Injection molding machine screw capable of preventing material backflow

Abstract

The utility model discloses an injection molding machine screw rod capable of preventing material backflow, which relates to the technical field of injection molding machine screw rods, and comprises a screw rod body, and a connecting groove is arranged at the end part of the screw rod body; the connecting shaft is arranged on the inner side wall of the connecting groove in a sliding mode, a first spring is arranged on the side wall of the connecting shaft, and the first spring is fixed to the inner side wall of the connecting groove; the screw head is arranged at the end part of the connecting shaft; and the multiple spiral grooves are formed in the side wall of the connecting shaft at equal intervals. The control assembly can rotate in the moving process and is matched with the groove in the screw head to convey materials, during injection molding work, the screw body is pushed by a hydraulic structure of an injection molding machine, and at the moment, the control assembly can abut against the screw body in time through contraction of the first spring, so that the screw body is prevented from being damaged. Materials are prevented from flowing back through the control assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of screw rods for injection molding machines, in particular to a screw rod for injection molding machines which can prevent material from flowing back. Background Art

[0002] The screw of the injection molding machine is an important component of the injection molding machine. It is mainly used to convey, compact, melt, stir and pressurize plastics. After the plastic moves to the end of the injection molding machine, it needs to be quantitatively output to ensure full utilization of the raw materials and injection molding effect. The power for outputting the material is pushed by the screw. During the process of screw pushing, if material reflux occurs, the quality of the injection molded product will be reduced. Therefore, an injection molding machine screw that can prevent material reflux is needed.

[0003] In the prior art, in order to prevent the material from flowing back, the material is generally pushed to move by moving the end to achieve the purpose of preventing the material from flowing back. For example, the Chinese utility model patent with publication number CN203557661U discloses an injection molding machine screw for preventing the material from flowing back, including: a feeding section, a compression section connected to the feeding section, a homogenizing section connected to the compression section, and an inlay section movably connected to the homogenizing section; the homogenizing section is provided with a clamping assembly, a guide member connected to the clamping assembly and allowing the inlay section to move away from the homogenizing section after the screw rotates; the inlay section is provided with a limit assembly clamped with the above-mentioned clamping assembly.

[0004] In this technical solution, when the screw does not rotate, the movement of the screw is utilized to prevent the material from flowing back. However, during the movement, the material out of the output port of the injection molding machine will be squeezed, resulting in material waste. Utility Model Content

[0005] The utility model aims to provide an injection molding machine screw which can prevent material from flowing back, so as to solve the technical problems in the prior art.

[0006] The utility model provides an injection molding machine screw for preventing material backflow, comprising:

[0007] A screw body, wherein a connecting groove is provided at the end of the screw body;

[0008] A connecting shaft, the connecting shaft being slidably disposed on the inner side wall of the connecting groove;

[0009] A reset component, wherein the reset component is arranged on the inner side wall of the connecting groove and is connected to the connecting shaft;

[0010] A plurality of spiral grooves, wherein the plurality of spiral grooves are equidistantly arranged on the side wall of the connecting shaft;

[0011] A plurality of protrusions, wherein the plurality of protrusions are slidably connected to the plurality of spiral grooves in a one-to-one manner;

[0012] A control component, the control component is fixed to the protrusion, and the control component is used to control the material output;

[0013] A plurality of accommodating components are arranged at equal distances at the end of the screw body.

[0014] Preferably, the control component comprises:

[0015] A partition plate, the partition plate is arranged on the side walls of the plurality of protrusions;

[0016] A plurality of material holes are provided, and the plurality of material holes are equidistantly penetrated and opened on the side wall of the partition.

[0017] Preferably, it also includes:

[0018] The screw head is arranged at the end of the connecting shaft, and a plurality of grooves are opened on the side wall of the screw head, and the grooves correspond to the material holes one by one.

[0019] Preferably, the housing assembly comprises:

[0020] A circular groove, wherein the circular groove is provided at the end of the screw body;

[0021] A piston block is slidably arranged in the circular groove.

[0022] Preferably, it also includes:

[0023] The second spring is arranged on the inner wall of the circular groove, and the second spring and the piston block are fixed.

