An injection molding machine tie rod nut with balanced thread force

Abstract

The present invention discloses an injection molding machine tie rod nut with balanced thread force, which comprises a nut, wherein the angle between the outer side surface of the nut and the central axis of the nut is 0.1°-0.3°, a threaded tooth is arranged inside the nut, and the angle between the middle diameter of the threaded tooth and the central axis of the nut is 0.2°-0.3°, a fixing screw is arranged on the nut, and there are several fixing screws that are evenly distributed, and the fixing screw passes through the left end surface of the nut and is placed on the right side surface of the nut, and the fixing screw is threadedly connected with the nut, and a sealing layer 1 is arranged on the nut, and the sealing layer 1 is placed on the outer surface of the nut and fixedly connected with the entire outer surface of the nut. The beneficial effects of the present invention are: the connection force of the nut is more uniform, the nut can be protected, the service life of the nut is increased, and the purpose of being more environmentally friendly is achieved.

Description

Technical Field

[0001] The invention relates to the technical field related to injection molding machine parts, in particular to an injection molding machine tie rod nut with balanced force on thread teeth. Background Art

[0002] The traditional thread processing is to make the thread diameter parallel to the center line, so that the gap between each thread is theoretically the same after the tie rod and the tie rod nut are assembled. When the tie rod is stressed, the force on the thread decreases from left to right, and it is no longer stressed after the 10th thread. Therefore, the unbalanced force on the thread causes the first few threads on the left to deform and fail. The operating environment of the injection molding machine is bound to be higher in temperature, and the chemical substances such as plastics will also adhere to it, so that the exposed tie rod nuts will be more easily corroded. Over time, the service life will also decrease, which is very environmentally unfriendly.

[0003] The Chinese patent publication number is CN118528494A, and the authorization publication date is August 23, 2024. A plastic box production line disclosed includes a processing table, an injection molding machine and a manipulator. The processing table is equipped with an injection molding machine, the processing table is equipped with a manipulator, the processing table is equipped with a pressing mechanism and a rotating assembly, the pressing mechanism is equipped with a winding mechanism, the pressing mechanism includes a bearing plate and a top plate, the bearing plate and the top plate are both assembled on the processing table, and a cylinder is assembled between the bearing plate and the top plate. The output end of the cylinder is provided with a connecting plate, the connecting plate is provided with a connecting rod, the connecting plate is provided with an extension rod, the extension rod is equipped with an electric heating plate, and the electric heating plate is equipped with a hot stamping template. The winding mechanism includes a connecting frame, the connecting frame is provided on the connecting plate, the connecting frame is equipped with a rotating rod, the connecting frame is equipped with a servo motor, the rotating rod is equipped with a winding roller, the connecting frame is equipped with a guide rod, and the rotating assembly includes a stepping motor, the stepping motor is assembled on the processing table, the stepping motor is provided with a turntable, and the turntable is equipped with several pallets. The disadvantage of this invention is that the connection force of the nut is not uniform enough, which easily leads to the need for frequent replacement of the nut.

[0004] The Chinese patent publication number is CN221809544U, and the authorization publication date is October 8, 2024. A plastic cup injection molding machine for waste gas recycling includes: a base, a partition, an output pipe and a shell. The top of the base is fixedly installed with a shell, the base is fixedly installed with a partition, and the output pipe is fixedly installed on one side of the base. The suction device is fixedly installed inside the base, which is used to automatically absorb harmful gases inside the shell to facilitate subsequent purification. The purification device is fixedly installed on the side of the base away from the suction device. The purification device includes a base frame, a rotating plate, a fixing rod, a nut and a filter element. The base frame is symmetrically fixed on one side of the base. Compared with the traditional injection molding machine, the device can quickly and stably absorb and collect the harmful gases generated by the injection molding machine during injection molding, and then concentrate them into the filter element. Through the material and structure of the filter element itself, it fully reacts with the harmful part of the gas, thereby completing the purification of the gas and completing the rapid treatment of the waste gas. The shortcoming of this utility model is that it cannot protect the stressed nuts. Summary of the invention

[0005] The present invention aims to overcome the shortcomings of the prior art that the connection force of the nut is not uniform, the nut is not protected, which easily leads to the need for frequent replacement of the nut and is not environmentally friendly. The present invention provides an injection molding machine tie rod nut with more uniform connection force, which can protect the nut, increase the service life of the nut and is more environmentally friendly.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A tie rod nut for an injection molding machine with balanced thread force, comprising a nut, wherein the angle between the outer side surface of the nut and the central axis of the nut is 0.1°-0.3°, thread teeth are arranged inside the nut, the angle between the middle diameter of the thread teeth and the central axis of the nut is 0.2°-0.3°, a fixing screw is arranged on the nut, there are several fixing screws and they are evenly distributed, the fixing screw passes through the left end surface of the nut and is arranged on the right side surface of the nut, the fixing screw is threadedly connected to the nut, a sealing layer 1 is arranged on the nut, the sealing layer 1 is arranged on the outer surface of the nut and is fixedly connected to the entire outer surface of the nut.

