Flange connecting assembly and plastic color matching machine

Abstract

The utility model belongs to the technical field of plastic color matching machines, and particularly relates to a flange connecting assembly and a plastic color matching machine, which comprise an upper flange plate and a lower flange plate which are vertically distributed, the upper flange plate and the lower flange plate are vertically erected and fixed through a connecting plate, and the middle part of the upper flange plate is provided with an upper material passing hole; a lower material passing hole corresponding to the upper material passing hole in position is formed in the middle of the lower flange plate, a ventilation cylinder communicating the upper material passing hole with the lower material passing hole is arranged between the upper flange plate and the lower flange plate, and an air hole capable of being communicated with the outside is formed in the side wall of the ventilation cylinder. The ventilation cylinder is simple in structure, reasonable in design and low in cost, and is mainly used for being connected between a negative pressure conveying device and a port of the plastic color matching machine, when materials enter the lower material passing hole from the upper material passing hole, redundant gas can be exhausted outwards from the gas hole of the ventilation cylinder, and therefore the gas pressure of an inner cavity of the plastic color matching machine and the gas pressure of the outside are effectively balanced.

Description

Technical fields:

[0001] This utility model belongs to the technical field of plastic color matching machine, specifically referring to a flange connection assembly and a plastic color matching machine. Background technology:

[0002] In the plastic color matching production process, it is crucial to accurately and efficiently add materials such as color masterbatch and color powder. Currently, plastic color matching machines widely use cyclone feeders (or negative pressure suction feeders) to achieve automatic conveying of color masterbatch. Its working principle is to use the negative pressure generated by the fan to suck the color masterbatch from the storage container into the cyclone feeder fixed at the masterbatch inlet of the plastic color matching machine through the pipeline. Then, the opening and closing of the valve allows the color masterbatch in the cyclone feeder to enter the plastic color matching machine.

[0003] However, this negative pressure-based feeding method has a significant technical problem in the application of plastic color matching machines: when the masterbatch enters the relatively enclosed space inside the plastic color matching machine through the cyclone feeder, a large amount of masterbatch and air rush in rapidly, instantly creating a positive pressure environment in the enclosed space. This positive pressure environment will promote the precise delivery of other auxiliary materials, such as the precise delivery of color powder conveying devices, diffusion oil conveying devices, and other additive conveying devices. Summary of the Invention:

[0004] The purpose of this utility model is to provide a flange connection assembly and a plastic color matching machine, which are used to connect between the negative pressure conveying device and the port of the plastic color matching machine, and to effectively balance the air pressure between the inner cavity of the plastic color matching machine and the outside environment by means of the air holes on the ventilation cylinder.

[0005] This utility model is implemented as follows:

[0006] A flange connection assembly includes an upper flange plate and a lower flange plate distributed vertically. The upper flange plate and the lower flange plate are fixed together by a connecting plate. An upper material passage hole is opened in the middle of the upper flange plate, and a lower material passage hole corresponding to the position of the upper material passage hole is opened in the middle of the lower flange plate. A venting cylinder is provided between the upper flange plate and the lower flange plate to connect the upper material passage hole and the lower material passage hole. An air hole is opened on the side wall of the venting cylinder to communicate with the outside.

[0007] In the aforementioned flange connection assembly, the diameter of the upper feed hole is smaller than that of the lower feed hole. The wall of the upper feed hole extends towards the lower flange plate to form an upper feed extension cylinder. The wall of the lower filter hole extends towards the upper flange to form a lower feed extension cylinder. The upper port of the lower feed extension cylinder is sleeved around the lower outer periphery of the upper feed extension cylinder.

[0008] In the aforementioned flange connection assembly, the upper end of the vent cylinder body abuts against and is fixed to the lower end face of the upper flange plate, and the lower end of the vent cylinder body is fitted onto the inner wall surface of the lower material extension cylinder.

