A melt flow rate measuring apparatus and a measuring method

Abstract

The application relates to the technical field of melt flow rate measurement, and discloses a melt flow rate measurement device and a measurement method, which comprise a cylinder, a top rod, a first driving element, a second driving element, a motor and a die, wherein the cylinder is in a cylindrical structure; the top rod is a telescopic rod, and the top rod corresponds to the bottom opening of the cylinder; the first driving element is used for driving the top rod to move relative to the cylinder; the second driving element is used for driving the top rod to extend and retract; the motor is arranged on the movable end of the top rod, and the main shaft of the motor is connected with a rotating end; the die is arranged on the rotating end, and the rotating end blocks the die. When the die is assembled, the application does not have the problem of assembly jamming, and the die can be conveniently taken down and cleaned in time, so that the normal use of the application is not affected, and the convenience of application is improved.

Description

Technical Field

[0001] This invention relates to the field of melt flow rate measurement technology, and in particular to a melt flow rate measuring device and method. Background Technology

[0002] Melt flow rate is a key indicator for measuring the flow properties of thermoplastics under specific temperatures and loads, and it is widely used in plastics production, product quality control, and process optimization. Current melt flow rate measurement equipment obtains sample strips through extrusion, and then uses weighing to obtain relevant parameters, thereby completing the measurement.

[0003] The invention patent application with publication number CN101532939A discloses a device and method for testing the viscous dissipation of micro-sized polymer melt steady-state extrusion. In this technical solution, a capillary die is set inside the barrel. Currently, most measuring devices with this structure place the die above the barrel. However, since the die needs to fit tightly with the barrel, jamming problems can easily occur during the die placement process, making die placement inconvenient.

[0004] The existing utility model patent with authorization announcement number CN209878538U discloses a melt flow rate testing machine. In this technical solution, the die is placed from the bottom of the barrel, but it adopts an embedded structure, which makes it difficult to remove the die. At the same time, after the material strip is extruded, the die cannot be removed immediately due to the heating temperature. As the material solidifies, it will affect the subsequent cleaning work, resulting in inconvenience in use. Summary of the Invention

[0005] In view of this, the present invention proposes a melt flow rate measuring device and method with an easy-to-disassemble and easy-to-clean die, so as to solve the problems of inconvenient die installation and cleaning in existing melt flow rate measuring devices.

[0006] The technical solution of this invention is implemented as follows:

[0007] On one hand, the present invention provides a melt flow rate measuring device and method, including a barrel, a push rod, a first driving component, a second driving component, a motor, and a die, wherein,

[0008] The material cylinder has a cylindrical structure;

[0009] The push rod is a telescopic rod, and the push rod corresponds to the bottom opening of the material cylinder;

[0010] The first driving component is used to move the push rod relative to the material cylinder;

[0011] The second driving component is used to drive the push rod to extend or retract;

[0012] The motor is mounted on the movable end of the push rod, and the motor's main shaft is connected to a rotating end;

[0013] The die is set on the rotating end, and the rotating end seals the die.

[0014] Based on the above technical solutions, preferably, a connecting assembly is also included. The connecting assembly includes a base, a guide cylinder, a carrier, and a locking pin.

[0015] The base and the barrel are fixed relative to each other;

[0016] The guide tube is mounted on the base;

[0017] The carrier and the guide tube are slidably connected, and the end rod of the top rod is rotatably connected to the carrier;

[0018] The locking pin is installed on the carrier and locks the top rod;

[0019] The first driving component is mounted on the base, and the movable end of the first driving component is connected to the carrier frame.

[0020] Based on the above technical solutions, preferably, the second driving component includes an electric push rod, a ejector pin, a first spring, and a guide pin. The push rod has a first stepped hole.

[0021] The electric actuator is mounted on the base;

[0022] One end of the ejector pin is inserted into the first stepped hole, and the other end of the ejector pin abuts against the movable end of the electric push rod. The ejector pin is provided with a tapered part corresponding to the reduced diameter part of the first stepped hole, and a guide part and a limiting part are provided corresponding to the large diameter part of the first stepped hole.

[0023] The first spring is disposed inside the large diameter portion, with one end of the first spring abutting against the limiting portion and the other end of the first spring abutting against the ejector pin.

[0024] The guide pin passes through the ejector pin, corresponds to the locking pin and the reduced diameter section, and is perpendicular to the ejector pin.

