A polishing device for deburring of an automobile injection molded part

Abstract

The present application relates to the technical field of polishing, in particular to a polishing equipment for deburring of automobile injection molding parts, comprising a moving frame, a clamping assembly, a guide unit and a switching unit. In the present application, the switching unit is adapted to the case of arc surface, the left clamping assembly drives the injection molding part to reciprocatingly rotate with the axis of the arc surface as the rotation axis, so as to reciprocatingly polish along the profile of the arc surface, while in the case of flat surface, the two clamping assemblies drive the injection molding part to move up and down, and reciprocatingly polish the flat surface in cross, so as to avoid the problem of new edge caused by one-way polishing, and ensure the smoothness of the surface to be polished. The guide unit forms a stable triangular support, improves the stability of the process of moving the injection molding part close to the abrasive belt and the polishing process, and then strictly controls the distance between the surface to be polished and the abrasive belt through the fixed distance sleeve, avoids the problem of over-polishing caused by the continuous right movement of the moving frame, and improves the accuracy during polishing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polishing, in particular to a polishing device for deburring of automobile injection molded parts. BACKGROUND

[0002] The automobile injection molded part refers to a plastic part manufactured by an injection molding process, such as a plastic component used in automobile trim panel and air vent, etc. The injection molding process is widely used in various parts of modern automobiles due to its flexible design, high production efficiency, cost-effectiveness, and lightweight advantages.

[0003] The injection molding process is a process of closing two or more molds to form a mold cavity, then injecting molten plastic into the mold cavity, and forming the required injection molded part after cooling and fixing. However, during the injection process, a small amount of molten plastic will inevitably flow into the tiny gap, thus forming fine raised lines on the surface of the injection molded part after cooling, which are also called parting lines. The burrs will weaken the visual presence, affect the aesthetic and tactile feel, and affect the subsequent spraying and coating processes, so the burrs need to be polished and removed.

[0004] Currently, a mechanical arm is used to grip the injection molded part or a person manually holds the injection molded part, and the surface to be polished of the injection molded part is moved in the same direction. During the movement, the corresponding end surface is in contact with the existing polishing device (such as a sanding machine) for polishing. The current polishing process has the following problems: the current one-way movement polishing leaves a new edge at the edge and a one-way continuous grinding mark, which makes it difficult to meet the requirements of smoothness and aesthetics. In addition, the movement distance of the injection molded part is not strictly controlled during the movement polishing process, which may cause the injection molded part to be scrapped due to over-polishing.

[0005] Secondly, the above process can be achieved by directional movement of the injection molded part for flat surface polishing needs, but part of the surface to be polished of the automobile injection molded part is an arc surface. It is difficult to accurately polish the arc surface by manually holding or moving the injection molded part with a mechanical arm, which may cause over-polishing. SUMMARY

[0006] Therefore, it is necessary to provide a polishing device for deburring of automobile injection molded parts to solve the above problems of the prior art.

[0007] The present application provides a polishing device for deburring of automobile injection molded parts, which comprises a moving frame.

[0008] A sanding machine is arranged on the right side of the moving frame and comprises a sand belt and a plurality of rotating shafts for driving the sand belt to polish.

[0009] The polishing mechanism is arranged between the moving frame and the leftmost rotating shaft, and includes two left and right clamping assemblies for clamping the injection molded part. Each clamping assembly includes two front and rear mounting frames. The opposite surfaces of the two mounting frames in the same clamping assembly are slidably provided with two upper and lower clamping blocks.

[0010] The guide unit is arranged between the moving frame and the leftmost rotating shaft, and is used for guiding the moving frame to stably approach the sand belt and controlling the distance between the injection molded part and the sand belt to prevent over-polishing.

[0011] The switching unit is arranged on the moving frame and includes a movable sleeve and a matching column. The movable sleeve is arranged on the front and rear sides of the two vertical sections of the moving frame.

[0012] The switching unit is configured to switch the polishing mode by matching the matching column with different movable sleeves. When the matching column matches with the movable sleeve away from the injection molded part, the right clamping assembly is driven to reciprocally swing along the arc surface contour for cross polishing. When the matching column matches with the movable sleeve close to the injection molded part, the two clamping assemblies are driven to synchronously move up and down for reciprocally cross polishing the flat surface.

