Punching device for plastic strip with hole

Abstract

The invention relates to a punching device for plastic strips with holes. The punching device comprises a conveying table, a punching mechanism connected to the side face of the conveying table and a pushing mechanism. A discharging hole capable of discharging punching excess materials is formed in the middle of the conveying table. The punching mechanism at least comprises a driving assembly, a frame body driven by the driving assembly to move up and down, and a punching head fixedly connected to the frame body and located over the discharging hole. The pushing mechanism comprises a back plate connected to the frame body and capable of synchronously moving up and down, a deflector rod rotationally connected to the lower portion of the back plate and a tension spring, and the two ends of the tension spring are fixedly connected with the deflector rod and the frame body respectively; the frame body moves up and down in a reciprocating mode through rotation of the eccentric wheel and reset of the reset spring, the frame body drives the pushing mechanism to move downwards, the shifting rod pushes the plastic strip to move transversely in the downward moving process so that the downward moving punching position on the surface of the plastic strip can be aligned to the position below the punching head, and the frame body drives the punching head to punch. And the reciprocating type moving plastic strip and the interval punching are linked through the single-drive action, so that the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic parts processing equipment, and in particular to a punching device for a plastic strip with holes. Background Art

[0002] In the production process of plastic parts, manufacturing long, narrow and thin plastic strips with holes faces a series of technical challenges. When using the traditional molten plastic injection molding method, the porous structure can easily lead to quality problems such as bubbles, voids or insufficient filling. In addition, during the cooling stage, the temperature difference between different areas will cause uneven shrinkage, which will affect the dimensional stability and shape consistency of the product. For longer and thinner plastic strips, the demolding process also becomes particularly difficult.

[0003] In view of the above problems, the extrusion molding process has become the preferred solution for the production of such products. Extrusion molding can continuously produce long plastic strips with high consistency of surface material. However, the extruded plastic strips need to be further processed to form the required hole structure. At present, industrial practice usually adopts a combination of conveying machinery and punching machinery for subsequent processing. Although this method can achieve precise punching, it has the problem of high equipment cost, especially for plastic strips with narrow width, which requires extremely high matching accuracy of the conveying system and the punching system. In order to ensure the accuracy of the punching position, a special positioning detection mechanism must be set up, and a certain amount of time must be reserved for adjustment and calibration, which makes the entire production process lack linkage, affecting continuous production and overall efficiency. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] The object of the present invention is to provide a punching device for a plastic strip with holes, which can realize the movement of a narrow and thin plastic strip and the positioning punching in an integrated manner, thereby improving production efficiency.

[0006] 2. Technical Solution

[0007] The present invention is achieved through the following technical solutions:

[0008] The present invention provides a punching device for a plastic strip with a hole, comprising:

[0009] A conveying platform, the conveying platform is used to support the plastic strip, and the center of the conveying platform has a discharge hole for discharging the punching surplus material;

[0010] A punching mechanism connected to the side of the conveying platform, the punching mechanism at least includes a driving assembly, a frame body driven by the driving assembly to move up and down, and a punching head fixedly connected to the frame body and located directly above the discharge hole;

[0011] The pushing mechanism includes a back plate connected to the frame body and capable of synchronously moving up and down, a lever rotatably connected to the bottom of the back plate, and a tension spring, wherein the two ends of the tension spring are respectively fixedly connected to the lever and the frame body;

[0012] A wedge-shaped block located below the lever, the wedge-shaped block comprising an inclined surface and a vertical surface connected to a lower side of the inclined surface;

[0013] The lower end of the lever can pass through the punching hole on the surface of the plastic strip and contact the inclined surface, and when the lower end of the lever moves to the vertical surface, the lever is in a vertical state, and the punching head contacts the surface of the plastic strip.

[0014] Furthermore, the frame body has a limiting rod protruding toward the back plate, and the limiting rod can abut against the side surface of the shifting rod to limit the shifting rod from rotating upward.

