Anti-toppling mechanism of rotating disc type multi-component injection molding machine

Abstract

The anti-toppling mechanism of the rotating disc type multi-component injection molding machine comprises a rotating disc and a rotating disc shaft in rigid connection with the rotating disc, an elastic piece is arranged on the periphery of the rotating disc shaft in the radial direction, one end of the elastic piece abuts against an adjusting supporting plate, and the adjusting supporting plate makes contact with the periphery of the rotating disc shaft; the other end of the elastic piece abuts against an adjusting guide rod, the adjusting guide rod is fixedly connected with an adjusting screw, and the adjusting screw is movably arranged on the fixing plate in a penetrating mode. The inclination degree of the turntable is prevented through the radially arranged elastic piece, and the elastic piece has a self-adaptive adjustment function in a certain range, so that the cost is reduced and the space installation requirement is reduced on the basis of ensuring the inclination prevention effect, and the turntable can be suitable for all models in large, medium and small sizes.

Description

Technical Field

[0001] The invention relates to the technical field of multi-component injection molding machines, in particular to an anti-dumping mechanism of a turntable type multi-component injection molding machine. Background Art

[0002] The turntable injection molding machine is the most widely used technology in multi-component injection molding machines. It is a special injection molding machine with double or multi-station operation. Its characteristic is that the mold clamping device adopts a turntable structure, and the mold and turntable rotate around the shaft to achieve the replacement of the mold cavity. The rotating template method (turntable type) can realize double injection molding or multi-injection molding simultaneously, with short production cycle and high efficiency. It is particularly suitable for the production of large-volume and multi-functional parts, and is widely used in industrial and civilian plastic products.

[0003] The turntable injection molding machine is mainly composed of a turntable, a moving platen and a turntable shaft. The turntable is rigidly connected to the turntable shaft and realizes relative rotational motion with the moving platen through rolling bearings.

[0004] Since the structure of the turntable carrying the mold is similar to a cantilever arm, the turntable will inevitably tilt after carrying the mold, especially when carrying heavy weight molds and high torque molds. The tilt of the turntable causes the following problems: 1. Scratches between the plastic moving plate and the turntable; 2. Unstable operation of the turntable; 3. Increased drive load, even causing heat and damage to the motor; 4. Reduced mold matching accuracy. It can be seen that the turntable's anti-tilt wear and improved load-bearing capacity design is very important for turntable injection molding machines.

[0005] In order to solve the above problems, different manufacturers have different solutions, such as installing a support device at the bottom of the turntable to balance the downward moment generated by the mold and turntable, or installing a wear-resistant sheet between the turntable and the moving platen, etc. Regardless of the method, there are currently problems such as high cost, high space requirements, inflexible layout, and not suitable for small machines. Summary of the invention

[0006] In order to solve the above-mentioned deficiencies in the prior art, the purpose of the present application is to provide an anti-dumping mechanism for a turntable multi-component injection molding machine, which can prevent dumping while reducing costs, simplifying the internal structure and reducing space requirements.

[0007] In order to achieve the above-mentioned purpose, the present invention is designed to prevent dumping of a turntable type multi-component injection molding machine, including a turntable and a turntable shaft rigidly connected to the turntable, the outer periphery of the turntable shaft is provided with a radially arranged elastic member, one end of the elastic member abuts against an adjustment support plate, the adjustment support plate contacts the outer periphery of the turntable shaft, the other end of the elastic member abuts against an adjustment guide rod, the adjustment guide rod is fixedly connected to an adjustment screw, and the adjustment screw is movably penetrated through a fixed plate.

[0008] Furthermore, a first arc-shaped concave surface is provided at one end of the adjustment support plate, and the first arc-shaped concave surface is matched with the outer circumference of the turntable shaft.

[0009] Furthermore, a lubricating bearing is provided between the first arc-shaped concave surface and the outer periphery of the turntable shaft.

[0010] Furthermore, the elastic member is a butterfly spring or a compression spring.

[0011] Furthermore, the elastic member is a rectangular spring.

[0012] Furthermore, a fastening screw is provided on the adjusting screw, and the fastening screw is fixedly connected to the adjusting guide rod.