[0013] According to an advantageous embodiment, the two vertical sections of the moving frame are slidably provided with sliding blocks. The sliding blocks are movably provided with horizontal rods extending forward and backward along the axis. The two mounting frames in the right clamping assembly are arranged on the opposite surfaces of the two horizontal rods.

[0014] The clamping assembly further includes sliding blocks. The opposite surfaces of the two front and rear mounting frames are slidably provided with sliding blocks. The clamping blocks are fixedly arranged on the corresponding sliding blocks. The mounting frames are rotatably provided with bidirectional threaded rods vertically along the axis. The bidirectional threaded rods penetrate through the corresponding two sliding blocks and are threadedly matched with the sliding blocks.

[0015] According to an advantageous embodiment, when the arc surface is polished, the axis of the arc surface of the injection molded part is collinear with the axis of the horizontal rod after the clamping blocks are attached to the injection molded part.

[0016] According to an advantageous embodiment, the guide unit includes a guide column. The right end surface of the moving frame is fixedly provided with a guide column extending from left to right along the axis. The sand belt machine is fixedly provided with a butt joint plate. The butt joint plate is provided with a butt joint groove.

[0017] According to an advantageous embodiment, the front and rear sides of the left rotating shaft are rotatably provided with guide blocks. The guide blocks are provided with two upper and lower guide grooves penetrating through the guide blocks from left to right. The right end surface of the vertical section of the moving frame is fixedly provided with two upper and lower insertion columns horizontally along the axis.

[0018] According to an advantageous embodiment, the guide unit further comprises a distance control group arranged on all the plug-in columns, the distance control group comprising mounting grooves, the plug-in columns being provided with the mounting grooves penetrating therefrom in the up-down direction, and the plug-in columns being provided with distance sleeves slidingly sleeved thereon in the left-right direction.

[0019] The left end surface of the distance sleeve is fixedly provided with an arc-shaped block, and the up-down two adjacent arc-shaped blocks are symmetrically arranged in the up-down direction and correspond to the two guide columns located between the two arc-shaped blocks. The up-down two arc-shaped blocks are locked by bolts.

[0020] According to an advantageous embodiment, the movable sleeve is sleeved on the corresponding horizontal rod and is arranged on the front and back sides of the two movable sleeves, respectively. The left end surface of the movable sleeve is provided with a matching groove, and the opposite surfaces of the two mounting frames are fixedly provided with mounting plates.

[0021] The mounting plate is movably penetrated by an axis extending in the left-right direction, and the movable sleeve away from the mounting frame is rotatably arranged on the corresponding sliding block. The right end surface of the butt joint column is fixedly provided with a waist-shaped block, and the matching column is fixedly arranged on the right end surface of the waist-shaped block.

[0022] According to an advantageous embodiment, the left end surface of the sliding block is provided with a locking groove, and the left end surface of the vertical section of the moving frame is provided with a locking pin sliding in the left-right direction. The locking pin and the moving frame are jointly provided with a return spring, and the right end surface of the waist-shaped block is fixedly provided with a pressing member for pressing the locking pin.

[0023] The axis of the locking pin is located at the middle position of the axes of the adjacent two plug-in columns.

[0024] The matching column is inserted into the matching groove of the movable sleeve away from the mounting frame, and the polishing operation process of the matching arc-shaped surface burr is adapted.

[0025] According to an advantageous embodiment, the movable sleeve close to the mounting frame is fixedly connected with the corresponding sliding block.

[0026] The matching column is inserted into the matching groove on the movable sleeve close to the mounting frame, the locking pin is located outside the locking groove, and the sliding block drives the two clamping assemblies to move up and down through the cooperation between the front and back two matching columns and the matching grooves. The polishing operation process of the matching flat surface burr is adapted.

[0027] In summary, the present application includes at least one of the following beneficial effects: firstly, in the present application, the switching unit is adapted to the arc surface, the left clamping assembly drives the injection molding part to rotate around the axis of the arc surface as the rotating axis, so as to reciprocatingly polish along the profile of the arc surface, and in the case of adapting to the flat surface, the two clamping assemblies drive the injection molding part to move up and down, and reciprocatingly polish the flat surface, and crosswise and intermittently polish the burr in different directions, so as to avoid the problem of over-polishing or new edge caused by one-way polishing, and ensure the smoothness and aesthetics of the polished surface. Secondly, crosswise and intermittent polishing of the burr prevents local overheating from melting the plastic and affecting the polishing effect of the injection molding part.

