A device for trimming the corners of a blow molded race model

Abstract

The utility model relates to the field of blow molding, especially a race model blow molding piece corner trimming device. Including guide rail frame, the sliding frame is set up in the sliding of guide rail frame, be provided with the translation mechanism on the guide rail frame, the translation mechanism is used for driving the sliding frame to shift, the hollow tube is set up in the interval sliding of sliding frame top, the first spring is connected between hollow tube bottom and sliding frame inner bottom, the air pipe is installed on the sliding frame, the hollow tube communicates with the air pipe, the limiting mechanism is set up on the sliding frame, the limiting mechanism is used for limiting the hollow tube, the air -permeable board is installed on the hollow tube, the air -permeable board is provided with the shelter mechanism. The utility model discloses through setting translation mechanism, drive mechanism and two axle mobile platform, cooperate negative pressure adsorption positioning system, realized the positioning and trimming of blow molding piece raw edge, greatly reduced the manual intervention, effectively solved the problem of low traditional manual trimming efficiency, especially applicable to the demand of model quick batch processing in the preparatory stage of the event.

Description

Technical Field

[0001] This utility model relates to the field of blow molding, and in particular to a device for trimming the edges and corners of blow-molded parts for competition models. Background Technology

[0002] In various model competitions, the appearance precision, structural integrity, and surface finish of the entries are often important indicators for judging their craftsmanship and competitive performance. To meet the manufacturing requirements of lightweight, high efficiency, and low cost, most competition models are currently mass-produced using blow molding. Blow molding has advantages such as short molding cycle, relatively low mold cost, and suitability for manufacturing complex hollow structural parts, and is therefore widely used in the production of shell-type parts for competition models. However, during the blow molding process, due to the unavoidable tiny gaps at the mold parting line, molten plastic is prone to overflow from the parting surface under high pressure, resulting in continuous or discontinuous burrs on the edges of the product. These burrs not only affect the appearance quality of the model but may also interfere with subsequent assembly, painting, or functional testing. In severe cases, they can even cause the model to lose points in competitions due to minor flaws. Therefore, efficient and precise edge trimming of blow-molded parts has become an indispensable key process in the model manufacturing process.

[0003] Currently, the industry mainly relies on manual operation to handle the burrs on blow-molded parts. This involves workers manually trimming the edges with tools such as cutters, pliers, or sandpaper. While this method offers some flexibility, the quality of the trimming is highly dependent on the operator's skill level and subjective judgment, making it difficult to guarantee consistency between batches. Furthermore, manual trimming is inefficient and cannot meet the demand for rapid model delivery during the event preparation stage. In addition, the long hours of repetitive work result in high labor intensity, which can easily lead to occupational fatigue and even the risk of work-related injuries. Utility Model Content

[0004] In view of this, the present invention provides a tool for trimming the edges and corners of blow-molded parts of competition models, which can solve the shortcomings of low efficiency, poor consistency and high labor intensity of manual trimming in the prior art.

[0005] The technical solution is as follows: A corner trimming device for blow-molded parts of a competition model includes a guide rail frame, a sliding frame slidably mounted on the guide rail frame, a translation mechanism mounted on the guide rail frame for driving the sliding frame to translate, hollow tubes slidably mounted at intervals on the sliding frame, a first spring connecting the bottom of the hollow tubes to the bottom of the inner side of the sliding frame, a vent pipe installed on the sliding frame, the hollow tubes communicating with the vent pipes, a limit mechanism mounted on the sliding frame for limiting the hollow tubes, a vent plate mounted on the hollow tubes, a blocking mechanism mounted on the vent plate for blocking the vent plate, a drive mechanism mounted on the guide rail frame, a trimming knife connected to the drive mechanism for driving the trimming knife to move and rotate.

[0006] Preferably, the translation mechanism includes a first motor and a lead screw. The first motor is mounted on the guide rail frame, and the lead screw is connected to the output shaft of the first motor. The lead screw is threadedly connected to the sliding frame.

[0007] Preferably, the limiting mechanism includes guide plates, a sliding frame, and a tensioning bolt. Guide plates are spaced apart inside the sliding frame, and a sliding frame is slidably arranged between the guide plates. The sliding frame is used to contact the hollow tube. A tensioning bolt is threaded on the side of the sliding frame, and the tensioning bolt is rotatably connected to the sliding frame.

