Glossmeter for modified polypropylene particles

Abstract

The invention discloses a glossmeter for modified polypropylene particles, and relates to the technical field of modified polypropylene particle production, the glossmeter comprises a coaxial light-transmitting base, the coaxial light-transmitting base comprises an inner-layer light-transmitting cylinder core installed in the coaxial light-transmitting base, the inner-layer light-transmitting cylinder core is of a cylinder-shaped structure with two open ends, and the inner-layer light-transmitting cylinder core is provided with an outer-layer light-transmitting cylinder core. The inner-layer light-transmitting cylinder core is coaxially nested in the outer-layer main air chamber, a connecting flange is integrally fixed to the bottom end of the outer-layer main air chamber, and an annular tangential air path is arranged in the outer-layer main air chamber. The glossmeter for the modified polypropylene particles is specially designed for the spherical modified polypropylene particles, the technical defects that an existing universal glossmeter is large in measuring area and cannot be matched with a small-size arc-shaped measured object are overcome, the non-contact suspension and rotation design is adopted, a modified layer on the surface of the modified polypropylene particles can be effectively protected, and the glossmeter has the advantages of being simple in structure and convenient to use. The method is suitable for laboratory off-line detection and production line on-line continuous detection of various modified polypropylene spherical particles, and is extremely high in applicability.

Description

Technical Field

[0001] This invention relates to the field of modified polypropylene granule production technology, specifically to a gloss meter for modified polypropylene granules. Background Technology

[0002] Polypropylene, as a general-purpose thermoplastic, is widely used in chemical, automotive, packaging, and building materials industries due to its lightweight, good mechanical properties, and excellent processability. To further optimize the heat resistance, rigidity, and surface properties of polypropylene, the industry commonly modifies it through physical blending and chemical grafting. As a core processing raw material, the surface gloss of modified polypropylene granules is an important physical performance indicator for measuring the surface modification effect of the product and adapting it to subsequent molding processes. It directly affects the appearance quality and user experience of the final product. Therefore, accurate detection of the surface gloss of modified polypropylene granules has significant industrial application value.

[0003] Currently, the equipment used in the industry to test the surface gloss of materials is mainly general-purpose gloss meters. These instruments are all designed based on the principle of specular reflection of surface light and generally adopt a swath contact measurement method. Their detection window has a large measurement spot area and is suitable for testing flat surfaces. They have good detection results when testing large-sized flat materials such as sheets, films, and blocks. However, when applied to the specific detection object of spherical modified polypropylene particles, due to the inherent limitations of the instrument structure and measurement principle, there are many intractable technical defects that cannot meet the requirements for accurate detection. The specific problems are as follows: Firstly, the measurement area of ​​a general-purpose gloss meter is large, which is not suitable for the detection requirements of small spherical particles. Modified polypropylene particles are mostly spherical structures in the micrometer to millimeter range, while the detection spot of a general-purpose gloss meter is usually in the square centimeter range. During measurement, the spot will cover multiple particles, gaps between particles, or stacked areas at the same time, making it impossible to achieve precise focused detection of a single particle. The measurement result is only a statistical average of multiple particles, which cannot reflect the true surface gloss characteristics of a single modified polypropylene particle. In addition, the detection repeatability is poor, and the data reference value is low.

[0004] Secondly, general-purpose gloss meters cannot meet the specular reflection testing requirements of curved test objects. Gloss testing has strict standards for the angle between incident and reflected light, requiring the test surface to be a flat plane. However, the surface of spherical modified polypropylene particles is a continuous curved surface. After the incident light is irradiated, non-specular scattering and reflection light path deviation will occur. The reflected light cannot enter the detector at the standard angle, resulting in weak detection signals, large data fluctuations, or even failure to collect effective detection signals, making it impossible to complete normal gloss measurement.

[0005] Third, the contact measurement method of general-purpose gloss meters can cause multiple interferences to spherical modified polypropylene particles. Such instruments require the detection window to be in close contact with the surface of the object being tested. However, spherical particles are prone to rolling and displacement, making it difficult to maintain a stable position. At the same time, the contact pressure can easily cause particle deformation, breakage, or even damage to the modified layer on the particle surface, causing the test results to deviate from the original surface state of the particles. In addition, the contact process can also easily cause changes in the particle stacking state, further exacerbating the distortion of the test data.

[0006] To address the aforementioned issues, some testing personnel have attempted to use methods such as clamping and manual placement to assist in the measurement of spherical particles. However, these methods are cumbersome and inefficient, and can only alleviate the particle rolling problem to a certain extent. They cannot fundamentally solve the core defects such as measurement area mismatch, optical path offset of curved surfaces, and interference from contact measurements, and still cannot achieve accurate detection of the gloss of spherical modified polypropylene particles.

