Punching device for rubber sample

Abstract

The utility model relates to a punching device for a rubber sample, which comprises a lower tool apron, and a through annular tool edge is arranged on the lower tool apron; an upper tool apron is arranged on the lower tool apron, station clamping seats which are matched and symmetrical are arranged on the two sides of the tool edge, and the station clamping seats are arranged on the side, close to the upper tool apron, of the lower tool apron; a guide cylinder extending and protruding outwards is arranged on the side, away from the lower tool apron, of the upper tool apron, the upper tool apron and the guide cylinder are provided with a containing cavity matched and corresponding to a tool edge of the lower tool apron, and an upper stamping tool matched and corresponding to the tool edge is arranged in the containing cavity. The knife edge of the lower knife holder is trumpet-shaped, the inclined side wall of the annular knife edge gradually expands outwards from top to bottom, and the included angle A between the inclined side wall and the top surface of the lower knife holder is an obtuse angle; the station clamping base is arranged between the lower tool apron and the upper tool apron, the bottom face of the station clamping base is arranged adjacent to the top face of the lower tool apron, and the top face of the station clamping base is arranged adjacent to the top face of the upper tool apron. The device is high in reliability and stability, the yield of prepared samples is increased, the device is convenient to use, and the quality guarantee of the samples is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of test sample preparation, in particular to a rubber sample (punching) preparation device for a vulcanizer. Background Art

[0002] During the development and application of new rubber products, it is necessary to perform performance tests on rubber samples. In the existing preparation of rubber samples, a tubular cutter 34 is generally used to cut the sheet 31. See the attached Figure 5 As shown, the cut sample 32 is embedded in the hollow cylinder 37 (cavity) of the blade part of the tubular cutter 34, and the sample 32 in the cavity (hollow cylinder 37) of the tubular cutter 34 is pushed out by the ejection device to obtain the test sample 32, and the cut sample is then tested by the vulcanizer. The performance indexes such as the scorch time, positive vulcanization time, vulcanization rate, viscoelasticity and vulcanization flat period of the rubber vulcanization process are analyzed and measured by the vulcanizer, and the parameters of the rubber used for developing new products, studying rubber compound formulas and inspecting product quality are obtained.

[0003] The existing tubular cutter 34 is used to cut the sheet 31. The cutting force (pressure) for cutting a single sample needs to be greater than 500kg. The cut sample 32 will be stuck in the empty cylinder 37 (cavity) of the blade of the tubular cutter 34. The sample needs to be pushed out with the help of an ejection tool. The sample is easily damaged during the push, which affects the test results and increases the workload. At the same time, since the blade of the tubular cutter 34 directly touches the blade holder, the blade of the tubular cutter 34 is easily worn and not sharp enough, resulting in the cut of the sheet 31 not being completely disconnected, leaving a thread connection, and a low yield rate. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model aims to provide a punching device for rubber samples, so as to avoid damage to the blade of the punching knife and improve the yield rate.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A punching device for rubber samples comprises a lower knife seat, on which a through annular knife edge is formed; an upper knife seat is provided above the lower knife seat, and matching symmetrical workstation holders are provided on both sides of the knife edge, and the workstation holders are arranged on a side of the lower knife seat close to the upper knife seat;

[0007] A guide cylinder extending outward is provided on one side of the upper knife seat away from the lower knife seat, and an accommodating cavity matching the blade of the lower knife seat is provided on the upper knife seat and the guide cylinder, and an upper punch matching the blade is provided in the accommodating cavity;

[0008] The blade of the lower blade seat is trumpet-shaped, and the oblique side wall of the annular blade edge gradually expands outward from top to bottom, and the angle A between the oblique side wall and the top surface of the lower blade seat is an obtuse angle.

[0009] Further, in some embodiments, the station clamping seat is arranged between the lower tool holder and the upper tool holder. The bottom surface of the station clamping seat is closely arranged adjacent to the top surface of the lower tool holder, and the top surface of the station clamping seat is closely arranged adjacent to the top surface of the upper tool holder; a punching station is formed between the symmetrically arranged station clamping seats on both sides.

[0010] Further, in some embodiments, the included angle A between the inclined side wall and the top surface of the lower tool holder is 105° - 115°; preferably, the included angle A between the inclined side wall and the top surface of the lower tool holder is 110°.

[0011] Further, in some embodiments, the upper tool holder and the guiding cylinder are integrally formed;

[0012] The accommodating cavity of the upper tool holder and the guiding cylinder is coaxially arranged with the cutting edge, and the accommodating cavity is arranged through on the upper tool holder and the guiding cylinder.

[0013] Further, in some embodiments, the lower tool holder, the station clamping seat, and the upper tool holder are provided with coaxially corresponding assembly holes.

