Plastic chair back mold stripping mechanism

Abstract

The application relates to the technical field of mold stripping, in particular to a plastic chair back mold stripping mechanism, which comprises a workbench, a lower mold base is fixedly arranged on the workbench, an upper mold base is arranged above the lower mold base, a waste recovery seat is fixedly arranged below the workbench, a stripping mechanism is slidably arranged in the lower mold base, a transmission frame is rotatably connected to a top frame, a chair back overflow edge trimming mechanism is slidably arranged on the transmission frame, the chair back overflow edge trimming mechanism is arranged, after the stripping mechanism lifts up the plastic chair back, the trimming and polishing rod is driven by the transmission frame to rotate around the plastic chair back when self-rotating, the overflow edge around the plastic chair back is treated, the time for manually cleaning the waste can be saved, the air is sprayed downward through the air guide pipe, the trimmed overflow edge can be effectively blown into the lower receiving seat, the waste recovery efficiency is effectively improved, the waste accumulation is avoided, and the production environment is improved.

Description

Technical Field

[0001] This invention relates to the field of mold demolding technology, and in particular to a demolding mechanism for a plastic chair back mold. Background Technology

[0002] The design of the demolding mechanism in a plastic chair back mold is crucial for ensuring high efficiency, precision, and minimizing waste in the production process. The main function of the demolding mechanism is to smoothly remove the injection-molded plastic chair back from the mold, preventing deformation, damage, or excess waste. Effective utilization and recycling of plastic waste is also an indispensable part of the production process. Plastic recycling is of great significance in modern injection molding production, especially with increasing environmental awareness and the growing demand for resource recycling. During injection molding, particularly in large-scale production, waste and defective products, such as overflow and scrap, are often generated. Traditionally, these wastes are often discarded, leading to resource waste and environmental pollution. To achieve a more efficient and sustainable production model, more and more manufacturing companies are beginning to focus on the recycling and reuse of plastic waste.

[0003] The prior art publication CN102161226B provides a demolding mechanism for a plastic chair back mold, in which the chair back is set obliquely in the mold, and an ejection mechanism is set obliquely at the same time. The ejector rod of the ejection mechanism corresponds to the fixing hole of the chair back, making it easy to demold the fixing hole, with small mold height, less mold material, and low cost.

[0004] In existing technologies, during the mold production of plastic chair backs, overflow edges are generated at the corners. However, current technologies are not convenient for automatically cleaning these overflow edges or recycling the waste material. Therefore, manual intervention may be required for cleaning during each production run, leading to reduced production efficiency, increased labor costs, and potential impacts on subsequent processes if cleaning is incomplete. Furthermore, existing technologies do not address the issue of an effective waste recycling system. When overflow edges are generated during the production of plastic chair backs, this waste is often discarded, resulting in a waste of raw materials, affecting resource utilization efficiency, and increasing the environmental burden.

[0005] In summary, the existing technology lacks a method for automatically handling overflow material from plastic chair backs and for recycling waste materials. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the prior art by proposing a demolding mechanism for plastic chair back molds.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a demolding mechanism for a plastic chair back mold, comprising a worktable, a lower mold base fixedly mounted on the worktable, an upper mold base above the lower mold base, a waste material recycling seat fixedly mounted below the worktable, a demolding mechanism slidably fitted inside the lower mold base, two material receiving seats slidably fitted on the worktable, a top frame fixedly connected to one of the material receiving seats, a transmission frame rotatably connected to the top frame, and a chair back overflow edge trimming mechanism slidably fitted on the transmission frame.

[0008] Preferably, a hydraulic rod is fixedly connected to one end of the upper mold base, the hydraulic rod is fixedly connected to the worktable, and a pusher is fixedly connected to one side of the upper mold base.

[0009] Preferably, two guide pipes are fixedly connected through the top of the waste recycling seat, and the guide pipes are fixedly connected through the worktable and the lower mold base.

[0010] Preferably, the demolding mechanism includes a chair back demolding frame, which is slidably connected to the lower mold base. A contact plate is fixedly connected to the bottom end of the chair back demolding frame. One side of the contact plate is in movable contact with the push frame. Multiple springs are fixedly connected to the contact plate. The other end of the springs is fixedly connected to the lower mold base. A transmission roller is rotatably connected to one side of the contact plate. A perforated plastic chair back is placed on the chair back demolding frame.

[0011] Preferably, the bottom surface of the receiving seat is slidably in contact with the top surface of the lower mold base, a sliding frame is fixedly connected to one end of the receiving seat, a plurality of rollers are rotatably connected to the bottom end of the sliding frame, the rollers are slidably in contact with the worktable, a transmission groove is provided on the sliding frame, the transmission groove is composed of a straight part and an inclined part, the inner wall of the transmission groove is slidably in contact with the outer wall of the transmission roller, and the inner wall of the receiving seat is inclined.

