Sampling device for tensile resistance test of waterproof coiled material

Abstract

A waterproof roll tensile resistance test sampling device comprises a sheet punching device, the sheet punching device comprises a fixing plate and a lifting plate arranged below the fixing plate, the lifting plate is provided with a bottom plate, the middle of the bottom plate is provided with a sheet punching groove matched with a die, and the sheet punching groove is used for avoiding a cutting edge at the lower end of the die; a limiting column is arranged at the top of the die, and a limiting groove matched with the limiting column is formed in the bottom of the fixing plate and used for locating the die above the punching sheet groove. According to the sampling device for the tensile resistance test of the waterproof coiled material, the punching sheet groove is formed, so that the cutting edge of the mold is not in contact with the bottom plate, the loss rate of the mold is reduced, and the utilization rate of the mold is improved; meanwhile, the protrusions can prevent the punching area from collapsing, and cutting is more thorough during punching.

Description

Technical Field

[0001] The utility model relates to the technical field of waterproof coiled material detection, in particular to a waterproof coiled material tensile force test sampling device. Background Art

[0002] Before conducting a tensile test on waterproof membranes, it is necessary to take strips of waterproof membranes for testing. The current sampling method is to use a hydraulic punching machine with a sampling mold A to punch the membranes, such as Figure 1 As shown, the folded sample is punched out to form multiple samples at one time, such as Figure 2 As shown, the lower end of mold A is a cutting edge, which is convenient for cutting samples; however, due to the different thickness of samples, it is difficult to control the stroke of each punching. If the stroke is too short, it cannot be completely cut. If the stroke is too long, it will cause the cutting edge of mold 1 to be squeezed with the lifting platform B, damaging the cutting edge. The current solution is to place a plastic plate C on the lifting platform B so that mold A acts on the plastic plate C after punching. However, the above method will still damage the cutting edge, and the plastic plate needs to be replaced frequently. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a waterproof coiled material tensile strength test sampling device which can protect the cutting edge of the mold.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a waterproof membrane tensile test sampling device, including a punching device, the punching device includes a fixed plate and a lifting plate arranged below the fixed plate, the lifting plate is provided with a bottom plate, and a punching groove matching the mold is provided in the middle of the bottom plate, and the punching groove is used to avoid the cutting edge of the lower end of the mold; a limiting column is provided on the top of the mold, and a limiting groove matching the limiting column is provided at the bottom of the fixed plate, which is used to position the mold above the punching groove.

[0005] Preferably, a protrusion is provided in the middle of the punching groove, and the size of the protrusion is the same as the size of the cutout of the mold.

[0006] Preferably, the base plate is fixed on the lifting plate by screws.

[0007] Preferably, the upper surface of the protrusion is flush with the upper surface of the base plate.

[0008] Preferably, the bottom plate is a metal plate.

[0009] Preferably, the depth of the punching groove is not less than 1 cm.

[0010] The utility model provides a sampling device for testing the tensile strength of waterproof coiled materials, in which a punching groove is arranged so that the cutting edge of a mold does not contact a bottom plate, thereby reducing the loss rate of the mold and improving its utilization rate; at the same time, the protrusion can prevent the punching area from collapsing and make the cutting more thorough during punching. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0012] Figure 1 It is a structural schematic diagram of the prior art;

[0013] Figure 2 It is a structural schematic diagram of an existing mold;

[0014] Figure 3 It is a schematic diagram of the structure of the utility model;

[0015] Figure 4 This is a schematic diagram of the installation structure of the bottom plate of the utility model;

[0016] Figure 5 This is a schematic diagram of the installation structure of the mold of the utility model;

[0017] Figure 6 It is a schematic diagram of the structure of the mold and the protrusion of the utility model. DETAILED DESCRIPTION

[0018] like Figure 3-5 As shown, a sampling device for testing the tensile strength of waterproof membranes includes a punching device, wherein the punching device includes a fixed plate 1 and a lifting plate 2 arranged below the fixed plate 1, a bottom plate 3 is provided on the lifting plate 2, a punching groove 4 matched with a mold 5 is provided in the middle of the bottom plate 3, and the punching groove 4 is used to avoid the cutting edge of the lower end of the mold 5; a limiting column 6 is provided on the top of the mold 5, and a limiting groove 7 matched with the limiting column 6 is provided at the bottom of the fixed plate 1, which is used to position the mold 5 above the punching groove 4.

[0019] Preferably, Figure 6 As shown, a protrusion 8 is provided in the middle of the punching slot 4, and the size of the protrusion 8 is the same as the size of the cutout of the mold 5. The protrusion can prevent the punching area from collapsing and make the cutting more thorough when punching.

[0020] Preferably, the bottom plate 3 is fixed on the lifting plate 2 by screws, so that the bottom plate 3 can be easily disassembled and cleaned.

[0021] Preferably, the upper surface of the protrusion 8 is flush with the upper surface of the bottom plate 3 to ensure that the sample is flat during punching.

[0022] Preferably, the bottom plate 3 is a metal plate.

[0023] Preferably, the depth of the punching groove 4 is not less than 1 cm. The cutting edge is prevented from contacting the bottom plate of the punching groove 4.

[0024] When in use, install the bottom plate 3, raise the lifting plate 2 to a suitable height, place the sample to be punched, and install the mold 5 so that the waterproofing membrane is located between the bottom plate and the mold. Then start the hydraulic cylinder to drive the lifting plate 2 to rise, and complete the punching. During the punching process, the punching can be stopped when the cutting edge of the mold enters the punching groove 4.

[0025] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A sampling device for testing the tensile strength of waterproof coiled materials, comprising a punching device, wherein the punching device comprises a fixed plate (1) and a lifting plate (2) arranged below the fixed plate (1), characterized in that: A bottom plate (3) is provided on the lifting plate (2), and a punching groove (4) matching with the mold (5) is provided in the middle of the bottom plate (3), and the punching groove (4) is used to avoid the cutting edge of the lower end of the mold (5); a limiting column (6) is provided on the top of the mold (5), and a limiting groove (7) matching with the limiting column (6) is provided at the bottom of the fixed plate (1), and is used to limit the mold (5) above the punching groove (4).

2. A waterproof coiled material tensile strength test sampling device according to claim 1, characterized in that: A protrusion (8) is provided in the middle of the punching slot (4), and the size of the protrusion (8) is the same as the size of the cutout of the mold (5).

3. A waterproof coiled material tensile strength test sampling device according to claim 1, characterized in that: The bottom plate (3) is fixed on the lifting plate (2) by means of screws.

4. A waterproof coiled material tensile strength test sampling device according to claim 2, characterized in that: The upper surface of the protrusion (8) is flush with the upper surface of the bottom plate (3).

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