Polyurethane foaming experimental device

Abstract

The utility model belongs to the technical field of foaming, and particularly relates to a polyurethane foaming experiment device which comprises a foaming box, a base, a mixing barrel, a stirring rod and a monitoring system, the foaming box is of an open structure, and a top support is arranged at the opening and used for foaming polyurethane foam materials; the base is fixedly arranged on a top support of the foaming box and used for containing and heating foam materials. The mixing barrel is arranged in the base in a lifting manner and is used for adding different soaking materials; the stirring rod is nested in the material mixing barrel, and when the material mixing barrel rises, the stirring rod stirs the foam materials in the base; and the monitoring system is used for measuring various data in the polyurethane foaming process in real time. The polyurethane foaming experimental device disclosed by the utility model integrates batching, mixing, heating, injecting and foaming, is simple and convenient to operate, and can be used for measuring multiple items of data in the foaming process of foam materials.

Description

Technical Field

[0001] The utility model belongs to the technical field of foaming, and in particular relates to a polyurethane foaming experimental device. Background Art

[0002] The polyurethane foaming reaction is a rapid, real-time process. During the foaming process, the morphology of the polyurethane foam changes rapidly and a large amount of heat is released. To determine the material parameters, foaming experiments are necessary. During foaming experiments, conventional workstations cannot simultaneously perform mixing and foaming operations, nor can they fully and real-time record the foaming process data.

[0003] In the prior art, Chinese patent publication number CN112666204A discloses a thermal expansion foaming tester and a testing method thereof, which can only measure one data, namely, the foaming height of a sample. Summary of the Invention

[0004] The purpose of the utility model is to solve the problems of incomplete measurement data obtained in the current polyurethane foaming experiment and the inability to mix and foam at the same time. A polyurethane foaming experimental device is proposed, which integrates batching, mixing, heating, injection and foaming in one, is simple and convenient to operate, and can measure multiple data of the foaming process of the foam material.

[0005] In order to achieve the above purpose, the technical solutions adopted are:

[0006] The utility model provides a polyurethane foaming experimental device, comprising:

[0007] The foaming box is an open structure with a top support provided at the open portion for foaming polyurethane foam;

[0008] A base, which is fixedly arranged on the top bracket of the foaming box and is used for containing and heating the foaming material;

[0009] A mixing barrel, which is movably arranged in the base and is used for adding different foaming materials;

[0010] A stirring rod is nested in the mixing barrel, and when the mixing barrel is raised, the stirring rod stirs the foam material in the base;

[0011] And a monitoring system for real-time measurement of various data during the polyurethane foaming process.

[0012] According to the polyurethane foaming experimental device of the present invention, the interior of the mixing barrel is further evenly divided into multiple chambers by partitions, a embedding groove is opened in the lower part of each partition, a through hole is formed at the connection of all partitions, and the embedding groove of each partition is connected to the through hole.

[0013] According to the polyurethane foaming experimental device of the present invention, further, the outer diameter of the mixing barrel is smaller than the inner diameter of the base; and each chamber of the mixing barrel is engraved with a scale.

[0014] According to the polyurethane foaming experimental device of the present invention, further, a handle is provided at the top of the stirring rod, the stirring rod passes through the through hole in the center of the mixing barrel, and a stirring blade is provided at the bottom of the stirring rod, which is received in the embedded groove of each partition before stirring.

[0015] According to the polyurethane foaming experimental device of the present invention, further, a cylindrical plug is provided at the bottom end of the stirring rod, a base circular hole is opened at the center of the base, and the cylindrical plug is filled in the base circular hole before injection.

[0016] According to the polyurethane foaming experimental device of the present invention, further, a bracket circular hole is opened on the top bracket, the bracket circular hole is concentric with the base circular hole, and the bracket circular hole has a larger diameter than the base circular hole.

[0017] According to the polyurethane foaming experimental device of the present invention, further, the outer wall of the base is wrapped with a circle of heating belt.

[0018] According to the utility model polyurethane foaming experimental device, further, an L-shaped fixing bracket is provided on the top of one side plate of the foaming box, a rotating motor is hung at the end of the horizontal part of the fixing bracket, and the output end of the rotating motor is connected and fixed to the handle of the stirring rod.