[0012] Preferably, one end of the top frame is fixedly connected to an annular rack.

[0013] Preferably, a motor is fixedly connected to one end of the transmission frame, and a worm gear is fixedly connected to the output end of the motor through the transmission frame. A gear shaft is fixedly connected to one end of the worm gear, and a worm wheel is meshed and driven on one side of the worm gear. The worm wheel is rotatably connected to the transmission frame via a pin, and a drive wheel is fixedly connected above the worm wheel. The drive wheel meshes and drives a ring rack.

[0014] Preferably, the backrest overflow trimming mechanism includes a slide block, which is slidably coupled to a transmission frame. A universal joint is rotatably connected through the slide block. A transmission wheel is fixedly connected to the top of the universal joint, and the transmission wheel meshes with a gear shaft for transmission. A trimming and polishing rod is fixedly connected to the bottom of the universal joint. The outer wall of the trimming and polishing rod is in frictional contact with the perimeter of the perforated plastic backrest. A drive wheel is fixedly connected near the bottom of the universal joint.

[0015] Preferably, a tension spring is fixedly connected to one side of the slide, and the other end of the tension spring is fixedly connected to the inner wall of the transmission frame. An air guide pipe is fixedly connected to the lower surface of the slide, and a rotating shaft is rotatably connected to the inner wall of the air inlet end of the air guide pipe. A fan blade is fixedly connected to one end of the rotating shaft, and a driven wheel is fixedly connected to the other end of the rotating shaft. The driven wheel meshes with the driving wheel for transmission.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting up a backrest overflow trimming mechanism, after the demolding mechanism lifts the plastic chair back, the transmission frame drives the trimming and grinding rod to rotate around the plastic chair back during its rotation, thus treating the overflow edges around the plastic chair back. This saves time compared to manual waste cleaning. The automated trimming process allows the overflow trimming and demolding processes to be carried out simultaneously, reducing the production cycle and improving overall production efficiency. At the same time, it drives the fan blades to rotate, and the air sprayed downwards through the air duct effectively blows the trimmed overflow edges into the receiving seat below, ensuring timely waste removal and preventing waste from scattering in the production environment. This effectively improves waste recycling efficiency, avoids waste accumulation, and enhances the cleanliness of the production environment.

[0018] 2. By setting up a demolding mechanism, the upper mold base can move upwards simultaneously, driving the chair back demolding frame to automatically move upwards and lift the plastic chair back to achieve automatic demolding. No manual intervention is required during the demolding process, saving manual operation time. This shortens the production cycle and is especially suitable for mass production scenarios. It not only improves production efficiency and reduces labor costs, but also ensures product quality, reduces safety hazards, and improves the overall intelligence level of the production line through automation, resulting in significant production benefits.

[0019] 3. When the chair back demolding frame moves upward, it will automatically move the two receiving seats to the bottom of the plastic chair back. Together with the waste recycling seat, the overflow edge processed by the chair back overflow edge trimming mechanism will be recycled, which will significantly optimize the production process. The automation of waste recycling not only reduces waste and environmental pollution, but also improves production efficiency, reduces production costs, and improves product quality, making the production process more efficient, environmentally friendly, and intelligent, with strong economic and environmental benefits. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the demolding mechanism for a plastic chair back mold according to the present invention during demolding;

[0021] Figure 2 This is a schematic diagram of the upper mold base structure of a plastic chair back mold demolding mechanism according to the present invention;

[0022] Figure 3 This is a cross-sectional schematic diagram of the waste recycling seat structure of a plastic chair back mold demolding mechanism according to the present invention;

[0023] Figure 4 This is a schematic diagram of the demolding mechanism and other structures of a plastic chair back mold demolding mechanism according to the present invention;

[0024] Figure 5 This is a schematic diagram of the receiving seat structure of a plastic chair back mold demolding mechanism according to the present invention;

[0025] Figure 6 This is a schematic diagram of the top frame and other structures of a plastic chair back mold demolding mechanism according to the present invention;

[0026] Figure 7 This is a schematic diagram of the transmission frame structure of a plastic chair back mold demolding mechanism according to the present invention;

[0027] Figure 8 This is a partial cross-sectional schematic diagram of the backrest overflow trimming mechanism of a plastic chair back mold demolding mechanism according to the present invention.

