Fixed mold plate structure of injection molding machine and injection molding machine

Abstract

The utility model discloses a fixed mold plate structure of an injection molding machine and the injection molding machine, and relates to the technical field of injection molding equipment. The fixed mold plate structure of the injection molding machine comprises a mold connecting plate, a middle plate and a pull rod connecting plate which are sequentially arranged in the thickness direction of the fixed mold plate structure, wherein the mold connecting plate and the pull rod connecting plate are arranged on the two sides of the middle plate; the guide pillar bosses are arranged at four corners of the fixed mold plate structure, and the guide pillar bosses are connected with the middle plate and the pull rod connecting plate; the first reinforcing rib assembly is located between the middle plate and the pull rod connecting plate; and the second reinforcing rib assembly is located between the middle plate and the mold connecting plate, and the projections of the first reinforcing rib assembly and the second reinforcing rib assembly in the thickness direction of the fixed mold plate structure are mutually overlapped. According to the technical scheme provided by the utility model, the fixed mold plate structure can realize that the mold mounting surface has low deformation and can reduce the unbalance loading risk caused by stress of the pull rod.

Description

Technical Field

[0001] This utility model relates to the field of injection molding equipment technology, and in particular to a fixed template structure for an injection molding machine and an injection molding machine. Background Technology

[0002] The fixed platen is a crucial component in the mold clamping mechanism of an injection molding machine, serving as a positioning reference for fixing the mold and guiding the movement of the tie rods. Under the action of the clamping force, the fixed platen is simultaneously subjected to the force transmitted from the center of the mold and the force generated by the deformation of the four tie rods (as shown in the attached figure). Figure 1 As shown, because the deformation force of the tie rod acts on the contact surface of the tie rod nuts located at the four corners of the fixed template, part of its force is not transmitted to the center of the fixed template, but to the four corners, resulting in bending deformation of the mold mounting surface of the fixed template. The amount of deformation of the fixed template directly affects the quality of product molding. Therefore, the fixed template is required to have sufficient rigidity and the lowest possible amount of deformation.

[0003] Currently, the industry designs the template with a structure where the four corners of the mold mounting surface are separated from the contact surface of the tie rod nut, such as... Figure 2 As shown in the left figure, by creating a cavity in the center of the guide post boss that guides the movement of the tie rod in the fixed mold platen, the four corners of the mold mounting surface are separated from the contact surface of the tie rod nut. This reduces the transmission of stress deformation from the tie rod nut contact surface to the mold mounting surface, effectively reducing the deformation of the mold mounting surface and allowing the force to be transmitted to the center to form a centrally stressed structure. However, while this structure improves the deformation and stress distribution of the fixed mold platen, it also introduces secondary problems. For example... Figure 2 As shown in the right figure, during the operation of the injection molding machine, due to the large difference in deformation between the two fixed ends of the guide post boss, specifically the deformation at the mold mounting surface end is much smaller than the deformation at the tie rod nut contact surface end, which in turn increases the risk of uneven load on the tie rod and greatly shortens the service life of the tie rod.

[0004] For the reasons mentioned above, there is an urgent need for a mold mounting surface structure with low deformation and that can reduce the risk of uneven load on the tie rod, which is beneficial for improving the product quality of injection molding machines and extending the service life of injection molding machines.

[0005] It should be noted that the above content is only used to help understand the technical solution of this utility model, and does not represent an admission that the above content is prior art. Utility Model Content

[0006] The main purpose of this utility model is to propose a fixed template structure for an injection molding machine and an injection molding machine in general. The goal is to achieve a fixed template structure with low deformation of the mold mounting surface and to reduce the risk of uneven load on the tie rod, thereby improving the product quality of the injection molding machine and extending the service life of the injection molding machine.

