A melt indexer

Abstract

The application discloses a melt index tester, a melt cylinder of the melt index tester is arranged in a seat body, the melt cylinder is provided with a communicating containing cavity and a discharge port, the containing cavity is used for storing a to-be-tested feed so that the to-be-tested feed flows out through the discharge port, a receiving assembly is arranged in the seat body, the receiving assembly comprises a driving member and a receiving disc which are connected with each other, the receiving disc is located below the discharge port, and the driving member is used for driving the receiving disc to move at a first preset speed, so that the receiving disc sequentially receives multiple sections of discharging material flowing out of the discharge port, and the multiple sections of discharging material are located at different positions on the receiving disc. The melt index tester can drive the receiving disc to move at the first preset speed through the driving member of the receiving assembly and automatically receive the multiple sections of discharging material flowing out in a test process, so that the multiple sections of discharging material are located at different positions on the receiving disc, the adhesion between the multiple sections of discharging material is reduced or avoided, the reliability of the melt index test is improved, and manual receiving operation of a user is not needed, thereby improving the use experience of the user.

Description

Technical Field

[0001] This application relates to the field of melt flow index testing technology, and in particular to a melt flow indexer. Background Technology

[0002] In recent years, with the development of the consumer electronics industry, products have been continuously moving towards thinner, lighter, smaller, and more integrated designs. These products now place higher demands on the biocompatibility, precision, and reliability of components. Therefore, metal injection molding (MIM) is often used to produce complex-shaped, high-precision, and miniaturized metal parts.

[0003] For MIM (Metal Injection Molding) process feedstock preparation, melt flow index (MFI) is a crucial indicator for measuring feedstock flowability. MFI reflects the flow performance of the feedstock during the molding process; a suitable MFI ensures that the feedstock uniformly fills the mold during injection molding, guaranteeing the molding quality and production efficiency of MIM products. Currently, with existing MFI analyzers, the feedstock to be tested flows out through the outlet of the molten material cylinder. Users need to manually collect the material using a receiving tray, which is inconvenient. Furthermore, problems such as material sticking and inability to separate multiple sections often occur during collection, hindering subsequent MFI calculations. Utility Model Content

[0004] To address the technical problem of material sticking during discharge in existing technologies, this application provides a melt flow indexer.

[0005] To address the technical problems existing in the prior art, this application provides a melt flow indexer, including a base, a molten material cylinder, and a receiving assembly. The molten material cylinder is disposed on the base and has a communicating receiving cavity and a discharge port. The receiving cavity is used to store the feed to be tested, so that the feed to be tested flows out through the discharge port. The receiving assembly is disposed on the base and includes a drive member and a receiving tray connected to each other. The receiving tray is located below the discharge port. The drive member is used to drive the receiving tray to move at a first preset speed, so that the receiving tray sequentially receives multiple segments of material flowing out of the discharge port, and the multiple segments of material are at different positions on the receiving tray.

[0006] Optionally, the melt flow indexer further includes a scraper, which is disposed at the discharge port. The scraper is used to cut the feed material to be tested flowing out of the discharge port at a second preset speed to obtain the multi-segment material; wherein the second preset speed corresponds to the first preset speed.

[0007] Optionally, the receiving assembly further includes a connecting shaft, and the driving member is connected to the receiving tray via the connecting shaft. The driving member is used to drive the receiving tray to rotate at the first preset speed.

[0008] Optionally, the center of the connecting shaft coincides with the center of the receiving tray.

[0009] Optionally, the center of the connecting shaft does not coincide with the center of the receiving tray.

[0010] Optionally, the driving member is used to drive the receiving position of the receiving tray to move along the trajectory of the spiral line, and the starting point of the spiral line coincides with the projection of the discharge port on the receiving tray.

[0011] Optionally, the receiving assembly further includes a transmission component and a transmission belt. The driving component is connected to the transmission belt via the transmission component. The receiving tray is disposed on the transmission belt. The driving component is used to drive the receiving tray to move along a first preset direction.

[0012] Optionally, the receiving assembly further includes a guide rail, the receiving tray is disposed on the guide rail, and the driving member is used to drive the receiving tray to move along the extension direction of the guide rail.

[0013] Optionally, the receiving assembly further includes a first guide rail and a second guide rail. The receiving assembly also includes a first driving member and a second driving member. The second guide rail is slidably connected to the first guide rail. The receiving tray is disposed on the second guide rail. The first driving member is used to drive the second guide rail to move along the extension direction of the first guide rail. The second driving member is used to drive the receiving tray to move along the extension direction of the second guide rail.