[0007] In summary, the existing general-purpose gloss meters are all designed around large-size flat materials and lack a specialized design for spherical modified polypropylene particles. They can no longer meet the actual needs of gloss testing of modified polypropylene particle surfaces. The industry urgently needs a dedicated gloss meter designed specifically for spherical modified polypropylene particles to solve the technical defects of general-purpose gloss meters, such as large measurement area and inability to adapt to small-size curved test objects. At the same time, it should avoid various interferences caused by contact measurement and achieve non-contact, accurate and repeatable detection of gloss on the surface of modified polypropylene particles. Summary of the Invention

[0008] The purpose of this invention is to provide a gloss meter for modified polypropylene particles to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a gloss meter for modified polypropylene granules, comprising a coaxial light-transmitting base, wherein the coaxial light-transmitting base includes an inner light-transmitting core installed inside, the inner light-transmitting core being a cylindrical structure with open ends, and the inner light-transmitting core being coaxially nested inside an outer main air chamber, and a connecting flange integrally fixed at the bottom end of the outer main air chamber, wherein an annular tangential air passage is provided inside the outer main air chamber, and the tangential outlet at the top of the tangential air passage is lower than the end plane of the inner light-transmitting core, and the bottom side end of the tangential air passage is connected to the outlet end of a high-pressure air pump through an air source interface, a guide groove is recessed in the outer periphery of the outer main air chamber, and bypass ports are arrayed in the inner wall of the outer main air chamber, and the outlet end of the bypass port is connected to the guide groove, and a one-way valve core controlled by a spring elasticity is installed inside the bypass port to control the opening and closing of the bypass port outlet end.

[0010] Furthermore, a bowl-shaped hemisphere is seamlessly connected to the top of the outer main air chamber, and spherical particles are placed inside the bowl-shaped hemisphere. The inner diameter of the bowl-shaped hemisphere is slightly larger than the outer diameter of the spherical particles, and there is an annular slit between the inner diameter of the bowl-shaped hemisphere and the outer diameter of the spherical particles.

[0011] Furthermore, the tangential airflow output from the tangential air path diffuses evenly along the inner arc of the bowl-shaped hemisphere to the annular slit and is blown out radially at high speed. The uniform annular low-pressure zone formed by the annular slit between the inner diameter of the bowl-shaped hemisphere and the outer diameter of the spherical particle compresses the spherical particle at the center of the opening of the bowl-shaped hemisphere to achieve three-dimensional stable suspension.

[0012] Furthermore, the top of the inner light-transmitting cylinder core is precisely aligned with the spherical measurement area of ​​the spherical particle suspended in the center of the bowl-shaped hemisphere opening, and the internal light path of the inner light-transmitting cylinder core is physically isolated from the tangential air path inside the outer main air chamber to avoid mutual interference.

[0013] Furthermore, a retainer is fixed to the outer edge of the opening of the bowl-shaped hemisphere, and a directional rotation component is snapped into the groove inside the retainer.

[0014] Furthermore, the directional rotation assembly includes a tangential air blowing pipe that is snapped into the groove inside the retainer. The tangential airflow output from the tangential air blowing pipe is blown out at high speed along the tangential direction to directly impact the outer side of the equatorial plane of the suspended spherical particles, causing them to rotate uniformly around a vertical axis coaxial with the inner light-transmitting cylinder core. Moreover, the flow rate and pressure of the tangential airflow output from the tangential air blowing pipe are much smaller than the main suspended airflow output from the tangential air path to avoid disrupting the suspension balance of the spherical particles.

[0015] Furthermore, the directional rotation assembly also includes a connecting pipe connected to the tangential air blowing pipe. A handle is fixedly connected to the outer wall of the connecting pipe, and a slider is fixedly connected to the end of the connecting pipe opposite to the tangential air blowing pipe. The slider slides circumferentially along the guide groove provided on the outer periphery of the outer main air chamber, and an installation cavity is provided inside the slider. A trigger ball controlled by spring elasticity is installed inside the installation cavity, and when the slider slides along the guide groove to a preset position, the trigger ball squeezes the one-way valve core to realize the on / off control of the bypass port and the tangential air blowing pipe.

[0016] Furthermore, the outer main air chamber is installed on the machine body, and a touch screen is provided on the front of the machine body. The top center of the machine body has a recessed mounting notch, which is fixed to the connecting flange bolt at the bottom of the outer main air chamber. An optical detection window is provided at the bottom center of the mounting notch, and the optical detection window is perpendicularly connected to the internal light path of the inner light-transmitting cylinder core.

[0017] Furthermore, a bracket is installed inside the body, and a light source generating device is installed on one side of the bracket. The light source generating device includes a generating cylinder installed on one side of the bracket. The generating cylinder is connected to a first gloss sensor, and a condensing curved mirror is installed at the bottom inside the generating cylinder. A light source bulb is installed inside the condensing curved mirror, and a first double-sided convex lens is installed in the opening direction of the condensing curved mirror. A frosted glass is installed on the first double-sided convex lens along the light path direction, and a second double-sided convex lens is installed on the frosted glass along the light path direction.

