A vacuum injection molding structure

Abstract

The application relates to the technical field of packaging equipment, in particular to a vacuum injection molding structure which comprises a base, an upper mold and a lower mold, a vacuum extraction pipe is arranged on the lower mold and communicates with a lower mold cavity, a vacuum pump is arranged on the base and connected with the vacuum extraction pipe, an upper outer frame is arranged on the base, the upper mold is located in the upper outer frame, a lower outer frame is arranged on the base, the lower mold is arranged in the lower outer frame, a sealing element for sealing the joint of the upper mold and the lower mold is arranged on the upper outer frame, and an exhaust assembly for exhausting air bubbles in the cavity formed by the upper mold and the lower mold after injection molding is arranged on the base. The application has the effects of avoiding air bubble generation and improving the quality of injection molding products.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of packaging equipment, in particular to a vacuum injection molding structure. BACKGROUND

[0002] When some products are injection molded, an injection mold is usually used. The injection mold is usually composed of an upper mold and a lower mold. The mold cores in the upper mold and the lower mold are matched to obtain a cavity of the product, and molten plastic is injected into the cavity from a gate for filling.

[0003] After the mold is closed, the mold cores in the upper mold and the lower mold form a closed cavity, and the cavity is only communicated with the outside through the gate. Air is retained in the cavity, and when the molten plastic is injected from the gate, the gate is filled with plastic, and the air in the cavity cannot escape, thereby forming air bubbles in the interior of the plastic product, which affects the molding quality of the product. SUMMARY

[0004] In order to avoid air bubbles as much as possible and improve the quality of the injection molded product, the application provides a vacuum injection molding structure.

[0005] The application provides a vacuum injection molding structure which adopts the following technical scheme:

[0006] The vacuum injection molding structure comprises a base, an upper mold and a lower mold. The lower mold is provided with a vacuum extraction pipe which is communicated with a cavity of the lower mold. The base is provided with a vacuum pump which is connected with the vacuum extraction pipe. The base is provided with an upper outer frame. The upper mold is located in the upper outer frame. The base is provided with a lower outer frame. The lower mold is arranged in the lower outer frame. The upper outer frame is provided with a sealing element which is used for sealing the joint of the upper mold and the lower mold. The base is provided with an exhaust assembly which is used for exhausting air bubbles in the cavity formed by the upper mold and the lower mold after injection molding.

[0007] Through the above technical scheme, after the upper mold and the lower mold are closed, the sealing element seals the joint of the upper mold and the lower mold. Then, the cavity formed by the upper mold and the lower mold is extracted by the vacuum pump. After injection molding, the air bubbles leaked or remaining in the cavity formed by the upper mold and the lower mold are exhausted by the exhaust assembly. Thus, the possibility of air bubbles formed in the interior of the product is reduced, the influence of air on the injection molded product is reduced, and the quality of the product is improved.

[0008] Optionally, the sealing element comprises a sealing ring arranged on the upper outer frame. The lower outer frame is provided with a sealing groove. The sealing ring is inserted into the sealing groove.

[0009] Through the above technical scheme, the sealing ring on the upper outer frame is inserted into the sealing groove of the lower outer frame, thereby sealing the joint gap between the lower mold and the upper mold. The possibility of external air entering the cavity formed by the upper mold and the lower mold after vacuum extraction is reduced, thereby reducing the influence of air.

[0010] Optionally, the exhaust assembly comprises a vibrator arranged at the bottom of the lower outer frame, a first vibration spring is arranged between the bottom and the base, one end of the first vibration spring is connected with the lower outer frame, and the other end is connected with the base, a mounting plate for mounting the upper mold is arranged on the base, a second vibration spring is arranged between the upper outer frame and the mounting plate, one end of the second vibration spring is connected with the upper outer frame, and the other end is connected with the mounting plate, a brake for placing the lower mold is arranged on the base, and a connecting piece for blocking the separation of the upper mold and the lower mold is arranged on the base.