[0025] Based on the above technical solutions, preferably, the locking pin includes a pin shaft, a baffle plate, and a first tension spring, wherein...

[0026] The pin slides with the carrier, and the end of the pin facing the guide pin is a ball head;

[0027] The baffle is located on the end of the pin furthest from the guide pin.

[0028] One end of the first tension spring abuts against the baffle, and the other end abuts against the carrier frame;

[0029] The guide pin has a groove and a guide slot corresponding to the pin shaft.

[0030] Based on the above technical solutions, preferably, the movable end and the end rod are slidably fitted, and the ejector pin is provided with a connecting rod connecting the tapered part, an elastic rod connecting the connecting rod, and an end rod connecting the elastic rod, wherein...

[0031] The connecting rod and the elastic rod are installed inside the end rod;

[0032] The end rod is a rigid rod, with one end inserted into the end rod and the other end inserted into the movable end.

[0033] Based on the above technical solutions, preferably, the connecting component further includes a second tension spring, with one end of the rotating end extending and sleeved on the movable end;

[0034] One end of the second tension spring is connected to the movable end, and the other end of the second tension spring is connected to the end rod.

[0035] Based on the above technical solutions, preferably, the tension of the second tension spring is less than the elastic force of the elastic rod.

[0036] Based on the above technical solutions, preferably, the system also includes an assembly assembly, which comprises a base plate, a top plate, a guide rod, an insert, and a second spring.

[0037] The base plate is set on the rotating end, and the base plate is fixed relative to the rotating end;

[0038] The top plate is fitted onto the rotating end, and the top plate and the rotating end are in sliding fit.

[0039] One end of the guide rod is connected to the top plate, and the other end of the guide rod is slidably fitted to the bottom plate;

[0040] The insert is set on the top plate and fits into the die.

[0041] The second spring is sleeved on the rotating end, with one end of the second spring abutting against the bottom plate and the other end of the second spring abutting against the top plate.

[0042] Based on the above technical solutions, preferably, the system also includes a weight assembly, which comprises a weight rod and weight blocks, wherein...

[0043] One end of the weight rod is inserted into the material cylinder;

[0044] The weight block is set on the other end of the weight rod. One end of the weight block is provided with a second stepped hole, and the other end of the weight block is provided with a protrusion.

[0045] There are multiple weight blocks, and the diameter of the weight blocks increases sequentially.

[0046] On the other hand, the present invention provides a measurement method using the above-mentioned melt flow rate measuring device, comprising the following steps:

[0047] S1. Place the die onto the rotating end;

[0048] S2. The first driving component drives the ejector rod and the die to move toward the barrel, and at the same time, the motor drives the rotating end and the die to rotate, so that the die and the barrel are connected by screw thread.

[0049] S3. Insert the weight rod into the material cylinder, and then heat the material cylinder;

[0050] S4. After the material cylinder is heated to the test temperature, remove the weight rod and add material into the material cylinder, then insert the weight rod back in.

[0051] S5. Add weight blocks to the weight bar;

[0052] S6. The second driving component drives the movable end to move, so that the rotating end enters the barrel. The rotating end, in conjunction with the end of the weight rod, squeezes the material to accelerate the material's melting speed. S7. The first driving component drives the ejector rod away from the die, and then the material is extruded to achieve detection.

[0053] The melt flow rate measuring device and method of the present invention have the following advantages over the prior art:

[0054] (1) By setting a first driving component to drive the push rod to move, setting a motor to drive the movable end to rotate, and setting the die on the push rod, the die can be automatically moved to the bottom of the barrel, and the die can be screwed into the bottom of the barrel under the drive of the motor. This way, there will be no problem of assembly jamming, and it is also easy to remove and clean in time to avoid affecting the normal use in the future, thus improving the convenience of application.

[0055] (2) By setting the top rod as a telescopic rod and providing a second driving component to drive the top rod to extend and retract, the top rod can be inserted into the inside of the material cylinder. With the help of the motor drive, the rotating end can effectively cooperate with the weight assembly to pressurize the material in the material cylinder, which is conducive to the material achieving rapid and uniform heat melting. Thus, there is no need to pressurize the material with a pressure rod, which further improves the convenience of application.

[0056] (3) By setting the connecting components, the carrier can drive the top rod to slide along the guide cylinder, and the top rod can continue to be positioned by the locking pin. Since the end rod of the top rod is rotatably connected to the carrier, the top rod will tilt to one side after the locking pin is released, thus avoiding affecting the material extrusion.

