An inkjet printer for printing on the surface of a cylindrical product and a method of use

Abstract

The application provides a code jetting machine for jetting on the surface of a cylindrical product and a use method, the code jetting machine comprises an upper frame, a reciprocating code jetting head is arranged on the upper frame, a rotary drive module and a product positioning mechanism are further arranged on the upper frame, the rotary drive module comprises a transmission rod driven by a rotary motor, a pressing wheel is arranged at both ends of the transmission rod, the product positioning mechanism comprises a rear end positioning block and a front end positioning cylinder, the rear end positioning block and the front end positioning cylinder are respectively located at both ends of the transmission rod, a lower frame is arranged below the transmission rod, a plurality of jacking assemblies are arranged on the lower frame, and the jacking assembly comprises a jacking cylinder, a supporting spring group and a driven wheel group which are sequentially connected from bottom to top. The application can realize line changing and rotary jetting on the surface of a cylindrical product, improves the efficiency and precision of code jetting, is suitable for cylindrical products with different diameters and lengths, has the advantages of simple structure, convenient operation, low cost, safety and reliability.

Description

Technical Field

[0001] This invention relates to the field of inkjet printer technology, and in particular to an inkjet printer for printing on the surface of cylindrical products and its usage method. Background Technology

[0002] Currently, there are two main types of inkjet printers on the market: fixed and mobile. Fixed inkjet printers have the printhead fixed in one position, and the product is moved below the printhead via a conveyor belt or other means for printing. Mobile inkjet printers have the printhead mounted on a movable robotic arm or slide, moving along the product surface for printing. Both types have limitations. For example, fixed inkjet printers cannot perform line breaks or rotation printing on the product surface, while mobile inkjet printers require higher precision and stability; otherwise, unclear or misaligned printing can easily occur. Therefore, existing technologies still need improvement to meet the demand for barcode or QR code printing on cylindrical product surfaces. Summary of the Invention

[0003] This invention proposes an inkjet printer and its usage method for printing on the surface of cylindrical products. It can perform line-by-line and rotation printing on the surface of cylindrical products, improving the efficiency and accuracy of inkjet printing. It is suitable for cylindrical products of different diameters and lengths, and has a simple structure, is easy to operate, has low cost, and is safe and reliable.

[0004] The technical solution of the present invention is implemented as follows: A coding machine for printing on the surface of cylindrical products includes an upper frame, on which a reciprocating inkjet head is provided. The upper frame is also provided with a rotary drive module and a product positioning mechanism. The rotary drive module includes a transmission rod driven by a rotary motor. Both ends of the transmission rod are provided with pressure wheels. The product positioning mechanism includes a rear positioning block and a front positioning cylinder. The rear positioning block and the front positioning cylinder are respectively located at both ends of the transmission rod. A lower frame is provided below the transmission rod. Several lifting components are provided on the lower frame. The lifting components include a lifting cylinder, a support spring group, and a driven wheel group connected in sequence from bottom to top.

[0005] Furthermore, a support is rotatably connected to one end of the transmission rod near the front positioning cylinder. The support is slidably mounted on the first linear guide rail. The front positioning cylinder is connected to the front mounting seat. The front mounting seat is slidably mounted on the second linear guide rail. Both the first and second linear guide rails are fixed to the upper frame. The front mounting seat and the support are connected by a connecting rod, and a positioning pin is screwed onto the connecting rod.

[0006] Furthermore, the rotary motor is fixed on the upper frame, and a second synchronous pulley is fixed to the output end of the rotary motor. A first synchronous pulley is fixed to the end of the transmission rod near the rear positioning block. The second synchronous pulley and the first synchronous pulley are driven by a synchronous belt.

[0007] Furthermore, a servo motor-driven lead screw is installed on the upper frame, and the spray nozzle is connected to the lead screw via a slide.

[0008] Furthermore, the rear positioning block is connected to the rear mounting base, which is slidably mounted on the third linear guide rail. The third linear guide rail is fixed to the upper frame, and a locking screw is screwed onto the rear mounting base.

[0009] Furthermore, the lifting assembly also includes a guide rod assembly mounted on the lower frame, with the upper end of the guide rod assembly connected to the support spring assembly.

[0010] Furthermore, the lower ends of both the upper and lower frames are connected to the base plates.

[0011] A method of using an inkjet printer for printing on the surface of cylindrical products includes the following steps:

[0012] (1) Place the cylindrical product on the driven wheel assembly, extend the lifting cylinder, and cause the driven wheel assembly to drive the cylindrical product to rise and contact the pressing wheel, thereby pressing the cylindrical product.

[0013] (2) The front positioning cylinder extends and contacts the front end of the cylindrical product, then pushes the cylindrical product to move backward and contacts the rear positioning block, thereby positioning the rear end of the cylindrical product. After positioning is completed, the front positioning cylinder retracts and releases the front end of the cylindrical product.

[0014] (3) The rotary motor drives the transmission rod to rotate, the transmission rod drives the pressure wheel to rotate, and the pressure wheel drives the cylindrical product to rotate; then the spray gun moves to spray print on the surface of the cylindrical product;

[0015] (4) After printing is completed, the inkjet head is reset and the rotating motor is stopped; the lifting cylinder retracts, driving the cylindrical product to move down and remove the cylindrical product from the driven wheel set.

