Spraying-free plastic particle melt flow rate meter

Abstract

The utility model provides a spray-free plastic particle melt flow rate meter, and belongs to the technical field of measuring equipment. The technical problem that an existing melt flow rate instrument is inconvenient to maintain is solved. The spraying-free plastic particle melt flow rate instrument comprises a machine base, a discharging barrel and an electric heating module, the discharging barrel is vertically arranged, the electric heating module is annular and fixed in the machine base, the discharging barrel is inserted into the electric heating module, and the discharging barrel is connected with the electric heating module. The top of the machine base is detachably connected with two shielding plates used for shielding the electric heating module, the two shielding plates are horizontally arranged, the upper end of the discharging barrel is in a funnel shape and is higher than the shielding plates, and the left and right opposite edges of the two shielding plates are each provided with a semicircular notch. The two baffle plates are spliced left and right, and the inner edges of the semicircular notches are arranged around the periphery of the discharging barrel. The utility model is more convenient to maintain.

Description

Technical Field

[0001] This utility model belongs to the field of measuring equipment technology and relates to a paint-free plastic particle melt flow rate meter. Background Technology

[0002] A melt flow rate tester uses high-temperature heating to bring the test material to a molten state under specified temperature conditions. This molten material is then extruded through a small orifice of a certain diameter under the load of specified weights. The working principle of the melt flow rate test is as follows: plastic granules are melted at high temperature, and the molten plastic flows out from the outlet. At predetermined time intervals, a rotating metal blade cuts the flowing sample, and the weight of the sample is then weighed to determine its melt flow rate performance. Paint-free plastics are environmentally friendly materials that do not require surface coating. They can directly present color and texture, reducing VOC emissions and aligning with green production trends. They are widely used in home appliances, automotive parts, and other fields. Paint-free plastic particles are prone to weld lines during processing, making their melt flowability index crucial; therefore, it is frequently necessary to test the melt flow rate of paint-free plastic particles.

[0003] Patent CN215179404U discloses a splash-proof device for a flow rate meter, comprising: a housing, a material cylinder, a heating layer, a heat insulation layer, a die, a pressure rod, a weight, a cutting blade assembly, a baffle tray frame, and a tray. The material cylinder is installed on the upper right side of the housing. The side wall of the material cylinder is wrapped with a heating layer. A heat insulation layer is installed between the heating layer and the housing. The die is located in the lower middle of the material cylinder. The pressure rod is located above the material cylinder. The weight is located above the pressure rod.

[0004] While the aforementioned equipment offers anti-splash protection, it still has some shortcomings: A funnel is required for feeding, and when the funnel is removed, some plastic particles can easily seep between the material cylinder and the housing, making cleaning and maintenance difficult. Furthermore, maintenance of the internal heating layer often requires removing the entire outer shell of the housing, which is inconvenient. Summary of the Invention

[0005] This invention addresses the aforementioned problems in existing technologies by providing a paint-free plastic particle melt flow rate meter. The technical problem this invention aims to solve is that existing melt flow rate meters are inconvenient for feeding and maintenance.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A paint-free plastic particle melt flow rate meter includes a base, a feeding cylinder, and an electric heating module. The feeding cylinder is vertically arranged, and the electric heating module is annular and fixed inside the base. The feeding cylinder is inserted into the electric heating module. The base has two detachable shielding plates for shielding the electric heating module. Both shielding plates are horizontally arranged. The upper end of the feeding cylinder is funnel-shaped and higher than the shielding plates. The left and right opposite edges of the two shielding plates each have a semi-circular notch. The two shielding plates are joined together so that the inner edges of the semi-circular notches are arranged around the outer periphery of the feeding cylinder.

[0008] By designing the upper end of the feeding cylinder to be funnel-shaped, the need for repeated funnel installation is eliminated, making feeding convenient. This also prevents plastic particles from being carried out with the funnel each time it is removed, falling between the upper edge of the feeding cylinder and the electric heating module, which would make subsequent melting difficult to maintain and clean. At the same time, the detachable baffles are designed to be joined together, with the two semi-circular notches arranged around the outer perimeter of the feeding cylinder. This tight fit of the baffles prevents plastic particles falling from the upper end of the feeding cylinder from entering below the baffles. Moreover, when internal components such as the electric heating module need maintenance, only the two baffles need to be removed from the top of the machine base for maintenance operations, without having to disassemble the entire machine base shell, making maintenance more convenient.

[0009] In the aforementioned paint-free plastic particle melt flow rate meter, the outer periphery of the feeding cylinder is screwed into the inner edge of the electric heating module. The portion of the feeding cylinder extending beyond the electric heating module arches radially outward, making its cross-section polygonal. This ensures the relative positional stability between the feeding cylinder and the electric heating module. Furthermore, the arched portion of the feeding cylinder allows for independent cleaning by using tools such as wrenches to circumferentially lock the arched portion and then rotating the feeding cylinder to separate it from the electric heating module.

[0010] In the aforementioned paint-free plastic particle melt flow rate meter, the baffle plate and the electric heating module below it are arranged vertically at a distance. This helps to prevent the baffle plate from directly contacting the electric heating module, thus avoiding safety risks caused by excessively high temperatures on the baffle plate surface during operation.

[0011] In the aforementioned melt flow rate meter, the base has horizontally continuous grooves running left and right. The edges of the two baffles are slidably connected within these grooves, and each baffle is fixed to the base by a downward-pointing screw penetrating through it. This allows for stable positioning of each baffle with only one screw. During disassembly and maintenance, only one screw needs to be removed before the baffle can be pulled out of the groove, resulting in fewer steps and more convenient maintenance.