[0014] This application provides a melt flow indexer, which includes a base, a molten material cylinder, and a receiving assembly. The molten material cylinder is disposed on the base and has a communicating receiving cavity and a discharge port. The receiving cavity is used to store the feed material to be tested, and the feed material to be tested flows out through the discharge port. The receiving assembly is disposed on the base and includes a drive component and a receiving tray connected to each other. The receiving tray is located below the discharge port. The drive component drives the receiving tray to move at a first preset speed, so that the receiving tray sequentially receives multiple segments of material flowing out of the discharge port. The positions of the multiple segments of material on the receiving tray are different. Therefore, the melt flow indexer of this application can drive the receiving tray to move at a first preset speed through the drive component of the receiving assembly and automatically receive the multiple segments of material flowing out during the test. This ensures that the positions of the multiple segments of material on the receiving tray are different, reducing or avoiding adhesion between the multiple segments of material, improving the reliability of melt flow index testing, and eliminating the need for manual receiving by the user, thus improving the user experience. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the first embodiment of the melt flow indexer provided in this application;

[0017] Figure 2 This is a schematic diagram of the structure of the second embodiment of the melt flow indexer provided in this application;

[0018] Figure 3 yes Figure 2 A schematic diagram of the spiral trajectory of the receiving position of the intermediate receiving tray;

[0019] Figure 4 This is a schematic diagram of the third embodiment of the melt flow indexer provided in this application;

[0020] Figure 5 This is a schematic diagram of the fourth embodiment of the melt flow indexer provided in this application;

[0021] Figure 6 yes Figure 5 A top-down view of the material receiving assembly projected vertically downwards from above.

[0022] In the figure, 1 is the melt indexer; 10 is the base; 20 is the melting cylinder; 21 is the feed to be tested; 22 is the die; 221 is the discharge port; 30 is the receiving assembly; 31 is the driving component; 311 is the first driving component; 312 is the second driving component; 32 is the receiving tray; 321 is the discharge port; 33 is the connecting shaft; 34 is the transmission component; 35 is the transmission belt; 36 is the guide rail; 361 is the first guide rail; 362 is the second guide rail; 40 is the piston rod; and 50 is the mass component. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or connections separated by an intermediate medium. For those skilled in the art, if directional indicators (such as up, down, left, right, front, back, etc.) are involved in the embodiments of this application, these directional indicators are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indicators will also change accordingly.

[0026] This application first provides a melt flow indexer, which is used to measure the melt flow index (MFI) of thermoplastic materials (such as plastics, MIM feedstocks, etc.). The melt flow index is used to measure the flow properties of the feedstock in the molten state.

[0027] In this embodiment, please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of the first embodiment of the melt flow indexer provided in this application. Figure 1 As shown, the melt indexer 1 includes a base 10, a melting cylinder 20, and a receiving assembly 30. The melting cylinder 20 is disposed on the base 10 and has a connected receiving cavity and a discharge port 221. The receiving cavity is used to store the feed to be tested 21 so that the feed to be tested 21 flows out through the discharge port 221. The receiving assembly 30 is disposed on the base 10 and includes a drive member 31 and a receiving tray 32 connected to each other. The receiving tray 32 is located below the discharge port 221. The drive member 31 is used to drive the receiving tray 32 to move at a first preset speed so that the receiving tray 32 sequentially receives the multi-segment material 321 flowing out of the discharge port 221. The multi-segment material 321 is in a different position on the receiving tray 32.

[0028] Specifically, the molten material cylinder 20 is provided with a receiving cavity for loading the test feed 21. A heating element may also be provided on the molten material cylinder 20 to heat the test feed 21 inside the molten material cylinder 20 to a molten state. A discharge port 221 of a preset size is provided at the bottom of the receiving cavity. In a possible embodiment, the melt indexer 1 further includes a die 22, which is disposed at the bottom of the receiving cavity to form the discharge port 221. The die 22 is used to make the melt indices of different materials comparable through standardized aperture and length.

[0029] The melt indexer 1 may also include a piston rod 40, which is placed in the receiving cavity. The piston rod 40 is used to directly contact the feed material 21 to be tested and apply a certain pressure to the feed material 21 to compact it and ensure that the material melts uniformly in the melting barrel 20. The piston rod 40 is also used to push the feed material 21 to be tested to flow, so that the movement of the piston rod 40 can simulate the flow process of the feed material 21 to be tested in the actual injection molding process, so that the material 321 flowing out of the outlet 221 can reflect the melt index of the feed material 21 to be tested.

[0030] The receiving assembly 30 includes a drive unit 31 and a receiving tray 32 connected to each other. The receiving tray 32 is located below the discharge port 221 and is used to receive the material 321 flowing out of the discharge port 221, so that the melt index of the feed 21 to be tested can be calculated using the physical parameters or other parameters of the material 321. The drive unit 31 is used to drive the receiving tray 32 to move at a first preset speed. The drive unit 31 can drive the receiving tray 32 to move by means of, but is not limited to, a motor, electric cylinder, electromagnetic drive unit, motor, etc. The movement path of the receiving tray 32 includes, but is not limited to, linear left-right or up-down movement, circular movement, S-shaped movement, spiral movement, etc. The transmission method between the drive unit 31 and the receiving tray 32 includes, but is not limited to, gear transmission, belt transmission, chain transmission, screw transmission, etc. Under the pressure of the piston rod 40, the feed 21 to be tested flows out through the discharge port 221 and is cut, so that multiple segments of material 321 fall out of the discharge port 221 in sequence according to the cutting speed. The drive unit 31 drives the receiving plate 32 to move at a first preset speed, so that the receiving plate 32 sequentially receives and takes out the multiple segments of material 321 flowing out of the discharge port 221, so that the multiple segments of material 321 are in different positions on the receiving plate 32.

