A marking device for injection molded parts

Abstract

The invention discloses a marking device for injection molded parts, which comprises a laser lens bottom connected to a barrel cover; the dust collecting structure is installed on one side of the barrel cover, and the middle position of the ventilation pipe is fixedly connected to the barrel cover, and is arranged as a structure with large diameters at both ends and small diameters in the middle, one end of which is connected to a dust collector, and the other end is connected to a first bellows; when the dust collectors and the first bellows at both ends of the ventilation pipe are turned on, strong unidirectional wind is formed in the ventilation pipe, and the wind speed of the unidirectional wind increases when passing through the middle part with a small diameter; by utilizing the Venturi effect, a negative pressure is formed at the position where the middle part of the barrel cover is connected to the first connecting pipe; the pressure at the bottom of the laser lens is higher than that in the negative pressure area, and smoke cannot pass through, thereby protecting the laser lens; at the same time, the injection molded part and the barrel cover are not closed, and the pressure near the injection molded part is higher than that in the negative pressure area, and the high pressure flows toward the negative pressure, and the smoke near the injection molded part flows toward the negative pressure position, thereby preventing dust from floating to both sides and dust residue on the injection molded part, thereby achieving the purpose of collecting smoke.

Description

Technical Field

[0001] The present invention relates to the technical field of laser marking, and in particular to a marking device for injection molded parts. Background Art

[0002] Injection molding is a common preparation method, which specifically refers to placing granular or powdered plastic in the barrel of an injection machine and heating it to melt it, then applying pressure with a push rod or a rotating screw to inject the rubber in the barrel through the nozzle and the pouring system of the mold into the mold cavity for cooling and molding. Injection molded parts are plastic products prepared by the injection molding process, including various packages, parts, etc.; they are mainly made of materials such as polyethylene or polypropylene and added with a variety of organic solvents. After the injection molded parts are produced, due to their different shapes and thicknesses, punching and marking are not suitable for the marking of injection molded parts. In mechanized production, laser marking machines are generally required for marking to achieve tracking and control of parts; that is, by marking parts with QR codes, text or numbers, etc., the production date, batch and quality grade of the parts can be classified.

[0003] Laser marking is a common marking process that uses high-energy-density lasers to partially irradiate the workpiece, causing the surface material to vaporize or undergo a chemical reaction that changes color, leaving permanent text, symbols, patterns and other marks for anti-counterfeiting. The advantages of laser marking compared to other marking methods are: 1. Non-contact processing; 2. There is a large degree of freedom in the material, shape, size and processing environment of the processing object, which can be applied to automated processing and special surface processing; laser engraving is fine, and the lines can reach the millimeter to micron level; 3. The marks made by laser engraving technology are very difficult to imitate and change, which is extremely important for product anti-counterfeiting; 4. The combination of laser processing system and computer numerical control technology can form efficient automated processing equipment, which can print various texts, symbols and patterns, and is easy to design and engrave patterns with software. However, lasers also have disadvantages, one of which is that they are expensive, and so are the internal components; laser lenses, as an indispensable component for laser operation, have precision lenses attached to the bottom, and some precision laser lenses still need to be imported from abroad.

[0004] After searching, the application number is "CN202223223446.X", and the name is "A marking device for injection molded parts", which discloses a marking device for injection molded parts, a machine body, an air collecting frame and a suction fan. The air collecting frame is installed inside the machine body, and the suction fan is symmetrically installed on the upper end of the air collecting frame. The suction fan is connected to the air collecting frame through an air inlet pipe, and the air outlet pipe of the suction fan is threadedly connected to a filter frame. The utility model generates negative pressure in the collection chamber when the suction fan is running, and the smoke generated is sucked into the suction fan through the collection chamber through the air inlet holes on three sides, and then filtered and discharged through the activated carbon filter and the high-efficiency filter, which can avoid environmental pollution caused by harmful gases.

[0005] The above-mentioned marking device for injection molded parts achieves the goal of avoiding environmental pollution caused by harmful gases. However, in actual use, the marking device for injection molded parts adsorbs dust to both sides, and the dust will float to both sides, resulting in dust residue on the injection molded parts. At the same time, when the flue gas passes through the collection chamber to generate a negative pressure environment, the flue gas will rise, and part of the flue gas will adhere to the laser lens, which needs to be wiped and cleaned frequently. If you are not careful, it will cause damage to the laser lens and increase the cost.