[0012] In the aforementioned paint-free plastic particle melt flow rate meter, the edge portion of the baffle plate is supported on the radially arched portion at the upper end of the feed cylinder. The area where the two baffle plates join with the feed cylinder is located in the middle position after the two baffle plates are joined together. In this way, the radially arched portion at the upper end of the feed cylinder can provide support for the edges of the two baffle plates, thereby reducing the probability of deformation of the baffle plates and ensuring structural stability.

[0013] Compared with the prior art, the advantages of this utility model are as follows:

[0014] This paint-free plastic particle melt flow rate meter features a funnel-shaped upper end for the feed cylinder and two baffles on the top of the machine base. This eliminates the maintenance problems caused by plastic particles spilling due to disassembling the funnel. The tight fit of the baffles prevents plastic particles falling from the upper end of the feed cylinder from entering below the baffles. Furthermore, when internal components such as the electric heating module need maintenance, only the two baffles need to be removed from the top of the machine base for maintenance, without having to disassemble the entire machine base casing, making maintenance more convenient. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of this embodiment.

[0016] Figure 2 This is a top view of the structure of this embodiment.

[0017] Figure 3 yes Figure 2 A schematic diagram of the AA cross section.

[0018] Figure 4 This is a schematic diagram of the exploded structure of this embodiment.

[0019] In the diagram, 1 is the machine base; 11 is the slide.

[0020] 2. Feeding cylinder; 3. Electric heating module;

[0021] 4. Baffle; 41. Semicircular notch;

[0022] 5. Screws. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] like Figure 1-4As shown, this paint-free plastic particle melt flow rate meter includes a base 1, a feeding cylinder 2, and an electric heating module 3. The electric heating module 3 is an existing component. The feeding cylinder 2 is vertically arranged, and the electric heating module 3 is annular and fixed inside the base 1. The feeding cylinder 2 is inserted into the electric heating module 3. Two shielding plates 4 for shielding the electric heating module 3 are detachably connected to the top of the base 1. Both shielding plates 4 are horizontally arranged. The upper end of the feeding cylinder 2 is funnel-shaped and higher than the shielding plates 4. The left and right opposite edges of the two shielding plates 4 have semi-circular notches 41. The two shielding plates 4 are joined together so that the inner edges of the semi-circular notches 41 are arranged around the outer periphery of the feeding cylinder 2. The outer periphery of the feeding cylinder 2 is screwed into the inner edge of the electric heating module 3. The part of the feeding cylinder 2 that extends outward from the electric heating module 3 arches radially outward, making the cross-section of this part a regular hexagon. The shielding plates 4 and the electric heating module 3 below are arranged vertically at intervals. The base 1 has a horizontally penetrating groove 11. The edges of the two baffle plates 4 are slidably connected within the groove 11. Both baffle plates 4 are fixed to the base 1 by a screw 5 that passes downward through the baffle plate 4. The screw 5 is an existing component. The edge portion of the baffle plate 4 is supported on the radially arched portion at the upper end of the feed cylinder 2.

[0025] Working principle: The plastic granules to be tested are filled into the feeding cylinder 2 from above. Then, the electric heating module 3 heats the feeding cylinder 2, causing the plastic granules inside to melt at high temperature. A push rod is inserted into the upper end of the feeding cylinder 2, and a weight with a certain load is placed on the push rod. The lower end of the push rod continuously extrudes the molten plastic from the small holes at the lower end of the feeding cylinder 2. A cutting device is installed below each small hole, which periodically cuts the extruded material, causing it to fall into a tray below. Finally, the melt flow rate performance of the plastic is determined by weighing the material in the tray. The funnel-shaped design at the upper end of the feeding cylinder 2 reduces the need for cleaning up scattered plastic granules. When maintenance is required on the feeding cylinder 2 or the electric heating module 3, the two baffles 4 can be easily disassembled without removing the entire outer shell of the machine base 1, making maintenance more convenient.

[0026] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A paint-free plastic particle melt flow rate meter, comprising a base (1), a feeding cylinder (2), and an electric heating module (3), wherein the feeding cylinder (2) is vertically arranged, the electric heating module (3) is annular and fixed inside the base (1), and the feeding cylinder (2) is inserted into the electric heating module (3), characterized in that, The top of the base (1) is detachably connected to two shielding plates (4) for shielding the electric heating module (3). Both shielding plates (4) are arranged horizontally. The upper end of the feed cylinder (2) is funnel-shaped and higher than the shielding plates (4). The left and right opposite edges of the two shielding plates (4) have semi-circular notches (41). The two shielding plates (4) are joined together so that the inner edge of the semi-circular notches (41) is arranged around the outer periphery of the feed cylinder (2).

2. The paint-free plastic particle melt flow rate meter according to claim 1, characterized in that, The outer periphery of the feeding cylinder (2) is screwed into the inner edge of the electric heating module (3). The part of the feeding cylinder (2) extending outward from the electric heating module (3) in the upper end arches outward in the radial direction, making the cross-section of this part polygonal.

3. The paint-free plastic particle melt flow rate meter according to claim 1 or 2, characterized in that, The shielding plate (4) and the electric heating module (3) below it are arranged vertically at intervals.

4. The paint-free plastic particle melt flow rate meter according to claim 1 or 2, characterized in that, The base (1) has a horizontally penetrating groove (11) on the left and right sides. The edges of the two baffles (4) are slidably connected in the groove (11). Both baffles (4) are fixed to the base (1) by a screw (5) that passes through the baffle (4) downwards.

5. The paint-free plastic particle melt flow rate meter according to claim 2, characterized in that, The edge portion of the baffle plate (4) is supported on the radially arched portion at the upper end of the feed cylinder (2).

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