[0007] To achieve the above objectives, this utility model proposes a fixed template structure for an injection molding machine, which is provided with an injection nozzle mounting hole; specifically, the fixed template structure includes a mold connecting plate, a middle plate, and a tie rod connecting plate arranged sequentially along its thickness direction, and the mold connecting plate and the tie rod connecting plate are disposed on both sides of the middle plate;

[0008] Guide post bosses are provided at the four corners of the fixed template structure, and the guide post bosses are connected to the middle plate and the tie rod connecting plate;

[0009] The first reinforcing rib assembly is located between the middle plate and the tie rod connecting plate;

[0010] The second reinforcing rib assembly is located between the middle plate and the mold connecting plate, and the projections of the first reinforcing rib assembly and the second reinforcing rib assembly along the thickness direction of the fixed template structure overlap each other.

[0011] In one embodiment, the first reinforcing rib assembly and / or the second reinforcing rib assembly are in a star shape.

[0012] In one embodiment, the first reinforcing rib assembly includes a first horizontal vertical rib and a first diagonal rib, and the second reinforcing rib assembly includes a second horizontal vertical rib and a second diagonal rib. The first reinforcing rib assembly and the second reinforcing rib assembly are connected at their middle portions by an annular boss.

[0013] In one embodiment, the ends of the first horizontal vertical rib and the second horizontal vertical rib away from the annular boss extend to the edge of the middle plate; and / or, the ends of the first diagonal rib and the second diagonal rib away from the annular boss extend toward the guide post boss.

[0014] In one embodiment, the length of the first diagonal brace is longer than the length of the second diagonal brace.

[0015] In one embodiment, the end of the first diagonal rib away from the annular boss is connected to the guide post boss.

[0016] In one embodiment, the four corners of the mold connecting plate are recessed to form a clearance area, and the clearance area does not overlap with the projection of the guide post boss along the thickness direction of the fixed template structure.

[0017] In one embodiment, the bottom of the fixed template structure is symmetrically provided with standing feet, which are connected to the middle plate and the tie rod connecting plate, or the standing feet are connected to the mold connecting plate, the middle plate and the tie rod connecting plate.

[0018] In one embodiment, the fixed template structure is integrally injection molded.

[0019] To achieve the above objectives, this utility model proposes an injection molding machine, which includes a fixed mold plate structure as described in any of the above claims.

[0020] The technical solution of this utility model designs the fixed template structure as a three-layer structure, consisting of a mold connecting plate, a middle plate, and a tie rod connecting plate along the thickness direction of the fixed template structure. The side of the mold connecting plate furthest from the middle plate is the mold mounting surface, and the side of the tie rod connecting plate furthest from the middle plate is the tie rod nut contact surface. A first reinforcing rib assembly and a second reinforcing rib assembly are respectively provided between the middle plate and the tie rod connecting plate, and between the middle plate and the mold connecting plate. These first and second reinforcing rib assemblies connect the mold connecting plate, the middle plate, and the tie rod connecting plate into a single unit. The guide post boss, which guides the movement of the tie rod, is connected only to the middle plate and the tie rod connecting plate, not to the mold connecting plate. This allows the force acting on the tie rod nut contact surface to be transmitted to the center of the mold connecting plate through the first and second reinforcing rib assemblies, creating a centrally stressed mold mounting surface. Simultaneously, the projections of the first and second reinforcing rib assemblies along the thickness direction of the fixed template structure overlap, thus ensuring force transmission. In addition, the transition effect of the middle plate transfers most of the deformation of the tie rod connecting plate to the middle plate, reducing the impact of the stress deformation of the tie rod connecting plate on the deformation of the mold connecting plate, thereby reducing the deformation of the mold connecting plate and enabling the mold mounting surface to achieve ultra-low deformation.

[0021] In addition, the middle plate provides certain support for the guide post boss, which makes the stacked structure formed by the middle plate, the first reinforcing rib assembly and the tie rod connecting plate have sufficient rigidity, ensuring the overall strength of the stacked structure. This effectively reduces the difference in deformation between the two fixed ends of the guide post boss, thereby reducing the risk of the tie rod being overloaded, and thus achieving the goal of improving the product quality of the injection molding machine and extending the service life of the injection molding machine. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural schematic diagram and a stress-deformation diagram of a template in the background art;

[0024] Figure 2 The second part is a structural schematic diagram of a template in the background technology and its stress and deformation diagram.

