by bolts. A drive cylinder 708 is hinged to the upper surface of the lifting template 201, and one end of the piston rod of the drive cylinder 708 is rotatably connected to the drive connecting shaft 709.

[0037] At this point, by activating the connecting cylinder 707, the piston rod of the connecting cylinder 707 extends and pushes the driven shaft 704 and the driven gear 703 to move through the rotating retaining ring 706 until the connecting hole 705 at the end of the driven shaft 704 is fitted onto the oval end of the side support arm 20302. At this time, the driven gear 703 always maintains a meshing state with the drive gear 702. Then, the drive cylinder 708 is activated, and the extension of the drive cylinder 708 drives the drive gear 702 to rotate counterclockwise, driving... The counterclockwise rotation of the drive gear 702 drives the driven gear 703 and the driven shaft 704 to rotate clockwise. At this time, the driven shaft 704 drives the side support arm 20302 and the lower injection mold 203 to rotate clockwise through the connecting hole 705 (due to the setting of the rotating retaining ring 706, the rotation of the driven shaft 704 will not interfere with the piston rod of the connecting cylinder 707) until the lower injection mold 203 rotates 90°, at which time the lower injection mold 203 also abuts against the clearance groove 305.

[0038] It should be noted that the width of the driven gear 703 is much larger than the width of the driving gear 702.

[0039] Next, the molded nylon pulley parts and remaining nylon material need to be processed (see reference). Figure 16 To eject: See Figure 10 The bottom of the injection mold 203 is provided with a stripping hole 20311; See Figure 11 The unloading assembly 5 includes an unloading mounting frame 501 that is bolted to the top of the fixed template frame 401. An unloading lifting cylinder 502 is bolted to one side of the unloading mounting frame 501. One end of the piston rod of the unloading lifting cylinder 502 passes through the unloading mounting frame 501 and is bolted to an unloading lifting frame 504. A guide rod 503 that is slidably connected to the unloading mounting frame 501 is bolted to the top of the unloading lifting frame 504. An unloading cylinder 506 is bolted to one side of the unloading lifting frame 504. One end of the piston rod of the unloading cylinder 506 passes through the unloading lifting frame 504 and is bolted to a top rod 505. One end of the top rod 505 can pass through the unloading hole 20311 and contact the unloading plate 20303.

[0040] At this point, the unloading lifting cylinder 502 is activated. The extended unloading lifting cylinder 502, guided by the guide rod 503, drives the unloading lifting frame 504 to move downwards until the top rod 505 is aligned with the unloading hole 20311. Then, the unloading cylinder 506 is activated. The extended unloading cylinder 506 drives the top rod 505 to move, and the top rod 505 passes through the unloading hole 20311 and pushes the unloading plate 20303. At this point, the unloading plate 20303 moves under force and drives the ejector pin 20304 to perform the unloading operation.

[0041] See also Figures 1-2 The shifting cutting assembly 6 of this invention includes a shifting mounting frame 601 fixed to the top of the frame 1 by bolts. Two symmetrically distributed shifting guide rails 607 are fixed to the top of the shifting mounting frame 601 by bolts. A rotary cutting mechanism 602 is slidably mounted between the two shifting guide rails 607 via a slide table (see details for specific structure). Figure 12 One side of the transfer mounting frame 601 is fixed with a ball screw linear module 603 by bolts. The slide of the ball screw linear module 603 is connected to the rotary cutting mechanism 602 through a connecting plate 60202. The transfer mounting frame 601 is equipped with a waste collection box 605 and a nylon pulley inclined bucket 606. The rotary cutting mechanism 602 includes a transfer frame 60201. The bottom of the transfer frame 60201 is fixed with two symmetrically distributed upright plates 60203 by bolts. One side of the upright plate 60203 is fixed with a rotary cylinder 60204 by bolts. The rotating ends of the two rotary cylinders 60204 are fixed with a rotary mold frame 60205 by bolts. The rotary mold frame 60205 has a transfer mold cavity 60207 inside to receive the molded nylon pulley injection molded part. The top of the transfer frame 60201 is fixed with a cutting lifting cylinder 60210 by bolts. One end of the piston rod of the cutting lifting cylinder 60210 passes through the transfer frame 60201 and is fixed with a cutting lifting frame 60209 that is slidably installed with the transfer frame 60201 by bolts. The bottom end of the cutting lifting frame 60209 is fixed with a contour cutter 60208 that cooperates with the rotating mold frame 60205 by bolts.

