Plastic cabinet plate injection molding edge trimmer and edge trimming method

Abstract

The invention provides a plastic cabinet plate injection molding edge trimmer and an edge trimming method, and belongs to the field of injection molding part production equipment, and the plastic cabinet plate injection molding edge trimmer comprises a driving base, a mounting shaft and a polishing roller. An electromagnet is fixed to the position, close to the polishing hole, of the inner side of the operation table, a movable support is arranged on the magnetic attraction face of the electromagnet, and the installation shaft is connected to the movable support through the tension sensor. By arranging the movable support capable of horizontally swinging, the electromagnet and the tension sensor, the tension sensor can detect lateral thrust borne by the grinding roller in real time, when the tension sensor detects that the thrust is larger than a preset value F, the controller controls the electromagnet to be powered off, at the moment, the movable support can swing towards one side, and the corresponding grinding roller also swings towards the same side; the acting force between the grinding roller and the injection molding plate is weakened, and the injection molding plate is prevented from being excessively ground.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding production equipment, and specifically refers to a plastic cabinet plate injection molding trimming machine and a trimming method. Background Art

[0002] A plastic cabinet is a cabinet body made of plastic as raw material. First, an injection molding machine and an injection mold are used to produce plastic sheets of corresponding specifications, and then the plastic sheets are assembled to make a plastic cabinet body. Since it is assembled and produced using injection-molded plastic sheets, its production cycle is short and the production speed is fast.

[0003] However, during the plastic sheet injection molding process, the sheet often has flash and burrs due to the influence of factors such as the injection pressure of the injection molding machine, the mold tightness, the mold exhaust design, and the viscosity of the raw materials. At present, when scraping off the flash and burrs of the sheet with a scraper or trimmer, there is always a problem: due to the material properties of the plastic itself (which has a certain brittleness), the sheet is often excessively removed, resulting in unqualified sheets. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a plastic cabinet panel injection molding trimming machine and a trimming method, which at least partially solve the above problems.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a plastic cabinet plate injection molding trimming machine, comprising: A driving base, wherein a driving component is arranged inside the driving base, an operating table is arranged on the top of the driving base, and a grinding hole is opened on the operating table; A mounting shaft, arranged below the grinding hole and arranged to be driven to rotate by the driving component; A grinding roller, coaxially fixed to the top end of the mounting shaft and extending from the grinding hole to above the top surface of the operating table; Wherein, an electromagnet is fixed at a position near the grinding hole on the inner side of the operating table, and a movable bracket is provided on the magnetic attraction surface of the electromagnet, and the movable bracket is configured to be able to swing elastically in the horizontal direction, and the electromagnet is configured so that when the electromagnet is energized to generate magnetic attraction, the swing of the movable bracket in the horizontal direction is locked; The output end of the driving component is provided with a flexible shaft, and the driving component drives the installation shaft to rotate through the flexible shaft; A bearing seat is connected to the mounting shaft, a tension sensor is provided on the movable bracket, the bearing seat is connected to the detection end of the tension sensor, the mounting shaft is connected to the movable bracket through the tension sensor, and the tension sensor can detect the thrust applied to the grinding roller in real time.

[0006] Furthermore, the movable bracket includes a first spring and an elastic guide rail, the bottom end of the elastic guide rail is connected to the top end of the first spring, the elastic guide rail is supported by the first spring, the elastic guide rail can swing elastically, and the elastic guide rail can be fixed by magnetic attraction of the electromagnet.

[0007] Furthermore, a sliding block capable of sliding in a vertical direction and being elastically supported is provided on the elastic guide rail, and the tension sensor is connected to the sliding block, so that the grinding roller can slide in a vertical direction.

[0008] Furthermore, the elastic guide rail includes a mounting plate, a slide rod and a second spring, the slide rod is fixed to the inner side of the mounting plate in a vertical direction, the second spring is sleeved on the slide rod, and the slider slides on the slide rod and is elastically supported by the second spring.

[0009] Furthermore, the compressible stroke of the second spring is greater than the length of the grinding roller.

[0010] Furthermore, the length of the magnetic attraction surface of the electromagnet is greater than the length of the mounting plate.

[0011] Furthermore, the grinding hole is configured as a semicircular structure, and the grinding roller is located in the grinding hole and close to a middle position on one side of a straight end surface of an inner wall of the grinding hole.

