Surface treatment equipment for injection molded part before coating

Abstract

Surface treatment equipment before injection molding part coating comprises an equipment mounting frame (1), a working platform (4) is arranged at the bottom of the equipment mounting frame (1), a positioning tire film structure (2) is mounted on the working platform (4), a six-axis mechanical arm (3) is mounted at the top of the equipment mounting frame (1), and a plasma flame gun (5) is mounted at the tail end of the six-axis mechanical arm (3). The device is simple in structure, and can be used for improving the surface tension of a complex angle surface, so that the surface paint adhesive force is stronger, a coating paint film is thicker and better in quality, a bulge at a parting line part of an injection molding part can be treated during coating, the coating appearance is smooth, and the consumption of a large amount of grinding tool cost and labor cost is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of workpiece coating, and in particular relates to a surface treatment device for injection molded parts before coating. Background Art

[0002] Injection molding is a method of forming and manufacturing workpieces, which is usually divided into rubber injection molding and plastic injection molding. Injection molding is achieved through injection molding machines and molds. The injection molded products produced by it will inevitably produce parting lines to ensure that the products can be smoothly removed from the mold. However, when the injection molded parts are painted, if there is a parting line on the painting surface, it is necessary to completely polish it in advance and clean the dust generated by polishing before painting the parts. However, the polishing process is inefficient and relies on manual labor. The sandpaper used for polishing is also a consumable, resulting in excessively high polishing tool costs and labor costs.

[0003] In the prior art, a patent document with a publication number of CN 220160317 U discloses a spraying device for industrial injection molded parts, which relates to the technical field of spraying equipment, and includes a main body and a spraying mechanism. The front end of the main body is rotatably connected to a door, and a handle is welded to the front end of the door. An observation window is arranged on one side of the handle. A controller is clamped on one side of the main body. A spraying mechanism is arranged inside the main body. A rotating motor is arranged at the bottom end of the inner wall of the main body, and a rotating horizontal plate is arranged at the top of the rotating motor. A telescopic plate is welded to the top of the rotating horizontal plate. When the device is started, the rotating motor drives the rotating horizontal plate to rotate, so that the nozzle frame can rotate around the injection molded part. After the spraying is completed on all sides, the injection molded part is rotated 90 degrees under the setting of the rotating shaft and continues to spray, so as to ensure the uniformity of the spraying on the surface of the injection molded part. The above scheme increases the pressure to make the paint spray more uniform, and at the same time, the surface of the injection molded part is sprayed comprehensively by rotation; however, it still cannot be handled when the parting line of the injection molded part is painted. Utility Model Content

[0004] 1. Technical Problems Solved

[0005] In view of the deficiencies in the prior art, the utility model proposes a device with a simple structure, which can improve the surface tension of surfaces with complex angles, thereby making the surface paint more adherent, making the paint film thicker and of better quality, and can process the protrusions of the parting line of the injection molded parts during painting, making the painted appearance smooth, and avoiding the consumption of a large amount of grinding tool costs and labor costs for injection molded parts before painting.

[0006] 2. Specific technical solutions

[0007] A surface treatment device for injection molded parts before painting includes an equipment mounting frame, a working platform is arranged at the bottom of the equipment mounting frame, a positioning fetal membrane structure is installed on the working platform, a six-axis robotic arm is installed on the top of the equipment mounting frame, and a plasma flame gun is installed at the end of the six-axis robotic arm for baking on the surface of the injection molded parts by reciprocating motion.

[0008] Preferably: the six-axis robotic arm includes a rotating mounting seat, a rotating arm, a first lifting arm, a second lifting arm, a rotating fork arm and a lifting fork arm, the rotating mounting seat is fixedly mounted on the top of the equipment mounting frame, the rotating arm is rotatably mounted on the bottom of the rotating mounting seat, the side of the rotating arm is rotatably connected to one end of the first lifting arm, the side of the other end of the first lifting arm is rotatably connected to one end of the second lifting arm, the rotating fork arm is rotatably mounted on the other end of the second lifting arm, the rotating fork arm has a U-shaped mounting portion, a lifting fork arm is rotatably mounted in the U-shaped mounting portion, a gun head mounting frame is rotatably mounted on the lifting fork arm, and the plasma flame gun is mounted in the gun head mounting frame.

[0009] Preferably, after the plasma flame gun performs reciprocating motion and baking at the parting line of the injection molded part, the surface tension of the parting line and its vicinity reaches above 70 dynes / cm.