[0014] Further, in some embodiments, the lower tool holder is provided with two rows of a number of cutting edges arranged horizontally at intervals. A matching and symmetric station clamping seat is arranged on both sides of each cutting edge, and each row of punching stations is arranged at intervals in a straight line; a matching upper tool holder, guiding cylinder, and upper punching knife are arranged on the station clamping seat.

[0015] Further, in some embodiments, the lower tool holder is provided with two rows, with three cutting edges in each row.

[0016] The advantages of the present utility model are as follows:

[0017] 1. The punching of rubber specimens is reliable and stable. The upper punching knife directly punches all the specimens into the cutting edges of the lower tool holder, and the specimens are completely separated and disconnected from the material sheet, with high reliability and stability, improving the yield of specimen preparation;

[0018] 2. The present utility model reduces the influence of the traditional taking-out method on the quality of specimens, does not require an ejecting tool to push out the specimens, is convenient to use, and ensures the standardization of specimens;

[0019] 3. The inverted trumpet-shaped cutting edge is adopted, making the cutting edge of the lower tool holder sharp enough;

[0020] 4. The outer-expanded inclined side wall design is adopted inside the inverted trumpet-shaped cutting edge of the lower tool holder, enabling the specimens punched into the cutting edges of the lower tool holder to fall off easily, enhancing the quality guarantee of the specimens;

[0021] 5. The cutting force (punching force) required for punching a single specimen by the present utility model is only 120 kg, which is much less than the cutting force of more than 500 kg for cutting a single specimen by the existing tubular cutting knife, effectively saving energy consumption. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model;

[0023] Figure 2 It is an assembly schematic diagram of an embodiment of the present utility model;

[0024] Figure 3 It is a working schematic diagram of an embodiment of the present utility model;

[0025] Figure 4 It is a schematic structural diagram of a multi-edge cutter of an embodiment of the present utility model;

[0026] Figure 5 It is a schematic structural diagram of an existing sample cutter.

[0027] Description of the markings in the figure:

[0028] Lower tool holder 21, cutting edge 22, inclined side wall 23, punching station 24, station clamping seat 25, upper tool holder 26, guide cylinder 27, upper punching knife 28, assembly hole 29, sheet 31, sample 32, receiving cavity 33, tubular cutter 34, empty cylinder 37. Specific implementation manner

[0029] To further understand the features, technical means, and specific purposes and functions achieved by the present utility model, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. To further understand the features, technical means, and specific purposes and functions achieved by the present utility model, and to analyze the advantages and spirit of the present utility model, a further understanding can be obtained through the following detailed description of the present utility model in combination with the accompanying drawings and specific implementation manners.

[0030] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "front", "rear", and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0031] Refer to the attached Figure 1 As shown, the attached Figure 1 shows the overall structural schematic of the embodiment of this application. This application includes a lower tool holder 21, a through annular cutting edge 22 is formed on the lower tool holder 21, an upper tool holder 26 is provided above the lower tool holder 21, matching and symmetric station clamping seats 25 are provided on both sides of the cutting edge 22, and the station clamping seats 25 are arranged on one side of the lower tool holder 21 close to the upper tool holder 26.

[0032] On one side of the upper tool holder 26 away from the lower tool holder 21, there is a guide cylinder 27 extending and protruding outward, and the upper tool holder 26 and the guide cylinder 27 are integrally formed; on the upper tool holder 26 and the guide cylinder 27, there is a receiving cavity 33 that matches and corresponds to the cutting edge 22 of the lower tool holder 21. The receiving cavity 33 of the upper tool holder 26 and the guide cylinder 27 is coaxially arranged with the cutting edge 22, and the receiving cavity 33 is arranged through the upper tool holder 26 and the guide cylinder 27. In the receiving cavity 33, there is an upper punching knife 28 that matches and corresponds to the cutting edge 22.

[0033] Further, in one embodiment, the upper punching knife 28 and the cutting edge 22 form a punching knife. Refer to the attached Figure 1 As shown, after the upper punching knife 28 punches downward, the bottom end extends into the inside of the cutting edge 22. The cutting edge 22 of the lower tool holder 21 is trumpet-shaped, and the inclined side wall 23 of the annular cutting edge 22 gradually expands outward from top to bottom. The angle A between the inclined side wall 23 and the top surface of the lower tool holder 21 is an obtuse angle.

[0034] The angle A between the inclined side wall 23 and the top surface of the lower tool holder 21 is 105° - 115°; preferably, the angle A between the inclined side wall 23 and the top surface of the lower tool holder 21 is 110°.

[0035] The station clamping seat 25 is arranged between the lower tool holder 21 and the upper tool holder 26. The bottom surface of the station clamping seat 25 is closely adjacent to the top surface of the lower tool holder 21, and the top surface of the station clamping seat 25 is closely adjacent to the top surface of the upper tool holder 26; between the symmetrically arranged station clamping seats 25 on both sides, a punching station 24 is formed. A strip-shaped material sheet 31 is placed on the punching station 24, and after the upper punching knife 28 and the cutting edge 22 punch the material sheet 31, a specimen 32 is obtained.