[0012] Furthermore, the tension detection direction of the tension sensor is arranged perpendicular to the straight end surface of the inner wall of the polished hole.

[0013] Furthermore, an anti-wear block is fixed to the top of the grinding roller, and the anti-wear block is configured as a hemispherical structure with a smooth surface.

[0014] A second aspect of the present invention provides a method for injection molding and trimming of plastic cabinet panels, using the above-mentioned injection molding and trimming machine for plastic cabinet panels, comprising the following steps: Step S1, the electromagnet is powered on, the external power supply is turned on, and the device is turned on. The electromagnet is powered on to generate magnetic attraction, which magnetically attracts the movable bracket, so that the horizontal swing of the movable bracket is locked, thereby fixing the horizontal movement of the grinding roller; Step S2, equipment inspection, manually push the grinding roller gently to observe whether the grinding roller is firmly fixed, then push the grinding roller with force in the lateral direction of the straight end surface of the grinding hole, and make the pushing force F1 greater than the preset value F, observe whether the electromagnet can be powered off normally, if it can be powered off normally, the equipment is normal, if it is not powered off normally, the equipment is abnormal and needs to be repaired, complete the equipment inspection, then re-magnetize the movable bracket on the electromagnet, and manually push the grinding roller gently to observe whether the grinding roller is firmly fixed; Step S3, the driving component is started, the driving component in the driving base is powered on, the driving component drives the bearing seat and the grinding roller to rotate at high speed through the flexible shaft, and makes the grinding roller idle for a certain period of time until the rotation speed of the grinding roller is stable; Step S4, trimming and grinding, placing the injection molded plate on the operating table, and approaching the grinding roller from the direction of the straight end surface of the inner wall of the grinding hole, and grinding the flash, burrs, etc. on the injection molded plate by the high-speed rotating grinding roller; Step S5, thrust detection. In step S4, when the injection molded sheet is pushed toward the grinding roller, the grinding roller is subjected to a lateral force, and finally acts on the detection end of the tension sensor. When the tension sensor detects that the lateral thrust F2 exerted on the grinding roller is greater than the preset value F, the electromagnet is powered off. At this time, the grinding roller can swing to one side under the action of the thrust to prevent the injection molded sheet from being excessively ground.

[0015] The beneficial effects achieved by the present invention using the above structure are as follows: 1. By setting a movable bracket and an electromagnet that can swing horizontally, and the mounting shaft is connected to the movable bracket through a tension sensor, the tension sensor can detect the lateral thrust exerted on the grinding roller in real time. When the tension sensor detects that the thrust is greater than the preset value F, the controller controls the electromagnet to cut off the power. At this time, the movable bracket can swing to one side, and the corresponding grinding roller also swings to the same side, thereby reducing the force between the grinding roller and the injection molded sheet and avoiding excessive grinding of the injection molded sheet. When the external force is removed, the electromagnet is energized, the movable bracket can be elastically restored, so that the grinding roller is in a vertical state, and the movable bracket is magnetically locked and fixed by the energized electromagnet again.

[0016] 2. A slider that can slide in the vertical direction and is elastically supported is arranged on the elastic guide rail, and the tension sensor is connected to the slider. The grinding roller can slide in the vertical direction. When it is necessary to grind and trim the inside of a plate with an inner cavity, if the height of the inner cavity is smaller than the height of the grinding roller, the grinding roller can be pressed downward. The grinding roller can be pushed downward so that the bottom surface of the plate is placed on the operating table, thereby improving the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A partially cutaway structural schematic diagram of a plastic cabinet panel injection molding trimming machine proposed in an embodiment of the present invention; Figure 2 A schematic diagram of a state in which a grinding roller in a plastic cabinet plate injection molding trimming machine is vertically locked, as proposed in an embodiment of the present invention; Figure 3 A schematic diagram of a state in which a grinding roller in a plastic cabinet plate injection molding trimming machine proposed in an embodiment of the present invention is pushed to one side; Figure 4A block diagram of signal connections among an electromagnet, a tension sensor and a controller in a plastic cabinet panel injection molding and trimming machine proposed in an embodiment of the present invention.

[0018] Among them, 100, controller; 1, driving base; 11, operating table; 12, flexible shaft; 101, grinding hole; 2, mounting shaft; 21, bearing seat; 3, grinding roller; 31, anti-wear block; 4, electromagnet; 41, bottom plate; 5, first spring; 6, tension sensor; 7, mounting plate; 8, slide rod; 81, slider; 9, second spring.

