一种出料孔可调式的塑料挤压机

Abstract

本实用新型提供了一种出料孔可调式的塑料挤压机，属于塑料挤压成型设备技术领域。本实用新型实施例提供的出料孔可调式的塑料挤压机，通过在机筒上设有衔接孔，并在机筒上对应衔接孔的位置转动安装有转盘，在转盘上安装有出料孔孔径大小不同的多个塑料挤出成型头，在需要对塑料挤压机的出料孔进行调节时，仅需转动转盘以使具有目标孔径出料孔的塑料挤出成型头的插接管与机筒上的衔接孔对齐并插入衔接孔，然后通过锁定结构将转盘锁定于机筒上，便可以实现塑料挤压成型机的出料孔孔径大小的调节，使得一台塑料挤压成型机能够出多种不同规格型号的塑料制品用户在生产不同规格型号的塑料制品时无需购买多种不同的塑料挤压成型机，降低用户使用成本。

Claims

1. A plastic extruder with adjustable discharge orifice, characterized in that, include: The body of a plastic extruder includes a machine base, a barrel fixedly mounted on the machine base, a screw rotatably mounted in the barrel, and a drive motor for driving the screw to rotate. The drive motor is mounted on the machine base, and the motor shaft of the drive motor is connected to the screw via a transmission. The first axial end of the barrel is provided with a feed port, and the second axial end of the barrel is provided with a connecting hole. A rotating assembly includes a connecting shaft with its axis parallel to the axis of the barrel and a turntable rotatably mounted on the connecting shaft. The first end of the connecting shaft is fixedly connected to the second end of the barrel. The turntable has a sliding hole at its center. The turntable is fitted onto the connecting shaft through the sliding hole, so that the turntable can slide along the axis of the connecting shaft and rotate relative to the connecting shaft. Multiple plastic extrusion molding heads are fixedly mounted on the turntable. The multiple plastic extrusion molding heads are arranged at intervals along the circumference of the turntable. Each plastic extrusion molding head is provided with a discharge hole and a plug for connecting with the connecting hole. Each plug is connected to the corresponding discharge hole. The discharge hole diameter of each plastic extrusion molding head is different. as well as A locking structure is provided for locking the turntable to the second end of the machine barrel. The locking structure includes a limiting plate fixedly disposed at the second end of the connecting shaft, multiple pressing rods for pressing and fixing the turntable to the second end face of the machine barrel, a locking plate connected to the first end of each pressing rod, and a locking bolt for fixing the locking plate to the limiting plate. The locking plate has a through hole for the locking bolt to pass through, and the limiting plate has a first internal thread hole for the locking bolt to be threaded.

2. The plastic extrusion machine with adjustable discharge hole according to claim 1, characterized in that, The first end of each of the pressing rods constitutes a pressing end that presses against the turntable, and the turntable is provided with a first limiting groove for the pressing end to be inserted.

3. The plastic extrusion machine with adjustable die hole according to claim 2, characterized in that, The limiting plate is provided with guide holes to guide each of the pressing rods to move into the corresponding first limiting groove, and each of the pressing rods can be slidably inserted into the corresponding guide holes along the axial direction.

4. The plastic extrusion machine with adjustable die hole according to claim 1, wherein, The second end face of the barrel is provided with a second limiting groove to avoid and position each of the insertion tubes. When the insertion tube of one of the plastic extrusion molding heads is inserted into the connecting hole, the insertion tubes of the other plastic extrusion molding heads are respectively accommodated and positioned in the corresponding second limiting groove.

5. The plastic extrusion machine with adjustable die hole according to claim 4, characterized in that, The connecting hole is a stepped hole. Each of the insertion pipes includes a first pipe segment for insertion into the small hole of the stepped hole and a second pipe segment for insertion into the large hole of the stepped hole. The second pipe segment is integrally formed with the plastic extrusion molding head. The first pipe segment and the second pipe segment are integrally formed. The outer diameter of the second pipe segment is larger than the outer diameter of the first pipe segment, so as to form an abutting surface at the connection between the first pipe segment and the second pipe segment that can abut against the stepped surface of the stepped hole.

6. The plastic extrusion machine with adjustable die hole of claim 5, wherein, A sealing element is provided between the stepped surface and the abutting surface.

7. The plastic extrusion machine with adjustable die hole of claim 1, wherein, The turntable is provided with multiple mounting holes, and multiple plastic extrusion molding heads are fixedly installed in the multiple mounting holes one by one.

8. The plastic extrusion machine with adjustable die hole of claim 1, wherein, The locking disc is provided with a first semi-circular arc groove for positioning the plastic extrusion head.

9. The plastic extrusion machine with adjustable die hole of claim 8, wherein, The locking structure also includes a locking sleeve fitted onto the locking disc, and the locking sleeve is provided with a second semi-circular arc groove for positioning the plastic extrusion molding head.

10. A plastic extrusion machine with adjustable die hole according to any one of claims 1 to 9, characterized in that, The connecting shaft includes a threaded shaft and a sliding shaft connected to the threaded shaft. The diameter of the threaded shaft is larger than the diameter of the sliding shaft. The end face of the second end of the barrel is provided with a second internal threaded hole for threaded connection of the threaded shaft. The sliding shaft is inserted into the sliding hole. The end of the sliding shaft opposite to the threaded shaft is connected to the center position of the limiting stop plate.

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