Device for preparing rubber compression set test sample

Abstract

The utility model relates to the technical field of tire performance detection, in particular to a device for preparing a rubber compression permanent deformation test sample, which comprises a cutter die cavity, a rotatable driving shaft is arranged in the cutter die cavity from top to bottom in a penetrating manner, and driven shafts penetrating through the bottom of the cutter die cavity are symmetrically arranged on two sides of the driving shaft. A driving gear is arranged on the driving shaft, a driven gear meshed with the driving gear is arranged on the driven shaft, and cutters are arranged at the bottom of the driving shaft and the bottom of the driven shaft. According to the utility model, the bench drilling machine is used for controlling the cutter to carry out automatic mechanical cutting, so that the sample preparation speed is obviously improved, three rubber sample sheets can be prepared at the same time through one-time operation, and compared with a traditional manual grinding mode, the sample preparation time is greatly shortened, and the working efficiency is improved; the size and the shape of each rubber sample can meet the standard requirements through cutting of the cutter, and the precision and the consistency of sample preparation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tire performance detection, in particular to a device for preparing a rubber compression permanent deformation test sample. Background Art

[0002] The rubber compression set test is an important method for evaluating the ability of a rubber material to recover its shape after being subjected to a compressive force and then removed. The specific test method involves placing a standard-sized rubber specimen in a specified compression device, applying a certain compression ratio (usually 25% to 75%), and maintaining the compression ratio at a specified temperature (such as room temperature or high temperature) for a specified period of time (e.g., 22 hours, 70 hours, etc.). The compressive force is then removed, and the specimen is allowed to recover under standard conditions for a period of time. The change in thickness or degree of shape recovery is then measured to calculate the compression set.

[0003] During the testing process, preparing standard-sized rubber specimens is a crucial step in permanent deformation testing. Rubber specimens must be flat, defect-free, and meet test requirements. Currently, the preparation of rubber compression permanent specimens from finished tires generally relies on traditional manual operations, primarily relying on workers using a grinding machine for grinding. Manual grinding requires first cutting the specimen into a rough blank with a tool, then grinding it into a standard specimen using a grinding machine. This process is inefficient and time-consuming, failing to meet the needs of rapid testing. It also requires high skills from workers, and any mistakes can result in the specimen being scrapped, increasing costs. Utility Model Content

[0004] In order to solve the deficiencies in the prior art, the utility model provides a device for preparing a rubber compression permanent deformation test specimen.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is: a device for preparing rubber compression permanent deformation test specimens, comprising a cutter mold cavity, wherein a rotatable driving shaft is provided from top to bottom through the cutter mold cavity, and driven shafts are symmetrically provided on both sides of the driving shaft and pass through the bottom of the cutter mold cavity, a driving gear is provided on the driving shaft, and a driven gear meshing with the driving gear is provided on the driven shaft, and cutters are provided at the bottom of both the driving shaft and the driven shaft.

[0006] Furthermore, film sampling ports are symmetrically provided on the side walls of the driving shaft and the driven shaft.

[0007] Furthermore, the film sampling port is a long strip structure, and the film sampling port is arranged below the cutting die cavity.

[0008] Furthermore, one end of the driven shaft is rotatably arranged at the top of the cutting die cavity, and the other end passes through the bottom of the cutting die cavity.

[0009] Furthermore, a driving shaft bearing is provided at the connection between the driving shaft and the cutter mold cavity, and a driven shaft bearing is provided at the connection between the driven shaft and the cutter mold cavity.

[0010] Furthermore, the driving gear and the driven gear are both arranged inside the cutting die cavity.

[0011] Furthermore, the driving shaft is arranged at the center of the cutting die cavity.

[0012] Furthermore, the cutting die cavity comprises a detachably connected die cavity upper cover and a die cavity lower cover.

[0013] Furthermore, the cutting knife is a circular ring structure.

[0014] The beneficial effects achieved by the utility model are:

[0015] 1. The utility model controls the cutter to perform automatic mechanical cutting through a bench-top drilling machine, which significantly improves the sample preparation speed. Three rubber samples can be prepared at the same time in one operation. Compared with the traditional manual grinding method, the sample preparation time is greatly shortened and the work efficiency is improved. The cutter cutting can ensure that the size and shape of each rubber sample meet the standard requirements, thereby improving the accuracy and consistency of sample preparation.

[0016] 2. The traditional manual grinding method has safety hazards. Improper operation of the grinding machine may cause injuries. The utility model reduces the direct contact between the staff and the grinding machine through mechanical operation, thereby improving work safety.

[0017] 3. The utility model has high cutting precision and can accurately control the size and shape of the sample, thereby avoiding material waste and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a sectional view of the overall structure of the utility model.

[0020] Explanation of the marks in the figure: 1. Cutter cavity; 2. Driving shaft; 3. Driven shaft; 4. Driving gear; 5. Driven gear; 6. Driving shaft bearing; 7. Driven shaft bearing; 8. Film sampling port; 9. Cutter; 101. Cavity upper cover; 102. Cavity lower cover. DETAILED DESCRIPTION

[0021] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of a device for preparing a rubber compression permanent deformation test specimen according to the present invention in conjunction with the accompanying drawings.

