Lightweight structure of tail plate of injection molding machine

Abstract

The utility model relates to an injection molding machine tail plate lightweight structure which comprises a tail plate main body and rear connecting rod supporting seats symmetrically arranged on the upper side and the lower side of the tail plate main body, and first material reducing hole structures used for reducing the mass of the rear connecting rod supporting seats and reducing stress concentration are arranged on the inner side walls of the rear connecting rod supporting seats. By arranging the first material reducing hole structure, the weight of the tail plate can be reduced, and the rigidity strength of the tail plate can be improved.

Description

Technical Field

[0001] The utility model relates to the field of injection molding machines, in particular to a lightweight structure of a tail plate of an injection molding machine. Background Art

[0002] The tail plate of an injection molding machine is an important component located at the rear of the injection molding machine. Its function is to fix the mold and injection system and withstand the pressure during the injection molding process. Modern injection molding machine tail plates are usually made of heavy metals such as steel or aluminum alloy to ensure sufficient strength and rigidity.

[0003] Chinese utility model patent CN213890970U proposes a tailgate for an injection molding machine. The tailgate comprises a main body with a storage compartment inside. A connecting rod is fixedly mounted at the front end of the main body, and a hinge hole is defined at the front end of the connecting rod. When the tailgate is installed on the injection molding machine, the connecting rod is connected to the pull rod and the crankshaft connecting rod through the hinge hole. The pull rod and the crankshaft connecting rod apply a horizontal bending tension to the tailgate through the connecting rod. During the transmission of the tension, the tailgate main body is subjected to significant stress, which poses a risk of fracture. The structural stability of the tailgate is low, and this needs to be improved. Utility Model Content

[0004] In order to improve the structural stability of the tail plate, the utility model provides a lightweight structure of the tail plate of an injection molding machine.

[0005] The utility model provides a lightweight structure of the tail plate of an injection molding machine, which adopts the following technical solutions:

[0006] A lightweight structure of an injection molding machine tailgate includes a tailgate body and rear link support seats symmetrically arranged on the upper and lower sides of the tailgate body. The inner side wall of the rear link support seat is provided with a first material reduction hole structure for reducing the mass of the rear link support seat and reducing stress concentration.

[0007] By adopting the above technical solution, a first material-reducing hole structure is provided in the rear link support seat, thereby reducing the weight of the rear link support seat. Furthermore, after the first material-reducing hole structure is provided in the rear link support seat, the threshold at which the rear link support seat can deform is increased, and the stress on the rear link support seat can be released at the first material-reducing hole structure, thereby reducing the stress on the tailgate and making it less likely to break.

[0008] And because the clamping force drives the rear connecting rod support seat to bend toward the center direction away from the tail plate body, the outer wall of the rear connecting rod support seat is affected by stress factors to a greater extent, while the inner wall is affected by stress factors to a lesser extent. Therefore, it is more appropriate to open the first material reduction hole structure on the inner wall of the rear connecting rod support seat, which can reduce stress concentration.

[0009] Optionally, the first material reduction hole structure includes a first cavity, and the first cavity does not penetrate the rear connecting rod support seat.

[0010] Optionally, the width of the first cavity is 1 / 3 to 3 / 4 of the width of the rear link support seat, and the height of the first cavity is 1 / 3 to 2 / 3 of the height of the rear link support seat.

[0011] By adopting the above technical solution, a structural form of the first material reduction hole structure is specifically disclosed. The first material reduction hole structure is in the form of a single hole, and the area of ​​the first cavity is large, so that the rear link support seat can reduce a lot of mass, while improving the deformation capacity of the rear link support seat, and the rear link support seat can release stress.

[0012] Optionally, the material reduction hole structure includes at least two first cavities, the first cavities are spaced apart from the rear connecting rod support seat, and the first cavities do not penetrate the rear connecting rod support seat.

[0013] Optionally, reinforcing ribs are formed between adjacent first cavities to increase the structural strength of the rear link support seat.

[0014] By adopting the above technical solution, another structural form of the first material reduction hole structure is specifically disclosed. The first material reduction hole structure is in a porous form. The opening of multiple first cavities can reduce the mass of the rear connecting rod support seat, and reinforcing ribs can be formed between the first cavities, thereby improving the structural strength of the rear connecting rod support seat.

