Screw mechanism of injection molding machine

Abstract

The utility model relates to the technical field of injection molding machines, in particular to a screw mechanism of an injection molding machine, which comprises an injection molding machine body, a driving motor is fixedly mounted on one side of the top of the injection molding machine body, the output end of the driving motor is fixedly connected with the screw mechanism through a coupler, and a screw is transversely arranged in the screw mechanism. A conveying blade is arranged on the outer surface of the screw rod, a discharging end is arranged at the tail end of the conveying blade, the outer surface of the screw rod mechanism is wrapped with a screw rod outer shell, a feeding hopper is arranged at the top of the side, away from the discharging end, of the screw rod outer shell, and a damping structure is arranged between the bottom of the screw rod mechanism and the top of the injection molding machine body. In the rotating process of the screw rod, vibration generated by high-speed rotation of the screw rod and flowing of a plastic material in the screw rod can be damped by utilizing the damping structure, so that the stability of the screw rod and even the whole injection molding machine during operation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a screw mechanism of an injection molding machine. Background Art

[0002] An injection molding machine is a machine used for plastic molding. It injects molten plastic material (usually thermoplastic) into a mold through an injection system. After cooling and solidification, the product is formed into the desired shape and size. An injection molding machine typically consists of an injection system, a mold clamping system, a hydraulic transmission system, an electrical control system, a lubrication system, a heating and cooling system, and safety devices. Injection molding machines are a crucial piece of equipment in the plastics processing industry, widely used in the production of various plastic products.

[0003] During the operation of an injection molding machine, the screw structure is one of the core components responsible for pushing the molten plastic material into the mold for molding. Due to the high-speed rotation of the screw, the flow of the plastic material within the screw, and the changes in the material's physical properties during heating and cooling, the screw structure does produce a certain degree of vibration during operation. These vibrations may affect the stability of the injection molding machine and the molding quality.

[0004] Therefore, it is necessary to design a screw mechanism of an injection molding machine to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of the present utility model is to provide a screw mechanism for an injection molding machine to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A screw mechanism of an injection molding machine includes an injection molding machine body, a drive motor is fixedly installed on one side of the top of the injection molding machine body, the output end of the drive motor is fixedly connected to the screw mechanism through a coupling, a screw is horizontally arranged inside the screw mechanism, the outer surface of the screw is provided with a conveying blade, the end of the conveying blade is provided with a discharge end, the outer surface of the screw mechanism is wrapped with a screw outer shell, a feed hopper is provided on the top of the side of the screw outer shell away from the discharge end, the outer surface of the screw mechanism is provided with a screw outer shell, an outer cover is fixedly installed on the outside of the screw outer shell, and a shock-absorbing structure is provided between the bottom of the screw mechanism and the top of the injection molding machine body.

[0008] As a preferred solution of the present invention, a plurality of fixed sleeves are fixedly installed on the outer surface of the screw outer shell, and guide grooves are provided at the bottom of both sides of the fixed sleeves. A plurality of guide blocks used in conjunction with the guide grooves are fixedly provided at the bottom of the screw outer shell, and the guide blocks are slidably connected to the inside of the guide grooves.

[0009] As a preferred solution of the present invention, a tail fixing sleeve is fixedly installed on the outside of the screw outer shell and on one side of the discharge end. The tail fixing sleeve is inserted into the tail support platform located on the outside below it. The tail support platform and the outer cover body are fixedly connected by bolts through a U-shaped mounting shell.

[0010] As a preferred solution of the present invention, a guide groove is also provided on the mounting shell, and a guide block is provided on one side of the outer cover body on the tail fixing sleeve for use with the guide groove, and the guide block is slidably connected to the guide groove.

[0011] As a preferred solution of the present invention, the shock-absorbing structure includes an upper elastic sheet and a lower elastic sheet arranged between the screw mechanism and the top of the injection molding machine body, an upper damping shock absorber is installed in the inner middle position of the upper elastic sheet, and a lower damping shock absorber is installed in the inner middle position of the lower elastic sheet.