[0019] According to the polyurethane foaming experimental device of the present invention, further, a plurality of adjustment holes are opened on the vertical portion of the fixed bracket; a connecting bracket is fixedly provided on the outer wall of the mixing barrel close to the fixed bracket, and the connecting bracket is inserted into any of the adjustment holes.

[0020] According to the polyurethane foaming experimental device of the present invention, the monitoring system further includes a laser rangefinder, a thermal imager, a weighing sensor and a control computer. The laser rangefinder and thermal imager are installed on the top bracket of the foaming box, and the weighing sensor is arranged on the bottom plate of the foaming box. The laser rangefinder, thermal imager and weighing sensor transmit the measured data to the control computer.

[0021] The beneficial effects achieved by adopting the above technical solution are:

[0022] 1. The polyurethane foaming experimental device of the utility model integrates batching, mixing, heating, injection and foaming, and can achieve full mixing of multiple foaming materials and inject them into the foaming box for foaming of polyurethane foam. The experimental device has high integration, low cost, simple and convenient operation, and reduces the occupation of experimental site.

[0023] 2. To simulate and analyze polyurethane in a foaming chamber, foaming experiments are required to obtain material parameters. During the polyurethane foaming experiment, laser rangefinders, thermal imagers, and weighing sensors are used to measure the foam material's weight, shape, temperature, and height in real time during the foaming process. Comprehensive data is recorded throughout the foaming process, allowing experimenters to understand the changes in the foam material's morphology during the foaming process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings of the embodiments of the present invention. The drawings are only used to illustrate some embodiments of the present invention, and are not intended to limit all embodiments of the present invention to these drawings.

[0025] Figure 1 This is a schematic structural diagram of a polyurethane foaming experimental device according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic structural diagram of a mixing barrel and a base according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the installation of the stirring rod according to an embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the positions of the mixing barrel and the base before mixing according to an embodiment of the utility model;

[0029] Figure 5 This is a structural diagram of a foaming box according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the state of the foaming box when cleaning the embodiment of the utility model;

[0031] Figure 7 Schematic diagram of a monitoring system according to an embodiment of the present invention.

[0032] The meanings of the numbers in the figure are:

[0033] 1. Foaming box, 101. Side panel, 102. Bottom plate, 2. Top bracket, 3. Base, 4. Mixing barrel, 5. Stirring rod, 6. Partition, 7. Groove, 8. Through hole, 9. Handle, 10. Stirring blade, 11. Cylinder, 12. Bracket hole, 13. Heating belt, 14. Fixed bracket, 15. Rotating motor, 16. Adjustment hole, 17. Connecting bracket, 18. Laser rangefinder, 19. Thermal imager, 20. Control computer. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings of specific embodiments of the present invention to clearly and completely describe the exemplary embodiments of the present invention. Unless otherwise defined, technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field.

[0035] like Figure 1 and Figure 2 As shown, this embodiment discloses a polyurethane foaming experimental device, comprising a foaming box 1, a base 3, a mixing barrel 4, a stirring rod 5, and a monitoring system. The foaming box 1 is an open structure with a T-shaped top bracket 2 welded to the open part. The foaming box 1 is mainly used for foaming polyurethane foam. The base 3 is fixedly mounted on the top bracket 2 of the foaming box 1 and is mainly used to hold and heat the foam. The mixing barrel 4 is arranged in a liftable manner in the base 3 and is mainly used to add different foams. The stirring rod 5 is nested in the mixing barrel 4. When the mixing barrel 4 is raised, the stirring rod 5 stirs the foam in the base 3. The monitoring system is used to measure various data during the polyurethane foaming process in real time, such as the weight, shape, temperature, and height of the foam.

[0036] The interior of the mixing barrel 4 is evenly divided into multiple chambers by partitions 6, which are used to separate different foam materials before stirring. In this embodiment, the chambers are divided into four chambers, allowing no more than four foam materials to be added and mixed simultaneously, ensuring that the foam materials do not interfere with each other before mixing. Preferably, each chamber of the mixing barrel 4 is engraved with a scale for controlling the amount of foam material used and the ratio of different foam materials.

[0037] An embedding groove 7 is formed at the lower middle portion of each partition 6 , and a through hole 8 is formed at the joint of all the partitions 6 . The embedding groove 7 of each partition 6 is communicated with the through hole 8 .