[0006] In summary, there is an urgent need for a marking device for injection molded parts to solve the above problems. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides a marking device for injection molded parts, which solves the problem that the existing marking device for injection molded parts adsorbs dust to both sides, causing the dust to float to both sides, resulting in dust residue on the injection molded parts; at the same time, smoke rises during the marking process, and part of the smoke will adhere to the laser lens, requiring frequent wiping and cleaning, which may cause damage to the laser lens if not handled with care, thereby increasing costs.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a marking device for injection molded parts, comprising a housing, a base, a feeding structure, a marking structure and a dust collection structure;

[0009] The shell is fixedly installed above the base; support legs are arranged at the bottom of the base, and a support seat is arranged under the support legs; an anti-slip pad is arranged at the bottom of the support seat; a first groove with a top opening is arranged at the top of the base; a conveyor belt is arranged in the first groove.

[0010] The feeding structure is fixedly mounted on the base; the feeding mechanism includes a suction cup, a support frame, a cylinder and a telescopic rod; the support frame includes a support column, a top plate and a bottom plate, and support columns are provided at the four corners of the support frame, and the support columns can slide up and down in the base; the size of the top plate of the support frame is the same as the first groove above the base, and the top plate can be embedded in the base; the top plate of the support frame is placed inside the first groove; the bottom plate of the support frame is placed under the base; a cylinder is provided between the bottom plate and the base; when the cylinder is in a straight state, the top plate is embedded in the first groove; when the cylinder is in a compressed state, the support frame rises, and the top plate can rise to the inside of the outer shell;

[0011] The telescopic rod is arranged inside the top plate; the suction cup is fixedly installed on the upper end of the telescopic rod, penetrates up and down, and is arranged to be a structure with a large top and a small bottom; the telescopic rod is arranged to be an internal hollow structure, and the suction cup is connected to the external vacuum gas through the telescopic rod; the telescopic rod can be extended and retracted up and down, so that the suction cup can move up and down to adsorb the injection molded part; when there is no injection molded part above the top plate, the telescopic rod shrinks and the suction cup is embedded in the top plate; when the injection molded part is placed above the top plate, the telescopic rod is ejected and the suction cup adsorbs the injection molded part.

[0012] The marking structure includes a laser, a laser lens, a first support plate, a second support plate, an optical path and a barrel cover, wherein the laser is fixedly mounted on an inner wall of one side of the shell; the first support plate is fixedly mounted on the inner wall of the shell, and is arranged between the optical path and the laser lens; the optical path seal is placed above the first support plate, and is fixedly connected to the output end of the laser, and the other end of the optical path is fixedly connected to the laser lens; the barrel cover can be movably connected to the laser lens, and the other end is arranged corresponding to the feeding mechanism; the diameter of the barrel cover at one end away from the laser lens becomes larger, so that the feeding mechanism can extend into the bottom of the barrel cover; the second support plate is fixedly mounted on the inner wall of the shell to support the barrel cover.

[0013] The dust collection structure includes a ventilation pipe, a first connecting pipe, a dust collector and a first bellows. The ventilation pipe is arranged as a cylindrical structure with a large diameter at both ends and a small diameter in the middle, and is hollow inside. One of the two ends is connected to the dust collector, and the other end is connected to the first bellows. The first connecting pipe is fixedly installed in the middle position of the ventilation pipe, one end of which is fixedly connected to the middle position of the ventilation pipe, and the other end is fixedly connected to the middle position of the tube cover.

[0014] As a preferred solution of the marking device for injection molded parts described in the present invention, a second connecting pipe is arranged on the barrel cover at a position symmetrical to the first connecting pipe, and the second connecting pipe is connected to the second bellows and has the same diameter as the first connecting pipe.

[0015] As a preferred solution of the marking device for injection molded parts described in the present invention, the diameter of the first connecting pipe is the same as the diameter of the barrel cover.

[0016] As a preferred solution of the marking device for injection molded parts described in the present invention, the length of the barrel cover is the same as the focal length of the laser lens.

[0017] As a preferred solution of the marking device for injection molded parts described in the present invention, the laser is a green laser.

[0018] As a preferred solution of the marking device for injection molded parts described in the present invention, when the cylinder is in a compressed state, the support frame rises and the top plate can rise to the bottom of the cylinder cover.