[0012] As a preferred solution of the present invention, the tops of both left and right sides of the upper elastic piece are fixedly connected with fixed connecting plates, and the fixed connecting plates and the bottom shell of the screw mechanism are fixedly connected by bolts.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] In the utility model, a screw mechanism of an injection molding machine is set up. When the injection molding machine is used, the coupling is driven to rotate by the driving motor, and the screw and the conveying blades are synchronously driven to rotate, and the conveying blades are used to convey the injection molding material. During the rotation of the screw, the shock-absorbing structure can be used to absorb the vibration generated by its high-speed rotation and the flow of plastic material in the screw, thereby improving the stability of the screw and even the entire injection molding machine during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of a partial top view of the structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the exploded structure of the fixed sleeve and the screw outer shell of the utility model;

[0018] Figure 4 This is a schematic diagram of the exploded structure of the tail fixing sleeve, tail support platform and mounting shell of the utility model;

[0019] Figure 5 It is a three-dimensional structural schematic diagram of the shock-absorbing structure of the utility model.

[0020] In the figure: 1. Injection molding machine body; 2. Drive motor; 3. Screw mechanism; 31. Coupling; 4. Screw; 5. Conveying blade; 6. Discharge end; 8. Feed hopper; 9. Screw outer shell; 10. Outer cover; 11. Shock absorption structure; 111. Upper elastic sheet; 112. Lower elastic sheet; 113. Upper damping shock absorber; 114. Lower damping shock absorber; 115. Fixed connecting plate; 12. Fixed sleeve; 13. Guide groove; 14. Guide block; 15. Tail fixing sleeve; 16. Tail support platform; 17. Mounting shell. DETAILED DESCRIPTION

[0021] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. Several embodiments of the present invention are provided. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] For examples, see Figure 1-5 , the utility model provides a technical solution:

[0026] A screw mechanism of an injection molding machine includes an injection molding machine body 1, a drive motor 2 is fixedly installed on one side of the top of the injection molding machine body 1, the output end of the drive motor 2 is fixedly connected to the screw mechanism 3 through a coupling 31, a screw 4 is horizontally arranged inside the screw mechanism 3, the outer surface of the screw 4 is provided with a conveying blade 5, and the end of the conveying blade 5 is provided with a discharge end 6, the outer surface of the screw mechanism 3 is wrapped with a screw outer shell 9, a feed hopper 8 is provided at the top of the side of the screw outer shell 9 away from the discharge end 6, an outer cover 10 is fixedly installed on the outside of the screw outer shell 9, and a shock-absorbing structure 11 is provided between the bottom of the screw mechanism 3 and the top of the injection molding machine body 1.

[0027] Specifically, the outer surface of the screw shell 9 is sleeved with a plurality of fixed sleeves 12, and the bottom of both sides of the fixed sleeve 12 is provided with a guide groove 13. The bottom of the screw shell 9 is fixedly provided with a plurality of guide blocks 14 used in conjunction with the guide groove 13, and the guide blocks 14 are slidably connected to the inside of the guide groove 13; the outer side of the screw shell 9 and one side of the discharge end 6 is sleeved with a tail fixed sleeve 15, and the tail fixed sleeve 15 is inserted into the tail support platform 16 located on the outer side below it, and the tail support platform 16 and the outer cover body 10 are fixedly connected by bolts through a U-shaped mounting shell 17; the mounting shell 17 also has a guide Groove 13, a guide block 14 is provided on one side of the outer cover 10 on the tail fixing sleeve 15 for use with the guide groove 13, and the guide block 14 is slidably connected to the guide groove 13; the shock absorbing structure 11 includes an upper elastic sheet 111 and a lower elastic sheet 112 arranged between the screw mechanism 3 and the top of the injection molding machine body 1, an upper damping shock absorber 113 is installed in the middle position of the upper elastic sheet 111, and a lower damping shock absorber 114 is installed in the middle position of the lower elastic sheet 112; the tops of the left and right sides of the upper elastic sheet 111 are fixedly connected with fixed connecting plates 115, and the fixed connecting plates 115 and the bottom shell of the screw mechanism 3 are fixedly connected by bolts;

[0028] In this embodiment, the drive motor 2 drives the coupling 31 to rotate, synchronously driving the screw 4 and the conveying blade 5 to rotate, thereby using the conveying blade 5 to convey the injection molding material. During the screw's rotation, the damping material (such as rubber, silicone, etc.) within the upper and lower damping shock absorbers 113 and 114 activates due to the interference between the upper and lower elastic plates 111 and 112. These damping materials absorb and store impact forces or vibration energy, thereby reducing the vibration amplitude caused by the screw 4's rotation. Simultaneously, the spring structure within the upper and lower damping shock absorbers 113 and 114 also plays a key role. When subjected to external forces, the springs elastically deform, absorbing some of the vibration energy and further reducing the vibration amplitude during the screw 4's rotation. When the external force disappears, the springs return to their original shape, releasing the stored energy. However, due to the presence of the damping material, the rate of energy release is controlled, thereby avoiding secondary vibration caused by the rapid release of energy during the screw 4's rotation.