[0057] (4) The second driving component is equipped with a push pin, a first spring and a guide pin. When the push pin moves, it can push the guide pin to push out the locking pin and achieve automatic unlocking. At the same time, since the guide pin has a groove and a guide groove, after the locking pin is pushed out, the locking pin will press against the guide pin under the action of the first spring. Then, under the action of the guide groove, the push pin will automatically tilt to one side, thus improving the convenience of application.

[0058] (5) By setting an elastic rod in the ejector pin, when the ejector pin drives the rotating end into the barrel and holds the material, the elastic rod will be compressed as the electric push rod continues to pressurize. As the material melts, the elastic rod will gradually extend and continue to pressurize, which is beneficial to promote the rapid melting of the material.

[0059] (6) By setting up the assembly components, it is convenient to fit the die through the top plate and move the top plate and the die synchronously under the action of the second spring so that the die abuts against the bottom of the barrel. Then, the top plate, bottom plate, guide rod and die can be driven by the motor to rotate synchronously so that the die and the barrel can be screwed together, which improves the convenience of disassembly and assembly. Attached Figure Description

[0060] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0061] Figure 1 This is a perspective view of a melt flow rate measuring device according to the present invention;

[0062] Figure 2 For the present invention Figure 1 Enlarged view of the structure at point A in the middle;

[0063] Figure 3 This is a front view of a melt flow rate measuring device according to the present invention;

[0064] Figure 4 This is a structural diagram of the ejector rod and die separation of a melt flow rate measuring device according to the present invention;

[0065] Figure 5 This is a structural diagram of the fitting of the push rod and connecting assembly in a melt flow rate measuring device according to the present invention;

[0066] Figure 6 This is a cross-sectional view of a melt flow rate measuring device according to the present invention;

[0067] Figure 7 For the present invention Figure 6Enlarged view of the structure at point B;

[0068] Figure 8 For the present invention Figure 6 Enlarged view of the structure at point C;

[0069] Figure 9 This is a cross-sectional view of the melt flow rate measuring device of the present invention, showing its structure separated from the die.

[0070] Figure 10 This is a cross-sectional view of the push rod and connecting assembly of a melt flow rate measuring device according to the present invention;

[0071] Figure 11 This is a structural diagram showing the separation of the die and assembly components of a melt flow rate measuring device according to the present invention;

[0072] Figure 12 This is a structural diagram of the guide pin and pin shaft separation of a melt flow rate measuring device according to the present invention;

[0073] In the diagram: 1. Barrel; 2. Push rod; 21. Movable end; 22. Rotating end; 23. End rod; 201. First stepped hole; 2011. Reducing diameter section; 2012. Large diameter section; 3. First driving component; 4. Second driving component; 41. Electric push rod; 42. Ejector pin; 421. Tapered section; 422. Guide section; 423. Limiting section; 424. Connecting rod; 425. Elastic rod; 426. End rod; 43. First spring; 44. Guide pin; 401. Groove ; 402, guide groove; 5, motor; 6, die; 7, connecting assembly; 71, base; 72, guide cylinder; 73, carrier; 74, locking pin; 741, pin shaft; 742, baffle; 743, first tension spring; 75, second tension spring; 8, assembly assembly; 81, base plate; 82, top plate; 83, guide rod; 84, insert; 85, second spring; 9, weight assembly; 91, weight rod; 92, weight block; 921, protrusion; 901, second stepped hole. Detailed Implementation

[0074] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0075] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0076] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0077] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0078] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0079] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0080] like Figures 1-12As shown, the melt flow rate measuring device of the present invention includes a barrel 1, a push rod 2, a first driving component 3, a second driving component 4, a motor 5, a die 6, a connecting assembly 7, an assembly assembly 8, and a weight assembly 9.

[0081] like Figures 1-6 As shown, the material cylinder 1 has a cylindrical structure; the push rod 2 is a telescopic rod, and the push rod 2 corresponds to the bottom opening of the material cylinder 1; the first driving member 3 is used to drive the push rod 2 to move relative to the material cylinder 1; the second driving member 4 is used to drive the push rod 2 to extend and retract; the motor 5 is set on the movable end 21 of the push rod 2, and the main shaft of the motor 5 is connected to the rotating end 22; the die 6 is set on the rotating end 22, and the rotating end 22 seals the die 6;

[0082] As described above, the material cylinder 1 is a cylindrical structure with openings at both the top and bottom. The upper end is used to feed material particles into the cylinder, while the lower end is used to assemble the die 6 and extrude material strips.