[0025] Figure 3A schematic diagram of one embodiment of the injection molding machine fixed template structure provided by this utility model;

[0026] Figure 4 A second schematic diagram of an embodiment of the injection molding machine fixed template structure provided by this utility model;

[0027] Figure 5 This is a side view of an embodiment of the injection molding machine fixed template structure provided by this utility model;

[0028] Figure 6 for Figure 5 Sectional view of the cross section at point AA;

[0029] Figure 7 for Figure 5 Sectional view of the cross section at point BB.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Mold connecting plate; 101. Clearance area; 2. Middle plate; 3. Tie rod connecting plate; 4. Guide pillar boss; 5. First reinforcing rib assembly; 501. First horizontal and vertical rib; 502. First diagonal rib; 6. Second reinforcing rib assembly; 601. Second horizontal and vertical rib; 602. Second diagonal rib; 7. Injection nozzle mounting hole; 8. Standing foot; 9. Annular boss;

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0034] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, it should be noted that the descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0036] To solve the above-mentioned technical problems, this utility model proposes a fixed template structure for injection molding machines.

[0037] Please see Figure 3-7 In one embodiment of the present invention, the fixed template structure of the injection molding machine is provided with an injection nozzle mounting hole 7; it also includes a mold connecting plate 1, a middle plate 2 and a tie rod connecting plate 3 arranged sequentially along its thickness direction, with the mold connecting plate 1 and the tie rod connecting plate 3 disposed on both sides of the middle plate 2;

[0038] The guide post boss 4 is set at the four corners of the fixed template structure. The guide post boss 4 is connected to the middle plate 2 and the tie rod connecting plate 3.

[0039] The first reinforcing rib assembly 5 is located between the middle plate 2 and the tie rod connecting plate 3;

[0040] The second reinforcing rib assembly 6 is located between the middle plate 2 and the mold connecting plate 1, and the projections of the first reinforcing rib assembly 5 and the second reinforcing rib assembly 6 along the thickness direction of the fixed template structure overlap each other.

[0041] The technical solution of this utility model designs the fixed template structure as a three-layer structure, consisting of a mold connecting plate 1, a middle plate 2, and a tie rod connecting plate 3 along the thickness direction of the fixed template structure. The side of the mold connecting plate 1 away from the middle plate 2 is the mold mounting surface, and the side of the tie rod connecting plate 3 away from the middle plate 2 is the tie rod nut contact surface. A first reinforcing rib assembly 5 and a second reinforcing rib assembly 6 are respectively provided between the middle plate 2 and the tie rod connecting plate 3, and between the middle plate 2 and the mold connecting plate 1. These first and second reinforcing rib assemblies connect the mold connecting plate 1, the middle plate 2, and the tie rod connecting plate 3 into a single unit. The guide post boss 4, which guides the movement of the tie rod, is connected only to the middle plate 2 and the tie rod connecting plate 3, not to the mold connecting plate 1. This allows the force acting on the tie rod nut contact surface to be transmitted to the center of the mold connecting plate 1 through the first and second reinforcing rib assemblies 5 and 6, creating a centrally stressed mold mounting surface. Simultaneously, the projections of the first and second reinforcing rib assemblies 5 and 6 along the thickness direction of the fixed template structure overlap, ensuring force transmission. In addition, the deformation of the tie rod connecting plate 3 is mostly transferred to the middle plate 2 through the transition effect of the middle plate 2, which reduces the influence of the stress deformation of the tie rod connecting plate 3 on the deformation of the mold connecting plate 1, thereby reducing the deformation of the mold connecting plate 1 and making the mold mounting surface reach an ultra-low deformation.

[0042] In addition, the middle plate 2 provides a certain support for the guide post boss 4, so that the stacked structure formed by the middle plate 2, the first reinforcing rib assembly 5 and the tie rod connecting plate 3 has sufficient rigidity, ensuring the overall strength of the stacked structure, effectively reducing the deformation difference between the front and rear fixed ends of the guide post boss 4, thereby reducing the risk of the tie rod being subjected to eccentric load.