[0009] In the flange connection assembly described above, there is an internal venting gap between the lower end of the upper feed extension cylinder and the lower port of the lower feed hole, and an external venting gap between the upper port of the lower feed extension cylinder and the lower end face of the upper flange plate, with the vent corresponding to the external venting gap.

[0010] In one of the flange connection assemblies described above, the vent cylinder body is a breathable filter structure with vent holes evenly distributed on the side wall.

[0011] In the flange connection assembly described above, the axis of the upper feed hole and the axis of the lower feed hole are on the same straight line.

[0012] In the aforementioned flange connection assembly, several connecting plates are circumferentially distributed and arranged radially along the vent cylinder.

[0013] Another object of this utility model is to provide a plastic color matching machine, which includes a flange connection assembly as described in any of the above.

[0014] The outstanding advantages of this utility model compared to the prior art are:

[0015] This utility model has a simple structure, reasonable design and low cost. It is mainly used to connect the negative pressure conveying device and the port of the plastic color matching machine. During the process of material entering the lower material passage from the upper material passage, excess gas can be discharged outward from the air hole of the ventilation cylinder to effectively balance the air pressure inside the plastic color matching machine and the outside. Attached image description:

[0016] Figure 1 This utility model is an overall three-dimensional Figure 1 ;

[0017] Figure 2 This utility model is an overall three-dimensional Figure 2 ;

[0018] Figure 3 This is an overall sectional view of the present invention.

[0019] In the diagram: 1. Upper flange plate; 2. Lower flange plate; 3. Connecting plate; 4. Upper material passage hole; 5. Lower material passage hole; 6. Vent cylinder; 7. Air hole; 8. Upper material passage extension cylinder; 9. Lower material passage extension cylinder. Detailed implementation method:

[0020] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —3:

[0021] A flange connection assembly includes an upper flange plate 1 and a lower flange plate 2 distributed vertically. The upper flange plate 1 and the lower flange plate 2 are fixed together by a connecting plate 3. An upper material passage hole 4 is provided in the middle of the upper flange plate 1, and a lower material passage hole 5 corresponding to the position of the upper material passage hole 4 is provided in the middle of the lower flange plate 2. A venting cylinder 6 is provided between the upper flange plate 1 and the lower flange plate 2 to connect the upper material passage hole 4 and the lower material passage hole 5. An air hole 7 is provided on the side wall of the venting cylinder 6 to communicate with the outside.

[0022] This utility model has a simple structure, reasonable design and low cost. It is mainly used to connect the negative pressure conveying device and the port of the plastic color matching machine. When the material enters the lower material passage 5 from the upper material passage 4, the excess gas can be discharged outward from the air hole 7 of the ventilation cylinder 6 to effectively balance the air pressure inside the plastic color matching machine and the outside.

[0023] In this embodiment, the diameter and position of the upper feed hole 4 and the lower feed hole 5 can be kept consistent vertically. The venting cylinder 6 serves as the main conveying channel connecting the upper feed hole 4 and the lower feed hole 5. In this embodiment, considering that the masterbatch may get stuck in the air hole 7 of the venting cylinder 6 during the process from the upper feed hole 4 to the lower feed hole 5, making it difficult for excess gas to be discharged, the axis of the upper feed hole 4 and the axis of the lower feed hole 5 are on the same straight line, and the diameter of the upper feed hole 4 is smaller than the diameter of the lower feed hole 5. The hole wall of the upper feed hole 4 extends towards the lower flange plate 2 to form an upper feed extension cylinder 8, and the hole wall of the lower filter hole extends towards the upper flange to form a lower feed extension cylinder 9. The upper port of the lower feed extension cylinder 9 is sleeved around the lower outer periphery of the upper feed extension cylinder 8. The upper feed extension cylinder 8 and the lower feed extension cylinder 9 form the main conveying channel for the masterbatch from the upper feed hole 4 to the lower feed hole 5. The upper feed extension cylinder 8 and the lower feed extension cylinder 9 effectively prevent the masterbatch from getting stuck in the air hole 7 of the ventilation cylinder 6.