[0010] Preferably, barrier nets are provided on three sides of the equipment mounting frame.

[0011] Preferably: the positioning fetal membrane structure includes a base and an intermediate adjustable mounting frame, a rotating cylinder is arranged in the middle of the base, the output end of the rotating cylinder is connected to the middle of the intermediate adjustable mounting frame, positioning holes are also opened around the bottom of the intermediate adjustable mounting frame, a ball structure is arranged on the top of the base, the ball structure cooperates with the positioning hole, and a number of shaping plates and limit columns are also installed on the intermediate adjustable mounting frame.

[0012] Preferably, the middle adjustable mounting frame is assembled from aluminum profiles with grooves on four sides.

[0013] The beneficial effects of the utility model are as follows: under the control and adjustment of various angles of the six-axis robot arm, the plasma flame gun can accurately bake the injection molded parts at various angles, thereby improving the surface tension of the injection molded parts, and can handle injection molded parts with complex structures. The higher the surface tension of the injection molded parts, the stronger the paint adhesion on the surface, and the paint film can be made thicker and of better quality during painting; when the plasma flame gun performs reciprocating motion baking at the parting line position of the injection molded parts, the surface tension of the parting line and its vicinity reaches more than 70 dynes / cm, and the parting line with a height of no more than 0.05mm can be processed, so that the paint film at the parting line position is thicker and thus covers the parting line, and a good coating appearance can be obtained without polishing, thereby reducing the working hours of employees in handling parts, eliminating the use of consumable sandpaper, avoiding the consumption of a large amount of polishing tool costs and labor costs, and no longer generating polishing dust at the production site, thereby optimizing the production environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the structure of the positioning membrane structure and the six-axis robotic arm in the utility model.

[0016] Figure 3 It is a schematic diagram of the structure of the six-axis robotic arm in the utility model.

[0017] In the figure: equipment mounting frame 1; positioning membrane structure 2; six-axis robot arm 3; working platform 4; plasma flame gun 5; blocking net 6; rotating mounting seat 31; rotating big arm 32; first lifting big arm 33; second lifting big arm 34; rotating small arm 35; lifting small arm 36; gun head mounting frame 37; base 21; middle adjustable mounting frame 22; rotating cylinder 23. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0020] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Example:

[0022] like Figure 1 , Figure 2 and Figure 3 As shown: a surface treatment device for injection molded parts before painting, provided with a device mounting frame 1, a working platform 4 is provided at the bottom of the device mounting frame 1, a positioning membrane structure 2 is installed on the working platform 4, a six-axis mechanical arm 3 is installed on the top of the device mounting frame 1, and a plasma flame gun 5 is installed at the end of the six-axis mechanical arm 3 for baking on the surface of the injection molded parts by reciprocating motion. Blocking nets 6 are provided on the three sides of the device mounting frame 1 to ensure the safety of processing and maintain ventilation.

[0023] The six-axis robot arm 3 includes a rotating mounting seat 31, a rotating arm 32, a first lifting arm 33, a second lifting arm 34, a rotating arm 35 and a lifting arm 36. The rotating mounting seat 31 is fixedly mounted on the top of the equipment mounting frame 1, the rotating arm 32 is rotatably mounted on the bottom of the rotating mounting seat 31, the side of the rotating arm 32 is rotatably connected to one end of the first lifting arm 33, the other end of the first lifting arm 33 is rotatably connected to one end of the second lifting arm 34, and the rotating arm 35 is rotatably mounted. At the other end of the second lifting arm 34, the rotating arm 35 has a U-shaped mounting portion, in which a lifting arm 36 is rotatably mounted, and a gun head mounting frame 37 is rotatably mounted on the lifting arm 36, and the plasma flame gun 5 is mounted in the gun head mounting frame 37. All rotating parts of the six-axis robot 3 are realized by the control of the servo and the motor, and the lifting direction is the vertical height increase relative to the horizontal plane during the swinging process, and the rotation direction is only the relative 360° rotation adjustment angle between the two components.

