Screw head with good color mixing plasticizing effect

Abstract

A screw head with good color mixing plasticizing effect, comprising a tapered head and a connecting part capable of being connected to a plastic machine screw, a thrust ring is arranged on the connecting part, a non-return ring is movably sleeved on the connecting part between the head and the thrust ring, a material passage capable of passing materials is left between the inner wall of the non-return ring and the outer wall of the connecting part, the end face of the non-return ring can abut against the end face of the head or the thrust ring, a discharge slot communicating with the material passage is arranged on the head, and a mixing ring capable of strengthening the mixing effect of the plastic machine screw is also sleeved on the connecting part, and the end face of the mixing ring abuts against the end face of the thrust ring. The non-return ring and the thrust ring cooperate to retain the original sealing effect, and the mixing ring is additionally arranged, so that the surface tooth element is additionally arranged on the thrust ring and the head, and the materials flowing through the corresponding positions are subjected to strong plasticization and strong color mixing.

Description

Technical Field

[0001] This utility model relates to the technical field of screw head for plasticizing machines, and more particularly to a screw head with good color mixing and plasticizing effect. Background Technology

[0002] A Chinese utility model patent with patent number CN201721726935.3, entitled "A Screw Head Assembly," discloses a screw head assembly comprising a screw head, a check ring, and a thrust ring. The screw head includes a glue-passing head and a lead screw, with the lead screw having a lead screw rod portion. The bottom surface of the glue-passing head and the end of the lead screw rod portion are vertically and fixedly connected. The thrust ring is fixedly sleeved on the lead screw rod portion and abuts against the rear of the check ring. The check ring is slidably sleeved on the lead screw rod portion between the glue-passing head and the thrust ring. The glue-passing head is characterized by three identical flow channels and three identical flanges evenly distributed, with flanges formed between the sidewall edges of adjacent flow channels. One end face of the check ring is evenly provided with three identical U-shaped grooves, which are adapted to engage with the three flanges. The cross-section of the flow channels is a fan-shaped structure, with a radial angle of 80° to 110°. This assembly can be widely applied in the field of injection molding machine parts technology. However, there is still room for improvement in the material plasticizing effect of the screw head assembly, therefore the structure of the screw head assembly needs further improvement. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a screw head with a compact structure, high color mixing efficiency, and good color mixing and plasticizing effect, in view of the above-mentioned existing technology.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: This screw head with good color mixing and plasticizing effect includes a conical head and a connecting part that can be connected to the screw of a plasticizing machine. A thrust ring is provided on the connecting part. A check ring is movably fitted on the connecting part between the head and the thrust ring. A material channel for material to pass through is left between the inner wall of the check ring and the outer wall of the connecting part. The end face of the check ring can abut against the end face of the head or the thrust ring. A discharge groove communicating with the material channel is provided on the head. The feature is that a mixing ring that can enhance the mixing effect of the plasticizing machine screw is also fitted on the connecting part. The mixing ring is in close contact with the end face of the thrust ring.

[0005] As an improvement, mixing troughs are preferably distributed at intervals on the outer wall of the mixing ring, and the mixing troughs are arranged axially. The walls of the mixing troughs can laterally push the material, increasing the axial movement of the material and improving the shearing effect.

[0006] A further improvement is made by preferably having annular grooves, which connect adjacent mixing tanks, distributed axially at intervals on the circumferential surface of the mixing ring. This increases the direction of force on the material and further improves the shearing effect.

[0007] As an improvement, the outer wall of the thrust ring can preferably be provided with two mixing tanks at intervals to further enhance the mixing effect. The tank walls of the two mixing tanks can laterally push the material, increase the axial movement of the material, and improve the shearing effect.

[0008] Further improvements include a preferred beveled end face for the thrust ring corresponding to the check ring, with a check ring recess at the end of the check ring corresponding to the beveled surface. This ensures a tight fit and good sealing effect.

[0009] As an improvement, an annular limiting protrusion can preferably be provided on the outer wall of the connecting part corresponding to the check ring. The end face of the thrust ring abuts against the limiting protrusion, and the height of the limiting protrusion gradually decreases in the direction away from the thrust ring. This serves as a limiting function and can better release the internal stress in the material, making the material more uniform.

[0010] As an improvement, the discharge trough can preferably be a circumferentially distributed connecting trough on the head, thereby improving the mixing effect.

[0011] As a further improvement, the end of the connecting groove can preferably extend to the root of the top contact surface of the check ring at the head. This makes the material discharge smoother.

[0012] A further improvement is that annular connecting grooves, which connect adjacent connecting grooves, are preferably distributed axially at intervals on the outer wall of the head. This increases the force direction on the material and further improves the shearing effect.

[0013] As an improvement, an annular groove that prevents stress concentration can preferably be provided on the connection part, thereby extending the service life of the screw head.

