CN112090711A - Surface hardening treatment method for plastic workpiece - Google Patents
Surface hardening treatment method for plastic workpiece Download PDFInfo
- Publication number
- CN112090711A CN112090711A CN202010977063.8A CN202010977063A CN112090711A CN 112090711 A CN112090711 A CN 112090711A CN 202010977063 A CN202010977063 A CN 202010977063A CN 112090711 A CN112090711 A CN 112090711A
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- workpiece
- plastic workpiece
- rotary
- plastic
- jig
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C13/00—Means for manipulating or holding work, e.g. for separate articles
- B05C13/02—Means for manipulating or holding work, e.g. for separate articles for particular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0208—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to separate articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
- B05C9/12—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Apparatus (AREA)
Abstract
The invention relates to a surface hardening treatment method for a plastic workpiece, which comprises the following steps: at a feeding station, transferring the plastic workpieces to a jig arranged on a turntable one by one through a vibration feeding mechanism; at a rotary point coating station, carrying out rotary point coating on the surface of the plastic workpiece on the jig through a rotary point coating mechanism, so that paint is uniformly coated on the surface of the plastic workpiece; at a blanking station, taking down the spot-coated plastic workpiece from the jig through a blanking mechanism and transferring the spot-coated plastic workpiece to a baking line; and carrying out baking hardening treatment on the paint on the surface of the plastic workpiece through UV light on a baking line. According to the invention, the turntable type workbench is arranged, so that the length of a production line is reduced, the occupied space is saved, the paint coating uniformity is improved by a rotary point coating mode, burrs are avoided, and the product yield is improved.
Description
Technical Field
The invention relates to the field of plastic workpiece manufacturing, in particular to a surface hardening treatment method for a plastic workpiece.
Background
The surface coating technology of general plastic products carries out hardening treatment, the existing spraying process adopts a flow line operation mode, and the flow is generally as follows: the method has the advantages of cleanness- > hanging- > spraying- > baking- > hanging, the length range of the operation assembly line of the existing process flow is 200-2000 m, the requirement on the field environment is high, the required field space is large, the production line investment is large, the cost is high, the manufacturing period is long, and the method is slow to respond to the faster and faster proofing requirements of customers. In addition, the existing traditional coating process also has the problems of easy occurrence of defects such as edge burrs, paint accumulation and the like, so that the production yield loss is caused and the cost is increased.
Disclosure of Invention
The present invention is to provide a surface hardening treatment method for plastic workpieces to solve the above problems. Therefore, the invention adopts the following specific technical scheme:
a surface hardening treatment method for a plastic workpiece comprises the following steps:
at a feeding station, transferring the plastic workpieces to a jig arranged on a turntable one by one through a vibration feeding mechanism;
at a rotary point coating station, carrying out rotary point coating on the surface of the plastic workpiece on the jig through a rotary point coating mechanism, so that paint is uniformly coated on the surface of the plastic workpiece;
at a blanking station, taking down the spot-coated plastic workpiece from the jig through a blanking mechanism and transferring the spot-coated plastic workpiece to a baking line;
and carrying out baking hardening treatment on the paint on the surface of the plastic workpiece through UV light on a baking line.
Further, vibration feed mechanism includes the vibration dish, directly shakes delivery track and material loading arm, directly shakes the discharge gate of delivery track's one end connection vibration dish, and the other end is the material loading mouth, and material loading arm is used for absorbing plastic work piece and shifting from the material loading mouth and places on the tool.
Further, the jig comprises a rotary mounting seat, a bearing seat and a suction head, the bearing seat is fixed on the turntable, the rotary mounting seat is rotatably mounted on the bearing seat through the bearing, and the suction head is fixed at the upper end of the rotary mounting seat and used for sucking the plastic workpiece.
Further, the rotary spot coating mechanism comprises a rotary driving assembly and a spot coating assembly, wherein the rotary driving assembly comprises a high-speed motor, a motor mounting seat, a first lifting module, a connecting piece, the spot coating assembly and a second lifting module; the point coating component comprises a nozzle and a second lifting module, the second lifting module is fixedly mounted on the workbench, and the nozzle is fixedly mounted on the second lifting module and located right above the plastic workpiece.
Furthermore, the connecting piece comprises a disc main body and a plurality of connecting columns which are vertically arranged on the disc main body, through holes corresponding to the connecting columns are formed in the rotary mounting seat, and the connecting columns are inserted into the through holes and separated from the through holes through ascending and descending of the first lifting module.
Further, the rotation speed of the high-speed motor is 10000-.
