Rubber and plastic dumbbell-shaped sample cutting device

Abstract

The utility model relates to a rubber and plastic dumbbell-shaped sample cutting device. Belongs to the technical field of testing devices. The device mainly solves the problems that the sample is easily damaged and the test result is influenced when the sample is manually ejected. The device is mainly characterized by consisting of a dumbbell-shaped cutter, an ejection support, a spring, an ejection plate and a fixing screw, wherein the dumbbell-shaped cutting tool is provided with a dumbbell-shaped cavity, and at least a lower port of the dumbbell-shaped cavity is open; the ejection support is fixedly mounted at the upper part of the dumbbell-shaped cavity; and the ejection plate is connected with the ejection support through a spring and is arranged at the bottom of the dumbbell-shaped cavity. The dumbbell-shaped sample cutting device has the characteristics that the whole cut dumbbell-shaped sample can be ejected out of a dumbbell-shaped cavity, the sample is uniformly stressed, the quality and the accuracy of the sample are improved, and the sample cutting efficiency is greatly improved; and the dumbbell-shaped sample cutting device is mainly used for cutting a standard dumbbell-shaped sample from a workpiece.

Description

Technical Field

[0001] The utility model belongs to the technical field of test devices, and in particular relates to a sample cutting device for rubber and plastic dumbbell-shaped samples. Background Art

[0002] Plastic tensile property testing often requires the use of standard dumbbell-shaped specimens for testing. Standard dumbbell-shaped specimens can be obtained by molding, but some industries, especially the automotive industry, often require standard dumbbell-shaped specimens to be cut from parts. Currently, the industry widely uses special dumbbell-shaped cutters to cut specimens: place the dumbbell-shaped cutter on the surface of the plastic part, use a stamping device to impact the cutter, and then use a tool to manually eject the specimen.

[0003] When ejecting manually, one end of the specimen is usually ejected first, and then the specimen is pulled out. During this process, the specimen is subjected to force, which can easily cause damage to the specimen and affect the test results. Since the effective part in the middle of the dumbbell-shaped specimen is relatively narrow, it is easy to get stuck in the cutter and is not easy to eject. The method of ejecting one end first is more likely to cause damage to the effective part in the middle of the specimen, seriously affecting the test results. Summary of the invention

[0004] The purpose of the utility model is to provide a rubber and plastic dumbbell-shaped sample cutting device to address the deficiencies in the above-mentioned existing dumbbell-shaped sample cutting technology, which can solve the problem of damage to the effective middle part of the sample caused by ejecting one end first when the sample is manually ejected, and has the advantages of simple operation and high sample quality.

[0005] The technical solution of the utility model is: a rubber and plastic dumbbell-shaped sample cutting device, which is characterized by: consisting of a dumbbell-shaped cutting knife, an ejection support, a spring, an ejection plate and a fixing screw; wherein the dumbbell-shaped cutting knife has a dumbbell-shaped cavity with at least a lower port open; the ejection support is installed and fixed on the upper part of the dumbbell-shaped cavity; the ejection plate is connected to the ejection support through a spring and installed at the bottom of the dumbbell-shaped cavity.

[0006] The ejector plate described in the technical solution of the utility model is in the shape of a dumbbell which matches the dumbbell-shaped cavity.

[0007] The ejector plate described in the technical solution of the utility model is installed below the ejector support through two symmetrically arranged springs.

[0008] The two springs described in the technical solution of the utility model are respectively located on the dumbbell-shaped ends at both ends of the ejection plate.

[0009] The bottom surface of the ejection support described in the technical solution of the utility model is provided with a spring installation groove; the upper end of the spring is installed in the installation groove.

[0010] The ejector plate described in the technical solution of the utility model is lower than the lower surface of the dumbbell-shaped cutter in a free state.

[0011] The ejector support, spring and ejector plate (4) described in the technical solution of the utility model are all made of metal; the ejector plate and ejector support are respectively welded to the two ends of the spring.