[0024] Meanwhile, the venting cylinder 6 can be directly set on the outer periphery of the upper material passage hole 4 and the lower material passage hole 5, that is, set on the outer periphery of the lower material passage extension cylinder 9. In this embodiment, the upper end of the venting cylinder 6 abuts against and is fixed on the lower end face of the upper flange plate 1, and the lower end of the venting cylinder 6 is fitted on the inner wall surface of the lower material passage extension cylinder 9.

[0025] Furthermore, to avoid physical interference between the lower end of the feed extension cylinder 9 and the plastic color matching machine connected to the lower flange plate 2, an internal ventilation gap exists between the lower end of the upper feed extension cylinder 8 and the lower port of the feed hole 5. At the same time, in order to form a labyrinth structure so as to effectively prevent color masterbatch from getting stuck in the air hole 7 while allowing gas to be discharged outwards, an external ventilation gap exists between the upper port of the feed extension cylinder 9 and the lower end face of the upper flange plate 1, and the air hole 7 corresponds to the position of the external ventilation gap.

[0026] Furthermore, the ventilation cylinder 6 is a breathable filter structure with air holes 7 evenly distributed on the side wall.

[0027] In addition, in order to improve the stability and firmness of the connection between the upper flange plate 1 and the lower flange plate 2, the connecting plate 3 is circumferentially distributed in several parts and is arranged radially along the venting cylinder 6.

[0028] Another objective of this utility model is to provide a plastic color matching machine, which includes a flange connection assembly as described in any of the above claims, wherein the masterbatch feeding end of the plastic color matching machine is fixedly connected to the lower flange plate 2, and the cyclone feeder for conveying the masterbatch is fixedly connected to the upper flange plate 1.

[0029] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A flange connection assembly, characterized in that: It includes an upper flange plate (1) and a lower flange plate (2) distributed vertically. The upper flange plate (1) and the lower flange plate (2) are fixed together by a connecting plate (3). The upper flange plate (1) has an upper material passage hole (4) in the middle, and the lower flange plate (2) has a lower material passage hole (5) in the middle corresponding to the position of the upper material passage hole (4). A venting cylinder (6) connecting the upper material passage hole (4) and the lower material passage hole (5) is provided between the upper flange plate (1) and the lower flange plate (2). The side wall of the venting cylinder (6) has an air hole (7) that can communicate with the outside.

2. A flange connection assembly according to claim 1, characterized in that: The diameter of the upper feed hole (4) is smaller than that of the lower feed hole (5). The wall of the upper feed hole (4) extends toward the lower flange plate (2) to form an upper feed extension cylinder (8). The wall of the lower filter hole extends toward the upper flange to form a lower feed extension cylinder (9). The upper end of the lower feed extension cylinder (9) is sleeved around the lower end of the upper feed extension cylinder (8).

3. A flange connection assembly according to claim 2, characterized in that: The upper end of the venting cylinder (6) abuts against and is fixed to the lower end face of the upper flange plate (1), and the lower end of the venting cylinder (6) is fitted onto the inner wall of the lower material extension cylinder (9).

4. A flange connection assembly according to claim 2 or 3, characterized in that: There is an internal ventilation gap between the lower end of the upper feed extension cylinder (8) and the lower port of the lower feed hole (5), and there is an external ventilation gap between the upper port of the lower feed extension cylinder (9) and the lower end face of the upper flange plate (1). The position of the air hole (7) corresponds to the external ventilation gap.

5. A flange connection assembly according to claim 4, characterized in that: The ventilation cylinder (6) is a breathable filter structure with air holes (7) evenly distributed on the side wall.

6. A flange connection assembly according to claim 1 or 2, characterized in that: The axis of the upper feed hole (4) and the axis of the lower feed hole (5) are on the same straight line.

7. A flange connection assembly according to claim 1, characterized in that: The connecting plates (3) are distributed circumferentially and are arranged radially along the ventilation cylinder (6).

8. A plastic color matching machine, characterized in that: It includes a flange connection assembly as described in any one of claims 1-7.

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