[0011] By adopting the above technical scheme, after injection molding, the upper mold and the lower mold are fixed by using the connecting piece, and then the vibrator is used to make the upper mold and the lower mold vibrate up and down together, so that the liquid after injection molding vibrates in the cavity of the upper mold and the lower mold, and the bubbles move out upwardly with the vibration, thereby avoiding the possibility of bubbles existing in the product as much as possible, and the product formed by pouring can be made more compact during the vibration, thereby further improving the quality of the product.

[0012] Optionally, a collecting cavity for collecting bubbles is arranged on the upper mold, and the collecting cavity is communicated with the cavity of the upper mold.

[0013] By adopting the above technical scheme, the bubbles remaining in the cavities of the upper mold and the lower mold gradually move upwardly in the vibration and enter the collecting cavity to accumulate therein, thereby avoiding the possibility of bubbles in the product as much as possible, and the formed corners in the collecting cavity can be cut off after subsequent demolding.

[0014] Optionally, the brake comprises a first brake plate slidingly arranged on the base, the sliding direction of the first brake plate is along the vertical direction, a first air cylinder for driving the sliding of the first brake plate is arranged on the base, a second brake plate is slidingly arranged on the mounting plate, the sliding direction of the second brake plate is along the vertical direction, a second air cylinder for driving the sliding of the second brake plate is arranged on the mounting plate, when the first brake plate abuts against the bottom of the lower mold, the second brake plate abuts against the top of the upper mold.

[0015] By adopting the above technical scheme, after the bubbles are exhausted by vibration, the first air cylinder is started to extend the piston rod to abut the first brake plate against the bottom of the lower mold, at the same time, the second air cylinder is started to extend the piston rod to abut the second brake plate against the top of the upper mold, so that the lower mold and the upper mold are stably fixed in the middle, thereby facilitating the solidification after injection molding.

[0016] Optionally, the connecting member comprises a connecting plate slidingly arranged on the base, the connecting plate slides towards the direction away from or close to the lower die, a sliding plate is slidingly arranged on the connecting plate, the sliding direction of the sliding plate is along the vertical direction, two limiting plates are arranged on the sliding plate, and the two limiting plates are respectively in abutment with the top of the upper die and the bottom of the lower die.

[0017] By adopting the above technical scheme, after the upper die and the lower die are closed, the two limiting plates are respectively in abutment with the top of the upper die and the bottom of the lower die, and the upper die and the lower die are fixed, so that the possibility of disengagement of the upper die and the lower die in the subsequent vibration process is avoided, and the gas entering the cavity formed by the upper die and the lower die is reduced.

[0018] Optionally, limiting springs are arranged at the two ends of the sliding plate, one end of the limiting spring is connected to the sliding plate, and the other end of the limiting spring is connected to the connecting plate.

[0019] By adopting the above technical scheme, the limiting spring drives the sliding plate to return to the middle part of the connecting plate, so that at the beginning, the opposite sides of the two limiting plates are flush with the top of the upper die and the bottom of the lower die respectively, thereby facilitating the clamping of the upper die and the lower die between the two limiting plates.

[0020] Optionally, a telescopic rod is sleeved in the first vibration spring and the second vibration spring.

[0021] By adopting the above technical scheme, the telescopic rod plays a guiding role in the vibration of the upper die and the lower die, so that the lower die and the upper die are kept in alignment, the deviation of the upper die and the lower die due to vibration is reduced, and the closing of the upper die and the lower die is facilitated.

[0022] Optionally, a thimble is arranged on the upper die, and a limiting slot for inserting the thimble is arranged on the lower die.

[0023] By adopting the above technical scheme, when the upper die and the lower die are closed, the thimble on the upper die is inserted into the limiting slot in the lower die, thereby realizing the connecting positioning of the upper die and the lower die, reducing the possibility of separation between the upper die and the lower die, and improving the stability of the connection of the upper die and the lower die.

[0024] Optionally, an inclined surface is arranged on the opposite side of each of the two limiting plates, and the distance from the side of the inclined surface away from the sliding plate to the middle part of the sliding plate is greater than the distance from the side of the inclined surface close to the sliding plate to the middle part of the sliding plate.

