Built-in Flexible Imprinting Device for Plastic Grid Punching Die

Abstract

The present invention provides an in-built flexible embossing device for a plastic grille punching die, which includes a punch fixing structure, a material discharging structure and a concave die structure. In the punch fixing structure, a fixing plate is installed at the bottom end of the upper template, a punch is provided at the bottom end of the fixing plate, and an elastic body is movably embedded in the fixing plate. One end of the elastic body is connected to the upper template, and the other end extends out of the fixing plate through the fixing plate. In the material discharging structure, the upper end of the material discharging plate is connected to the elastic body, and upper embossing ribs are provided on the bottom surface of the material discharging plate, and the punching end of the punch can pass through the material discharging plate. In the concave die structure, the concave die is fixedly installed at the top end of the lower template, and lower embossing ribs are provided on the top surface of the concave die. A plate is placed between the material discharging plate and the concave die, and the upper template and the lower template move away from or close to each other to punch holes and make indentations on the plate. The structure of the present invention is simple and easy to operate. The position dimension and shape dimension of the indentation on the plate are highly accurate, and it is easier to realize synchronous stretching of multiple holes on the plate after embossing, avoiding the problem of reducing the quality of the plastic grille due to temperature.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic grille forming, and relates to an imprinting device for a punching die of a plastic grille, in particular to an internal flexible imprinting device. Background Art

[0002] Plastic grilles are widely used in engineering construction such as roadbeds, dams, and slope protection, and can play a role in protecting roadbeds, slope protection, and preventing soil erosion. The existing punched polymer materials (PP, PE) perforated plates processed by punching dies only have hole shapes without indentations. When stretched longitudinally and transversely, the mesh holes will be uneven in size and the mesh will break. Only by increasing the temperature of the longitudinal multi-rolls and the transverse stretching box can the above situations be alleviated. However, it will cause defects such as increased energy consumption, low strength of the grille finished product, softness, and whiteness, and cannot meet the user's usage requirements. Therefore, there is an urgent need for an imprinting technology and device for plastic grille punching dies that can make the grille mesh holes uniform, have high strength, and low production energy consumption.

[0003] The existing imprinting devices mainly include two types: external rigid blank holding and external flexible blank holding, but both have certain drawbacks. For example, in the case of external rigid blank holding, when punching different material thicknesses, it is necessary to adjust the closing height by adding or reducing gaskets. The die and the press bear the rigid force, and if not careful, the die or the press may be damaged. At the same time, the press bears a large eccentric load moment. The external flexible blank holding can facilitate punching of different material thicknesses, but requires a separate elastic body to provide pressure, and the elastic body deviates from the pressure center of the press by a certain distance, so that the press bears a large eccentric load moment. Summary of the Invention

[0004] To solve the problems in the background art, the invention proposes an internal flexible imprinting device for a plastic grille punching die, including:

[0005] A punch fixing structure, the punch fixing structure includes a fixing plate and an upper template. The fixing plate is fixedly installed at the bottom end of the upper template. A punch is provided at one end of the fixing plate away from the upper template. An elastic body is movably embedded in the fixing plate. One end of the elastic body is connected to the upper template, and the other end of the elastic body passes through the fixing plate and extends out of the fixing plate;

[0006] A material discharging structure, the material discharging structure includes a stripper plate. The upper end of the stripper plate is connected to the elastic body. Upper imprinting ribs are provided on the bottom surface of the stripper plate. A punch hole for the punch to pass through is provided at a position corresponding to the punch on the stripper plate;

[0007] A die structure, the die structure includes a die and a lower template. The die is fixedly installed at the top end of the lower template. Lower imprinting ribs are provided on the surface of one end of the die away from the lower template. A buffer hole for the punching end of the punch to enter is provided at a position corresponding to the punch on the die;

[0008] The upper template and the lower template are connected by a telescopic mechanism. The upper template and the lower template are moved away from or close to each other under the action of the telescopic mechanism, and a plate is placed between the unloading plate and the concave die.

[0009] Preferably, a guide column is provided at the bottom end of the fixed plate, and a guide hole is provided on the discharge plate at a position corresponding to the guide column, and one end of the guide column away from the fixed plate slides through the guide hole.

[0010] Preferably, there are multiple upper embossed ribs evenly distributed on the bottom surface of the unloading plate, and there are multiple lower embossed ribs evenly distributed on the surface of the die away from the lower mold plate. The upper embossed ribs and the lower embossed ribs both include at least one of longitudinal ribs and transverse ribs.

[0011] Preferably, the cross-sectional shapes of the upper embossed rib and the lower embossed rib include V-shaped, U-shaped, elliptical, or composite shapes.

[0012] Preferably, the punches are provided in plurality and are evenly distributed, and the upper embossing rib and the lower embossing rib correspond to the axial center positions of the punches.

[0013] Preferably, the cross-sectional width of the upper and lower embossed ribs is 0.2-3 mm, and the total height of the upper and lower embossed ribs is h=h1+h2<0.2-0.4t, wherein h1 is the height of the upper embossed rib, h2 is the height of the lower embossed rib, and t is the thickness of the plate.

