Multi-component injection molding machine

Abstract

The utility model discloses a multi-component injection molding machine, and relates to the technical field of plastic processing, the multi-component injection molding machine comprises a movable plate, a rotating shaft and a middle supporting oil cylinder, and the movable plate is used for bearing a mold; the rotating shaft is axially and movably arranged in the movable plate in a penetrating manner; the middle supporting oil cylinder is arranged on the movable plate, is connected with the rotating shaft and drives the rotating shaft to axially move; the middle supporting oil cylinder pushes the rotating shaft through the locking shaft, and a bearing is arranged at the joint of the locking shaft and the rotating shaft. According to the technical scheme, the middle supporting oil cylinder is used for providing power to move the rotating shaft, and the locking shaft transmits the force of the middle supporting oil cylinder to the rotating shaft; the bearing is arranged at the joint of the locking shaft and the rotating shaft, so that friction generated between the rotating shaft and the locking shaft is reduced, and stable movement of the rotating shaft is ensured.

Description

Technical Field

[0001] This application relates to the technical field of plastic processing, and particularly to a multi-component injection molding machine. Background Art

[0002] An injection molding machine is a key device in the plastic processing industry, and its performance and precision directly affect the quality of plastic products. With the growth of the demand for plastic products and the progress of technology, the design and manufacture of injection molding machines are constantly optimized and upgraded. Among them, the rotating shaft structure in the injection molding machine is an important part of the mold clamping mechanism. After the mold is closed, the mold clamping mechanism is used to provide sufficient force to maintain the closed state of the mold; when the driving part in the mold clamping structure drives the rotating shaft to rotate, the end of the rotating shaft is prone to friction with surrounding components, which may lead to damage to the rotating shaft. Summary of the Utility Model

[0003] The main purpose of this application is to propose a multi-component injection molding machine, aiming to solve the technical problem that the rotating shaft structure in the injection molding machine is prone to damage.

[0004] To achieve the above object, the multi-component injection molding machine proposed in this application includes:

[0005] A moving plate for carrying a mold;

[0006] A rotating shaft axially movably passing through the moving plate;

[0007] An intermediate support oil cylinder disposed on the moving plate, the intermediate support oil cylinder being connected to the rotating shaft and driving the axial displacement of the rotating shaft;

[0008] The intermediate support oil cylinder pushes the rotating shaft through a locking shaft, and a bearing is provided at the connection between the locking shaft and the rotating shaft.

[0009] In one embodiment, the bearing is a thrust cylindrical roller bearing.

[0010] In one embodiment, a lubricant is applied between the bearing and the rotating shaft.

[0011] In one embodiment, a connecting block is provided on the outer periphery of the connection between the locking shaft and the rotating shaft, the connecting block is connected to the rotating shaft, and a first gap is provided at the connection between the rotating shaft and the connecting block.

[0012] In one embodiment, the width of the first gap is between 1 mm and 5 mm.

[0013] In one embodiment, the bearing and the connecting block are spaced apart, and a second gap is formed between the bearing and the connecting block, and the width of the second gap is greater than the width of the first gap.

[0014] In one embodiment, the locking shaft is disposed through the push plate, and the middle support oil cylinder pushes the push plate to drive the locking shaft to move.

[0015] In one embodiment, a flow distribution shaft sleeve is disposed on the outer periphery of the rotating shaft, one end of the connecting block abuts against the push plate, and the other end of the connecting block abuts against the flow distribution shaft sleeve.

[0016] In one embodiment, a washer is disposed between the locking shaft and the push plate.

[0017] In one embodiment, the multi-component injection molding machine further includes a servo drive device. The servo drive device is disposed on the moving plate. The servo drive device is connected to the rotating shaft through a belt transmission mechanism, and the servo drive device drives the rotating shaft to rotate.