[0028] Secondly, in the present application, the guide unit forms a stable triangular support, which improves the stability of the injection molding part during the process of moving close to the abrasive belt and the polishing process, and the distance sleeve strictly controls the distance between the surface to be polished and the abrasive belt, avoiding the problem of over-polishing caused by continuous right movement of the moving frame, and improving the accuracy during polishing. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 A perspective structural schematic view of a deburring and polishing device for automobile injection molding parts is shown.

[0031] Figure 2 A front view of the moving frame, the mounting frame and the plug-in column is shown.

[0032] Figure 3 A partial exploded perspective structural schematic view of the mounting frame, the clamping block and the sliding block is shown.

[0033] Figure 4 A perspective structural schematic view of the moving frame, the rotating shaft and the movable sleeve is shown.

[0034] Figure 5 A perspective structural schematic view of the moving frame, the rotating shaft and the movable sleeve is shown. Figure 4 An enlarged view of A in the above figure.

[0035] Figure 6 A partial perspective structural schematic view of the moving frame, the horizontal rod and the butt joint column is shown.

[0036] Figure 7 An enlarged view of the state switching change in the B part is shown. Figure 6 An enlarged view of the state switching change in the B part is shown.

[0037] Figure 8 An enlarged view of the state switching change in the B part is shown.

[0038] Figure 9 An enlarged view of the state switching change in the B part is shown. Figure 8 An enlarged view of the state switching change in the B part is shown.

[0039] Wherein, the above drawings include the following reference signs: 1, a moving frame; 2, a belt sander; 20, a rotating shaft; 3, a polishing mechanism; 30, a clamping assembly; 300, a mounting frame; 301, a clamping block; 302, a sliding block; 303, a bidirectional threaded rod; 31, a guide unit; 310, a guide column; 311, an abutting plate; 312, a guide block; 313, a guide groove; 314, a plug-in column; 315, a distance control group; 3150, a mounting groove; 3151, a distance fixing sleeve; 3152, an arc-shaped block; 32, a switching unit; 320, a movable sleeve; 321, a matching groove; 322, a mounting plate; 323, an abutting column; 324, a waist-shaped block; 325, a matching column; 326, a locking groove; 327, a locking pin; 328, a return spring; 329, a pressing piece; 33, a sliding block; 330, a horizontal rod. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objectives, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0041] As shown in Figure 1 A polishing device for deburring of automobile injection molded parts is used in cooperation with an external mechanical hand, comprising: a moving frame 1, the moving frame 1 is U-shaped and the opening faces downward, the moving frame 1 is moved by the external mechanical hand, a belt sander 2 is arranged at the right side of the moving frame 1, the belt sander 2 comprises a sand belt and a plurality of rotating shafts 20 for supporting and driving the sand belt to polish, and a polishing mechanism 3 is arranged between the leftmost rotating shaft 20 and the moving frame 1.

[0042] As shown in Figure 1 , Figure 2 and Figure 3As shown, the polishing mechanism 3 comprises a clamping assembly 30, two clamping assemblies 30 are arranged between the two vertical sections of the moving frame 1, the clamping assembly 30 comprises two front and rear arranged mounting frames 300, and the opposite surfaces of the two mounting frames 300 in the same clamping assembly 30 are slidably provided with two upper and lower arranged clamping blocks 301.

[0043] The injection molded part is clamped by the clamping blocks 301 in the two clamping assemblies 30, and the right clamping assembly 30 is adjusted before polishing the arc surface, so that the right clamping assembly 30 is opposite to the axis of the arc surface.

[0044] As shown in Figure 1 and Figure 2 , the moving frame 1 and the leftmost rotating shaft 20 are jointly provided with a guide unit 31 for guiding the moving frame 1 to approach the sand belt while controlling the distance between the injection molded part and the sand belt.