Further, the blanking mechanism comprises a blanking mechanical arm and a conveying belt, the blanking mechanical arm is used for sucking the workpiece which is point-coated from the jig and placing the workpiece on the conveying belt, and the conveying belt is used for conveying the workpiece to a baking line.
Further, the method comprises the steps of: and taking the baked workpiece out of the baking line for detection and dishing.
Furthermore, the paint has good fluidity, and the proportion of the curing agent to the diluent is less than 100: 3.
Further, the baking time is 15-30 minutes.
By adopting the technical scheme, the invention has the beneficial effects that: according to the invention, the turntable type workbench is arranged, so that the length of a production line is reduced, the occupied space is saved, the paint coating uniformity is improved by a rotary point coating mode, burrs are avoided, and the product yield is improved.
Drawings
To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
FIG. 1 is a schematic of a flow line used in the process of the present invention;
FIG. 2 is a perspective view of the rotary point coating device of the line shown in FIG. 1;
FIG. 3 is a perspective view of the turntable of the rotary point coating device shown in FIG. 2;
FIG. 4 is a perspective view of a fixture on the turntable shown in FIG. 3;
FIG. 5 is a perspective view of a loading robot arm of the rotary dot coating device shown in FIG. 2;
fig. 6 is a perspective view of a rotary drive assembly of the rotary point coating device shown in fig. 2.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and detailed description.
Referring to fig. 1 and 2, a surface hardening treatment method for a plastic workpiece is described, which mainly comprises the following process flows: feeding- > rotary point coating- > blanking- > UV baking- > finished product placing plate, wherein the production line is shown in figure 1. Here, the feeding, the spin coating, and the discharging are performed by the spin coating apparatus shown in fig. 2, and the UV baking and the finished wobble plate may be performed using the existing equipment. The rotary point coating device mainly comprises a workbench 1, a rotary table 2, a feeding mechanism 3, a rotary point coating mechanism 4 and a discharging mechanism 5, wherein the rotary table 2, the feeding mechanism 3, the rotary point coating mechanism 4 and the discharging mechanism 5 are installed on the workbench 1. Namely, the workbench 1 is provided with a feeding station, a rotary spot coating station and a blanking station around the turntable 2, and the feeding mechanism 3, the rotary spot coating mechanism 4 and the blanking mechanism 5 are respectively arranged on the feeding station A, the rotary spot coating station B and the blanking station C. The turntable 2 is provided with three jigs 21 which respectively correspond to three stations of feeding, rotary spot coating and blanking. Thus, in particular, the method may comprise the steps of:
at a feeding station A, the plastic workpieces 100 are transferred to the jigs 21 on the turntable 2 one by one through the vibration feeding mechanism 3;
at the rotary point coating station B, the surface of the plastic workpiece 100 on the jig 21 is subjected to rotary point coating through the rotary point coating mechanism 4, so that the paint is uniformly coated on the surface of the plastic workpiece 100; here, the paint is sprayed onto the middle of the surface of the plastic workpiece 100 through the nozzle 421 of the spot-coating group 42, the plastic workpiece 100 is driven to rotate at a high speed (for example, 10000-; the paint is required to have good fluidity, and preferably, the ratio (weight percentage) of the curing agent to the diluent in the paint is less than 100: 3;
at a blanking station C, the plastic workpiece 100 which is point-coated is taken down from the jig 21 by a blanking mechanism 5 and transferred to a baking line;
carrying out baking hardening treatment on the paint on the surface of the plastic workpiece on a baking line through UV light; the UV drying curing time is required to be moderate, and is usually controlled to be 15-30 minutes, so that the defects that the product appearance surface is not smooth and orange peel and the like are generated due to too long baking time are avoided;
and taking the baked workpiece out of the baking line for detection and dishing-up, which is a conventional process and will not be described here.