[0008] Preferably, the shielding mechanism includes a baffle, a movable rod, and a semi-circular bead. The baffle is rotatably installed at the bottom of the ventilated plate, and the movable rod is slidably installed through the middle of the ventilated plate. The movable rod slides through the middle of the baffle, and an arc-shaped groove is opened on the movable rod. A semi-circular bead is provided on the baffle, and the semi-circular bead slides in the arc-shaped groove.

[0009] Preferably, the drive mechanism includes a two-axis moving platform and a second motor. The two-axis moving platform is mounted on the guide rail frame, and the second motor is mounted on the moving platform of the two-axis moving platform. The trimming knife is connected to the output shaft of the second motor.

[0010] Preferably, the top of the movable rod is higher than the top of the hollow tube to ensure that the blow-molded part can contact the movable rod.

[0011] Preferably, a barrier frame is also included, with the top of the sliding frame equipped with a barrier frame, which is used to block burrs and debris.

[0012] Preferably, it also includes rubber strips, which are spaced apart on the sliding frame and are used to contact the hollow tube.

[0013] Preferably, a sealing ring is also included, with a sealing ring installed on the top of the hollow tube, which is used to seal between the hollow tube and the blow-molded part.

[0014] Preferably, a second spring is also included, with the bottom of the movable rod connected to the hollow tube. The second spring is used to drive the movable rod to reset.

[0015] The beneficial effects of this utility model are: 1. By setting up a translation mechanism, a driving mechanism and a two-axis moving platform, and in conjunction with a negative pressure adsorption positioning system, this utility model realizes the positioning and trimming of the rough edges of blow-molded parts, greatly reducing manual intervention and effectively solving the problem of low efficiency in traditional manual trimming. It is particularly suitable for the need for rapid batch processing of models during the event preparation stage.

[0016] 2. The shielding mechanism of this utility model adopts a movable rod linkage baffle structure. The ventilation plate through hole is automatically opened only when the blow-molded part is placed in place to form a negative pressure adsorption. At other times, the through hole is closed by the baffle, which effectively prevents the burrs and debris generated during the trimming process from entering the hollow tube, reducing the difficulty of equipment maintenance and extending the service life.

[0017] 3. The hollow tube of this utility model can sink independently under the pressure of the blow-molded part and lock its position through the limiting mechanism to form a "memory" positioning point. Subsequent models of the same specifications can be directly and accurately placed according to the position of the sunken hollow tube without re-alignment, which greatly simplifies the repeated feeding operation process and improves the continuity of operation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the translation mechanism of this utility model.

[0020] Figure 3 This is a three-dimensional structural diagram of the sliding frame, hollow tube, and vent tube of this utility model.

[0021] Figure 4 This is a three-dimensional structural diagram of the hollow tube, the first spring, and the vent pipe of this utility model.

[0022] Figure 5 This is a three-dimensional structural diagram of the limiting mechanism of this utility model.

[0023] Figure 6 This is a three-dimensional structural diagram of the hollow tube, the vent plate, and the movable rod of this utility model.

[0024] Figure 7 This is a three-dimensional structural diagram of the baffle, movable rod, and second spring of this utility model.

[0025] Figure 8 This is a structural separation diagram of the baffle, movable rod, and arc groove of this utility model.

[0026] Figure 9 This is a three-dimensional structural diagram of the baffle and semi-circular bead of this utility model.