[0016] The beneficial effects of this invention are:

[0017] 1. This invention enables the printing of barcodes or text on the surface of cylindrical products by line breaks and rotation, improving the efficiency and accuracy of printing. It is applicable to cylindrical products of different diameters and lengths, thus expanding the scope of application of printing.

[0018] 2. The invention has a simple structure, is easy to manufacture and install, and reduces costs and maintenance difficulty. The invention is easy to operate. Simply place the cylindrical product on the driven wheel assembly and start the corresponding cylinder and motor to automatically complete the coding process without manual intervention, reducing manpower and time consumption and improving safety and reliability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of the present invention;

[0021] Figure 2 for Figure 1 The main view;

[0022] Figure 3 This is a schematic diagram of the rear structure of the upper frame;

[0023] Figure 4 This is a schematic diagram of the front end of the superstructure;

[0024] Figure 5 for Figure 1 The left view;

[0025] Figure 6 for Figure 1 Top view.

[0026] Upper frame 1, servo motor 2, transmission lead screw 3, spraying terminal 4, rotary motor 5, transmission rod 6, pressure wheel 7, first synchronous pulley 8, second synchronous pulley 9, synchronous belt 10, rear positioning block 11, front positioning cylinder 12, lower frame 13, foot plate 14, lifting cylinder 15, support spring assembly 16, driven wheel assembly 17, guide rod assembly 18, support 19, first linear guide rail 20, front mounting seat 21, second linear guide rail 22, connecting rod 23, positioning pin 24, connecting seat 25, rear mounting seat 26, third linear guide rail 27. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1

[0029] like Figure 1-2As shown in Figures 5-6, a coding machine for printing on the surface of cylindrical products includes an upper frame 1. A transmission screw 3 driven by a servo motor 2 is mounted on the upper frame 1. A print head 4 is connected to the transmission screw 3 via a slide. The servo motor 2 drives the transmission screw 3 to rotate, thereby causing the print head 4 to reciprocate. The position and moving speed of the print head 4 are adjusted to adapt to cylindrical products of different lengths and different coding requirements.

[0030] The upper frame 1 is also equipped with a rotary drive module, which includes a transmission rod 6 driven by a rotary motor 5. Both ends of the transmission rod 6 are fixed with pressure wheels 7. There are two transmission rods 6, and each transmission rod 6 has a first synchronous pulley 8 fixed to its rear end. The output end of the rotary motor 5 is fixed with a second synchronous pulley 9 corresponding to each transmission rod 6. The second synchronous pulley 9 and the corresponding first synchronous pulley 8 are connected by a synchronous belt 10. The rotary motor 5 drives the transmission rod 6 to rotate, which in turn drives the pressure wheels 7 to rotate. By adjusting the rotation speed of the pressure wheels 7, different coding requirements can be met.

[0031] The upper frame 1 is also equipped with a product positioning mechanism, which includes a rear positioning block 11 and a front positioning cylinder 12. The rear positioning block 11 is located at the rear end of the transmission rod 6, and the front positioning cylinder 12 is located at the front end of the transmission rod 6. Through the cooperation of the rear positioning block 11 and the front positioning cylinder 12, the front and rear ends of the cylindrical product are positioned.

[0032] A lower frame 13 is located below the transmission rod 6. The lower ends of both the upper frame 1 and the lower frame 13 are bolted to a base plate 14, which fixes their relative positions. Several lifting assemblies are mounted on the lower frame 13, including a lifting cylinder 15, a support spring assembly 16, and a driven wheel assembly 17 connected sequentially from bottom to top. The lifting cylinder 15 is vertically fixed to the lower frame 13, with its upper end fixedly connected to the support spring assembly 16, and the upper end of the support spring assembly 16 fixedly connected to the driven wheel assembly 17. The extension and retraction of the lifting cylinder 15 drives the driven wheel assembly 17 to move vertically, adapting to cylindrical products of different diameters. The cooperation between the pressure wheel 7 and the driven wheel assembly 17 supports and drives the rotation of the cylindrical product. The lifting assembly also includes a guide rod assembly 18 mounted on the lower frame 13. The upper end of the guide rod assembly 18 is connected to the support spring assembly 16, and the vertical movement of the driven wheel assembly 17 is guided by the guide rod assembly 18.

[0033] The method of using the inkjet printer includes the following steps:

[0034] (1) Place the cylindrical product on the driven wheel assembly 17, extend the lifting cylinder 15, and drive the driven wheel assembly 17 to lift the cylindrical product, so that the cylindrical product comes into contact with the pressing wheel 7, thereby pressing the cylindrical product.

[0035] (2) The front positioning cylinder 12 extends and contacts the front end of the cylindrical product, then pushes the cylindrical product to move backward and contacts the rear positioning block 11, thereby positioning the rear end of the cylindrical product. After positioning is completed, the front positioning cylinder 12 retracts and releases the front end of the cylindrical product.