[0018] Furthermore, a light source receiving device is installed on the other side of the bracket. The light source receiving device includes a receiving tube installed on the other side of the bracket. A second gloss sensor is installed at the bottom of the receiving tube, and a third double-sided convex lens is installed on the second gloss sensor along the light path direction.

[0019] This invention provides a gloss meter for modified polypropylene granules, which has the following beneficial effects; 1. This application is specifically designed for spherical modified polypropylene particles, which solves the technical defects of existing general-purpose gloss meters, such as large measurement area and inability to adapt to small-sized arc-shaped test objects. Moreover, the non-contact suspension and rotation design can effectively protect the modified layer on the surface of the modified polypropylene particles. It is suitable for laboratory offline testing and production line online continuous testing of various types of modified polypropylene spherical particles, and has extremely strong applicability.

[0020] 2. This application utilizes Bernoulli's principle to create a low-pressure zone through high-speed airflow in an annular slit, compressing spherical particles into the center of a bowl-shaped hemisphere without contact, achieving three-dimensional suspension. This avoids the problems of particle rolling, deformation, and damage to the surface modification layer in traditional contact measurements, ensuring that the detection data reflects the original surface state of the particles. The suspension process is free from any mechanical clamps, significantly improving the repeatability and accuracy of the measurement results. Furthermore, the tangential air paths of the inner transparent core and the outer main air chamber adopt a coaxial nested physical isolation design. The optical detection light path passes through the inner transparent core, while the suspension and rotation air paths are located in the outer annular area. The two are completely independent of each other, avoiding the influence of airflow disturbance and air chamber structure obstruction on the light path. Moreover, the optical detection window is perpendicularly connected to the inner transparent core, ensuring an unobstructed and unoffset light path that is precisely aligned with the spherical measurement area of ​​the particles, guaranteeing the transmission stability of incident and reflected light, and improving the accuracy of gloss detection.

[0021] 3. This application utilizes a mechanically linked directional rotation component to achieve precise on / off control of the tangential airflow path. The tangential airflow impacts the equatorial surface of the particle, causing it to rotate uniformly around a coaxial vertical axis. Furthermore, the rotational airflow parameters are significantly smaller than those of the suspended airflow, thus preserving the suspension balance. During particle rotation, the detection optical path can continuously detect multiple areas of the spherical surface, overcoming the limitation of existing technologies that can only measure the contact surface between the particle and the detection window, failing to reflect the overall gloss characteristics of the particle. This results in more representative detection data. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention; Figure 2 This is a cross-sectional view of the device of the present invention; Figure 3 This is a schematic diagram of the combined structure of the bowl-shaped hemisphere, the inner light-transmitting cylindrical core, and the outer main air chamber of the present invention. Figure 4 This is a schematic diagram of the separate structure of the bowl-shaped hemisphere, the inner light-transmitting core, and the outer main air chamber of the present invention; Figure 5 This is a schematic cross-sectional view of the directional rotation component of the present invention; Figure 6 This is a schematic diagram of the longitudinal cross-sectional structure of the coaxial light-transmitting base of the present invention; Figure 7 This is a schematic diagram of the light source generating device of the present invention; Figure 8 This is a schematic diagram of the structure of the light source receiving device of the present invention.

[0023] In the diagram: 1. Coaxial light-transmitting base; 101. Inner light-transmitting core; 102. Outer main air chamber; 103. Connecting flange; 104. Tangential air passage; 105. Air source interface; 106. Guide groove; 107. Bypass port; 108. One-way valve core; 2. Bowl-shaped hemisphere; 3. Spherical particles; 4. Cage; 5. Directional rotation assembly; 501. Tangential air blowing pipe; 502. Connecting pipe; 503. Handle; 504. Slider; 505. Mounting cavity; 506. Trigger ball; 6. 1. Body; 7. Touch screen; 8. Mounting notch; 9. Optical inspection window; 10. Bracket; 11. Light source generating device; 1101. Generating cylinder; 1102. First gloss sensor; 1103. Condensing curved mirror; 1104. Light source bulb; 1105. First double-sided convex lens; 1106. Frosted glass; 1107. Second double-sided convex lens; 12. Light source receiving device; 1201. Receiving cylinder; 1202. Second gloss sensor; 1203. Third double-sided convex lens. Detailed Implementation

