Melt flow rate instrument

Abstract

The utility model relates to the technical field of melt flow rate detection, in particular to a melt flow rate meter which comprises a base, a supporting arm fixedly connected to one side of the base and a heating material box fixedly connected to the upper portion of the supporting arm. The base or the supporting arm is provided with a driving assembly for driving the material collecting disc to slide. After the extruded sample strips are cut off and fall on the material collecting disc, the material collecting disc is driven by the driving assembly to horizontally slide for a distance, so that blanking of the next extruded sample strip is facilitated and repeated in sequence, the cut sample strips can be prevented from being accumulated in the material collecting disc, the sample strips do not need to be manually moved away, and hands of an operator are prevented from being scalded due to contact with the high-temperature sample strips; potential safety hazards are reduced.

Description

Technical Field

[0001] This application relates to the field of melt flow rate detection technology, and in particular to a melt flow rate meter. Background Technology

[0002] Melt flow rate is an important indicator used in plastics processing to measure the fluidity of plastic melts. A melt flow rate meter is an instrument used to determine the melt mass flow rate (MFR) and melt volumetric flow rate (MVR) of thermoplastic resins. It is suitable not only for engineering plastics with high melting temperatures such as polycarbonate, nylon, fluoroplastics, and polysulfone, but also for testing plastics with lower melting temperatures such as polyethylene, polystyrene, polypropylene, ABS resin, and polyoxymethylene resin.

[0003] During the plastic melt rate testing process, in order to prevent the cut sample strips from accumulating in the collection tray, it is usually necessary to manually remove the cut sample strips in a timely manner. Therefore, the operator's hands are likely to come into contact with the next extruded sample strip, which may cause burns and poses a safety hazard. Therefore, further improvements are needed. Utility Model Content

[0004] To reduce safety hazards, this application provides a melt flow rate meter.

[0005] The melt flow rate meter provided in this application adopts the following technical solution:

[0006] A melt flow rate meter includes a base, a support arm fixedly connected to one side of the base, and a heating material box fixedly connected to the upper part of the support arm. A material collection tray is slidably connected to the upper surface of the base along a horizontal direction. The base or the support arm is provided with a driving component for driving the material collection tray to slide.

[0007] By adopting the above technical solution, after the extruded sample is cut and falls onto the collection tray, the collection tray is driven to slide horizontally a distance by the drive component, which facilitates the falling of the next extruded sample. This process is repeated to prevent the cut sample from accumulating in the collection tray. There is no need to manually remove the sample, which avoids burns to the operator's hands from contact with the high-temperature sample and reduces safety hazards.

[0008] Preferably, the drive assembly includes a horizontal telescopic cylinder, the cylinder body of which is fixedly connected to the base or support arm, and the piston rod of which is connected to the collection tray.

[0009] By adopting the above technical solution, the horizontal telescopic cylinder is used to drive the material collection disc to slide.

[0010] Preferably, the drive assembly further includes a bracket fixedly connected to the piston rod of the horizontal telescopic cylinder and a snap-fit ​​seat slidably connected to the bracket along the vertical direction. The collection tray includes a base plate and edge plates fixedly connected to the perimeter of the base plate. The lower end face of the snap-fit ​​seat has a slot for inserting one of the edge plates.

[0011] By adopting the above technical solution, the plate is inserted into the slot of the snap-fit ​​seat to realize the connection between the snap-fit ​​seat and the collection tray. The horizontal telescopic cylinder drives the bracket to slide, thereby driving the collection tray to slide horizontally through the snap-fit ​​seat. After the collection tray has finished collecting the material, the snap-fit ​​seat slides upward, so that the snap-fit ​​seat and the plate separate, making it easy for the staff to remove the collection tray.

[0012] Preferably, the bracket includes a vertical plate and a horizontal plate. The vertical plate is fixedly connected to the piston rod of the horizontal telescopic cylinder, the horizontal plate is fixedly connected to the upper end face of the vertical plate, and the snap-fit ​​seat is located below the horizontal plate. The snap-fit ​​seat is fixedly connected to a guide rod that slides through the horizontal plate.