[0019] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0022] like Figure 1-Figure 4 As shown, the present invention proposes a plastic cabinet panel injection molding trimming machine, which includes a driving base 1, an operating table 11, a mounting shaft 2 and a grinding roller 3.

[0023] A driving component is arranged inside the driving base 1 , an operating table 11 is arranged on the top of the driving base 1 , and a grinding hole 101 is opened on the operating table 11 .

[0024] In a specific embodiment, the driving component includes a motor, a transmission box and an electronic controller. The input end of the transmission box is connected to the output end of the motor. The electronic controller is electrically connected to the motor. The motor is controlled to start / stop and adjust the motor speed through the electronic controller.

[0025] Furthermore, the mounting shaft 2 is arranged below the grinding hole 101, and the grinding roller 3 is coaxially fixed on the top of the mounting shaft 2, and extends from the grinding hole 101 to above the top surface of the operating table 11. The grinding roller 3 can be driven to rotate at high speed through the driving component. The injection molded plate is placed on the operating table 11, and the personnel manually controls the moving direction of the injection molded plate, and grinds the flash and burrs of the injection molded plate through the grinding roller 3.

[0026] However, when using a trimming machine to scrape off the flash and burrs of the plate, a problem arises. That is, due to the influence of the operator's operating skills, the plate is often over-grinded, resulting in unqualified plates, which increases the scrap rate of injection molded plate production.

[0027] Combination Figure 2 and Figure 3 As shown, an electromagnet 4 is fixed at a position near the grinding hole 101 on the inner side of the operating table 11, and a movable bracket is provided on the magnetic attraction surface of the electromagnet 4. The movable bracket is set to be able to swing elastically in the horizontal direction. When the electromagnet 4 is energized to generate magnetic attraction, the swing of the movable bracket in the horizontal direction is locked. A bearing seat 21 is connected to the mounting shaft 2, and a tension sensor 6 is provided on the movable bracket. The bearing seat 21 is connected to the detection end of the tension sensor 6. The mounting shaft 2 is connected to the movable bracket through the tension sensor 6, and the tension sensor 6 is enabled to detect the thrust exerted on the grinding roller 3 in real time. Since the mounting shaft 2 is connected to the movable bracket through the tension sensor 6, the relative positions of the mounting shaft 2 and the movable bracket are fixed. When the horizontal swing of the movable bracket is locked and fixed, the mounting shaft 2 is locked and fixed synchronously. When the movable bracket swings horizontally, the mounting shaft 2 can swing synchronously with the movable bracket.

[0028] Furthermore, a flexible shaft 12 is provided at the output end of the driving component, and the driving component drives the installation shaft 2 to rotate via the flexible shaft 12. Since the installation shaft 2 is driven via the flexible shaft 12, the installation shaft 2 can also be driven when swinging.

[0029] Furthermore, the present invention is also provided with a controller 100, and the electromagnet 4 and the tension sensor 6 are controlled by the controller 100. The control logic of the controller 100 is: when the external force detected by the tension sensor 6 is less than the preset value F, the electromagnet 4 is controlled to be energized; when the external force detected by the tension sensor 6 is greater than the preset value F, the electromagnet 4 is controlled to be de-energized.

[0030] In this way, when grinding and trimming, the injection molded sheet is always kept close to the grinding roller 3 along the detection direction of the tension sensor 6 for grinding. The force of the personnel pushing the injection molded sheet acts on the grinding roller 3, and is fed back to the tension sensor 6 by the grinding roller 3 and detected by the tension sensor 6 in real time. When the tension sensor 6 detects that the force is greater than the preset value F, the controller 100 controls the electromagnet 4 to cut off the power. At this time, the movable bracket is not locked. Under the thrust of the personnel, the movable bracket can swing to one side, and the corresponding grinding roller 3 also swings to the same side, thereby reducing the force between the grinding roller 3 and the injection molded sheet, and avoiding excessive grinding of the injection molded sheet. When the external force is removed, the force detected by the tension sensor 6 is less than the preset value F, the controller 100 controls the electromagnet 4 to be energized, the movable bracket can be elastically restored, so that the grinding roller 3 is in a vertical state, and the movable bracket is magnetically locked and fixed by the energized electromagnet 4 again.