[0022] like Figures 1 to 2 The figure shows an apparatus for preparing rubber compression set test specimens. The apparatus comprises a cutter mold cavity 1, with a rotatable driving shaft 2 extending through the center of the cutter mold cavity 1. Driving shaft bearings 6 are provided at the junctions between the driving shaft 2 and the top and bottom of the cutter mold cavity 1. Driven shafts 3 are symmetrically provided on either side of the driving shaft 2, extending through the bottom of the cutter mold cavity 1. One end of the driven shaft 3 is rotatably disposed at the top of the cutter mold cavity 1, while the other end extends through the bottom of the cutter mold cavity 1. Driven shaft bearings 7 are provided at the junctions between the driven shaft 3 and the top and bottom of the cutter mold cavity 1. A driving gear 4 is provided on the driving shaft 2, rotating therewith. A driven gear 5 is provided on the driven shaft 3, meshing with the driving gear 4. The driven gear 5 rotates with the driving gear 4, thereby driving the driven shaft 3 to rotate with it. Both the driving gear 4 and the driven gear 5 are disposed within the cutter mold cavity 1. A cutter 9 is provided at the bottom of each of the driving shaft 2 and the driven shaft 3. The cutter 9 is generally annular in structure.

[0023] Film sampling ports 8 are symmetrically arranged on the side walls of the driving shaft 2 and the driven shaft 3. The film sampling ports 8 are long strip structures. The film sampling ports 8 are arranged below the cutter cavity 1. The bottom of the film sampling port 8 is close to the cutter 9. After the cutter 9 cuts out the rubber sample on the tire, the staff can use a rod-shaped tool to pass through the film sampling port 8 to push out the rubber sample.

[0024] The cutter mold cavity 1 is a rectangular structure with a hollow interior as a whole. The cutter mold cavity 1 includes a mold cavity upper cover 101 and a mold cavity lower cover 102 that are detachably connected to each other. A driving shaft 2 through-hole is provided at the center of the mold cavity upper cover 101, and a driving shaft bearing 6 is provided in the driving shaft 2 through-hole. The top of the mold cavity upper cover 101 is symmetrically provided with driven shaft 3 grooves on both sides of the driving shaft 2 through-hole, and a driven shaft bearing 7 is provided in the driven shaft 3 groove; the mold cavity lower cover 102 is respectively provided with a driving shaft 2 through-hole and a driven shaft 3 through-hole, and the driving shaft 2 through-hole and the driven shaft 3 through-hole are respectively provided with a driving shaft bearing 6 and a driven shaft bearing 7.

[0025] During use, a worker first cuts a rubber sheet of standard thickness from a finished tire and places the rubber sheet on the table of a bench drill press. The worker then connects the driving shaft 2 of the device to the bench drill press and the power output shaft of the bench drill press. The bench drill press is then started, which drives the driving shaft 2 to rotate, causing the driving gear 4 on the driving shaft 2 to rotate, which in turn drives the driven gear 5 to rotate. The driven gear 5 then drives the driven shaft 3. The driving gear 4 and the driven gear 5 are of the same size and model, and the driving shaft 2 and the driven shaft 3 rotate at the same speed, causing the three cutters 9 at the bottom to rotate at the same speed. The machine tool is then controlled to move the device downward toward the rubber sheet on the table. The cutters 9 drill out a standard-sized rubber sample from the rubber sheet. Finally, the worker uses a rod-shaped tool to eject the rubber sample through the film sampling port 8. The device can prepare three rubber samples at a time, enabling rapid sampling of rubber sheets cut from finished tires.

[0026] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A device for preparing rubber compression set test specimens, characterized by: The invention comprises a cutting die cavity (1), wherein a rotatable driving shaft (2) is provided through the cutting die cavity (1) from top to bottom, and driven shafts (3) are symmetrically provided on both sides of the driving shaft (2) and pass through the bottom of the cutting die cavity (1), a driving gear (4) is provided on the driving shaft (2), and a driven gear (5) meshing with the driving gear (4) is provided on the driven shaft (3), and cutting knives (9) are provided at the bottom of both the driving shaft (2) and the driven shaft (3).

2. The device for preparing a rubber compression set test specimen according to claim 1, characterized in that: Film sampling ports (8) are symmetrically provided on the side walls of the driving shaft (2) and the driven shaft (3).

3. The device for preparing a rubber compression set test specimen according to claim 2, characterized in that: The film sampling port (8) is a long strip structure, and the film sampling port (8) is arranged below the cutting die cavity (1).

4. The device for preparing a rubber compression set test specimen according to claim 1, wherein: One end of the driven shaft (3) is rotatably arranged at the top of the cutter mold cavity (1), and the other end passes through the bottom of the cutter mold cavity (1).

5. The device for preparing a rubber compression set test specimen according to claim 4, characterized in that: A driving shaft bearing (6) is provided at the connection between the driving shaft (2) and the cutting die cavity (1), and a driven shaft bearing (7) is provided at the connection between the driven shaft (3) and the cutting die cavity (1).

6. The device for preparing a rubber compression set test specimen according to claim 1, characterized in that: The driving gear (4) and the driven gear (5) are both arranged inside the cutting die cavity (1).

7. The device for preparing a rubber compression set test specimen according to claim 1, characterized in that: The driving shaft (2) is arranged at the center of the cutting die cavity (1).

8. The device for preparing a rubber compression set test specimen according to claim 1, characterized in that: The cutting die cavity (1) comprises a detachably connected die cavity upper cover (101) and a die cavity lower cover (102).

9. The device for preparing a rubber compression set test specimen according to claim 1, characterized in that: The cutting knife (9) is a circular ring structure.

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