[0028] The diagram shows: 1. Workbench; 2. Lower mold base; 3. Upper mold base; 4. Scrap material collection seat; 5. Demolding mechanism; 6. Receiving seat; 7. Top frame; 8. Transmission frame; 9. Chair back overflow trimming mechanism; 301. Hydraulic rod; 302. Push frame; 401. Guide tube; 501. Chair back demolding frame; 502. Spring; 503. Transmission roller; 504. Contact plate; 601. Sliding frame; 602. 603. Roller; 704. Transmission groove; 805. Ring rack; 806. Motor; 807. Worm; 808. Gear shaft; 809. Worm wheel; 8000. Drive wheel; 901. Slide; 902. Universal joint; 903. Transmission wheel; 904. Trimming and grinding rod; 905. Drive wheel; 906. Tension spring; 907. Air guide pipe; 908. Fan blade; 909. Driven wheel; 910. Shaft. Detailed Implementation

[0029] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0030] like Figures 1-8The demolding mechanism for a plastic chair back mold shown includes a worktable 1, a lower mold base 2 fixedly mounted on the worktable 1, an upper mold base 3 above the lower mold base 2, a waste material recycling seat 4 fixedly mounted below the worktable 1, a demolding mechanism 5 slidably fitted inside the lower mold base 2, two material receiving seats 6 slidably fitted on the worktable 1, a top frame 7 fixedly connected to one of the material receiving seats 6, a transmission frame 8 rotatably connected to the top frame 7, and a chair back overflow edge trimming mechanism 9 slidably fitted on the transmission frame 8.

[0031] like Figure 2 As shown, a hydraulic rod 301 is fixedly connected to one end of the upper mold base 3, and the hydraulic rod 301 is fixedly connected to the worktable 1. A pusher frame 302 is fixedly connected to one side of the upper mold base 3.

[0032] like Figure 3 As shown, two guide pipes 401 are fixedly connected through the top of the waste recycling seat 4. The guide pipes 401 are fixedly connected through the worktable 1 and the lower mold seat 2.

[0033] like Figure 4 As shown, the demolding mechanism 5 includes a chair back demolding frame 501, which is slidably connected to the lower mold base 2. A contact plate 504 is fixedly connected to the bottom end of the chair back demolding frame 501. One side of the contact plate 504 is in movable contact with the push frame 302. Multiple springs 502 are fixedly connected to the contact plate 504, and the other end of the springs 502 is fixedly connected to the lower mold base 2. A transmission roller 503 is rotatably connected to one side of the contact plate 504. A perforated plastic chair back is placed on the chair back demolding frame 501. The springs 502 can drive the chair back demolding frame 501 to automatically move down and reset. The hydraulic rod 301 drives the connected upper mold base 3 to move up. At this time, the upper mold base 3 will drive the connected push frame 302 to move up. Then, when the push frame 302 contacts the contact plate 504, it will drive it to move up as well, and then drive the chair back demolding frame 501 connected to the contact plate 504 to move up.

[0034] like Figure 5As shown, the bottom surface of the receiving seat 6 is in sliding contact with the top surface of the lower mold base 2. A sliding frame 601 is fixedly connected to one end of the receiving seat 6. Multiple rollers 602 are rotatably connected to the bottom end of the sliding frame 601. The rollers 602 are in sliding contact with the worktable 1. A transmission groove 603 is formed on the sliding frame 601. The transmission groove 603 consists of a straight part and an inclined part. The inner wall of the transmission groove 603 is in sliding contact with the outer wall of the transmission roller 503. The inner wall of the receiving seat 6 is inclined. The rollers 602 can reduce the friction generated during sliding, thereby reducing the energy consumption of the system. In equipment that needs to operate continuously, reducing friction means higher energy efficiency and reducing the burden on the power system. During the upward movement of the chair back demolding frame 501, the transmission roller 503 connected to it will move from the straight part of the transmission groove 603 to the inclined part. At this time, it will drive the sliding frame 601 to move, so that the sliding frame 601 drives the connected receiving seat 6 to move under the plastic chair back.

[0035] like Figure 6 As shown, a ring rack 701 is fixedly connected to one end of the top frame 7.

[0036] like Figure 7 As shown, a motor 801 is fixedly connected to one end of the transmission frame 8. The output end of the motor 801 passes through the transmission frame 8 and is fixedly connected to a worm gear 802. A gear shaft 803 is fixedly connected to one end of the worm gear 802. A worm wheel 804 is meshed with the worm gear 802 on one side. The worm wheel 804 is rotatably connected to the transmission frame 8 via a pin. A drive wheel 805 is fixedly connected above the worm wheel 804. The drive wheel 805 meshes with a ring rack 701. When the motor 801 drives the connected worm gear 802 to rotate, the worm gear 802 drives the worm wheel 804 to rotate, which in turn drives the connected drive wheel 805 to rotate. The drive wheel 805 then meshes with the ring rack 701, thereby driving the transmission frame 8 to rotate.

