Density measuring device for EPP (Expanded Polypropylene) material
By designing a density measuring device for EPP materials, the problems of cumbersome density measurement and reliance on manual labor in the secondary foaming production of EPP were solved, realizing automated measurement and stable production, and improving production efficiency and density stability.
Patent Information
- Application Number
- CN202423133341.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Existing EPP secondary foaming equipment suffers from cumbersome density measurement and reliance on manual operation during the production process, resulting in low production efficiency and large density fluctuations, making it difficult to achieve stable production.
A density measuring device for EPP material was designed, including a density testing chamber, a feeding funnel, a testing measuring cup, a scraper, a particle collection box, and an antistatic device, to achieve automated density measurement, reduce manual intervention, and improve measurement accuracy and production efficiency.
It enables automated density measurement during the secondary foaming process of EPP, reducing human error, improving production efficiency and density stability, and supporting real-time parameter adjustment.
Smart Images
Figure CN223637323U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to density measuring device, in particular to a density measuring device of EPP material. BACKGROUND
[0002] Foamed polypropylene material (abbreviation EPP) is a new material of light weight, environmental protection and use strength, its independent bubble structure makes its use density can reach 10g / L, common application includes automobile, packaging, aerospace, high speed rail, household equipment and other industries, annual consumption can reach 100000 tons.
[0003] EPP material adopts supercritical kettle pressure foaming technology, and general foaming density can reach 40g / l (abbreviation EPP's first foaming, the highest ratio is 15-17P), and the product is used in the occasion that the material use strength requirement is relatively high;And most of the scenes, use is EPP material's two products, and it makes EPP material density can reach minimum 10g / l (abbreviation EPP material's second foaming, the highest ratio can reach 80P) through the method that compressed air and temperature promote bubble growth.
[0004] For the above-mentioned EPP two-stage, due to its density drop, its product volume increases significantly, and the production efficiency of its two-stage is reduced obviously, and the general EPP two-stage device, the single round production efficiency is 3-6kg / round, and the worker needs to monitor the product density during production, and then correct the two-stage production parameters, and the steps are quite cumbersome and repetitive, and the operation quantity of personnel is very high, and if the personnel does not test in time, the density fluctuation of the product two-stage can be greatly affected. INVENTION CONTENTS
[0005] The utility model provides a density measuring device of EPP material for the automatic density measurement of EPP second foaming particle on line, greatly improves the density stability in EPP product two-stage, reduces the error caused by manual measurement, and improves the production efficiency of product as a whole.
[0006] In order to solve the above technical problems, the utility model provides technical scheme as follows: a kind of density measuring device of EPP material, including density test box, and the lower side of density test box top inlet is provided with from top to bottom fall funnel, scraper, test measuring cup and particle collection box, the fall funnel is supported on the support in density test box, the test measuring cup cup mouth is open, and cup bottom is provided with weight induction scale, test measuring cup side is connected with the rotating shaft on the support, and it can overturn with rotating shaft as rotating center line under the driving of rotating motor, the particle collection box top opening is used to receive the EPP particles poured by test measuring cup;The scraper is rotatably connected on the support, and the lower edge of the scraper is flush with the cup mouth of the test measuring cup, so as to scrape the EPP particles higher than the cup mouth in the test measuring cup.
[0007] The rotating motor is arranged on the support, one end of the rotating shaft is connected with the output shaft of the rotating motor, and the other end is connected with the side surface of the test measuring cup.
[0008] Alternatively, the rotating motor is arranged between the rotating shaft and the test measuring cup, and the rotating shaft is fixed on the support.
[0009] The capacity of the test measuring cup is 1L.
[0010] The distance between the bottom of the fall funnel and the cup mouth of the test measuring cup is 30-50cm.
[0011] The top opening of the density test box is connected with a material suction pipeline, a buffer tank is arranged on the material suction pipeline, a fan is arranged on the side surface of the buffer tank, the inlet end of the material suction pipeline is connected with an electrostatic removal device, and the electrostatic removal device is used to remove the static electricity of the EPP particles.
[0012] The electrostatic removal device comprises a pre-mixing barrel and an antistatic diluent barrel, the pre-mixing barrel is in communication with a sampling pipeline, the antistatic diluent barrel stores antistatic diluent, the antistatic diluent barrel is in communication with the pre-mixing barrel through a compressed air pulse device, and the material suction pipeline is connected with the pre-mixing barrel.
[0013] A stirrer is arranged on the top of the pre-mixing barrel, and the paddle of the stirrer extends into the pre-mixing barrel.
[0014] The sampling pipeline is open to a drying box of an EPP secondary foaming device.
[0015] A material taking opening is arranged on the side surface of the density test box.