[0018] The technical solution of the present application utilizes the moving plate to carry the mold, the rotating shaft is axially movably disposed in the moving plate, the middle support oil cylinder is disposed on the moving plate, and the middle support oil cylinder is coupled to the rotating shaft and drives the axial displacement of the rotating shaft. The middle support oil cylinder pushes the rotating shaft through the locking shaft, and a bearing is disposed at the connection between the locking shaft and the rotating shaft. Among them, the middle support oil cylinder is used to provide power to move the rotating shaft, and the locking shaft transmits the force of the middle support oil cylinder to the rotating shaft; a bearing is disposed at the connection between the locking shaft and the rotating shaft to reduce the friction generated between the rotating shaft and the locking shaft and ensure the smooth movement of the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of an embodiment of the multi-component injection molding machine provided by the present application;

[0021] Figure 2 is Figure 1 a schematic cross-sectional structure diagram at A-A in

[0022] Figure 3 is Figure 2 a partial enlarged structural diagram at B in

[0023] Explanation of the reference numerals in the drawings:

[0024] 1. Moving plate; 2. Rotating shaft; 3. Middle support oil cylinder; 4. Locking shaft; 5. Connecting block; 6. First gap; 7. Push plate; 8. Flow distribution shaft sleeve; 9. Washer; 10. Servo drive device; 11. Bearing; 12. Second gap.

[0025] The realization of the purpose of this application, its functional features and advantages will be further described in conjunction with embodiments and with reference to the accompanying drawings. Specific Embodiments

[0026] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0027] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of this application, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of this application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0029] An injection molding machine is a key device in the plastic processing industry, and its performance and precision directly affect the quality of plastic products. With the growth of the demand for plastic products and the progress of technology, the design and manufacture of injection molding machines are constantly optimized and upgraded. Among them, the rotating shaft structure in an injection molding machine is an important part of the mold clamping mechanism. After the mold is closed, the mold clamping mechanism is used to provide sufficient force to keep the mold in a closed state; when the driving part in the mold clamping structure drives the rotating shaft to rotate, the end of the rotating shaft is prone to friction with surrounding components, thereby causing damage to the rotating shaft.

[0030] This application proposes a rotating shaft structure.

[0031] Please refer to Figures 1 to 3, in an embodiment of the present application, the multi-component injection molding machine includes a moving platen 1, a rotating shaft 2, and a center support oil cylinder 3. The moving platen 1 is used to carry the mold; the rotating shaft 2 axially passes through the moving platen 1 movably; the center support oil cylinder 3 is arranged on the moving platen 1, and the center support oil cylinder 3 is connected to the rotating shaft 2 and drives the rotating shaft 2 to axially displace; the center support oil cylinder 3 pushes the rotating shaft 2 through a locking shaft 4, and a bearing 11 is arranged at the connection between the locking shaft 4 and the rotating shaft 2.

[0032] By using the moving platen 1 to carry the mold, while the rotating shaft 2 axially passes through the moving platen 1 movably, and at the same time arranging the center support oil cylinder 3 on the moving platen 1. In addition, the center support oil cylinder 3 is connected to the rotating shaft 2 and drives the rotating shaft 2 to axially displace. The center support oil cylinder 3 pushes the rotating shaft 2 through a locking shaft 4, and a bearing 11 is arranged at the connection between the locking shaft 4 and the rotating shaft 2. Among them, the center support oil cylinder 3 is used to provide power to move the rotating shaft 2, and the locking shaft 4 transmits the force of the center support oil cylinder 3 to the rotating shaft 2; a bearing 11 is arranged at the connection between the locking shaft 4 and the rotating shaft 2 to reduce the friction generated between the rotating shaft 2 and the locking shaft 4 and ensure the smooth movement of the rotating shaft 2.

[0033] Among them, arranging a bearing 11 at the connection between the locking shaft 4 and the rotating shaft 2 ensures the rotational flexibility of the rotating shaft 2; the bearing 11 can provide precise axial and radial positioning for the rotating shaft 2 to ensure that the rotating shaft 2 rotates stably at a predetermined position, improve the connection stability of the rotating shaft 2, and at the same time maintain or optimize the rotational performance of the rotating shaft 2; when the rotating shaft 2 rotates, since the rotating shaft 2 is connected to the locking shaft 4 through the bearing 11, the direct contact between the end of the rotating shaft 2 and the locking shaft 4 can be avoided, which can not only prevent wear caused by the contact between the rotating shaft 2 and the locking shaft 4, but also enhance the connection stability between the rotating shaft 2 and the locking shaft 4, thereby improving the rotational stability of the rotating shaft 2. The bearing 11 and the locking shaft 4 are used to bear part of the load of the rotating shaft 2 to extend the service life of the rotating shaft 2.

