Ejection balance rack assembly of injection mold

Abstract

The utility model discloses an ejection balance rack assembly of an injection mold. The ejection balance rack assembly comprises a bottom plate, a plurality of square seats arranged on the bottom plate at intervals, and an ejector plate movably arranged among the plurality of square seats, the two sides of the ejector plate are each provided with two racks, the side, close to the ejector plate, of each square base is provided with a gear balance mechanism, and the gear balance mechanisms are connected with the two racks in an engaged mode. According to the utility model, the ejector plate can be lifted at a uniform speed, so that the ejector pin can more stably and uniformly eject a product.

Description

Technical Field

[0001] The utility model relates to the technical field of mold ejection, in particular to an injection mold ejection balancing rack component. Background Art

[0002] In the prior art, mold ejection is generally carried out by the injection molding machine driving the ejector plate in the mold, and then the ejector plate drives the ejector pin to rise upward to eject the plastic product to achieve demolding. However, when ejecting products that are too long or too thin, the existing ejector structure has poor stability of the ejector plate and the ejector pin, which is not stable enough, and the ejection of each position of the product is uneven, which can easily lead to cracking, scratches, and deformation of the product. As the injection molding time increases, the temperature of the mold also increases. If the ejection speed is too fast or uneven, the ejector pin is prone to getting stuck or breaking. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an injection mold ejection balance rack assembly, which can allow the ejector plate to be lifted at a uniform rate, so that the ejector ejects the product more smoothly and evenly.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] An injection mold ejector balance rack assembly comprises a bottom plate, a plurality of square seats arranged at intervals on the bottom plate, and an ejector plate movably arranged between the plurality of square seats;

[0006] Two racks are arranged on both sides of the ejector plate, and a gear balancing mechanism is arranged on one side of each square seat close to the ejector plate, and the gear balancing mechanism is meshed and connected with the two racks.

[0007] Furthermore, the gear balancing mechanism includes two limit seats embedded in the square seat, a rotating shaft connecting rod rotatably connected between the two limit seats, and two gears assembled on the rotating shaft connecting rod and located in the two limit seats;

[0008] The two gears are meshed with two racks.

[0009] Furthermore, both ends of the rotating shaft connecting rod are rotatably mounted in two limit seats through bearings.

[0010] Furthermore, positioning grooves adapted for rack installation are provided on both sides of the ejector plate.

[0011] Furthermore, oil cylinders with output ends facing downwards are provided at both ends of the ejector plate, and the output shafts of the oil cylinders pass through the ejector plate and are connected to the bottom plate.

[0012] Furthermore, the output shaft at the bottom end of the oil cylinder is mounted on the base plate through an adapter.

[0013] Furthermore, the ejector plate is a split structure with upper and lower layers.

[0014] By adopting the above technical solution, the utility model has the following beneficial effects:

[0015] 1. The utility model adopts the design of the racks on both sides of the ejector plate and the gear balancing mechanism on the square seat, so that the ejector plate can rely on the meshing action of the racks and the gears of the gear balancing mechanism when lifting, so as to maintain the stability of lifting and lowering, and achieve a lifting effect at a uniform rate, so that the ejector can eject the product more smoothly and evenly, and it is not easy to damage the product. It is suitable for ejecting products that are too long or too thin; and the ejection rate is controllable, and there will be no sudden speed overshoot, which can protect the ejector from being stuck.

[0016] 2. Two racks are arranged on both sides of the ejector plate of the utility model, and the gear balancing mechanism is also designed with two gears meshing with the two racks. At the same time, the two gears are coaxially connected through a rotating shaft connecting rod, which can ensure that the rotation speed of the two gears is consistent, and then the movement speed of the two racks can be synchronized, so that the ejector plate can be lifted more smoothly and evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal coordination of an embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of the assembly of the rack and the ejector plate of the embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the assembly of the gear balancing mechanism of the embodiment of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the gear balancing mechanism of an embodiment of the utility model;

[0022] Figure 6 This is a diagram of the use state of an embodiment of the utility model;

[0023] Among them, 1. bottom plate; 2. square seat; 3. ejector plate; 30. positioning groove; 4. rack; 5. gear balancing mechanism; 50. limit seat; 51. shaft connecting rod; 52. gear; 53. bearing; 6. cylinder; 60. adapter; 7. mold frame; 8. ejector; 9. injection molded product. DETAILED DESCRIPTION

[0024] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0025] like Figure 1-6 As shown, in this embodiment, an injection mold ejector balance rack assembly is provided, which is mainly composed of a bottom plate 1, three square seats 2, two ejector plates 3 and other components. The three square seats 2 are arranged at intervals and fixed on the bottom plate 1, and the two ejector plates 3 are movably arranged between the three square seats 2. A cylinder 6 with an output end facing downward is also arranged at both ends of each ejector plate 3. The output shaft of the cylinder 6 passes through the ejector plate 3, and the output shaft at the bottom end of the cylinder 6 is installed on the bottom plate 1 through an adapter 60, that is, the housing of the cylinder 6 is fixed on the ejector plate 3. When the output shaft of the cylinder 6 extends downward, the ejector plate 3 can be driven to move upward through the housing of the cylinder 6.

