An upper die suspended low-pressure die structure

Abstract

The utility model relates to mould technical field, and disclose a kind of upper die suspension type low-pressure mould structure.This kind of upper die suspension type low-pressure mould structure, including base and fixed plate, the surface of base is equipped with mounting slot, the inner wall of base mounting slot is slidably connected with lower mould, the side of fixed plate is equipped with four guide columns, the arc surface of four guide columns is slidably connected with upper die, and lower mould is fixedly connected with the arc surface of guide column.The four guide columns installed in the side of fixed plate form multidimensional guiding system, and the arc surface of upper die and guide column is slidably connected, and lower mould and guide column arc surface are fixedly connected, to ensure that upper die always moves along guide column axis during lifting process, and is accurately aligned with lower mould;Meanwhile, the L-shaped plate of upper die two sides and the inner surface of the fixed frame of lower mould two sides are slidably connected, further limit the lateral deviation of upper die, form guide column plus L-shaped plate and fixed frame double positioning, greatly improve installation positioning accuracy.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a low-pressure mold structure with an upper mold suspension. Background Technology

[0002] Low-pressure molds are important equipment in the field of injection molding and are widely used in the production of plastic products. Their mold opening and closing accuracy, ease of installation and structural stability directly affect the product molding quality and production efficiency.

[0003] Regarding the aforementioned and existing related technologies, the inventors believe that the following defects often exist: Traditional low-pressure molds often have the lower mold directly fixed to the base surface, while the upper mold is connected to the frame via a simple slide rail, lacking a precise guiding and positioning structure. During installation, repeated adjustments to the alignment of the upper and lower molds are required, especially when changing mold models. This calibration process is time-consuming and inaccurate, easily leading to misalignment of the upper and lower molds, resulting in defects such as flash and material shortages in the molded products. Furthermore, during mold opening and closing, the upper mold is prone to tilting and shaking due to uneven force. Especially during low-pressure injection molding, the mold closing force is relatively small, and upper mold misalignment can cause poor sealing of the mold cavity, resulting in molten material leakage, affecting product quality, and even damaging the mold cavity. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing technology has the disadvantage of misalignment between the upper and lower molds due to the lack of precise guidance, resulting in flash and material shortage in the molded products. To address this, we propose an upper mold suspension type low-pressure mold structure.

[0005] To achieve the above objectives, this application adopts the following technical solution: a suspended low-pressure mold structure, comprising a base and a fixing plate, wherein an installation groove is provided on the surface of the base, and a lower mold is slidably connected to the inner wall of the mounting groove of the base; four guide pillars are installed on one side of the fixing plate, and an upper mold is slidably connected to the arc surfaces of the four guide pillars; the lower mold is fixedly connected to the arc surfaces of the guide pillars; L-shaped plates are fixedly connected to both sides of the upper mold, and fixing frames are fixedly connected to both sides of the lower mold; the L-shaped plates are slidably connected to the inner surfaces of the fixing frames.

[0006] Preferably, mounting brackets are fixedly connected to both sides of the lower mold, a first spring is fixedly connected to the inner surface of the mounting bracket, and a buffer block is fixedly connected to the other end of the first spring, the buffer block being directly below the L-shaped plate.

[0007] Preferably, a rubber pad is fixedly connected to the surface of the buffer block.

[0008] Preferably, the base has two sliding plates slidably connected to its surface. The plates are L-shaped, and a slide plate is fixedly connected to one side of each plate. A positioning pin is slidably connected inside the slide plate. The base has four positioning grooves on its surface. The positioning pin is slidably connected to the inner wall of the positioning groove, and a round block is fixedly connected to one end of the positioning pin.

[0009] Preferably, the arc surface of the positioning pin is fitted with a second spring, and the two ends of the second spring are fixedly connected to the circular block and the sliding plate, respectively.

[0010] Preferably, a soft pad is fixedly connected to the inner wall of the base mounting groove.

[0011] Preferably, the four sides of the base mounting groove are rounded.

