Plastic forming machine convenient for waste cleaning

Abstract

The utility model relates to a plastic forming machine convenient for cleaning waste materials. The plastic forming machine is characterized by comprising a supporting table for supporting a plastic plate. A through hole used for punching operation is formed in the supporting table, and an air hole communicated with the through hole is formed in the supporting table. The air inlet of the air pump arranged on one side of the air hole is communicated with the air hole, and the air pressure value in the through hole can be reduced under the action of the air pump. According to the design, by means of the air pressure difference, when the punching rod moves downwards after punching operation is completed, punching waste is automatically sucked out of the punching rod. In addition, the lower side of the through hole is specially provided with a blocking block I which realizes reciprocating up-and-down circulating motion through a longitudinal driving mechanism. The design can adapt to different working states, it is ensured that punching waste can be effectively sucked out of the punching rod after punching operation, it is also ensured that the plastic plate can be sucked in the non-punching state, and therefore positioning of the plastic plate is assisted.

Description

Technical Field

[0001] This utility model relates to the field of plastic molding machine technology, and in particular to a plastic molding machine that facilitates waste removal. Background Technology

[0002] In the production process of plastic products, such as beverage cup lids, coffee cup lids, and medicine and food trays, the commonly used molding and manufacturing methods include: first, placing the plastic sheet on the feeding rack, then softening the plastic sheet through a heating device, then blow molding in a blow molding device, and finally cutting and shaping through a stamping and cutting device to output the finished product.

[0003] In actual production, the punching and cutting process of plastic sheets mainly relies on the operation of the punching rod. It is worth noting that, in order to meet the punching requirements and increase local stress, the punching rod is usually designed as a hollow structure. However, this design has a drawback: the plastic waste after punching tends to accumulate in the internal cavity of the punching rod, increasing the difficulty of cleaning.

[0004] Therefore, this study proposes a new design concept for a plastic molding machine, the core purpose of which is to provide operators with an efficient solution for cleaning plastic waste from the internal cavity of the stamping rod. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention proposes a plastic molding machine that facilitates waste removal. This machine has a significant advantage: it can effectively clean the waste material inside the cavity of the stamping rod. This design effectively solves the problems in existing technologies, avoiding the need for operators to manually and laboriously clean the waste material inside the cavity of the stamping rod.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A plastic molding machine for easy waste removal includes a support platform on which a plastic sheet is placed. The support platform has vertically oriented through holes and horizontally oriented air holes that communicate with the through holes. An air pump is located on one side of each air hole, with its inlet connected to the air hole. A sealing mechanism is located below the through hole, comprising a blocking block I made of elastic material. When the blocking block I is inside the through hole, it is interference-fitted with the through hole. A longitudinal drive mechanism is located above the blocking block I, causing it to reciprocate vertically.

[0008] Preferably, a transfer mechanism is also provided between the air pump and the support platform. The transfer mechanism includes an adjusting pipe with vertical axis, and a connecting pipe is respectively connected to the left and right sides of the adjusting pipe. The far ends of the two connecting pipes are respectively connected to the air hole and the air pump inlet. A blocking block II is slidably connected inside the adjusting pipe. A driving rod is fixedly connected to the upper end of the blocking block II. The upper end of the driving rod protrudes from the adjusting pipe. A compression spring I is provided at the lower end of the blocking block II. The two axial ends of the compression spring I abut against the blocking block II and the inner wall of the adjusting pipe, respectively.

[0009] Preferably, the longitudinal drive mechanism includes a slide rod with a T-shaped structure in the vertical plane. The smaller diameter end of the slide rod is fixedly connected to the blocking block I. Furthermore, a groove is provided on the support platform for the slide rod. The larger diameter part of the slide rod is embedded in the groove. A compression spring II is embedded in the groove. The two axial ends of the compression spring II abut against the larger diameter part of the slide rod and the inner wall of the support platform, respectively.

[0010] Preferably, a follower rod is fixedly connected to the lower end of the blocking block II, the lower end of the follower rod protruding from the adjusting tube, and a rope wheel is provided on one side of the follower rod, with a pull rope wound around the side end of the rope wheel. One end of the pull rope is fixedly connected to the part of the follower rod protruding from the adjusting tube. A driven rod is fixedly connected to the lower end of the blocking block I, and the other end of the pull rope is fixedly connected to the driven rod. Furthermore, the follower rod and the driven rod move in opposite directions.