[0007] When making it, first process the outer surface of the nut with one end larger than the other, and the angle between the end with the larger diameter of the nut and the central axis of the nut is 0.1°-0.3°. Then, turn the inner hole of the nut and fit the corresponding fixing screw. Then, use appropriate tools to process the thread teeth, and ensure that the angle between the middle diameter of the thread teeth and the central axis of the nut is 0.2°-0.3°. Finally, wrap a sealing layer on the outer surface of the nut to reduce oxidation of the nut and reduce dust and plastic particles in the air from adhering to the nut. When using it, install the nut on the pull rod, and then install the fixing screw through the nut. The nut is supported against the fixed template, so that after the tie rod and the nut are assembled, the thread tooth gap gradually increases from the end farthest from the fixed template to the end near the fixed template. When the tie rod is subjected to force, the deformation and extension of the tie rod also gradually increases from the end farthest from the fixed template to the end near the fixed template, which coincides with the change of the thread tooth gap. In addition, the reaction force of the fixed screw on the nut makes the force on each thread tooth tend to be balanced, which solves the problem of deformation and failure of the thread teeth due to uneven force, extends the service life of the tie rod and the nut, and achieves the purpose of more uniform connection force on the nut, protecting the nut, increasing the service life of the nut, and being more environmentally friendly.

[0008] Preferably, the nut is provided with a top block, and the top blocks are in plurality and evenly distributed on the right side of the nut and connected to the right side of the nut. The top blocks are convenient for leaving space between the nut and the fixed template, which is more labor-saving when replacing the nut next time.

[0009] Preferably, a plurality of threaded holes are provided on the side of the nut, and the threaded holes correspond to the fixing screws one by one. The fixing screws are placed on the right side of the nut after passing through the threaded holes, and the fixing screws are threadedly connected to the nut through the threaded holes. The corresponding threaded holes make it easier to connect the fixing screws to the nuts, and there is a reaction force.

[0010] Preferably, a spring is provided on the top block, one end of the spring is fixedly connected to the top block, and the other end of the spring is connected to the right side of the nut. The spring can increase the reaction force between the nut and the pull rod, and can also reduce the wear of the thread teeth.

[0011] Preferably, a mounting block is provided on the left end of the spring, the right end face of the mounting block is fixedly connected to the left end face of the spring, a plurality of mounting grooves are provided on the right side face of the nut, the mounting grooves correspond to the mounting blocks one by one, the mounting block is placed in the mounting groove, and the spring is fixedly connected to the nut through the cooperation of the mounting block and the mounting groove. The mounting block and the mounting groove facilitate the fixing of the spring, and the fixing is also more firm.

[0012] Preferably, a second sealing layer is provided on the top block, and the second sealing layer surrounds the outer surface of the top block and is fixedly connected to the outer surface of the top block. The second sealing layer is convenient for protecting the top block and reducing wear.

[0013] Preferably, a sealing layer 3 is provided on the outer surface of the fixing screw, and the sealing layer 3 is fixedly connected to the outer surface of the fixing screw. The sealing layer 3 conveniently protects the fixing screw from being easily oxidized.

[0014] Preferably, the material of the sealing layer 1 is polytetrafluoroethylene, which can reduce the oxidation of the nut, resist high temperature, and reduce the adsorption of plastic particles and dust.

[0015] Preferably, the material of the second sealing layer is polytetrafluoroethylene, which can make the top block resist high temperature and reduce the adsorption of plastic particles and dust.

[0016] Preferably, the material of the sealing layer three at the head of the fixed screw is polytetrafluoroethylene, and the sealing layer three at the thread of the fixed screw is electro-galvanized. The polytetrafluoroethylene at the head of the fixed screw is convenient to reduce the oxidation of the fixed screw, can resist high temperature and reduce the adsorption of plastic particles and dust, and the electro-galvanized can reduce oxidation while not hindering the threaded connection, and the production process is more mature.