[0083] The push rod 2 is positioned opposite to the material cylinder 1, and the push rod 2 is equipped with a die 6. Thus, when the push rod 2 moves the die 6, the die 6 can be moved to the lower opening of the material cylinder 1.

[0084] The first driving component 3 is used to drive the push rod 2 and the die 6 to move so that the die 6 corresponds to the lower end opening of the barrel 1.

[0085] The second driving component 4 is used to drive the push rod 2 to extend and retract. After the die 6 is assembled to the lower opening of the material cylinder 1, the second driving component 4 allows the push rod 2 to extend into the material cylinder 1, thereby pushing the material and increasing the hot melting rate of the material.

[0086] The push rod 2 is equipped with a movable end 21, which is used to move the die 6. To facilitate the assembly of the die 6, a motor 5 is provided on the movable end 21. The main shaft of the motor 5 is connected to the rotating end 22, so that the die 6 can be placed on the rotating end 22. After the lower end of the material cylinder 1 is provided with an internal thread and the outer side of the die 6 is provided with an external thread, the rotating end 22 can drive the die 6 to rotate, thereby making the die 6 screwed into the material cylinder 1, or removing the die 6 from the lower end of the material cylinder 1. This realizes the automated assembly of the die 6, which will not cause the die 6 to jam during assembly, and it is also convenient to remove the die 6 in time after the work is completed, thus facilitating the cleaning work.

[0087] Furthermore, when the second driving component 4 moves, the rotating end 22 can be moved into the inside of the material cylinder 1. At this time, the motor 5 drives the rotating end 22 to rotate, which can move the material in the material cylinder 1, further improving the uniformity and melting rate of the material.

[0088] Specifically, heating wires can be installed on the rotating end 22 and the inner wall of the barrel 1 for the hot melting of materials.

[0089] Specifically, the first driving component 3 and the second driving component 4 adopt linear displacement components such as electric push rods.

[0090] like Figure 2 and Figure 10 As shown, the connecting assembly 7 includes a base 71, a guide cylinder 72, a carrier frame 73, and a locking pin 74. The base 71 is fixed relative to the material cylinder 1; the guide cylinder 72 is disposed on the base 71; the carrier frame 73 is slidably engaged with the guide cylinder 72, and the end rod 23 of the push rod 2 is rotatably connected to the carrier frame 73; the locking pin 74 is disposed on the carrier frame 73 and locks the push rod 2; the first driving member 3 is disposed on the base 71, and the movable end of the first driving member 3 is connected to the carrier frame 73.

[0091] As described above, the connecting component 7 is used to support the movement of the push rod 2;

[0092] The base 71 is fixed relative to the material cylinder 1, the guide cylinder 72 is fixedly installed on the base 71, the carrier 73 is connected to the push rod 2, and the carrier 73 and the guide cylinder 72 are slidably engaged. Thus, when the first driving member 3 drives the carrier 73 to move, it will simultaneously drive the push rod 2 and the die 6 to move, so as to adjust the distance between them and the material cylinder 1.

[0093] The ejector rod 2 and the carrier 73 are connected by a rotating engagement. After the ejector rod 2 is disengaged from the die 6, it can rotate to one side to avoid the lower space of the material barrel 1, so that the material strip can be extruded and interference problems can be prevented.

[0094] The ejector rod 2 is stably fixed to the carrier 73 by the locking pin 74 to prevent the ejector rod 2 from deflecting. This makes it easier for the first driving component 3 to drive the ejector rod 2 to move the die 6 to the lower opening of the material cylinder 1. When the ejector rod 2 needs to make way, the locking pin 74 can be released.

[0095] like Figure 6 and Figure 7As shown, the second driving component 4 includes an electric push rod 41, a ejector pin 42, a first spring 43, and a guide pin 44. The push rod 2 has a first stepped hole 201. The electric push rod 41 is mounted on the base 71. One end of the ejector pin 42 is inserted into the first stepped hole 201, and the other end of the ejector pin 42 abuts against the movable end of the electric push rod 41. The ejector pin 42 has a tapered portion 421 corresponding to the reduced diameter portion 2011 of the first stepped hole 201, and a guide portion 422 and a limiting portion 423 corresponding to the large diameter portion 2012 of the first stepped hole 201. The first spring 43 is mounted in the large diameter portion 2012, with one end abutting against the limiting portion 423 and the other end abutting against the ejector pin 42. The guide pin 44 passes through the push rod 2 and corresponds to the locking pin 74 and the reduced diameter portion 2011, and the guide pin 44 is perpendicular to the ejector pin 42.

