Injection molding machine nozzle cleaning mechanism

Abstract

The utility model provides an injection molding machine nozzle cleaning mechanism, and belongs to the technical field of injection molding. The injection molding machine nozzle cleaning mechanism comprises a rotating rod and connecting rods, the two connecting rods are hinged to the inner end of the rotating rod in a Y shape, a scraping head is hinged to the front end of each connecting rod, the outer end of each scraping head is fixedly connected with an elastic rubber mat, and the two rubber mats are in sliding friction with each other. The cleaning device has the following effects that friction of the two rubber pads is utilized to help the fixed scraping head to be in a folded state, the scraping head can be conveniently inserted into the nozzle, then an electric hand drill and other small equipment are utilized to clamp the rotating rod and start to rotate, centrifugal force is utilized to throw the two connecting rods and the scraping head away to be attached to the inner wall of the nozzle to rotate, attachments are scraped away, and the cleaning effect is achieved; after rotation is stopped, the rotating rod is pulled out, the connecting rod can be automatically folded, the two scraping heads can be automatically straightened to the folded posture under damping of the rubber mat, pulling out is convenient, the structure is simple, and use is flexible.

Description

Technical Field

[0001] This application relates to the field of injection molding technology, and more specifically, to an injection molding machine nozzle cleaning mechanism. Background Technology

[0002] Injection molding machines are the main molding equipment used to make various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. After injection molding, the nozzles of injection molding machines will have some residue stuck to them. In order to facilitate better use of the injection molding machine in the future.

[0003] In response, Chinese patent application number CN202420358550.X discloses a cleaning mechanism for injection molding machine nozzles. This solution mainly involves setting a push rod motor in the groove at the front end of a fixed shaft, and setting a scraper on the telescopic end of the push rod motor. By extending the fixed shaft into the nozzle, the push rod motor pushes the scraper radially out. As the nozzle rotates, the scraper scrapes away residue from the inner wall of the nozzle, achieving a cleaning effect.

[0004] However, in the process of implementing the technical solutions in the embodiments of this application, the inventors of this utility model discovered that the above-mentioned technology has at least the following technical problems:

[0005] 1. Nozzles are usually quite small, making it difficult to install push rod motors and scrapers in small orifice diameters;

[0006] 2. Because the nozzle needs to rotate on its own, a special chuck, drive mechanism, and reciprocating screw are required, which takes up a large area, is costly, and is not flexible in use. Utility Model Content

[0007] To overcome the above deficiencies, this application provides an injection molding machine nozzle cleaning mechanism, which aims to improve the problems mentioned in the background art.

[0008] This application provides a nozzle cleaning mechanism for an injection molding machine, including a rotating rod and connecting rods. Two connecting rods are Y-shaped and hinged to the inner end of the rotating rod. Each connecting rod has a scraper head hinged to its front end, and each scraper head has an elastic rubber pad fixedly connected to its outer end. The two rubber pads slide and rub against each other.

[0009] In one specific implementation, the outer end of the rotating rod is provided with a triangular handle.

[0010] In the above implementation process, the triangular shank facilitates the clamping of tools such as electric drills, prevents slippage, and the drive structure is small in size, inexpensive, and flexible in use.

[0011] In one specific implementation, the front end of the rotating rod is provided with a rear step for limiting, and the rear end of the connecting rod abuts against the rear step.

[0012] In the above process, the rear step is used to limit the linkage, so that the linkage can only deflect out in the specified direction, ensuring that the scraper head can accurately scrape the inner wall of the nozzle.

[0013] In one specific implementation, the outer edge of the scraper head has an arc-shaped cutting edge.

[0014] In the above process, the arc-shaped cutting edge has an adaptive adjustment effect, and the large arc radius can better fit the inner wall of the nozzle and reduce residue.

[0015] In one specific implementation, a shoulder screw is screwed onto the scraper head, and the scraper head is rotatably connected to the shoulder screw.

[0016] In the above implementation process, the shoulder screw is used to hinge the scraper head to the connecting rod, and the shoulder screw can be removed to replace the scraper head.

[0017] In one specific implementation, the shoulder screw is located on the vertical line of the cutting edge.

[0018] In the above implementation process, the presence of the rubber pad causes the scraper head's center of gravity to shift. Therefore, the shoulder screw needs to be finely adjusted during the design process so that the center of gravity of the scraper head and the rubber pad as a whole and the extension line of the shoulder screw are located on the vertical line of the cutting edge. Alternatively, the quality of the rubber pad can be taken into account when designing the scraper head to ensure that the most convex part of the arc-shaped cutting edge can accurately fit against the inner wall of the nozzle after rotation.

[0019] In one specific implementation, the scraper head is provided with a front step for limiting, the front end of the connecting rod abuts against the front step, and the abutting position of the connecting rod is provided with an inclined surface.