[0031] In this embodiment, the melt indexer 1 includes a base 10, a melting cylinder 20, and a receiving assembly 30. The melting cylinder 20 is disposed on the base 10 and has a connected receiving cavity and a discharge port 221. The receiving cavity is used to store the feed to be tested 21 so that the feed to be tested 21 flows out through the discharge port 221. The receiving assembly 30 is disposed on the base 10 and includes a drive member 31 and a receiving tray 32 connected to each other. The receiving tray 32 is located below the discharge port 221. The drive member 31 is used to drive the receiving tray 32 to move at a first preset speed so that the receiving tray 32 sequentially receives the multi-segment material 321 flowing out of the discharge port 221. The multi-segment material 321 is in a different position on the receiving tray 32. Therefore, the melt flow indexer 1 in this embodiment can drive the receiving tray 32 to move at a first preset speed through the driving component 31 of the receiving component 30 and automatically pick up the multi-segment material 321 flowing out during the test, so that the multi-segment material 321 is in different positions on the receiving tray 32, reducing or avoiding the adhesion between the multi-segment material 321, improving the reliability of the melt flow index test, and eliminating the need for manual picking operation by the user, thus improving the user experience.

[0032] In one embodiment, the melt flow indexer 1 further includes a scraper (not shown), which is disposed at the discharge port 221. The scraper is used to cut the feed 21 to be tested flowing out of the discharge port 221 at a second preset speed to obtain multi-segment material 321; wherein the second preset speed corresponds to the first preset speed.

[0033] Specifically, the scraper is set at the discharge port 221. When the scraper cuts the feed 21 to be tested flowing out of the discharge port 221, since the second preset speed of the scraper during cutting corresponds to the first preset speed of the receiving tray 32 during movement, the receiving tray 32 can make the two adjacent sections of the feed 321 fall into the receiving tray 32 at different positions when it picks up the feed 321, thereby reducing or avoiding the adhesion between the two adjacent sections of the feed 321. In a possible implementation, the correspondence between the second preset speed and the first preset speed can be designed based on the area / length / width occupied by the falling material 321 on the receiving tray 32. For example, the length of the falling material 321 in the moving direction of the receiving tray 32 can be obtained, and the interval length between two adjacent segments of material 321 can be designed. The sum of the length of the falling material 321 and the interval length can be used as the displacement value that the receiving tray 32 needs to move between the two adjacent segments of material 321. Based on this displacement value and the cutting time of the two adjacent segments of material 321, the first preset speed corresponding to the second preset speed can be designed.

[0034] Therefore, the melt flow indexer 1 in this embodiment can be configured such that the second preset speed during scraper cutting corresponds to the first preset speed during the movement of the receiving tray 32, so that when the receiving tray 32 receives two adjacent material segments 321 flowing out during the test, the positions of the adjacent material segments 321 on the receiving tray 32 are different, thereby reducing or avoiding adhesion between the adjacent material segments 321, improving the reliability of the melt flow index test, and eliminating the need for manual receiving by the user, thus improving the user experience.

[0035] In one embodiment, please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of the second embodiment of the melt flow indexer provided in this application. Figure 2 As shown, the receiving assembly 30 also includes a connecting shaft 33, and the driving component 31 is connected to the receiving tray 32 through the connecting shaft 33. The driving component 31 is used to drive the receiving tray 32 to rotate at a first preset speed.

[0036] Specifically, the connecting shaft 33 can be the rotating shaft of the driving member 31, or it can be a transmission shaft used to connect the rotating shaft of the driving member 31 and the receiving tray 32; the driving member 31 is used to drive the receiving tray 32 to rotate at a first preset speed via the connecting shaft 33. The receiving tray 32 can rotate at the first preset speed in a clockwise or counterclockwise direction, but is not limited to this. The connecting shaft 33 can be located at the center of the receiving tray 32, or it can be eccentrically positioned relative to the receiving tray 32.

[0037] Therefore, the drive component 31 of the receiving assembly 30 in this embodiment can output driving force to the connecting shaft 33, so that the connecting shaft 33 drives the receiving tray 32 to rotate. The transmission method is simple, which can effectively reduce the use of the transmission component 34 and save the space occupied in the transmission process. This allows the receiving assembly 30 of this embodiment to realize the movement and receiving of the receiving tray 32 in a smaller space, thereby improving the space utilization of the melt indexer 1.

[0038] Optionally, the projection of the discharge port 221 onto the receiving tray 32 does not completely overlap with the projection of the connecting shaft 33 onto the receiving tray 32.

[0039] Specifically, the projection of the discharge port 221 onto the receiving tray 32 does not completely overlap with the projection of the connecting shaft 33 onto the receiving tray 32, and the central axis of the discharge port 221 does not intersect with the extension line of the connecting shaft 33. Therefore, when the first segment of material flows out of the discharge port 221, the first segment of material falls onto the tray surface of the receiving tray 32 located on the side of the connecting shaft 33. The driving member 31 drives the receiving tray 32 to rotate through the connecting shaft 33, and the second segment of material flowing out of the discharge port 221 can fall onto the next empty tray surface on the side of the connecting shaft 33. While reducing or avoiding the adhesion between the first and second segments of material, the space occupied by the receiving tray 32 during its movement can be effectively saved. This allows the receiving assembly 30 of this embodiment to realize the rotation and receiving of the receiving tray 32 in a smaller space, further improving the space utilization rate of the melt indexer 1.

