CN116442508A - Processing method of plastic-suction formed LED luminous cap shell - Google Patents
Processing method of plastic-suction formed LED luminous cap shell Download PDFInfo
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- CN116442508A CN116442508A CN202310282146.9A CN202310282146A CN116442508A CN 116442508 A CN116442508 A CN 116442508A CN 202310282146 A CN202310282146 A CN 202310282146A CN 116442508 A CN116442508 A CN 116442508A
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- cap shell
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- molded
- plastic
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- 238000003672 processing method Methods 0.000 title claims abstract description 11
- 238000007639 printing Methods 0.000 claims abstract description 29
- 238000000465 moulding Methods 0.000 claims abstract description 18
- 239000004033 plastic Substances 0.000 claims abstract description 15
- 239000006260 foam Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 36
- 239000000084 colloidal system Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000010097 foam moulding Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/30—Moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/261—Handling means, e.g. transfer means, feeding means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/42—Heating or cooling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
The invention relates to the technical field of processing of luminous cap shells, and discloses a processing method of a plastic-sucking formed LED luminous cap shell, which comprises the following steps: (1) Printing the transparent sheet with ink, and performing plastic suction molding to obtain a molded cap shell; (2) After the molded cap shell is placed on the fixed base, the ink layer faces upwards, and the required embedded LED lamp strip area is irradiated in a laser ink removing mode, printing ink in a local area is removed, and the cap shell after processing is obtained; (3) And mounting an LED lamp strip in the transparent area of the processed cap shell after removing the printing ink, covering the EPS layer, and carrying out foam integrated molding on the processed cap shell, the LED lamp strip and the EPS layer to obtain the LED luminous cap shell. The invention uses the laser de-inking technology, does not need to consider the light transmission position of the LED and reserve the unprinted area, and is suitable for plastic-sucking cap shell products which have high requirements on graphic precision and need to be printed without ink at the designated position.
Description
Technical Field
The invention relates to the technical field of processing of luminous cap shells, in particular to a processing method of a plastic-sucking formed LED luminous cap shell.
Background
The cap shell is a common article in daily life and work of people, and has various kinds, wherein the luminous cap shell not only can increase the safety of traveling and working at night, but also can increase the decorative and attractive effects.
Currently, the commonly used luminous cap shells comprise a cap shell which emits light by means of a reflecting plate and a cap shell which emits light by means of an LED lamp. The cap shell which emits light by the reflecting plate mainly depends on the light reflected by the reflecting plate to emit light, has extremely high requirements on the intensity of an external light source and the angle of the light source, and has weaker luminous intensity and smaller luminous area in the use process. The cap shell which emits light by the LED lamp mainly emits light by the LED lamp, is less influenced by the outside, and the luminous intensity can better meet the daily life requirement, so that the cap shell which emits light by the LED lamp is gradually applied.
The cap shell is usually prepared by adopting an ink printing and plastic sucking forming process, and the light of the LED cannot penetrate through the ink, so that the position where the lamp strip needs to be installed is planned in the printing stage in the conventional production process, and then printing is not performed, but the plastic sucking forming process is a stretching forming process, so that the printing area can be stretched in the forming process to cause dislocation, the limitation of the shape of the product is very large, and the functional requirement is difficult to reach.
Disclosure of Invention
In order to solve the technical problems, the invention provides a processing method of a plastic-sucking formed LED luminous cap shell, which is characterized in that after conventional printing and plastic sucking processes are carried out, a subsequent process of removing ink by laser is added, the shape of an original formed product is not influenced, and meanwhile, an area from which the ink is removed is ensured to have excellent light transmittance, so that the plastic-sucking formed LED luminous cap shell is better applied to a luminous cap shell product needing to be integrally formed with an embedded LED lamp strip.
The aim of the invention is realized by the following technical scheme: the invention provides a processing method of a plastic-sucking formed LED luminous cap shell, which comprises the following steps:
(1) Printing the transparent sheet with ink, and performing plastic suction molding to obtain a molded cap shell;
(2) After the molded cap shell is placed on the fixed base, the ink layer faces upwards, and the required embedded LED lamp strip area is irradiated in a laser ink removing mode, printing ink in a local area is removed, and the cap shell after processing is obtained;
(3) And mounting an LED lamp strip in the transparent area of the processed cap shell after removing the printing ink, covering the EPS layer, and carrying out foam integrated molding on the processed cap shell, the LED lamp strip and the EPS layer to obtain the LED luminous cap shell.