[0096] As described above, the electric push rod 41 is mounted on the base 71, and its movable end abuts against the ejector pin 42. The ejector pin 42 is inserted into the fixed ejector rod 2. Thus, when the electric push rod 41 moves, it will drive the movable end 21 of the ejector rod 2 to move through the ejector pin, thereby realizing the extension and retraction of the ejector rod 2.

[0097] Specifically, a first stepped hole 201 is provided at the lower end of the push rod 2. The first stepped hole 201 has a reduced diameter portion 2011 and a large diameter portion 2012, which correspond to the tapered portion 421, guide portion 422 and limiting portion 423 of the push pin 42.

[0098] In this design, the tapered portion 421 of the push rod 2 is located within the reduced-diameter portion 2011, and a guide pin 44 is provided on the push rod 2 corresponding to the reduced-diameter portion 2011. Thus, when the push pin 42 moves, it will... Figure 10 As shown, by ejecting the guide pin 44, and then ejecting the locking pin 74 through the guide pin 44, the limiting effect of the locking pin 74 on the ejector rod 2 can be released, and the ejector rod 2 can tilt to one side; when the rotating end 22 is inserted into the die 6, the ejector rod 2 will not tilt, only when the second driving member 4 drives the ejector rod 2 away from the die 6, thus achieving the desired tilt. Figure 4 As shown in the figure, when the electric push rod 41 moves the ejector pin 42, the push rod 2 will tilt, thus ensuring the stability of the action;

[0099] The guide part 422 is slidably engaged with the reduced diameter part 2011 of the first stepped hole 201, and the limiting part 423 is slidably engaged with the large diameter part 2012 of the first stepped hole 201, so as to facilitate the installation of the first spring 43. In this way, the first spring 43 can be used to realize the automatic reset of the downward movement of the ejector pin 42, thereby improving the convenience of application.

[0100] like Figure 10 and Figure 12As shown, the locking pin 74 includes a pin 741, a baffle 742, and a first tension spring 743. The pin 741 is slidably engaged with the carrier frame 73, and the end of the pin 741 facing the guide pin 44 is a ball head. The baffle 742 is disposed on the end of the pin 741 away from the guide pin 44. One end of the first tension spring 743 abuts against the baffle 742, and the other end abuts against the carrier frame 73. The guide pin 44 has a groove 401 and a guide groove 402 corresponding to the pin 741.

[0101] As described above, the pin 741 is slidably engaged with the carrier 73, and a baffle 742 is provided on the pin 741. The baffle 742 is connected to the carrier 73 through a first tension spring 743. Thus, under the tension of the first tension spring 743, the pin 741 will automatically push against the guide pin 44. After the ejector pin 42 releases its resistance to the guide pin 44, the pin 741 can push the guide pin 44 back, thereby fixing the ejector rod 2 to the carrier 73.

[0102] The guide pin 44 is provided with a groove 401 and a guide groove 402. When the pin 741 holds the guide pin 44, the ball head of the pin 741 cooperates with the groove 401. After the guide pin 44 is pushed out by the ejector pin 42, under the sliding guidance of the guide groove 402 and the ball head of the pin 741, the ejector rod 2 will automatically tilt to one side, thereby flowing out of the extrusion space of the material strip to ensure the convenience of application.

[0103] like Figure 7 and Figure 10 As shown, the movable end 21 is slidably engaged with the end rod 23. The ejector pin 42 is provided with a connecting rod 424 connecting the tapered part 421, an elastic rod 425 connecting the connecting rod 424, and an end rod 426 connecting the elastic rod 425. The connecting rod 424 and the elastic rod 425 are disposed inside the end rod 23. The end rod 426 is a rigid rod, with one end of the end rod 426 inserted into the end rod 23 and the other end inserted into the movable end 21.