[0027] Explanation of reference numerals in the attached drawings: 1. Guide rail frame; 2. Sliding frame; 301. First motor; 302. Lead screw; 4. Hollow tube; 5. First spring; 6. Vent pipe; 701. Guide plate; 702. Sliding frame; 703. Tightening bolt; 8. Vent plate; 901. Baffle; 902. Movable rod; 903. Arc groove; 904. Semi-circular ball; 1001. Two-axis moving platform; 1002. Second motor; 11. Trimming knife; 12. Barrier frame; 13. Rubber strip; 14. Sealing ring; 15. Second spring. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Example: A device for trimming the edges of blow-molded parts for competition models, see below. Figures 1-9 As shown, the system includes a guide rail frame 1; it also includes a sliding frame 2, a translation mechanism, a hollow tube 4, a first spring 5, a vent pipe 6, a limiting mechanism, a vent plate 8, a shielding mechanism, a driving mechanism, and a trimming knife 11; the sliding frame 2 is slidably mounted on the upper side of the guide rail frame 1; the translation mechanism is mounted on the guide rail frame 1 to drive the sliding frame 2 to translate; hollow tubes 4 are slidably mounted at even intervals on the upper side of the sliding frame 2; a first spring 5 connects the bottom of the hollow tube 4 to the bottom of the inner side of the sliding frame 2; a vent pipe 6 is installed on the lower side of the inner side of the sliding frame 2, and the hollow tube 4... The hollow tube 4 is connected to the vent pipe 6, and the right end of the vent pipe 6 is provided with a docking interface for connecting with the air pump; the sliding frame 2 is provided with a limit mechanism for limiting the hollow tube 4; a vent plate 8 is installed on the upper side inside the hollow tube 4, and the vent plate 8 has through holes spaced apart for gas flow; a blocking mechanism is provided on the vent plate 8 for blocking the through holes on the vent plate 8; a drive mechanism is installed on the guide rail frame 1, and a trimming knife 11 is connected to the drive mechanism for driving the trimming knife 11 to move and rotate.

[0030] See Figure 1 and Figure 2 As shown, the translation mechanism includes a first motor 301 and a lead screw 302; the first motor 301 is installed in the middle of the rear side of the guide rail frame 1; the lead screw 302 is rotatably installed in the middle of the upper side of the guide rail frame 1, the rear end of the lead screw 302 is connected to the output shaft of the first motor 301, and the lead screw 302 is threadedly connected to the sliding frame 2.

[0031] See Figure 5 As shown, the limiting mechanism includes a guide plate 701, a sliding frame 702, and a tightening bolt 703; the guide plates 701 are evenly spaced on the inner side of the sliding frame 2; the sliding frame 702 is slidably arranged between the bottom of the guide plates 701, and the sliding frame 702 is used to contact the hollow tube 4, thereby using friction to limit the hollow tube 4; the left side of the sliding frame 2 is threaded with a tightening bolt 703, and the right end of the tightening bolt 703 is rotatably connected to the sliding frame 702.

[0032] See Figures 6-9As shown, the shielding mechanism includes a baffle 901, a movable rod 902, and a semi-circular bead 904. The baffle 901 is rotatably mounted on the bottom of the ventilated plate 8. The baffle 901 has interspersed circular holes, which are staggered with the through holes on the ventilated plate 8. The movable rod 902 is slidably inserted through the middle of the ventilated plate 8. The top of the movable rod 902 is higher than the top of the hollow tube 4, ensuring that the blow-molded part can contact the movable rod 902 first when placed on the top of the hollow tube 4. The movable rod 902 slides through the middle of the baffle 901. An arc-shaped groove 903 is provided on the upper outer side of the movable rod 902. The semi-circular bead 904 is provided on the baffle 901 and slides within the arc-shaped groove 903.

[0033] See Figure 1 As shown, the drive mechanism includes a two-axis moving platform 1001 and a second motor 1002; the two-axis moving platform 1001 is mounted on the guide rail frame 1; the second motor 1002 is mounted on the moving platform of the two-axis moving platform 1001, and the trimming knife 11 is connected to the output shaft of the second motor 1002.

[0034] In use, the blow-molded part is first placed on top of the sliding frame 2, so that the blow-molded part is positioned between the tops of the hollow tubes 4. When the blow-molded part contacts the top of the movable rod 902, the blow-molded part will squeeze the movable rod 902 downwards, causing the movable rod 902 to rotate by squeezing the semi-circular ball 904 through the arc groove 903. This will drive the baffle 901 to rotate, aligning the round hole on the baffle 901 with the through hole of the vent plate 8. This ensures that the blow-molded part can be sucked in by negative pressure in the hollow tube 4. Any misaligned through holes will be blocked by the baffle 901 to prevent burrs and debris from entering the hollow tube 4 during subsequent trimming of the blow-molded part, causing cleaning difficulties. (Each hollow tube 4 has an independent blocking mechanism at its top, so that only the through hole of the vent plate 8 corresponding to the hollow tube 4 pressed down by the blow-molded part is open, while the others remain closed.) After the blow-molded part is pressed on top of the hollow tube 4, the blow-molded part... The plastic part will squeeze the corresponding hollow tube 4 downwards, compressing the corresponding first spring 5. Then, the tightening bolt 703 will be turned, causing the tightening bolt 703 to drive the sliding frame 702 to move to the right, so that the sliding frame 702 contacts and adheres tightly to the hollow tube 4. The sliding frame 702 limits the hollow tube 4 through friction, thus preventing the descending hollow tube 4 from returning to its original position. This facilitates positioning and placement based on the descending hollow tube 4 during subsequent repeated feeding. Next, the air inlet of the air pump is connected to the air pipe 6, and the air pump is started to extract the air from the air pipe 6 and the hollow tube 4, creating a negative pressure inside the hollow tube 4 to suck in the blow molded part, thereby limiting the blow molded part and ensuring its stability during subsequent trimming. In particular, it prevents the blow molded part from being displaced or shaken by the trimming tool due to its thin walls and light weight, thus ensuring trimming accuracy and operational safety.