[0040] Furthermore, the center of the connecting shaft 33 may or may not coincide with the center of the receiving tray 32.

[0041] Specifically, when the center of the connecting shaft 33 coincides with the center of the receiving tray 32, that is, when the center of the receiving tray 32 is located on the extension line of the connecting shaft 33, the connecting shaft 33 is installed at the geometric center of the receiving tray 32 through bearings, keys, splines, and other fixing devices. This allows the connecting shaft 33 to drive the receiving tray 32 to rotate around its geometric center and perform circular motion. The movement trajectory of any receiving position on the surface of the receiving tray 32 is a circle with the axis as the center. Therefore, the receiving assembly 30 can prevent adjacent material sections 321 from sticking together by using the fixed movement trajectory on the receiving tray 32, thus accurately controlling the rotational position of the receiving tray 32 and reducing structural complexity.

[0042] When the center of the connecting shaft 33 does not coincide with the center of the receiving tray 32, that is, when the connecting shaft 33 is located on one side of the center of the receiving tray 32, the connection between the connecting shaft 33 and the receiving tray 32 can be achieved through structures such as eccentric wheels, eccentric shafts, or eccentric bearings. Due to the eccentricity between the center of the connecting shaft 33 and the center of the receiving tray 32, when the receiving tray 32 moves in a circular motion around the connecting shaft 33, the trajectory of any receiving position on the surface of the receiving tray 32 can be, but is not limited to, an elliptical or non-circular trajectory.

[0043] In the above embodiment, the receiving assembly 30 can be designed with an eccentric rotation between the receiving tray 32 and the connecting shaft 33, so that the non-circular trajectory on the tray surface ensures that the material 321 flowing out of the discharge port 221 can be staggered and distributed at different positions on the receiving tray 32. Therefore, compared with the concentric rotation of the receiving tray 32 and the connecting shaft 33, the eccentric rotation method can ensure that adjacent material 321 do not stick together, allowing the receiving tray 32 of the same area to receive more material 321, thereby improving the utilization rate of the tray surface on the receiving tray 32 and further improving the space utilization rate of the melt flow indexer 1.

[0044] Optionally, please see Figure 3 , Figure 3 yes Figure 2 A schematic diagram of the spiral trajectory of the material receiving position on the intermediate receiving tray. (See diagram below.) Figure 3 As shown, the drive unit 31 is used to drive the receiving position of the receiving tray 32 to move along the trajectory of the spiral line, and the starting point of the spiral line coincides with the projection of the discharge port 221 on the receiving tray 32.

[0045] Specifically, the receiving position of the receiving tray 32 is a preset point on the receiving tray 32 for receiving the dropped material 321. The driving component 31 is used to drive the receiving tray 32 to move, so that the receiving position on the receiving tray 32 presents a spiral motion trajectory. The driving component 31 can be a multi-directional drive motor, so that the receiving position on the receiving tray 32 presents a spiral motion trajectory through the coordinated action of multiple directions; for example, the driving component 31 includes a first motor and a second motor. The first motor drives the receiving tray 32 and the connecting shaft 33 to move along the length direction, and the second motor drives the receiving tray 32 to rotate through the connecting shaft 33, so that the receiving position on the receiving tray 32 presents a spiral motion trajectory.

[0046] The starting point of the spiral can be located at the midpoint of the receiving tray 32, or near the midpoint of the receiving tray 32. The starting point of the spiral coincides with the projection of the discharge port 221 on the receiving tray 32. For example, the material 321 received during receiving is sequentially defined as the first material, the second material, the third material, ..., the Nth material. The first material falls through the discharge port 221 to the first position of the receiving tray 32, the second material falls through the discharge port 221 to the second position of the receiving tray 32, the third material falls through the discharge port 221 to the third position of the receiving tray 32, ..., the Nth material falls through the discharge port 221 to the Nth position of the receiving tray 32. The first position is located at the starting point of the spiral, and the first, second, third, ..., Nth positions are arranged in a spiral shape on the receiving tray 32.

[0047] Therefore, the receiving component 30 in this embodiment can be designed to drive the receiving tray 32 by the drive component 31, so that the receiving position on the receiving tray 32 presents a spiral motion trajectory, so as to maximize the use of the receiving area on the receiving tray 32 and further improve the tray surface utilization rate and the space utilization rate of the melt indexer 1.

[0048] In one embodiment, please refer to Figure 4 , Figure 4 This is a schematic diagram of the third embodiment of the melt flow indexer provided in this application. Figure 4As shown, the receiving assembly 30 also includes a transmission component 34 and a transmission belt 35. The driving component 31 is connected to the transmission belt 35 through the transmission component 34. The receiving tray 32 is disposed on the transmission belt 35. The driving component 31 is used to drive the receiving tray 32 to move along a first preset direction.