[0104] As described above, the movable end 21 is slidably engaged with the end rod 23, and the ejector pin 42 is provided with a connecting rod 424, an elastic rod 425, and an end rod 426. The end rod 426 abuts against the movable end 21. Thus, when the electric push rod 41 drives the ejector pin 42 to move, it will also push the movable end 21 to move, thereby adjusting the distance between the die 6 and the lower end of the barrel 1, thereby further improving the ease of installation of the die 6. This also allows the rotating end 22 to penetrate deeper into the barrel 1 to achieve material extrusion. At this time, although the guide pin 44 is ejected, the ejector pin 2 will not tilt due to the insertion and positioning of the rotating end 22 and the die 6.

[0105] Furthermore, when the material is first added, it is relatively hard. After the counterweight component is inserted above the material cylinder 1, when the rotating end 22 of the push rod 2 extends into the material cylinder 1, the elastic rod 425 will be compressed under pressure. As the material melts, the elastic rod 425 will gradually extend to continuously provide pushing force to the material, thereby ensuring that the material melts evenly.

[0106] The end rod 426 of the ejector pin 42 is set as a rigid rod, with one end inserted into the end rod 23 and the other end inserted into the movable end 21. This helps to increase the radial structural strength at the connection between the movable end 21 and the end rod 23, so as to ensure application stability.

[0107] like Figure 2 As shown, the connecting assembly 7 also includes a second tension spring 75, one end of the rotating end 22 extends and is sleeved on the movable end 21; one end of the second tension spring 75 is connected to the movable end 21, and the other end of the second tension spring 75 is connected to the end rod 23.

[0108] As described above, by setting a second tension spring 75, it is convenient to automatically reset after the movable end 21 is pushed out by the ejector pin 42, so as to avoid the ejector rod 2 not being able to completely disengage from the die 6 and the barrel 1 when it moves, thereby ensuring the stability of the application.

[0109] The rotating end 22 extends and is sleeved on the movable end 21 to improve the radial structural strength of the push rod 2, avoid radial force on the main bearing of the motor 5, and thus ensure the stability of the application.

[0110] Furthermore, the tension of the second tension spring 75 is less than the elastic force of the elastic rod 425;

[0111] In this way, the situation where the elastic rod 425 is compressed when the ejector pin 42 moves, but the movable end 21 is not extended, can be avoided. After the elastic rod 425 is compressed and then extends as the material melts, the ejector pin 42 retracts, and the movable end 21 is pulled back to its original position by the second tension spring 75.

[0112] like Figure 2 , Figure 7 , Figure 10 and Figure 11 As shown, the assembly component 8 includes a base plate 81, a top plate 82, a guide rod 83, an insert 84, and a second spring 85. The base plate 81 is disposed on the rotating end 22 and is fixed relative to the rotating end 22. The top plate 82 is sleeved on the rotating end 22 and is slidably engaged with the rotating end 22. One end of the guide rod 83 is connected to the top plate 82, and the other end of the guide rod 83 is slidably engaged with the base plate 81. The insert 84 is disposed on the top plate 82 and is fitted with the die 6. The second spring 85 is sleeved on the rotating end 22, with one end of the second spring 85 abutting against the base plate 81 and the other end of the second spring 85 abutting against the top plate 82.

[0113] As described above, in order to ensure the normal installation of the die 6 without affecting the extension and retraction of the ejector pin 2, an assembly component 8 is provided.

[0114] Among them, the bottom plate 81 is fixed to the rotating end 22, the top plate 82 is slidably engaged with the bottom plate 81 through the guide rod 83, and is automatically reset by the second spring 85. The top plate 82 is provided with an insert 84 for fitting the die 6, so as to achieve relative circumferential positioning between the die 6, the top plate 82, the bottom plate 81 and the rotating end 22.

[0115] During assembly, the ejector pin 42 can drive the movable end 21, motor 5, rotating end 22 and die 6 to move towards the lower end of the barrel 1. Alternatively, the first driving component 3 can drive the ejector rod 2 and die 6 to move towards the lower end of the barrel 1. Then, the motor 5 will drive the rotating end 22 to rotate, and then the rotating end 22 will drive the base plate 81, guide rod 83, top plate 82 and die 6 to rotate, so as to connect the die 6 with the barrel 1.

[0116] When the rotating end 22 needs to be inserted into the barrel 1, the bottom plate 81 on the rotating end 22 will slide with the guide rod 83, and the second spring 85 will be compressed to avoid interference. Of course, if the rotating end 22 needs to rotate to speed up the mixing of materials, the die 6 will rotate synchronously. In order to avoid wear of the die 6, it is preferable to only let the rotating end 22 apply a top force to the material. Only when the material cannot reach the hot melt state for a long time can the rotating end 22 be rotated back and forth to speed up the hot melt of the material.