[0013] Furthermore, it also includes an ejection device, which is a pair of ejection devices, and the pair of ejection devices are symmetrically arranged according to the turntable axis. The ejection device is provided with a latch device, and the latch device can approach or move away from the turntable axis. When the latch device approaches the turntable axis, the ejection device can drive the turntable axis to move axially through the latch device, and the turntable axis can rotate circumferentially.

[0014] Furthermore, the ejection device includes a first driving mechanism and an ejection guide plate, the first driving mechanism drives the ejection guide plate to move axially, and the latch device is fixed on the ejection guide plate.

[0015] Furthermore, the latch device includes a second driving mechanism and a latch, wherein the second driving mechanism is fixed on the ejection guide plate and can drive the latch to radially approach or move away from the turntable shaft.

[0016] Furthermore, a second arc-shaped concave surface is provided at one end of the latch pin close to the turntable shaft, and an annular groove is provided on the turntable shaft, and the annular groove is matched with the second arc-shaped concave surface.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the tilt of the turntable is prevented by radially arranged elastic parts, and the elastic parts have a certain range of adaptive adjustment function. On the basis of ensuring the anti-tilt effect, the cost is reduced, the space installation requirements are reduced, and it can be suitable for all large, medium and small models.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the partial structure of a turntable multi-component injection molding machine in one embodiment of the present application.

[0020] Figure 2 yes Figure 1 A partial enlarged view of middle A.

[0021] Figure 3 yes Figure 1 Front view of .

[0022] Figure 4 yes Figure 3 Cross-sectional view of EE.

[0023] Figure 5 yes Figure 4 Schematic diagram of the assembly between the adjusting support plate and the fixing plate.

[0024] Figure 6 yes Figure 3 Cross-sectional view of FF.

[0025] Figure 7 yes Figure 6 A partial enlarged view of B.

[0026] Figure 8 yes Figure 1 Partial three-dimensional assembly diagram of the ejector device and the latch device.

[0027] Fig. 9 It is an assembly diagram of the latch device and the ejection guide plate. DETAILED DESCRIPTION

[0028] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices, systems, equipment and methods consistent with some aspects of the present application.

[0029] Please refer to Figures 1 to 9 As shown, an anti-dumping mechanism of a turntable type multi-component injection molding machine includes a turntable and a turntable shaft 1 rigidly connected to the turntable. Figure 1 The middle turntable axis 1 can be seen on one side as the front side, and the turntable is located at Figure 1 The back side is shown in the figure, so it is not visible. The turntable and the movable template 2 can fit together, and the turntable shaft 1 is rotatably penetrated through the movable template 2. A rolling bearing 3 is provided between the movable template 2 and the turntable shaft 1. The assembly relationship and operation principle between the turntable, the turntable shaft 1 and the movable template 2 are the same as the prior art and will not be repeated here.

[0030] The outer periphery of the turntable shaft 1 is provided with a radially arranged elastic member, one end of the elastic member abuts against the adjustment support plate 4, the adjustment support plate 4 contacts the outer periphery of the turntable shaft 1, and the other end of the elastic member abuts against the adjustment guide rod 5, the adjustment guide rod 5 is fixedly connected to the adjustment screw 6, the adjustment screw 6 is movably inserted into the fixed plate 7, and the fixed plate 7 is fixedly arranged. One elastic member can be arranged on the same fixed plate 7, or multiple elastic members can be arranged. When there are multiple elastic members, the adjustment guide rod 5, the adjustment screw 6, etc. correspond to the elastic member one by one, and the adjustment support plate 4 is still one. Through the radially arranged elastic member, the elastic member has a good adaptive adjustment function, which can effectively prevent the tilt of the turntable, and only needs to be set by the elastic support plate 4, the elastic member, the adjustment guide rod 5 and the fixed plate 7 to achieve anti-dumping, without the need to set large components such as support devices, which greatly reduces the space installation requirements and reduces the cost, and can be applicable to all large, medium and small models.

[0031] In order to adapt it to various models, the screw 6 can be screwed out or screwed into the fixing plate 7 by a certain distance by adjusting the screw 6, so that the elastic member can be loosened or compressed by adjusting the guide rod 5 to better adjust the elastic force of the elastic member.