[0043] During the injection molding process, the injection molding machine nozzle is connected to the injection hole of the mold through the injection nozzle mounting hole 7 to realize the injection molding function of the mold.

[0044] Furthermore, the fixed template structure is integrally injection molded. This design effectively improves the overall structural strength of the fixed template structure.

[0045] As a preferred embodiment of the above, the first reinforcing rib assembly 5 and / or the second reinforcing rib assembly 6 are in a star-shaped configuration. This configuration, through the star-shaped first reinforcing rib assembly 5 and / or the second reinforcing rib assembly 6, improves the connection strength between the mold connecting plate 1, the middle plate 2, and the tie rod connecting plate 3.

[0046] Specifically, the first reinforcing rib assembly 5 includes a first horizontal vertical rib 501 and a first diagonal oblique rib 502, and the second reinforcing rib assembly 6 includes a second horizontal vertical rib 601 and a second diagonal oblique rib 602. The first reinforcing rib assembly 5 and the second reinforcing rib assembly 6 are connected at their midpoints by an annular boss 9. The annular boss 9 is coaxially arranged with the injection nozzle mounting hole 7 mentioned above.

[0047] Furthermore, the ends of the first horizontal vertical rib 501 and the second horizontal vertical rib 601 away from the annular boss 9 extend to the edge of the middle plate 2. This arrangement allows the edge of the middle plate 2 to be connected to the tie rod connecting plate 3 / mold connecting plate 1 via the first horizontal vertical rib 501 / second horizontal vertical rib 601, which helps improve the overall integrity of the middle plate 2 and the tie rod connecting plate 3 / mold connecting plate 1. On the other hand, it maximizes the connection area between the first horizontal vertical rib 501 / second horizontal vertical rib 601 and the middle plate 2 and the tie rod connecting plate 3 / mold connecting plate 1, effectively improving the connection strength between the first horizontal vertical rib 501 / second horizontal vertical rib 601 and the middle plate 2 and the tie rod connecting plate 3 / mold connecting plate 1, and ensuring the overall rigidity.

[0048] Furthermore, the ends of the first diagonal ribs 502 and the second diagonal ribs 602 that are away from the annular boss 9 extend to the guide post boss 4. With this arrangement, since the guide post boss 4 is located at the four corners of the fixed template structure, extending the ends of the first diagonal ribs 502 and the second diagonal ribs 602 that are away from the annular boss 9 to the guide post boss 4 naturally forms the four diagonal sides of the rice-shaped structure.

[0049] Furthermore, the length of the first diagonal rib 502 is longer than the length of the second diagonal rib 602, and the end of the first diagonal rib 502 away from the annular boss 9 is connected to the guide post boss 4. With this configuration, the annular boss 9 and the guide post boss 4 are connected as one unit by the diagonally positioned first diagonal ribs 502, where the first diagonal rib 502 serves to support the guide post boss 4 and transmit force. Simultaneously, since the guide post boss 4 is only connected to the middle plate 2 and the tie rod connecting plate 3, meaning there is no guide post boss 4 between the middle plate 2 and the mold connecting plate 1, the end of the second diagonal rib 602 away from the annular boss 9 does not need to be connected to the guide post boss 4; therefore, in terms of design, the length of the second diagonal rib 602 can be shorter than the length of the first diagonal rib 502, i.e., the length of the first diagonal rib 502 is longer than the length of the second diagonal rib 602.

[0050] As a preferred embodiment, the four corners of the mold connecting plate 1 are recessed to form clearance areas 101. The clearance areas 101 do not overlap with the projection of the guide post boss 4 along the thickness direction of the fixed template structure. With this configuration, since the guide post boss 4 is not connected to the mold connecting plate 1, clearance areas 101 need to be provided at corresponding positions on the mold connecting plate 1 to prevent the mold connecting plate 1 from obstructing the sliding of the pull rod along the guide post boss 4. By designing the clearance areas 101 to not overlap with the projection of the guide post boss 4 along the thickness direction of the fixed template structure, it is ensured that the mold connecting plate 1 obstructs the sliding of the pull rod along the guide post boss 4.