[0014] The beneficial effects of the present invention are as follows: the embossed ribs are arranged on the surface of the discharge plate and the die, the structure is simple, the operation is easy, and the accuracy of the position and shape dimensions of the plate indentation is high; due to the notch effect, the indentation on the plastic plate makes it easier to achieve multi-hole synchronous stretching when the plate is heated and stretched in the longitudinal and transverse directions, and at the same time, the stretching temperature can be significantly reduced, avoiding uneven grid mesh size and network breakage caused by temperature difference in equipment, and at the same time, the tensile strength of the grid product can be improved, avoiding defects such as softness and whitening of the product, improving the overall quality of the product, and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the indentation structure of the plate of the present invention;

[0017] Figure 3 This is a schematic diagram of the longitudinal and transverse embossed rib structure of the present invention;

[0018] Figure 4 This is a schematic diagram of the tooth shape of the embossed rib of the present invention;

[0019] Figure 5 It is a schematic diagram of the punch structure of the present invention.

[0020] Reference numerals in the figure: 1 - fixed plate, 2 - guide post, 3 - elastic body, 4 - upper template, 5 - punch, 51 - punch hole, 52 - buffer hole, 6 - stripper plate, 7 - upper embossing rib, 8 - lower embossing rib, 9 - sheet material, 10 - die, 11 - guide hole, 12 - lower template, 13 - upper indentation on the sheet material, 14 - lower indentation on the sheet material, 15 - longitudinal rib, 16 - transverse rib, 17 - V-shaped tooth, 18 - U-shaped tooth, 19 - oval tooth, 20 - composite tooth. Specific embodiments

[0021] For the sake of making the present invention clearer and more understandable, the following, in combination with the accompanying drawing description and specific embodiments, further elaborates in detail the technical solution of the present invention. It should be understood that the given embodiments are only one of the implementation manners and do not represent all embodiments.

[0022] Combined with the attached Figures 1-5 , an internal flexible embossing device for a plastic grid punching die, comprising:

[0023] A punch fixing structure, the punch fixing structure includes a fixed plate 1 and an upper template 4. The fixed plate 1 is fixedly installed at the bottom end of the upper template 4. One end of the fixed plate 1 away from the upper template 4 is provided with a punch 5. An elastic body 3 is movably embedded in the fixed plate 1. One end of the elastic body 3 is connected to the upper template 4, and the other end of the elastic body 3 passes through the fixed plate 1 and extends out of the fixed plate 1;

[0024] A material discharging structure, the material discharging structure includes a stripper plate 6. The upper end of the stripper plate 6 is connected to the elastic body 3. The bottom surface of the stripper plate 6 is provided with an upper embossing rib 7. A punch hole 51 for the punch 5 to pass through is provided at the position corresponding to the punch 5 on the stripper plate 6;

[0025] A die structure, the die structure includes a die 10 and a lower template 12. The die 10 is fixedly installed at the top end of the lower template 12. The surface of one end of the die 10 away from the lower template 12 is provided with a lower embossing rib 8. A buffer hole 52 for the punching end of the punch 5 to enter is provided at the position corresponding to the punch 5 on the die 10;

[0026] More specifically, during punching, the punch 5 passes through the stripper plate 6 through the punch hole 51. The punching end of the punch 5 takes away a part of the material on the sheet material 9. The punching end of the punch 5 pushes a part of the material on the sheet material 9 taken away into the buffer hole 52, and a punching hole is formed on the sheet material 9.

[0027] The upper template 4 and the lower template 12 are connected by a telescopic mechanism. The upper template 4 and the lower template 12 move away from or close to each other under the action of the telescopic mechanism. The sheet material 9 is placed between the stripper plate 6 and the die 10. The sheet material 9 forms an upper indentation 13 on the sheet material and a lower indentation 14 on the sheet material respectively under the action of the upper and lower embossing ribs.

[0028] Specifically, a guide column 2 is provided at the bottom end of the fixed plate 1, and a guide hole 11 is provided on the unloading plate 6 at a position corresponding to the guide column 2. The end of the guide column 2 away from the fixed plate 1 slides through the guide hole 11, and the unloading plate 6 moves along the guide column 2 through the guide hole 11 to ensure that the unloading plate 6 can move vertically.

[0029] Specifically, there are multiple upper embossing ribs 7 that are evenly distributed on the bottom surface of the unloading plate 6, and there are multiple lower embossing ribs 8 that are evenly distributed on the surface of the end of the die 10 away from the lower template 12. The upper embossing ribs 7 and the lower embossing ribs 8 both include at least one of the longitudinal ribs 15 and the transverse ribs 16. In actual working process, the upper embossing ribs 7 and the lower embossing ribs 8 can be used at the same time, or only one of the upper and lower embossing ribs can be used. Similarly, in actual work, the longitudinal ribs 15 and the transverse ribs 16 can be used at the same time, or only one of them can be used. The specific selection and formulation is based on the process requirements of the product. The embossing ribs are designed based on the characteristics of polymer materials, product performance, and production process requirements.