The invention firstly prints the needed pattern on the transparent sheet material by the printing machine, and then the printed sheet material is required to be subjected to plastic suction molding to obtain the molded cap shell. Then, a desired ink removing area is drawn on a laser machine, laser power frequency and the like are set, and printing ink on the surface of the workpiece is removed by irradiating the workpiece with laser light, so that the set area is in a transparent state when no printing is performed. And then the LED lamp strip can be correctly arranged at the transparent position in the subsequent cap shell production, and the required LED luminous cap shell is obtained through the integrated molding of the processed cap shell, the LED lamp strip and the foam of the EPS layer.
The laser ink removing process is a subsequent process, and the workpiece can be printed and molded according to normal product requirements without considering the LED light transmission position and reserving an unprinted area. The process has little influence on the shape and the ink pattern of the original molded workpiece, and is suitable for plastic-sucking cap shells with high requirements on pattern precision and the need of ink-free printing at the designated position. In addition, foam integrated into one piece can promote the wholeness of cap shell, and the transparent area after the laser removes the printing ink can be directly aimed at in the LED lamp area, and this transparent area also can provide the LED lamp area with the accommodation space, slows down foam's pressure, guarantees cap shell finished product steadiness and wholeness.
Preferably, the laser power of the laser ink removing is 10-20W.
Preferably, the laser frequency of the laser ink removing is 15-25 KHz.
Preferably, the laser irradiation rate of the laser de-inking is 300-500 mm/s.
Preferably, in the process of removing the ink by the laser, the maximum distance from the laser focus to the surface of the molded cap shell is 33-36mm.
Preferably, the thickness of the ink layer in the molded cap shell is 0.12-0.14mm.
Preferably, the radian of the molded cap shell is pi/6-pi/4.
The cap shell needs to have a large radian, and the radian can lead to laser focusing deviation in the process of removing ink by laser, so that the uniformity of removing the ink is insufficient, and the cap shell needs to be matched with a base for use. The fixed base is a base matched with the structural shape of the formed cap shell, so that the cap shell can be kept in a stable state in the process of removing the ink by laser.
In addition, as the radian of the cap shell is larger, the thickness of the ink layer is also thicker, the laser ink removing process has higher requirements on parameter setting (comprising laser power, frequency, irradiation speed, distance and the like), and the problems of scorching of plastic sucking products or unsatisfactory ink removing effect can be avoided.
Preferably, the transparent sheet is a PC sheet, a PET sheet or a PVC sheet.
The transparent sheet material integrally molded by plastic suction is required to meet the function and production requirements of the safety helmet, but PC, PET, PVC is thermoplastic material, has low heat distortion temperature, and is easy to generate product deformation or scorch in the process of removing ink by laser, so that parameter setting is particularly important.
Preferably, the transparent sheet has a thickness of 0.4 to 0.7mm.
The light transmittance of the transparent area can be adjusted according to the actual product requirement, and the full-transparent and semi-transparent effects can be achieved.
Preferably, in the step (3), an elastic colloid layer is arranged between the LED lamp strip and the EPS layer in the foam integral molding process; the elastic colloid layer is made of EVA double faced adhesive tape material.
The foam integrated into one piece can produce great pressure and pressure, and the LED lamp area can receive the damage easily as the built-in fitting, and the elastic colloid layer of increase can alleviate pressure, plays the guard action.
Preferably, the plastic suction molding includes: and (3) after the transparent sheet is softened at a high temperature of 300-600 ℃, ejecting the transparent sheet through a die, vacuumizing and cooling.
Compared with the prior art, the invention has the following beneficial effects:
(1) After the conventional printing and plastic sucking processes are carried out, the subsequent process of removing ink by laser is added, and the light transmission positions of LEDs and the reserved unprinted areas are not needed to be considered. The process has little influence on the shape and the ink pattern of the original molded workpiece, and is applicable to plastic-sucking cap shell products with high requirements on pattern precision and the need of ink-free printing at the designated position;
(2) The cap shell needs to have a larger radian, the radian can lead to laser focusing deviation in the process of removing the ink by laser, so that the uniformity of removing the ink is insufficient, and the cap shell is used with a fixed base matched with the structural shape of the formed cap shell, so that the cap shell can keep a stable state and has a better ink removing effect;
(3) The laser de-inking process has higher requirements on parameter settings (including laser power, frequency, irradiation speed, distance and the like) so as to avoid the problems of scorching of plastic-absorbing products or unsatisfactory ink removal effect;
(4) The light transmittance of the transparent area can be adjusted according to the actual product requirement, and the full-transparent and semi-transparent effects can be achieved;
(5) Through the foam integrated into one piece in back cap shell, LED lamp area and EPS layer of processing, can guarantee cap shell finished product's steadiness and wholeness.
Drawings
FIG. 1 is a schematic view of a cap shell after processing in the present invention;
fig. 2 is a schematic structural view of a fixing base in the present invention.