[0117] like Figure 6 and Figure 8 As shown, the weight assembly 9 includes a weight rod 91 and a weight block 92. One end of the weight rod 91 is inserted into the material cylinder 1. The weight block 92 is disposed on the other end of the weight rod 91. One end of the weight block 92 is provided with a second stepped hole 901, and the other end of the weight block 92 is provided with a protrusion 921. Multiple weight blocks 92 are provided, and the diameter of the multiple weight blocks 92 increases sequentially.

[0118] As described above, the weight rod 91 is a counterweight component. One end of it is inserted into the material cylinder 1, and the other end is used to install the weight block 92. One end of the weight block 92 is provided with a second stepped hole 901, and the other end is provided with a protrusion 921. In this way, the two weight blocks 92 can be assembled by fitting them together through the second stepped hole 901. With the fixing of the protrusion 921, the stable positioning between the two weight blocks 92 can be achieved to ensure the stability of the application.

[0119] The measurement method of the melt flow rate measuring device described above in this invention includes the following steps:

[0120] S1. Place the die 6 onto the rotating end 22;

[0121] S2. The first driving component 3 drives the push rod 2 and the die 6 to move toward the barrel 1. At the same time, the motor 5 drives the rotating end 22 and the die 6 to rotate, so that the die 6 and the barrel 1 are connected by threaded engagement.

[0122] S3. Insert the weight rod 91 into the material cylinder 1, and then heat the material cylinder 1;

[0123] S4. After the material cylinder 1 is heated to the test temperature, take out the weight rod 91, add material into the material cylinder 1, and then insert the weight rod 91 back in.

[0124] S5. Add weight block 92 to weight rod 91;

[0125] S6. The second driving component 4 drives the movable end 21 to move, so that the rotating end 22 enters the material cylinder 1. The rotating end 22 cooperates with the end of the weight rod 91 to squeeze the material, so as to accelerate the material's hot melting speed.

[0126] S7. The first driving component 3 drives the ejector rod 2 away from the die 6, and then the material is extruded to achieve detection.

[0127] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A melt flow rate measuring device, characterized in that: It includes a barrel (1), a push rod (2), a first drive component (3), a second drive component (4), a motor (5), a die (6), and a connecting assembly (7), wherein, The material cylinder (1) has a cylindrical structure; The top rod (2) is a telescopic rod, the top rod (2) has a first stepped hole (201), and the top rod (2) corresponds to the bottom opening of the material cylinder (1); The first driving member (3) is used to drive the top rod (2) to move relative to the material cylinder (1); The second driving member (4) is used to drive the top rod (2) to extend and retract; The motor (5) is mounted on the movable end (21) of the top rod (2), and the main shaft of the motor (5) is connected to the rotating end (22). The die (6) is disposed on the rotating end (22), and the rotating end (22) blocks the die (6). The connecting assembly (7) includes a base (71), a guide cylinder (72), a carrier (73), and a locking pin (74). The base (71) is fixed relative to the material cylinder (1). The guide cylinder (72) is disposed on the base (71). The carrier (73) is slidably engaged with the guide cylinder (72). The end rod (23) of the push rod (2) is rotatably connected to the carrier (73). The locking pin (74) is disposed on the carrier (73) and locks the push rod (2). The second driving component (4) includes an electric push rod (41), a pin (42), and a guide pin (44). The electric push rod (41) is mounted on the base (71). One end of the pin (42) is inserted into the first stepped hole (201), and the other end of the pin (42) abuts against the movable end of the electric push rod (41). The pin (42) is provided with a tapered portion (421) corresponding to the reduced diameter portion (2011) of the first stepped hole (201). The pin (42) is provided with a guide portion (422) and a limiting portion (423) corresponding to the large diameter portion (2012) of the first stepped hole (201). The guide pin (44) passes through the push rod (2). The guide pin (44) corresponds to the locking pin (74) and the reduced diameter portion (2011), and the guide pin (44) is perpendicular to the pin (42). The locking pin (74) includes a pin (741), a baffle (742), and a first tension spring (743). The pin (741) is slidably engaged with the carrier (73), and the end of the pin (741) facing the guide pin (44) is a ball head. The baffle (742) is disposed on the end of the pin (741) away from the guide pin (44). One end of the first tension spring (743) abuts against the baffle (742), and the other end abuts against the carrier (73). When the ejector pin (42) moves, it pushes out the guide pin (44), and then pushes out the locking pin (74) through the guide pin (44), releasing the locking pin (74) from limiting the ejector rod (2), and the ejector rod (2) tilts to one side.