[0024] Preferably, it also includes:

[0025] A polygonal groove, wherein the polygonal groove is provided on the inner side wall of the connecting groove;

[0026] The prism is slidably arranged in the polygonal groove, and the prism and the connecting shaft are fixed.

[0027] Preferably, the reset component comprises:

[0028] The first spring is arranged at the end of the connecting shaft, and the first spring is fixed to the inner side wall of the connecting groove.

[0029] Compared with the prior art, the beneficial effects of the utility model are:

[0030] The utility model can realize that during use, when conveying materials, the screw body rotates to realize material conveying through the provided connecting shaft, control component, spiral groove, protrusion and screw head. When the material contacts the control component, the control component is pushed to move. Under the action of the spiral groove and the protrusion, the control component rotates during the movement, and cooperates with the groove on the screw head to realize material conveying. When performing injection molding, the screw body is pushed by the hydraulic structure of the injection molding machine. At this time, through the contraction of the first spring, the control component can timely contact the screw body to prevent the material from flowing back through the control component. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0032] Figure 2 It is a schematic diagram of the exploded structure of the screw body, the connecting shaft and the screw head of the utility model;

[0033] Figure 3 It is a schematic diagram of the explosion structure of the connecting shaft and the partition of the utility model;

[0034] Figure 4 It is a schematic diagram of the cross-sectional structure of the screw body of the utility model.

[0035] Reference numerals:

[0036] 1. Screw body; 2. Partition plate; 3. Screw head; 4. Groove; 5. Material hole; 6. Connecting shaft; 7. Circular groove; 8. Connecting groove; 9. Spiral groove; 10. Bump; 11. First spring; 12. Piston block; 13. Second spring; 14. Prism. DETAILED DESCRIPTION

[0037] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] Combine the following Figures 1 to 4 As shown, the embodiment of the utility model provides an injection molding machine screw for preventing material backflow, comprising:

[0039] The screw body 1 has a connecting groove 8 at the end thereof;

[0040] A connecting shaft 6, which is slidably disposed on the inner wall of the connecting groove 8;

[0041] A reset assembly, which is arranged on the inner wall of the connecting groove 8 and is connected to the connecting shaft 6;

[0042] A plurality of spiral grooves 9, wherein the plurality of spiral grooves 9 are equidistantly arranged on the side wall of the connecting shaft 6;

[0043] A plurality of protrusions 10, wherein the plurality of protrusions 10 and the plurality of spiral grooves 9 are slidably connected one to one;

[0044] A control component, the control component is fixed to the protrusion 10, and the control component is used to control the material output;

[0045] A plurality of accommodating components are arranged at equal distances at the end of the screw body 1 .

[0046] The reset components include:

[0047] The first spring 11 is arranged at the end of the connecting shaft 6 , and the first spring 11 is fixed to the inner wall of the connecting groove 8 .

[0048] In the process of conveying materials, the power mechanism of the injection molding machine drives the screw body 1 to rotate, and the screw body 1 pushes the material to move during the rotation. When the material approaches the control component, the control component is pushed to move along the connecting shaft 6. In this process, under the action of the spiral groove 9 and the protrusion 10, the control component moves and rotates at the same time, so that the material continues to move;

[0049] During the injection molding process, the hydraulic mechanism of the injection molding machine pushes the screw body 1 to move. During the movement, under the resistance of the material, the control assembly and the connecting shaft 6 shrink into the connecting groove 8. As the screw body 1 continues to move, the control assembly and the screw body 1 collide with each other, thereby preventing the material from flowing back through the control assembly.

[0050] Furthermore, the control component includes:

[0051] A partition 2, the partition 2 is arranged on the side walls of the plurality of protrusions 10;

[0052] A plurality of material holes 5 are provided on the side wall of the partition plate 2 at equal distances.

[0053] Also includes:

[0054] The screw head 3 is arranged at the end of the connecting shaft 6. The side wall of the screw head 3 is provided with a plurality of grooves 4, and the grooves 4 correspond to the material holes 5 one by one.

[0055] When the partition 2 is close to the screw head 3, the partition 2 rotates, thereby causing the material hole 5 on the partition 2 to rotate. When the partition 2 and the screw head 3 collide, the material hole 5 is in the groove 4. At this time, the material is discharged through the material hole 5 and the groove 4.