[0016] The utility model achieves the beneficial effects that the utility model can greatly improve the test amount of EPP secondary foaming density, the process is uniformly controlled, manual intervention is not needed, the density difference caused by human skill can be excluded, when the particle density fluctuates in different production rounds, data support can be provided in time for the adjustment of secondary foaming parameters. Attached Figure Description
[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] In the diagram: 1. Discharge drying box, 2. Sampling pipe, 3. Antistatic liquid dilution tank, 4. Compressed air pulse device, 5. Particle pre-mixing tank, 6. Mixer, 7. Suction pipe, 8. Buffer tank, 9. Density testing chamber, 10. Discharge funnel, 11. Scraper, 12. Test measuring cup, 13. Weight sensor scale, 14. Particle collection box, 15. Rotating shaft, 16. Display screen, 17. Support. Detailed Implementation
[0020] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0021] like Figure 1 As shown, a density measuring device for EPP material mainly includes a density testing chamber 9. A feed inlet is located at the top of the density testing chamber 9, and a discharge funnel 10 is located below the feed inlet to temporarily store the incoming EPP particles and guide them into a test measuring cup 12 below. A weight-sensing scale 13 is installed at the bottom of the test measuring cup 12 to weigh the EPP particles inside. A particle collection box 14 is located below the test measuring cup 12 to collect the tested EPP particles. The discharge funnel 10 and the test measuring cup 12 are respectively supported and connected to a bracket 17. The bracket 17 is vertically arranged inside the density testing chamber 9 and can be fixed to the bottom of the density testing chamber 9 or to the inner wall of the density testing chamber 9. The test measuring cup 12 is connected to a rotating shaft 15, which is used to rotate the test measuring cup 12 180° in the vertical plane, pouring the EPP particles into the particle collection box 14 below. One end of the rotating shaft 15 is fixedly connected to the bracket 17, and the other end is connected to the test measuring cup 12 via a rotary motor. The rotary motor drives the test measuring cup 12 to rotate and flip. Alternatively, one end of the rotating shaft 15 is connected to the bracket 17 via a rotary motor, and the other end is fixedly connected to the test measuring cup 12. The rotary motor drives the rotating shaft 15 and the test measuring cup 12 to rotate together, thereby achieving the flipping and discharge of the test measuring cup 12. A display screen 16 is provided on the outer side of the density testing chamber 9 to display the density value.
[0022] The weight of the EPP particles in the test measuring cup 12 and the volume of the test measuring cup 12 can be used to calculate the density of the EPP particles. Therefore, in order to simplify the calculation process, the volume of the test measuring cup 12 is 1L, so that the weight of a full cup of EPP particles is the value of the particle density of the sample, for example, if the weight of a full cup of EPP particles is Ag, then the corresponding particle density is Ag / L.
[0023] In order to ensure that the volume of the EPP particles in the test measuring cup 12 is equal to the volume of the test measuring cup 12, a scraper 11 is also provided on the support 17, and the height of the scraper 11 is consistent with the height of the cup mouth of the test measuring cup 12. The scraper 11 is rotated in the horizontal plane by the scraper motor on the support 17. When the EPP particles in the feeding hopper 10 fall into the test measuring cup 12 below, the scraper motor drives the scraper 11 to rotate towards the test measuring cup 12, and the EPP particles that are higher than the cup mouth are scraped off to obtain a full cup of EPP particles. After scraping, the scraper motor rotates in the opposite direction to drive the scraper 11 away from the test measuring cup 12 and back to the initial position to avoid blocking the overturning of the test measuring cup 12.
[0024] The rotating motor and the scraper motor are both servo motors to realize rotation at a fixed angle.
[0025] The distance between the lower end outlet of the feeding hopper 10 and the cup mouth of the test measuring cup 12 is 30-50cm to avoid the EPP particles from spilling out due to too large distance.
[0026] In order to more accurately obtain the density of the EPP particles, the sampling is taken from the discharge drying oven 1 of the EPP secondary foaming device during measurement.
[0027] Further, the EPP particles are easy to generate static electricity with the pipeline during the conveying process, which affects the measurement of the density of the EPP particles. Therefore, an anti-static device is also provided, including a particle pre-mixing barrel 5 and an anti-static diluent barrel 3. The anti-static diluent in the anti-static diluent barrel 3 is sprayed into the pre-mixing barrel 5 by the compressed air pulse device 4 multiple times in a small amount, and is fully mixed with the EPP particles under the action of the agitator 6 in the pre-mixing barrel 5 to remove the static electricity of the particles. The agitator 6 is installed on the top of the pre-mixing barrel 5, and the blades of the agitator 6 agitate the EPP particles in the pre-mixing barrel 5.