[0020] In the above process, when the scraper head retracts, it rests against the front step, which serves as a limit to ensure that it passes through the nozzle accurately. When the scraper head approaches the front step, there may be debris on the contact surface, which may affect the contact. Therefore, an inclined surface is provided here to facilitate the discharge of debris. If the debris cannot be discharged in time, it will also accumulate in the triangular space between the inclined surface, the front step and another connecting rod, which will not affect the retraction of the scraper head.

[0021] In one specific implementation, the rubber pad abuts against the corresponding connecting rod.

[0022] In the above process, the rubber pad also plays a limiting role, which is used to limit the maximum deflection angle of the scraper head relative to the connecting rod, so as to prevent the scraper head from not returning to its accurate position when it is retracted.

[0023] Compared with the prior art, the beneficial effects of this application are: the friction of two rubber pads helps to fix the folded state of the scraper head, making it easy to insert into the nozzle. Then, a small device such as a hand drill is used to clamp the rotating rod and start rotating. Centrifugal force is used to throw the two connecting rods and their scraper heads apart and stick to the inner wall of the nozzle to rotate and scrape off the attached objects, achieving a cleaning effect. After stopping the rotation, the rotating rod is pulled out, and the connecting rods will automatically fold back. The two scraper heads will also automatically straighten to the folded position under the damping of the rubber pads, making them easy to pull out. The structure is simple and the use is flexible. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the injection molding machine nozzle cleaning mechanism in its deployed state according to an embodiment of this application;

[0026] Figure 2 A schematic diagram of the retracted state of the injection molding machine nozzle cleaning mechanism provided in the embodiments of this application;

[0027] Figure 3 A schematic diagram illustrating the connection relationship between the scraper head and the rotating rod provided for an embodiment of this application;

[0028] Figure 4 A schematic diagram illustrating the connection relationship between the connecting rod and the scraper head, provided for an embodiment of this application.

[0029] In the diagram: 10-Rotor; 11-Triangular shank; 12-Rear step; 20-Connecting rod; 21-Bevel; 30-Scraper head; 31-Cutting edge; 32-Shoulder screw; 33-Front step; 40-Rubber pad. Detailed Implementation

[0030] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0031] Please see Figures 1-4This application provides a nozzle cleaning mechanism for an injection molding machine, including a rotating rod 10 and connecting rods 20. Two connecting rods 20 are Y-shaped and hinged to the inner end of the rotating rod 10. Each connecting rod 20 has a scraper head 30 hinged to its front end, and each scraper head 30 has an elastic rubber pad 40 fixedly connected to its outer end. The two rubber pads 40 slide and rub against each other. The friction between the two rubber pads 40 helps to fix the scraper head 30 in a retracted state, facilitating its insertion into the nozzle. Then, a small device such as a hand drill is used to clamp the rotating rod 10 and begin rotation. Centrifugal force is used to fling the two connecting rods 20 and their scraper heads 30 against the inner wall of the nozzle, scraping away the deposits and achieving a cleaning effect. After rotation stops, the rotating rod 10 is pulled out, and the connecting rods 20 automatically retract. The two scraper heads 30 also automatically return to their retracted position under the damping of the rubber pads 40, facilitating removal. The structure is simple and the use is flexible.

[0032] Please see Figures 1-4 The outer end of the rotating rod 10 is provided with a triangular shank 11. The triangular shank 11 facilitates the clamping of tools such as electric drills, prevents slippage, and the drive structure is small in size, inexpensive, and flexible in use.

[0033] Please see Figures 1-4 The front end of the rotating rod 10 is provided with a limiting rear step 12, and the rear end of the connecting rod 20 abuts against the rear step 12. The rear step 12 is used to limit the connecting rod 20, so that the connecting rod 20 can only deflect out in a specified direction, ensuring that the scraper head 30 can accurately scrape the inner wall of the nozzle.

[0034] Please see Figures 1-4 The scraper head 30 has an arc-shaped cutting edge 31 on its outer edge. The arc-shaped cutting edge 31 has an adaptive adjustment effect, and the large arc radius can better fit the inner wall of the nozzle and reduce residue.

[0035] Please see Figures 1-4 The scraper head 30 is screwed with a shoulder screw 32, and the scraper head 30 is rotatably connected to the shoulder screw 32. The shoulder screw 32 is used to hinge the scraper head 30 to the connecting rod 20, and the shoulder screw 32 can be removed to replace the scraper head 30.

[0036] Please see Figures 1-4 The shoulder screw 32 is located on the vertical line of the cutting edge 31. Due to the presence of the rubber pad 40, the center of gravity of the scraper head 30 is offset. Therefore, the shoulder screw 32 needs to be finely adjusted in the design so that the center of gravity of the scraper head 30 and the rubber pad 40 as a whole and the extension line of the shoulder screw 32 are located on the vertical line of the cutting edge 31. Alternatively, the mass of the rubber pad 40 can be taken into account when designing the scraper head 30 to ensure that the most convex part of the arc-shaped cutting edge 31 can accurately fit against the inner wall of the nozzle after rotation.

