A flow rate control nozzle for extrusion

Abstract

The utility model relates to extrusion processing technical field belongs to one kind of extrusion with control flow rate head, including mould body, be equipped with the discharge runner in the mould body, the inlet end of discharge runner is connected with inlet, be equipped with the control flow board in discharge runner, the control flow board is located the inlet end, be equipped with heating assembly one and heating assembly two on the mould body, heating assembly one and heating assembly two all are located discharge runner top, are located control flow board front and back end respectively. The application passes through setting control flow board, ensures that the speed distribution is consistent along the flow cross section direction when the molten material flows in the discharge runner, effectively eliminates the flow rate difference. On this basis, with the help of first heating assembly and second heating assembly to the material implementation heat preservation, further stabilize material temperature, strengthen heat homogeneity, thereby significantly improve extrusion forming quality.

Description

Technical Field

[0001] This utility model relates to the field of extrusion processing technology and belongs to a flow rate control die for extrusion. Background Technology

[0002] The extrusion die is the "heart" and "final shaper" of the extrusion molding production line. Located at the end of the extruder, it receives the molten plastic, rubber, or other polymer materials that have been melted, compressed, and uniformly extruded by the extruder screw.

[0003] In actual extrusion processes, when molten material flows through the discharge channel, frictional resistance along the channel wall often leads to a decrease in the flow velocity of the material near the wall, creating a significant velocity difference between the material and the central fluid. This uneven flow not only causes fluctuations in the extrusion process and affects stability, but also results in lower material temperatures on both sides of the channel, creating a significant temperature difference, which adversely affects the final extrusion molding quality. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a flow rate control die for extrusion.

[0005] To achieve the above objectives, this utility model provides the following technical solution: This application provides a flow rate control die for extrusion, including a die body, a discharge channel provided in the die body, an inlet connected to the inlet end of the discharge channel, a flow control plate provided in the discharge channel, the flow control plate being located at the end of the inlet, and a heating component one and a heating component two provided on the die body, both of which are located above the discharge channel and at the front and rear ends of the flow control plate, respectively.

[0006] Preferably, the flow control plate is configured as a streamlined curved surface structure, with the top surface being an arc surface, and the middle part being higher and the two ends being lower along both the discharge direction and the discharge section direction, exhibiting a double curvature design.

[0007] Preferably, the heating assembly includes heating rods located on both sides above the flow control plate. The heating rods are disposed in the mounting holes, which are opened in the mold body. The mold body also has a first heating cavity and a ventilation pipe. The first heating cavity is located at the bottom of the mounting hole and is interconnected with it. The heating end of the heating rod extends into the mounting hole, and the ventilation pipe is connected to the first heating cavity.

[0008] Preferably, each of the first heating chambers is equipped with a first temperature sensor, and the first temperature sensor is connected to the mold body.

[0009] Preferably, the mounting hole has an internal thread section at the top, and the heating rod has an external thread section at the top, with the external thread section and the internal thread section connected by a threaded engagement.

[0010] Preferably, the second heating component is installed in the second heating chamber, which is located in the mold body above the discharge channel. The mold body is provided with a second sensor, which extends into the second heating chamber.

[0011] Preferably, the front end of the mold body is connected to a mold lip.

[0012] Compared with the prior art, this utility model provides a flow rate control die for extrusion, which has the following advantages: This application utilizes a flow control plate to ensure a consistent velocity distribution of the molten material along the flow cross-section as it flows through the discharge channel, effectively eliminating velocity differences. Furthermore, the material is kept warm by the first and second heating components, further stabilizing its temperature and enhancing thermal uniformity, thereby significantly improving the extrusion molding quality.

[0013] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a rear view of the present invention; Figure 3 for Figure 2 Cross-sectional view along the AA direction; Figure 4 for Figure 3 Cross-sectional view along the BB direction; Figure 5 for Figure 3 A magnified view of a section at point C; In the diagram: 1. Mold body; 2. Outlet channel; 3. Inlet; 4. Flow control plate; 5. Heating component one; 6. Heating component two; 7. Mold lip; 51. Heating rod; 52. Mounting hole; 53. First heating chamber; 54. Vent pipe; 55. First temperature sensor; 511. External thread section; 521. Internal thread section; 61. Second heating chamber; 62. Second sensor. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concepts of the present utility model.

[0016] See Figures 1-5This application provides a flow rate control die for extrusion, including a die body 1. The die body 1 is provided with a discharge channel 2. The discharge channel 2 is connected to an inlet 3 at its inlet end. The discharge channel 2 is provided with a flow control plate 4, which is located at the end of the inlet 3. The die body 1 is provided with a heating component 5 and a heating component 6, which are both located above the discharge channel 2 and at the front and rear ends of the flow control plate 4, respectively.

[0017] See Figures 3-4 Specifically, the flow control plate 4 is configured as a streamlined curved surface structure with an arc-shaped top surface. It is designed with a high center and low ends along both the discharge direction and the flow cross-section direction, exhibiting a double curvature design. This design ensures that the velocity distribution of the molten material along the flow cross-section is consistent when it flows within the discharge channel, effectively eliminating velocity differences. Specific surface data can be designed and matched according to the specific processing conditions.