[0051] As a preferred embodiment, the bottom of the fixed template structure is symmetrically provided with standing feet 8, which are connected to the middle plate 2 and the tie rod connecting plate 3, or the standing feet 8 are connected to the mold connecting plate 1, the middle plate 2, and the tie rod connecting plate 3. This arrangement allows the fixed template structure to stand stably on the injection molding machine base via the standing feet 8. The standing feet 8 can be designed to connect to the middle plate 2 and the tie rod connecting plate 3, or to the mold connecting plate 1, the middle plate 2, and the tie rod connecting plate 3; this application does not impose specific limitations on this. In this embodiment, the standing feet 8 are connected to the middle plate 2 and the tie rod connecting plate 3.

[0052] This utility model also discloses an injection molding machine, including the injection molding machine fixed platen structure of any of the above embodiments. For the specific structure of the injection molding machine fixed platen structure, please refer to the above embodiments. Since this injection molding machine adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated further here.

[0053] It should be noted that the fixed template structure of the injection molding machine and other contents of the injection molding machine disclosed in this utility model are existing technologies and will not be described in detail here.

[0054] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any application of this utility model directly or indirectly in other related technical fields is included within the patent protection scope of this utility model.

Claims

1. A fixed mold plate structure of an injection molding machine, provided with an injection nozzle mounting hole; characterized in that, The fixed mold plate structure comprises a mold connecting plate, a middle plate and a pull rod connecting plate arranged in sequence along the thickness direction of the fixed mold plate structure, and the mold connecting plate and the pull rod connecting plate are arranged on both sides of the middle plate; A guide column boss is arranged at each corner of the fixed mold plate structure, and the guide column boss is connected with the middle plate and the pull rod connecting plate; A first reinforcing rib assembly is arranged between the middle plate and the pull rod connecting plate; A second reinforcing rib assembly is arranged between the middle plate and the mold connecting plate, and the projections of the first reinforcing rib assembly and the second reinforcing rib assembly along the thickness direction of the fixed mold plate structure overlap each other.

2. The injection molding machine fixed platen structure of claim 1 wherein: The first reinforcing rib assembly and / or the second reinforcing rib assembly are in the shape of a rice character.

3. The injection molding machine fixed platen structure of claim 2 wherein: The first reinforcing rib assembly comprises a first horizontal vertical rib and a first pair of diagonal inclined ribs, the second reinforcing rib assembly comprises a second horizontal vertical rib and a second pair of diagonal inclined ribs, and the middle part of the first reinforcing rib assembly and the second reinforcing rib assembly is connected by a ring-shaped boss.

4. The injection molding machine fixed platen structure of claim 3 wherein: The first horizontal vertical rib and the second horizontal vertical rib extend to the edge of the middle plate at the end away from the ring-shaped boss; and / or, the first pair of diagonal inclined ribs and the second pair of diagonal inclined ribs extend to the guide column boss at the end away from the ring-shaped boss.

5. The injection molding machine fixed platen structure of claim 4 wherein, The length of the first pair of diagonal inclined ribs is longer than the length of the second pair of diagonal inclined ribs.

6. The injection molding machine fixed platen structure of claim 5 wherein, The end of the first pair of diagonal inclined ribs away from the ring-shaped boss is connected to the guide column boss.

7. The injection molding machine fixed platen structure of claim 1 wherein: The four corners of the mold connecting plate are recessed to form a clearance area, and the projection of the clearance area along the thickness direction of the fixed mold plate structure does not overlap with the projection of the guide column boss.

8. The injection molding machine fixed platen structure of claim 1 wherein: The bottom of the fixed mold plate structure is symmetrically provided with a standing foot, and the standing foot is connected to the middle plate and the pull rod connecting plate, or the standing foot is connected to the mold connecting plate, the middle plate and the pull rod connecting plate.

9. The injection molding machine fixed platen structure of claim 1 wherein: The fixed mold plate structure is integrally injection molded.

10. An injection molding machine characterized by: The injection molding machine comprises the fixed mold plate structure of any one of claims 1 to 9.

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