[0012] The technical effects and advantages of this utility model are as follows: The four guide columns installed on one side of the fixed plate form a multi-dimensional guiding system. The upper mold is slidably connected to the arc surface of the guide column, and the lower mold is fixedly connected to the arc surface of the guide column, ensuring that the upper mold always moves along the axis of the guide column during the lifting process and maintains precise alignment with the lower mold. At the same time, the L-shaped plates on both sides of the upper mold are slidably connected to the inner surfaces of the fixed frames on both sides of the lower mold, further limiting the lateral displacement of the upper mold, forming a dual positioning of guide columns, L-shaped plates and fixed frames, which greatly improves the installation positioning accuracy. Attached Figure Description

[0013] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 In this utility model Figure 1 Partial structural diagram;

[0016] Figure 3 This is a schematic diagram of the lower mold structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the mounting bracket in this utility model;

[0018] Figure 5 This is a schematic diagram of the base structure in this utility model;

[0019] Figure 6 In this utility model Figure 5 Enlarged view of point A.

[0020] Legend: 1. Base; 2. Lower mold; 3. Fixing plate; 4. Guide column; 5. Upper mold; 6. L-shaped plate; 7. Fixing frame; 8. Mounting frame; 9. First spring; 10. Buffer block; 11. Rubber pad; 12. Clamping plate; 13. Positioning pin; 14. Round block; 15. Positioning groove; 16. Second spring; 17. Soft pad; 18. Slide plate. Detailed Implementation

[0021] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0022] Reference Figure 1-6 As shown, this utility model provides a technical solution: a suspended low-pressure mold structure, including a base 1 and a fixing plate 3. The surface of the base 1 is provided with an installation groove. The inner wall of the installation groove of the base 1 is slidably connected to a lower mold 2. Four guide pillars 4 are installed on one side of the fixing plate 3. The arc surfaces of the four guide pillars 4 are slidably connected to an upper mold 5. The lower mold 2 is fixedly connected to the arc surfaces of the guide pillars 4. L-shaped plates 6 are fixedly connected to both sides of the upper mold 5. Fixing frames 7 are fixedly connected to both sides of the lower mold 2. The inner surfaces of the L-shaped plates 6 and the fixing frames 7 are slidably connected. The four guide pillars 4 installed on one side of the fixed plate 3 form a multi-dimensional guiding system. The upper mold 5 is slidably connected to the arc surface of the guide pillar 4, and the lower mold 2 is fixedly connected to the arc surface of the guide pillar 4, ensuring that the upper mold 5 always moves along the axis of the guide pillar 4 during the lifting process and maintains precise alignment with the lower mold 2. At the same time, the L-shaped plates 6 on both sides of the upper mold 5 are slidably connected to the inner surfaces of the fixed frames 7 on both sides of the lower mold 2, further limiting the lateral displacement of the upper mold 5, forming a dual positioning of guide pillar 4 plus L-shaped plates 6 and fixed frames 7, which greatly improves the installation positioning accuracy.

[0023] Reference Figure 4 As shown in this embodiment: Mounting brackets 8 are fixedly connected to both sides of the lower mold 2. A first spring 9 is fixedly connected to the inner surface of the mounting bracket 8, and a buffer block 10 is fixedly connected to the other end of the first spring 9. The buffer block 10 is directly below the L-shaped plate 6. When the mold closes, the upper mold 5 moves the L-shaped plate 6 downwards, and the bottom of the L-shaped plate 6 contacts the buffer block 10. The first spring 9 inside the mounting bracket 8 will undergo elastic deformation due to pressure, absorbing the impact force between the L-shaped plate 6 and the lower mold 2, avoiding hard contact impact at the moment of mold closing, and reducing damage to the upper mold 5, lower mold 2, and guide components.

[0024] Reference Figure 4As shown in this embodiment, a rubber pad 11 is fixedly connected to the surface of the buffer block 10. The rubber pad 11 has elastic deformation capability and forms a double buffer structure of spring and rubber with the first spring 9, which can further absorb the impact force between the L-shaped plate 6 and the buffer block 10 during mold closing, reduce impact noise, and improve the comfort of the operating environment.

