Screen printing machine with positioning structure

Abstract

The utility model relates to a silk screen printing machine with positioning structure belongs to cell phone shell production equipment technical field, a silk screen printing machine with positioning structure, including frame, its top is through servo motor, screw drive positioning seat sliding, positioning seat mould base diagonal first air cylinder and elastic positioning block are equipped, cooperate positioning wheel, scroll spring realizes cell phone shell accurate buffering positioning, the one side of frame is equipped with silk screen printing assembly, and the stable lifting of lift seat and silk screen printing screen plate is driven through light pole, air cylinder, and silk screen printing plate can accurate pressure and position adjustment. The device realizes positioning, removes, silk screen printing integration linkage, and positioning is accurate, and silk screen printing is stable, and operation is convenient, and is suitable for different size cell phone shell batch silk screen printing demand, and the rate of defective products and production cost are reduced obviously.

Description

Technical Field

[0001] This utility model belongs to the technical field of mobile phone case production equipment, specifically relating to a screen printing machine with a positioning structure. Background Technology

[0002] Screen printing machines are the core equipment in the production of mobile phone cases, enabling the printing of patterns and logos. Especially with the increasing demand for personalized and diversified smartphone cases, they must meet multiple requirements, including high-precision positioning, stable screen printing, efficient mass production, and compatibility with multiple models. Mobile phone case back panels (especially those made of glass or plastic) are thin, easily deformable, and have sensitive surface coatings, placing stringent demands on the positioning accuracy, clamping methods, and transmission stability of screen printing equipment. However, existing screen printing equipment, limited by its structural design, suffers from numerous technical shortcomings in actual production, making it difficult to meet the high-quality demands of modern mass production of mobile phone cases.

[0003] The positioning structure of existing screen printing equipment has obvious shortcomings: most of them use rigid clamping positioning on one or both sides, which easily leads to uneven force and deformation of the back panel of the mobile phone case, resulting in high positioning deviation and directly causing screen printing misalignment; lack of buffer structure, it is easy to scratch the surface coating of the mobile phone case when clamping; poor adaptability of the positioning mechanism, unable to be compatible with back panels of mobile phone cases of different sizes and curvatures, requiring frequent replacement of positioning molds, which is time-consuming and labor-intensive. Utility Model Content

[0004] The purpose of this utility model is to provide a screen printing machine with a simple structure and reasonable design that has a positioning structure in order to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A screen printing machine with a positioning structure includes an adjustment assembly. The adjustment assembly includes a frame. A screen printing assembly is fixedly installed on one side of the frame. A mobile phone case positioning assembly is slidably connected to the top of the frame. The mobile phone case positioning assembly includes a positioning seat slidably connected to the top of the frame. A plurality of mold seats are fixedly installed on the top of the positioning seat. At least two sets of first cylinders for positioning and limiting the back panel of the mobile phone case on the mold seat are arranged at diagonal positions of the mold seats. A positioning block is fixedly connected to the output end of each first cylinder.

[0007] Each of the positioning blocks has two rotating rods rotatably passing through its top. An eccentric plate located above the corresponding positioning block is fixedly sleeved on the outer wall of each rotating rod. A positioning wheel is rotatably connected to the bottom of each eccentric plate. A spiral spring fixedly installed on the inner wall of the corresponding positioning block is fixedly sleeved on the outer wall of each rotating rod.

[0008] As a further optimization of this utility model, a sliding groove is provided on the top of the frame, a lead screw is rotatably connected to the inner side wall of the sliding groove, a slider is threadedly sleeved on the outer side wall of the lead screw and slidably connected in the sliding groove, a mounting slide is fixedly connected to the top of the slider, and the positioning seat is fixedly installed on the top of the mounting slide.

[0009] As a further optimization of this utility model, limiting seats are fixedly installed on both sides of the top of the frame. Limiting grooves are respectively opened on the top and sides of the two limiting seats. The two ends of the mounting slide are slidably connected to the inner sidewall of the corresponding limiting groove. Sliding rods are fixedly installed on the inner sidewall of the two limiting grooves. The two ends of the mounting slide are slidably sleeved on the outer sidewall of the corresponding sliding rod.

[0010] As a further optimization of this utility model, a servo motor for driving the lead screw rotation is fixedly installed on the front side wall of the frame.