[0034] In an embodiment, the bearing 11 is a thrust cylindrical roller bearing 11. The lubricated thrust cylindrical roller bearing 11 is mainly used to bear the load mainly in the axial direction. The lubricated thrust cylindrical roller bearing 11 is composed of separable seat rings, shaft rings, and rollers. Among them, the seat ring is connected to the locking shaft 4, and the shaft ring is matched with the rotating shaft 2; the lubricated thrust cylindrical roller bearing 11 realizes the lubrication purpose through oil lubrication or grease lubrication, and is used to reduce the friction between the rollers, seat rings, and raceways. Good lubrication can reduce the temperature, reduce wear, and extend the service life of the bearing 11.

[0035] In an embodiment, a lubricant is applied between the bearing 11 and the rotating shaft 2. The lubricant can form a thin film to reduce the direct contact between the rotating shaft 2 and the bearing 11, thereby reducing the friction coefficient, reducing wear, and extending the service life of the bearing 11 and the rotating shaft 2.

[0036] In one embodiment, a connecting block 5 is provided on the outer periphery of the connection between the locking shaft 4 and the rotating shaft 2. The connecting block 5 is connected to the rotating shaft 2. There is a gap at the connection between the rotating shaft 2 and the connecting block 5, and a first gap 6 is formed between the rotating shaft 2 and the connecting block 5 at the connection. The existence of the gap can reduce the direct contact between the rotating shaft 2 and the connecting block 5, thereby reducing the wear caused by friction. That is to say, there is a gap at the connection between the rotating shaft 2 and the connecting block 5, and a gap is formed between the rotating shaft 2 and the connecting block 5, which can prevent friction between the rotating rotating shaft 2 and the connecting block 5 from causing wear of the rotating shaft 2, and at the same time avoid the problem of yaw caused by wear at the end of the rotating shaft 2, improving the smoothness of the rotation of the rotating shaft 2.

[0037] In one embodiment, the width of the first gap 6 is between 1 mm and 5 mm. By controlling the width of the first gap 6 to be between 1 mm and 5 mm, it is ensured that there is enough space between the rotating shaft 2 and the connecting block 5 to avoid contact, and at the same time, the positioning accuracy of the rotating shaft 2 can be improved.

[0038] In one embodiment, the bearing 11 is spaced from the connecting block 5, and a second gap 12 is formed between the bearing 11 and the connecting block 5. The width of the second gap 12 is greater than the width of the first gap 6. Both the connecting block 5 and the rotating shaft 2 can provide positioning for the rotating shaft 2, improving the stability of the rotating shaft 2; the width of the second gap 12 is greater than the width of the first gap 6 to ensure that the connection between the rotating shaft 2 and the connecting block 5 has sufficient flexibility without sacrificing the structural stability and the rotating performance of the rotating shaft 2.

[0039] In one embodiment, the locking shaft 4 is disposed through the push plate 7, and the middle support oil cylinder 3 pushes the push plate 7 to drive the locking shaft 4 to move. The push plate 7 is connected to the locking shaft 4. The middle support oil cylinder 3 generates a thrust to push the push plate 7 to move, and then the locking shaft 4 moves along its axis. That is to say, mechanical transmission is realized through the thrust of the hydraulic cylinder, converting hydraulic energy into linear motion energy. In addition, the push plate 7 also plays a guiding role for the middle support oil cylinder 3, and can improve the pushing stability of the middle support oil cylinder 3 when the middle support oil cylinder 3 pushes the push plate 7 to drive the locking shaft 4 to move.

[0040] In one embodiment, a flow distribution bushing 8 is provided on the outer periphery of the rotating shaft 2. One end of the connecting block 5 abuts against the push plate 7, and the other end of the connecting block 5 abuts against the flow distribution bushing 8. The flow distribution bushing 8 is a component provided on the outer periphery of the rotating shaft 2 for guiding the flow of fluid to achieve functions such as lubrication and cooling. The connecting block 5 is used to connect the push plate 7 and the flow distribution bushing 8 together, which helps to improve the stability of the entire structure.

