Cutting device for plastic detection wafer samples

Abstract

The application discloses a cutting device for plastic detection wafer samples, and the cutting work platform of the device is fixedly connected above the base through the side plate, slide rails are arranged on the two sides of the base, the walking seat is arranged above the cutting work platform and connected with the linear bearings on the slide rails, the screw rod seat is arranged at the tail end of the cutting work platform, the screw rod is screwed into the screw rod seat and movably connected with the walking seat at the front end, the sample groove is arranged in the walking seat, the pressing block is arranged in the sample groove, the pressing bolt is screwed into the screw hole in the top surface of the sample groove and movably connected with the pressing block at the bottom end, the vertical plate is vertically arranged at the front end of the base, the first horizontal plate is arranged at the top end of the vertical plate, the rack is arranged on the side surface of the vertical plate above the base through the dovetail groove, and the cutting blade is arranged on the motor rotating shaft. The device can conveniently and accurately process and prepare the detection samples meeting the detection standard requirements.

Description

Technical Field

[0001] This invention relates to the field of testing and inspection technology, and in particular to a cutting device for testing thin sheet samples of plastics. Background Technology

[0002] The thermal stability of plastics refers to their ability to withstand thermal shock without breaking down. In chemistry, it refers to the ease with which a chemical reaction occurs under certain conditions. The thermal stability of plastics represents their ability to effectively prevent, reduce, or even stop degradation. The higher the energy required to break down a plastic, the more stable it is. Differential scanning calorimetry (DSC) is currently the most widely used method for testing the thermal stability of plastics. It typically measures the time or temperature required for the antioxidant stabilizing system in a sample to inhibit oxidation, under a specified temperature and constant heating rate, in an oxygen or air atmosphere. Oxidation induction time or oxidation induction temperature is a means of evaluating the stability level (or degree) of the tested material. Higher test temperatures result in shorter oxidation induction times; faster heating rates also lead to higher oxidation induction temperatures. Oxidation induction time and oxidation induction temperature are directly related to the surface area of ​​the sample exposed to oxidation.

[0003] The differential scanning calorimetry (DSC) testing standard specifies a sample thickness of (650±100) μm, requiring uniform thickness, parallel, flat, and burr-free surfaces. The specific surface area of ​​the sample, sample inhomogeneity, and residual stress all significantly affect the experimental results. In actual testing, the final sample form is generally a pipe. The outer and inner surfaces of plastic pipes, exposed to air, have already oxidized, and the curved surface of the pipe increases the surface area. A thin slice of (650±100) μm must be uniformly cut from the exposed surface layer of the pipe to obtain the final sample. Therefore, the sample thickness requirement is high; manual cutting accuracy is difficult to meet the testing requirements, while large-scale machining is time-consuming, labor-intensive, and extremely costly. Currently, there is no suitable cutting device for DSC testing samples in the industry. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a cutting device for plastic testing sheet samples. The device has a simple structure, is easy to use, accurate in processing, safe and reliable, and can conveniently and accurately process and prepare test samples that meet the requirements of differential scanning calorimetry testing standards.

[0005] To solve the above-mentioned technical problems, the present invention provides a cutting device for plastic sheet samples, comprising a base, a cutting platform, a traveling seat, a sample slot, a clamping block, a clamping bolt, a lead screw, a lead screw seat, a vertical plate, a motor, a blade position adjusting bolt, and a cutting blade. The cutting platform is located above the base and is fixedly connected via side plates. Slide rails are provided on both sides of the base via fixed seats, and linear bearings are mounted on the slide rails. The traveling seat is located above the cutting platform and connected to the linear bearings on both sides. The lead screw seat is located at the tail end of the cutting platform, and the lead screw is screwed into the lead screw seat and its front end is movably connected to the traveling seat. The sample groove is located inside the traveling seat, the clamping block is located inside the sample groove, the top surface of the sample groove is provided with a screw hole, the clamping bolt is screwed into the screw hole on the top surface of the sample groove and its bottom end is movably connected to the clamping block, the upright plate is vertically provided at the front end of the base, the top of the upright plate is provided with a first horizontal plate, the side of the motor is provided with a frame, the top of the frame is provided with a second horizontal plate, the first horizontal plate is provided with a screw hole, the blade position adjusting bolt is screwed into the screw hole of the first horizontal plate and its bottom end is movably connected to the second horizontal plate, the frame is provided on the upper side of the upright plate through a dovetail groove, and the cutting blade is provided on the motor shaft.