[0024] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention. Please see Figures 1 to 6This invention provides a technical solution: a gloss meter for modified polypropylene granules, comprising a coaxial light-transmitting base 1, the coaxial light-transmitting base 1 including an inner light-transmitting core 101 installed inside, the inner light-transmitting core 101 being a cylindrical structure open at both ends, and the inner light-transmitting core 101 being coaxially nested inside an outer main air chamber 102, and a connecting flange 103 integrally fixed to the bottom end of the outer main air chamber 102, the outer main air chamber 102 having an annular tangential air passage inside. 104, and the tangential outlet at the top of the tangential air passage 104 is lower than the end plane of the inner light-transmitting cylinder core 101, and the bottom side of the tangential air passage 104 is connected to the outlet of the high-pressure air pump through the air source interface 105. The outer main air chamber 102 has a guide groove 106 recessed on its outer periphery, and the inner wall of the outer main air chamber 102 has an array of bypass ports 107, and the outlet end of the bypass port 107 is connected to the guide groove 106. Moreover, a spring-loaded spring is installed inside the bypass port 107. The one-way valve core 108 for sex control is used to control the opening and closing of the bypass port 107 outlet. The top of the outer main air chamber 102 is seamlessly connected to a bowl-shaped hemisphere 2, and spherical particles 3 are placed inside the bowl-shaped hemisphere 2. The inner diameter of the bowl-shaped hemisphere 2 is slightly larger than the outer diameter of the spherical particles 3, and there is an annular slit between the inner diameter of the bowl-shaped hemisphere 2 and the outer diameter of the spherical particles 3. The tangential airflow output from the tangential air passage 104 diffuses evenly along the arc-shaped inner wall of the bowl-shaped hemisphere 2 to the annular slit and radially... High-speed blowing, and the uniform annular low-pressure zone formed by the annular slit between the inner diameter of the bowl-shaped hemisphere 2 and the outer diameter of the spherical particle 3 squeezes the spherical particle 3 to the center of the opening of the bowl-shaped hemisphere 2 to achieve three-dimensional stable suspension. The top of the inner light-transmitting core 101 is precisely aligned with the spherical measurement area of ​​the spherical particle 3 suspended at the center of the opening of the bowl-shaped hemisphere 2, and the internal light path of the inner light-transmitting core 101 is physically isolated from the internal tangential air path 104 of the outer main air chamber 102 to avoid mutual interference; The specific operation is as follows: In the coaxial light-transmitting base 1 of this device, the inner light-transmitting core 101 is coaxially nested inside the outer main air chamber 102. The annular tangential air passage 104 of the outer main air chamber 102 is connected to the high-pressure air pump through the bottom air source interface 105. The suspended main airflow output by the high-pressure air pump enters the tangential air passage 104 and is ejected from its top tangential outlet. It then diffuses evenly along the arc-shaped inner sidewall of the bowl-shaped hemisphere 2 to the annular slit between the inner diameter of the bowl-shaped hemisphere 2 and the outer diameter of the spherical particle 3. Finally, the air is blown out radially at high speed. According to Bernoulli's principle, the air velocity at the annular slit increases sharply, forming a uniform annular low-pressure zone. The external atmospheric pressure compresses the spherical particles 3 into the center of the opening of the bowl-shaped hemisphere 2, achieving non-contact three-dimensional stable suspension of the spherical particles 3. The top of the inner light-transmitting core 101 is precisely aligned with the spherical measurement area of ​​the suspended particles. Its internal optical path is physically isolated from the tangential air path 104 of the outer main air chamber 102, and the flow field of the suspended air path will not cause any interference to the detection optical path. This application utilizes Bernoulli's principle to create a low-pressure zone through high-speed airflow in an annular slit, which non-contactly compresses spherical particles 3 into the center of a bowl-shaped hemisphere 2 to achieve three-dimensional suspension. This avoids the problems of particle rolling, deformation, and damage to the surface modification layer in traditional contact measurements, ensuring that the detection data reflects the original surface state of the particles. The suspension process is free from any mechanical clamps, which greatly improves the repeatability and accuracy of the measurement results. Furthermore, the tangential air path 104 of the inner light-transmitting cylinder core 101 and the outer main air chamber 102 adopts a coaxial nested physical isolation design. The optical detection light path passes through the inner light-transmitting cylinder core 101, while the suspension and rotation air path is located in the outer annular area. The two do not interfere with each other at all, avoiding the influence of airflow field disturbance and air chamber structure obstruction on the light path. Moreover, the optical detection window 9 is perpendicularly connected to the inner light-transmitting cylinder core 101, with no obstruction or offset in the light path, accurately aligning with the spherical measurement area of ​​the particles, ensuring the transmission stability of incident and reflected light, and improving the accuracy of gloss detection. Please see Figures 3 to 5A retainer 4 is fixed to the outer edge of the opening of the bowl-shaped hemisphere 2, and a directional rotation assembly 5 is snapped into the internal groove of the retainer 4. The directional rotation assembly 5 includes a tangential air blowing pipe 501 snapped into the internal groove of the retainer 4. The tangential airflow output from the tangential air blowing pipe 501 is blown out at high speed along the tangential direction