[0011] Preferably, when the compression spring I and compression spring II are not affected by external force, the connecting pipe portion and the blocking block II are on the same horizontal plane, and the blocking block I and the through hole are not on the same horizontal plane.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention utilizes an air pump positioned on one side of the air hole, whose inlet is connected to the air hole, to reduce the internal air pressure. This design allows the pressure difference to draw out the punching waste from the punching rod during its downward movement after punching. Furthermore, a blocking block I is specially designed on the lower side of the air hole, which reciprocates vertically via a longitudinal drive mechanism. This design adapts to different working conditions, ensuring effective removal of punching waste from the punching rod after punching and enabling the adsorption of plastic sheets during non-punching operations, thus aiding in the positioning of the plastic sheets. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the overall structure of the support platform of this utility model.

[0016] Figure 3 This is a schematic diagram of the internal structure of the support platform of this utility model.

[0017] Figure 4 This is a schematic diagram showing the positional relationship between the drive rod and the follower of this utility model.

[0018] Figure 5 This is a schematic diagram of the internal structure of the regulating tube of this utility model.

[0019] Figure 6 This is a schematic diagram showing the cooperation relationship between the follower and the driven rod of this utility model.

[0020] In the diagram: 1. Air pump; 2. Adjusting pipe; 3. Follower rod; 4. Support platform; 5. Through hole; 6. Rope pulley; 7. Pull rope; 8. Air hole; 9. Slide groove; 10. Compression spring II; 11. Slide rod; 12. Blocking block I; 13. Drive rod; 14. Connecting pipe; 15. Blocking block II; 16. Compression spring I; 17. Follower rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0023] See Figure 1 A plastic molding machine that facilitates waste removal is consistent with existing technology devices, but it includes a support platform 4 for supporting plastic sheets.

[0024] Notably, support platform 4 features a T-shaped design with multiple rollers arranged along the front-to-back axis at both ends. During actual operation, the plastic sheet comes into contact with the rollers, effectively reducing friction during rotation and protecting the sheet from damage.

[0025] In addition, the support platform 4 is specially designed with through holes 5 in the upper and lower axes. The presence of these through holes 5 greatly facilitates the discharge of waste materials and improves cleaning efficiency.

[0026] It is particularly important to emphasize that in practical applications, a punching rod is typically mounted above the plastic sheet. This punching rod is hollow and has a longitudinal reciprocating mechanism at its upper end. Through this mechanism, the punching rod can achieve reciprocating vertical linear motion. During this process, the punching rod presses against the plastic sheet (the punching rod penetrates the through hole 5), using shearing force to complete the hole-making operation. After the plastic sheet has been perforated, the cut circular plastic sheet will naturally fall into the formed through hole 5.

[0027] See Figure 1 , Figure 3 The unique feature of this device compared to existing technologies is that its support platform 4 is perforated with axial air holes 8, which are connected to through holes 5 to ensure smooth airflow. By precisely controlling the airflow direction inside the through holes 5 and the air holes 8, the air pressure inside the through holes 5 can be made lower than the external atmospheric pressure. This allows the plastic disc carried by the stamping rod to effectively detach from the stamping rod after entering the through holes 5 due to the air pressure difference between the through holes 5 and the inner cavity of the stamping rod, ensuring that it does not interfere with subsequent punching operations.

[0028] Therefore, an air pump 1 is installed on one side of the air hole 8. By ensuring the communication between the air inlet of the air pump 1 and the air hole 8, the air pump 1 is used to precisely control the airflow direction inside the through hole 5 and the air hole 8.

[0029] To further enhance the pressure reduction effect inside the through-hole 5 and ensure the plastic disc can be smoothly extracted from the inner cavity of the stamping rod, a sealing mechanism is added below the through-hole 5. This mechanism is responsible for tightly sealing the lower side of the through-hole 5. Combined with the sealing effect of the stamping rod on the upper side of the through-hole 5, the air pressure inside the through-hole 5 can be continuously reduced when the air pump 1 is running, thereby increasing the pressure difference between the inside of the through-hole 5 and the inner cavity of the stamping rod.

[0030] In detail, such as Figure 3 , Figure 6 As shown, the sealing mechanism consists of a blocking block I12 with elastic properties. By design, the diameter of the blocking block I12 is larger than the diameter of the through hole 5, ensuring that when the blocking block I12 is located inside the through hole 5, an interference fit is formed between it and the through hole 5, thereby achieving effective sealing of the through hole 5.

[0031] In addition, to effectively separate the plastic disc from the through hole 5 and prevent excessive accumulation of the plastic disc within the through hole 5, a longitudinal drive mechanism is specially added above the blocking block I12. This mechanism drives the blocking block I12 to perform regular up-and-down reciprocating motion, thereby periodically blocking and opening the through hole 5. When the stamping process starts, this mechanism begins to continuously reduce the air pressure inside the through hole 5; when the stamping ends, it opens the through hole 5 to facilitate the smooth discharge of the plastic disc.

[0032] It is worth noting that, such as Figure 3 As shown, when the blocking block I12 is at the lowest point of its stroke, the blocking block I12 and the support platform 4 are not on the same horizontal plane. In this state, the plastic disc can be discharged through the gap between the blocking block I12 and the support platform 4.