[0037] Please see Figures 1-4The scraper head 30 is provided with a front step 33 for limiting the movement. The front end of the connecting rod 20 abuts against the front step 33, and the abutting position of the connecting rod 20 is provided with an inclined surface 21. When the scraper head 30 retracts, it abuts against the front step 33, which serves as a limit to ensure accurate passage through the nozzle. When the scraper head 30 approaches the front step 33, there may be debris on the contact surface, which may affect the contact. Therefore, the inclined surface 21 is provided here to facilitate the discharge of debris. If the debris cannot be discharged in time, it will also accumulate in the triangular space between the inclined surface 21, the front step 33 and the other connecting rod 20, without affecting the retraction of the scraper head 30.

[0038] Please see Figures 1-4 The rubber pad 40 abuts against the corresponding connecting rod 20. The rubber pad 40 also serves as a limiter here, used to limit the maximum deflection angle of the scraper head 30 relative to the connecting rod 20, to prevent the scraper head 30 from failing to return to its accurate position when retracting.

[0039] The working principle of the injection molding machine nozzle cleaning mechanism is as follows: During retraction, the two connecting rods 20 retract, the two scraper heads 30 abut against the connecting rods 20, and the two rubber pads 40 adhere to each other. Static friction is used to maintain the retracted state, facilitating insertion into the nozzle. Then, a small device such as a hand drill is used to clamp the triangular shank 11 and begin rotation. Centrifugal force is used to separate the two connecting rods 20 and the scraper heads 30. The scraper heads 30 unfold inside the nozzle and adhere to the inner wall to scrape away the deposits. The hand drill moves axially to clean the entire inner wall of the nozzle. After cleaning, the rotating rod 10 is pulled out. The connecting rods 20 automatically retract upon contact with the nozzle. When the two scraper heads 30 retract, the outer rubber pads 40 first contact and generate damping, thus... The scraper head 30 rotates and rests against the connecting rod 20, helping it to retract correctly. It can then be pulled out of the nozzle, which can either pour out the debris or suck it out using a vacuum. In summary, the friction of the two rubber pads 40 helps to fix the retracted state of the scraper head 30, making it easy to insert into the nozzle. Then, a small device such as a power drill is used to clamp the rotating rod 10 and start rotating it. Centrifugal force is used to throw the two connecting rods 20 and the scraper head 30 apart and make them fit against the inner wall of the nozzle to rotate, scraping away the attached material and achieving a cleaning effect. After stopping the rotation, the rotating rod 10 is pulled out, and the connecting rod 20 will automatically retract. The two scraper heads 30 will also automatically straighten to the retracted position under the damping of the rubber pads 40, making them easy to pull out. The structure is simple and the use is flexible.

[0040] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, improvements, or equivalent substitutions made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. A nozzle cleaning mechanism for an injection molding machine, characterized in that, It includes a rotating rod (10) and a connecting rod (20). The two connecting rods (20) are Y-shaped and hinged to the inner end of the rotating rod (10). Each connecting rod (20) has a scraper (30) hinged to its front end. Each scraper (30) has an elastic rubber pad (40) fixedly connected to its outer end. The two rubber pads (40) slide and rub against each other.

2. The injection molding machine nozzle cleaning mechanism according to claim 1, characterized in that, The outer end of the rotating rod (10) is provided with a triangular handle (11).

3. The injection molding machine nozzle cleaning mechanism according to claim 2, characterized in that, The front end of the rotating rod (10) is provided with a rear step (12) for limiting, and the rear end of the connecting rod (20) abuts against the rear step (12).

4. The injection molding machine nozzle cleaning mechanism according to claim 3, characterized in that, The outer edge of the scraper (30) is provided with an arc-shaped cutting edge (31).

5. The injection molding machine nozzle cleaning mechanism according to claim 4, characterized in that, A shoulder screw (32) is screwed onto the scraper head (30), and the scraper head (30) is rotatably connected to the shoulder screw (32).

6. The injection molding machine nozzle cleaning mechanism according to claim 5, characterized in that, The shoulder screw (32) is located on the vertical line of the cutting edge (31).

7. The injection molding machine nozzle cleaning mechanism according to claim 6, characterized in that, The scraper head (30) is provided with a front step (33) for limiting, and the front end of the connecting rod (20) abuts against the front step (33). The abutting position of the connecting rod (20) is provided with an inclined surface (21).

8. The injection molding machine nozzle cleaning mechanism according to claim 7, characterized in that, The rubber pad (40) abuts against the corresponding connecting rod (20).

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