CN202283778U - Extrusion die in one-to-eight plastic pipe production equipment - Google Patents

Abstract

The utility model discloses an extrusion die in the production equipment of one out of eight plastic pipes, which comprises: a mold cavity and a die head, a flow channel is arranged in the cavity, and a flow channel inlet and a flow channel are arranged on the flow channel outlet, the die head is connected to the outlet of the flow channel, the flow channel is a three-stage bifurcated flow channel, and its structure is: the end of the main flow channel branches out into two primary secondary flow channels, each The end of the primary secondary flow channel is branched into two secondary secondary flow channels, the end of each secondary secondary flow channel is branched into two tertiary secondary flow channels, and the end of each tertiary secondary flow channel is provided with The outlet of the flow channel is connected with a die head at the outlet of each flow channel. The utility model has the advantages of simple structure, adopting three-level bifurcated flow channels, so that the materials can be evenly distributed to the flow channels at all levels, and one flow channel inlet corresponds to eight flow channel outlets, which greatly improves the production efficiency. This greatly increases productivity.

Description

Extrusion die in one out of eight plastic pipe production equipment

technical field

The utility model relates to plastic pipe production equipment, in particular to an extrusion die in the one-out eight plastic pipe production equipment.

Background technique

Plastic pipe production equipment mainly includes conical twin-screw extruder, extrusion die, vacuum setting device, cooling device, traction device, cutting device and other parts. After the raw materials are mixed, they enter the conical twin-screw extruder. The conical twin-screw extruder plasticizes the raw materials and then pushes them into the extrusion die. The extrusion die is a key part of pipe forming. Cast aluminum heater, the preliminarily formed plastic pipe comes out of the extrusion mold and enters the vacuum setting device, sized under the action of cold water and vacuum, the formed pipe enters the cooling device for cooling, and then is pulled by the traction device to the cutting device Make a cut. At present, the structure of the extrusion die in the plastic pipe production equipment mainly includes: a cavity body and a die head, an external cast aluminum heater is arranged outside the cavity body, and a flow channel is arranged inside the cavity body, and the heated material It enters from the inlet of the runner and flows out from the outlet of the runner. A die is arranged at the outlet of the runner, and what comes out from the outlet of the die is the preliminarily formed plastic pipe. In the above structure, a commonly used flow channel structure form is that one flow channel inlet corresponds to one flow channel outlet. The disadvantage of this structure form is that the production efficiency is very low; another commonly used flow channel structure form is a flow channel The inlet is directly divided into four flow channel outlets. The disadvantage of this structure is that the number of flow channel outlets formed by one division has been maximized. If the number of flow channel outlets formed by one division is increased, it will be difficult to guarantee the quality. The production of plastic pipes can be completed in a large amount, so the production efficiency is difficult to further improve.

Utility model content

The problem to be solved by the utility model is to provide an extrusion die in a plastic pipe production equipment with one flow channel inlet corresponding to eight flow channel outlets, which can greatly improve production efficiency.

In order to solve the above-mentioned problems, the technical solution adopted by the utility model is: the extrusion die in the production equipment of one out of eight plastic pipes includes: a cavity body and a die head, a flow channel is arranged in the cavity, and a flow channel is set on the flow channel There is a runner inlet and a runner outlet, the die head is connected to the outlet of the runner, the runner is a three-stage bifurcated runner, and its structure is: the end of the main runner is branched out into two Secondary flow channels, the end of each primary secondary flow channel branches out into two secondary secondary flow channels, and the end of each secondary secondary flow channel branches out into two tertiary secondary flow channels, each tertiary secondary flow channel The ends of the flow channels are all provided with flow channel outlets, and each flow channel outlet is connected with a die head.

Further, in the extrusion die in the aforementioned one-out-eight plastic pipe production equipment, heating rods are evenly arranged laterally on both sides of the flow channel in the mold cavity.