[0011] As a further optimization of this utility model, the screen printing assembly includes four optical rods fixedly installed on the top of the frame. A top plate is fixedly installed on the top of the four optical rods. A third cylinder is fixedly installed on the top of the top plate. A lifting seat that is slidably sleeved on the outer wall of the four optical rods is fixedly installed at the output end of the third cylinder. Sliding sleeves that are slidably sleeved on the outer wall of the corresponding optical rod are fixedly installed at the four bottom corners of the lifting seat.

[0012] As a further optimization of this utility model, a second cylinder is fixedly installed on the top of the lifting seat, a connecting plate is connected to the output end of the second cylinder, a buffer plate is fixedly installed on the front side wall of the light rod, an installation block is installed at the bottom of the buffer plate, and a screen printing plate is installed at the bottom of the installation block.

[0013] As a further optimization of this utility model, a screen printing plate that cooperates with the screen printing component and the mobile phone case positioning component is fixedly installed at the bottom of the lifting seat.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. In this utility model, the first cylinders diagonally positioned on the mold base drive the positioning blocks to clamp synchronously. This, combined with the positioning wheel, allows for flexible contact with the back panel of the phone case, avoiding deformation caused by rigid compression. The rotating rod, eccentric plate, and spiral spring form an elastic buffer mechanism. When the positioning wheel contacts the phone case, it can adaptively adjust the angle. The spiral spring provides uniform clamping force, ensuring firm positioning while preventing surface scratches and reducing the defect rate. The structural design of the positioning wheel and eccentric plate can adapt to phone case back panels of different curvatures and sizes, eliminating the need to replace positioning components and significantly improving adaptability, thus reducing mold changeover time.

[0016] 2. In this utility model, the third cylinder drives the lifting seat to rise and fall along the guide rod. The sliding fit between the sliding sleeve and the guide rod ensures smooth lifting and falling. The buffer plate and elastic structure absorb the impact force and avoid damage from hard contact. Secondly, the second cylinder drives the screen printing plate to move, which can accurately adjust the printing pressure and stroke to adapt to the back panel of mobile phone cases of different thicknesses and the characteristics of the paste, ensuring clear patterns and uniform paste adhesion. Thirdly, while the lifting seat and the screen printing plate are rigidly connected, the buffer structure reduces vibration. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This utility model Figure 1 A partial structural diagram;

[0019] Figure 3 This utility model Figure 1 A schematic diagram of the rear view structure;

[0020] Figure 4 This is a schematic diagram of the axonometric structure of the mobile phone case positioning component in this utility model;

[0021] Figure 5 This is a schematic diagram of the positioning block in this utility model.

[0022] In the diagram: 1. Adjustment component; 101. Frame; 102. Lead screw; 103. Servo motor; 104. Limit seat; 105. Slider; 106. Mounting slide; 107. Limit groove; 108. Slide rod; 2. Mobile phone case positioning component; 201. Positioning seat; 202. Mold base; 203. First cylinder; 2031. Positioning block; 2032. Rotating rod; 2033. Eccentric plate; 2034. Positioning wheel; 2035. Scroll spring; 3. Screen printing component; 301. Smooth rod; 302. Sliding sleeve; 303. Lifting seat; 304. Second cylinder; 305. Top plate; 306. Third cylinder; 307. Buffer plate; 308. Mounting block; 309. Screen printing plate; 310. Connecting plate; 4. Screen printing stencil. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0024] Example 1: As Figure 1 and Figure 3As shown, a screen printing machine with a positioning structure includes an adjustment component 1, a mobile phone case positioning component 2, a screen printing component 3, and a screen printing stencil 4. The adjustment component 1 serves as the basis for overall load-bearing and movement adjustment. The mobile phone case positioning component 2 achieves precise positioning and limiting of the back panel of the mobile phone case. The screen printing component 3 provides power and guidance for the screen printing action. The screen printing stencil 4 completes pattern transfer, forming a complete "positioning-movement-screen printing" operation system.

[0025] like Figure 1 and Figure 2 As shown, the adjustment assembly 1 includes a frame 101. A slide groove is provided on the top of the frame 101. A lead screw 102 is rotatably connected to the inner wall of the slide groove. A servo motor 103 for driving the lead screw 102 to rotate is fixedly installed on the front wall of the frame 101. A slider 105 is threadedly sleeved on the outer wall of the lead screw 102 and slidably connected in the slide groove. A mounting slide 106 is fixedly connected to the top of the slider 105. Limit seats 104 are fixedly installed on both sides of the top of the frame 101. Limit grooves 107 are respectively provided on the top and sides of the two limit seats 104. The two ends of the mounting slide 106 are slidably connected to the inner wall of the corresponding limit groove 107. A slide rod 108 is fixedly installed on the inner wall of the two limit grooves 107. The two ends of the mounting slide 106 are slidably sleeved on the outer wall of the corresponding slide rod 108 to realize the directional sliding guidance of the mounting slide 106.