[0025] By adopting the above technical scheme, the inclined surface on the limiting block facilitates the movement of the limiting block to the upper die and the lower die, and the fixation of the upper die and the lower die, and when there is a certain positional deviation between the upper die and the lower die, the two limiting plates can also be moved to the top of the upper die and the bottom of the lower die, thereby facilitating the fixation of the upper die and the lower die.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. After the upper mold and the lower mold are closed, the sealing member seals the connection between the upper mold and the lower mold, then a vacuum pump is used to extract the cavity formed by the upper mold and the lower mold to vacuum, then injection molding, and after injection molding, the leaked or residual bubbles in the cavity of the upper mold and the lower mold are discharged through the exhaust assembly; thereby reducing the possibility of forming bubbles inside the product, reducing the influence of air on the injection molded product, and improving the quality of the product;

[0028] 2. After injection molding, the upper mold and the lower mold are fixed using the connecting member, and then the vibrator is used to make the upper mold and the lower mold vibrate up and down together, and in the process of vibration, the liquid after injection molding is vibrated in the cavity of the upper mold and the lower mold, and the bubbles are removed with the vibration, thereby avoiding the possibility of bubbles in the product as much as possible, and in the process of vibration, the product formed by pouring can be made more compact, further improving the quality of the product;

[0029] 3. The bubbles remaining in the cavity of the upper mold and the lower mold gradually move upward in the vibration and enter the collection cavity, and are gathered in the collection cavity, thereby avoiding the possibility of bubbles in the product as much as possible, and after subsequent demolding, the formed corners in the collection cavity are cut off. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application.

[0031] Figure 2 is a sectional view of the embodiment of the present application.

[0032] Figure 3 is another angle sectional view of the embodiment of the present application.

[0033] Figure 4 is Figure 3 is an enlarged schematic diagram of part A.

[0034] BRIEF DESCRIPTION OF DRAWINGS: 1, base; 2, upper mold; 3, lower mold; 4, vacuum extraction pipe; 5, vacuum pump; 6, upper outer frame; 7, lower outer frame; 8, sealing ring; 9, vibrator; 10, first vibration spring; 11, mounting plate; 12, second vibration spring; 13, collection cavity; 14, first brake plate; 15, first air cylinder; 16, second brake plate; 17, second air cylinder; 18, connecting plate; 19, sliding plate; 20, limiting plate; 21, limiting spring; 22, telescopic rod; 23, ejector pin; 24, limiting groove; 25, support rod; 26, first placement groove; 27, avoidance groove; 28, second placement groove; 29, third air cylinder; 30, vacuum extraction groove; 31, communication hole; 32, sealing plate; 33, end cap; 34, fourth air cylinder; 35, sealing groove. DETAILED DESCRIPTION

[0035] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0036] This application discloses a vacuum injection molding structure. (Refer to...) Figure 1 and Figure 2 The vacuum injection molding structure includes a base 1, an upper mold 2, and a lower mold 3. A vacuum tube 4 connected to the lower mold 3 and communicating with the cavity of the lower mold 3 is connected to the lower mold 3. The part of the vacuum tube 4 outside the lower mold 3 is a flexible tube. A vacuum pump 5 is installed on the base 1 and connected to the vacuum tube 4. An upper outer frame 6 is connected to the base 1 and the upper mold 2 is placed inside the upper outer frame 6. A lower outer frame 7 is connected to the base 1 and the lower mold 3 is placed inside the lower outer frame 7. A sealing element is provided on the upper outer frame 6 to seal the connection between the upper mold 2 and the lower mold 3. An exhaust assembly is provided on the base 1 to expel air bubbles formed in the cavity of the upper mold 2 and the lower mold 3 after injection molding.

[0037] Reference Figure 1 and Figure 2 After vacuum pump 5 is used to evacuate the cavity formed by upper mold 2 and lower mold 3, there is air leakage in the cavity between upper mold 2 and lower mold 3, or there is gas that is not completely extracted, causing air bubbles to form inside the product, thus affecting the quality of the product; the exhaust assembly includes a vibrator 9 installed and fixed at the bottom of the lower outer frame 7. A first vibration spring 10 is connected between the bottom of the lower outer frame 7 and the base 1. One end of the first vibration spring 10 is connected to the bottom of the lower outer frame 7, and the other end is connected to the base 1. The bottom four corners of the lower outer frame 7 are all connected to the first vibration spring 10; a telescopic rod 22 is sleeved inside the first vibration spring 10. One end of the telescopic rod 22 is connected to the upper outer frame 6, and the other end is connected to the base 1. The telescopic rod 22 plays a role in limiting and supporting the spring, so that the lower mold 3 can only vibrate up and down.