The utility model has the advantages of simple structure, adopting three-level bifurcated flow channels, so that the materials can be evenly distributed to the flow channels at all levels, and one flow channel inlet corresponds to eight flow channel outlets, so that eight plastic pipes can be formed at one time , which greatly improves the production efficiency, thereby greatly improving the production capacity; after a number of heating rods are evenly arranged horizontally on both sides of the flow channels at all levels, the materials in the flow channels are heated more evenly, which avoids the external heating mode of the mold cavity. The uneven wall thickness of the cavity leads to uneven heating of the material in the flow channel.

Description of drawings

Fig. 1 is a schematic structural view of an extrusion die described in the present invention.

Fig. 2 is a schematic cross-sectional view of A-A in Fig. 1 .

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

As shown in Fig. 1 and Fig. 2, the extrusion die in the production equipment of eight plastic pipes includes: a die cavity body and a die head 5, and the die cavity body is composed of a main die cavity body 1 and two structurally identical The secondary mold cavity 2 is composed of the main mold cavity 1 and the two secondary mold cavities 2. Three-stage bifurcated runners are arranged in the main mold cavity 1 and the two secondary mold cavities 2. The material enters from the runner inlet 3 and flows out from the runner outlet 4. The specific structure is: the end of the main flow channel 6 in the main mold cavity 1 branches out two primary secondary flow channels 7, each primary secondary flow channel 7 is connected with a secondary mold cavity 2, each primary The end of the secondary flow channel 7 branches out into two secondary secondary flow channels 8, and the end of each secondary secondary flow channel 8 branches out into two tertiary secondary flow channels 9, and the end of each tertiary secondary flow channel 9 They are all provided with runner outlets 4, and each runner outlet 4 is provided with a die head 5. Heating rods 10 are arranged laterally on both sides of the flow channels of each level in the main mold cavity 1 and the two secondary mold cavities 2, and the heating rods 10 are evenly arranged along the flow direction of materials in the flow channels of each level.

During production, the material enters the main flow channel 6 from the flow channel inlet 3, then divides from the main flow channel 6 to two primary secondary flow channels 7, and then divides from the two primary secondary flow channels 7 to four In two secondary sub-runners 8, then from four secondary sub-runners 8, it is divided into eight three-level sub-runners 9, and then from eight flow channel outlets at the ends of eight three-level sub-runners 9. 4 into the corresponding eight die heads 5 respectively, and the eight pipes that come out from the eight die heads 5 are basically formed eight pipes, and the eight pipes can enter the next process for shaping and cooling. Since a number of heating rods 10 are evenly arranged horizontally on both sides of the flow channels at all levels, the materials can be evenly heated in the flow channels at all levels, so as to avoid the phenomenon that the flow of materials is not smooth due to cooling.

The utility model has the advantages of simple structure, adopting three-stage bifurcated flow channels, so that the materials can be evenly distributed to the flow channels at all levels, one flow channel inlet corresponds to eight flow channel outlets, and one flow channel inlet corresponds to eight flow channels Road export, which greatly improves the efficiency of production, thereby greatly increasing production capacity. After a number of heating rods are evenly arranged horizontally on both sides of the flow channels at all levels, the materials in the flow channels at all levels are heated more evenly, which avoids the material in the flow channels caused by the uneven wall thickness of the cavity body in the external heating mode of the cavity body. Uneven heating conditions.

Claims (2)

1. The extrusion die in the production equipment of one out of eight plastic pipes, including: a mold cavity body and a die head, a flow channel is arranged in the cavity body, and a flow channel inlet and a flow channel outlet are arranged on the flow channel. The die head is connected at the outlet of the flow channel, and it is characterized in that: the flow channel is a three-level bifurcated flow channel, and its structure is: the end of the main flow channel branches out into two primary flow channels, each with a The end of the secondary flow channel is branched into two secondary flow channels, the end of each secondary flow channel is branched into two tertiary flow channels, and the end of each tertiary flow channel is provided with a flow Channel outlet, each flow channel outlet is connected with a die. 2. The extrusion die in the production equipment of one out of eight plastic pipes according to claim 1, characterized in that heating rods are evenly arranged in the transverse direction on both sides of the flow channel in the mold cavity.

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