[0019] As a preferred solution of the marking device for injection molded parts described in the present invention, the barrel cover uses acrylic plate as raw material and is in a transparent state, which can reduce the brightness of the laser.

[0020] As a preferred solution of the marking device for injection molded parts described in the present invention, a camera is arranged on the inner wall of the shell to monitor the marking position.

[0021] The design principle of the present invention is:

[0022] Since the laser is used for marking, after a single debugging of the laser lens, there is no need for secondary movement processing, and its position is fixed. The bottom of the laser lens is connected to the barrel cover and will not affect the normal marking work of the laser. The dust collection structure is installed on one side of the barrel cover, and the middle position of the ventilation pipe inside it is fixedly connected to the barrel cover, and is set to a structure with large diameters at both ends and small diameter in the middle. One of the two ends is connected to a dust collector, and the other end is connected to a first bellows. When the dust collectors and the first bellows at both ends of the ventilation pipe are turned on at the same time, a strong one-way Wind, the wind speed of the one-way wind increases when passing through the middle part with a small diameter; the Venturi effect is used to form a negative pressure at the position where the middle part of the barrel cover is connected to the ventilation pipe; the bottom of the laser lens is connected to a barrel cover, and its internal pressure is always higher than the negative pressure area, so that the smoke cannot pass through the negative pressure area to reach the laser lens position; at the same time, the feeding structure on one side of the injection molded part to be marked is not closed with the barrel cover, and it is connected to the external space, and the pressure is higher than the negative pressure area. The high-pressure area flows to the negative pressure area, forming a cycle, so that the smoke near the injection molded part flows to the negative pressure position, thereby achieving the purpose of collecting the smoke.

[0023] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0024] 1. The present invention shows a marking device for injection molded parts, which is connected to the barrel cover by setting the bottom of the laser lens; the dust collection structure is installed on one side of the barrel cover, and the middle position of the ventilation pipe inside it is fixedly connected to the barrel cover, and is set to a structure with large diameters at both ends and small diameters in the middle, one of the two ends is connected to a dust collector, and the other end is connected to a first bellows; when the dust collectors and the first bellows at both ends of the ventilation pipe are turned on at the same time, a strong one-way wind will be formed in the ventilation pipe, and the wind speed of the one-way wind will increase when passing through the middle part with a small diameter; the Venturi effect is used to make the middle part of the barrel cover connected to the ventilation pipe Negative pressure is formed at the connection position; a barrel cover is connected to the bottom of the laser lens, and its internal pressure is always higher than that of the negative pressure area, so that the smoke cannot pass through the negative pressure area and reach the laser lens position, without affecting the normal marking work of the laser, and avoiding the damage of the laser lens caused by the rising of smoke; at the same time, the feeding structure on one side of the injection molded part to be marked is not closed with the barrel cover, and it is connected to the external space. The pressure is higher than that of the negative pressure area, and the high-pressure area flows to the negative pressure area to form a cycle, so that the smoke near the injection molded part flows to the negative pressure position, avoiding the dust floating to both sides and the presence of dust residue on the injection molded part, thereby achieving the purpose of collecting smoke.

[0025] 2. The present invention shows a marking device for injection molded parts. A second connecting pipe is provided on the barrel cover at a position symmetrical to the first connecting pipe. The second connecting pipe is connected to a second bellows, and its diameter is the same as that of the first connecting pipe. The first connecting pipe is connected to the second connecting pipe, and the second bellows is opened, so that one-way wind is generated between the first connecting pipe and the second connecting pipe. A negative pressure state is formed at the position where the middle part of the barrel cover is connected to the ventilation pipe, so that smoke collection can be better achieved and smoke collection efficiency can be improved.

[0026] 3. The present invention shows a marking device for injection molded parts, which is provided with a transmission belt on the top of the base to transfer the injection molded parts to the top of the feeding structure; a cylinder is provided between the feeding structure and the base; when the cylinder is in a straight state, the top plate is embedded in the first groove; when the cylinder is in a compressed state, the support frame rises, and the top plate can rise to the bottom of the barrel cover; the telescopic rod inside the feeding structure is arranged inside the top plate; the suction cup is fixedly installed on the upper end of the telescopic rod, passing through it from top to bottom, and is arranged to be a structure with a large top and a small bottom The telescopic rod is configured as an internal hollow structure, and the suction cup is connected to the external vacuum gas through the telescopic rod; the telescopic rod can be extended and retracted up and down, so that the suction cup can move up and down to adsorb the injection molded part; when there is no injection molded part above the top plate, the telescopic rod is retracted and the suction cup is embedded in the top plate; when the injection molded part is placed above the top plate, the telescopic rod is ejected and the suction cup adsorbs the injection molded part; by adopting the above technical solution, the suction cup can stably adsorb the injection molded part, avoiding the influence of the upward unidirectional wind on the position of the injection molded part, so that the marking accuracy thereof is reduced.

