Die head of double-screw extruder

Abstract

The utility model relates to the field of extruders, in particular to a double-screw extruder die head, which comprises an extruder flange, a die head flange, a die head, a die head fixing block, a shunting frame, a first flow disc, a second flow disc and a third flow disc, the die head flange is connected with the extruder flange, the shunting frame is arranged in an output flow channel of the die head, and the first flow disc is connected with the second flow disc. A supporting block is arranged in the die head, the first flow disc, the second flow disc and the third flow disc are sequentially arranged on the left side of the supporting block rightwards, discharging holes are annularly formed in the first flow disc, the second flow disc and the third flow disc, the hole diameters of the discharging holes are sequentially reduced, the discharging holes do not shield one another, and a fan-shaped channel communicated with an output runner is formed in the die head. Adjusting rods penetrating out of the fan-shaped channels are arranged on the first flow disc, the second flow disc and the third flow disc correspondingly, the die head fixing block is fixed to the left side of the die head, a protruding block for pre-tightening the third flow disc is arranged at the right end of the die head fixing block, the whole extrusion die head does not need to be completely detached and replaced, and use is more convenient.

Description

Technical Field

[0001] The utility model relates to the field of extruders, in particular to a die head of a twin-screw extruder. Background Art

[0002] The die head of the twin-screw extruder is a precision component in the modified plastic equipment. The extrusion system of the extruder is an important part of the extruder. The extrusion system includes screw, barrel, die head, extrusion die head, etc. At present, the die head of the extruder generally adopts an integral structure, which is large in size and can only extrude pipes of one diameter. When the extrusion processing pipe diameter needs to be changed, it is often necessary to completely disassemble the entire extrusion die head and reinstall the extrusion die head after maintenance or replacement. It is not only time-consuming and labor-intensive, but also due to repeated disassembly and assembly, local wear is inevitable during the process, resulting in reduced installation accuracy, which seriously affects the quality of pipe extrusion processing.

[0003] Therefore, in order to solve the deficiencies in the prior art, a twin-screw extruder die head with a simple structure needs to be designed. Utility Model Content

[0004] The utility model provides a twin-screw extruder die head to solve the problems of the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a twin-screw extruder die head comprises: an extruder flange, a die flange, a die head, a die head fixing block, a diverter frame, a first flow disk, a second flow disk and a third flow disk, the die head flange is connected to the extruder flange, the diverter frame is arranged in the output flow channel of the die head, a support block is arranged inside the die head, the first flow disk, the second flow disk and the third flow disk are arranged to the right on the left side of the support block in sequence, the first flow disk, the second flow disk and the third flow disk are annularly provided with discharge holes with apertures decreasing in sequence and not blocking each other, the die head is provided with a fan-shaped channel connecting the output flow channel, the first flow disk, the second flow disk and the third flow disk are all provided with adjustment rods passing through the fan-shaped channel, the die head fixing block is fixed to the left side of the die head and a protrusion for pre-tightening the third flow disk is provided at the right end.

[0006] As a further improvement, a filter screen is provided between the extruder flange and the die head flange, and the filter screen is located on the right side of the output flow channel.

[0007] As a further improvement, the first flow disc is provided with an annular groove 1 on the left side, the second flow disc is provided with an annular protrusion 1 matching the annular groove 1 on the right side, the second flow disc is provided with an annular groove 2 on the left side, and the third flow disc is provided with an annular protrusion 2 matching the annular groove 2 on the right side.

[0008] As a further improvement, the fan-shaped channels and the adjusting rods are provided in two groups symmetrically up and down.

[0009] Compared with the prior art, the twin-screw extruder die head of the utility model has the following beneficial effects:

[0010] The material extruded by the extruder moves to the left from the output flow channel. The diameter of the extruded material needs to be large in diameter. The second flow disc and the third flow disc are rotated relative to the first flow disc by controlling the adjusting rod, and only the discharge hole with the largest diameter on the first flow disc is exposed; the diameter of the extruded material needs to be medium in diameter. The second flow disc is overlapped with the discharge holes on the first flow disc by controlling the adjusting rod, and the third flow disc is staggered relative to the second flow disc, and the material is discharged through the discharge hole with the medium diameter of the second flow disc; the diameter of the extruded material needs to be small in diameter. The second flow disc and the third flow disc are rotated relative to the first flow disc by controlling the adjusting rod so that the three groups of discharge holes overlap, and the material is discharged through the discharge hole with the small diameter of the third flow disc. Only the relative positions of the first flow disc, the second flow disc and the third flow disc need to be adjusted to provide three groups of discharge modes. There is no need to completely disassemble and replace the entire extrusion die head, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of the utility model

[0012] Figure 2 This is a structural diagram of a partially enlarged view of the utility model

[0013] Figure 3 This is a schematic diagram of the structure of a partial die head in the utility model.