[0015] Furthermore, a check mechanism is provided on the side of the conveying platform, and the check mechanism includes a base connected to the conveying platform, a check rod rotatably connected to the base, and a compression spring connected between the check rod and the surface of the base; the end of the check rod is bent upward into a vertical shape and extends into the punching hole, and the end of the check rod is set as an inclined contact surface on one side facing the conveying platform and a vertical direct contact surface on the other side. When the plastic strip is moved laterally by the lever, the inclined contact surface of the check rod is resisted by the hole wall and moves downward until the end of the check rod is separated from the punching hole.

[0016] Furthermore, the frame body has a horizontal plate on its side, two parallel horizontal grooves are formed on the surface of the horizontal plate, and two holes are formed on the surface of the back plate, and the back plate is fixed to the horizontal plate by bolts passing through the holes and the horizontal grooves.

[0017] Furthermore, a plurality of connecting holes are equidistantly provided on the side of the base, and an extension plate extending to the rear side of the base is provided under the conveying platform. Two positioning holes are provided on the surface of the extension plate, and the spacing between the positioning holes is equal to the spacing between adjacent connecting holes. The base can be fixed at different distances away from the conveying platform by passing bolts through the positioning holes and different connecting holes.

[0018] Furthermore, the conveying platform includes a bottom plate, side plates fixedly connected to both sides above the bottom plate, a first support block and a second support block arranged on the left and right sides of the two side plates, a discharge hole is formed at a distance between the first support block and the second support block, a collecting chamber is formed below the first support block at a distance from the bottom plate, the side surface of the second support block extends to the outside of the side plate, and the wedge block is fixedly connected to the second support block.

[0019] Furthermore, the driving assembly includes a mounting frame, a motor fixedly connected to the top of the mounting frame, and an eccentric wheel fixedly connected to the output end of the motor; a flat plate is fixedly connected to the rear side of the frame, a guide hole is opened on the surface of the flat plate, the mounting frame has a fixed plate located below the flat plate, a guide rod is fixedly connected above the fixed plate, the guide rod is slidably connected in the guide hole, a reset spring is sleeved on the outside of the guide rod, and both ends of the reset spring are respectively fixedly connected to the flat plate and the fixed plate; a crossbeam is fixed above the frame, and the edge of the eccentric wheel abuts against the crossbeam.

[0020] Furthermore, a guide rail is vertically arranged on the surface of the frame, a guide block is fixedly connected to the front side of the mounting frame, and a guide groove is provided on the guide block for sliding connection with the guide rail.

[0021] 3. Beneficial Effects

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention enables the frame to reciprocate up and down through the rotation of the eccentric wheel and the reset spring, the frame drives the pushing mechanism to move downward, the lever pushes the plastic strip to move horizontally during the downward movement so that the downward punching position of the plastic strip surface is aligned under the punching head, the frame drives the punching head to punch holes, and the reciprocating plastic strip and the interval punching holes are linked through a single driving action, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0025] Figure 2 yes Figure 1 Front perspective view of

[0026] Figure 3 yes Figure 2 A partial enlarged view of part A;

[0027] Figure 4 yes Figure 1 Left perspective view of

[0028] 1. Conveying platform; 11. Bottom plate; 12. Side plate; 13. First bracket; 14. Second bracket; 15. Discharge hole; 16. Collecting chamber; 17. Wedge block; 171. Inclined surface; 172. Vertical surface; 18. Extension plate; 181. Positioning hole; 2. Punching mechanism; 21. Driving assembly; 211. Mounting frame; 212. Motor; 213. Eccentric wheel; 214. Fixing plate; 215. Guide rod; 216 , guide block; 2161, guide groove; 22, frame; 221, cross plate; 2211, cross groove; 222, cross beam; 223, guide rail; 224-limit rod; 23, punching head; 24, flat plate; 241, guide hole; 25, reset spring; 3, pushing mechanism; 31, back plate; 32, lever; 33, tension spring; 4, check mechanism; 41, base; 411, connecting hole; 42, check rod; 43, compression spring. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] A punching device for plastic strips with holes, see Figure 1-4 , including a conveying platform 1, a punching mechanism 2 connected to the side of the conveying platform 1, a pushing mechanism 3 and a wedge block 17; wherein the conveying platform 1 is used to support the plastic strip, the punching mechanism 2 punches the plastic strip on the conveying platform 1, and the pushing mechanism 3 is used to horizontally drive the plastic strip to move to control the punching position.