[0013] By adopting the above technical solution, the sliding assembly of the snap-fit ​​seat and the bracket is achieved through the guide rod.

[0014] Preferably, the upper part of the guide rod is threaded with an anti-loosening nut located above the cross plate.

[0015] By adopting the above technical solution, the anti-loosening nut on the threaded connection of the guide rod located above the horizontal plate can prevent the clamping seat from detaching from the bracket, thereby improving the stability and safety of the equipment.

[0016] Preferably, the snap-fit ​​seat is provided with a spring sleeved on the guide rod, the upper end of the spring abutting or fixed to the lower end face of the horizontal plate, and the lower end of the spring abutting or fixed to the upper end face of the snap-fit ​​seat.

[0017] By adopting the above technical solution, the snap-fit ​​seat is equipped with a spring sleeved on the guide rod, and the two ends of the spring abut against or are fixed to the horizontal plate and the snap-fit ​​seat respectively. The spring helps to maintain the stable snap-fit ​​state between the snap-fit ​​seat and the material collection tray along the plate, ensuring that the drive component stably drives the material collection tray to move horizontally.

[0018] Preferably, a guide rail is fixedly connected to the upper end face of the base, and a slider is fixedly connected to the lower end face of the collection tray. A slot for the guide rail to be engaged is provided on the lower end face of the slider.

[0019] By adopting the above technical solution, the guide rail and slider work together to enable the collection tray to slide more stably on the base, reducing swaying and deviation during sliding.

[0020] Preferably, a protective cover is provided between the base and the heating material box. The protective cover includes a first protective side plate, a second protective side plate, and a front protective plate. The first protective side plate is fixedly connected to the base, and the upper surface of the first protective side plate abuts against the lower surface of the heating material box. The first protective side plate abuts against the support arm. One side of the front protective plate is hinged to the side wall of the first protective side plate away from the support arm. The second protective side plate is fixedly connected to the other side of the front protective plate. The upper and lower surfaces of the second protective side plate abut against the heating material box and the base, respectively. The side of the second protective side plate away from the front protective plate is fixed to the support arm by a buckle.

[0021] By adopting the above technical solution, a protective cover is added to achieve physical isolation, further improving operational safety.

[0022] In summary, this utility model has the following beneficial effects:

[0023] 1. After the extruded sample is cut and falls onto the collection tray, the collection tray is driven to slide horizontally a distance by the drive component to facilitate the falling of the next extruded sample. This process is repeated to prevent the cut sample from accumulating in the collection tray. There is no need to manually remove the sample, which avoids burns to the operator's hands from contact with the high-temperature sample and reduces safety hazards.

[0024] 2. The plate is inserted into the slot of the snap-fit ​​seat to connect the snap-fit ​​seat and the collection tray. The horizontal telescopic cylinder drives the bracket to slide, thereby driving the collection tray to slide horizontally through the snap-fit ​​seat. After the collection tray has finished collecting the material, the snap-fit ​​seat slides upward to separate the snap-fit ​​seat from the plate, making it easy for the staff to remove the collection tray. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a melt flow rate meter in Example 1;

[0026] Figure 2 This is a schematic diagram of the drive component in Embodiment 1;

[0027] Figure 3 This is a schematic diagram of the card holder and bracket in Embodiment 1;

[0028] Figure 4 This is a schematic diagram of the overall structure of a melt flow rate meter in Example 2;

[0029] Figure 5 This is a schematic diagram of the front protective panel in the open state in Embodiment 2.

[0030] In the diagram, 1 is the base; 11 is the guide rail; 2 is the support arm; 3 is the heating hopper; 4 is the collection tray; 41 is the bottom plate; 42 is the side plate; 43 is the slider; 5 is the drive assembly; 51 is the horizontal telescopic cylinder; 52 is the bracket; 521 is the vertical plate; 522 is the horizontal plate; 53 is the snap-fit ​​seat; 531 is the slot; 532 is the guide rod; 533 is the anti-loosening nut; 534 is the spring; 54 is the connecting rod; 55 is the connecting plate; 6 is the protective cover; 61 is the first protective side plate; 62 is the front protective plate; 63 is the second protective side plate; 64 is the clearance groove; 65 is the handle; and 66 is the fan. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0032] Example 1:

[0033] This application discloses a melt flow rate meter, referring to... Figure 1 , Figure 2 It includes a base 1, a support arm 2 fixedly connected to one side of the base 1, and a heating material box 3 fixedly connected to the upper part of the support arm 2. The heating material box 3 and the support arm 2 are existing technologies and will not be described in detail here.