[0038] like Figure 4 As shown, the outer diameter of the mixing barrel 4 is smaller than the inner diameter of the base 3 so that when adding materials, the mixing barrel 4 is embedded in the base 3 and sits on the bottom plate of the base 3.

[0039] The top of the stirring rod 5 is provided with a handle 9, which can be used to stir the foam material by holding the handle 9, or it can be connected to a power mechanism to automatically stir the foam material. Figure 3 As shown, the stirring rod 5 passes through the through hole 8 in the center of the mixing barrel 4. The lower portion of the stirring rod 5 is provided with stirring blades 10. Before stirring, the stirring blades 10 are received in the embedded grooves 7 of each partition 6. It can be understood that the number of stirring blades 10 is the same as the number of partitions 6. A cylindrical plug 11 is provided at the bottom end of the stirring rod 5. A base hole is provided in the center of the base 3. Before filling, the cylindrical plug 11 is always filled in the base hole to prevent insufficiently stirred foam from leaking downward. After stirring is completed, the stirring rod 5 is lifted and the foam falls out of the base hole.

[0040] like Figure 5As shown, a bracket circular hole 12 is opened on the top bracket 2 of the foaming box 1. The bracket circular hole 12 is concentric with the base circular hole, and the diameter of the bracket circular hole 12 is larger than that of the base circular hole, so as not to affect the smooth injection of material into the foaming box 1.

[0041] The outer wall of the base 3 is wrapped with a heating belt 13, which is used to heat the base 3, thereby heating the foam material to the set temperature and eliminating the influence of temperature on the reaction results. Preferably, a temperature sensor can be provided on the inner wall of the base 3 to monitor in real time whether the foam material temperature has reached the set temperature.

[0042] An L-shaped fixed bracket 14 is installed at the top of one side panel of the foaming box 1. This bracket 14 is used to secure a rotary motor 15. The motor 15 is suspended from the horizontal end of the bracket 14. The output end of the motor 15 is connected to the handle 9 of the stirring rod 5, electrically rotating the stirring rod 5 to increase the stirring rate. Furthermore, a telescopic rod connects the fixed bracket 14 and the rotary motor 15. This allows the rod 5 to be extended to allow for movement when the stirring rod 5 needs to be raised.

[0043] The fixing bracket 14 is also used to adjust the height of the mixing drum 4. Multiple adjustment holes 16 are defined in the vertical portion of the fixing bracket 14. A connecting bracket 17 is welded to the outer wall of the mixing drum 4 near the fixing bracket 14, and the connecting bracket 17 is inserted into any of the adjustment holes 16. Preferably, the connecting bracket 17 is provided with a threaded section. When the mixing drum 4 is raised, the threaded section of the connecting bracket 17 slides along the vertical portion of the fixing bracket 14, then inserts into the adjustment hole 16 at the corresponding height, and is finally secured with a double nut. In this embodiment, the fixing bracket 14 is constructed of channel steel.

[0044] like Figure 7 As shown, the monitoring system includes a laser rangefinder 18, a thermal imager 19, a weighing sensor, and a control computer 20. The laser rangefinder 18 and thermal imager 19 are mounted on the top bracket 2 of the foaming box 1, and the weighing sensor is arranged on the bottom plate 102 of the foaming box 1. The laser rangefinder 18, thermal imager 19, and weighing sensor transmit the measured data to the control computer 20. The laser rangefinder 18 is used to measure the height of the foam material, the thermal imager 19 is used to measure the image shape and the temperature of various parts, and the weighing sensor is used to measure the weight change from the time the mixed foam material is added to the foaming box 1, thereby determining the amount of foam material loss during the foaming process.

[0045] Here’s how it works:

[0046] Add the different foam materials proportionally to each chamber of the mixing barrel 4. Once the materials are added, lift the mixing barrel 4 and secure it in the designated position. The stirring blade 10 is now fully exposed from the recess 7 of the partition 6. The rotary motor 15 and heating belt 13 are activated. The stirring blade 10 rotates and stirs the foam materials, mixing them evenly. The heating belt 13 heats the foam materials to the set temperature and then stops heating. After mixing is complete, lift the stirring rod 5, and the mixed foam materials fall through the circular hole in the base into the foaming box 1 below, where foaming begins. During the foaming process, a laser rangefinder 18, a thermal imager 19, and a weighing sensor record the weight, shape, temperature, and height of the foam materials.