[0031] The conveyor platform 1 includes a bottom plate 11, side plates 12 fixedly connected to both sides above the bottom plate 11, and a first bracket block 13 and a second bracket block 14 arranged on the left and right sides of the two side plates 12. A discharge hole 15 is formed in the middle of the conveyor platform 1 at a distance between the first bracket block 13 and the second bracket block 14, and a collecting chamber 16 is formed below the first bracket block 13 at a distance from the bottom plate 11. The side surface of the second bracket block 14 extends to the outside of the side plate 12, and the residual material after punching enters the collecting chamber 16 through the discharge hole 15, which is convenient for cleaning.

[0032] The punching mechanism 2 at least includes a driving assembly 21, a frame 22 driven by the driving assembly 21 to move up and down, and a punching head 23 fixedly connected to the frame 22 and located directly above the discharge hole 15;

[0033] Among them, in one embodiment of the present invention, the driving component 21 includes a mounting frame 211, a motor 212 and an eccentric wheel 213, wherein the motor 212 is fixedly connected to the top of the mounting frame 211, and the eccentric wheel 213 is fixedly connected to the output end of the motor 212; a crossbeam 222 is fixedly provided on the top of the frame 22, a flat plate 24 is fixedly connected to the rear side of the frame 22, a guide hole 241 is provided on the surface of the flat plate 24, a fixing plate 214 is provided on the mounting frame 211 and is located below the flat plate 24, a guide rod 215 is fixedly connected above the fixing plate 214, the guide rod 215 is slidably connected to the guide hole 241, a reset spring 25 is sleeved on the outside of the guide rod 215, and the two ends of the reset spring 25 are fixedly connected to the flat plate 24 and the fixing plate 214, respectively. The motor 212 drives the eccentric wheel 213 to rotate, and the edge of the eccentric wheel 213 contacts the cross beam 222. When the eccentric wheel 213 rotates, the cross beam 222 is pressed downward. When the distance between the connection between the eccentric wheel 213 and the motor 212 and the edge of the eccentric wheel 213 increases, the cross beam 222 drives the frame 22 to move downward. When the distance between the connection between the eccentric wheel 213 and the motor 212 and the edge of the eccentric wheel 213 decreases, the frame 22 moves upward under the action of the reset spring 25. In addition, a guide rail 223 is vertically arranged on the surface of the frame 22, and a guide block 216 is fixedly connected to the front side of the mounting frame 211. A guide groove 2161 is opened on the guide block 216, and the guide rail 223 is slidably connected to the guide groove 2161 so that the frame 22 can move stably up and down.

[0034] As an optional implementation, the driving assembly 21 may also be a hydraulic cylinder connected to the frame 22 and capable of being retracted to drive the frame 22 to move up and down.