[0042] It should be noted that the cylinders used in this application are all power actuators that convert the pressure energy of compressed air into mechanical energy. They can be connected to external air pipes and solenoid valves and drive the piston to perform linear reciprocating motion by controlling the gas inlet and outlet. At the same time, they can be used in conjunction with magnetic switches, proximity switches or photoelectric switches to achieve precise control of the cylinder piston rod extension and retraction displacement. Those skilled in the art can set them according to actual needs, which will not be elaborated here.

[0043] Location 1: Position of the nylon pulley injection molded part after transfer molding ( Figure 13 As shown), the rotating mold base 60205 at this position needs to be rotated to a horizontal position so that the side of the rotating mold base 60205 can fit against the side of the injection mold 203 rotated 90°. With the cooperation of the stripping component 5, the molded nylon pulley injection part and nylon residue in the injection cavity of the injection mold 203 are ejected into the transfer mold cavity 60207. Location 2: The location of the cut-off nylon pulley injection molded part ( Figure 14 As shown), the rotating mold base 60205 at this position needs to be rotated to a vertical position, and the transfer mold cavity 60207 needs to face upwards. The rotating mold base 60205 needs to be located above the waste collection box 605. At this position, the cutting lifting cylinder 60210 is activated to drive the cutting lifting frame 60209 and the contour cutter 60208 to move downwards as a whole. The contour cutter 60208 cuts the nylon residue between the two molded nylon pulley injection parts. The cut nylon residue falls into the waste collection box 605 and is collected. Location 3: Position of the nylon pulley injection molded part after blanking and molding ( Figure 15 As shown), the rotating mold frame 60205 at this position needs to be rotated to a vertical position, and the transfer mold cavity 60207 needs to face downwards. The rotating mold frame 60205 needs to be located above the nylon pulley hopper 606. After the rotating cutting mechanism 602 switches from position two to position three, the rotating mold frame 60205 is rotated by the rotating cylinder 60204. At this time, the nylon pulley injection molded part cut and formed in the transfer mold cavity 60207 falls into the nylon pulley hopper 606 under the action of gravity and rolls down the nylon pulley hopper 606 into the conveyor belt. In addition, three slotted photoelectric switches 604 are fixed to one side of the transfer mounting bracket 601 by bolts. The positions of the three slotted photoelectric switches 604 correspond to the positions of the nylon pulley injection molded parts after transfer molding, cut molding, and blanking molding of the rotary cutting mechanism 602, respectively. One end of the transfer frame 60201 is fixed with an induction frame that cooperates with the three slotted photoelectric switches 604 by bolts. The model of the slotted photoelectric switch 604 is: EE-SX671.

[0044] Therefore, by cooperating with the induction frame, the three slotted photoelectric switches 604 can achieve precise switching of the rotary cutting mechanism 602 at different positions.

[0045] The power for driving the switching is the ball screw linear module 603. The ball screw linear module 603 achieves precise linear motion through the coordinated operation of various components: the slide table is the moving part, the ball screw and guide rail constitute the transmission core, the motor and coupling provide power, and the aluminum alloy profile and support base ensure structural stability. Those skilled in the art can set these according to actual needs, which will not be elaborated here.