[0025] Reference Figure 5 As shown in this embodiment: two L-shaped clamping plates slidably connect to the surface of the base 1. A sliding plate 18 is fixedly connected to one side of the clamping plate 12, and a positioning pin 13 is slidably connected inside the sliding plate 18. Four positioning grooves 15 are formed on the surface of the base 1. The positioning pin 13 is slidably connected to the inner wall of the positioning groove 15, and a round block 14 is fixedly connected to one end of the positioning pin 13. After the lower mold 2 slides into the mounting groove of the base 1, the two L-shaped clamping plates 12 are pushed to slide closer to the lower mold 2, so that the clamping plates 12 fit against the side of the lower mold 2. Then, the positioning pin 13 inside the sliding plate 18 is inserted into the corresponding positioning groove 15 on the surface of the base 1, which can quickly fix the lower mold 2 without removing the bolts, making the operation convenient.

[0026] Reference Figure 6 As shown in this embodiment: a second spring 16 is fitted onto the arc surface of the positioning pin 13, and the two ends of the second spring 16 are fixedly connected to the circular block 14 and the sliding plate 18, respectively. When the circular block 14 is pulled to disengage the positioning pin 13 from the positioning groove 15, the second spring 16 is stretched to generate elastic potential energy; after the circular block 14 is released, the second spring 16 retracts, which can drive the positioning pin 13 to automatically insert into the positioning groove 15 without manual alignment, simplifying the fixing operation steps of the lower mold 2 and improving efficiency.

[0027] Reference Figure 6 As shown in this embodiment, a soft pad 17 is fixedly connected to the inner wall of the mounting groove of the base 1. When the lower mold 2 slides along the mounting groove, the soft pad 17 can prevent the lower mold 2 from making direct hard contact with the inner wall of the mounting groove, reduce scratches and wear on the side of the lower mold 2, and protect the integrity of the cavity edge of the lower mold 2.

[0028] Reference Figure 6 As shown in this embodiment, the four sides of the base mounting groove are rounded. The rounded corners of the mounting groove eliminate sharp edges, preventing operators from being scratched by sharp corners when installing or replacing the lower mold 2, thus improving operational safety.

[0029] Working principle: The mounting groove on the surface of the base 1 has rounded corners on all four sides, which guides the lower mold 2 to slide smoothly along the mounting groove, avoiding the sharp edges of the lower mold 2 getting stuck. At the same time, the soft pad 17 fixed to the inner wall of the mounting groove can prevent the lower mold 2 from making direct hard contact with the inner wall of the mounting groove, reducing scratches and wear on the side of the lower mold 2 and protecting the integrity of the cavity edge of the lower mold 2. The operator can easily slide the lower mold 2 into the preset position in the mounting groove. After the lower mold 2 is in place, push the two L-shaped clamping plates 12 that are slidably connected on the surface of the base 1, so that the clamping plates 12 move closer to the lower mold 2 until the inner side of the clamping plates 12 fits against the two sides of the lower mold 2. At this time, pull the round block 14 on the slide plate 18 on one side of the clamping plate 12, which drives the positioning pin 13 in the slide plate 18 to move outward. When the positioning pin 13 is aligned with the bottom... After the positioning groove 15 corresponding to the surface of seat 1 is reached, the round block 14 is released, and the second spring 16 retracts, causing the positioning pin 13 to automatically insert into the positioning groove 15. The positioning of the clamping plate 12 can be completed without manual alignment, thereby achieving rapid fixation of the lower mold 2. Moreover, the two clamping plates 12 limit the lower mold 2 from both sides, preventing it from shifting forward, backward, left, or right due to vibration during injection molding. The four guide pillars 4 installed on one side of the fixing plate 3 form a multi-dimensional guiding system. The upper mold 5 is slidably connected to the arc surface of the guide pillars 4, and the lower mold 2 is fixedly connected to the arc surface of the guide pillars 4. When the drive mechanism is activated to move the upper mold 5 downward along the axis of the guide pillars 4, the guide pillars 4 can ensure that the upper mold 5 always remains coaxially aligned with the lower mold 2. At the same time, the L-shaped plates on both sides of the upper mold 5 descend synchronously with the upper mold 5, and the lower mold 2 is aligned with the sides of the lower mold 2. The sliding fit of the inner surface of the fixing frame 7 further restricts the lateral displacement of the upper mold 5, forming a dual positioning system of guide post 4, L-shaped plate 6, and fixing frame 7, which greatly improves the mold closing accuracy and avoids cavity misalignment. When the L-shaped plate descends to near the bottom of the fixing frame 7, the bottom of the L-shaped plate contacts the buffer blocks 10 in the mounting brackets 8 on both sides of the lower mold 2. The rubber pads 11 fixed on the surface of the buffer blocks 10 first contact the L-shaped plate, and initially absorb the impact force through the elastic deformation of the rubber. Then, the L-shaped plate continues to press down on the buffer blocks 10, causing the first spring 9 in the mounting bracket 8 to be compressed and generate elastic deformation, forming a "spring + rubber" dual buffer structure, which further absorbs the mold closing impact force between the L-shaped plate and the lower mold 2, avoiding damage to the cavities of the upper mold 5 and lower mold 2 caused by instantaneous hard contact during mold closing, and at the same time reducing Impact noise reduction improves the comfort of the operating environment; after mold closing, the friction between the rubber pad 11 and the L-shaped plate can also help limit the slight shaking of the L-shaped plate, enhance the mold closing stability of the upper mold 5, ensure the sealing performance of the mold cavity, and prevent molten material leakage during injection. The second spring 16 on the positioning pin 13 always applies a pulling force to the positioning pin 13 in the direction of the positioning groove 15 to prevent the positioning pin 13 from falling out of the positioning groove 15 due to injection vibration, and ensure the fixing stability of the clamping plate 12 on the lower mold 2; the soft pad 17 on the inner wall of the mounting groove can absorb the vibration energy transmitted to the mounting groove during injection, reduce the impact of vibration on the base 1 and the overall structure of the mold, reduce component wear, and at the same time, the soft pad 17 fits against the side of the lower mold 2, which can fill the small gaps and further prevent molten material from overflowing from the gaps.