[0027] 4. The present invention shows a marking device for injection molded parts, which is connected to a tube cover at the bottom of the laser lens. The tube cover uses an acrylic plate as a raw material and is transparent, which can reduce the brightness of the laser. The user can set a camera on the inner wall of the shell and monitor the marking position through the transparent tube cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional structural schematic diagram of a first embodiment of a marking device for injection molded parts according to the present invention;

[0029] Figure 2 It is a front view structural schematic diagram of a first embodiment of a marking device for injection molded parts according to the present invention;

[0030] Figure 3 for Figure 2 The cross-sectional structure of Figure 1 ;

[0031] Figure 4 for Figure 2 The cross-sectional structure of Figure 2 ;

[0032] Figure 5 It is a three-dimensional structural schematic diagram of a second embodiment of a marking device for injection molded parts according to the present invention;

[0033] Figure 6 for Figure 5 The cross-sectional structure of Figure 1 .

[0034] In the figure: 1. outer shell; 2. base; 3. first groove; 4. supporting leg; 5. supporting seat; 6. ventilation pipe; 7. first bellows; 8. vacuum cleaner; 9. first connecting pipe; 10. cylinder; 11. supporting frame; 12. top plate; 13. suction cup; 14. bottom of tube cover; 15. laser; 16. optical path; 17. laser lens; 18. tube cover; 19. first supporting plate; 20. second supporting plate; 21. second connecting pipe; 22. second bellows; 23. supporting column; 24. bottom plate. DETAILED DESCRIPTION

[0035] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0036] Embodiment 1:

[0037] A marking device for injection molded parts, using a green laser 15, such as Figure 1-Figure 4 , including a shell 1, a base 2, a feeding structure, a marking structure and a dust collection structure;

[0038] like Figure 1 As shown, the shell 1 is fixedly installed above the base 2; a support leg 4 is provided at the bottom of the base 2, and a support seat 5 is provided below the support leg 4; an anti-slip pad is provided at the bottom of the support seat 5; a first groove 3 with a top opening is provided at the top of the base 2; and a conveyor belt is provided in the first groove 3.

[0039] like Figure 3 As shown, the feeding structure is fixedly installed on the base 2; the feeding mechanism includes a suction cup 13, a support frame 11, a cylinder 10 and a telescopic rod; the support frame 11 includes a support column 23, a top plate 12 and a bottom plate 24, and the support frame 11 is provided with support columns 23 at the four corners, and the support columns 23 can slide up and down in the base 2; the size of the top plate 12 of the support frame 11 is the same as the first groove 3 above the base 2, and the top plate 12 can be embedded in the base 2; the top plate 12 of the support frame 11 is placed inside the first groove 3; the bottom plate 24 of the support frame 11 is placed under the base 2; a cylinder 10 is provided between the bottom plate 24 and the base 2; when the cylinder 10 is in a straight state, the top plate 12 is embedded in the first groove 3; when the cylinder 10 is in a compressed state, the support frame 11 rises, and the top plate 12 can rise to the bottom 14 of the barrel cover;

[0040] The telescopic rod is arranged inside the top plate 12; the suction cup 13 is fixedly installed on the upper end of the telescopic rod, penetrates up and down, and is arranged to be a structure with a large top and a small bottom. The telescopic rod is arranged to have an internal hollow structure, and the suction cup 13 is connected to the external vacuum gas through the telescopic rod; the telescopic rod can be extended and retracted up and down, so that the suction cup 13 can move up and down to adsorb the injection molded parts; when there is no injection molded part above the top plate 12, the telescopic rod shrinks and the suction cup 13 is embedded in the top plate 12; when the injection molded part is placed above the top plate 12, the telescopic rod is ejected and the suction cup 13 adsorbs the injection molded part; to avoid the influence of the upward unidirectional wind on the position of the injection molded part, so as to reduce the marking accuracy of the injection molded part.