2. The melt flow rate measuring device as described in claim 1, characterized in that: The first drive member (3) is disposed on the base (71), and the movable end of the first drive member (3) is connected to the carrier (73).

3. The melt flow rate measuring device as described in claim 2, characterized in that: The second driving member (4) further includes a first spring (43), wherein, The first spring (43) is disposed in the large diameter portion (2012), one end of the first spring (43) abuts against the limiting portion (423), and the other end of the first spring (43) abuts against the ejector pin (42).

4. The melt flow rate measuring device as described in claim 3, characterized in that: The guide pin (44) has a groove (401) and a guide groove (402) corresponding to the pin (741).

5. The melt flow rate measuring device as described in claim 3, characterized in that: The movable end (21) is slidably engaged with the end rod (23). The ejector pin (42) is provided with a connecting rod (424) connecting the tapered part (421), an elastic rod (425) connecting the connecting rod (424), and an end rod (426) connecting the elastic rod (425). The connecting rod (424) and the elastic rod (425) are disposed within the end rod (23); The end rod (426) is a rigid rod. One end of the end rod (426) is inserted into the end rod (23), and the other end is inserted into the movable end (21).

6. The melt flow rate measuring device as described in claim 5, characterized in that: The connecting assembly (7) also includes a second tension spring (75), one end of the rotating end (22) extending and sleeved on the movable end (21); One end of the second tension spring (75) is connected to the movable end (21), and the other end of the second tension spring (75) is connected to the end rod (23).

7. The melt flow rate measuring device as described in claim 6, characterized in that: The tension of the second tension spring (75) is less than the elastic force of the elastic rod (425).

8. The melt flow rate measuring device according to any one of claims 1 to 7, characterized in that: It also includes an assembly assembly (8), which comprises a base plate (81), a top plate (82), a guide rod (83), an insert (84), and a second spring (85), wherein, The base plate (81) is disposed on the rotating end (22), and the base plate (81) and the rotating end (22) are fixed relative to each other; The top plate (82) is sleeved on the rotating end (22), and the top plate (82) and the rotating end (22) are in sliding fit; One end of the guide rod (83) is connected to the top plate (82), and the other end of the guide rod (83) is slidably engaged with the bottom plate (81); The insert (84) is disposed on the top plate (82), and the insert (84) is fitted with the die (6); The second spring (85) is sleeved on the rotating end (22), one end of the second spring (85) abuts against the bottom plate (81), and the other end of the second spring (85) abuts against the top plate (82).

9. The melt flow rate measuring device according to any one of claims 1 to 7, characterized in that: It also includes a weight assembly (9), which comprises a weight rod (91) and a weight block (92), wherein, One end of the weight rod (91) is inserted into the material cylinder (1); The weight block (92) is disposed on the other end of the weight rod (91). One end of the weight block (92) is provided with a second stepped hole (901), and the other end of the weight block (92) is provided with a protrusion (921). Multiple weight blocks (92) are provided, and the diameters of the multiple weight blocks (92) increase sequentially.

10. A measurement method using the melt flow rate measuring device as described in claim 9, characterized in that, Includes the following steps: S1. Place the die (6) onto the rotating end (22); S2. The first driving member (3) drives the push rod (2) and the die (6) to move toward the barrel (1), and at the same time, the motor (5) drives the rotating end (22) and the die (6) to rotate, so that the die (6) and the barrel (1) are connected by screw thread. S3. Insert the weight rod (91) into the material cylinder (1) and then heat the material cylinder (1). S4. After the material cylinder (1) is heated to the test temperature, the weight rod (91) is taken out and material is added into the material cylinder (1), and then the weight rod (91) is inserted back in. S5. Add the weight block (92) to the weight rod (91); S6. The second driving member (4) drives the movable end (21) to move, so that the rotating end (22) enters the material cylinder (1). The rotating end (22) cooperates with the end of the weight rod (91) to squeeze the material, so as to accelerate the material melting speed. S7. The first driving member (3) drives the push rod (2) away from the die (6), and then the material is extruded to achieve detection.

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