to directly impact the outer side of the equatorial plane of the spherical particles 3 in the suspended state, causing them to rotate uniformly around a vertical axis coaxial with the inner light-transmitting core 101. The flow rate and pressure of the tangential airflow output from the tangential air blowing pipe 501 are much smaller than the main suspended airflow output from the tangential air passage 104 to avoid disrupting the suspension balance of the spherical particles 3. The directional rotation assembly 5 also includes The system includes a connecting pipe 502 that is connected to the tangential air blowing pipe 501. A handle 503 is fixedly connected to the outer wall of the connecting pipe 502, and a slider 504 is fixedly connected to the end of the connecting pipe 502 away from the tangential air blowing pipe 501. The slider 504 slides circumferentially along the guide groove 106 provided on the outer periphery of the outer main air chamber 102. The slider 504 has an installation cavity 505 inside, and a trigger ball 506 controlled by the elasticity of a spring is installed inside the installation cavity 505. When the slider 504 slides along the guide groove 106 to a preset position, the trigger ball 506 squeezes the one-way valve core 108 to realize the on / off control of the bypass port 107 and the tangential air blowing pipe 501. The specific operation is as follows: A directional rotation component 5 is engaged within the retainer 4 at the outer edge of the bowl-shaped hemisphere 2 opening. A guide groove 106, communicating with the inner wall bypass port 107, is opened on the outer periphery of the outer main air chamber 102. A spring-loaded one-way valve core 108 is installed within the bypass port 107. By turning the connecting pipe 502 with the handle 503, the tangential air blowing pipe 501 can be rotated within the retainer 4. Simultaneously, the slider 504 at the end of the connecting pipe 502 slides circumferentially along the guide groove 106 of the outer main air chamber 102. When the slider... When 504 slides to the preset position, the trigger ball 506, which is controlled by the spring elasticity inside, squeezes the one-way valve core 108 in the bypass port 107, realizing the connection between the bypass port 107 and the tangential air blowing pipe 501. The airflow in the outer main air chamber 102 enters the tangential air blowing pipe 501 through the bypass port 107 and the guide groove 106. The tangential air blowing pipe 501 blows the airflow out at high speed along the tangential direction, directly impacting the outer side of the equatorial plane of the spherical particle 3 in the suspended state, applying a uniform circumferential thrust to the particle, and driving the particle to rotate around the inner... The vertical axis of the coaxial transparent tube core 101 rotates at a constant speed, and the flow rate and pressure of the tangential airflow output by the tangential blowing pipe 501 are much smaller than those of the main suspended airflow, ensuring that the suspension balance of the particles is not disrupted. This achieves the goal of keeping the particle's suspension position unchanged and rotating at a constant speed only around the axis. If it is necessary to stop the particle rotation, the handle 503 is reversed to make the slider 504 leave the preset position, triggering the ball 506 to separate from the one-way valve core 108. The one-way valve core 108 is reset under the action of the spring to close the bypass port 107, disconnecting the air path of the tangential blowing pipe 501 and stopping the particle rotation. This application achieves precise on / off control of the air path of the tangential blowing pipe 501 through the mechanically linked directional rotation component 5. The tangential airflow impacts the equatorial surface of the particle, causing it to rotate at a constant speed around the coaxial vertical axis. Moreover, the rotation airflow parameters are much smaller than those of the suspended airflow, so as not to disrupt the suspension balance. During the particle rotation, the detection optical path can continuously detect multiple areas of the spherical surface, solving the problem that the existing technology can only measure the contact surface between the particle and the detection window and cannot reflect the overall gloss characteristics of the particle. The detection data is more representative. Please see Figures 7 to 8The outer main air chamber 102 is mounted on the body 6, and a touch screen 7 is provided on the front of the body 6. A mounting recess 8 is recessed in the middle of the top of the body 6, and the mounting recess 8 is bolted to the connecting flange 103 at the bottom of the outer main air chamber 102. An optical detection window 9 is provided at the middle of the bottom of the mounting recess 8, and the optical detection window 9 is perpendicularly connected to the internal optical path of the inner light-transmitting cylinder core 101. A bracket 10 is installed inside the body 6, and a light source generating device 11 is installed on one side of the bracket 10. The light source generating device 11 includes a generating cylinder 1101 installed on one side of the bracket 10. The generating cylinder 1101 is connected to a first gloss sensor 1102, and a light source generating device is installed at the bottom of the inside of the generating cylinder 1101. A condenser lens 1103 is provided, and a light source bulb 1104 is installed inside the condenser lens 1103. A first double-sided convex lens 1105 is installed in the opening direction of the condenser lens 1103. A frosted glass 1106 is installed in the first double-sided convex lens 1105 along the light path direction. A second double-sided convex lens 1107 is installed in the frosted glass 1106 along the light path direction. A light source receiving device 12 is installed on the other side of the bracket 10. The light source receiving device 12 includes a receiving tube 1201 installed on the other side of the bracket 10. A second gloss sensor 1202 is installed at the bottom inside the receiving tube 1201. A third double-sided convex lens 1203 is installed in the second gloss sensor 1202 along the light path direction.