[0038] Reference Figure 1 and Figure 2A mounting plate 11 for mounting the upper mold 2 is slidably connected to the base 1. The sliding direction of the mounting plate 11 is vertical. A support rod 25 is fixedly connected between the mounting plate 11 and the upper surface of the base 1. The support rod 25 is a telescopic rod. There are four support rods 25, which are located at the four corners of the mounting plate 11. One end of the support rod 25 is fixed to the sliding plate 19, and the other end is fixed to the base 1. A hydraulic cylinder (not shown in the figure) is installed on the base 1 to drive the mounting plate 11 to slide up and down. A second vibration spring 12 is connected between the upper outer frame 6 and the mounting plate 11. One end of the second vibration spring 12 is fixedly connected to the upper outer frame 6, and the other end is fixedly connected to the mounting plate 11. A telescopic rod 22 is also sleeved inside the second vibration spring 12. One end of the telescopic rod 22 is fixed to the top of the upper outer frame 6, and the other end is fixedly connected to the bottom of the mounting plate 11. A braking component for stationary lower mold 3 is provided on the base 1, and a connecting component for preventing the separation of upper mold 2 and lower mold 3 is provided on the base 1.

[0039] After injection molding, the upper mold 2 and lower mold 3 are fixed, and then a vibrator is used to make the upper mold 2 and lower mold 3 vibrate up and down together. During the vibration, the injected liquid vibrates within the cavities of the upper mold 2 and lower mold 3, and air bubbles rise and move out with the vibration, thus minimizing the possibility of air bubbles inside the product. Furthermore, the vibration process makes the cast product more compact, further improving product quality. The telescopic rod 22 guides the vibration of the upper mold 2 and lower mold 3, keeping the lower mold 3 and upper mold 2 aligned and reducing displacement caused by vibration, facilitating the closing of the upper mold 2 and lower mold 3.

[0040] Reference Figure 2 and Figure 3 The upper mold 2 has a collection cavity 13 for collecting air bubbles, which is connected to the cavity of the upper mold 2. Air bubbles remaining in the cavities of the upper mold 2 and lower mold 3 gradually move upwards during vibration and enter the collection cavity 13, where they accumulate. This minimizes the possibility of air bubbles remaining inside the product. After demolding, the edges formed in the collection cavity 13 can be cut off, and these cut edges can be melted down and reused as raw material, preventing material waste. The upper mold 2 is connected to ejector pins 23, and the lower mold 3 has a limiting groove 24 for inserting the ejector pins 23. When the upper mold 2 and lower mold 3 are closed, the ejector pins 23 on the upper mold 2 are inserted into the limiting groove 24 in the lower mold 3, thus achieving the connection and positioning of the upper mold 2 and lower mold 3, reducing the possibility of separation between them, and improving the stability of the connection between the upper mold 2 and lower mold 3.

[0041] Reference Figure 2 and Figure 3The sealing element includes a sealing ring 8 disposed on the upper outer frame 6, and a sealing groove 35 formed on the lower outer frame 7, into which the sealing ring 8 is inserted. The sealing ring 8 on the upper outer frame 6 is inserted into the sealing groove 35 of the lower outer frame 7, thereby sealing the connection gap between the lower mold 3 and the upper mold 2. This reduces the possibility of external air entering the cavity formed by the upper mold 2 and the lower mold 3 after vacuuming, thus minimizing the influence of air.