The respective mechanisms and operation of the rotary dot coating apparatus will be described in detail below. As shown in fig. 2 and 5, the vibration feed mechanism 3 includes a vibration plate 31, a straight vibration conveying rail 32, and a feed robot arm 33. One end of the direct vibration conveying track 32 is connected with the discharge port of the vibration disc 31, and the other end is a feeding port. The vibrating plate 31 is used for sending the plastic workpiece 100 to the straight vibrating conveying track 32 with the surface facing upward, and the specific structure thereof is easily designed by those skilled in the art according to the shape of the plastic workpiece 100 and will not be described herein. The linear vibration conveying rail 32 is constituted by a linear vibration device and a conveying rail fixed to the linear vibration device. Preferably, a cover plate is provided on the conveying rail to prevent the plastic work 100 from being shaken out. The feeding mechanical arm 33 is used for sucking the plastic workpiece 100 from the feeding port of the direct vibration conveying track 32 and transferring and placing the plastic workpiece onto the jig 21. Specifically, the loading robot arm 33 includes a two-axis motion module 331 and a chuck assembly 332 mounted on the two-axis motion module 331. The suction cup assembly 332 moves to the feeding port through the two-axis motion module 331, sucks the plastic workpiece 100 from the feeding port, and moves to the jig 21 on the turntable 2 through the two-axis motion module 331. Here, the two-axis motion module 331 is pneumatic, but may be electric. Specifically, the two-axis motion module 331 includes a bracket 3311, a lifting cylinder 3312, a lifting rail 3313, a mounting block 3314, a traverse cylinder 3315, and a traverse rail 3316. The lifting cylinder 3312 and the lifting slide rail 3313 are fixedly mounted on the support 3311, and the mounting block 3314 is fixed on the lifting slide rail 3313 and connected with the telescopic rod of the lifting cylinder 3312. The traversing cylinder 3315 and the traversing slide rail 3316 are fixedly mounted on the mounting block 3314 and the traversing cylinder 3315 is drivingly connected to the slide of the traversing slide rail 3316. The suction cup assembly 332 is fixed to the slider of the lateral slide rail 3316. The suction cup assembly 332 can be moved up and down by the elevation cylinder 3312 and back and forth by the traverse cylinder 3315 to be moved to a desired position.
As shown in fig. 2 to 4, the jig 21 includes a rotary mounting base 211, a bearing 212, a bearing base 213, and a suction head 214. The bearing block 213 is fixed (e.g., by screws) to the turntable 2. The rotary mounting block 211 is rotatably mounted on a bearing block 213 by a bearing 212 and is rotated by a high-speed motor 41. A specific driving connection structure of the rotation mount 211 and the high-speed motor 41 will be described below. The suction head 214 is fixed to the upper end of the rotary mounting seat 211 for sucking the plastic work piece. Specifically, the suction head 214 has a cylindrical shape with a small diameter at the top to form a shoulder, and a plurality of suction holes 2141 are formed on the top surface so that the plastic work 100 can be firmly sucked to the suction head 214. In the illustrated embodiment, the suction head 214 is also provided on its outer face with a pair of diametrically opposed axial recesses 2142 to facilitate separation of the plastic work piece 100 from the suction head 214.
As shown in fig. 2 and 6, the rotary dispensing mechanism 4 includes a rotary drive assembly 41 and a dispensing assembly 42. The rotation driving assembly 41 includes a high-speed motor 411, a motor mounting base 412, a first lifting module 413, and a connecting member 414. The first lifting module 413 is fixed on the working platform 1, and is a commercially available sliding table cylinder. The motor mount 412 is fixed (e.g., by screws) to the first lifting module 413, and the high-speed motor 411 is fixed (e.g., by screws) to the motor mount 412. The connecting member 414 is fixed (e.g., by a screw) to an output shaft of the high-speed motor 411 for connection with the rotary mounting seat 211 of the jig 21. Specifically, the connection member 414 may be raised or lowered by the first lifting module 413 to be connected to or disconnected from the rotation mount 211. In this embodiment, the connecting member 414 includes a disk body 4141 and a plurality of connecting columns 4142 (three are shown and are different from each other by 120 degrees) erected on the disk body, the rotating mounting seat 211 is provided with (three) through holes 2111 corresponding to the plurality of connecting columns 4142, and when connection is required, the first lifting module 413 drives the connecting columns 4142 to ascend and is inserted into the through holes 2111; when the connection column 4142 is driven to descend by the first lifting module 413, and the connection column is separated from the through hole 2111. The dispensing assembly 42 includes a nozzle 421 and a second lift module 422. The nozzle 421 is installed on the second lifting module 422 (specifically, the slider) and is located right above the plastic workpiece 100. The second lift module 422 may be pneumatic or electric. In one embodiment, the second lift module 422 is a commercially available silver light high precision electric slide BS series. When the spot coating is needed, the second lifting module 422 drives the nozzle 421 to descend to be close to the plastic workpiece 100, meanwhile, the first lifting module 413 drives the connecting column 4142 to ascend to be connected with the rotary mounting seat 211, then, the high-speed motor 411 rotates, meanwhile, the nozzle 421 acts to finish the rotary spot coating, then, the second lifting module 422 drives the nozzle 421 to ascend to be away from the workpiece, meanwhile, the high-speed motor 411 stops rotating, then, the first lifting module 413 drives the connecting column 4142 to descend to be separated from the rotary mounting seat 211, the rotary disc 2 rotates, the spot coated workpiece enters the next station (blanking station), and a product at the feeding station enters the rotary spot coating station.