[0037] like Figure 8 As shown, the backrest trimming mechanism 9 includes a slide 901, which is slidably fitted with a transmission frame 8. A universal joint 902 is rotatably connected through the slide 901. A transmission wheel 903 is fixedly connected to the top of the universal joint 902, and the transmission wheel 903 meshes with a gear shaft 803 for transmission. A trimming and polishing rod 904 is fixedly connected to the bottom of the universal joint 902. The outer wall of the trimming and polishing rod 904 is in frictional contact with the perimeter of the perforated plastic backrest. A drive wheel 905 is fixedly connected near the bottom of the universal joint 902. The worm gear 802 drives the connected gear shaft 803 to rotate, which in turn drives the transmission wheel 903 to rotate, which in turn drives the trimming and polishing rod 904 connected to the universal joint 902 to rotate.

[0038] A tension spring 906 is fixedly connected to one side of the slide 901, and the other end of the tension spring 906 is fixedly connected to the inner wall of the transmission frame 8. An air guide pipe 907 is fixedly connected to the lower surface of the slide 901. A rotating shaft 910 is rotatably connected to the inner wall of the air inlet end of the air guide pipe 907. A fan blade 908 is fixedly connected to one end of the rotating shaft 910, and a driven wheel 909 is fixedly connected to the other end of the rotating shaft 910. The driven wheel 909 is engaged with the driving wheel 905 for transmission. When the universal joint 902 drives the connected trimming and grinding rod 904 to rotate, it will drive the connected driving wheel 905 to rotate, so that the driving wheel 905 can drive the driven wheel 909 to rotate, so that the driven wheel 909 can drive the fan blade 908 connected to the rotating shaft 910 to rotate, so that the fan blade 908 can draw outside air into the air guide pipe 907 and spray it out through the air guide pipe 907.

[0039] By setting up a backrest overflow trimming mechanism 9, after the demolding mechanism 5 lifts the plastic chair back, the transmission frame 8 drives the trimming and grinding rod 904 to rotate around the plastic chair back during its rotation, thus treating the overflow edges around the plastic chair back. This saves time compared to manual waste cleaning. The automated trimming process allows the overflow trimming and demolding processes to be carried out simultaneously, reducing the production cycle and improving overall production efficiency. At the same time, it drives the fan blade 908 to rotate, and the air is sprayed downwards through the air pipe 907, effectively blowing the trimmed overflow edges into the receiving seat 6 below. This ensures that the waste is cleaned up in a timely manner and does not scatter in the production environment, effectively improving the waste recycling efficiency, avoiding waste accumulation, and improving the cleanliness of the production environment.

[0040] Working principle: When demolding the plastic chair back mold, the hydraulic rod 301 drives the connected upper mold base 3 to move upward. At this time, the upper mold base 3 will drive the connected push frame 302 to move upward. Then, when the push frame 302 contacts the contact plate 504, it will drive it to move upward. Then, it will drive the chair back demolding frame 501 connected to the contact plate 504 to move upward, thereby lifting the plastic chair back in the lower mold base 2 to complete the demolding.

[0041] Meanwhile, as the chair back demolding frame 501 moves upward, the transmission roller 503 connected to it will move from the straight part of the transmission groove 603 to the inclined part. At this time, it will drive the sliding frame 601 to move, so that the sliding frame 601 will drive the connected receiving seat 6 to move below the plastic chair back.

[0042] At this time, under the action of the tension spring 906, the trimming and polishing rod 904 will be attached to the plastic chair back. Then, the motor 801 drives the connected worm gear 802 to rotate. The worm gear 802 will drive the worm wheel 804 to rotate, which will drive the connected drive wheel 805 to rotate. Then, the drive wheel 805 will mesh with the ring rack 701, which will drive the transmission frame 8 to rotate, and drive the trimming and polishing rod 904 to rotate around the plastic chair back.

[0043] Then the worm gear 802 will drive the connected gear shaft 803 to rotate, so that the gear shaft 803 can drive the transmission wheel 903 to rotate, so that the transmission wheel 903 can drive the trimming and polishing rod 904 connected to the universal joint 902 to rotate, and treat the overflow edge around the plastic chair back.