[0049] Specifically, unlike the above-mentioned scheme where the receiving tray 32 is driven to rotate via the connecting shaft 33, the receiving assembly 30 in this embodiment includes a transmission member 34 and a transmission belt 35. The rotating shaft of the driving member 31 is connected to the transmission belt 35 via the transmission member 34, so that the driving force of the driving member 31 is output to the transmission belt 35 and drives the transmission belt 35 to rotate. The receiving tray 32 is disposed on the transmission belt 35, and the transmission belt 35 is used to drive the receiving tray 32 to move along a first preset direction. The first preset direction may be, but is not limited to, the length direction of the seat 10. For example, the transmission member 34 may include a first transmission wheel and a second transmission wheel arranged sequentially along the first preset direction. The transmission belt 35 covers the first transmission wheel and the second transmission wheel. The first transmission wheel and / or the second transmission wheel are connected to the driving member 31, and the driving member 31 is used to drive the transmission belt 35 to rotate via the first transmission wheel and / or the second transmission wheel.

[0050] At this time, the receiving tray 32 covers the surface of the transmission belt 35, and the projection of the discharge port 221 on the receiving tray 32 is located on the movement trajectory of the receiving tray 32. When the driving member 31 drives the transmission belt 35 to rotate, the receiving tray 32 moves with the transmission belt 35. Since the first transmission wheel and the second transmission wheel are arranged sequentially along the first preset direction, the transmission belt 35 between the first transmission wheel and the second transmission wheel has a preset receiving length. When the driving member 31 drives the receiving tray 32 to move within the preset receiving length, the material 321 flowing out through the discharge port 221 can fall sequentially onto the receiving tray 32 on the upper surface of the transmission belt 35, so that the multi-segment material 321 is arranged sequentially on the receiving tray 32 along the first preset direction, and the multi-segment material 321 does not stick to each other, improving the reliability of the melt flow index test.

[0051] In one embodiment, please refer to Figure 5 , Figure 5 This is a schematic diagram of the fourth embodiment of the melt flow indexer provided in this application. Figure 5 As shown, the receiving assembly 30 also includes a guide rail 36, a receiving tray 32 is disposed on the guide rail 36, and a driving member 31 is used to drive the receiving tray 32 to move along the extension direction of the guide rail 36.

[0052] Specifically, the guide rail 36 may extend along a first preset direction, and / or the guide rail 36 may extend along a second preset direction, the second preset direction being intersecting or perpendicular to the first preset direction. For example, the guide rail 36 may be, but is not limited to, arranged along the length or width direction of the base 10. In a possible embodiment, the projection of the discharge port 221 onto the receiving tray 32 is located on the guide rail 36, to ensure that the material 321 flowing out of the discharge port 221 can fall at a certain receiving position on the receiving tray 32, thereby improving the receiving accuracy of the receiving assembly 30.

[0053] Optionally, in one embodiment, the receiving assembly 30 includes a guide rail 36 extending along a first preset direction, and the receiving tray 32 is elongated. The driving member 31 is used to drive the receiving tray 32 to move along the first preset direction. The material 321 flowing out through the discharge port 221 can fall onto the receiving tray 32 in sequence, so that the multi-segment material 321 is arranged in sequence on the receiving tray 32 along the first preset direction, and the multi-segment material 321 does not stick to each other, further improving the reliability of the melt flow index test.

[0054] Alternatively, in another embodiment, please refer to Figure 6 , Figure 6 yes Figure 5 A top-down structural view of the intermediate receiving assembly projected vertically downwards. (See diagram below.) Figure 6 As shown, the receiving assembly 30 also includes a first guide rail 361 and a second guide rail 362. The receiving assembly 30 includes a first driving member 311 and a second driving member 312. The second guide rail 362 is slidably connected to the first guide rail 361. The receiving tray 32 is disposed on the second guide rail 362. The first driving member 311 is used to drive the second guide rail 362 to move along the extension direction of the first guide rail 361. The second driving member 312 is used to drive the receiving tray 32 to move along the extension direction of the second guide rail 362.

[0055] Specifically, the first guide rail 361 is set along a first preset direction, and the second guide rail 362 is set along a second preset direction, which is perpendicular to the first preset direction. For example, when the first preset direction is the length direction, the second preset direction is the width direction. The receiving assembly 30 also includes a mounting base, on which the second guide rail 362 and the receiving tray 32 are disposed. The mounting base is slidably connected to the first guide rail 361. The first driving member 311 is used to drive the mounting base to move along the first preset direction, and the first guide rail 361 is used to guide the movement direction of the mounting base. The receiving tray 32 is disposed on the mounting base via the second guide rail 362. The second driving member 312 is used to drive the receiving tray 32 to move along the second preset direction, and the second guide rail 362 is used to guide the movement direction of the receiving tray 32.

[0056] Therefore, the area on the receiving tray 32 can be divided into several receiving areas, and these receiving areas are arranged in an array on the receiving tray 32. For example, multiple rows of receiving areas are arranged along a first preset direction and multiple rows of receiving areas are arranged along a second preset direction to form an array of receiving areas. In this embodiment, the first driving member 311 drives the second guide rail 362 to move along the first preset direction, and the second driving member 312 drives the receiving tray 32 to move along the second preset direction, thereby adjusting the projection position of the discharge port 221 on the receiving tray 32. This results in the multi-segment material 321 flowing out of the discharge port 221 being arranged in an array on the receiving tray 32, thereby improving the utilization rate of the receiving tray 32 while reducing and preventing the mutual adhesion between the multi-segment material 321, further improving the reliability of the melt flow index test.