[0033] Specifically, the longitudinal drive mechanism consists of a slide rod 11, which is fixedly connected to the blocking block I 12. A groove 9 is provided on the support platform 4 to accommodate the slide rod 11 and restrict its movement. By installing a compression spring II 10 at the upper end of the slide rod 11, and ensuring that both ends of the spring are in contact with the larger diameter portion of the slide rod 11 and the inner wall of the support platform 4 respectively, a continuous downward pushing force is applied to the slide rod 11 (blocking block I 12). Under this mechanism, the reciprocating up-and-down cyclic movement of the blocking block I 12 can be achieved simply by periodically applying an upward pulling force to overcome the elastic force of the compression spring II 10.

[0034] Furthermore, the device is designed so that the projection of the slide rod 11 in the vertical direction is T-shaped, and the larger diameter end of the slide rod 11 is located inside the groove 9. By utilizing the difference in diameter of the slide rod 11, the movement trajectory of the slide rod 11 can be effectively controlled, thereby precisely controlling the position of the blocking block I 12.

[0035] In actual operation, the descent of the stamping rod is considered the stamping process, which takes a certain amount of time. Therefore, during this stage, the plastic sheet will move synchronously to punch holes at different positions.

[0036] To prevent excessive pressure from atmospheric pressure on the plastic sheet due to low air pressure inside the through hole 5 when the stamping rod descends and the plastic sheet moves, thus hindering its movement, a transfer mechanism is added between the air pump 1 and the support platform 4.

[0037] Please see Figure 1 , Figure 4 , Figure 5 In detail, the transfer mechanism consists of an adjusting pipe 2 with vertical axis, and a connecting pipe 14 is connected to the left and right sides of the adjusting pipe 2. The far ends of the two connecting pipes 14 are connected to the air hole 8 and the air inlet of the air pump 1, respectively, to ensure smooth airflow from the air pump 1 to the air hole 8.

[0038] In addition, the regulating pipe 2 is equipped with a sliding blocking block II 15. By adjusting its position, the inner cavity of the connecting pipe 14 can be blocked, the air outlet channel of the air hole 8 can be changed, and the air pressure drop rate in the through hole 5 can be adjusted as needed.

[0039] Specifically, please refer to Figure 5 The upper end of the blocking block II 15 is fixedly connected to the drive rod 13, and the upper end of the drive rod 13 protrudes from the adjustment tube 2, which facilitates the position control of the drive rod 13 (blocking block II 15).

[0040] Furthermore, to prevent damage to the device from causing the internal air pressure of the through hole 5 to remain below atmospheric pressure and interfere with the normal production process, a compression spring I16 is fixedly installed at the lower end of the blocking block II15. The two ends of the spring are in close contact with the blocking block (which should be blocking block II15 here; assuming the original text's blocking block I12 is a typo) and the inner wall of the regulating pipe 2, respectively. The compression spring I16 provides a continuous upward thrust to the blocking block II15, ensuring that the blocking block II15 can automatically rise and effectively block the inner cavity of the connecting pipe 14 when no external force is applied to the drive rod 13.

[0041] It should be pointed out that, such as Figure 1 , Figure 5 As shown, under normal working conditions (i.e., when the blocking block II 15 blocks the connecting pipe 14), the upper end of the drive rod 13 is higher than the upper end of the support platform 4. This design facilitates cooperation with the actual longitudinal reciprocating mechanism. When the stamping rod moves down to the preset position, the longitudinal reciprocating mechanism can drive the stamping rod and the drive rod 13 to move down synchronously. At this time, the blocking block II 15 completely releases the blocking state on the inner cavity of the connecting pipe 14, causing the air pressure inside the through hole 5 to drop rapidly.

[0042] Furthermore, to ensure that the blocking block I 12 can block the through hole 5 when the gas escape rate inside the vent 8 increases, and to fully realize the rapid reduction of the gas pressure inside the through hole 5, the device has a follower rod 3 fixedly connected to the lower end of the blocking block II 15, and the lower end of the follower rod 3 protrudes from the regulating tube 2.

[0043] In addition, a pulley 6 is provided on one side of the follower rod 3. A pull rope 7 is wound around the side end of the pulley 6, and one end of the pull rope 7 is fixedly connected to the part of the follower rod 3 that protrudes from the adjusting tube 2.

[0044] Meanwhile, the lower end of the blocking block I 12 is fixedly connected to the driven rod 17, and the other end of the pull rope 7 is fixedly connected to the driven rod 17. The pull rope 7 is designed so that the follower rod 3 moves in the opposite direction to the driven rod 17. When the drive rod 13 descends, the blocking block I 12 rises to block the through hole 5.