[0017] The beneficial effects of the present invention are: the connection force of the nut is more uniform, the nut can be protected, the service life of the nut is increased, and the purpose of being more environmentally friendly is achieved; the top block allows space to be left between the nut and the fixed template, which is more labor-saving when replacing the nut next time; the corresponding threaded hole makes it more convenient to connect the fixed screw with the nut, and there is a reaction force; the spring can increase the reaction force between the nut and the pull rod, and can better reduce the wear of the thread teeth; the mounting block and the mounting groove are convenient for fixing the spring, and the fixation is also more firm; the second sealing layer is convenient for protecting the top block to reduce wear; the third sealing layer is convenient for protecting the fixed screw from oxidation; polytetrafluoroethylene can reduce the oxidation of the nut, can resist high temperature and reduce the adsorption of plastic particles and dust; polytetrafluoroethylene can make the top block resist high temperature and reduce the adsorption of plastic particles and dust; the polytetrafluoroethylene on the head of the fixed screw is convenient for reducing the oxidation of the fixed screw, can resist high temperature and reduce the adsorption of plastic particles and dust, and electrogalvanizing can reduce oxidation without hindering threaded connection, and the production process is more mature. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a cross-sectional view of the front view of the present invention; Figure 3 yes Figure 2 AA cross-section diagram; Figure 4 yes Figure 2 An enlarged view of detail B; Figure 5 yes Figure 3 An enlarged view of detail C; Figure 6It is a partial cross-sectional view of the connection between the thread teeth of the nut and the tie rod.

[0019] In the figure: 1. nut, 2. thread teeth, 3. fixing screw, 4. top block, 5. sealing layer 1, 6. threaded hole, 7. spring, 8. mounting block, 9. mounting groove, 10. sealing layer 2, 11. sealing layer 3. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, a tie rod nut for an injection molding machine with balanced thread force comprises a nut 1, wherein the angle between the outer side surface of the nut 1 and the central axis of the nut 1 is 0.1°-0.3°, thread teeth 2 are arranged inside the nut 1, and the angle between the middle diameter of the thread teeth 2 and the central axis of the nut 1 is 0.2°-0.3°, a fixing screw 3 is arranged on the nut 1, and there are several fixing screws 3 which are evenly distributed, the fixing screw 3 passes through the left end surface of the nut 1 and is arranged on the right side surface of the nut 1, the fixing screw 3 is threadedly connected to the nut 1, and a sealing layer 5 is arranged on the nut 1, and the sealing layer 5 is arranged on the outer surface of the nut 1 and is fixedly connected to the entire outer surface of the nut 1.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a top block 4 is provided on the nut 1 , and there are a plurality of top blocks 4 which are evenly distributed on the right side surface of the nut 1 and connected to the right side surface of the nut 1 .

[0023] like Figure 3 and Figure 5 As shown, a plurality of threaded holes 6 are provided on the side of the nut 1 , and the threaded holes 6 correspond to the fixing screws 3 one by one. The fixing screws 3 pass through the threaded holes 6 and are placed on the right side of the nut 1 . The fixing screws 3 are threadedly connected to the nut 1 through the threaded holes 6 .

[0024] like Figure 2 , Figure 3 and Figure 4 As shown, a spring 7 is provided on the top block 4 , one end of the spring 7 is fixedly connected to the top block 4 , and the other end of the spring 7 is connected to the right side surface of the nut 1 .

[0025] like Figure 2 and Figure 4As shown, a mounting block 8 is provided on the left end of the spring 7, and the right end face of the mounting block 8 is fixedly connected to the left end face of the spring 7. A plurality of mounting grooves 9 are provided on the right side face of the nut 1, and the mounting grooves 9 correspond one to one with the mounting block 8. The mounting block 8 is placed in the mounting groove 9, and the spring 7 is fixedly connected to the nut 1 through the cooperation of the mounting block 8 and the mounting groove 9.

[0026] like Figure 4 As shown, a second sealing layer 10 is provided on the top block 4 , and the second sealing layer 10 surrounds the outer surface of the top block 4 and is fixedly connected to the outer surface of the top block 4 .

[0027] like Figure 5 As shown, a sealing layer three 11 is provided on the outer surface of the fixing screw rod 3 , and the sealing layer three 11 is fixedly connected to the outer surface of the fixing screw rod 3 .

[0028] like Figure 5 As shown, the material of the sealing layer 1 5 is polytetrafluoroethylene.

[0029] like Figure 5 As shown, the material of the sealing layer 2 10 is polytetrafluoroethylene.

[0030] like Figure 4 As shown, the material of the sealing layer 3 11 located at the head of the fixing screw 3 is polytetrafluoroethylene, and the material of the sealing layer 3 11 located at the thread of the fixing screw 3 is electro-galvanized.