[0012] The dumbbell-shaped cutter described in the technical solution of the utility model is made of stainless steel.

[0013] The upper port of the dumbbell-shaped cutter described in the technical solution of the utility model is open; the ejection support is in the shape of a dumbbell column, and the upper surface is lower than the upper surface of the dumbbell-shaped cutter.

[0014] The ejection support and the dumbbell-shaped cutter described in the technical solution of the utility model are fixed together by fixing screws.

[0015] The utility model adopts a rubber and plastic dumbbell-shaped sample cutting device composed of a dumbbell-shaped cutting knife, an ejection support, a spring, an ejection plate and fixing screws, wherein the dumbbell-shaped cutting knife has a dumbbell-shaped cavity with at least a lower end open, the ejection support is fixedly installed on the upper part of the dumbbell-shaped cavity, the ejection plate is connected with the ejection support through a spring, and is installed on the bottom of the dumbbell-shaped cavity. Therefore, when cutting a standard dumbbell-shaped sample from a workpiece, the rubber and plastic plate to be cut and the utility model are placed on a pad in sequence, the punching machine is started and pressed downward, the pressure head of the punching machine presses the dumbbell-shaped cutting knife with force, the rubber and plastic plate is pressed to cut a sample consistent with the shape of the dumbbell-shaped cutting knife, and the spring is elastically deformed under pressure to generate a reaction force. When the pressure head of the punching machine is lifted, the reaction force of the spring is transmitted to the ejection plate to automatically eject the sample out of the inner cavity of the dumbbell-shaped cutting knife, so that the dumbbell-shaped sample is obtained, and the cutting is completed.

[0016] The utility model has the characteristics of being able to eject the cut dumbbell-shaped specimen as a whole from the dumbbell-shaped cavity, evenly stressing the specimen, improving the quality and accuracy of the specimen and greatly improving the cutting efficiency, and is mainly used for cutting standard dumbbell-shaped specimens from workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 It is a cross-sectional view of the utility model.

[0019] Numbers in the figure: 1-dumbbell-shaped cutter; 2-ejector support; 3-spring; 4-ejector plate; 5-fixing screw; 6-dumbbell-shaped specimen. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings.

[0021] like Figure 1 , Figure 2 As shown, an embodiment of a rubber and plastic dumbbell-shaped specimen cutting device is composed of a dumbbell-shaped cutting knife 1, an ejection support 2, a spring 3, an ejection plate 4 and a fixing screw 5, and is mainly used to cut standard dumbbell-shaped specimens from a workpiece.

[0022] The dumbbell-shaped cutter 1 has a dumbbell-shaped hollow structure inside, with upper and lower ports open, and the lower port is a cutter blade made of stainless steel. The dumbbell-shaped cutter 1 forms a dumbbell-shaped cavity. The dumbbell-shaped lower port is consistent with the standard dumbbell-shaped specimen.

[0023] The ejector support 2 is a dumbbell-shaped column matched with the dumbbell-shaped cavity and is made of metal. The ejector support 2 is fixed to the upper part of the dumbbell-shaped cavity by fixing screws 5, and the upper surface should be lower than the upper surface of the dumbbell-shaped cutter 1. Two spring mounting grooves are symmetrically arranged on the bottom surface of the dumbbell wide surface at both ends of the ejector support 2.

[0024] The spring 3 is made of metal. The upper ends of the two springs 3 are respectively located in two spring installation grooves on the bottom surface of the ejection support 2 and are welded with the ejection support 2.

[0025] The ejector plate 4 is dumbbell-shaped to match the dumbbell-shaped cavity, and its shape is similar to that of the ejector support 2, and it is made of metal. The lower ends of the two springs 3 are welded to the ejector plate 4, and the two welding points are respectively located at the corresponding positions of the dumbbell wide surfaces at both ends of the ejector plate 4. The ejector plate 4 is installed at the bottom of the dumbbell-shaped cavity through the spring 3. When the sample cutting device is in a free state, the ejector plate 4 should be lower than the lower surface of the dumbbell-shaped cutter 1. The shape of the ejector plate 4 is similar to the surface shape of the dumbbell-shaped sample cut by the dumbbell-shaped cutter, but the overall size is slightly smaller than that of the dumbbell-shaped sample.