[0035] After the blow-molded part is positioned, the second motor 1002 is started, which drives the trimming blade 11 to rotate. Then, the first motor 301 drives the lead screw 302 to rotate or reverse, causing the lead screw 302 to move the sliding frame 2 forward or backward, thereby adjusting the position of the sliding frame 2, the hollow tube 4, and the blow-molded part until the blow-molded part is adjusted to the designated position. Then, the two-axis moving platform 1001 drives the second motor 1002 and the trimming blade 11 to move, so that the trimming blade 11 trims the burrs on the blow-molded part, thereby realizing automatic burr trimming of the blow-molded part.

[0036] After the blow-molded parts have been trimmed, turn off the second motor 1002 to stop the trimming knife 11 from rotating. Then turn off the air pump to restore the air pressure in the air pipe 6 and the hollow pipe 4 to normal, so that the blow-molded parts are released from the top of the hollow pipe 4. Then take the blow-molded parts with trimmed edges out from the top of the hollow pipe 4. Then place the next blow-molded parts of the same batch back on the lowered hollow pipe 4. Repeat the above operation to trim the edges of the blow-molded parts of the same batch again.

[0037] Once all blow-molded parts in the same batch have undergone burr trimming, the movable rod 902 is pulled upwards to reset, causing it to press the semi-circular ball 904 through the arc groove 903 for reverse reset. This causes the baffle 901 to reverse reset, realigning the round holes on the baffle 901 with the through holes of the vent plate 8. Then, the loosening bolt 703 is turned to reverse reset, causing it to move the sliding frame 702 to the left, thus separating the sliding frame 702 from the hollow tube 4. This releases the sliding frame 702 from the hollow tube 4, allowing the corresponding first spring 5 to return to its original state. The first spring 5 then moves the corresponding hollow tube 4 upwards to reset.

[0038] See Figure 1 As shown, it also includes a barrier frame 12; the top edge of the sliding frame 2 is equipped with a barrier frame 12. By setting the barrier frame 12, the rough edge debris can be effectively blocked, so that the rough edge debris falls on the top of the sliding frame 2, which not only maintains the cleanliness of the working environment, but also makes it convenient for the operator to clean it up.

[0039] See Figure 5 As shown, it also includes rubber strips 13; rubber strips 13 are spaced apart on the sliding frame 702, and the contact between the rubber strips 13 and the hollow tube 4 can increase the resistance of the hollow tube 4, thereby further ensuring that the descending hollow tube 4 cannot be reset.

[0040] See Figure 7As shown, it also includes a sealing ring 14; the top of the hollow tube 4 is equipped with a sealing ring 14, which can seal the top of the hollow tube 4 and the bottom of the blow molded part, thereby effectively preventing external air from seeping in from the gap during the negative pressure adsorption process, ensuring that the hollow tube 4 maintains a stable negative pressure state, and improving the adsorption firmness and positioning reliability of the blow molded part.

[0041] See Figure 7 As shown, it also includes a second spring 15; the bottom of the movable rod 902 is connected to the hollow tube 4 by the second spring 15. When the blow-molded part squeezes the movable rod 902 and moves it downward, the second spring 15 is compressed. When the blow-molded part separates from the movable rod 902, the second spring 15 returns to its original state. The second spring 15 drives the movable rod 902 to move upward and reset, so that the movable rod 902 squeezes the semi-circular ball 904 through the arc groove 903 to reverse and reset, thereby driving the baffle 901 to reverse and reset, so that the round hole on the baffle 901 is re-distributed with the through hole of the vent plate 8. In this way, the movable rod 902 can be automatically reset, reducing the operator's manual operation.