[0041] like Figure 3-Figure 4As shown, the marking structure includes a laser 15, a laser lens 17, a first support plate 19, a second support plate 20, an optical path 16 and a barrel cover 18, wherein the laser 15 is fixedly mounted on an inner wall of one side of the housing 1; the first support plate 19 is fixedly mounted on the inner wall of the housing 1, and is arranged between the optical path 16 and the laser lens 17; the optical path 16 is sealed and placed above the first support plate 19, which is fixedly connected to the output end of the laser 15, and the other end of the optical path 16 is fixedly connected to the laser lens 17; the barrel cover 18 is movably connected to the laser lens 17, and the other end is arranged corresponding to the feeding mechanism; the diameter of the barrel cover 18 at one end away from the laser lens 17 becomes larger, so that the feeding mechanism can extend into the bottom 14 of the barrel cover; the second support plate 20 is fixedly mounted on the inner wall of the housing 1 to support the barrel cover 18.

[0042] like Figure 1 As shown, the dust collection structure includes a ventilation pipe 6, a first connecting pipe 9, a dust collector 8 and a first bellows 7. The ventilation pipe 6 is configured as a cylindrical structure with large diameters at both ends and a small diameter in the middle, and is hollow inside; one of the two ends is connected to the dust collector 8, and the other end is connected to the first bellows 7; when the dust collectors 8 and the first bellows 7 at both ends of the ventilation pipe 6 are turned on at the same time, a strong unidirectional wind will be formed in the ventilation pipe 6, and the wind speed of the unidirectional wind will increase when passing through the middle part with a small diameter; the Venturi effect is used to form a negative pressure at the position where the middle part of the tube cover 18 is connected to the ventilation pipe 6; the first connecting pipe 9 is fixedly mounted on the ventilation pipe 6 The middle position of the laser lens 17 has a diameter the same as that of the barrel cover 18; one end of the first connecting pipe 9 is fixedly connected to the middle position of the ventilation pipe 6, and the other end is fixedly connected to the middle position of the barrel cover 18; the bottom of the laser lens 17 is connected to the barrel cover 18, and its internal pressure is always higher than that of the negative pressure area, so that the smoke cannot pass through the negative pressure area to reach the laser lens 17 position; at the same time, the feeding structure on one side of the injection molded part to be marked is not closed with the barrel cover 18, which is connected to the external space, and the pressure is higher than that of the negative pressure area. The high-pressure area flows to the negative pressure area to form a cycle, so that the smoke near the injection molded part flows to the negative pressure position, thereby achieving the purpose of collecting the smoke.

[0043] As a preferred solution of the marking device for injection molded parts described in the present invention, the length of the barrel cover 18 is the same as the focal length of the laser lens 17, so that the laser can mark the injection molded parts accurately.

[0044] Embodiment 2:

[0045] A marking device for injection molded parts, such as Figure 5-Figure 6As shown, what is different from Example 1 is that, on the basis of Example 1, a second connecting pipe 21 is provided on the barrel cover 18 at a position symmetrical to the first connecting pipe 9, and the second connecting pipe 21 is connected to the second bellows 22, and its diameter is the same as that of the first connecting pipe 9; so that the first connecting pipe 9 is connected to the second connecting pipe 21, the second bellows 22 is opened, and one-way wind is generated between the first connecting pipe 9 and the second connecting pipe 21; in conjunction with the position where the middle part of the barrel cover 18 is connected to the ventilation pipe 6 to form a negative pressure state, the smoke collection can be better realized and the smoke collection efficiency is improved.

[0046] Embodiment three:

[0047] A marking device for injection molded parts, which is different from Example 1 in that, based on Example 1, the barrel cover 18 uses acrylic plate as raw material and is transparent, which can reduce the laser brightness; a camera is provided on the inner wall of the shell 1 to monitor the marking position in real time to ensure the marking effect.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A marking device for injection molded parts, comprising a housing (1), a base (2), a feeding structure, a marking structure and a dust collection structure; It is characterized in that The housing (1) is fixedly mounted above the base (2); a first groove (3) with a top opening is provided on the top of the base (2); a conveyor belt is provided in the first groove (3); the marking structure comprises a laser lens (17) and a barrel cover (18); the barrel cover (18) is movably connected to the laser lens (17), and the other end of the barrel cover (18) is provided corresponding to the feeding structure; The dust collection structure comprises a ventilation pipe (6), a first connecting pipe (9), a dust collector (8) and a first bellows (7); the ventilation pipe (6) is configured as a cylindrical structure with large diameters at both ends and a small diameter in the middle, and is hollow inside; one of the two ends is connected to the dust collector (8), and the other end is connected to the first bellows (7); the first connecting pipe (9) is fixedly mounted at the middle position of the ventilation pipe (6), and its diameter is the same as the diameter of the barrel cover (18); one end of the first connecting pipe (9) is fixedly connected to the middle position of the ventilation pipe (6), and the other end is fixedly connected to the middle position of the barrel cover (18); A second connecting pipe (21) is provided on the barrel cover (18) at a position symmetrical to the first connecting pipe (9), the second connecting pipe (21) is connected to a second bellows (22), and the diameter of the second connecting pipe (21) is the same as that of the first connecting pipe (9).

2. A marking device for injection molded parts according to claim 1, characterized in that: The feeding structure comprises a suction cup (13), a support frame (11), a cylinder (10) and a telescopic rod; the support frame (11) comprises a support column (23), a top plate (12) and a bottom plate (24); the support frame (11) is provided with support columns (23) at four corners, and the support columns (23) can slide up and down in the base (2); the size of the top plate (12) of the support frame (11) is the same as the first groove (3) above the base (2), and the top plate (12) can be embedded in the first groove (3) above the base (2). The base (2) is provided with a top plate (12) of the support frame (11) disposed inside the first groove (3); the bottom plate (24) of the support frame (11) is disposed below the base (2); a cylinder (10) is provided between the bottom plate (24) and the base (2); when the cylinder (10) is in an extended state, the top plate (12) is embedded in the first groove (3); when the cylinder (10) is in a compressed state, the support frame (11) rises, and the top plate (12) can rise to the bottom (14) of the cylinder cover.

3. A marking device for injection molded parts according to claim 2, characterized in that: The telescopic rod is arranged inside the top plate (12); the suction cup (13) is fixedly mounted on the upper end of the telescopic rod, penetrates vertically, and is arranged to be a structure with a large top and a small bottom; the telescopic rod is arranged to be an internal hollow structure, and the suction cup (13) is connected to external vacuum gas through the telescopic rod; the telescopic rod can be extended and retracted up and down, so that the suction cup (13) can move up and down to adsorb the injection molded part; when there is no injection molded part above the top plate (12), the telescopic rod is retracted, and the suction cup (13) is embedded in the top plate (12); when the injection molded part is placed above the top plate (12), the telescopic rod is pushed out, and the suction cup (13) adsorbs the injection molded part.

4. A marking device for injection molded parts according to claim 1, characterized in that: The barrel cover (18) is provided with a barrel cover bottom (14) away from the laser lens (17), and the diameter of the barrel cover bottom (14) is greater than the diameter of the barrel cover (18).

5. A marking device for injection molded parts according to claim 1, characterized in that: The marking structure further comprises a laser (15) optical path (16), a first support plate (19) and a second support plate (20); the laser (15) is fixedly mounted on an inner wall of one side of the housing (1); the optical path (16) is sealed and placed above the first support plate (19), which is fixedly connected to an output end of the laser (15); the other end of the optical path (16) is fixedly connected to the laser lens (17); the first support plate (19) is fixedly mounted on the inner wall of the housing (1) and is arranged between the optical path (16) and the laser lens (17); the second support plate (20) is fixedly mounted on the inner wall of the housing (1) to support the barrel cover (18).

6. A marking device for injection molded parts according to claim 1, characterized in that: The length of the barrel cover (18) is the same as the focal length of the laser lens (17).

7. A marking device for injection molded parts according to claim 6, characterized in that: The tube cover (18) uses an acrylic plate as a raw material and is in a transparent state.

8. A marking device for injection molded parts according to claim 7, characterized in that: A camera is arranged on the inner wall of the shell to monitor the marking position.

9. A marking device for injection molded parts according to claim 1, characterized in that: A support leg (4) is provided at the bottom of the base (2), and a support seat (5) is provided below the support leg (4); an anti-slip pad is provided at the bottom of the support seat (5).

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