[0032] In order to better fix the adjusting screw 6 and the adjusting guide rod 5, a fastening screw 8 is passed through the adjusting screw 6, and the fastening screw 8 is fixedly connected to the adjusting guide rod 5, so that the adjusting screw 6, the fastening screw 8 and the adjusting guide rod 5 are fixedly connected.

[0033] The adjustment support plate 4 can also slide axially along the turntable shaft 1 or the adjustment guide rod 5, and its fixed position can be adjusted according to the force position of the turntable shaft 1 to better prevent the turntable from tilting.

[0034] When there is one fixed plate 7 and the corresponding adjustable support plate 4, the elastic member is generally arranged on the rear side of the turntable shaft 1, which is used to partially offset the roll moment of the turntable and the associated mold to ensure that the inclination of the turntable is within the control range. Of course, there can be multiple fixed plates 7 and the corresponding adjustable support plates 4. When there are multiple fixed plates 7, the fixed plates 7 and the adjustable support plates 4 can be evenly arranged on the outer periphery of the turntable shaft 1 and used in the same way as the fixed plate 7.

[0035] The first arc-shaped concave surface 9 is provided at one end of the adjustment support plate 4 close to the turntable shaft 1. The first arc-shaped concave surface 9 is adapted to the turntable shaft 1, and a lubricating bearing 10 is provided between the first arc-shaped concave surface 9 and the turntable shaft 1. The provision of the lubricating bearing 10 can ensure the smooth operation of the turntable shaft 1 and the turntable. In this embodiment, the lubricating bearing 10 is embedded in the first arc-shaped concave surface 9 of the adjustment support plate 4, and a steel-based or copper-based lubricating bearing is selected. The surface of the lubricating bearing 10 is paved with a lubricating layer or graphite particles, and can also be lubricated with oil liquid.

[0036] The elastic member can be a butterfly spring 11 or a strong compression spring, preferably a butterfly spring 11 or a rectangular spring in combination, which can ensure the compression force and deformation amount and has a certain degree of elastic self-adjustment function.

[0037] In order to better reduce the wear between the turntable and the movable template 2 when rotating and the parallelism between the turntable, the movable template 2 and the fixed template when closing the mold, the turntable type multi-component injection molding machine also includes an ejector device, which is a pair of ejectors, and the pair of ejectors are symmetrically arranged according to the turntable axis 1. A latch device is provided on the ejector device, and the latch device can approach or move away from the turntable axis 1. When the latch device approaches the turntable axis 1, the ejector device can drive the turntable axis 1 to move axially through the latch device. At this time, the turntable axis 1 can rotate circumferentially. When the ejector device drives the turntable to move a certain distance away from the movable template 2, the turntable and the movable template 2 are separated. The turntable rotates without friction with the movable template 2, thereby reducing the wear between the turntable and the movable template 2. Then the ejector device drives the turntable to move toward the movable template 2 until it embraces the movable template 2, thereby ensuring the parallelism of the turntable, the movable template 2 and the fixed template.

[0038] Specifically, the ejection device includes a first driving mechanism and an ejection guide plate 12, the ejection guide plate 12 is connected to the first driving mechanism, the first driving mechanism drives the ejection guide plate 12 to move axially, the first driving mechanism is preferably an oil cylinder 13 or an air cylinder, the driving shaft of the first driving mechanism is arranged parallel to the turntable shaft 1, in order to ensure the stable movement of the ejection guide plate 12, a plurality of axially arranged ejection guide rods 14 are penetrated on the ejection guide plate 12, and the ejection guide rods 14 are also arranged parallel to the turntable shaft 1, and the latch device includes a second driving mechanism and a latch 15, the second driving mechanism is connected to the latch 15 The second driving mechanism drives the latch 15 to radially approach or move away from the turntable shaft 1. The second driving mechanism is also preferably an oil cylinder 16 or an air cylinder. The second driving mechanism is fixed on the ejection guide plate 12, and the ejection guide plate 12 is provided with a limiting mechanism to effectively limit the movement of the latch 15. In this embodiment, the ejection guide plate 12 is provided with a guide groove 17 and a guide column 18, and the latch 15 is provided with a limiting hole 19. The latch 15 is slidably arranged in the guide groove 15, and the guide column 18 is penetrated in the limiting hole 19 to ensure that the latch 15 can radially approach or move away from the turntable shaft 1 within the set stroke.