[0026] like Figure 4 and Figure 5 As shown, the mobile phone case positioning assembly 2 includes a positioning seat 201, which is fixedly installed on the top of the mounting slide 106 and slidably connected to the frame 101 via the mounting slide 106. Several mold bases 202 are fixedly installed on the top of the positioning seat 201. At least two sets of first cylinders 203 are arranged diagonally on the mold bases 202 for positioning and limiting the back panel of the mobile phone case on the mold bases 202. A positioning block 2031 is fixedly connected to the output end of each first cylinder 203. Two rotating rods 2032 rotatably pass through the top of each positioning block 2031. An eccentric plate 2032 is fixedly sleeved on the outer wall of each rotating rod 2032 above the corresponding positioning block 2031. 33. The bottom of the eccentric plate 2033 is rotatably connected to a positioning wheel 2034 for positioning and limiting the back panel of the mobile phone; the outer wall of each rotating rod 2032 is fixedly sleeved with a spiral spring 2035 installed on the inner wall of the corresponding positioning block 2031, which provides a reset elastic force for the eccentric plate 2033. When the back panel of the mobile phone case is placed on the mold base 202, the first cylinder 203 is started, and its output end pushes the positioning block 2031 to move towards the back panel of the mobile phone case. When the positioning wheel 2034 contacts the back panel of the mobile phone case, the eccentric plate 2033 drives the rotating rod 2032 to rotate and compress the spiral spring 2035. The reset elastic force of the spiral spring 2035 makes the positioning wheel 2034 fit tightly against the back panel of the mobile phone case, achieving precise diagonal positioning.

[0027] like Figure 1 - Figure 3 As shown, the screen printing assembly 3 is fixedly installed on one side of the frame 101, including four optical rods 301 fixedly installed on the top of the frame 101. A top plate 305 is fixedly installed on the top of the four optical rods 301. A third cylinder 306 is fixedly installed on the top of the top plate 305. A lifting seat 303 is fixedly installed on the output end of the third cylinder 306. The output end of the third cylinder 306 acts on the lifting seat 303. The lifting seat 303 is slidably sleeved on the outer wall of the four optical rods 301, so that the lifting seat 303 moves up and down on the outer wall of the optical rods 301. At the four corners of its bottom, sliding sleeves 302 are fixedly installed and slidably sleeved on the outer wall of the corresponding optical rod 301. The top of the lifting seat 303... A second cylinder 304 is fixedly installed, and the output end of the second cylinder 304 is connected to a connecting plate 310. A buffer plate 307 is fixedly installed on the front side wall of the guide rod 301. An installation block 308 is installed at the bottom of the buffer plate 307. A screen printing plate 309 is installed at the bottom of the installation block 308. A screen printing screen 4 is fixedly installed at the bottom of the lifting seat 303. The screen printing screen 4 works with the screen printing component 3 and the mobile phone case positioning component 2 to complete the screen printing operation. During the screen printing operation, the lifting seat 303 is driven to descend along the guide rod 301, so that the screen printing screen 4 fits against the back panel of the mobile phone case. The second cylinder 304 is started, and the screen printing plate 309 is driven to move through the connecting plate 310, and the pattern is screen printed through the screen printing screen 4.

[0028] It should be noted that, in use, this screen printing machine with a positioning structure places the back panel of the mobile phone case on the mold base 202, starts the first cylinder 203, and its output end pushes the positioning block 2031 to move towards the back panel of the mobile phone case. When the positioning wheel 2034 contacts the back panel of the mobile phone case, the eccentric plate 2033 drives the rotating rod 2032 to rotate and compress the spiral spring 2035. The restoring force of the spiral spring 2035 makes the positioning wheel 2034 fit tightly against the back panel of the mobile phone case, achieving precise diagonal positioning.

[0029] Start the servo motor 103 to drive the lead screw 102 to rotate, which in turn drives the slider 105, mounting slide 106 and positioning seat 201 to slide along the slide groove and slide rod 108, and moves the positioned mobile phone case back panel to the bottom of the screen printing plate 4.