[0044] When the universal joint 902 drives the connected trimming and grinding rod 904 to rotate, it will drive the connected drive wheel 905 to rotate, so that the drive wheel 905 can drive the driven wheel 909 to rotate, so that the driven wheel 909 can drive the fan blade 908 connected to the rotating shaft 910 to rotate, so that the fan blade 908 can draw the outside air into the air guide pipe 907 and spray it out through the air guide pipe 907, blowing the overflow edge processed by the trimming and grinding rod 904 into the receiving seat 6, and then the overflow edge falls into the waste recycling seat 4 through the guide pipe 401 for collection.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A demolding mechanism for a plastic chair back mold, comprising a worktable (1), characterized in that: A lower mold base (2) is fixedly installed on the workbench (1). An upper mold base (3) is installed above the lower mold base (2). A waste recycling seat (4) is fixedly installed below the workbench (1). A demolding mechanism (5) is slidably fitted inside the lower mold base (2). Two material receiving seats (6) are slidably fitted on the workbench (1). A top frame (7) is fixedly connected to one of the material receiving seats (6). A transmission frame (8) is rotatably connected to the top frame (7). A chair back overflow trimming mechanism (9) is slidably fitted on the transmission frame (8). A hydraulic rod (301) is fixedly connected to one end of the upper mold base (3). The pressure rod (301) is fixedly connected to the worktable (1). A pusher frame (302) is fixedly connected to one side of the upper mold base (3). The demolding mechanism (5) includes a chair back demolding frame (501). The chair back demolding frame (501) and the lower mold base (2) are slidably connected through each other. A contact plate (504) is fixedly connected to the bottom end of the chair back demolding frame (501). One side of the contact plate (504) is in movable contact with the pusher frame (302). Multiple springs (502) are fixedly connected to the contact plate (504). The other end of the springs (502) is fixedly connected to the lower mold base (2). One side of the contact plate (504) is rotatably connected to... A transmission roller (503) is provided. A perforated plastic chair back is placed on the chair back demolding frame (501). The chair back overflow trimming mechanism (9) includes a slide (901). The slide (901) is slidably engaged with the transmission frame (8). A universal joint (902) is rotatably connected through the slide (901). A transmission wheel (903) is fixedly connected to the top of the universal joint (902). The transmission wheel (903) meshes with the gear shaft (803). A trimming and polishing rod (904) is fixedly connected to the bottom of the universal joint (902). The outer wall of the trimming and polishing rod (904) is in frictional contact with the periphery of the perforated plastic chair back. A drive wheel (905) is fixedly connected to the universal joint (902) near the bottom. A tension spring (906) is fixedly connected to one side of the slide (901). The other end of the tension spring (906) is fixedly connected to the inner wall of the transmission frame (8). An air guide pipe (907) is fixedly connected to the lower surface of the slide (901). A rotating shaft (910) is rotatably connected to the inner wall of the air inlet end of the air guide pipe (907). A fan blade (908) is fixedly connected to one end of the rotating shaft (910). A driven wheel (909) is fixedly connected to the other end of the rotating shaft (910). The driven wheel (909) meshes with the drive wheel (905) for transmission.

2. The demolding mechanism for a plastic chair back mold according to claim 1, characterized in that: The top of the waste recycling seat (4) is fixedly connected to two guide pipes (401), and the guide pipes (401) are fixedly connected to the workbench (1) and the lower mold base (2).

3. The demolding mechanism for a plastic chair back mold according to claim 1, characterized in that: The bottom surface of the receiving seat (6) is slidably in contact with the top surface of the lower mold base (2). A sliding frame (601) is fixedly connected to one end of the receiving seat (6). Multiple rollers (602) are rotatably connected to the bottom end of the sliding frame (601). The rollers (602) are slidably in contact with the worktable (1). A transmission groove (603) is opened on the sliding frame (601). The transmission groove (603) is composed of two parts: a straight line and an inclined line. The inner wall of the transmission groove (603) is slidably in contact with the outer wall of the transmission roller (503). The inner wall of the receiving seat (6) is inclined.

4. The demolding mechanism for a plastic chair back mold according to claim 1, characterized in that: One end of the top frame (7) is fixedly connected to an annular rack (701).

5. The demolding mechanism for a plastic chair back mold according to claim 4, characterized in that: A motor (801) is fixedly connected to one end of the transmission frame (8). The output end of the motor (801) passes through the transmission frame (8) and is fixedly connected to a worm (802). A gear shaft (803) is fixedly connected to one end of the worm (802). A worm wheel (804) is meshed and driven on one side of the worm (802). The worm wheel (804) is rotatably connected to the transmission frame (8) through a pin. A drive wheel (805) is fixedly connected above the worm wheel (804). The drive wheel (805) meshes and drives with a ring rack (701).

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