[0042] Reference Figure 1 , Figure 2 and Figure 3 The braking component includes a first brake plate 14 slidably connected to the base 1. The sliding direction of the first brake plate 14 is vertical. A first placement groove 26 is provided on the base 1. The first brake plate 14 is slidably connected in the first placement groove 26. When the first brake plate 14 is completely moved into the first placement groove 26, the first brake plate 14 is disengaged from the lower outer frame 7. A first cylinder 15 for driving the sliding of the first brake plate 14 is installed on the base 1. The piston rod of the first cylinder 15 is connected to the first brake plate 14. A clearance groove 27 for placing the vibrator 9 is provided on the first brake plate 14. When the first brake plate 14 abuts against the lower outer frame 7, the vibrator 9 is placed in the clearance groove 27. A second brake plate 16 is slidably connected to the mounting plate 11. The sliding direction of the second brake plate 16 is vertical. A second cylinder 17 for driving the second brake plate 16 to slide is mounted on the mounting plate 11. A second placement groove 28 is provided on the mounting plate 11, and the second brake plate 16 is slidably connected in the second placement groove 28. When the second brake plate 16 is fully moved into the second placement groove 28, the second brake plate 16 disengages from the upper outer frame 6. When the first brake plate 14 abuts against the bottom of the lower mold 3, the second brake plate 16 abuts against the top of the upper mold 2. Both the first brake plate 14 and the second brake plate 16 are covered with shock-absorbing rubber pads to reduce vibration damage to the device.

[0043] After the vibration removes the air bubbles, the first cylinder 15 extends its piston rod to bring the first brake plate 14 into contact with the bottom of the lower mold 3. At the same time, the second cylinder 17 extends its piston rod to bring the second brake plate 16 into contact with the top of the upper mold 2, so that the lower mold 3 and the upper mold 2 are firmly fixed in the middle, which facilitates solidification after injection molding.

[0044] Reference Figure 1 and Figure 2The connecting component includes a connecting plate 18 slidably connected to the base 1. The connecting plate 18 slides in a direction away from or towards the lower mold 3. The lower mold 3 is provided with connecting plates 18 on both opposite sides. A third cylinder 29 is installed on the base 1. The piston rod of the third cylinder 29 is connected to the connecting plate 18. A sliding plate 19 is slidably connected to the connecting plate 18. The sliding direction of the sliding plate 19 is vertical. Two limiting plates 20 are integrally formed on the sliding plate 19. The two limiting plates 20 are located at both ends of the sliding plate 19. The opposite sides of the two limiting plates 20 abut against the top of the upper mold 2 and the bottom of the lower mold 3, respectively.

[0045] After the upper mold 2 and the lower mold 3 are closed, the two limiting plates 20 are respectively abutted against the top of the upper mold 2 and the bottom of the lower mold 3 to fix the upper mold 2 and the lower mold 3, thereby avoiding the possibility of the upper mold 2 and the lower mold 3 separating during subsequent vibration, and reducing the amount of gas entering the cavity formed by the upper mold 2 and the lower mold 3.

[0046] Reference Figure 1 and Figure 2 Both ends of the sliding plate 19 are connected to limit springs 21. One end of the limit spring 21 is connected to the sliding plate 19, and the other end is connected to the connecting plate 18. The limit springs 21 drive the sliding plate 19 back to the middle of the connecting plate 18, so that initially, the opposite sides of the two limit plates 20 are flush with the top of the upper mold 2 and the bottom of the lower mold 3, respectively, which facilitates the engagement of the upper mold 2 and the lower mold 3 between the two limit plates 20.

[0047] Reference Figure 1 and Figure 2 Both limiting plates 20 have inclined surfaces on opposite sides. The distance from the side of the inclined surface away from the sliding plate 19 to the middle of the sliding plate 19 is greater than the distance from the side of the inclined surface closer to the sliding plate 19 to the middle of the sliding plate 19. The inclined surfaces on the limiting blocks facilitate the movement of the limiting blocks onto the upper mold 2 and the lower mold 3, fixing the upper mold 2 and the lower mold 3. Even when there is a certain positional deviation between the upper mold 2 and the lower mold 3, the two limiting plates 20 can still be moved to the top of the upper mold 2 and the bottom of the lower mold 3.