[0014] Figure 4 This is a schematic diagram of the structure of the first flow disc in the utility model

[0015] Figure 5 This is a schematic diagram of the structure of the second flow disc in the utility model

[0016] Figure 6 This is a schematic diagram of the structure of the third flow disc in the utility model

[0017] In the figure, 1-extruder flange, 11-filter screen, 2-die flange, 3-die, 31-output flow channel, 32-support block, 33-fan-shaped channel, 4-die fixing block, 41-bump, 5-dividing frame, 6-first flow disk, 61-annular groove one, 7-second flow disk, 71-annular bump one, 72-annular groove two, 8-third flow disk, 81-annular bump two, 91-discharge hole, 92-adjusting rod. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] Below is a combination of the embodiments and the attached Figures 1 to 6 , the technical solution of the utility model is further elaborated.

[0021] Example 1

[0022] A twin-screw extruder die head, comprising: an extruder flange 1, a die head flange 2, a die head 3, a die head fixing block 4, a diverter frame 5, a first flow disc 6, a second flow disc 7 and a third flow disc 8, the die head flange 2 is connected to the extruder flange 1, the diverter frame 5 is arranged in the output flow channel 31 of the die head 3, a support block 32 is arranged inside the die head 3, the first flow disc 6, the second flow disc 7 and the third flow disc 8 are arranged to the right on the left side of the support block 32 in sequence, the first flow disc 6, the second flow disc 7 and the third flow disc 8 are annularly provided with discharge holes 91 with apertures decreasing in sequence and not blocking each other, the die head 3 is provided with a fan-shaped channel 33 connected to the output flow channel 31, the first flow disc 6, the second flow disc 7 and the third flow disc 8 are all provided with an adjusting rod 92 passing through the fan-shaped channel 33, the die head fixing block 4 is fixed to the left side of the die head 3 and a protrusion 41 for pre-tightening the third flow disc 8 is provided at the right end.

[0023] like Figure 1-2As shown, the use principle of the utility model is as follows: the material extruded by the extruder moves to the left from the output flow channel 31, and the diameter of the extruded material needs to be large in diameter. The second flow disc 7 and the third flow disc 8 are rotated relative to the first flow disc 6 by controlling the adjusting rod 92, and only the discharge hole 91 with the largest diameter on the first flow disc 6 is exposed; the diameter of the extruded material needs to be medium in diameter, and the second flow disc 7 is overlapped with the discharge hole 91 on the first flow disc 6 by controlling the adjusting rod 92, and the third flow disc 8 is staggered relative to the second flow disc 7, and the material is discharged through the discharge hole 91 with the medium diameter of the second flow disc 7; the diameter of the extruded material needs to be small in diameter, and the second flow disc 7 and the third flow disc 8 are rotated relative to the first flow disc 6 by controlling the adjusting rod 92 so that the three groups of discharge holes 91 overlap, and the material is discharged through the discharge hole 91 with the small diameter of the third flow disc 8. It is only necessary to adjust the relative positions of the first flow disc 6, the second flow disc 7 and the third flow disc 8 to provide three groups of discharge modes, without the need to completely disassemble and replace the entire extrusion die head, and it is more convenient to use.

[0024] As a further preferred embodiment, a filter screen 11 is provided between the extruder flange 1 and the die head flange 2. The filter screen 11 is located on the right side of the output flow channel 31. The filter screen 11 filters some fine impurities in the material to improve the quality of the extruded material.

[0025] As a further preferred embodiment, the first flow disk 6 is provided with an annular groove 61 on the left side, the second flow disk 7 is provided with an annular protrusion 71 matching the annular groove 61 on the right side, the second flow disk 7 is provided with an annular groove 72 on the left side, and the third flow disk 8 is provided with an annular protrusion 81 matching the annular groove 72 on the right side. The concentricity between the flow disks is increased by matching the annular protrusions and annular grooves.

[0026] As a further preferred embodiment, the fan-shaped channels 33 and the adjusting rods 92 are symmetrically provided in two groups, and the upper adjusting rod 92 or the lower adjusting rod 92 can be rotated for adjustment, thereby improving the convenience of adjustment.

[0027] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A twin-screw extruder die head, characterized in that, include: Extruder flange, die flange, die, die fixing block, diverter rack, first flow disk, second flow disk and third flow disk, the die flange is connected to the extruder flange, the diverter rack is arranged in the output flow channel of the die, a support block is arranged inside the die, the first flow disk, the second flow disk and the third flow disk are arranged on the left side of the support block in sequence to the right, the first flow disk, the second flow disk and the third flow disk are ringed with discharge holes with decreasing apertures in sequence and not blocking each other, the die is provided with a fan-shaped channel connecting the output flow channel, the first flow disk, the second flow disk and the third flow disk are all provided with adjustment rods passing through the fan-shaped channel, the die fixing block is fixed to the left side of the die and a protrusion for pre-tightening the third flow disk is provided on the right end.

2. A twin-screw extruder die head according to claim 1, characterized in that, A filter screen is arranged between the extruder flange and the die head flange, and the filter screen is located on the right side of the output flow channel.

3. A twin-screw extruder die head according to claim 1, characterized in that, The first flow disc has an annular groove 1 on the left side, the second flow disc has an annular protrusion 1 on the right side that matches the annular groove 1, the second flow disc has an annular groove 2 on the left side, and the third flow disc has an annular protrusion 2 on the right side that matches the annular groove 2.

4. A twin-screw extruder die head according to claim 1, characterized in that, The fan-shaped channels and the adjusting rods are symmetrically arranged in two groups.

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