The reference numerals are: cap shell 1, laser deoiling area 2, unable adjustment base 3.
Detailed Description
The technical scheme of the present invention is described below by using specific examples, but the scope of the present invention is not limited thereto:
general examples
A processing method of a plastic-sucking formed LED luminous cap shell comprises the following steps:
(1) Printing ink on a PC transparent sheet or a PET transparent sheet or a PVC transparent sheet (0.4-0.7 mm), and performing plastic suction molding, wherein the method comprises the steps of softening at 300-600 ℃ by baking at high temperature, ejecting out of a mold, vacuumizing and cooling to obtain a molded cap shell; the radian pi/6-pi/4 of the molded cap shell, and the ink layer (the thickness is 0.12-0.14 mm) is positioned on the inner surface (right against the center of the circle) of the molded cap shell;
(2) After the molded cap shell is placed on the fixed base, the ink layer faces upwards, and the required embedded LED lamp strip area is irradiated in a laser ink removing mode, printing ink in a local area is removed, and the cap shell after processing is obtained;
in the process of removing the ink by laser: the maximum distance of the laser focus from the surface of the molded cap shell (namely the distance from the lowest point of the surface of the molded cap shell) is 33-36mm, the laser power is 10-20W, the laser frequency is 15-25 KHz, and the laser irradiation rate is 300-500 mm/s;
(3) And mounting an LED lamp strip in a transparent area after the ink is removed of the machined cap shell, integrally covering an EPS layer on the upper layer of the machined cap shell, arranging the LED lamp strip in the middle, sticking an EVA double-sided adhesive material between the LED lamp strip and the EPS layer to serve as an elastic colloid layer, and then carrying out foam integrated molding on the machined cap shell, the LED lamp strip and the EPS layer to obtain the LED luminous cap shell.
Example 1
A processing method of a plastic-sucking formed LED luminous cap shell comprises the following steps:
(1) Printing the PC transparent sheet (with the thickness of 0.5 mm) with ink, performing plastic suction molding, namely softening at a high temperature of 300 ℃, ejecting through a mold, vacuumizing and cooling to obtain a molded cap shell; the radian of the molded cap shell is 2 pi/9 (radius R150 mm), and the ink layer (thickness is 0.12 mm) is positioned on the inner surface (right facing the center of the circle) of the molded cap shell;
(2) After the molded cap shell is placed on the fixed base, the ink layer faces upwards, the required embedded LED lamp strip area is irradiated by a laser ink removing mode, the printing ink in the local area is removed, and the cap shell after processing is obtained, wherein the laser ink removing areas 2 are respectively positioned at two sides of the cap shell 1, as shown in fig. 2;
in the process of removing the ink by laser: the maximum distance of the laser focus from the surface of the molded cap shell (namely the distance from the lowest point of the surface of the molded cap shell) is 35mm, the laser power is 12W, the laser frequency is 20KHz, and the laser irradiation rate is 400mm/s;
(3) And mounting an LED lamp strip in a transparent area after the ink is removed of the machined cap shell, integrally covering an EPS layer on the upper layer of the machined cap shell, arranging the LED lamp strip in the middle, sticking an EVA double-sided adhesive material between the LED lamp strip and the EPS layer to serve as an elastic colloid layer, and then carrying out foam integrated molding on the machined cap shell, the LED lamp strip and the EPS layer to obtain the LED luminous cap shell.
Example 2
A processing method of a plastic-sucking formed LED luminous cap shell comprises the following steps:
(1) Printing the PC transparent sheet (with the thickness of 0.7 mm) with ink, performing plastic suction molding, namely softening at a high temperature of 300 ℃, ejecting through a mold, vacuumizing and cooling to obtain a molded cap shell; the radian pi/4 (radius R150 mm) of the molded cap shell, and the ink layer (thickness is 0.14 mm) is positioned on the inner surface (right facing the center of the circle) of the molded cap shell;
(2) After the molded cap shell is placed on the fixed base, the ink layer faces upwards, the required embedded LED lamp strip area is irradiated in a laser ink removing mode, and printing ink in a local area is removed, so that the cap shell after processing is obtained;
in the process of removing the ink by laser: the maximum distance of the laser focus from the surface of the molded cap shell (namely the distance from the lowest point of the surface of the molded cap shell) is 33mm, the laser power is 16W, the laser frequency is 22KHz, and the laser irradiation rate is 450mm/s;
(3) And mounting an LED lamp strip in a transparent area after the ink is removed of the machined cap shell, integrally covering an EPS layer on the upper layer of the machined cap shell, arranging the LED lamp strip in the middle, sticking an EVA double-sided adhesive material between the LED lamp strip and the EPS layer to serve as an elastic colloid layer, and then carrying out foam integrated molding on the machined cap shell, the LED lamp strip and the EPS layer to obtain the LED luminous cap shell.