[0035] The pushing mechanism 3 in the present invention comprises a back plate 31 connected to the frame 22, a lever 32 rotatably connected to the bottom of the back plate 31, and a tension spring 33, the two ends of the tension spring 33 are respectively fixedly connected to the lever 32 and the frame 22, the frame 22 has a limit rod 224 protruding toward the back plate 31, the limit rod 224 can abut against the side of the lever 32 to limit the lever 32 from rotating upward; a wedge block 17 is arranged below the lever 32, the wedge block 17 can be fixedly connected to the second support block 14, the wedge block 17 comprises an inclined surface 171, and a vertical surface 172 connected to a lower side of the inclined surface 171;

[0036] A check mechanism 4 is provided on the side of the conveyor platform 1, and the check mechanism 4 includes a base 41 connected to the conveyor platform 1, a check rod 42 rotatably connected to the base 41, and a compression spring 43 connected between the check rod 42 and the surface of the base 41; the end of the check rod 42 is bent upward to a vertical shape and extends into the punching hole, and the end of the check rod 42 is set as an inclined contact surface on one side facing the conveyor platform 1, and the other side is set as a vertical direct contact surface;

[0037] When in use, the eccentric wheel 213 rotates and presses the frame body 22 downward, and the frame body 22 drives the back plate 31 to move downward synchronously, and the back plate 31 drives the lever 32 to move downward, and the lower end of the lever 32 passes through the punching hole opened on the surface of the plastic strip and contacts the inclined surface 171. When the lever 32 continues to move downward, the lever 32 gradually rotates to a vertical state under the pressure of the inclined surface 171. During the rotation of the lever 32, the lever 32 simultaneously moves the plastic strip to move the plastic strip laterally. At this time, the inclined contact surface of the check rod 42 is resisted by the hole wall of the punching hole into which its end extends, causing the check rod 42 to move downward as a whole, until the end of the check rod 42 is separated from the punching hole and moves below the plastic strip; when the lower end of the lever 32 moves to the vertical surface 172, the lever 32 is in a vertical state, and the check rod 42 is The end of the rod 42 extends into the next adjacent punching hole, and the punching head 23 contacts the surface of the plastic strip; the eccentric wheel 213 continues to rotate, so that the frame 22 continues to drive the punching head 23 to move downward, and the punching head 23 punches holes in the plastic strip, and the punching residue directly falls into the discharge hole 15 below; the eccentric wheel 213 continues to rotate, and the frame 22 moves upward under the action of the reset spring 25, and the frame 22 drives the punching head 23 and the back plate 31 to move upward, and the back plate 31 drives the lever 32 to move upward. At this time, the vertical direct contact surface of the check rod 42 is in contact with the punching hole, so that the plastic strip cannot be pushed by the lever 32 and moves in the opposite direction, and the lower end of the lever 32 is separated from the punching hole and is supported by the limit rod 224; the rotation of the eccentric wheel 213 drives the frame 22 to move up and down reciprocatingly to automatically move the plastic strip and punch holes, thereby improving production efficiency.

[0038] Optionally, the back plate 31 and the frame 22 have an adjustable horizontal position. The frame 22 has a horizontal plate 221 on the side, and two parallel horizontal grooves 2211 are opened on the surface of the horizontal plate 221. Two holes are opened on the surface of the back plate 31. The back plate 31 is fixed to the horizontal plate 221 by bolts passing through the holes and the horizontal grooves 2211; a plurality of connection holes 411 are opened at equal intervals on the side of the base 41, and an extension plate 18 extending to the rear side of the base 41 is provided below the conveying platform 1. Two positioning holes 181 are opened on the surface of the extension plate 18. The spacing between the positioning holes 181 is equal to the spacing between adjacent connection holes 411. The base 41 can be fixed at different distances away from the conveying platform 1 by bolts passing through the positioning holes 181 and different connection holes 411. By fixing the back plate 31 at different positions on the horizontal plate 221 and the base 41 at different distances away from the conveying platform 1, the positions of the lever 32 and the check rod 42 can be controlled, and by replacing the second bracket 14, it is possible to adapt to punching holes of different spacings on the plastic strip.