[0045] As shown in Figure 1 , Figure 2 and Figure 3 , the moving frame 1 is provided with a switching unit 32, which is used for the synchronous up and down movement of the two clamping assemblies 30 to adapt to the switching of the straight surface polishing and the rotation of the left clamping assembly 30 to adapt to the arc surface polishing.

[0046] When working, first, the injection molded part to be deburred and polished is clamped by the two clamping assemblies 30, and the clamping assembly 30 is installed between the moving frame 1, completing the installation and clamping of the injection molded part. During this process, it needs to be pointed out that for the arc surface polishing operation, the size of the injection molded part is known, and the distance between the arc surface and the right clamping assembly 30 needs to be adjusted during clamping operation, so that the clamping assembly 30 is opposite to the axis of the arc surface. For the flat surface polishing operation, the flat surface needs to be controlled to be parallel to the right clamping assembly 30 and the distance between them is a set value, so as to strictly control the distance between the injection molded part and the sand belt during the subsequent operation of the guide unit 31, and ensure the accuracy of polishing.

[0047] Then the external mechanical hand drives the moving frame 1, the clamping assembly 30 and the injection molded part to move right synchronously, the guide unit 31 guides the right movement of the moving frame 1, and strictly controls the distance between the injection molded part and the sand belt to be the polishing distance through the guide unit 31, to avoid excessive polishing. Then the switching unit 32 switches to the corresponding polishing condition according to the arc surface or the flat surface.

[0048] In the polishing process of the arc surface, the left clamping assembly 30 drives the injection molded part to rotate reciprocatingly with the axis of the arc surface being polished as the rotation axis, so as to reciprocatingly polish along the profile of the arc surface, that is, to crosswise and intermittently polish the burr in different directions, thereby avoiding the problems of over-polishing or new edges caused by one-way polishing, and ensuring the smoothness and aesthetics of the arc surface. In addition, the crosswise and intermittent polishing of the burr prevents local overheating from causing the plastic to melt and affecting the polishing effect of the injection molded part.

[0049] In the polishing process of the flat surface, the two clamping assemblies 30 are integrated and parallel to the moving frame 1, and the two clamping assemblies 30 drive the injection molded part to move up and down, thereby reciprocatingly and crosswise polishing the flat surface.

[0050] As shown in Figure 2 , Figure 3 and Figure 4 , the two vertical sections of the moving frame 1 are each provided with a sliding block 33 sliding up and down, the sliding block 33 is driven by an external electric push rod (not shown in the figure) to move up and down, the sliding block 33 is movably provided with a horizontal rod 330 extending in front and back, the horizontal rod 330 can slide forward and backward while also being able to rotate, and the two mounting frames 300 in the right clamping assembly 30 are respectively arranged on the opposite faces of the two horizontal rods 330.

[0051] As shown in Figure 3 , the clamping assembly 30 further comprises a sliding block 302, the opposite faces of the two mounting frames 300 are each provided with a sliding block 302 sliding up and down, and the clamping block 301 is fixedly arranged on the corresponding sliding block 302. The mounting frame 300 is movably provided with a vertical bidirectional threaded rod 303, the bidirectional threaded rod 303 penetrates through the corresponding two sliding blocks 302 and is in threaded cooperation with the sliding blocks 302, and the bidirectional threaded rod 303 is connected with an external motor (not shown in the figure).

[0052] It should be noted that the connection between the right mounting frame 300 and the corresponding horizontal rod 330 is detachable, and the connection between the left clamping assembly 30 and the moving frame 1 is plug-in installation, which is convenient for clamping fixtures for injection molded parts of different lengths.

[0053] As shown in Figure 1 , Figure 2 and Figure 3 , the clamping block 301 is provided with a pad (not shown in the figure), and when polishing the arc surface, the clamping block 301 is attached to the clamped injection molded part, and the axis of the arc surface of the injection molded part is collinear with the axis of the horizontal rod 330.

[0054] In operation, before the mounting frame 300 is inserted and mounted on the mobile frame 1, the clamping and mounting process of the injection molded part is carried out. First, according to the shape features of the upper and lower sides of the injection molded part, the corresponding pad is selected and mounted on the clamping block 301. In this way, after clamping and mounting, in the case of polishing the arc surface, the axis of the horizontal rod 330 can be collinear with the axis of the arc surface, and in the case of polishing the flat surface, the flat surface can be parallel to the right end surface of the mobile frame 1 and the right end surface of the mounting frame 300. It needs to be additionally explained that the cooperation effect between the shape features of the pad and the shape features of the injection molded part is obtained through many experiments and tests by personnel in the field, which meets the use requirements and can be reused many times.