[0015] Optionally, the rear link support seat is provided with cast circular holes inside and outside for reducing weight and for discharging finishing coolant.

[0016] By adopting the above technical solution, the cast circular hole can be used to discharge the finishing coolant, and the use of materials is saved, and the weight of the tail plate is reduced.

[0017] Optionally, a support structure for supporting the rear link support seat is provided between the two rear link support seats.

[0018] By adopting this technical solution, the clamping force of the connecting rod on the upper and lower rear link support seats can easily cause the tailgate to bend as a whole, directly transferring stress to the tailgate body and causing it to break. By providing a support structure, the stress can be transferred to the surrounding areas of the tailgate body, thereby reducing the bending phenomenon and further alleviating stress concentration.

[0019] Optionally, the support structure includes a tailgate support column and a main support column; the tailgate support column is arranged at one end of the rear link support seat close to the tailgate body, and the main support column is arranged at one end of the rear link support seat away from the tailgate body; a third cavity is formed between the tailgate support column and the main support column.

[0020] By adopting the above technical solution, the structural form of the support structure is specifically disclosed, the support structure can reduce the stress concentration phenomenon, and the third cavity is opened in the support structure, which can reduce the weight of the support structure.

[0021] Optionally, the tailgate body, the rear link support seat and the tailgate support column are surrounded to form an accommodating cavity, and the tailgate body has a second material reduction hole structure at the bottom of the accommodating cavity for reducing the mass of the tailgate body and optimizing stress distribution.

[0022] Optionally, the second material reduction hole includes a circumferentially opened second cavity, the second cavity passes through the inner and outer surfaces of the tail plate body, and support ribs for improving the structural strength of the tail plate body are formed between adjacent second cavities.

[0023] By adopting the above technical solution, a local I-beam structure can be formed between the support ribs, the tailgate support column and the tailgate body. The stress applied to the upper and lower rear link support seats is transmitted to the base plate support column through the local I-beam structure, and then transmitted to the surrounding areas of the tailgate body, so that the stress is evenly distributed, thereby improving the rigidity and strength of the tailgate.

[0024] In summary, the present invention has at least one of the following beneficial technical effects:

[0025] 1. A lightweight structure for a tailgate of an injection molding machine. By providing a first material reduction hole structure on the inner side wall of a rear connecting rod support seat, the deformation capacity of the rear connecting rod support seat is increased. When the rear connecting rod support seat is subjected to the clamping force of the crankshaft connecting rod, the rear connecting rod support seat can release the stress, thereby reducing the stress on the tailgate and making the tailgate less likely to break.

[0026] 2. By providing a support structure, the support structure can transfer the stress on the rear link support seat to the surrounding area of ​​the tailgate body, thereby reducing the bending of the tailgate and further alleviating stress concentration;

[0027] 3. By opening the second material reduction hole structure, a local I-beam structure can be formed between the support ribs, the tail plate support column and the tail plate body, thereby optimizing the stress distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of a lightweight structure of an injection molding machine tail plate in Example 1 of the present application.

[0029] Figure 2 This is a cross-sectional view of a lightweight structure of an injection molding machine tail plate according to Example 1 of the present application.

[0030] Figure 3 It is a structural schematic diagram of a local I-beam structure of Example 1 of the present application.

[0031] Figure 4 This is a schematic diagram of the overall structure of a lightweight structure of an injection molding machine tail plate in Example 2 of the present application.

[0032] Explanation of the accompanying drawings: 1. Tail plate main body; 11. Circular through hole; 2. Rear connecting rod support seat; 21. Articulated seat; 3. Support structure; 31. Tail plate support column; 32. Main support column; 33. Third cavity; 34. Tail plate triangular bracket; 4. Accommodating cavity; 5. First material reduction hole structure; 51. First cavity; 52. Cast circular hole; 53. Reinforcement rib; 6. Second material reduction hole structure; 61. Second cavity; 62. Support rib. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-4 The utility model is described in further detail.

[0034] The embodiment of the utility model discloses a lightweight structure of a tail plate of an injection molding machine.

[0035] Example 1:

[0036] Reference Figure 1 A lightweight tailgate structure for an injection molding machine includes a tailgate body 1, a rear link support 2, and a support structure 3. The rear link support 2 is located at the upper and lower ends of the tailgate body 1. The support structure 3 connects the two rear link support 2 to provide support. The tailgate body 1, rear link support 2, and support structure 3 surround a square cavity 4 for accommodating the mold clamping mechanism.