[0018] See Figure 4 Specifically, the heating assembly 5 includes heating rods 51 located on both sides above the flow control plate 4. The heating rods 51 are disposed within mounting holes 52, which are formed within the mold body 1. The mold body 1 also contains a first heating chamber 53 and a venting pipe 54. The first heating chamber 53 is located at the bottom of the mounting holes 52 and is interconnected with them. The heating end of the heating rods 51 extends into the mounting holes 52. The venting pipe 54 is connected to the first heating chamber 53. The venting pipe 54 is used to circulate the insulation medium and is connected to an external pump mechanism.

[0019] Specifically, each of the first heating chambers 53 is equipped with a first temperature sensor 55, which is connected to the mold body 1. The first temperature sensor 55 is used to collect and monitor the temperature inside the first heating chamber 53, and works with the heating rod 51 to heat and keep warm the molten material located at the rear end of the flow control plate 4 and on both sides of the discharge channel 2.

[0020] Specifically, the mounting hole 52 is provided with an internal thread section 521 on the upper part, and the heating rod 51 is provided with an external thread section 511 on the upper part. The external thread section 511 and the internal thread section 521 are connected by a threaded engagement.

[0021] See Figure 5 Specifically, the second heating component 6 is installed inside the second heating chamber 61, which is located inside the mold body 1 above the discharge channel 2. The mold body 1 is equipped with a second sensor 62, which extends into the second heating chamber 61. The second sensor 62 is used to collect and monitor the temperature within the second heating chamber 61, working in conjunction with the second heating component 6 to heat and maintain the overall temperature of the molten material flowing through the flow control plate 4, facilitating final extrusion.

[0022] See Figure 1 Specifically, the front end of the mold body 1 is connected to a mold lip 7.

[0023] Furthermore, in this invention, after the first temperature sensor 55 and the second temperature sensor 62 collect temperature data, they will feed it back to the external controller. Then, according to the control signal of the external controller, the heating rod 51 and the second heating component 6 will perform specific heating.

[0024] The electrical control mechanisms described in this utility model patent, including temperature sensors, controllers, and associated signal transmission modules and heating components, are all prior art known and widely used in the field. The specific model selection, internal circuit structure, and basic working principles (such as signal acquisition, data processing, and instruction output logic) of the aforementioned electrical control components have been fully disclosed in relevant professional literature and product technical manuals, and have extensive and mature application cases in fields such as automation control and intelligent devices. Those skilled in the art can directly select the appropriate components and implement conventional connections and debugging based on the parameter requirements of the actual application scenario. Therefore, to highlight the innovation of this utility model and avoid redundancy in the specification, the electrical control mechanisms within the aforementioned prior art scope will not be described in detail here.

[0025] The working principle of this utility model: Molten material is extruded into the feed port 3 through an external extruder and then enters the discharge channel 2. During this process, there will be a certain temperature drop. Therefore, the temperature inside the first heating chamber 53 is collected and monitored by the first temperature sensor 55. The heating rod 51 is used to heat and keep the molten material at the rear end of the flow control plate 4 and located on both sides of the discharge channel 2. After that, the molten material flows through the flow control plate 4. The flow control plate 4 structure controls the speed of the molten material along the flow cross section to improve the distribution consistency. Then, the temperature inside the second heating chamber 61 is collected and monitored by the second sensor 62. The heating component 6 is used to heat and keep the molten material after flowing through the flow control plate 4 until it is finally extruded from the die lip 7.

[0026] The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flow rate control die for extrusion, characterized in that: The mold includes a mold body (1), which has a discharge channel (2) inside. The discharge channel (2) has an inlet (3) connected to the inlet end. The discharge channel (2) has a flow control plate (4) inside. The flow control plate (4) is located at the end of the inlet (3). The mold body (1) has a heating component one (5) and a heating component two (6). The heating component one (5) and the heating component two (6) are both located above the discharge channel (2) and are located at the front and rear ends of the flow control plate (4), respectively.

2. The flow rate control die for extrusion as described in claim 1, characterized in that: The flow control plate (4) is configured as a streamlined curved surface structure, with the top surface being an arc surface. It is configured to be high in the middle and low at both ends along the discharge direction and the discharge section direction, exhibiting a double curvature design.

3. The flow rate control die for extrusion as described in claim 1, characterized in that: The heating component (5) includes heating rods (51) located on both sides above the flow control plate (4). The heating rods (51) are disposed in the mounting holes (52). The mounting holes (52) are opened in the mold body (1). The mold body (1) is also provided with a first heating chamber (53) and a ventilation pipe (54). The first heating chamber (53) is located at the bottom of the mounting holes (52) and is interconnected with each other. The heating end of the heating rod (51) extends into the mounting hole (52). The ventilation pipe (54) is connected to the first heating chamber (53).

4. The flow rate control die for extrusion as described in claim 3, characterized in that: Each of the first heating chambers (53) is equipped with a first temperature sensor (55), and the first temperature sensor (55) is connected to the mold body (1).

5. The flow rate control die for extrusion as described in claim 3, characterized in that: The mounting hole (52) is provided with an internal thread section (521) at the top, and the heating rod (51) is provided with an external thread section (511) at the top. The external thread section (511) and the internal thread section (521) are connected by a threaded connection.

6. The flow rate control die for extrusion as described in claim 1, characterized in that: The second heating component (6) is installed in the second heating chamber (61), which is located in the mold body (1) above the discharge channel (2). The mold body (1) is provided with a second sensor (62), which extends into the second heating chamber (61).

7. The flow rate control die for extrusion as described in claim 1, characterized in that: The front end of the mold body (1) is connected to a mold lip (7).

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