[0042] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A device for trimming the edges and corners of blow-molded parts for competition models, comprising a guide rail frame (1), characterized in that, A sliding frame (2) is slidably mounted on the guide rail frame (1). A translation mechanism is mounted on the guide rail frame (1) to drive the sliding frame (2) to translate. Hollow tubes (4) are slidably mounted on the sliding frame (2) at intervals. A first spring (5) is connected between the bottom of the hollow tube (4) and the bottom of the inner side of the sliding frame (2). A vent pipe (6) is mounted on the sliding frame (2). The hollow tube (4) is connected to the vent pipe (6). A limit mechanism is mounted on the sliding frame (2) to limit the hollow tube (4). A breathable plate (8) is mounted on the hollow tube (4). A blocking mechanism is mounted on the breathable plate (8) to block the breathable plate (8). A drive mechanism is mounted on the guide rail frame (1). A trimming knife (11) is connected to the drive mechanism to drive the trimming knife (11) to move and rotate.

2. The edge trimming device for blow-molded parts of a competition model according to claim 1, characterized in that, The translation mechanism includes a first motor (301) and a lead screw (302). The first motor (301) is mounted on the guide rail frame (1), and the lead screw (302) is connected to the output shaft of the first motor (301). The lead screw (302) is threadedly connected to the sliding frame (2).

3. The edge trimming device for blow-molded parts of a competition model according to claim 1, characterized in that, The limiting mechanism includes a guide plate (701), a sliding frame (702) and a tightening bolt (703). The guide plate (701) is spaced apart inside the sliding frame (2), and the sliding frame (702) is slidably arranged between the guide plates (701). The sliding frame (702) is used to contact the hollow tube (4). The tightening bolt (703) is threaded on the side of the sliding frame (2), and the tightening bolt (703) is rotatably connected to the sliding frame (702).

4. The edge trimming device for blow-molded parts of a competition model according to claim 1, characterized in that, The shielding mechanism includes a baffle (901), a movable rod (902), and a semi-circular bead (904). The baffle (901) is rotatably installed at the bottom of the ventilated plate (8). The movable rod (902) is slidably installed through the middle of the ventilated plate (8). The movable rod (902) slides through the middle of the baffle (901). An arc groove (903) is opened on the movable rod (902). A semi-circular bead (904) is provided on the baffle (901). The semi-circular bead (904) slides in the arc groove (903).

5. The edge trimming device for blow-molded parts of a competition model according to claim 1, characterized in that, The drive mechanism includes a two-axis moving platform (1001) and a second motor (1002). The two-axis moving platform (1001) is mounted on the guide rail frame (1). The second motor (1002) is mounted on the moving platform of the two-axis moving platform (1001). The trimming knife (11) is connected to the output shaft of the second motor (1002).

6. The edge trimming device for blow-molded parts of a competition model according to claim 4, characterized in that, The top of the movable rod (902) is higher than the top of the hollow tube (4) to ensure that the blow molded part can contact the movable rod (902).

7. The edge trimming device for blow-molded parts of a competition model according to claim 1, characterized in that, It also includes a barrier frame (12), the top of the sliding frame (2) is equipped with a barrier frame (12), the barrier frame (12) is used to block rough edges and slag.

8. The edge trimming device for blow-molded parts of a competition model according to claim 3, characterized in that, It also includes rubber strips (13), and rubber strips (13) are spaced apart on the sliding frame (702). The rubber strips (13) are used to contact the hollow tube (4).

9. The edge trimming device for blow-molded parts of a competition model according to claim 1, characterized in that, It also includes a sealing ring (14), which is installed on the top of the hollow tube (4) and is used to seal the hollow tube (4) and the blow molded part.

10. A device for trimming the edges and corners of a blow-molded competition model according to claim 4, characterized in that, It also includes a second spring (15), which is connected between the bottom of the movable rod (902) and the hollow tube (4). The second spring (15) is used to drive the movable rod (902) to reset.

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