[0036] Further, in one embodiment, the lower tool holder 21, the station clamping seat 25, and the upper tool holder 26 are provided with coaxially corresponding assembly holes 29.

[0037] Refer to the attached Figure 4 As shown, the attached Figure 4 shows the structure of the combined punching knife. The lower tool holder 21 is provided with a number of cutting edges 22 arranged horizontally at intervals; further, the lower tool holder 21 is provided with two rows of a number of cutting edges 22 arranged horizontally at intervals. On both sides of each cutting edge 22, there are matching and symmetric station clamping seats 25. Each row of punching stations 24 is arranged at intervals in a straight line; on the station clamping seat 25, there are matching corresponding upper tool holders 26, guide cylinders 27, and upper punching knives 28. Preferably, the structure of the combined punching knife adopts a 2×3 arrangement, that is, two rows and three cutting edges 22 in each row are arranged.

[0038] The sample 32 cut by the present utility model is placed on the bearing plate of a vulcanizer, and the vulcanizer analyzes and measures performance indexes such as the scorch time, optimum cure time, vulcanization rate, viscoelasticity, and vulcanization plateau period of the rubber vulcanization process of the sample 32. The cutting force (punching force) for cutting a single sample 32 by the present utility model is only 120 kg, while the cutting force for cutting a single sample 32 by the existing tubular cutter 34 is greater than 500 kg. The present utility model has low energy consumption and effectively saves energy.

[0039] The above embodiments only express several preferred embodiments of the present utility model. The description is relatively specific and detailed. It should be understood that the present utility model is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the technology or knowledge in the relevant field. It should not be understood as a limitation to the scope of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the inventive concept of the present utility model, several deformations and improvements can still be made. The changes and alterations made by those skilled in the art do not depart from the spirit and scope of the present utility model, and all of these fall within the protection scope of the appended claims of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A punching device for a rubber sample, comprising: A lower knife seat (21), wherein a through annular knife edge (22) is formed on the lower knife seat (21); characterized in that an upper knife seat (26) is formed on the upper surface of the lower knife seat (21), and matching symmetrical workstation holders (25) are formed on both sides of the knife edge (22), and the workstation holders (25) are arranged on one side of the lower knife seat (21) close to the upper knife seat (26); A guide cylinder (27) extending outward is provided on one side of the upper knife seat (26) away from the lower knife seat (21); an accommodating cavity (33) matching the knife edge (22) of the lower knife seat (21) is provided on the upper knife seat (26) and the guide cylinder (27); an upper punch (28) matching the knife edge (22) is provided in the accommodating cavity (33); The blade edge (22) of the lower blade seat (21) is trumpet-shaped, and the oblique side wall (23) of the annular blade edge (22) gradually expands outward from top to bottom, and the angle A between the oblique side wall (23) and the top surface of the lower blade seat (21) is an obtuse angle.

2. A rubber sample punching device according to claim 1, characterized in that: The station holder (25) is arranged between the lower knife seat (21) and the upper knife seat (26); the bottom surface of the station holder (25) is arranged adjacent to the top surface of the lower knife seat (21); the top surface of the station holder (25) is arranged adjacent to the top surface of the upper knife seat (26); a punching station (24) is formed between the station holders (25) symmetrical on both sides.

3. A rubber sample punching device according to claim 1, characterized in that: The included angle A between the inclined side wall (23) and the top surface of the lower knife seat (21) is 105° to 115°.

4. A rubber sample punching device according to claim 1, characterized in that: The upper knife seat (26) and the guide cylinder (27) are integrally formed; The accommodating chamber (33) of the upper knife seat (26) and the guide cylinder (27) is coaxially arranged with the knife edge (22), and the accommodating chamber (33) is arranged on the upper knife seat (26) and the guide cylinder (27) in a through manner.

5. A rubber sample punching device according to claim 1, characterized in that: The lower knife seat (21), the work station holder (25) and the upper knife seat (26) are provided with coaxial corresponding assembly holes (29).

6. A rubber sample punching device according to claim 1, characterized in that: The lower knife seat (21) is provided with two rows of blade edges (22) arranged at intervals in a transverse direction, and each blade edge (22) is provided with matching symmetrical station holders (25) on both sides, and each row of punching stations (24) is arranged at intervals in a straight line; The work station holder (25) is provided with a matching upper knife seat (26), a guide cylinder (27) and an upper punch (28).

7. A rubber sample punching device according to claim 6, characterized in that: The lower knife seat (21) is provided with two rows of knife edges (22), with three knife edges in each row.

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