[0047] like Figure 6 As shown, after the experiment is completed, the side panel 101 of the foaming box is opened, the bottom panel 102 of the foaming box is pulled out, and the foam material on the bottom panel 102 is cleaned. After cleaning, the bottom panel 102 is put back and the side panel 101 is closed.

[0048] It should be noted that when one element is expressed as “connected”, “coupled” or “connected” to another element, it may mean that they are directly connected, coupled or connected, but it should be understood that there may be intermediate elements between the two; that is, the positional relationship of direct connection and indirect connection is covered.

[0049] It should be noted that the use of "a" or "an" and similar words does not necessarily indicate a limitation of quantity. "Include" or "comprising" and similar words mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects.

[0050] It should be noted that terms such as "up", "down", "left" and "right" that indicate orientation or positional relationships are only used to indicate relative positional relationships. This is for the convenience of describing the present invention, and does not mean that the device or element must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0051] While preferred embodiments for implementing the present invention have been described in detail above, it should be understood that these embodiments are provided for illustrative purposes only and are not intended to limit the scope, applicability, or configuration of the present invention in any way. The scope of protection of the present invention is defined by the appended claims and their equivalents. Persons skilled in the art may make numerous modifications to the aforementioned embodiments based on the teachings of this invention, and such modifications are intended to fall within the scope of protection of the present invention.

Claims

1. A polyurethane foaming experimental device, characterized in that, include: The foaming box is an open structure with a top support provided at the open portion for foaming polyurethane foam; A base, which is fixedly arranged on the top bracket of the foaming box and is used for containing and heating the foaming material; A mixing barrel, which is movably arranged in the base and is used for adding different foaming materials; A stirring rod is nested in the mixing barrel, and when the mixing barrel is raised, the stirring rod stirs the foam material in the base; And a monitoring system for real-time measurement of various data during the polyurethane foaming process.

2. The polyurethane foaming experimental device according to claim 1, characterized in that: The interior of the mixing barrel is evenly divided into multiple chambers by partitions. A embedding groove is opened in the lower part of each partition. A through hole is formed at the connection of all partitions, and the embedding groove of each partition is connected to the through hole.

3. The polyurethane foaming experimental device according to claim 2, characterized in that: The outer diameter of the mixing barrel is smaller than the inner diameter of the base; and each chamber of the mixing barrel is engraved with a scale.

4. The polyurethane foaming experimental device according to claim 2, characterized in that: The top of the stirring rod is provided with a handle, and the stirring rod passes through the through hole in the center of the mixing barrel. The lower part of the stirring rod is provided with stirring blades, and the stirring blades are received in the embedded grooves of each partition before stirring.

5. The polyurethane foaming experimental device according to claim 4, characterized in that: A cylindrical plug is provided at the bottom end of the stirring rod, and a circular hole is provided at the center of the base. The cylindrical plug is filled in the circular hole before injection.

6. The polyurethane foaming experimental device according to claim 5, characterized in that: The top bracket is provided with a bracket circular hole, the bracket circular hole is concentric with the base circular hole, and the diameter of the bracket circular hole is larger than that of the base circular hole.

7. The polyurethane foaming experimental device according to claim 1, characterized in that: The outer wall of the base is wrapped with a heating belt.

8. The polyurethane foaming experimental device according to claim 4, characterized in that: An L-shaped fixing bracket is provided on the top of one side plate of the foaming box, a rotating motor is hung on the end of the horizontal portion of the fixing bracket, and the output end of the rotating motor is connected and fixed to the handle of the stirring rod.

9. The polyurethane foaming experimental device according to claim 8, characterized in that: A plurality of adjustment holes are provided on the vertical portion of the fixing bracket; a connecting bracket is fixedly provided on the outer wall of the mixing barrel close to the fixing bracket, and the connecting bracket is inserted into any of the adjustment holes.

10. The polyurethane foaming experimental device according to claim 1, characterized in that: The monitoring system includes a laser rangefinder, a thermal imager, a weighing sensor and a control computer. The laser rangefinder and thermal imager are installed on the top bracket of the foaming box, and the weighing sensor is arranged on the bottom plate of the foaming box. The laser rangefinder, thermal imager and weighing sensor transmit the measured data to the control computer.

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