[0034] A guide rail 11 is fixedly connected to the upper end face of the base 1. In this embodiment, two guide rails 11 are provided and are spaced apart along the width direction of the base 1, and the length direction of the guide rails 11 is parallel to the length direction of the base 1. A collection tray 4 is provided on the upper end face of the base 1, which slides on the guide rail 11. The collection tray 4 includes a base plate 41 and edge plates 42 fixedly connected to the perimeter of the base plate 41. The edge plates 42 are arranged vertically. A slider 43 is fixedly connected to the lower end face of the base plate 41, and a slot for the guide rail 11 to be engaged is opened on the lower end face of the slider 43.

[0035] The base 1 or support arm 2 is equipped with a drive assembly 5 for sliding the material collection disc 4. In this embodiment, the drive assembly 5 includes a horizontal telescopic cylinder 51, a bracket 52, and a locking seat 53. Specifically, the horizontal telescopic cylinder 51 can be a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder. The cylinder body of the horizontal telescopic cylinder 51 is fixedly connected to the base 1 or support arm 2. In this embodiment, the cylinder body of the horizontal telescopic cylinder 51 is fixedly connected to the back of the support arm 2. The bracket 52 includes a vertical plate 521 and a horizontal plate 522 fixedly connected to the upper end face of the vertical plate 521. A connecting rod 54 is fixedly connected to the outer wall of the vertical plate 521, and a connecting plate 55 is fixedly connected to the outer wall of the connecting rod 54. The connecting plate 55 is fixedly connected to the piston rod of the horizontal telescopic cylinder 51.

[0036] Reference Figure 2 , Figure 3The snap-fit ​​seat 53 is located below the horizontal plate 522. A guide rod 532, which slides through the horizontal plate 522, is fixedly connected to the snap-fit ​​seat 53. An anti-loosening nut 533, located above the horizontal plate 522, is threaded onto the upper part of the guide rod 532. The lower end of the anti-loosening nut 533 abuts against the upper end of the horizontal plate 522. A spring 534 is fitted onto the guide rod 532. The upper end of the spring 534 abuts against or is fixed to the lower end of the horizontal plate 522, and the lower end of the spring 534 abuts against or is fixed to the upper end of the snap-fit ​​seat 53. A slot 531 is provided on the lower end of the snap-fit ​​seat 53 for one of the plates 42 to be inserted.

[0037] The implementation principle of a melt flow rate meter according to an embodiment of this application is as follows: Under normal conditions, the guide plate 42 is inserted into the slot 531 of the clamping seat 53, and the piston rod of the horizontal telescopic cylinder 51 is in an extended state, so that one side of the collecting tray 4 is directly below the die opening of the heating material box 3. When the extruded sample is cut off by the cutter on the support arm 2 and falls onto the collecting tray 4, the piston rod of the horizontal telescopic cylinder 51 retracts and drives the collecting tray 4 to slide a distance through the bracket 52 and the clamping seat 53, providing clearance for the next extruded sample to fall. After the sample falls, the collecting tray 4 slides another distance, which can prevent the cut sample from accumulating in the collecting tray 4, eliminating the need for manual removal of the sample, avoiding burns to the operator's hands from contact with the high-temperature sample, and reducing safety hazards. After the collecting tray 4 has finished collecting, the clamping seat 53 slides upward, separating the clamping seat 53 from the guide plate 42, and the collecting tray 4 can be removed.

[0038] Example 2:

[0039] The difference from Example 1 is that, referring to Figure 4 , Figure 5 A protective cover 6 is provided between the base 1 and the heating material box 3. The protective cover 6 is a transparent cover, specifically, an acrylic cover. The protective cover 6 includes a first protective side plate 61, a second protective side plate 63, and a front protective plate 62. The first protective side plate 61 is fixedly connected to the base 1, the upper end surface of the first protective side plate 61 abuts against the lower end surface of the heating material box 3, and the first protective side plate 61 abuts against the support arm 2.