[0025] It should be further explained that the basic optical structure and core gloss measurement principle of the gloss meter for modified polypropylene particles in this application are consistent with the invention patent for a curved surface pinhole gloss meter with publication number CN106018351A. Both are based on the standardized specular reflection measurement principle, and achieve surface gloss detection through the core process of light source generation, light transmission, reflected light reception, and dual-sensor signal acquisition and processing. This application inherits the technical advantages of the prior art in the detection of curved surfaces and pinhole-type test objects, such as small spot focusing and precise light path guidance, ensuring the accuracy and stability of the optical detection process. This application is specifically designed for the detection of spherical modified polypropylene particles, and further improves upon the existing optical detection methods. By leveraging structural innovation and functional expansion, this technology addresses the core technical shortcomings of existing general-purpose gloss meters, such as their large measurement area and inability to adapt to small-sized curved test objects. It also overcomes industry pain points in spherical material testing, such as the susceptibility to interference from contact positioning and the inability to perform full-area testing on curved spherical surfaces. Furthermore, it extends the existing technology's adaptability to curved surfaces and small-hole test objects to the specialized testing scenario of micron- to millimeter-sized spherical modified polypropylene particles. This fills the application gap of existing technology for this specific testing object, enabling gloss testing technology to adapt to the product characteristics and industrial testing needs of modified polypropylene particles. This represents a technological extension and precise adaptation from general-purpose curved surface testing to specialized spherical particle testing.