[0041] In one embodiment, a washer 9 is provided between the locking shaft 4 and the push plate 7. The washer 9 can be used to adjust the clearance between the locking shaft 4 and the push plate 7 to ensure the fitting accuracy and the smoothness of movement between the two; and the washer 9 can absorb the impact and vibration generated when the push plate 7 is pushed by the middle support oil cylinder 3, helping to more evenly distribute the pressure transmitted from the push plate 7 to the locking shaft 4 and reducing local stress concentration; and the washer 9 can serve as a wear protection layer to reduce the direct friction between the locking shaft 4 and the push plate 7 and extend the service life of both.

[0042] In one embodiment, the multi-component injection molding machine further includes a servo drive device 10. The servo drive device 10 is disposed on the moving platen 1. The servo drive device 10 is connected to the rotating shaft 2 through a belt drive mechanism, and the servo drive device 10 drives the rotating shaft 2 to rotate. The servo drive device 10 uses a servo motor. The servo drive device 10 is mounted on the moving platen 1, which helps to transmit the driving force to the rotating shaft 2 and reduce the loss during the transmission process. The belt drive can provide a smooth and quiet power transmission for the rotation of the rotating shaft 2, and at the same time allow a certain degree of elasticity to adapt to different loads and speed changes.

[0043] The technical solution of the present application utilizes the moving platen 1 to carry the mold, and the rotating shaft 2 axially passes through the moving platen 1 movably. At the same time, the middle support oil cylinder 3 is disposed on the moving platen 1. In addition, the middle support oil cylinder 3 is connected to the rotating shaft 2 and drives the rotating shaft 2 to axially displace. The middle support oil cylinder 3 pushes the rotating shaft 2 through the locking shaft 4, and a bearing 11 is provided at the connection between the locking shaft 4 and the rotating shaft 2. Among them, the middle support oil cylinder 3 is used to provide power to move the rotating shaft 2, and the locking shaft 4 transmits the force of the middle support oil cylinder 3 to the rotating shaft 2; a bearing 11 is provided at the connection between the locking shaft 4 and the rotating shaft 2 to reduce the friction generated between the rotating shaft 2 and the locking shaft 4 and ensure the smooth movement of the rotating shaft 2.

[0044] The above are only exemplary embodiments of the present application, and do not limit the patent scope of the present application. All equivalent structural transformations made under the technical concept of the present application by using the content of the specification and drawings of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A multi-component injection molding machine, characterized in that: include: A movable plate, used to carry the mold; A rotating shaft is axially movably disposed in the moving plate; A middle supporting oil cylinder is arranged on the movable plate, the middle supporting oil cylinder is connected to the rotating shaft and drives the rotating shaft to move axially; The center support oil cylinder pushes the rotating shaft through the locking shaft, and a bearing is provided at the connection between the locking shaft and the rotating shaft.

2. The multi-component injection molding machine according to claim 1, characterized in that: The bearing is a thrust cylindrical roller bearing.

3. The multi-component injection molding machine according to claim 2, characterized in that: Lubricant is applied between the bearing and the rotating shaft.

4. The multi-component injection molding machine according to claim 1, characterized in that: A connecting block is arranged at the periphery of the connection between the locking shaft and the rotating shaft, the connecting block is connected to the rotating shaft, and a first gap is arranged at the connection between the rotating shaft and the connecting block.

5. The multi-component injection molding machine according to claim 4, characterized in that: The width of the first gap is between 1 mm and 5 mm.

6. The multi-component injection molding machine according to claim 4, characterized in that: The bearing and the connecting block are spaced apart, and a second gap is formed between the bearing and the connecting block, and a width of the second gap is greater than a width of the first gap.

7. The multi-component injection molding machine according to claim 4, characterized in that: The locking shaft is disposed through the push plate, and the middle support oil cylinder pushes the push plate to drive the locking shaft to move.

8. The multi-component injection molding machine according to claim 7, characterized in that: A flow distribution sleeve is arranged on the outer periphery of the rotating shaft, one end of the connecting block abuts against the push plate, and the other end of the connecting block abuts against the flow distribution sleeve.

9. The multi-component injection molding machine according to claim 7, characterized in that: A washer is provided between the locking shaft and the push plate.

10. The multi-component injection molding machine according to claim 1, characterized in that: It also includes a servo drive device, which is arranged on the moving plate. The servo drive device is connected to the rotating shaft through a belt transmission mechanism, and the servo drive device drives the rotating shaft to rotate.

Images