[0014] Compared with the prior art, the advantages of this utility model are as follows: the screw head is detachably installed on the plasticizer screw, and the mixing ability and plasticizing quality are improved through the head, check ring, thrust ring, and mixing ring; the check ring and thrust ring retain the original sealing function, and by adding the mixing ring, surface toothed elements can be added to the thrust ring and the head, which plays a strong plasticizing and strong mixing role for the material flowing through the corresponding position. Furthermore, by adjusting the number and shape of the toothed elements, the problem of uneven color mixing can be solved without changing the plasticizer screw, effectively reducing the customer's production cost. Attached Figure Description

[0015] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0016] Figure 2 for Figure 1 Top view;

[0017] Figure 3 yes Figure 2 Cross-sectional view along line AA;

[0018] Figure 4 yes Figure 1 Exploded structural diagram;

[0019] Figure 5 yes Figure 1 A structural breakdown diagram from another perspective. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] like Figures 1 to 5 As shown, the screw head with good color mixing and plasticizing effect in this embodiment includes a conical head 1 and a connecting part 10 that can be connected to the screw of the plasticizing machine. The connecting part 10 is provided with a threaded section, and the screw head is connected to the end of the screw of the plasticizing machine through the threaded section. A thrust ring 3 is provided on the connecting part 10. A check ring 2 is movably fitted on the connecting part 10 between the head 1 and the thrust ring 3. A material channel 11 for material to pass through is left between the inner wall of the check ring 2 and the outer wall of the connecting part. The end face of the check ring 2 can abut against the end face of the head 1 or the thrust ring 3. A discharge groove 12 communicating with the material channel 11 is provided on the head 1. A mixing ring 4 that can enhance the mixing effect of the screw of the plasticizing machine is also fitted on the connecting part 10. The mixing ring 4 fits against the end face of the thrust ring 3. An annular groove 102 that can prevent stress concentration is provided on the connecting part 10.

[0022] Mixing grooves 41 are spaced apart on the outer wall of the mixing ring 4, and the mixing grooves 41 are arranged along the axial direction. Annular grooves 42, connecting adjacent mixing grooves 41, are spaced apart along the axial direction on the circumferential surface of the mixing ring 4.

[0023] The outer wall of the thrust ring 3 is provided with mixing grooves 31 at intervals to further improve the mixing effect. The end face of the thrust ring 3 corresponding to the check ring 2 is a slope surface 32, and the end of the check ring 2 corresponding to the slope surface 32 is provided with a check ring recess 21.

[0024] An annular limiting protrusion 101 is provided on the outer wall of the connecting part 10 corresponding to the check ring 2. The end face of the thrust ring 3 touches the limiting protrusion 101, and the height of the limiting protrusion 101 gradually decreases in the direction away from the thrust ring 3.

[0025] The discharge trough 12 is a circumferentially distributed connecting groove on the head 1. The end of the connecting groove extends into the root of the top contact end face 13 of the check ring of the head 1. Annular connecting grooves 14, connecting adjacent connecting grooves, are distributed axially at intervals on the outer wall of the head 1.

Claims

1. A screw head with good color mixing and plasticizing effect, comprising a conical head (1) and a connecting part (10) that can be connected to a plasticizing machine screw, wherein a thrust ring (3) is provided on the connecting part (10), and a check ring (2) is movably sleeved on the connecting part (10) between the head (1) and the thrust ring (3), wherein a material channel (11) for material to pass through is provided between the inner wall of the check ring (2) and the outer wall of the connecting part, wherein the end face of the check ring (2) can abut against the end face of the head (1) or the thrust ring (3), and a discharge groove (12) communicating with the material channel (11) is provided on the head (1), characterized in that: The connecting part (10) is also fitted with a mixing ring (4) that can enhance the mixing effect of the plastic machine screw, and the mixing ring (4) is in contact with the end face of the thrust ring (3).

2. The screw head according to claim 1, characterized in that: A mixing groove (41) is distributed at intervals on the outer wall of the mixing ring (4), and the mixing groove (41) is arranged along the axial direction.

3. The screw head according to claim 2, characterized in that: On the circumferential surface of the mixing ring (4), there are annular grooves (42) that connect adjacent mixing tanks (41) at intervals along the axial direction.

4. The screw head according to any one of claims 1 to 3, characterized in that: The outer wall of the thrust ring (3) is provided with two mixing grooves (31) that can further improve the mixing effect.

5. The screw head according to claim 4, characterized in that: The end face of the thrust ring (3) corresponding to the anti-reverse ring (2) is a slope surface (32), and the end of the anti-reverse ring (2) corresponding to the slope surface (32) is provided with an anti-reverse ring recess (21).

6. The screw head according to any one of claims 1 to 3, characterized in that: An annular limiting protrusion (101) is provided on the outer wall of the connecting part (10) corresponding to the check ring (2). The end face of the thrust ring (3) touches the limiting protrusion (101). The height of the limiting protrusion (101) gradually decreases in the direction away from the thrust ring (3).

7. The screw head according to any one of claims 1 to 3, characterized in that: The discharge trough (12) is a connecting trough circumferentially distributed on the head (1).

8. The screw head according to claim 7, characterized in that: The end of the connecting groove extends into the root of the top contact end face (13) of the anti-reverse ring of the head (1).

9. The screw head according to claim 8, characterized in that: On the outer wall of the head (1), there are annular connecting grooves (14) that connect adjacent connecting grooves at intervals along the axial direction.

10. The screw head according to any one of claims 1 to 3, characterized in that: An annular groove (102) is provided on the connecting part (10) to prevent stress concentration.

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