[0039] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. A punching device for a plastic strip with holes, characterized in that: include: A conveying platform, the conveying platform is used to support the plastic strip, and the middle of the conveying platform has a discharge hole for discharging the punching surplus material; A punching mechanism connected to the side of the conveying platform, the punching mechanism at least includes a driving assembly, a frame body driven by the driving assembly to move up and down, and a punching head fixedly connected to the frame body and located directly above the discharge hole; The pushing mechanism includes a back plate connected to the frame body and capable of synchronously moving up and down, a lever rotatably connected to the bottom of the back plate, and a tension spring, wherein the two ends of the tension spring are respectively fixedly connected to the lever and the frame body; A wedge-shaped block located below the lever, the wedge-shaped block comprising an inclined surface and a vertical surface connected to a lower side of the inclined surface; The lower end of the lever can pass through the punching hole on the surface of the plastic strip and contact the inclined surface, and when the lower end of the lever moves to the vertical surface, the lever is in a vertical state, and the punching head contacts the surface of the plastic strip.

2. A punching device for a plastic strip with holes according to claim 1, characterized in that: The frame body has a limiting rod protruding toward the back plate, and the limiting rod can abut against the side surface of the shifting rod to limit the shifting rod from rotating upward.

3. A punching device for a plastic strip with holes according to claim 2, characterized in that: A check mechanism is arranged on the side of the conveying platform, and the check mechanism comprises a base connected to the conveying platform, a check rod rotatably connected to the base, and a compression spring connected between the check rod and the surface of the base; the end of the check rod is bent upward into a vertical shape and extends into the punching hole, and the end of the check rod is arranged to have an inclined contact surface on one side facing the conveying platform and a vertical direct contact surface on the other side. When the plastic strip is moved laterally by the lever, the inclined contact surface of the check rod is resisted by the hole wall and moves downward until the end of the check rod is separated from the punching hole.

4. A punching device for a plastic strip with holes according to claim 2, characterized in that: The side surface of the frame body is provided with a transverse plate, the surface of the transverse plate is provided with two parallel transverse grooves, the surface of the back plate is provided with two holes, and the back plate is fixed to the transverse plate by bolts passing through the holes and the transverse grooves.

5. A punching device for a plastic strip with holes according to claim 4, characterized in that: A plurality of connection holes are equidistantly provided on the side of the base, an extension plate extending to the rear side of the base is provided under the conveying platform, two positioning holes are provided on the surface of the extension plate, and the spacing between the positioning holes is equal to the spacing between adjacent connection holes. The base can be fixed at different distances away from the conveying platform by passing bolts through the positioning holes and different connection holes.

6. A perforated plastic strip punching device according to any one of claims 1 to 5, characterized in that: The conveying platform includes a bottom plate, side plates fixedly connected to both sides above the bottom plate, a first support block and a second support block arranged on the left and right sides of the two side plates, a discharge hole is formed at a distance between the first support block and the second support block, a collecting chamber is formed below the first support block at a distance from the bottom plate, the side surface of the second support block extends to the outside of the side plate, and the wedge block is fixedly connected to the second support block.

7. A punching device for a plastic strip with holes according to claim 6, characterized in that: The driving assembly includes a mounting frame, a motor fixedly connected to the top of the mounting frame, and an eccentric wheel fixedly connected to the output end of the motor; a flat plate is fixedly connected to the rear side of the frame, a guide hole is opened on the surface of the flat plate, a fixing plate located below the flat plate is provided on the mounting frame, a guide rod is fixedly connected to the top of the fixing plate, the guide rod is slidably connected to the guide hole, a reset spring is sleeved on the outside of the guide rod, and two ends of the reset spring are respectively fixedly connected to the flat plate and the fixing plate; a crossbeam is fixed on the top of the frame, and the edge of the eccentric wheel abuts against the crossbeam.

8. A punching device for a plastic strip with holes according to claim 7, characterized in that: A guide rail is vertically arranged on the surface of the frame body, a guide block is fixedly connected to the front side of the mounting frame, and a guide groove which is slidably connected to the guide rail is provided on the guide block.

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