[0026] In summary, when using a gloss meter for modified polypropylene granules: First, in the coaxial light-transmitting base 1 of this device, the inner light-transmitting cylindrical core 101 is coaxially nested inside the outer main air chamber 102. The annular tangential air passage 104 of the outer main air chamber 102 is connected to the high-pressure air pump through the bottom air source interface 105. After the suspended main airflow output by the high-pressure air pump enters the tangential air passage 104, it is ejected from the tangential outlet at its top and diffuses evenly along the arc-shaped inner sidewall of the bowl-shaped hemisphere 2 to the annular slit between the inner diameter of the bowl-shaped hemisphere 2 and the outer diameter of the spherical particle 3, and finally flows out in diameter. The air is blown out at high speed. According to Bernoulli's principle, the air velocity at the annular slit increases sharply, forming a uniform annular low-pressure zone. The external atmospheric pressure compresses the spherical particles 3 to the center of the opening of the bowl-shaped hemisphere 2, achieving non-contact, three-dimensional stable suspension of the spherical particles 3. Furthermore, the top of the inner light-transmitting core 101 is precisely aligned with the spherical measurement area of ​​the suspended particles. Its internal optical path is physically isolated from the tangential air path 104 of the outer main air chamber 102. The flow field of the suspended air path will not interfere with the detection optical path. The application utilizes Bernoulli's principle to create a low-pressure zone through a high-speed airflow in an annular slit, allowing spherical particles 3 to be non-contactly compressed into the center of a bowl-shaped hemisphere 2, achieving three-dimensional suspension. This avoids the problems of particle rolling, deformation, and damage to the surface modification layer in traditional contact measurements, ensuring that the detection data reflects the original surface state of the particles. The suspension process is conducted without any mechanical clamps, significantly improving the repeatability and accuracy of the measurement results. Furthermore, the tangential air paths 104 of the inner transparent cylinder core 101 and the outer main air chamber 102 adopt a coaxial nested physical isolation design. The optical detection light path passes through the inner transparent cylinder core 101, while the suspension and rotation air path is located in the outer annular area. The two are completely independent of each other, avoiding the influence of airflow field disturbance and air chamber structure obstruction on the light path. Moreover, the optical detection window 9 is perpendicularly connected to the inner transparent cylinder core 101, ensuring an unobstructed and unoffset light path that is precisely aligned with the spherical measurement area of ​​the particles, guaranteeing the transmission stability of incident and reflected light, and improving the accuracy of gloss detection. Secondly, a directional rotation component 5 is engaged within the retainer 4 at the outer edge of the bowl-shaped hemisphere 2 opening. A guide groove 106, communicating with the inner wall bypass port 107, is provided on the outer periphery of the outer main air chamber 102. A spring-loaded one-way valve core 108 is installed within the bypass port 107. By turning the connecting pipe 502 with the handle 503, the tangential air blowing pipe 501 can rotate within the retainer 4. Simultaneously, the slider 504 at the end of the connecting pipe 502 slides circumferentially along the guide groove 106 of the outer main air chamber 102. When the slider 504... When slid to the preset position, the trigger ball 506, which is controlled by the elasticity of the spring inside, squeezes the one-way valve core 108 in the bypass port 107, realizing the connection between the bypass port 107 and the tangential air blowing pipe 501. The airflow in the outer main air chamber 102 enters the tangential air blowing pipe 501 through the bypass port 107 and the guide groove 106. The tangential air blowing pipe 501 blows the airflow out at high speed along the tangential direction, directly impacting the outer side of the equatorial plane of the spherical particle 3 in the suspended state, applying a uniform circumferential thrust to the particle, and driving the particle to rotate around the inner layer. The vertical axis of the optical tube core 101 rotates at a constant speed, and the flow rate and pressure of the tangential airflow output by the tangential blowing pipe 501 are much smaller than those of the main suspended airflow, ensuring that the suspension balance of the particles is not disrupted. This allows the particles to remain in a constant suspended position and rotate at a constant speed only around the axis. If it is necessary to stop the particle rotation, the handle 503 is reversed to make the slider 504 leave the preset position, triggering the ball 506 to separate from the one-way valve core 108. The one-way valve core 108 is reset under the action of the spring to close the bypass port 107, disconnecting the air path of the tangential blowing pipe 501 and stopping the particle rotation. This application achieves precise on / off control of the air path of the tangential blowing pipe 501 through the mechanically linked directional rotation component 5. The tangential airflow impacts the equatorial surface of the particles, causing them to rotate at a constant speed around the coaxial vertical axis. Moreover, the rotation airflow parameters are much smaller than those of the suspended airflow, so as not to disrupt the suspension balance. During the particle rotation, the detection optical path can continuously detect multiple areas of the spherical surface, solving the problem that the existing technology can only measure the contact surface between the particles and the detection window and cannot reflect the overall gloss characteristics of the particles. The detection data is more representative. Finally, the outer main air chamber 102 is bolted to the mounting recess 8 at the top of the body 6 via the bottom connecting flange 103. The optical detection window 9 below the mounting recess 8 is perpendicularly connected to the internal optical path of the inner light-transmitting cylinder core 101, forming an unobstructed optical channel from the inside of the body 6 to the suspended particle measurement area. The light source generating device 11 inside the body 6 starts to work. After the light source bulb 1104 emits light, the first gloss sensor 1102 detects the original brightness of the light source bulb 1104 in real time, which serves as the reference signal for gloss calculation. The light emitted by the light source bulb 1104 is focused by the spherical condenser curved mirror 1103 onto the focal point of the first double-sided convex lens 1105. The light is then balanced and emitted by the first double-sided convex lens 1105. After passing through the frosted glass 1106, the light is scattered. The scattered light is then dispersed by the second double-sided convex lens 1105. After being rebalanced by the convex lens 1107, the light passes through the optical detection window 9 and the inner light-transmitting core 101 in sequence, precisely projecting onto the spherical measurement area of ​​the suspended and uniformly rotating spherical particle 3, forming a stable detection spot. After being reflected by the specular surface of the particle being measured, the light is emitted in the opposite direction along the light path, focused by the third double-sided convex lens 1203, and then transmitted to the second gloss sensor 1202. The second gloss sensor 1202 captures the brightness of the reflected light and converts it into a detection signal. The instrument processes the reference signal of the first gloss sensor 1102 and the detection signal of the second gloss sensor 1202 to finally obtain the gloss value of the surface of the spherical modified polypropylene particle. During the uniform rotation of the particle, the detection light path can complete the gloss detection of multiple areas of the spherical surface of the particle, reflecting the true surface gloss characteristics of the particle.