[0046] The present invention is used in the following steps: S1: During injection molding, the lower injection mold 203 and the upper injection mold 403 are closed by the mold closing cylinder 102. At this time, the guide pillars set at the four corners of the lower injection mold 203 and the upper injection mold 403 achieve precise mold closing, while the clearance pressure pillar 404 set at the bottom of the upper injection mold 403 is inserted into the inclined pressure hole 20307. At this time, the inclined pressure slide 20308 is subjected to pressure and drives the opening and closing mold core 20306 to move inward, thereby making the two opposing opening and closing mold cores 203... 06. Once docking is complete, the two opposing openable mold cores 20306 and the lower injection mold 203 form the injection cavity for the nylon pulley. The contour cavity at the bottom of the upper injection mold 403 fits into the injection cavity. Then, the injection machine is connected to the injection hole 402, and the injection plastic is injected into the injection cavity through the injection hole 402 and extruded into shape. Since both the upper injection mold 403 and the lower injection mold 203 are equipped with cooling pipes, the cooling of the molded nylon pulley injection part can be greatly accelerated. S2: After injection molding is completed, the lower injection mold 203 and the upper injection mold 403 are opened by the mold closing cylinder 102. The lower injection mold 203 moves downward to reset, while the clearance lower pressure column 404 disengages from the inclined pressure hole 20307. At this time, under the elastic force of the inclined pressure reset spring 20309, the inclined pressure slide 20308 drives the opening and closing mold core 20306 to move outward to reset, and exposes the molded nylon pulley injection part. S3: Then start the push cylinder 301. The extension of the push cylinder 301 pushes the injection mold 203 with the side support arm 20302 installed along the transverse guide rail 202 through the push frame 302. Since the cylindrical end of the side support arm 20302 is fixed to the slide table set on the top of the transverse guide rail 202 through the vertical bearing seat, the injection mold 203 can only move along the transverse guide rail 202 without longitudinal displacement, until the oval end of the side support arm 20302 moves to the position of the circular through groove 304, the push cylinder 301 stops extending. S4: At this time, the connecting cylinder 707 is activated, the piston rod of the connecting cylinder 707 extends and pushes the driven shaft 704 and the driven gear 703 to move through the rotating retaining ring 706 until the connecting hole 705 at the end of the driven shaft 704 is fitted onto the oval end of the side support arm 20302. At this time, the driven gear 703 always maintains a meshing state with the drive gear 702. Then the drive cylinder 708 is activated, the extension of the drive cylinder 708 drives the drive gear 702 to rotate counterclockwise, and the counterclockwise rotation of the drive gear 702 drives the driven gear 703 and the driven shaft 704 to rotate clockwise. At this time, the driven shaft 704 drives the side support arm 20302 and the lower injection mold 203 to rotate clockwise through the connecting hole 705 until the lower injection mold 203 rotates 90°. At this time, the lower injection mold 203 also abuts against the relief groove 305. S5: Then, the rotary cutting mechanism 602 is moved to "position one" by the ball screw linear module 603. At this time, the stripping lifting cylinder 502 is activated. The stripping lifting cylinder 502 extends and drives the stripping lifting frame 504 to move downward under the guidance of the guide rod 503 until the ejector rod 505 is aligned with the stripping hole 20311. At this time, the stripping cylinder 506 is activated. The stripping cylinder 506 extends and drives the ejector rod 505 to move, and the ejector rod 505 passes through the stripping hole 20311 and pushes the stripping plate 20303. At this time, the stripping plate 20303 is moved by force and drives the ejector pin 20304 to perform stripping operation, so that the molded nylon pulley injection part and nylon excess material in the injection cavity of the lower injection mold 203 are ejected into the transfer mold cavity 60207. S6: Then, the ball screw linear module 603 moves the rotary cutting mechanism 602 to "position two". At this time, the cutting lifting cylinder 60210 is activated to drive the cutting lifting frame 60209 and the contour cutter 60208 to move downward as a whole. The contour cutter 60208 cuts the nylon scrap between the two molded nylon pulley injection parts. The cut nylon scrap falls into the waste collection box 605 for collection. Then, the cutting lifting cylinder 60210 shortens and drives the cutting lifting frame 60209 and the contour cutter 60208 to move upward and reset. S7: Then, the rotary cutting mechanism 602 is moved to "position three" by the ball screw linear module 603. After the rotary cutting mechanism 602 switches from position two to position three, the rotary cylinder 60204 performs the rotation operation of the rotary mold frame 60205. At this time, the cut and molded nylon pulley injection part in the transfer mold cavity 60207 falls into the nylon pulley hopper 606 under the action of gravity and rolls down the nylon pulley hopper 606 into the conveyor belt. S8: At this point, the injection molding of the nylon pulley blank and the automated cutting and separation of the nylon pulley and nylon scrap are completed.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A nylon pulley blank injection molding equipment, comprising a frame (1), characterized in that, The top of the frame (1) is provided with a fixed upper mold frame (4), and a movable lower mold frame (2) is provided inside the fixed upper mold frame (4). The fixed upper mold frame (4) includes a fixed template frame (401) fixedly connected to the top of the frame (1). An injection upper mold (403) is fixedly connected to the inner top wall of the fixed template frame (401). The movable lower mold frame (2) includes a lifting template (201) slidably installed in the fixed template frame (401). Two transverse guide rails (202) are fixedly connected to the upper surface of the lifting template (201). An injection lower mold (203) that cooperates with the injection upper mold (403) is installed between the two transverse guide rails (202). The frame (1) is equipped with a mold closing cylinder (102) inside, which drives the lower injection mold (203) to move and close with the upper injection mold (403). The upper surface of the lifting template (201) is provided with a pushing component (3) for driving the lower injection mold (203) to move and a connecting flipping component (7) for driving the lower injection mold (203) to flip. The side of the fixed template frame (401) is provided with a stripping component (5) to help the nylon pulley injection molded parts formed in the lower injection mold (203) to be ejected. At the top of the frame (1) and away from the fixed upper mold frame (4), there is a shifting cutting assembly (6) for cutting and separating the molded nylon pulley injection molded parts.