[0026] When cutting samples, first place the rubber-plastic sheet to be cut and the cutting device on the pad in sequence, start the punching machine and press it downward, the punching head of the punching machine presses hard on the dumbbell-shaped cutter 1, and the rubber-plastic sheet is pressed to cut out a sample with the same shape as the dumbbell-shaped cutter 1. At the same time, the spring 3 is elastically deformed under pressure and generates a reaction force; then, when the punching head of the punching machine is lifted, the reaction force of the spring 3 is transmitted to the ejection plate 4 to automatically eject the sample from the inner cavity of the dumbbell-shaped cutter 1, so as to obtain a dumbbell-shaped sample 6, and the cutting is completed.

[0027] Since the ejection plate 4 is similar in shape to the dumbbell-shaped sample, it can ensure that the sample is uniformly and uniformly ejected from the inner cavity of the dumbbell-shaped cutter 1, avoiding sample damage caused by inconsistent sample force during manual ejection, which affects the test results and improves the quality and accuracy of the sample. In addition, the manual ejection link can be omitted, greatly improving the cutting efficiency.

Claims

1. A rubber and plastic dumbbell-shaped sample cutting device, characterized by: The invention comprises a dumbbell-shaped cutter (1), an ejection support (2), a spring (3), an ejection plate (4) and a fixing screw (5); wherein the dumbbell-shaped cutter (1) has a dumbbell-shaped cavity with at least a lower end open; the ejection support (2) is mounted and fixed on the upper part of the dumbbell-shaped cavity; and the ejection plate (4) is connected to the ejection support (2) via the spring (3) and is mounted on the bottom of the dumbbell-shaped cavity.

2. A rubber and plastic dumbbell-shaped specimen cutting device according to claim 1, characterized in that: The ejector plate (4) is in a dumbbell shape that matches the dumbbell-shaped cavity.

3. A rubber and plastic dumbbell-shaped specimen cutting device according to claim 2, characterized in that: The ejector plate (4) is installed below the ejector support (2) via two symmetrically arranged springs (3).

4. A rubber and plastic dumbbell-shaped sample cutting device according to claim 3, characterized in that: The two springs (3) are respectively located on the dumbbell-shaped ends at both ends of the ejection plate (4).

5. A rubber and plastic dumbbell-shaped sample cutting device according to claim 4, characterized in that: A spring mounting groove is provided on the bottom surface of the ejection support (2); the upper end of the spring (3) is mounted in the mounting groove.

6. A rubber and plastic dumbbell-shaped specimen cutting device according to any one of claims 1 to 5, characterized in that: The ejection plate (4) is lower than the lower surface of the dumbbell-shaped cutting knife (1) in a free state.

7. A rubber and plastic dumbbell-shaped sample cutting device according to claim 6, characterized in that: The ejector support (2), spring (3) and ejector plate (4) are all made of metal; the ejector plate (4) and ejector support (2) are respectively welded to both ends of the spring (3).

8. A rubber and plastic dumbbell-shaped specimen cutting device according to any one of claims 1 to 5 and 7, characterized in that: The dumbbell-shaped cutting knife (1) is made of stainless steel.

9. A rubber and plastic dumbbell-shaped specimen cutting device according to claim 8, characterized in that: The upper port of the dumbbell-shaped cutter (1) is open; the ejection support (2) is in the shape of a dumbbell column, and the upper surface is lower than the upper surface of the dumbbell-shaped cutter (1).

10. A rubber and plastic dumbbell-shaped specimen cutting device according to any one of claims 1-5, 7 and 9, characterized in that: The ejector support (2) and the dumbbell-shaped cutter (1) are fixed together by means of fixing screws (5).

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