[0031] In a specific embodiment, the movable bracket includes a first spring 5 and an elastic guide rail. The bottom end of the elastic guide rail is connected to the top end of the first spring 5. The elastic guide rail is supported by the first spring 5 so that the elastic guide rail can swing elastically. The elastic guide rail can be fixed by magnetic attraction of the electromagnet 4. Preferably, the first spring 5 is a coil spring, which has good lateral elastic supporting ability. When one end of the spring is fixed, the other end can swing elastically to a certain extent under the action of external force.

[0032] Furthermore, a bottom plate 41 is fixed to the bottom of the electromagnet 4 , and a bottom of the first spring 5 is fixed to the bottom plate 41 .

[0033] In an optional embodiment, the tension sensor 6 is connected to a display, and the display can display the force detected by the tension sensor 6 in real time, so as to facilitate the operator to observe and adjust the grinding thrust of the injection molded plate in time.

[0034] Combination Figure 2 and Figure 3 As shown, a slider 81 which can slide in the vertical direction and is elastically supported is provided on the elastic guide rail, and the tension sensor 6 is connected to the slider 81, so that the grinding roller 3 can slide in the vertical direction. When it is necessary to grind and trim the inside of a plate with an inner cavity, if the height of the inner cavity is less than the height of the grinding roller 3, the grinding roller 3 can be pressed downward, and the grinding roller 3 can be pushed downward so that the bottom surface of the plate is placed on the operating table 11, thereby improving the applicability of the device.

[0035] In a preferred embodiment, an anti-wear block 31 is fixed to the top of the grinding roller 3. The anti-wear block 31 is set to a hemispherical structure with a smooth surface, which reduces the contact area between the top of the grinding roller 3 and the top of the inner cavity of the plate, thereby avoiding unnecessary wear of the grinding roller 3 on the top of the inner cavity of the plate. The anti-wear block 31 is preferably made of polytetrafluoroethylene, which has an extremely low friction coefficient. When it contacts and rubs with the inner cavity of the plate, the friction force is small, which can reduce wear.

[0036] In a specific embodiment, the elastic guide rail includes a mounting plate 7, a slide rod 8 and a second spring 9. The slide rod 8 is fixed on the inner side of the mounting plate 7 in the vertical direction. The second spring 9 is sleeved on the slide rod 8. The slider 81 slides on the slide rod 8 and is elastically supported by the second spring 9. Under the action of the second spring 9, the slider 81 can be lifted upward, so that the grinding roller 3 pushed downward can be extended upward and reset after the external force is removed.

[0037] Furthermore, the length of the magnetic attraction surface of the electromagnet 4 is greater than the length of the mounting plate 7, so that the area of ​​the mounting plate 7 attracted by the electromagnet 4 is larger, thereby improving the stability during magnetic attraction.

[0038] In an optional embodiment, the compressible stroke of the second spring 9 is greater than the length of the grinding roller 3, thereby increasing the stroke of the grinding roller 3 that can be pressed downward and increasing the applicability of the device.

[0039] Combination Figure 1 As shown, the grinding hole 101 is set as a semicircular structure, and the grinding roller 3 is located in the grinding hole 101 and close to the middle position of one side of the straight end surface of the inner wall of the grinding hole 101. The grinding roller 3 is placed on one side of the grinding hole 101 so that the other side of the grinding roller 3 has a larger movable space.

[0040] Furthermore, the tension detection direction of the tension sensor 6 is arranged perpendicular to the straight end face of the inner wall of the grinding hole 101. When grinding and trimming, the injection molded sheet is always kept grinding close to the grinding roller 3 along the detection direction of the tension sensor 6. When the thrust is large, the grinding roller 3 can swing to one side of a larger space, so that the grinding roller 3 has a larger range of movement.

