PVC (polyvinyl chloride) pipe extrusion die

Abstract

The utility model provides a PVC (polyvinyl chloride) pipe extrusion die, which comprises a connector, a connector and a mouth die, the connector is communicated with one side of the connector and is used for being connected with an extruder head, and the mouth die is communicated with one side of the connector deviating from the connector. A core rod is fixedly arranged on one side of the splitter plate and extends into the mouth mold, an extrusion channel is formed between the core rod and the inner wall of the mouth mold, a splitter cone is fixedly arranged on the side, away from the core rod, of the splitter plate, the side, facing the connector, of the splitter cone is in a peach shape, and splitter channels with the same height are formed between the splitter cone and the inner wall of the connector. And a plurality of shunting holes for communicating the shunting channel with the extrusion channel are formed in the shunting plate. The device has the advantage of improving the productivity.

Description

Technical Field

[0001] This utility model relates to the field of extrusion die design technology, and in particular to a PVC pipe extrusion die. Background Technology

[0002] The extruder die is a key component installed at the extruder outlet, used to extrude heated and molten materials such as plastics, rubber, or metals through a channel of a specific shape.

[0003] When processing pipes, the pipes are formed and extruded by installing an extrusion die on an extruder. The invention patent disclosed in the prior art, such as the one with publication number CN102275287A entitled "High-speed CPVC pipe extrusion die", includes a flange and a die head connector installed on the die head of the extruder. A die is installed inside the opening of the die head connector, and a die pressure plate is installed outside the die. The die pressure plate is fixed to the die head connector by screws. A mandrel is installed inside the die, and an extrusion cavity is formed between the mandrel and the die.

[0004] As the output of twin-screw extruders increases, the design of the flow divider cone during extrusion, achieved by using the aforementioned extrusion die, causes the flow divider cavity to gradually shrink towards the die, resulting in a slower throughput of pipe material and impacting actual production efficiency. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a PVC pipe extrusion die to solve the technical problem of low production efficiency caused by unreasonable design of existing flow divider cones and flow dividers.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A PVC pipe extrusion die includes a connector, a connecting body, and a die. The connector is connected to one side of the connecting body and is used to connect to the extruder head. The die is connected to the side of the connecting body opposite to the connector. The connecting body is characterized by: a flow divider plate inside the connecting body; a mandrel fixed to one side of the flow divider plate; the mandrel extending into the die; an extrusion channel formed between the mandrel and the inner wall of the die; a flow divider cone fixed to the side of the flow divider plate opposite to the mandrel; the flow divider cone facing the connector is peach-shaped; a flow divider channel of uniform height is formed between the flow divider cone and the inner wall of the connecting body; and several flow divider holes are provided on the flow divider plate to connect the flow divider channel with the extrusion channel.

[0008] The present invention is further configured such that: the circumferential height of the extrusion channel is the same, and the axial height of the extrusion channel gradually decreases in a funnel shape as the mandrel extends.

[0009] The present invention is further configured such that the corners of the inner wall of the diversion channel are all rounded.

[0010] The present invention is further configured such that the die, mandrel, and flow divider cone are coaxially arranged.

[0011] The present invention is further configured such that the tip of the split cone shaft is directly opposite the shaft of the connector and the discharge end of the extruder head.

[0012] The present invention is further configured such that the connector, the connector body and the die are all fixedly connected by bolts.

[0013] Compared with existing technologies, the beneficial effects achieved by this device are:

[0014] This device is a PVC pipe extrusion die, mainly used to be installed at the extrusion port of an extruder to shape the pipe material extruded by the extruder. By designing the flow divider cone in a peach shape, the pipe material can be effectively separated at the peach-shaped tip, facilitating the entry of the pipe material into the flow divider channel. Through the designed flow divider channels of uniform height, the flow rate of the material passing through the flow divider cone can be effectively increased, thereby increasing the pipe extrusion speed and further improving production efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the overall structure of an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the overall structure of the manifold.