[0056] During the injection molding process, the connecting shaft 6 first shrinks into the connecting groove 8, compressing the first spring 11, so that the partition 2 can quickly contact the screw body 1, sealing the material hole 5, thereby preventing the material from flowing back through the material hole 5. As the screw body 1 continues to move, the partition 2 moves along the connecting shaft 6 through the protrusion 10 and the spiral groove 9, and rotates to achieve the reset of the partition 2.

[0057] Furthermore, the accommodation component includes:

[0058] A circular groove 7, which is provided at the end of the screw body 1;

[0059] The piston block 12 is slidably disposed in the circular groove 7 .

[0060] Also includes:

[0061] The second spring 13 is arranged on the inner wall of the circular groove 7, and the second spring 13 and the piston block 12 are fixed.

[0062] When the screw body 1 is pushed, the connecting shaft 6 shrinks into the connecting groove 8. At this time, the material between the partition 2 and the screw body 1 in the injection molding machine can enter the circular groove 7 and be temporarily stored. The second spring 13 is compressed by the piston block 12. When the partition 2 is reset, the second spring 13 cooperates with the piston block 12 to push the material in the circular groove 7 out.

[0063] Furthermore, it also includes:

[0064] A polygonal groove is provided on the inner wall of the connecting groove 8;

[0065] The prism 14 is slidably disposed in the polygonal groove, and the prism 14 and the connecting shaft 6 are fixed.

[0066] The prism 14 and the polygonal groove enable the connecting shaft 6 to drive the connecting shaft 6 and the screw head 3 to rotate synchronously during the rotation of the screw body 1 .

Claims

1. An injection molding machine screw for preventing material backflow, characterized in that: include: A screw body (1), wherein the end of the screw body (1) is provided with a connecting groove (8); A connecting shaft (6), wherein the connecting shaft (6) is slidably arranged on the inner wall of the connecting groove (8); A reset component, the reset component is arranged on the inner side wall of the connecting groove (8), and the reset component is connected to the connecting shaft (6); A plurality of spiral grooves (9), wherein the plurality of spiral grooves (9) are arranged at equal distances on the side wall of the connecting shaft (6); A plurality of protrusions (10), wherein the plurality of protrusions (10) and the plurality of spiral grooves (9) are slidably connected in a one-to-one manner; A control component, the control component and the protrusion (10) are fixed, and the control component is used to control the output of the material; A plurality of containing assemblies are provided, and the plurality of containing assemblies are arranged at equal distances at the end of the screw body (1).

2. The screw for an injection molding machine for preventing material backflow according to claim 1, characterized in that: The control component comprises: A partition (2), wherein the partition (2) is arranged on the side walls of the plurality of protrusions (10); A plurality of material holes (5) are provided, and the plurality of material holes (5) are equidistantly penetrated and opened on the side wall of the partition plate (2).

3. The screw for an injection molding machine for preventing material backflow according to claim 2, characterized in that: Also includes: A screw head (3) is arranged at the end of a connecting shaft (6), and a plurality of grooves (4) are provided on the side wall of the screw head (3), and the grooves (4) correspond to the material holes (5) one by one.

4. The screw for an injection molding machine for preventing material backflow according to claim 1, characterized in that: The receiving assembly comprises: A circular groove (7), wherein the circular groove (7) is provided at the end of the screw body (1); A piston block (12) is slidably arranged in the circular groove (7).

5. The screw for an injection molding machine for preventing material backflow according to claim 4, characterized in that: Also includes: A second spring (13), wherein the second spring (13) is arranged on the inner wall of the circular groove (7), and the second spring (13) and the piston block (12) are fixed.

6. The screw for an injection molding machine for preventing material backflow according to claim 1, characterized in that: Also includes: A polygonal groove, the polygonal groove being formed on the inner side wall of the connecting groove (8); A prism (14) is slidably arranged in the polygonal groove, and the prism (14) and the connecting shaft (6) are fixed.

7. The screw for an injection molding machine for preventing material backflow according to claim 1, characterized in that: The reset component comprises: A first spring (11), wherein the first spring (11) is arranged at the end of the connecting shaft (6), and the first spring (11) is fixed to the inner side wall of the connecting groove (8).

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