[0055] Then the injection molded part is clamped, the injection molded part is placed between the two mounting frames 300 in the clamping assembly 30 by hand, and the front and back sides are in close contact with the mounting frames 300. Then the external motor works to drive the bidirectional threaded rod 303 to rotate synchronously. Through the thread cooperation between the bidirectional threaded rod 303 and the sliding block 302, the sliding block 302 drives the corresponding clamping block 301 to move synchronously. The two clamping blocks 301 opposite to each other move close to each other, and finally clamp the injection molded part. At this time, the clamping assembly 30 and the injection molded part become one, and then the right clamping assembly 30 and the injection molded part are mounted on the horizontal rod 330 by hand, preparing to start the subsequent burr polishing work.

[0056] As shown in Figure 1 and Figure 2 , the guide unit 31 includes a guide column 310, and the right end surface of the mobile frame 1 is fixedly provided with the guide column 310 whose axis extends from left to right. The sanding machine 2 is fixedly provided with a butt joint plate 311, and the butt joint plate 311 is provided with a butt joint groove. After the guide column 310 is inserted into the butt joint groove, the mobile frame 1 is moved left and right.

[0057] As shown in Figure 4 and Figure 5 , the front and back sides of the rotating shaft 20 on the left side are rotatably sleeved with guide blocks 312, and the two guide blocks 312 are respectively opposite to the left and right of the two vertical sections of the mobile frame 1. The guide block 312 is fixedly connected with the rack of the sanding machine 2, and the guide block 312 is provided with two upper and lower distributed guide grooves 313 which are penetrated left and right. The right end surface of the vertical section of the mobile frame 1 is fixedly provided with two upper and lower distributed plug-in columns 314 whose axes extend left and right.

[0058] The guide column 310 is inserted into the butt joint groove to guide the cooperation between the plug-in column 314 and the guide groove 313. When the plug-in column 314 is also located in the corresponding guide groove 313, through the cooperation between the guide column 310 and the butt joint groove and the cooperation between the plug-in column 314 and the guide groove 313, a triangular stable frame in the longitudinal plane is formed, which improves the stability of the mobile frame 1 during polishing.

[0059] The external mechanical arm drives the moving frame 1 and the injection molded part to move synchronously, the guide column 310 is firstly inserted into the butt joint groove, the guide subsequent plug-in column 314 is matched with the plug-in of the guide groove 313, with the continuous movement of the moving frame 1, the plug-in column 314 is inserted into the corresponding guide groove 313, at this time, the right side of the moving frame 1 is opposite to the polishing surface of the sand belt, at the same time, the upper guide column 310 is matched with the butt joint groove, the lower front and rear plug-in columns 314 are matched with the guide groove 313, and the moving frame 1 forms a stable triangular support, improves the stability of the injection molded part during the movement close to the sand belt and the polishing process, and ensures the polishing effect.

[0060] As shown in Figure 1 , Figure 4 and Figure 5 , the guide unit 31 further comprises a distance control group 315 arranged on all the plug-in columns 314, the distance control group 315 comprises a mounting groove 3150, the plug-in column 314 is penetrated by the mounting groove 3150 from top to bottom, and the plug-in column 314 is slidably sleeved with a distance limiting sleeve 3151 from left to right, the distance limiting sleeve 3151 and the guide block 312 are in contact and abutment, so that the moving frame 1 cannot continue to move to the right, thereby controlling the distance between the moving frame 1 and the left rotating shaft 20.

[0061] The left end surface of the distance limiting sleeve 3151 is fixedly provided with an arc-shaped block 3152, and the upper and lower two arc-shaped blocks 3152 are symmetrically arranged and correspond to the two guide columns 310 located between the two arc-shaped blocks 3152, and the two arc-shaped blocks 3152 are locked by bolts.