[0006] Furthermore, the device also includes a tool positioning bolt. The upper side of the upright plate is provided with a screw hole. The tool positioning bolt is screwed into the screw hole on the upper side of the upright plate and its bottom end abuts against the frame.

[0007] Furthermore, a rotating handle is provided at the tail end of the lead screw.

[0008] Because the cutting device for plastic sheet samples of this invention adopts the above-mentioned technical solution, namely, the cutting platform of this device is located above the base and is fixedly connected by side plates, the base is provided with slide rails on both sides, and linear bearings are provided on the slide rails, the traveling seat is located above the cutting platform and is connected to linear bearings on both sides, the lead screw seat is located at the tail end of the cutting platform, the lead screw is screwed into the lead screw seat and the front end is movably connected to the traveling seat, the sample slot is located in the traveling seat, the clamping block is located in the sample slot, the top surface of the sample slot is provided with screw holes, the clamping bolt is screwed into the screw holes on the top surface of the sample slot and the bottom end is movably connected to the clamping block, the upright plate is vertically located at the front end of the base, the top of the upright plate is provided with a first horizontal plate, the side of the motor is provided with a frame, the top of the frame is provided with a second horizontal plate, the first horizontal plate is provided with screw holes, the blade position adjusting bolt is screwed into the screw holes of the first horizontal plate and the bottom end is movably connected to the second horizontal plate, the frame is located on the upper side of the upright plate through a dovetail groove, and the cutting blade is located on the motor shaft. This device has a simple structure, is easy to use, accurate in processing, safe and reliable, and can conveniently and accurately process and prepare test samples that meet the requirements of differential scanning calorimetry detection standards. Attached Figure Description

[0009] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0010] Figure 1 This is a schematic diagram of the cutting device for plastic sheet samples for testing according to the present invention;

[0011] Figure 2 This is a plan view of the device;

[0012] Figure 3 This is a schematic diagram showing the connection of the traveling seat, sample tank and clamping block in this device;

[0013] Figure 4 This is a schematic diagram showing the placement of thin slices during sample cutting using this device. Detailed Implementation

[0014] Implementation, for example Figure 1 , Figure 2 and Figure 3 As shown, the cutting device for plastic sheet samples of the present invention includes a base 1, a cutting platform 2, a traveling seat 3, a sample groove 4, a clamping block 5, a clamping bolt 6, a lead screw 7, a lead screw seat 8, a vertical plate 9, a motor 91, a blade position adjusting bolt 92, and a cutting blade 93. The cutting platform 2 is located above the base 1 and is fixedly connected by a side plate 21. The base 1 has slide rails 12 on both sides via fixed seats 11, and linear bearings 13 are mounted on the slide rails 12. The traveling seat 3 is located above the cutting platform 2 and is connected to the linear bearings 13 on both sides. The lead screw seat 8 is located at the tail end of the cutting platform 2. The lead screw 7 is screwed into the lead screw seat 8 and its front end is movably connected to the traveling seat 3. The sample groove 4 is located inside the traveling seat 3, the clamping block 5 is located inside the sample groove 4, the top surface of the sample groove 4 is provided with a screw hole, the clamping bolt 6 is screwed into the screw hole on the top surface of the sample groove 4 and its bottom end is movably connected to the clamping block 5, the upright plate 9 is vertically provided at the front end of the base 1, the top of the upright plate 9 is provided with a first horizontal plate 94, the side of the motor 91 is provided with a frame 95, the top of the frame 95 is provided with a second horizontal plate 96, the first horizontal plate 94 is provided with a screw hole, the blade position adjusting bolt 92 is screwed into the screw hole of the first horizontal plate 96 and its bottom end is movably connected to the second horizontal plate 96, the frame 95 is provided on the upper side of the upright plate 9 through a dovetail groove 97, and the cutting blade 93 is provided on the rotating shaft of the motor 91.