[0057] This application also provides a method for testing melt flow index, which is applied to the melt flow indexer 1 of any of the above embodiments. The testing method includes:

[0058] Step S11: Load the feed to be tested 21 into the receiving cavity of the molten material cylinder 20.

[0059] The test feed 21 is loaded into the receiving cavity of the molten material cylinder 20. Specifically, the test feed 21 can be poured into the molten material cylinder 20 through a feeding cylinder and a funnel. The pouring is stopped when the test feed 21 reaches the top of the molten material cylinder.

[0060] Step S12: Insert the piston rod 40 into the molten material cylinder 20 to compact the feed material 21 to be tested in the molten material cylinder 20.

[0061] After the feed material to be tested 21 is loaded into the molten material cylinder 20, the piston rod 40 is inserted into the molten material cylinder 20. The piston rod 40 can be controlled to move up and down multiple times so that the pressure is output to the feed material to be tested 21 through the pressure surface of the piston rod 40, so as to compact the feed material to be tested 21 in the molten material cylinder 20 through the piston rod 40.

[0062] Step S13: Add a mass 50 to the piston rod 40 so that the feed 21 to be tested flows out through the discharge port 221 and is cut under the pressure of the piston rod 40.

[0063] A mass 50 is added to the piston rod 40 so that the weight of the piston rod 40 and the mass 50 applies pressure to the feed 21 to be tested in the receiving cavity, so that the feed 21 to be tested flows out through the discharge port 221 under the pressure of the piston rod 40 and is cut by the scraper set at the discharge port 221. The cut material 321 falls from the discharge port 221.

[0064] Step S14: Control the receiving component 30 to move at a first preset speed so that the receiving component 30 sequentially receives the multi-segment material 321 flowing out of the material outlet 221, and the multi-segment material 321 is in a different position on the receiving tray 32.

[0065] Since the receiving component 30 is located below the discharge port 221, controlling the receiving component 30 to move at the first preset speed allows the receiving component 30 to continue moving and move the blank tray below the discharge port 221 to receive the second segment of material 321 after receiving the first segment of material 321 flowing out of the discharge port 221, thereby achieving different positions of multiple segments of material 321 on the receiving tray 32.

[0066] Step S15: Calculate the melt flow index of the feed 21 to be tested based on the mass of the multi-segment material 321.

[0067] After obtaining the multi-segment material 321, the mass of the multi-segment material 321 can be tested, and the melt index of the feed 21 to be tested can be calculated based on the mass of the multi-segment material 321.

[0068] Therefore, the testing method of this embodiment uses the receiving component 30 to move at a first preset speed and automatically receive the multi-segment material 321 flowing out during the test, so that the multi-segment material 321 is in different positions on the receiving tray 32, reducing or avoiding adhesion between the multi-segment material 321, improving the reliability of the melt flow index test, and eliminating the need for manual receiving operation by the user, thus improving the user experience.

[0069] In one embodiment, step S12 includes: inserting the piston rod 40 into the molten material cylinder 20; compacting the feed material 21 to be tested inside the molten material cylinder 20 by means of the piston rod 40; adding a mass 50 of a first weight to the piston rod 40 so that the feed material 21 to be tested is compacted under the pressure of the piston rod 40 and the material 321 of a preset length is exposed at the outlet 221 of the molten material cylinder 20.

[0070] After the test feed 21 is loaded into the molten material cylinder 20, the piston rod 40 is inserted into the molten material cylinder 20 and the piston rod 40 is controlled to move up and down multiple times so as to initially compact the test feed 21 in the molten material cylinder 20 through the piston rod 40. Because there are gaps between the test feed 21 inside the molten barrel 20, the friction of the test feed 21 is relatively small. After adding the first weight mass 50 to the piston rod 40, the pressure provided by the first weight mass 50 further compresses and compacts the test feed 21 inside the molten barrel 20, and the air in the gaps between the test feed 21 is expelled. Furthermore, as the test feed 21 is loaded in the molten barrel 20 for an extended period, the test feed 21 gradually heats and melts at the temperature of the molten barrel 20, becoming a molten feed. The gaps between the molten feeds further decrease, making it easier for the test feed 21 located at the lower end of the receiving cavity to be squeezed out of the discharge port 221 by the pressure of the piston rod 40 and exposed outside the discharge port 221. At this time, the extruded material flowing out through the discharge port 221 is defined as the discharge material 321. The discharge material 321 usually contains more air impurities and cannot meet the testing requirements.

[0071] Under the pressure of the first weight mass 50, the material density in the receiving cavity gradually increases, the gap between the molten feeds decreases, and the friction between the molten feeds increases, making it difficult for the test feed 21 located at the lower end of the receiving cavity to be squeezed out of the discharge port 221 by the pressure of the piston rod 40; when the pressure applied by the piston rod 40 and the first weight mass 50 is equal to the friction of the subsequent molten feeds, the subsequent test feed 21 is no longer squeezed out of the discharge port 221.