[0040] One side of the front protective plate 62 is hinged to the side wall of the first protective side plate 61 away from the support arm 2. The second protective side plate 63 is fixedly connected to the other side of the front protective plate 62. The upper and lower end faces of the second protective side plate 63 abut against the heating material box 3 and the base 1, respectively. The side of the second protective side plate 63 away from the front protective plate 62 is fixed to the outer wall of the support arm 2 by a buckle. A handle 65 is fixedly connected to the outer wall of the second protective side plate 63. The lower parts of the first protective side plate 61 and the second protective side plate 63 are respectively provided with clearance grooves 64 for the bracket 52 and the material collection tray 4 to slide through. In other embodiments, the first protective side plate 61 is provided with a fan 66 for blowing air to cool the strip extruded from the die.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A melt flow rate meter, characterized in that: It includes a base (1), a support arm (2) fixedly connected to one side of the base (1), and a heating material box (3) fixedly connected to the upper part of the support arm (2). The upper end face of the base (1) is slidably connected to a material collection plate (4). The base (1) or the support arm (2) is provided with a drive assembly (5) for driving the material collection plate (4) to slide.

2. The melt flow rate meter according to claim 1, characterized in that: The drive assembly (5) includes a horizontal telescopic cylinder (51), the cylinder body of which is fixedly connected to the base (1) or the support arm (2), and the piston rod of which is connected to the collection plate (4).

3. A melt flow rate meter according to claim 2, characterized in that: The drive assembly (5) also includes a bracket (52) fixedly connected to the piston rod of the horizontal telescopic cylinder (51) and a snap-fit ​​seat (53) slidably connected to the bracket (52) in the vertical direction. The collection tray (4) includes a base plate (41) and edge plates (42) fixedly connected to the periphery of the base plate (41). The lower end face of the snap-fit ​​seat (53) is provided with a slot (531) for inserting one of the edge plates (42).

4. A melt flow rate meter according to claim 3, characterized in that: The bracket (52) includes a vertical plate (521) and a horizontal plate (522). The vertical plate (521) is fixedly connected to the piston rod of the horizontal telescopic cylinder (51). The horizontal plate (522) is fixedly connected to the upper end face of the vertical plate (521). The snap-fit ​​seat (53) is located below the horizontal plate (522). The snap-fit ​​seat (53) is fixedly connected to a guide rod (532) that slides through the horizontal plate (522).

5. A melt flow rate meter according to claim 4, characterized in that: The upper part of the guide rod (532) is threaded with an anti-loosening nut (533) located above the cross plate (522).

6. A melt flow rate meter according to claim 4, characterized in that: The snap-fit ​​seat (53) is provided with a spring (534) sleeved on the guide rod (532). The upper end of the spring (534) abuts against or is fixed to the lower end face of the horizontal plate (522), and the lower end of the spring (534) abuts against or is fixed to the upper end face of the snap-fit ​​seat (53).

7. A melt flow rate meter according to claim 1, characterized in that: The upper end face of the base (1) is fixedly connected to the guide rail (11), and the lower end face of the collection tray (4) is fixedly connected to the slider (43). The lower end face of the slider (43) is provided with a slot for the guide rail (11) to be engaged.

8. A melt flow rate meter according to claim 1, characterized in that: A protective cover (6) is provided between the base (1) and the heating material box (3). The protective cover (6) includes a first protective side plate (61), a second protective side plate (63), and a front protective plate (62). The first protective side plate (61) is fixedly connected to the base (1). The upper end face of the first protective side plate (61) abuts against the lower end face of the heating material box (3). The first protective side plate (61) abuts against the support arm (2). One side of the front protective plate (62) is hinged to the side wall of the first protective side plate (61) away from the support arm (2). The second protective side plate (63) is fixedly connected to the other side of the front protective plate (62). The upper and lower end faces of the second protective side plate (63) abut against the heating material box (3) and the base (1) respectively. The side of the second protective side plate (63) away from the front protective plate (62) is fixed to the support arm (2) by a buckle.

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