[0062] Before the polishing operation, the left and right positions of the distance limiting sleeve 3151 are adjusted according to the known size of the injection molded part, and the upper and lower corresponding two distance limiting sleeves 3151 are locked by locking the arc-shaped blocks 3152 by bolts.

[0063] During the process that the moving frame 1 drives the injection molded part to continuously move close to the sand belt, the distance limiting sleeve 3151 abuts against the guide block 312, the moving frame 1 moves to the set position and cannot continue to move to the right, at this time, the flat surface or arc surface of the injection molded part is in contact with the left polishing surface of the sand belt, by the above-mentioned mode, the problem of over-polishing caused by the continuous movement of the moving frame 1 to the right is avoided, and the accuracy during polishing is improved.

[0064] As shown in Figure 1 , Figure 6 and Figure 7As shown, the switching unit 32 includes a movable sleeve 320, and the front and rear sides of the sliding block 33 are provided with the movable sleeve 320 sleeved on the corresponding horizontal rod 330. The left end face of the movable sleeve 320 is provided with a matching groove 321, and the opposite faces of the left two mounting frames 300 are fixedly provided with mounting plates 322. The mounting plates 322 are movably penetrated by the axis left-right extending butt joint column 323, and the movable sleeve 320 away from the mounting frame 300 is rotationally arranged on the corresponding sliding block 33. The right end face of the butt joint column 323 is fixedly provided with a waist-shaped block 324, and the right end face of the waist-shaped block 324 is fixedly provided with a matching column 325.

[0065] As shown in Figure 6 and Figure 7 The left end face of the sliding block 33 is provided with a locking groove 326, and the left end face of the vertical section of the moving frame 1 is provided with a locking pin 327. The locking pin 327 and the moving frame 1 are jointly provided with a return spring 328, and the right end face of the waist-shaped block 324 is fixedly provided with a pressing member 329 for pressing the locking pin 327.

[0066] The axis of the locking pin 327 is located at the middle position of the axes of the two adjacent plug-in columns 314.

[0067] The locking pin 327 is locked by the pressing member 329, the matching column 325 is inserted into the matching groove 321 of the movable sleeve 320 away from the mounting frame 300, and the polishing operation process of the adaptive arc surface burr is completed.

[0068] When the end face of the injection molded part that needs to be polished is an arc surface, the external electric push rod works to move the sliding block 33 up and down to the position between the two plug-in columns 314. At this time, the locking groove 326 and the locking pin 327 are left-right opposite, the butt joint column 323 is rotated, the matching column 325 and the movable sleeve 320 away from the mounting frame 300 are left-right opposite, the butt joint column 323 is moved left to make the butt joint column 323 drive the matching column 325 to be clamped into the corresponding matching groove 321, and then in the above process, the butt joint column 323 drives the waist-shaped block 324 to be synchronously moved right, and the pressing member 329 presses the locking pin 327, so that the locking pin 327 is clamped into the locking groove 326, and the locking of the sliding block 33 is completed. The return spring 328 is deformed, so that the sliding block 33, the right clamping assembly 30 and the injection molded part are all locked, and the axis of the left rotating shaft 20 and the axis of the arc surface (the axis of the horizontal rod 330) are located in the same horizontal plane. At the same time, the left clamping assembly 30 can rotate around the horizontal rod 330 as the rotating axis.

[0069] After maintaining the insertion state of the locking pin 327 and the matching column 325 respectively, the abutting column 323 is reciprocatingly rotated (manual rotation or rotation through external driving member can be adopted), so that the left clamping assembly 30 drives the injection molding part to reciprocatingly rotate with the axis of the arc-shaped surface to be polished as the rotation axis. In this process, the burrs on the arc-shaped surface are polished by the abrasive belt. After polishing, the abutting column 323 is reset to left, and the locking pin 327 is reset through the elastic force generated by the deformation of the reset spring 328.

[0070] Through the reciprocating polishing operation mode of the arc-shaped surface, the problem of over-polishing or new edge caused by one-way polishing is avoided, and the smoothness of the arc-shaped surface is ensured. In addition, the cross intermittent polishing of the burrs prevents local overheating from melting the plastic and affecting the polishing effect of the injection molding part.