[0029] The working process of the present invention is as follows: when the screw mechanism of the injection molding machine is used, the coupling 31 is rotated by the driving motor 2, which synchronously drives the screw 4 and the conveying blade 5 to rotate, and then the conveying blade 5 is used to convey the injection molding material. During the rotation of the screw, the damping material (such as rubber, silicone, etc.) inside the upper damping shock absorber 113 and the lower damping shock absorber 114 will start to work due to the interference between the upper elastic sheet 111 and the lower elastic sheet 112. They will absorb and store impact force or vibration energy, thereby reducing the vibration amplitude caused by the rotation of the screw 4. At the same time, the spring structure in the upper damping shock absorber 113 and the lower damping shock absorber 114 also plays a key role. When subjected to external force, the spring will produce elastic deformation. This deformation can absorb some of the vibration energy, further reducing the vibration amplitude during the rotation of the screw 4. When the external force disappears, the spring will return to its original shape and release the stored energy. However, due to the presence of the damping material, the speed of energy release will be controlled, thereby avoiding secondary vibration caused by rapid energy release during the rotation of the screw 4.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screw mechanism of an injection molding machine, comprising an injection molding machine body (1), characterized in that: A driving motor (2) is fixedly mounted on one side of the top of the injection molding machine body (1), and the output end of the driving motor (2) is fixedly connected to a screw mechanism (3) via a coupling (31). A screw (4) is laterally arranged inside the screw mechanism (3), and a conveying blade (5) is arranged on the outer surface of the screw (4). A discharge end (6) is arranged at the end of the conveying blade (5). The outer surface of the screw mechanism (3) is wrapped with a screw outer shell (9), and a feed hopper (8) is arranged on the top of the side of the screw outer shell (9) away from the discharge end (6). An outer cover (10) is fixedly mounted on the outer side of the screw outer shell (9), and a shock-absorbing structure (11) is arranged between the bottom of the screw mechanism (3) and the top of the injection molding machine body (1).

2. The screw mechanism of an injection molding machine according to claim 1, characterized in that: The outer surface of the screw outer shell (9) is sleeved with a plurality of fixed sleeves (12), and the bottoms of both sides of the fixed sleeves (12) are provided with guide grooves (13). The bottom of the screw outer shell (9) is fixed with a plurality of guide blocks (14) used in conjunction with the guide grooves (13), and the guide blocks (14) are internally slidably connected to the guide grooves (13).

3. The screw mechanism of an injection molding machine according to claim 1, characterized in that: A tail fixing sleeve (15) is fixedly mounted on the outside of the screw outer shell (9) and located on one side of the discharge end (6). The tail fixing sleeve (15) is plugged into a tail support platform (16) located on the outside below the screw outer shell. The tail support platform (16) and the outer cover (10) are fixedly connected by bolts through a U-shaped mounting shell (17).

4. The screw mechanism of an injection molding machine according to claim 3, characterized in that: The mounting shell (17) is also provided with a guide groove (13), and a guide block (14) for use with the guide groove (13) is provided on one side of the tail fixing sleeve (15) located on the outer cover (10), and the guide block (14) and the guide groove (13) are slidably connected.

5. The screw mechanism of an injection molding machine according to claim 1, characterized in that: The shock absorbing structure (11) comprises an upper elastic sheet (111) and a lower elastic sheet (112) arranged between the screw mechanism (3) and the top of the injection molding machine body (1); an upper damping shock absorber (113) is installed in the middle position of the upper elastic sheet (111); and a lower damping shock absorber (114) is installed in the middle position of the lower elastic sheet (112).

6. The screw mechanism of an injection molding machine according to claim 5, characterized in that: The tops of both left and right sides of the upper elastic piece (111) are fixedly connected with fixed connecting plates (115), and the fixed connecting plates (115) and the bottom shell of the screw mechanism (3) are fixedly connected by bolts.

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