[0031] During production, the outer surface of the nut 1 is first processed with one end larger than the other end, and the angle between the end with the larger diameter of the nut 1 and the central axis of the nut 1 is 0.1°-0.3°. Then the inner hole, mounting groove 9 and threaded hole 6 of the nut 1 are machined, and the corresponding fixed screw 3 and the mounting block 8 with the top block 4 and the spring 7 are adapted. The outer surface of the top block 4 must have a sealing layer 2 10 made of polytetrafluoroethylene, and the head of the fixed screw 3 must have a sealing layer 3 11 made of polytetrafluoroethylene. The threaded tail of the fixed screw 3 is electro-galvanized, and then the thread teeth 2 are processed with suitable tools, and it is ensured that the angle between the middle diameter of the thread teeth 2 and the central axis of the nut 1 is 0.2°-0.3°. Finally, a layer of polytetrafluoroethylene is wrapped on the outer surface of the nut 1 as a sealing layer 1 5 to reduce oxidation of the nut 1 and reduce dust and plastic in the air. The particles are attached to the nut 1, and finally the mounting block 8 with the spring 7 and the top block 4 is installed and fixed in the mounting groove 9; when in use, the nut 1 is installed on the pull rod, and then the fixing screw 3 is installed and passed through the threaded hole 6 to support the fixed template. In this way, after the pull rod and the nut 1 are assembled, the gap between the thread teeth 2 gradually increases from the far fixed template end to the near fixed template end. When the pull rod is subjected to force, the deformation and extension of the pull rod also gradually increases from the far fixed template end to the near fixed template end, which coincides with the change in the gap between the thread teeth 2. In addition, the reaction force of the fixing screw 3 on the nut 1 makes the force on each thread tooth 2 tend to be balanced, which solves the problem of deformation and failure of the thread teeth 2 due to uneven force, prolongs the service life of the pull rod and the nut 1, and achieves the purpose of more uniform connection force on the nut, protecting the nut, increasing the service life of the nut, and being more environmentally friendly.

Claims

1. A tie rod nut for an injection molding machine with balanced thread force, characterized in that: The invention comprises a nut (1), wherein the angle between the outer side surface of the nut (1) and the central axis of the nut (1) is 0.1°-0.3°, the nut (1) is provided with thread teeth (2), the angle between the median diameter of the thread teeth (2) and the central axis of the nut (1) is 0.2°-0.3°, the nut (1) is provided with a fixing screw (3), the fixing screws (3) are in a plurality and are evenly distributed, the fixing screws (3) pass through the left end surface of the nut (1) and are arranged on the right side surface of the nut (1), the fixing screws (3) are threadedly connected to the nut (1), and the nut (1) is provided with a sealing layer 1 (5), the sealing layer 1 (5) is arranged on the outer surface of the nut (1) and is fixedly connected to the entire outer surface of the nut (1).

2. The tie rod nut for injection molding machine with balanced thread force according to claim 1, characterized in that: The nut (1) is provided with a top block (4), and the top blocks (4) are in plurality and evenly distributed on the right side surface of the nut (1) and connected to the right side surface of the nut (1).

3. The tie rod nut for injection molding machine with balanced thread force according to claim 1, characterized in that: A plurality of threaded holes (6) are provided on the side surface of the nut (1), the threaded holes (6) corresponding to the fixing screws (3) one by one, the fixing screws (3) passing through the threaded holes (6) and then being arranged on the right side surface of the nut (1), and the fixing screws (3) being threadedly connected to the nut (1) through the threaded holes (6).

4. The tie rod nut for injection molding machine with balanced thread force according to claim 2, characterized in that: A spring (7) is provided on the top block (4), one end of the spring (7) is fixedly connected to the top block (4), and the other end of the spring (7) is connected to the right side surface of the nut (1).

5. The tie rod nut for injection molding machine with balanced thread force according to claim 4, characterized in that: A mounting block (8) is provided on the left end of the spring (7), and the right end surface of the mounting block (8) is fixedly connected to the left end surface of the spring (7). A plurality of mounting grooves (9) are provided on the right side surface of the nut (1), and the mounting grooves (9) correspond to the mounting blocks (8) one by one. The mounting block (8) is placed in the mounting groove (9), and the spring (7) is fixedly connected to the nut (1) through the cooperation between the mounting block (8) and the mounting groove (9).

6. The tie rod nut for injection molding machine with balanced thread force according to claim 4, characterized in that: A second sealing layer (10) is provided on the top block (4); the second sealing layer (10) surrounds the outer surface of the top block (4) and is fixedly connected to the outer surface of the top block (4).

7. The tie rod nut for injection molding machine with balanced thread force according to claim 3, characterized in that: A sealing layer three (11) is provided on the outer surface of the fixing screw rod (3), and the sealing layer three (11) is fixedly connected to the outer surface of the fixing screw rod (3).

8. The tie rod nut for injection molding machine with balanced thread force according to claim 1, characterized in that: The material of the sealing layer 1 (5) is polytetrafluoroethylene.

9. The tie rod nut for injection molding machine with balanced thread force according to claim 6, characterized in that: The material of the second sealing layer (10) is polytetrafluoroethylene.

10. The tie rod nut for injection molding machine with balanced thread force according to claim 7, characterized in that: The material of the sealing layer three (11) located at the head of the fixing screw (3) is polytetrafluoroethylene, and the material of the sealing layer three (11) located at the thread of the fixing screw (3) is electro-galvanized.

Images