[0027] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, and the existence of an infinite number of specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A gloss meter for modified polypropylene granules, comprising a coaxial light-transmitting base (1), characterized in that, The coaxial light-transmitting base (1) includes an inner light-transmitting cylindrical core (101) installed inside. The inner light-transmitting cylindrical core (101) is a cylindrical structure with open ends. The inner light-transmitting cylindrical core (101) is coaxially nested inside the outer main air chamber (102). A connecting flange (103) is integrally fixed at the bottom of the outer main air chamber (102). An annular tangential air passage (104) is provided inside the outer main air chamber (102). The tangential outlet at the top of the tangential air passage (104) is lower than the end of the inner light-transmitting cylindrical core (101). The outer main air chamber (102) has a planar surface, and the bottom side of the tangential air passage (104) is connected to the outlet of the high-pressure air pump through the air source interface (105). The outer main air chamber (102) has a guide groove (106) recessed in the outer periphery, and the inner wall of the outer main air chamber (102) has an array of bypass ports (107). The outlet end of the bypass port (107) is connected to the guide groove (106), and a one-way valve core (108) controlled by the spring elasticity is installed inside the bypass port (107) to control the opening and closing of the outlet end of the bypass port (107).

2. The gloss meter for modified polypropylene granules according to claim 1, characterized in that, The top of the outer main air chamber (102) is seamlessly connected to a bowl-shaped hemisphere (2), and a spherical particle (3) is placed inside the bowl-shaped hemisphere (2). The inner diameter of the bowl-shaped hemisphere (2) is slightly larger than the outer diameter of the spherical particle (3), and there is an annular slit between the inner diameter of the bowl-shaped hemisphere (2) and the outer diameter of the spherical particle (3).

3. The gloss meter for modified polypropylene granules according to claim 2, characterized in that, The tangential airflow output by the tangential air passage (104) diffuses evenly along the arc-shaped inner wall of the bowl-shaped hemisphere (2) to the annular slit and is blown out radially at high speed. The uniform annular low-pressure zone formed by the annular slit between the inner diameter of the bowl-shaped hemisphere (2) and the outer diameter of the spherical particle (3) squeezes the spherical particle (3) to the center of the opening of the bowl-shaped hemisphere (2) to achieve three-dimensional stable suspension.

4. A gloss meter for modified polypropylene granules according to claim 3, characterized in that, The top of the inner light-transmitting core (101) is precisely aligned with the spherical measurement area of ​​the spherical particle (3) suspended in the center of the opening of the bowl-shaped hemisphere (2), and the internal light path of the inner light-transmitting core (101) is physically isolated from the internal tangential air path (104) of the outer main air chamber (102) to avoid mutual interference.

5. A gloss meter for modified polypropylene granules according to claim 4, characterized in that, The bowl-shaped hemisphere (2) has a retainer (4) fixed to the outer edge of the opening, and the retainer (4) has an internal groove with a directional rotation component (5) engaged.

6. A gloss meter for modified polypropylene granules according to claim 5, characterized in that, The directional rotation assembly (5) includes a tangential air blowing pipe (501) that is snapped into the inner groove of the retainer (4). The tangential air blowing pipe (501) outputs a tangential airflow that blows out at high speed along the tangential direction to directly impact the outer side of the equatorial plane of the spherical particles (3) in the suspended state, causing them to rotate at a constant speed around a vertical axis coaxial with the inner light-transmitting cylinder core (101). The flow rate and pressure of the tangential airflow output by the tangential air blowing pipe (501) are much smaller than the main suspended airflow output by the tangential air passage (104) to avoid disrupting the suspension balance of the spherical particles (3).

7. A gloss meter for modified polypropylene granules according to claim 6, characterized in that, The directional rotation assembly (5) also includes a connecting pipe (502) connected to the tangential blowing pipe (501). A handle (503) is fixedly connected to the outer wall of the connecting pipe (502), and a slider (504) is fixedly connected to the end of the connecting pipe (502) away from the tangential blowing pipe (501). The slider (504) slides circumferentially along the guide groove (106) provided on the outer periphery of the outer main air chamber (102), and an installation cavity (505) is provided inside the slider (504). A trigger ball (506) controlled by the elasticity of a spring is installed inside the installation cavity (505). When the slider (504) slides along the guide groove (106) to the preset position, the trigger ball (506) squeezes the one-way valve core (108) to realize the on / off control of the bypass port (107) and the tangential blowing pipe (501).

8. A gloss meter for modified polypropylene granules according to claim 7, characterized in that, The outer main air chamber (102) is installed on the body (6), and a touch screen (7) is provided on the front of the body (6). The top middle of the body (6) is recessed and has an installation recess (8), which is bolted to the connecting flange (103) at the bottom of the outer main air chamber (102). An optical detection window (9) is provided at the middle of the bottom of the installation recess (8), and the optical detection window (9) is perpendicularly connected to the internal light path of the inner light-transmitting cylinder core (101).

9. A gloss meter for modified polypropylene granules according to claim 8, characterized in that, The body (6) is equipped with a bracket (10) inside. A light source generating device (11) is installed on one side of the bracket (10). The light source generating device (11) includes a generating cylinder (1101) installed on one side of the bracket (10). The generating cylinder (1101) is connected to a first gloss sensor (1102). A condenser curved mirror (1103) is installed at the bottom inside the generating cylinder (1101). A light source bulb (1104) is installed inside the condenser curved mirror (1103). A first double-sided convex lens (1105) is installed in the opening direction of the condenser curved mirror (1103). A frosted glass (1106) is installed in the first double-sided convex lens (1105) along the light path direction. A second double-sided convex lens (1107) is installed in the frosted glass (1106) along the light path direction.

10. A gloss meter for modified polypropylene particles according to claim 9, characterized in that, A light source receiving device (12) is installed on the other side of the bracket (10). The light source receiving device (12) includes a receiving tube (1201) installed on the other side of the bracket (10). A second gloss sensor (1202) is installed at the bottom inside the receiving tube (1201), and a third double-sided convex lens (1203) is installed on the second gloss sensor (1202) along the light path direction.

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