[0030] The third cylinder 306 is activated, driving the lifting seat 303 to descend along the light rod 301, so that the screen printing plate 4 fits the back panel of the mobile phone case; the second cylinder 304 is activated, driving the screen printing plate 309 to move through the connecting plate 310, and the pattern is screen printed through the screen printing plate 4.

[0031] After screen printing is completed, the third cylinder 306 and the second cylinder 304 drive each component to reset, the first cylinder 203 drives the positioning block 2031 to retract, the spiral spring 2035 drives the eccentric plate 2033 and the positioning wheel 2034 to reset, and the servo motor 103 drives the positioning seat 201 to return to the material pick-up and drop-off position, and the screen-printed mobile phone case back panel is taken out, completing a single operation.

[0032] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A screen printing machine with a positioning structure, comprising an adjustment assembly (1), characterized in that: The adjustment component (1) includes a frame (101), a screen printing component (3) is fixedly installed on one side of the frame (101), and a mobile phone case positioning component (2) is slidably connected to the top of the frame (101). The mobile phone case positioning component (2) includes a positioning seat (201) slidably connected above the frame (101). A plurality of mold seats (202) are fixedly installed on the top of the positioning seat (201). At least two sets of first cylinders (203) for positioning and limiting the back panel of the mobile phone case on the mold seat (202) are provided at the diagonal positions of the mold seat (202). The output end of each first cylinder (203) is fixedly connected to a positioning block (2031). Each of the positioning blocks (2031) has two rotating rods (2032) rotatably passing through its top. An eccentric plate (2033) located above the corresponding positioning block (2031) is fixedly sleeved on the outer wall of each rotating rod (2032). A positioning wheel (2034) is rotatably connected to the bottom of each eccentric plate (2033). A spiral spring (2035) fixedly installed on the inner wall of the corresponding positioning block (2031) is fixedly sleeved on the outer wall of each rotating rod (2032).

2. A screen printing machine with a positioning structure according to claim 1, characterized in that: The top of the frame (101) is provided with a sliding groove, and a lead screw (102) is rotatably connected to the inner side wall of the sliding groove. A slider (105) is threadedly sleeved on the outer side wall of the lead screw (102) and slidably connected in the sliding groove. A mounting slide (106) is fixedly connected to the top of the slider (105), and the positioning seat (201) is fixedly installed on the top of the mounting slide (106).

3. A screen printing machine with a positioning structure according to claim 2, characterized in that: Limiting seats (104) are fixedly installed on both sides of the top of the frame (101). Limiting grooves (107) are respectively opened on the top and sides of the two limiting seats (104). The two ends of the mounting slide (106) are slidably connected to the inner sidewall of the corresponding limiting groove (107). Slide rods (108) are fixedly installed on the inner sidewall of the two limiting grooves (107). The two ends of the mounting slide (106) are slidably sleeved on the outer sidewall of the corresponding slide rod (108).

4. A screen printing machine with a positioning structure according to claim 2, characterized in that: A servo motor (103) for driving the lead screw (102) to rotate is fixedly installed on the front side wall of the frame (101).

5. A screen printing machine with a positioning structure according to claim 1, characterized in that: The screen printing assembly (3) includes four optical rods (301) fixedly installed on the top of the frame (101). A top plate (305) is fixedly installed on the top of the four optical rods (301). A third cylinder (306) is fixedly installed on the top of the top plate (305). A lifting seat (303) that is slidably sleeved on the outer side wall of the four optical rods (301) is fixedly installed at the output end of the third cylinder (306). Sliding sleeves (302) that are slidably sleeved on the outer side wall of the corresponding optical rod (301) are fixedly installed at the four bottom corners of the lifting seat (303).

6. A screen printing machine with a positioning structure according to claim 5, characterized in that: A second cylinder (304) is fixedly installed on the top of the lifting seat (303). The output end of the second cylinder (304) is connected to a connecting plate (310). A buffer plate (307) is fixedly installed on the front side wall of the light rod (301). An installation block (308) is installed at the bottom of the buffer plate (307). A screen printing plate (309) is installed at the bottom of the installation block (308).

7. A screen printing machine with a positioning structure according to claim 6, characterized in that: The bottom of the lifting base (303) is fixedly installed with a screen printing plate (4) that cooperates with the screen printing assembly (3) and the mobile phone case positioning assembly (2).

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