[0045] To fix the position of the plastic plate and prevent it from moving, the compression spring remains in its natural state when there is no external force. The connecting pipe 14 is horizontal with the blocking block II 15, while the blocking block I 12 is not horizontal with the through hole 5.

[0046] In the practical application of this utility model:

[0047] First, when the corresponding stamping rod reaches the highest point of its stroke, the air pressure inside the through hole 5 is slightly lower than atmospheric pressure, the plastic plate is adsorbed on the support platform 4, and the blocking block I12 and the support platform 4 are not on the same horizontal plane.

[0048] Subsequently, driven by the longitudinal reciprocating mechanism, the stamping rod continues to move downward in a straight line. During this process, the distance between the stamping rod, the plastic plate, and the drive rod 13 gradually shortens.

[0049] Next, when the stamping rod drives the drive rod 13 to descend, the blocking block II 15 moves down and the blocking block I 12 moves up. The compression spring I 16 and the compression spring II 10 are compressed and store energy. At the same time, a small gap appears between the stamping rod and the plastic plate.

[0050] Then, the punch rod continues to move downward until it reaches the lowest point of its stroke to complete the punching operation. During this process, the air pressure inside the through hole 5 continues to decrease, and the plastic disc produced by punching separates from the punch rod.

[0051] Finally, driven by the longitudinal reciprocating mechanism, the stamping rod slowly rises. At the same time, the elastic potential energy stored in the compression springs I16 and II10 is released, causing the air pressure in the through hole 5 to gradually increase until it stabilizes.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic molding machine for easy waste removal, comprising a support platform (4), a plastic sheet placed on the upper side of the support platform (4), and the support platform (4) having through holes (5) extending vertically, characterized in that: The support platform (4) is also provided with air holes (8) extending through the left and right axes. The air holes (8) are connected to the through holes (5). Furthermore, an air pump (1) is provided on one side of the air hole (8), and the air inlet of the air pump (1) is connected to the air hole (8). A blocking mechanism is provided on the lower side of the through hole (5). The blocking mechanism includes a blocking block I (12) which is made of elastic material. When the blocking block I (12) is located inside the through hole (5), the blocking block I (12) is in an interference fit with the through hole (5). The upper side of the blocking block I (12) is provided with a longitudinal drive mechanism, and the blocking block I (12) performs reciprocating up-and-down cyclic motion through the longitudinal drive mechanism.

2. The plastic molding machine for easy waste removal according to claim 1, characterized in that: A transfer mechanism is also provided between the air pump (1) and the support platform (4). The transfer mechanism includes an adjusting pipe (2) with an upper and lower axis. Furthermore, a connecting pipe (14) is connected to the left and right sides of the side end of the adjusting pipe (2). The far ends of the two connecting pipes (14) are connected to the air hole (8) and the air inlet of the air pump (1), respectively. A blocking block II (15) is slidably connected inside the regulating tube (2), and a driving rod (13) is fixedly connected to the upper end of the blocking block II (15). The upper end of the driving rod (13) protrudes out of the regulating tube (2). A compression spring I (16) is provided at the lower end of the blocking block II (15), and the two axial ends of the compression spring I (16) abut against the inner wall of the blocking block II (15) and the regulating tube (2), respectively.

3. The plastic molding machine for easy waste removal according to claim 2, characterized in that: The longitudinal drive mechanism includes a slide rod (11) with a T-shaped structure in the vertical plane. The smaller diameter end of the slide rod (11) is fixedly connected to the blocking block I (12). Furthermore, a groove (9) is provided on the support platform (4) for the slide rod (11), and the larger diameter part of the slide rod (11) is embedded in the groove (9). A compression spring II (10) is embedded in the groove (9). The two axial ends of the compression spring II (10) abut against the larger diameter part of the slide rod (11) and the inner wall of the support platform (4), respectively.

4. The plastic molding machine for easy waste removal according to claim 3, characterized in that: The lower end of the blocking block II (15) is fixedly connected to a follower rod (3), the lower end of the follower rod (3) protrudes from the adjusting tube (2), and a rope wheel (6) is provided on one side of the follower rod (3), and a pull rope (7) is wound around the side end of the rope wheel (6), and one end of the pull rope (7) is fixedly connected to the part of the follower rod (3) protruding from the adjusting tube (2); The lower end of the blocking block I (12) is fixedly connected to the driven rod (17), the other end of the pull rope (7) is fixedly connected to the driven rod (17), and the follower rod (3) moves in the opposite direction to the driven rod (17).

5. The plastic molding machine for easy waste removal according to claim 4, characterized in that: When the compression spring I (16) and compression spring II (10) are not affected by external force, the connecting pipe (14) part is on the same horizontal plane as the blocking block II (15), and the blocking block I (12) and the through hole (5) are not on the same horizontal plane.

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