[0071] It should be noted that the pressing member 329 is in the shape of a circular arc, and the vertical length of the left end part of the locking pin 327 covers the vertical length of the pressing member 329. In the process of pressing the locking pin 327 into the locking slot 326 by the pressing member 329, the circular arc feature of the pressing member 329 enables the pressing action on the locking pin 327 to be maintained during the rotation of the pressing member 329 following the abutting column 323, thereby keeping the locking state of the sliding block 33.

[0072] As shown in Figure 6 and Figure 7 , the movable sleeve 320 close to the mounting frame 300 is fixedly connected with the corresponding sliding block 33.

[0073] The matching column 325 is inserted into the matching groove 321 on the movable sleeve 320 close to the mounting frame 300, and the locking pin 327 is located outside the locking slot 326. Through the cooperation between the matching column 325 and the matching groove 321, the sliding block 33 drives the two clamping assemblies 30 to move up and down, which is suitable for the polishing operation process of flat surfaces.

[0074] Referring to Figure 8 and Figure 9When the end face of the injection molded part needs to be polished to be a flat surface, the butt joint column 323 is rotated so that the matching column 325 is rotated to be opposite to the movable sleeve assembly 320 near the mounting frame 300, the butt joint column 323 is moved to the left so that the butt joint column 323 drives the matching column 325 to be clamped into the corresponding matching groove 321, but the length of the matching column 325 entering the matching groove 321 is less than the length of the matching column 325 entering the matching groove 321 in the case of polishing the arc surface, at this time, the pressing piece 329 does not contact the locking pin 327, the clamping assembly 30 on the horizontal rod 330 and the left clamping assembly 30 corresponding to the butt joint column 323 are at the same height, so that the mounting frame 300 in the two clamping assemblies 30 and the flat surface to be polished on the injection molded part are vertically oriented, and then the external electric push rod works to make the sliding block 33 move up and down, so that the injection molded part moves up and down and the flat surface is polished.

[0075] It needs to be additionally explained that in the present application, the injection molded part is guided to approach the abrasive belt through the guide unit 31, and the distance between the injection molded part and the abrasive belt is controlled through the distance control assembly 315, so as to improve the stability and polishing accuracy, the polishing mechanism 3 is adapted to reciprocating polishing of the arc surface and reciprocating polishing of the flat surface through the switching unit 32, so as to avoid the problems of over-polishing or new edges caused by one-way polishing, and to ensure the smoothness of the arc surface, and then the cross intermittent polishing of the burr prevents local overheating from causing the plastic to melt and affecting the polishing effect of the injection molded part. Although the present application increases the above-mentioned components compared with the prior art, the equipment cost is increased, but the increased components are all conventional ordinary mechanical components, which can be used for a long time after single installation, so the increased equipment cost is low, and compared with the benefits brought by the reciprocating polishing of the arc surface and the reciprocating polishing of the flat surface in the present application, the increased cost can be ignored.