[0026] refer to Figure 6 In this embodiment, when the ejector plate 3 is used, an ejector pin 8 is installed to lift the injection molded product 9, and a mold frame 7 is assembled on the square base 2 to form a normal mold structure. In order to better fix the ejector pin 8 and install the guide column, etc., the ejector plate 3 can specifically adopt a split structure with upper and lower layers.

[0027] In order to achieve uniform lifting of the ejector plate 3, two racks 4 are fixedly installed on both sides of each ejector plate 3 in this embodiment, and a gear balancing mechanism 5 is provided on one side of each square seat 2 close to the ejector plate 3, and the gear balancing mechanism 5 is meshed and connected with the two racks 4. In order to form a better positioning and stabilizing effect for the rack 4, positioning grooves 30 adapted for the installation of the rack 4 are provided on both sides of the ejector plate 3, and the rack 4 and the positioning groove 30 are convex, and the rack 4 is fixed by screws.

[0028] Specifically, each gear balancing mechanism 5 is composed of two limit seats 50 embedded in the square seat 2, a rotating shaft connecting rod 51 rotatably connected between the two limit seats 50, and two gears 52 assembled on the rotating shaft connecting rod 51 and located in the two limit seats 50. The two ends of the rotating shaft connecting rod 51 are rotatably installed in the two limit seats 50 through bearings 53. The two gears 52 are meshed with the two racks 4 on the same side.

[0029] With such a design, when the oil cylinder 6 drives the ejector plate 3 to lift up, the rack 4 moves upward with the ejector plate 3, and drives the gear 52 to rotate at the same time. Each ejector plate 3 can rely on the meshing of the four racks 4 on both sides with the corresponding gears 52 to maintain the stability of lifting and lowering, and achieve a lifting effect at a uniform rate, thereby making the ejector 8 eject the injection molded product 9 more stable and uniform, and not easy to damage the product, and can be used to eject products that are too long or too thin; and the rate of ejection is controllable, and there will be no sudden speed overshoot, which can protect the ejector 8 from being easily stuck. Of course, two racks 4 are set on both sides of the ejector plate 3, and the gear balancing mechanism 5 is also designed with two gears 52 meshing with the two racks 4. At the same time, the two gears 52 are coaxially connected through the rotating shaft connecting rod 51, which can ensure that the rotation speed of the two gears 52 is consistent, and then the movement speed synchronization of the two racks 4 can be ensured, making the ejector plate 3 more stable and uniform when lifting up.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] The above specific embodiments further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection mold ejector balance rack assembly, characterized in that: It comprises a bottom plate (1), a plurality of square seats (2) arranged at intervals on the bottom plate (1), and an ejector plate (3) movably arranged between the plurality of square seats (2); Two racks (4) are provided on both sides of the ejector plate (3), and a gear balancing mechanism (5) is provided on one side of each square seat (2) close to the ejector plate (3), wherein the gear balancing mechanism (5) is meshedly connected with the two racks (4).

2. The injection mold ejector balancing rack assembly according to claim 1, characterized in that: The gear balancing mechanism (5) comprises two limit seats (50) embedded in the square seat (2), a rotating shaft connecting rod (51) rotatably connected between the two limit seats (50), and two gears (52) mounted on the rotating shaft connecting rod (51) and located in the two limit seats (50); The two gears (52) are meshed with the two racks (4).

3. The injection mold ejector balancing rack assembly according to claim 2, characterized in that: Both ends of the rotating shaft connecting rod (51) are rotatably mounted in two limiting seats (50) via bearings (53).

4. The injection mold ejector balancing rack assembly according to claim 1, characterized in that: Positioning grooves (30) adapted for mounting the rack (4) are provided on both sides of the ejector plate (3).

5. The injection mold ejector balancing rack assembly according to claim 1, characterized in that: Oil cylinders (6) with output ends facing downwards are also provided at both ends of the ejector plate (3); the output shaft of the oil cylinder (6) passes through the ejector plate (3) and is connected to the bottom plate (1).

6. The injection mold ejector balancing rack assembly according to claim 5, characterized in that: The output shaft at the bottom end of the oil cylinder (6) is mounted on the base plate (1) via an adapter (60).

7. The injection mold ejector balance rack assembly according to claim 1, characterized in that: The ejector plate (3) is a split structure with two upper and lower layers.

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