As shown in fig. 2, the blanking mechanism 5 includes a blanking robot 51 and a conveyor belt 52, wherein the blanking robot 51 is used for sucking the spot-coated plastic workpiece 100 from the jig 21 and placing the spot-coated plastic workpiece on the conveyor belt 52. The structure of the blanking robot 51 is the same as that of the loading robot 33 and will not be described here. A conveyor belt 52 is arranged between the table 1 and the baking line for conveying the work pieces to the baking line. It should be understood that in some embodiments, the conveyor belt 52 may be omitted, and the blanking mechanism 5 directly takes the plastic workpiece 100 from the jig 21 to the baking line. The structure of the conveyor belt 52 is well known and will not be described here.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A surface hardening treatment method for a plastic workpiece is characterized by comprising the following steps:
at a feeding station, transferring the plastic workpieces to a jig arranged on a turntable one by one through a vibration feeding mechanism;
at a rotary point coating station, carrying out rotary point coating on the surface of the plastic workpiece on the jig through a rotary point coating mechanism, so that paint is uniformly coated on the surface of the plastic workpiece;
at a blanking station, taking down the spot-coated plastic workpiece from the jig through a blanking mechanism and transferring the spot-coated plastic workpiece to a baking line;
and carrying out baking hardening treatment on the paint on the surface of the plastic workpiece through UV light on a baking line.
2. The method for surface hardening of plastic workpieces according to claim 1, wherein the vibrating feeding mechanism comprises a vibrating tray, a straight vibrating conveying rail and a feeding mechanical arm, one end of the straight vibrating conveying rail is connected with the discharge port of the vibrating tray, the other end of the straight vibrating conveying rail is a feeding port, and the feeding mechanical arm is used for sucking the plastic workpieces from the feeding port and transferring the plastic workpieces to the jig.
3. The method of claim 1, wherein the jig comprises a rotary mounting base, a bearing seat and a suction head, the bearing seat is fixed on the turntable, the rotary mounting base is rotatably mounted on the bearing seat through the bearing, and the suction head is fixed on the upper end of the rotary mounting base for sucking the plastic workpiece.
4. The plastic workpiece surface hardening treatment method according to claim 3, wherein the rotary spot coating mechanism comprises a rotary driving assembly and a spot coating assembly, wherein the rotary driving assembly comprises a high-speed motor, a motor mounting seat, a first lifting module, a connecting piece, a spot coating assembly and a second lifting module, the first lifting module is fixedly arranged on the workbench, the motor mounting seat is fixed on the first lifting module, the high-speed motor is fixed on the motor mounting seat, and the connecting piece is fixed on an output shaft of the high-speed motor and is detachably connected with the rotary mounting seat in a driving manner; the point coating component comprises a nozzle and a second lifting module, the second lifting module is fixedly mounted on the workbench, and the nozzle is fixedly mounted on the second lifting module and located right above the plastic workpiece.
5. The method for hardening the surface of a plastic workpiece as recited in claim 4, wherein the connecting member includes a disk body and a plurality of connecting columns erected on the disk body, the rotary mounting base is provided with through holes corresponding to the plurality of connecting columns, and the connecting columns are inserted into and removed from the through holes by the ascending and descending of the first lifting module.
6. The method as claimed in claim 4, wherein the rotation speed of the high-speed motor is 10000-15000 RPM.
7. The method of claim 1, wherein the unloading mechanism comprises an unloading robot and a conveyor, the unloading robot is used for sucking the spot-coated workpiece from the jig and placing the spot-coated workpiece on the conveyor, and the conveyor is used for conveying the workpiece to the baking line.
8. The method for surface hardening a plastic workpiece according to claim 1, further comprising the steps of: and taking the baked workpiece out of the baking line for detection and dishing.
9. The method for surface hardening a plastic workpiece according to claim 1, wherein the paint has good fluidity and the ratio of the curing agent to the diluent is less than 100: 3.
10. The method of claim 1, wherein the baking time is 15-30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010977063.8A CN112090711A (en) | 2020-09-17 | 2020-09-17 | Surface hardening treatment method for plastic workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010977063.8A CN112090711A (en) | 2020-09-17 | 2020-09-17 | Surface hardening treatment method for plastic workpiece |
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| CN112090711A true CN112090711A (en) | 2020-12-18 |
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| CN202010977063.8A Pending CN112090711A (en) | 2020-09-17 | 2020-09-17 | Surface hardening treatment method for plastic workpiece |
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2020
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| CN211351999U (en) * | 2020-03-23 | 2020-08-25 | 台州市黄岩鑫威自动化有限公司 | Bearing assembling and gluing equipment for motor end cover of electric vehicle |
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Application publication date: 20201218 |
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| RJ01 | Rejection of invention patent application after publication |