[0041] [A method for trimming plastic cabinet panels by injection molding] A second aspect of the present invention provides a method for trimming plastic cabinet panels by injection molding, comprising the following steps: Step S1, the electromagnet is powered on, the external power supply is turned on, and the device is turned on. The electromagnet 4 is powered on to generate a magnetic attraction force, which magnetically attracts the movable bracket, so that the horizontal swing of the movable bracket is locked, thereby fixing the horizontal movement of the grinding roller 3; Step S2, equipment inspection, manually push the grinding roller 3 lightly to observe whether the grinding roller 3 is firmly fixed, then push the grinding roller 3 laterally in the direction of the straight end surface of the grinding hole 101, and make the pushing force F1 greater than the preset value F, observe whether the electromagnet 4 can be powered off normally, complete the equipment inspection, then re-magnetize the movable bracket on the electromagnet 4, and manually push the grinding roller 3 lightly to observe whether the grinding roller 3 is firmly fixed; Step S3, the driving component is started, the driving component in the driving base 1 is powered on, the driving component drives the bearing seat 21 and the grinding roller 3 to run at high speed through the flexible shaft 12, and the grinding roller 3 is allowed to idle for a certain period of time until the speed of the grinding roller 3 is stable; Step S4, trimming and grinding, placing the molded plate on the operating table 11, and approaching the grinding roller 3 from the direction of the straight end surface of the inner wall of the grinding hole 101, and the high-speed rotating grinding roller 3 grinds the flash, burrs, etc. on the injection molded plate; Step S5, thrust detection. In step S4, when the injection molded sheet is pushed toward the grinding roller 3, the grinding roller 3 is subjected to a lateral force, and finally acts on the detection end of the tension sensor 6. When the tension sensor 6 detects that the lateral thrust F2 exerted on the grinding roller 3 is greater than the preset value F, the electromagnet 4 is powered off. At this time, the grinding roller 3 can swing to one side under the action of the thrust, thereby preventing the injection molded sheet from being excessively ground.

[0042] In step S4, the injection molded plate is always kept polished close to the polishing roller 3 along the detection direction of the tension sensor 6, so that the tension sensor 6 can accurately detect the force exerted on the polishing roller 3, thereby reducing the detection error.

[0043] Furthermore, in step S2, when the grinding roller 3 is pushed manually for detection, it is possible to observe whether the manually applied thrust is greater than a preset value F according to a display externally connected to the tension sensor 6.

[0044] In summary of the above embodiments: by providing a movable bracket and an electromagnet 4 capable of swinging horizontally, and the mounting shaft 2 is connected to the movable bracket through a tension sensor 6, the tension sensor 6 can detect the lateral thrust exerted on the grinding roller 3 in real time. When the tension sensor 6 detects that the force is greater than a preset value F, the controller 100 controls the electromagnet 4 to cut off the power. At this time, the movable bracket can swing to one side, and the corresponding grinding roller 3 also swings to the same side, thereby reducing the force between the grinding roller 3 and the injection molded sheet, and preventing the injection molded sheet from being excessively ground. When the external force is removed, the electromagnet 4 is energized, the movable bracket can be elastically restored, so that the grinding roller 3 is in a vertical state, and the movable bracket is magnetically locked and fixed by the energized electromagnet 4 again. By arranging a slider 81 that can slide in the vertical direction and is elastically supported on the elastic guide rail, the tension sensor 6 is connected to the slider 81, so that the grinding roller 3 can slide in the vertical direction. When it is necessary to grind and trim the inside of a plate with an inner cavity, if the height of the inner cavity is smaller than the height of the grinding roller 3, the grinding roller 3 can be pressed downward. The grinding roller 3 can be pushed downward so that the bottom surface of the plate is placed on the operating table 11, thereby improving the applicability of the device.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0047] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A plastic cabinet panel injection molding trimming machine, characterized in that: include: A driving base (1), wherein a driving component is provided inside the driving base (1), an operating table (11) is provided on the top of the driving base (1), and a grinding hole (101) is provided on the operating table (11); A mounting shaft (2) disposed below the grinding hole (101) and configured to be driven to rotate by the driving component; A grinding roller (3) is coaxially fixed to the top end of the mounting shaft (2) and extends from the grinding hole (101) to above the top surface of the operating table (11); An electromagnet (4) is fixed at a position on the inner side of the operating table (11) near the grinding hole (101); a movable bracket is provided on the magnetic attraction surface of the electromagnet (4); the movable bracket is arranged to be able to swing elastically in the horizontal direction; and the movable bracket is arranged so that when the electromagnet (4) is energized to generate a magnetic attraction force, the swing of the movable bracket in the horizontal direction is locked; The output end of the driving component is provided with a flexible shaft (12), and the driving component drives the installation shaft (2) to rotate via the flexible shaft (12), so that the installation shaft (2) can be driven when swinging; A bearing seat (21) is connected to the mounting shaft (2), a tension sensor (6) is provided on the movable bracket, the bearing seat (21) is connected to a detection end of the tension sensor (6), the mounting shaft (2) is connected to the movable bracket via the tension sensor (6), and the tension sensor (6) is used to detect the thrust applied to the grinding roller (3) in real time.