[0030] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A suspended low-pressure mold structure, characterized in that, The device includes a base (1) and a fixing plate (3). The surface of the base (1) is provided with an installation groove. The inner wall of the installation groove of the base (1) is slidably connected to a lower mold (2). Four guide pillars (4) are installed on one side of the fixing plate (3). The arc surfaces of the four guide pillars (4) are slidably connected to an upper mold (5). The lower mold (2) is fixedly connected to the arc surfaces of the guide pillars (4). L-shaped plates (6) are fixedly connected to both sides of the upper mold (5). Fixing frames (7) are fixedly connected to both sides of the lower mold (2). The inner surface of the L-shaped plates (6) is slidably connected to the fixing frames (7).

2. The upper mold suspension type low-pressure mold structure according to claim 1, characterized in that: The lower mold (2) is fixedly connected to both sides of the mounting bracket (8), and the inner surface of the mounting bracket (8) is fixedly connected to the first spring (9). The other end of the first spring (9) is fixedly connected to the buffer block (10), which is directly below the L-shaped plate (6).

3. The upper mold suspension type low-pressure mold structure according to claim 2, characterized in that: A rubber pad (11) is fixedly connected to the surface of the buffer block (10).

4. The upper mold suspension type low-pressure mold structure according to claim 1, characterized in that: The base (1) has two sliding plates (12) connected to its surface. The plates (12) are L-shaped. A sliding plate (18) is fixedly connected to one side of the plates (12). A positioning pin (13) is slidably connected inside the sliding plate (18). The base (1) has four positioning grooves (15) on its surface. The positioning pin (13) is slidably connected to the inner wall of the positioning groove (15). A round block (14) is fixedly connected to one end of the positioning pin (13).

5. The upper mold suspension type low-pressure mold structure according to claim 4, characterized in that: The locating pin (13) has a second spring (16) fitted on its arc surface. The two ends of the second spring (16) are fixedly connected to the round block (14) and the sliding plate (18) respectively.

6. The upper mold suspension type low-pressure mold structure according to claim 1, characterized in that: The inner wall of the mounting groove of the base (1) is fixedly connected with a soft pad (17).

7. The upper mold suspension type low-pressure mold structure according to claim 1, characterized in that: The four sides of the mounting groove of the base (1) are rounded.

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