[0072] Therefore, when adding the first weight of the mass component 50 to the piston rod 40, it is necessary to ensure that the weight of the mass component 50 is sufficient to expose the pre-set length of the material drop 321 at the discharge port 221, while preventing the material drop 321 from continuing to fall. This reduces the impact on subsequent testing processes caused by excessive material loss due to the continuous falling of the material drop 321. In this way, the material to be tested 21 in the molten material cylinder 20 can be fully melted, improving the accuracy of subsequent tests on the molten material.

[0073] The first weight ranges from 2.16 kg to 10 kg. Since existing melt flow indexers 1 typically use standard test force weights as the mass component 50 during testing, the first weight mass component 50 can be selected from weights of grades 3 to 6. The first weight includes, but is not limited to, 2.16 kg, 3.8 kg, 5 kg, or 10 kg, and the pressure applied by the first weight mass component 50 includes, but is not limited to, 21.18 N, 37.26 N, 49.03 N, or 98.07 N. The preset length ranges from 1 cm to 10 cm. That is, when the first weight mass component 50 is added to the piston rod 40, the length of the material 321 exposed at the discharge port 221 is 1 cm, 2 cm, 3 cm, 4 cm, 5 cm, 6 cm, 7 cm, 8 cm, 9 cm, or 10 cm.

[0074] The testing method in this embodiment involves placing a mass 50 of the first weight into the piston rod 40 before testing to expel air from the molten material cylinder 20 and make the composition of the feed 21 to be tested more uniform, thereby improving the uniformity of the first sample to be tested, reducing the fluctuation of the melt index of the test, and improving the accuracy of the test results.

[0075] In one embodiment, step S13 includes: switching the mass 50 on the piston rod 40 from a first weight to a second weight, so that the feed 21 to be tested flows out through the discharge port 221 under the pressure of the piston rod 40 and is cut to obtain multiple segments of the first sample to be tested.

[0076] Specifically, after the gaps between the feed materials 21 to be tested are discharged and compacted by the mass component 50 of the first weight, the mass component 50 or a standard weight can be applied to the side of the piston rod 40 away from the molten material cylinder 20 to apply a first preset pressure to the feed materials 21 to be tested, and the melt index test of the feed materials 21 to be tested will begin. The feed materials 21 to be tested in the molten material cylinder 20 flow under the first preset pressure and flow out through the outlet 221. The material 321 flowing out of the outlet 221 is cut by a scraper at a preset speed to obtain multiple segments of the first test sample. The second weight is greater than the first weight so that the feed materials 21 to be tested can flow out through the outlet 221 under greater pressure.

[0077] In one embodiment, step S14 includes: when the first scale line of the piston rod 40 is flush with the upper end of the molten material cylinder 20, controlling the receiving component 30 to move at a first preset speed so that the receiving component 30 sequentially receives the first sample to be tested flowing out of the discharge port 221.

[0078] Specifically, one end of the piston rod 40 is inserted into the molten material cylinder 20 and contacts the feed material 21 to be tested, while the other end of the piston rod 40 contacts the mass component 50 to apply corresponding pressure to the feed material 21 under the action of the mass component 50. The piston rod 40 is provided with at least a first scale line and a second scale line, which respectively indicate different height positions of the piston rod 40 within the molten material cylinder 20. The second scale line is located above the first scale line. After the second weight of the mass component 50 is added to the piston rod 40, the feed material 21 to be tested is heated and melted within the molten material cylinder 20 and extruded from the outlet 221 of the die 22. The piston rod 40 slowly moves downward until the first scale line of the piston rod 40 is flush with the upper end of the molten material cylinder 20.

[0079] The upper end of the molten barrel 20 can be understood as the edge of the top opening of the molten barrel 20. Since the uniformity of the test feed 21 varies among different sections within the molten barrel 20, the melt index of the later test feed 21 is more instructive for the injection molding process. However, receiving the extruded material from the later test feed 21 can easily lead to insufficient feeding segments, resulting in excessive measurement randomness. Therefore, the testing method in this embodiment controls the receiving component 30 to move at a first preset speed when the first scale line of the piston rod 40 is aligned with the upper end of the molten barrel 20. This allows the receiving component 30 to sequentially receive the first test sample flowing out of the discharge port 221. Therefore, it ensures that the received first test sample belongs to the later section within the molten barrel 20, and fixing the receiving position ensures that the first test sample received each time is in the same section of the molten barrel 20, further reducing the fluctuation of the melt index, improving the uniformity of the first test sample, and thus improving the accuracy of the test results.

[0080] In one embodiment, step S14 includes: recording the number of cuts of the feed 21 to be tested; when the number of cuts of the feed 21 to be tested reaches a first preset value, controlling the receiving component 30 to move at a first preset speed so that the receiving component 30 sequentially receives the first sample to be tested flowing out of the feed port 221.