[0037] The tailgate body 1 is a square plate with a circular through hole 11 at its center. When the tailgate body 1 is mounted on the injection molding machine, the tailgate body 1 is placed vertically, and the circular through hole 11 is used to install a driving member that drives the clamping mechanism.

[0038] There are two rear connecting rod support seats 2, which are symmetrically arranged at the upper and lower ends of the tailgate body 1 and are integrally connected to the tailgate body 1. A hinge seat 21 is provided on the rear connecting rod support seat 2, and the hinge seat 21 is used for hinged installation of the connecting rod of the clamping mechanism.

[0039] The support structure 3 is arranged between the two rear link support seats 2. In this embodiment, the support structure 3 includes a tailgate support column 31 and a main support column 32. The tailgate support column 31 and the main support column 32 are both rectangular long blocks. The tailgate support column 31 is arranged at one end of the rear link support seat 2 close to the tailgate body 1, and the tailgate support column 31 is integrated with the rear link support seat 2 and the tailgate body 1, so that the structural strength is better. The main support column 32 is arranged at one end of the rear link support seat 2 away from the tailgate body 1, and the main support column 32 is connected to the rear link support seat 2 as a whole. A third cavity 33 is formed between the tailgate support column 31 and the main support column 32, so that the weight of the tailgate is reduced without affecting the structural strength of the tailgate.

[0040] A tailgate triangular bracket 34 is provided on one side of the main support column 32 away from the tailgate support column 31. The tailgate triangular bracket 34 is used to bear the weight and pressure from the mold and other related components. In order to reduce the weight of the tailgate triangular bracket 34, a hole can also be opened on the tailgate triangular bracket 34.

[0041] The main support columns 32 and the tailgate support columns 31 can transfer stress to the periphery of the tailgate body 1 , thereby slowing down the bending of the tailgate and further alleviating stress concentration.

[0042] When the tail plate is installed on the injection molding machine, since the rear connecting rod support seat 2 is connected to the clamping mechanism, the connecting rod of the clamping mechanism exerts a bending tension on the rear connecting rod support seat 2 in the horizontal direction. The tail plate is subjected to large stress and is prone to breakage. Therefore, a first material reduction hole structure 5 is opened on the rear connecting rod support seat 2 and a second material reduction hole structure 6 is opened on the tail plate body 1.

[0043] Reference Figure 1 and Figure 2 Because the rear link support seat 2 tends to bend away from the center of the tailgate body 1 under the clamping force of the tie rod, the outer wall of the rear link support seat 2 is more affected by stress, while the inner wall is less affected by stress. Therefore, the inner wall of the rear link support seat 2 is notched to improve the deformation capacity of the rear link support seat 2, allowing the rear link support seat 2 to release the stress, thereby reducing the stress. In this embodiment, the first material reduction hole structure 5 includes a first cavity 51. The first cavity 51 is defined in the inner wall of the rear link support seat 2 and does not penetrate the outer wall of the rear link support seat 2.

[0044] In this embodiment, the width of the first cavity 51 is 1 / 3 to 3 / 4 of the width of the rear link support seat 2, and the height of the first cavity 51 is 1 / 3 to 2 / 3 of the height of the rear link support seat 2. Preferably, the width of the first cavity 51 is 2 / 3 of the width of the rear link support seat 2, and its height is 1 / 2 of the height of the rear link support seat 2, so that the weight of the rear link support seat 2 can be reduced as much as possible while ensuring the structural strength of the rear link support seat 2.

[0045] The rear link support 2 is further provided with a casting hole 52 in the first cavity 51, which penetrates the inner and outer surfaces of the rear link support 2. The casting hole 52 can further reduce the weight of the rear link support 2 and is used to discharge finishing coolant during tailgate casting.

[0046] Reference Figure 1 and Figure 3 The second material reduction hole structure 6 includes a second cavity 61, which is opened on the inner surface of the tailgate body 1 in the accommodating cavity 4. The second cavity 61 passes through the inner and outer surfaces of the tailgate body 1 and has a stepped structure.

[0047] In this embodiment, there are four second cavities 61, which are evenly distributed circumferentially around the circular through hole 11. Support ribs 62 are formed between adjacent second cavities 61. The support ribs 62, the tailgate body 1, and the tailgate support columns 31 form a partial I-beam structure.