[0024] Therefore, under the control and adjustment of each angle of the six-axis robot arm 3, the plasma flame gun 5 can accurately bake the injection molded parts at various angles, thereby increasing the surface tension of the injection molded parts, and can handle injection molded parts with complex structures. The higher the surface tension of the injection molded parts, the stronger the paint adhesion on the surface, and the thicker the paint film can be when painting. After the plasma flame gun 5 is baked by reciprocating motion at the parting line position of the injection molded part, the surface tension of the parting line and the vicinity reaches more than 70 dynes / cm, and the parting line with a height not higher than 0.05mm can be processed, so that the paint film at the parting line position is thicker and thus covers the parting line, and a good coating appearance can be obtained without polishing, thereby reducing the working hours of employees handling parts, eliminating the use of consumable sandpaper, and no longer generating grinding dust at the production site, optimizing the production environment, and the control of the parting line height can be achieved by modifying the mold structure. The surface tension of the injection molded part after processing can be maintained for about a week, so the subsequent painting work can be completed within a week.

[0025] When performing surface treatment on new injection molded parts before painting, it is necessary to debug and program the movement path of the six-axis robot arm 3. After each baking on the parting line and its vicinity, use a special test pen to test the surface tension value. After confirming that the required surface tension value is reached, determine the baking route and program the movement. As long as the movement path and speed of the six-axis robot arm 3 are consistent, the surface tension value of the injection molded parts will be stable within the same range.

[0026] The above-mentioned positioning fetal membrane structure 2 includes a base 21 and an intermediate adjustable mounting frame 22. A rotating cylinder 23 is arranged in the middle of the base 21. The output end of the rotating cylinder 23 is connected to the middle of the intermediate adjustable mounting frame 22. Positioning holes are also opened around the bottom of the intermediate adjustable mounting frame 22. A ball structure is arranged on the top of the base 21. The ball structure cooperates with the positioning hole. A number of shaping plates and limit columns are also installed on the intermediate adjustable mounting frame 22. The intermediate adjustable mounting frame 22 is assembled from aluminum profiles with grooves on four sides, which is convenient for adjusting the installation of shaping plates or limit columns of different heights at different positions.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention shall be defined by the appended claims.

Claims

1. A surface treatment device for injection molded parts before painting, characterized in that: The invention comprises an equipment mounting frame (1), a working platform (4) is arranged at the bottom of the equipment mounting frame (1), a positioning fetal membrane structure (2) is installed on the working platform (4), a six-axis robot arm (3) is installed on the top of the equipment mounting frame (1), and a plasma flame gun (5) is installed at the end of the six-axis robot arm (3) for baking by reciprocating motion on the surface of the injection molded part.

2. The surface treatment equipment for injection molded parts before painting according to claim 1, characterized in that: The six-axis robot arm (3) comprises a rotating mounting seat (31), a rotating arm (32), a first lifting arm (33), a second lifting arm (34), a rotating arm (35) and a lifting arm (36); the rotating mounting seat (31) is fixedly mounted on the top of the equipment mounting frame (1); the rotating arm (32) is rotatably mounted on the bottom of the rotating mounting seat (31); the side of the rotating arm (32) is rotatably connected to one end of the first lifting arm (33); the side of the other end of the first lifting arm (33) is rotatably connected to one end of the second lifting arm (34); the rotating arm (35) is rotatably mounted on the other end of the second lifting arm (34); the rotating arm (35) has a U-shaped mounting portion, in which a lifting arm (36) is rotatably mounted; a gun head mounting frame (37) is rotatably mounted on the lifting arm (36); and the plasma flame gun (5) is mounted in the gun head mounting frame (37).

3. The surface treatment equipment for injection molded parts before painting according to claim 1 or 2, characterized in that: After the plasma flame gun (5) performs reciprocating firing at the parting line of the injection molded part, the surface tension of the parting line and its vicinity reaches above 70 dyne / cm.

4. The surface treatment equipment for injection molded parts before painting according to claim 1, characterized in that: Blocking nets (6) are arranged on three sides of the equipment mounting frame (1).

5. The surface treatment equipment for injection molded parts before painting according to claim 1, characterized in that: The positioning fetal membrane structure (2) includes a base (21) and an intermediate adjustable mounting frame (22), a rotating cylinder (23) is arranged in the middle of the base (21), the output end of the rotating cylinder (23) is connected to the middle of the intermediate adjustable mounting frame (22), positioning holes are also opened around the bottom of the intermediate adjustable mounting frame (22), a ball structure is arranged on the top of the base (21), the ball structure cooperates with the positioning hole, and a plurality of shaping plates and limiting columns are also installed on the intermediate adjustable mounting frame (22).

6. The surface treatment equipment for injection molded parts before painting according to claim 5, characterized in that: The middle adjustable mounting frame (22) is assembled from aluminum profiles with grooves on four sides.

Images