Example 3
A processing method of a plastic-sucking formed LED luminous cap shell comprises the following steps:
(1) Printing the PC transparent sheet (with the thickness of 0.4 mm) with ink, performing plastic suction molding, namely softening at a high temperature of 300 ℃, ejecting through a mold, vacuumizing and cooling to obtain a molded cap shell; the radian pi/4 (radius R150 mm) of the molded cap shell, and the ink layer (thickness is 0.13 mm) is positioned on the inner surface (right facing the center of the circle) of the molded cap shell;
(2) After the molded cap shell is placed on the fixed base, the ink layer faces upwards, the required embedded LED lamp strip area is irradiated in a laser ink removing mode, and printing ink in a local area is removed, so that the cap shell after processing is obtained;
in the process of removing the ink by laser: the maximum distance of the laser focus from the surface of the molded cap shell (namely the distance from the lowest point of the surface of the molded cap shell) is 36mm, the laser power is 18W, the laser frequency is 18KHz, and the laser irradiation rate is 400mm/s;
(3) And mounting an LED lamp strip in a transparent area after the ink is removed of the machined cap shell, integrally covering an EPS layer on the upper layer of the machined cap shell, arranging the LED lamp strip in the middle, sticking an EVA double-sided adhesive material between the LED lamp strip and the EPS layer to serve as an elastic colloid layer, and then carrying out foam integrated molding on the machined cap shell, the LED lamp strip and the EPS layer to obtain the LED luminous cap shell.
Examples 1-3 all achieved excellent ink removal results, high removal uniformity and transparency, and no shape, ink pattern damage and scorch of the blister product.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures disclosed herein or modifications in the equivalent processes, or any application of the structures disclosed herein, directly or indirectly, in other related arts.
Claims (10)
1. The processing method of the plastic-sucking formed LED luminous cap shell is characterized by comprising the following steps of:
(1) Printing the transparent sheet with ink, and performing plastic suction molding to obtain a molded cap shell;
(2) After the molded cap shell is placed on the fixed base, the ink layer faces upwards, and the required embedded LED lamp strip area is irradiated in a laser ink removing mode, printing ink in a local area is removed, and the cap shell after processing is obtained;
(3) And mounting an LED lamp strip in the transparent area of the processed cap shell after removing the printing ink, covering the EPS layer, and carrying out foam integrated molding on the processed cap shell, the LED lamp strip and the EPS layer to obtain the LED luminous cap shell.
2. The method for processing the plastic-sucking molded LED luminous cap shell according to claim 1, wherein the laser power for removing ink by laser is 10-20W.
3. The method for processing the plastic-sucking molded LED luminous cap shell according to claim 1, wherein the laser frequency for removing ink by laser is 15-25 KHz.
4. The method for processing the plastic-sucking molded LED luminous cap shell according to claim 1, wherein the laser irradiation rate of the laser ink removal is 300-500 mm/s.
5. The method for processing a blister molded LED lighting cap shell according to any one of claims 1 to 4, wherein a maximum distance from a laser focal point to a surface of the molded cap shell is 33 to 36mm in the laser ink removing process.
6. The method for manufacturing a blister molded LED lighting cap according to any one of claims 1 to 4, wherein the thickness of the ink layer in the molded cap is 0.12 to 0.14mm.
7. The method of manufacturing a blister molded LED lighting cap according to any one of claims 1 to 4, wherein the arc of the molded cap is pi/6 to pi/4.
8. The method of claim 6, wherein in step (3), an elastic colloid layer is disposed between the LED strip and the EPS layer during the foam molding process.
9. The method of claim 1, wherein the transparent sheet is a PC sheet, a PET sheet, or a PVC sheet.
10. The method of claim 1 or 9, wherein the transparent sheet is baked and then ejected from the mold, evacuated and cooled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310282146.9A CN116442508A (en) | 2023-03-22 | 2023-03-22 | Processing method of plastic-suction formed LED luminous cap shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310282146.9A CN116442508A (en) | 2023-03-22 | 2023-03-22 | Processing method of plastic-suction formed LED luminous cap shell |
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| Publication Number | Publication Date |
|---|---|
| CN116442508A true CN116442508A (en) | 2023-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310282146.9A Pending CN116442508A (en) | 2023-03-22 | 2023-03-22 | Processing method of plastic-suction formed LED luminous cap shell |
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| Country | Link |
|---|---|
| CN (1) | CN116442508A (en) |
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2023
- 2023-03-22 CN CN202310282146.9A patent/CN116442508A/en active Pending
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