[0048] The stress on the two rear link support seats 2 is transmitted to the tailgate support column 31 through the local I-beam structure, and then transmitted to the surrounding of the tailgate body 1, so that the stress distribution is uniform, thereby optimizing the stress distribution and further making the tailgate less likely to break.

[0049] Combine Figures 1 to 3 The implementation principle of the lightweight structure of the tailboard of an injection molding machine in an embodiment of the present invention is as follows: by opening a first cavity 51, a second cavity 61 and a third cavity 33 on the tailboard, the weight of the tailboard can be reduced, the stress concentration of the tailboard can be reduced, and the stress of the tailboard can be evenly distributed.

[0050] Example 2:

[0051] Compared with Example 1, the lightweight structure of the tail plate of an injection molding machine in Example 2 is the same as that in Example 1 except that the structure of the first material reduction hole structure 5 is different, and the rest of the structure is the same as that in Example 1, which will not be described in detail here.

[0052] Reference Figure 4 In this embodiment, the first material-reducing hole structure 5 includes multiple first cavities 51, which are spaced apart on the rear link support base 2 and do not penetrate the rear link support base 2. Reinforcing ribs 53 are formed between adjacent first cavities 51. This material-reducing hole structure can both reduce the weight of the rear link support base 2 and improve its structural strength.

[0053] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lightweight structure of a tailgate for an injection molding machine, comprising a tailgate body (1) and rear connecting rod support seats (2) symmetrically arranged on the upper and lower sides of the tailgate body (1), characterized in that: The inner side wall of the rear connecting rod support seat (2) is provided with a first material reduction hole structure (5) for reducing the mass of the rear connecting rod support seat (2) and reducing stress concentration; the first material reduction hole structure (5) includes a first cavity (51), and the first cavity (51) does not penetrate the rear connecting rod support seat (2).

2. The lightweight structure of the tailgate of an injection molding machine according to claim 1, characterized in that: The width of the first cavity (51) is 1 / 3 to 3 / 4 of the width of the rear link support seat (2), and the height of the first cavity (51) is 1 / 3 to 2 / 3 of the height of the rear link support seat (2).

3. The lightweight structure of the tailgate of an injection molding machine according to claim 1, characterized in that: The material reduction hole structure comprises at least two first cavities (51), wherein the first cavities (51) are spaced apart on the rear connecting rod support seat (2), and the first cavities (51) do not penetrate the rear connecting rod support seat (2).

4. The lightweight structure of the tailgate of an injection molding machine according to claim 3, characterized in that: Reinforcing ribs (53) for improving the structural strength of the rear connecting rod support seat (2) are formed between adjacent first cavities (51).

5. The lightweight structure of the tailgate of an injection molding machine according to claim 1, characterized in that: The rear connecting rod support seat (2) is provided with a casting circular hole (52) running through the inside and outside for reducing weight and discharging finishing coolant.

6. The lightweight structure of the tailgate of an injection molding machine according to claim 1, characterized in that: A support structure (3) for supporting the rear link support seat (2) is provided between the two rear link support seats (2).

7. The lightweight structure of the tailgate of an injection molding machine according to claim 6, characterized in that: The support structure (3) comprises a tailgate support column (31) and a main support column (32); the tailgate support column (31) is arranged at one end of the rear link support seat (2) close to the tailgate body (1), and the main support column (32) is arranged at one end of the rear link support seat (2) away from the tailgate body (1); a third cavity (33) is formed between the tailgate support column (31) and the main support column (32).

8. The lightweight structure of the tailgate of an injection molding machine according to claim 7, characterized in that: The tailgate body (1), the rear link support seat (2), and the tailgate support column (31) surround and form an accommodating cavity (4); the tailgate body (1) has a second material reduction hole structure (6) at the bottom of the accommodating cavity (4) for reducing the mass of the tailgate body (1) and optimizing stress distribution.

9. The lightweight structure of the tailgate of an injection molding machine according to claim 8, characterized in that: The second material reduction hole comprises a second cavity (61) opened in a circumferential direction, the second cavity (61) passes through the inner and outer surfaces of the tail plate body (1), and support ribs (62) for improving the structural strength of the tail plate body (1) are formed between adjacent second cavities (61).

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