[0030] Specifically, the cross-sectional shapes of the upper embossed rib 7 and the lower embossed rib 8 include V-shaped, U-shaped, elliptical, or composite shapes, such as Figure 4 The V-shaped teeth 17, U-shaped teeth 18, elliptical teeth 19, and compound teeth 20 are shown.

[0031] Specifically, the punch 5 is provided with multiple punches 5, and the multiple punches 5 are evenly distributed. The upper embossing rib 7 and the lower embossing rib 8 correspond to the axial position of the punch 5, so that after the punch 5 punches a hole in the plate 9, the indentation produced by the upper and lower embossing ribs is located at the center of the punching hole.

[0032] Specifically, the cross-sectional width of the upper embossed rib 7 and the lower embossed rib 8 is 0.2 to 3 mm, and the cross-sectional width is selected according to the thickness of the plate 9 and the punching spacing. The total height of the upper embossed rib 7 and the lower embossed rib 8 is h=h1+h2<0.2~0.4t, where h1 is the height of the upper embossed rib 7, h2 is the height of the lower embossed rib 8, and t is the thickness of the plate 9.

[0033] Working process: the sheet 9 is fed into the mold through the feeder, and the upper template 4 moves downward under the action of the telescopic mechanism driven by the press, and at the same time drives the unloading plate 6 and the fixed plate 1 to move downward, pressing the sheet 9 for punching. At this time, the unloading plate 6 is pressed down by the elastic body 3, so that the upper embossing rib 7 applies pressure to the upper surface of the sheet 9, forming an indentation 13 on the sheet. At the same time, the lower embossing rib 8 on the upper surface of the die 10 applies pressure to the lower surface of the sheet 9, forming an indentation 14 on the sheet. After the punching and stamping is completed, the upper template 4, the fixed plate 1 and the unloading plate 6 move upward to complete the unloading, waiting for the feeder to feed forward, and the cycle repeats.

[0034] The above embodiments only illustrate the basic principles and characteristics of the present invention, but are not limited by the above embodiments. It should be understood that for those of ordinary skill in the art, various changes and modifications can be made to the present invention without departing from the spirit and scope of the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An in-built flexible embossing device for a plastic grille punching die, characterized in that, Including: A punch fixing structure, the punch fixing structure includes a fixing plate (1) and an upper template (4), the fixing plate (1) is fixedly installed at the bottom end of the upper template (4), a punch (5) is provided at one end of the fixing plate (1) away from the upper template (4), an elastic body (3) is movably embedded in the fixing plate (1), one end of the elastic body (3) is connected to the upper template (4), and the other end of the elastic body (3) passes through the fixing plate (1) and extends out of the fixing plate (1); A material discharging structure, the material discharging structure includes a stripping plate (6), the upper end of the stripping plate (6) is connected to the elastic body (3), an upper embossing rib (7) is provided on the bottom surface of the stripping plate (6), and a punch hole (51) for the punch (5) to pass through is provided at the position corresponding to the punch (5) on the stripping plate (6); A die structure, the die structure includes a die (10) and a lower template (12), the die (10) is fixedly installed at the top end of the lower template (12), a lower embossing rib (8) is provided on the surface of one end of the die (10) away from the lower template (12), and a buffer hole (52) for the punching end of the punch (5) to enter is provided at the position corresponding to the punch (5) on the die (10); The upper template (4) and the lower template (12) are connected by a telescopic mechanism, and the upper template (4) and the lower template (12) move away from or close to each other under the action of the telescopic mechanism, and a sheet (9) is placed between the stripping plate (6) and the die (10); There are multiple upper embossing ribs (7) and they are evenly distributed on the bottom surface of the stripping plate (6), there are multiple lower embossing ribs (8) and they are evenly distributed on the surface of one end of the die (10) away from the lower template (12), and both the upper embossing ribs (7) and the lower embossing ribs (8) include at least one of a longitudinal rib (15) and a transverse rib (16); There are multiple punches (5) and they are evenly distributed, and the upper embossing ribs (7) and the lower embossing ribs (8) correspond to the axis positions of the punches (5).

2. The built-in flexible embossing device of a plastic grille punching die according to claim 1, characterized in that: A guide post (2) is provided at the bottom end of the fixing plate (1), a guide hole (11) is provided at the position corresponding to the guide post (2) on the stripping plate (6), and the end of the guide post (2) away from the fixing plate (1) slides through the guide hole (11).

3. The built-in flexible embossing device of a plastic grille punching die according to claim 1, characterized in that: The cross-sectional shapes of the upper embossing ribs (7) and the lower embossing ribs (8) include V-shaped or U-shaped or elliptical or composite.

4. An in-built flexible embossing device for a plastic grille punching die according to claim 1, characterized in that: The cross-sectional width of the upper embossing ribs (7) and the lower embossing ribs (8) is 0.2 - 3 mm, and the total height of the upper embossing ribs (7) and the lower embossing ribs (8) is h = h1 + h2 < 0.2 - 0.4t, where h1 is the height of the upper embossing rib (7), h2 is the height of the lower embossing rib (8), and t is the thickness of the sheet (9).

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