[0036] (3) The rotary motor 5 drives the transmission rod 6 to rotate, the transmission rod 6 drives the pressure wheel 7 to rotate, and the pressure wheel 7 drives the cylindrical product to rotate; then the spraying dock 4 moves to spray print on the surface of the cylindrical product.

[0037] (4) After printing, the inkjet head 4 is reset and the rotating motor 5 stops; the lifting cylinder 15 retracts, driving the cylindrical product to move down and remove the cylindrical product from the driven wheel group 17.

[0038] Example 2

[0039] This embodiment is basically the same as Embodiment 1, except that: Figure 2-4 As shown, a support 19 is rotatably connected to one end of the transmission rod 6 near the front positioning cylinder 12. The support 19 is slidably mounted on the first linear guide rail 20. The front positioning cylinder 12 is fixedly connected to the front mounting seat 21, which is slidably mounted on the second linear guide rail 22. Both the first and second linear guide rails 20 and 22 are fixed to the upper frame 1. The front mounting seat 21 and the support 19 are connected by a connecting rod 23, on which a positioning pin 24 is screwed. Different lengths of transmission rods 6 can be replaced, and the positions of the pressure roller 7 and the front mounting seat 21 can be adjusted to accommodate cylindrical products of different lengths. When adjusting the positions of the pressure roller 7 and the front positioning cylinder 12, loosen the positioning pin 24, then move the connecting rod 23 to move the support 19 along the first linear guide rail 20 and the front mounting seat 21 along the second linear guide rail 22. Finally, tighten the positioning pin 24.

[0040] The end of the transmission rod 6 near the rear positioning block 11 is rotatably connected to a connecting seat 25, which connects it to the upper frame 1. The rear positioning block 11 is connected to the rear mounting seat 26, which is slidably mounted on the third linear guide 27. The third linear guide 27 is fixed to the upper frame 1, and a locking screw is screwed onto the rear mounting seat 26. When the position of the rear positioning block 11 needs to be adjusted, loosen the locking screw, then move the rear mounting seat 26 along the third linear guide 27, and finally tighten the locking screw to fix the rear mounting seat 26.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coding machine for printing on the surface of cylindrical products, comprising an upper frame, characterized in that: The upper frame is equipped with a reciprocating spray nozzle, a rotary drive module and a product positioning mechanism. The rotary drive module includes a transmission rod driven by a rotary motor, with pressure wheels at both ends of the transmission rod. The product positioning mechanism includes a rear positioning block and a front positioning cylinder, which are located at the two ends of the transmission rod. The lower frame is located below the transmission rod, and several lifting components are installed on the lower frame. The lifting components include a lifting cylinder, a support spring assembly and a driven wheel assembly connected in sequence from bottom to top. The transmission rod is rotatably connected to a support at one end near the front positioning cylinder. The support is slidably mounted on the first linear guide rail. The front positioning cylinder is connected to the front mounting seat. The front mounting seat is slidably mounted on the second linear guide rail. Both the first and second linear guide rails are fixed on the upper frame. The front mounting seat and the support are connected by a connecting rod, and a positioning pin is screwed onto the connecting rod. The rear positioning block is connected to the rear mounting base, which is slidably mounted on the third linear guide rail. The third linear guide rail is fixed on the upper frame, and a locking screw is screwed onto the rear mounting base. The method of using the inkjet printer includes the following steps: (1) Place the cylindrical product on the driven wheel assembly, extend the lifting cylinder, and cause the driven wheel assembly to drive the cylindrical product to rise and contact the pressing wheel, thereby pressing the cylindrical product. (2) The front positioning cylinder extends and contacts the front end of the cylindrical product, then pushes the cylindrical product to move backward and contacts the rear positioning block, thereby positioning the rear end of the cylindrical product. After positioning is completed, the front positioning cylinder retracts and releases the front end of the cylindrical product. (3) The rotary motor drives the transmission rod to rotate, the transmission rod drives the pressure wheel to rotate, and the pressure wheel drives the cylindrical product to rotate; then the spray gun moves to spray print on the surface of the cylindrical product; (4) After printing is completed, the inkjet head is reset and the rotating motor is stopped; the lifting cylinder retracts, driving the cylindrical product to move down and remove the cylindrical product from the driven wheel set.

2. The inkjet printer for printing on the surface of cylindrical products according to claim 1, characterized in that: The rotary motor is fixed on the upper frame. The output end of the rotary motor is fixed with a second synchronous pulley. The end of the transmission rod near the rear positioning block is fixed with a first synchronous pulley. The second synchronous pulley and the first synchronous pulley are driven by a synchronous belt.

3. The inkjet printer for printing on the surface of cylindrical products according to claim 1, characterized in that: The upper frame is equipped with a transmission screw driven by a servo motor, and the spray nozzle is connected to the transmission screw via a slide.

4. The inkjet printer for printing on the surface of cylindrical products according to claim 1, characterized in that: The lifting assembly also includes a guide rod assembly mounted on the lower frame, with the upper end of the guide rod assembly connected to the support spring assembly.

5. A coding machine for printing on the surface of cylindrical products according to claim 1, characterized in that: The lower ends of both the upper and lower frames are connected to the base plates.

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