2. The nylon pulley blank injection molding equipment according to claim 1, characterized in that, The top of the injection mold (203) has two assembly slots (20301). Two symmetrically distributed inclined pressure slides (20308) are slidably installed in each of the two assembly slots (20301). One end of each inclined pressure slide (20308) is fixedly connected to an opening and closing mold core (20306). The two opposing opening and closing mold cores (20306) and the injection mold (203) form an injection cavity with a nylon pulley. The other end of the inclined pressure slide (20308) passes through the injection mold (203) and is fixedly connected to an inclined pressure return spring (20309) that contacts the side of the injection mold (203). The top of the injection mold (208) is provided with a slanted pressure hole (20307). The top of the injection mold (203) is provided with an injection diversion channel (20310) connecting the two injection cavities. The injection mold (203) is provided with a stripper plate (20303) inside. Multiple ejector pins (20304) are fixedly connected to the upper surface of the stripper plate (20303). The top of the ejector pins (20304) passes through the injection mold (203) and is consistent with the arc contour of the inner wall of the injection cavity and the injection diversion channel (20310). Multiple stripper return springs (20305) are provided between the stripper plate (20303) and the injection mold (203). The bottom of the upper injection mold (403) is provided with a contoured cavity that cooperates with the injection diversion channel (20310) and two injection cavities. The top of the fixed template frame (401) is provided with an injection hole (402) that communicates with the upper injection mold (403) and the injection diversion channel (20310). The bottom of the upper injection mold (403) is provided with a relief pressure column (404) that cooperates with the inclined pressure hole (20307).

3. The nylon pulley blank injection molding equipment according to claim 1, characterized in that, Both sides of the injection mold (203) are fixedly connected with side support arms (20302). The cylindrical end of the side support arm (20302) is provided with a vertical bearing seat, and the vertical bearing seat is fixed to the slide table provided on the top of the transverse guide rail (202). The lower injection mold (203) has a positioning pin hole (20401) on one side. The lower surface of the lifting template (201) is fixedly connected to a positioning cylinder (204), and the piston end of the positioning cylinder (204) can pass through the lifting template (201) and cooperate with the positioning pin hole (20401).

4. The nylon pulley blank injection molding equipment according to claim 3, characterized in that, The pushing assembly (3) includes a pushing cylinder (301) fixedly connected to one side of the lifting template (201). One end of the piston rod of the pushing cylinder (301) is fixedly connected to a pushing frame (302), and both ends of the pushing frame (302) are rotatably connected to the cylindrical ends of the two side arms (20302). The upper surface of the lifting template (201) is fixedly connected to two symmetrically distributed side supports (303). The side supports (303) have a side groove (306) inside that matches the oval end of the side support arm (20302). The end of the side groove (306) has a circular through groove (304) for rotating and avoiding the oval end of the side support arm (20302). The lifting template (201) has a relief groove (305) on one side for limiting the flipped injection mold (203).