[0076] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and in the absence of the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0077] In addition, the terms "first", "second", "one", "two" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or a specific number of indicated technical features. Therefore, the features defined with "first", "second", "one", "two" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0078] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "set", "connected", "mounted", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0079] The embodiments of the specific implementation are the preferred embodiments of the present application, and are not limited to the protection scope of the present application, so that any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A polishing apparatus for deburring of an automobile injection molded part, characterized by, The utility model relates to a sanding machine for injection molding parts, comprising: a mobile frame, which is U-shaped and opens downward; a sanding machine, which is arranged on the right side of the mobile frame and comprises a sanding belt and a plurality of rotating shafts for driving the sanding belt to sand; a sanding mechanism, which is arranged between the mobile frame and the leftmost rotating shaft and comprises two clamping assemblies arranged on the left and right sides, for clamping the injection molding parts, each clamping assembly comprises two mounting frames arranged on the front and back sides, and the opposite surfaces of the two mounting frames in the same clamping assembly are slidably provided with two clamping blocks arranged on the upper and lower sides; a guide unit, which is arranged between the mobile frame and the leftmost rotating shaft, for guiding the mobile frame to stably approach the sanding belt and controlling the distance between the injection molding parts and the sanding belt to prevent over-sanding; a switching unit, which is arranged on the mobile frame and comprises a movable sleeve and a matching column, and the movable sleeve is arranged on the front and back sides of the two vertical sections of the mobile frame; the switching unit is configured to switch the sanding mode by matching the matching column with different movable sleeves: when the matching column matches the movable sleeve away from the injection molding parts, the right clamping assembly is driven to reciprocally swing along the arc surface contour for cross-sanding; when the matching column matches the movable sleeve close to the injection molding parts, the two clamping assemblies are driven to synchronously move up and down for reciprocally cross-sanding the flat surface; the right end surfaces of the vertical sections of the mobile frame are fixedly provided with two insertion columns arranged on the upper and lower sides and having horizontal axes, and the guide unit further comprises a distance control group arranged on all the insertion columns, the distance control group comprises mounting grooves, the insertion columns are provided with the mounting grooves penetratingly arranged on the upper and lower sides, and the insertion columns are slidably sleeved with distance setting sleeves on the left and right sides; the left end surfaces of the distance setting sleeves are fixedly provided with arc blocks, the upper and lower adjacent arc blocks are symmetrically arranged on the upper and lower sides, and the two guide columns are located between the two arc blocks, and the two arc blocks are locked by bolts; the movable sleeves are sleeved on the corresponding horizontal rods and are slidably arranged on the front and back sides of the two movable sleeves, respectively, the left end surfaces of the movable sleeves are provided with matching grooves, and the opposite surfaces of the two mounting frames on the left side are fixedly provided with mounting plates; the mounting plates are movably penetrated with butt columns extending on the left and right sides, the movable sleeves away from the mounting frames are rotatably arranged on the corresponding sliding blocks, and the right end surfaces of the butt columns are fixedly provided with waist blocks, and the matching column is fixedly arranged on the right end surface of the waist block.

2. The polishing apparatus for deburring of an injection molded part of an automobile according to claim 1, characterized in that: the mobile frame is slidably provided with sliding blocks on the upper and lower sides of the two vertical sections, the sliding blocks are movably provided with horizontal rods extending on the front and back sides, and the two mounting frames in the right clamping assembly are arranged on the opposite surfaces of the two horizontal rods, respectively; the clamping assembly further comprises sliding blocks, the opposite surfaces of the two mounting frames on the front and back sides are slidably provided with sliding blocks on the upper and lower sides, the clamping blocks are fixedly arranged on the corresponding sliding blocks, the mounting frames are rotatably provided with bidirectional threaded rods arranged vertically, the bidirectional threaded rods penetrate through the corresponding two sliding blocks and are threadedly matched with the sliding blocks.

3. The polishing apparatus for deburring of an injection molded part of an automobile according to claim 2, characterized in that: when the clamping blocks are in contact with the injection molding parts during the sanding of the arc surface, the axes of the arc surfaces of the injection molding parts are collinear with the axes of the horizontal rods.

4. The polishing apparatus for deburring of an injection molded part of an automobile according to claim 1, characterized in that: the guide unit comprises guide columns, the right end surfaces of the mobile frame are fixedly provided with guide columns extending on the left and right sides, and the sanding machine is fixedly provided with a butt plate, and the butt plate is provided with a butt groove.

5. The polishing apparatus for deburring of an injection molded part of an automobile according to claim 2, characterized in that: ​ 6. The polishing apparatus for deburring of an injection molded part of an automobile according to claim 5, characterized in that: The left end face of the sliding block is provided with a locking groove, the left end face of the vertical section of the moving frame is provided with a locking pin which slides left and right, and the locking pin and the moving frame are jointly provided with a return spring, and the right end face of the waist-shaped block is fixedly provided with a pressing piece for pressing the locking pin; The axis of the locking pin is located at the middle position of the axes of the two adjacent plug-in columns; The matching column is inserted into the matching groove of the movable sleeve component away from the mounting frame, and the polishing operation process of the adaptive arc-shaped surface burr is performed.

7. The polishing apparatus for deburring of an injection molded part of an automobile according to claim 6, characterized in that: The movable sleeve component close to the mounting frame is fixedly connected with the corresponding sliding block; The matching column is inserted into the matching groove on the movable sleeve component close to the mounting frame, the locking pin is located outside the locking groove, through the cooperation between the two matching columns and the matching grooves, the sliding block drives the two clamping assemblies to move up and down, and the polishing operation process of the adaptive flat surface burr is performed.

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