[0015] Preferably, the device further includes a tool positioning bolt 98. The upper side of the upright plate 9 has a screw hole, and the tool positioning bolt 98 is screwed into the screw hole on the upper side of the upright plate 9, with its bottom end abutting against the frame 95. Because there is a certain gap between the dovetail groove between the frame and the upright plate, the tool positioning bolt is used to fix the frame. When cutting the sample, tightening the tool positioning bolt secures it to the frame, preventing motor vibration and ensuring the cutting accuracy of the sample.

[0016] Preferably, the lead screw 7 is provided with a rotating handle 71 at its tail end. The rotating handle facilitates the rotation of the lead screw and improves the efficiency of the sample cutting operation.

[0017] During the sample cutting operation, first take a section of pipe and cut a thin sheet containing an outer and inner circular surface radially; for example... Figure 4 As shown, the sheet 10 is then placed between the clamping block 5 and the cutting platform 2, with its outer surface abutting against the clamping block 5 and its inner surface abutting against the cutting platform 2. The clamping bolt 6 is tightened to press the sheet against the clamping block 5. The screw 7 is rotated to push the travel seat 3 forward. The travel seat 3 moves forward along the slide rail 12 via the linear bearing 13 to the cutting blade 93 near the shaft of the motor 91. The blade position adjusting bolt 92 is turned to position the cutting blade 93 in a suitable position between the clamping block 5 and the cutting platform 2. The motor 91 is started, and the screw 7 is rotated to move the travel seat 3 forward along with the pressed sheet. The cutting blade... 93 performs the first cut on the thin sheet. After the cut is completed, the travel seat 3 is disengaged by the lead screw 7, the motor 91 is paused, the clamping bolt 6 is loosened and the thin sheet is taken out. The cut segment including the outer circular surface is discarded. The remaining cut segment is flipped over, with the flat surface against the cutting work platform 2 and the inner circular surface against the clamping block 5. The clamping bolt 6 is tightened to clamp the remaining cut segment. The blade position adjusting bolt 92 is turned so that the distance between the cutting blade 93 and the cutting work platform 2 is the required thickness of the sample. The above cutting process is repeated to cut the thin sheet again, so that the sample 20 with the required thickness and fresh cut surfaces on all surfaces can be obtained.

[0018] This device has good versatility and is easy to operate. It has adjustable cutting thickness and can easily and accurately process and prepare test samples for the differential scanning calorimetry method to measure oxidation induction time, so as to reflect the oxidation induction time of plastic pipes in a true and objective way.

Claims

1. A cutting device for testing thin sheet samples of plastic, characterized in that: This device includes a base, a cutting platform, a traveling seat, a sample holder, a clamping block, clamping bolts, a lead screw, a lead screw seat, a vertical plate, a motor, a tool position adjusting bolt, and a cutting blade. The cutting platform is located above the base and is fixedly connected via side plates. The base has slide rails on both sides via fixed seats, and linear bearings are mounted on the slide rails. The traveling seat is located above the cutting platform and connected to the linear bearings on both sides. The lead screw seat is located at the tail end of the cutting platform. The lead screw is screwed into the lead screw seat and its front end is movably connected to the traveling seat. The sample holder is located on the traveling seat. Inside, the clamping block is located in the sample groove. The top surface of the sample groove is provided with a screw hole. The clamping bolt is screwed into the screw hole on the top surface of the sample groove and its bottom end is movably connected to the clamping block. The upright plate is vertically arranged at the front end of the base. The top of the upright plate is provided with a first horizontal plate. The side of the motor is provided with a frame. The top of the frame is provided with a second horizontal plate. The first horizontal plate is provided with a screw hole. The blade position adjusting bolt is screwed into the screw hole of the first horizontal plate and its bottom end is movably connected to the second horizontal plate. The frame is arranged on the upper side of the upright plate through a dovetail groove. The cutting blade is arranged on the motor shaft.

2. The cutting device for plastic testing sheet samples according to claim 1, characterized in that: The device also includes a tool positioning bolt. The upper side of the upright plate is provided with a screw hole. The tool positioning bolt is screwed into the screw hole on the upper side of the upright plate and its bottom end abuts against the frame.

3. The cutting device for plastic testing sheet samples according to claim 1 or 2, characterized in that: The lead screw is equipped with a rotating handle at its tail end.

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