5. The nylon pulley blank injection molding equipment according to claim 3, characterized in that, The connecting tilting assembly (7) includes a side mounting bracket (701) fixedly connected to one side of the lifting template (201) and a connecting cylinder (707). Inside the side mounting bracket (701), a drive gear (702) is rotatably mounted via bearings, and a driven shaft (704) is threaded through it. A driven gear (703) meshing with the drive gear (702) is fixedly connected to the outer circumference of the driven shaft (704). One end of the piston rod of the connecting cylinder (707) is connected via… The rotating snap ring (706) is rotatably connected to the end of the driven shaft (704). The other end of the driven shaft (704) is provided with a connecting hole (705) that matches the oval end of the side support arm (20302). A drive connecting shaft (709) is fixedly connected to one side of the drive gear (702). A drive cylinder (708) is hinged to the upper surface of the lifting template (201), and one end of the piston rod of the drive cylinder (708) is rotatably connected to the drive connecting shaft (709).

6. The nylon pulley blank injection molding equipment according to claim 2, characterized in that, The bottom of the injection mold (203) is provided with a stripping hole (20311). The unloading assembly (5) includes an unloading mounting frame (501) fixedly connected to the top of the fixed template frame (401). An unloading lifting cylinder (502) is fixedly connected to one side of the unloading mounting frame (501). One end of the piston rod of the unloading lifting cylinder (502) passes through the unloading mounting frame (501) and is fixedly connected to the unloading lifting frame (504). A guide rod (503) that is slidably connected to the unloading mounting frame (501) is fixedly connected to the top of the unloading lifting frame (504). An unloading cylinder (506) is fixedly connected to one side of the unloading lifting frame (504). One end of the piston rod of the unloading cylinder (506) passes through the unloading lifting frame (504) and is fixedly connected to the top rod (505). One end of the top rod (505) can pass through the unloading hole (20311) and contact the unloading plate (20303).

7. The nylon pulley blank injection molding equipment according to claim 1, characterized in that, The top of the frame (1) is fixedly connected to four lower mold support members (101) for supporting and positioning the lifting template (201).

8. The nylon pulley blank injection molding equipment according to claim 1, characterized in that, The shifting cutting assembly (6) includes a shifting mounting frame (601) fixedly connected to the top of the frame (1). Two symmetrically distributed shifting guide rails (607) are fixedly connected to the top of the shifting mounting frame (601). A rotary cutting mechanism (602) is slidably installed between the two shifting guide rails (607) via a slide table. A ball screw linear module (603) is fixedly connected to one side of the shifting mounting frame (601). The slide table of the ball screw linear module (603) is connected to the rotary cutting mechanism (602) via a connecting plate (60202). The shifting mounting frame (601) is equipped with a waste collection box (605) and a nylon pulley inclined bucket (606).

9. The nylon pulley blank injection molding equipment according to claim 8, characterized in that, The rotary cutting mechanism (602) includes a transfer frame (60201), with two symmetrically distributed vertical plates (60203) fixedly connected to the bottom of the transfer frame (60201). A rotary cylinder (60204) is fixedly connected to one side of the vertical plate (60203), and a rotary mold frame (60205) is fixedly connected between the rotating ends of the two rotary cylinders (60204). The rotary mold frame (60205) has a transfer mold cavity (60207) inside to receive the molded nylon pulley injection molded part. The top of the transfer frame (60201) is fixedly connected to a cutting lifting cylinder (60210). One end of the piston rod of the cutting lifting cylinder (60210) passes through the transfer frame (60201) and is fixedly connected to a cutting lifting frame (60209) that is slidably installed with the transfer frame (60201). The bottom end of the cutting lifting frame (60209) is fixedly connected to a contour cutter (60208) that cooperates with the rotating mold frame (60205).

10. The nylon pulley blank injection molding equipment according to claim 9, characterized in that, Three slotted photoelectric switches (604) are fixedly connected to one side of the transfer mounting frame (601). The positions of the three slotted photoelectric switches (604) correspond to the positions of the nylon pulley injection molded parts after transfer molding, the nylon pulley injection molded parts after cutting molding, and the nylon pulley injection molded parts after blanking molding, respectively, of the rotary cutting mechanism (602). One end of the transfer frame (60201) is fixedly connected to a sensing frame that cooperates with the three slotted photoelectric switches (604).

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