2. The plastic cabinet board injection molding trimming machine according to claim 1, characterized in that: The movable bracket comprises a first spring (5) and an elastic guide rail, wherein the bottom end of the elastic guide rail is connected to the top end of the first spring (5), and the elastic guide rail is supported by the first spring (5) so that the elastic guide rail can swing elastically, and the elastic guide rail can be fixed by magnetic attraction of the electromagnet (4).

3. The plastic cabinet board injection molding trimming machine according to claim 2, characterized in that: The elastic guide rail is provided with a sliding block (81) which is capable of sliding in a vertical direction and is elastically supported, and the tension sensor (6) is connected to the sliding block (81), so that the grinding roller (3) can slide in a vertical direction.

4. The plastic cabinet board injection molding trimming machine according to claim 3, characterized in that: The elastic guide rail comprises a mounting plate (7), a sliding rod (8) and a second spring (9); the sliding rod (8) is fixed to the inner side of the mounting plate (7) in a vertical direction; the second spring (9) is sleeved on the sliding rod (8); and the sliding block (81) slides on the sliding rod (8) and is elastically supported by the second spring (9).

5. The plastic cabinet board injection molding trimming machine according to claim 4, characterized in that: The compressible stroke of the second spring (9) is greater than the length of the grinding roller (3).

6. The plastic cabinet board injection molding trimming machine according to claim 4, characterized in that: The length of the magnetic attraction surface of the electromagnet (4) is greater than the length of the mounting plate (7).

7. The plastic cabinet board injection molding trimming machine according to claim 1, characterized in that: The grinding hole (101) is configured as a semicircular structure, and the grinding roller (3) is located in the grinding hole (101) and close to a middle position on one side of a straight end surface of an inner wall of the grinding hole (101).

8. The plastic cabinet board injection molding trimming machine according to claim 7, characterized in that: The tension detection direction of the tension sensor (6) is arranged perpendicular to the straight end surface of the inner wall of the polished hole (101).

9. The plastic cabinet board injection molding trimming machine according to claim 1, characterized in that: An anti-wear block (31) is fixed to the top end of the grinding roller (3), and the anti-wear block (31) is configured as a hemispherical structure with a smooth surface.

10. A method for trimming plastic cabinet panels by injection molding, using the plastic cabinet panel trimming machine as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step S1, the electromagnet is powered on, the external power supply is turned on, and the device is turned on, the electromagnet (4) is powered on to generate a magnetic attraction force, which magnetically attracts the movable bracket, so that the horizontal swing of the movable bracket is locked, thereby fixing the horizontal movement of the grinding roller (3); Step S2, equipment inspection, manually push the grinding roller (3) slightly to observe whether the grinding roller (3) is firmly fixed, then push the grinding roller (3) with force in the lateral direction of the straight end surface of the grinding hole (101), and make the pushing force F1 greater than the preset value F, observe whether the electromagnet (4) can be powered off normally, complete the equipment inspection, then re-magnetize the movable bracket onto the electromagnet (4), and manually push the grinding roller (3) slightly to observe whether the grinding roller (3) is firmly fixed; Step S3, the driving component is started, the driving component in the driving base (1) is powered on, the driving component drives the bearing seat (21) and the grinding roller (3) to rotate at high speed through the flexible shaft (12), and makes the grinding roller (3) idle for a certain period of time until the rotation speed of the grinding roller (3) is stable; Step S4, trimming and grinding, placing the injection molded plate on the operating table (11), and approaching the grinding roller (3) from the direction of the straight end surface of the inner wall of the grinding hole (101), and grinding the flash, burrs, etc. on the injection molded plate by the high-speed rotating grinding roller (3); Step S5, thrust detection. In step S4, when the injection molded sheet is pushed toward the grinding roller (3), the grinding roller (3) is subjected to a lateral force, which ultimately acts on the detection end of the tension sensor (6). When the tension sensor (6) detects that the lateral thrust F2 exerted on the grinding roller (3) is greater than a preset value F, the electromagnet (4) is powered off. At this time, the grinding roller (3) can swing to one side under the action of the thrust, thereby preventing the injection molded sheet from being over-grinded.

Images