[0081] Specifically, when the test feed 21 is extruded through the discharge port 221 of the die 22 and cut by the scraper, the number of cuts of the test feed 21 is recorded simultaneously. Since the test feed 21 that can be contained in the molten barrel 20 is limited, the number of cuts that the test feed 21 in the molten barrel 20 can achieve is limited. The test method of this embodiment can control the receiving component 30 to receive the first test sample that has been cut and fallen when the number of cuts reaches a first preset value, so as to ensure that the first test sample received belongs to the later position in the molten barrel 20 and that the first test sample received each time is in the same section of the molten barrel 20. By fixing the receiving position of the first test sample, the fluctuation of the melt index is reduced, the uniformity of the first test sample is improved, and the accuracy of the test results is improved.

[0082] For example, when the test feed 21 in the molten barrel 20 can typically be cut 10 times, in order to test the melt index of the later section of the test feed 21, the test method of this embodiment can collect the test sample from the 4th cut by the die 22, so as to reduce the influence of the test feed 21 in the front section of the molten barrel 20 on the fluctuation of the melt index, and ensure that the first test sample collected each time belongs to the same section of the molten barrel 20.

[0083] In one embodiment, step S14 includes: recording the outflow time of the feed 21 to be tested; when the outflow time reaches a second preset value, controlling the receiving component 30 to move at a first preset speed so that the receiving component 30 sequentially receives the first sample to be tested flowing out of the feed port 221.

[0084] Specifically, when the feed material 21 to be tested is extruded through the die 22 and cut by the scraper, the time when the feed material 21 to be tested flows out of the die 22 is recorded simultaneously. Since the feed material 21 to be tested that can be contained in the molten barrel 20 is limited, and the outflow time of the feed material 21 to be tested is limited, the test method of this embodiment can control the receiving component 30 to receive the first sample to be tested flowing out of the die 22 when the outflow time of the feed material 21 to be tested reaches the second preset value, so as to ensure that the first sample to be tested received belongs to the later position in the molten barrel 20 and that the first sample to be tested received each time is in the same section of the molten barrel 20. By fixing the receiving position of the first sample to be tested, the fluctuation of the melt index is reduced, the uniformity of the first sample to be tested is improved, and the accuracy of the test results is improved.

[0085] For example, when the die 22 is set to cut once per second, and the test feed 21 in the molten barrel 20 takes 15 seconds from the start to the end of the test, in order to test the melt index of the later section of the test feed 21, the test method of this embodiment can control the receiving component 30 to pick up the first test sample after the scraper cuts for 5 seconds, so as to reduce the influence of the test feed 21 in the front section of the molten barrel 20 on the fluctuation of the melt index, and ensure that the first test sample picked up each time belongs to the same section of the molten barrel 20.

[0086] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A melt indexer characterized in that, The application relates to a molten index instrument, which comprises a base, a molten material cylinder arranged in the base, a receiving assembly arranged in the base, and a scraper arranged in the molten material cylinder. The molten material cylinder is provided with a communicating accommodating cavity and a discharge port, the accommodating cavity is used for storing a to-be-tested feed material, and the to-be-tested feed material flows out through the discharge port. The receiving assembly comprises a driving member and a receiving disc connected with each other, the receiving disc is located below the discharge port, the driving member is used for driving the receiving disc to move at a first preset speed, and the receiving disc sequentially receives a plurality of material segments flowing out of the discharge port, and the positions of the plurality of material segments on the receiving disc are different. The molten index instrument further comprises a scraper arranged in the discharge port, the scraper is used for cutting the to-be-tested feed material flowing out of the discharge port at a second preset speed, so as to obtain the plurality of material segments, and the second preset speed corresponds to the first preset speed.

2. The melt indexer of claim 1, wherein, The receiving assembly further comprises a connecting shaft, the driving member is connected with the receiving disc through the connecting shaft, and the driving member is used for driving the receiving disc to rotate at the first preset speed.

3. The melt indexer of claim 1, wherein, The projection of the discharge port on the receiving disc does not completely overlap with the projection of the connecting shaft on the receiving disc.

4. The melt indexer of claim 3, wherein, The center of the connecting shaft coincides with the center of the receiving disc.

5. The melt indexer of claim 4, wherein, The center of the connecting shaft does not coincide with the center of the receiving disc.

6. The melt indexer of claim 4, wherein, The driving member is used for driving the receiving position of the receiving disc to move along a spiral line, and the starting point of the spiral line coincides with the projection of the discharge port on the receiving disc.

7. The melt indexer of claim 3, wherein, The receiving assembly further comprises a transmission member and a transmission belt, the driving member is connected with the transmission belt through the transmission member, the receiving disc is arranged on the transmission belt, and the driving member is used for driving the receiving disc to move along a first preset direction.

8. The melt indexer of claim 1, wherein, The receiving assembly further comprises a guide rail, the receiving disc is arranged on the guide rail, and the driving member is used for driving the receiving disc to move along the extension direction of the guide rail.

9. The melt indexer of claim 1, wherein, The receiving assembly further comprises a first guide rail and a second guide rail, the receiving assembly comprises a first driving member and a second driving member, the second guide rail is slidably connected with the first guide rail, the receiving disc is arranged on the second guide rail, the first driving member is used for driving the second guide rail to move along the extension direction of the first guide rail, and the second driving member is used for driving the receiving disc to move along the extension direction of the second guide rail.

10. The melt indexer of claim 9, wherein, ​

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