[0018] In the above figures: 1. Connector; 2. Connector body; 3. Die; 4. Diverter plate; 5. Mandrel; 6. Extrusion channel; 7. Diverter cone; 8. Diverter channel; 9. Diverter hole. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0020] Example:

[0021] Reference Figures 1-3This application discloses a PVC pipe extrusion die, comprising a connector 1, a connector 2, and a die 3. The connector 1 is connected to one side of the connector 2 and is used to connect to the extruder head. The die 3 is connected to the side of the connector 2 opposite to the connector 1. The connection 2 is characterized in that a flow divider 4 is provided inside the connector 2, and a mandrel 5 is fixedly provided on one side of the flow divider 4. The mandrel 5 extends into the die 3, and an extrusion channel 6 is formed between the mandrel 5 and the inner wall of the die 3. The die 3, the mandrel 5, and the flow divider cone 7 are coaxially arranged.

[0022] The extrusion channel 6 has the same circumferential height, and the axial height of the extrusion channel 6 gradually narrows in a funnel shape as the mandrel 5 extends. This design can effectively allow the raw material to be extruded from the die 3 gradually and evenly through the axial narrowing of the extrusion channel 6 to form a tube shape.

[0023] like Figure 2 As shown, a flow divider cone 7 is fixed on the side of the flow divider plate 4 away from the mandrel 5. The side of the flow divider cone 7 facing the connector 1 is peach-shaped, and the tip of the cone 7 is aligned with the axis of the connector 1 and the discharge end of the extruder head. A flow divider channel 8 with the same height is formed between the flow divider cone 7 and the inner wall of the connector 2. The corners of the inner wall of the flow divider channel 8 are all rounded. This rounded design facilitates the passage of pipe material without creating significant resistance that could affect the flow rate of the pipe material, thus improving the efficiency of pipe production. Figure 2 and Figure 3 As shown, the flow divider plate 4 has several flow divider holes 9 that connect the flow divider channel 8 and the extrusion channel 6. It is worth mentioning that this design, through the above structure, can increase the original production capacity of 8-10 tons to 18-22 tons in actual use, demonstrating a significant increase in production capacity.

[0024] Working principle:

[0025] In use, simply install this device on the extruder head, and the pipe material will be extruded and used. The pipe material first enters the connector 1, and then enters the connector body 2 through the connector 1. Through the separation of the flow divider cone 7, the pipe material enters the distribution channel, and then enters the extrusion channel 6 through several distribution holes on the distribution plate. Finally, the pipe material is formed and extruded through the extrusion channel 6 and the die 3.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A PVC pipe extrusion die, comprising a connector (1), a connector (2), and a die (3), wherein the connector (1) is disposed on one side of the connector (2) and is used to connect to the extruder head, and the die (3) is disposed on the side of the connector (2) opposite to the connector (1), characterized in that: The connector (2) is provided with a flow divider plate (4), and a mandrel (5) is fixed on one side of the flow divider plate (4). The mandrel (5) extends into the die (3). An extrusion channel (6) is formed between the mandrel (5) and the inner wall of the die (3). A flow divider cone (7) is fixed on the side of the flow divider plate (4) away from the mandrel (5). The side of the flow divider cone (7) facing the connector (1) is peach-shaped. A flow divider channel (8) with the same height is formed between the flow divider cone (7) and the inner wall of the connector (2). A number of flow divider holes (9) are opened on the flow divider plate (4) to connect the flow divider channel (8) and the extrusion channel (6).

2. The PVC pipe extrusion die according to claim 1, characterized in that: The extrusion channel (6) has the same circumferential height, and the axial height of the extrusion channel (6) gradually decreases in a funnel shape as the mandrel (5) extends.

3. The PVC pipe extrusion die according to claim 1, characterized in that: The inner corners of the diversion channel (8) are all smoothly rounded.

4. The PVC pipe extrusion die according to claim 1, characterized in that: The die (3), mandrel (5), and flow divider (7) are coaxially arranged.

5. A PVC pipe extrusion die according to claim 4, characterized in that: The tip of the split cone (7) is directly opposite the axis of the connector (1) and the discharge end of the extruder head.

6. The PVC pipe extrusion die according to claim 1, characterized in that: The connector (1), connector (2) and die (3) are all fixedly connected by bolts.

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