[0039] A second arc-shaped concave surface 20 is provided at one end of the latch 15 close to the turntable shaft 1, and an annular groove 22 is provided on the turntable shaft 1. The annular groove 22 is adapted to the second arc-shaped concave surface 20. The annular groove 22 can be directly arranged on the turntable shaft 1, or it can be a combination of the top supporting back cover 21 and the turntable shaft 1.

[0040] When the second driving mechanism drives the latch 15 to approach the annular groove 22, a pair of latches 15 are inserted into the annular groove 22. At this time, the turntable shaft 1 can rotate circumferentially, and then the first driving mechanism drives the ejector guide plate 12 to move axially. The ejector guide plate 12 drives the turntable shaft 1 to move axially through the latch 15, thereby causing the turntable to move axially, so that the turntable and the movable template 2 are separated. Generally, the turntable shaft 1 can move axially by 1~3mm. The moving distance can be achieved by mechanical limit, or by controlling the time or stroke of the first driving mechanism. Then the turntable can be rotated and replaced. After feeding, the ejector guide plate 12 is driven back by the first driving mechanism to make the turntable and the movable template 2 embrace each other, so as to realize the positioning between the turntable and the movable template 2 and the fixed template, and then the mold is closed and locked. The use of the turntable multi-component injection molding machine is the same as the prior art, which will not be repeated here.

[0041] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. An anti-dumping mechanism for a turntable multi-component injection molding machine, comprising a turntable and a turntable shaft rigidly connected to the turntable, characterized in that: A radially arranged elastic member is provided on the outer periphery of the turntable shaft, one end of the elastic member abuts against an adjustment support plate, the adjustment support plate contacts the outer periphery of the turntable shaft, the other end of the elastic member abuts against an adjustment guide rod, the adjustment guide rod is fixedly connected to an adjustment screw, and the adjustment screw is movably inserted into a fixed plate.

2. The anti-dumping mechanism of the turntable multi-component injection molding machine according to claim 1, characterized in that: A first arc-shaped concave surface is provided at one end of the adjustment support plate, and the first arc-shaped concave surface is matched with the outer circumference of the turntable shaft.

3. The anti-dumping mechanism of the turntable multi-component injection molding machine according to claim 2, characterized in that: A lubricating bearing is provided between the first arc-shaped concave surface and the outer periphery of the turntable shaft.

4. The anti-dumping mechanism of the rotary table type multi-component injection molding machine according to claim 1, characterized in that: The elastic member is a butterfly spring or a compression spring.

5. The anti-dumping mechanism of the rotary table type multi-component injection molding machine according to claim 4, characterized in that: The elastic member is a rectangular spring.

6. The anti-dumping mechanism of the rotary table type multi-component injection molding machine according to claim 1, characterized in that: A fastening screw is passed through the adjusting screw, and the fastening screw is fixedly connected to the adjusting guide rod.

7. The anti-dumping mechanism of the rotary table type multi-component injection molding machine according to claim 1, characterized in that: It also includes an ejection device, which is a pair, and the pair of ejection devices are symmetrically arranged according to the turntable axis. The ejection device is provided with a latch device, and the latch device can approach or move away from the turntable axis. When the latch device approaches the turntable axis, the ejection device can drive the turntable axis to move axially through the latch device, and the turntable axis can rotate circumferentially.

8. The anti-dumping mechanism of the rotary table type multi-component injection molding machine according to claim 7, characterized in that: The ejection device comprises a first driving mechanism and an ejection guide plate, the first driving mechanism drives the ejection guide plate to move axially, and the latch device is fixed on the ejection guide plate.

9. The anti-dumping mechanism of the rotary table type multi-component injection molding machine according to claim 8, characterized in that: The latch device comprises a second driving mechanism and a latch, wherein the second driving mechanism is fixed on the ejection guide plate and can drive the latch radially close to or away from the turntable shaft.

10. The anti-dumping mechanism of the rotary table type multi-component injection molding machine according to claim 9, characterized in that: The latch is provided with a second arc-shaped concave surface at one end close to the turntable shaft, and an annular groove is provided on the turntable shaft, and the annular groove is matched with the second arc-shaped concave surface.

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