[0028] The sampling pipeline 2 is arranged between the discharge drying box 1 and the pre-mixing barrel 5, and a sampling pump is arranged in the discharge drying box 1 or on the sampling pipeline 2. When sampling is needed, the EPP particles dried in the discharge drying box 1 are pumped into the pre-mixing barrel 5 by the sampling pump. The suction pipeline 7 is connected between the pre-mixing barrel 5 and the density test box 9, and the buffer tank 8 is arranged at the end of the suction pipeline 7 close to the density test box 9. The fan arranged on the side of the buffer tank 8 generates negative pressure to suck the EPP particles in the pre-mixing barrel 5 into the buffer tank 8 for stabilizing the particle state.
[0029] The working process of the device is as follows: the EPP particles foamed by the EPP secondary foaming device enter the discharge drying box 1 for drying treatment. When sampling and testing the particle density are needed, the EPP particles dried are pumped into the pre-mixing barrel 5 by the sampling pump. The anti-static diluent in the anti-static diluent barrel 3 is sprayed on the EPP particles in the pre-mixing barrel 5 by the compressed air pulse device 4 for multiple times in small amounts, and the EPP particles and the anti-static diluent are fully stirred by the stirrer 6 to remove static electricity. Then, the fan arranged on the side of the buffer tank 8 sucks the EPP particles in the pre-mixing barrel 5 from which static electricity is removed into the buffer tank 8 by negative pressure, and then the EPP particles enter the density test box 9 from the buffer tank 8, fall on the discharge hopper 10, and then fall into the test measuring cup 12 below from the bottom of the discharge hopper 10. Then, the excess particles in the test measuring cup 12 above the cup opening are scraped off by the scraper 11, and the weight of the EPP particles in the test measuring cup 12 is measured by the weight induction scale 13, so that the density of the batch of particles can be obtained. Finally, the test measuring cup 12 is turned over to pour the EPP particles into the particle collecting tank 14 below, and the test measuring cup 12 is turned back to the initial position to wait for the next round of density test.
[0030] It should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or equivalently replace some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. The terms used in the description of the present application are only used to describe the specific embodiments and are not intended to limit the exemplary embodiments according to the present application.
Claims
1. A device for measuring the density of an EPP material, characterized in that, The density test box is provided with a blanking funnel, a scraper, a test measuring cup and a particle collecting box from top to bottom below the top inlet of the density test box, the blanking funnel is supported on a support in the density test box, the test measuring cup is open at the cup mouth and is provided with a weight induction scale at the bottom, one side of the test measuring cup is connected with a rotating shaft on the support and can be turned over with the rotating shaft as the rotating center under the driving of a rotating motor, the particle collecting box is open at the top and is used for receiving the EPP particles poured from the test measuring cup, and the scraper is rotatably connected on the support and is flush with the cup mouth of the test measuring cup at the lower edge to scrape off the EPP particles higher than the cup mouth in the test measuring cup.
2. The density measurement device of claim 1, wherein, The rotating motor is arranged on the support, one end of the rotating shaft is connected with the output shaft of the rotating motor, and the other end is connected with the side of the test measuring cup.
3. The density measurement device of claim 1, wherein, The rotating motor is arranged between the rotating shaft and the test measuring cup, and the rotating shaft is fixed on the support.
4. The density measurement device of claim 1, wherein, The capacity of the test measuring cup is 1L.
5. The density measurement device of claim 1, wherein, The distance between the bottom of the blanking funnel and the cup mouth of the test measuring cup is 30-50cm.
6. The density measurement device of claim 1, wherein, The top opening of the density test box is connected with a material suction pipeline, the material suction pipeline is provided with a buffer tank, a fan is arranged on the side of the buffer tank, the inlet end of the material suction pipeline is connected with an electrostatic removal device, and the electrostatic removal device is used for removing the static electricity of the EPP particles.
7. The density measuring apparatus of claim 6, wherein The electrostatic removal device comprises a pre-stirring barrel and an anti-static diluent barrel, one side of the pre-stirring barrel is communicated with a sampling pipeline, the anti-static diluent barrel stores anti-static diluent, the anti-static diluent barrel is communicated with the pre-stirring barrel through a compressed air pulse device, and the material suction pipeline is connected with the pre-stirring barrel.
8. The density measurement device of claim 7, wherein, A stirrer is arranged on the top of the pre-stirring barrel, and the paddle of the stirrer extends into the pre-stirring barrel.
9. The density measurement device of claim 7, wherein, The sampling pipeline is open to a drying box of an EPP secondary foaming device.
10. The density measurement device of claim 7, wherein, A material taking opening is arranged on the side of the density test box.