[0048] Reference Figure 3 and Figure 4A vacuum groove 30 is provided on the lower mold 3, and a vacuum tube 4 is connected to the vacuum groove 30. A connecting hole 31 for connecting the vacuum groove 30 and the cavity of the lower mold 3 is provided on the side of the vacuum groove 30 near the cavity of the lower mold 3. A sealing plate 32 is slidably connected in the vacuum groove. A sealing head 33 is integrally formed on the sealing plate 32. The diameter of the sealing head 33 is the same as that of the connecting hole 31, and the length of the sealing head 33 is the same as that of the connecting hole 31. When the sealing plate 32 abuts against the side wall of the vacuum groove 30, the end face of the sealing head 33 is in the same plane as the cavity wall of the lower mold 3. A fourth cylinder 34 for sliding the sealing plate 32 is installed in the vacuum groove 30. The piston rod of the fourth cylinder 34 is connected to the sealing plate 32. A sealing gasket is adhered to the side of the sealing plate 32 near the cavity of the lower mold 3.

[0049] The implementation principle of a vacuum injection molding structure in this application embodiment is as follows: After the upper mold 2 and the lower mold 3 are closed, the sealing ring 8 seals the connection between the upper mold 2 and the lower mold 3. Then, the vacuum pump 5 is used to evacuate the cavity formed by the upper mold 2 and the lower mold 3 for injection molding. The two limiting plates 20 abut against the upper outer frame 6 and the lower outer frame 7 respectively. After injection molding, the injection liquid inside the cavity is vibrated up and down by the vibrator to discharge any leaked or residual air bubbles in the cavity formed by the upper mold 2 and the lower mold 3. This reduces the possibility of air bubbles forming inside the product, reduces the impact of air on the injection molded product, and improves the quality of the product.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A vacuum injection molding structure, comprising a base (1), an upper mold (2), and a lower mold (3), characterized in that: The lower mold (3) is provided with a vacuum tube (4) communicating with the cavity of the lower mold (3). The base (1) is provided with a vacuum pump (5), which is connected to the vacuum tube (4). The base (1) is provided with an upper outer frame (6), and the upper mold (2) is located inside the upper outer frame (6). The base (1) is provided with a lower outer frame (7), and the lower mold (3) is located inside the lower outer frame (7). The upper outer frame (6) is provided with a sealing element for sealing the connection between the upper mold (2) and the lower mold (3). The upper mold (2) is provided with a collection cavity (13) for collecting bubbles, and the collection cavity (13) is connected to the cavity of the upper mold (2); The base (1) is provided with an exhaust assembly for discharging air bubbles formed in the cavity of the upper mold (2) and lower mold (3) after injection molding. The exhaust assembly includes a vibrator (9) disposed at the bottom of the lower outer frame (7). The base (1) is provided with a braking component for stationary placement of the lower mold (3). The braking component includes a first braking plate (14) slidably disposed on the base (1) and located below the lower mold (3). The sliding direction of the first braking plate (14) is vertical. A second braking plate (16) located above the upper mold (2) is slidably disposed in a second placement groove (28) opened on the mounting plate (11). The sliding direction of the second braking plate (16) is vertical. When the second braking plate (16) is fully moved to the second placement groove (28)... When the first brake plate (14) is in contact with the lower outer frame (7) at the bottom of the lower mold (3), the second brake plate (16) is in contact with the upper outer frame (6) at the top of the upper mold (2); the first brake plate (14) has a clearance groove (27) for placing the vibrator (9), and when the first brake plate (14) is in contact with the lower outer frame (7), the vibrator (9) is placed in the clearance groove (27) of the first brake plate (14); The base (1) is provided with a connecting member for preventing the separation of the upper mold (2) and the lower mold (3). The connecting member includes a connecting plate (18) slidably disposed on the base (1). The connecting plate (18) slides away from or towards the lower mold (3). A sliding plate (19) is slidably disposed on the connecting plate (18). The sliding direction of the sliding plate (19) is vertical. Two limiting plates (20) are provided on the sliding plate (19). The two limiting plates (20) abut against the upper outer frame (6) at the top of the upper mold (2) and the lower outer frame (7) at the bottom of the lower mold (3) on both sides respectively. Limiting springs (21) are provided at both ends of the sliding plate (19). One end of the limiting spring (21) is connected to the sliding plate (19), and the other end is connected to the connecting plate (18). The upper mold (2) is provided with ejector pins (23), and the lower mold (3) is provided with a limiting groove (24) for inserting ejector pins (23); both limiting plates (20) are provided with inclined surfaces on opposite sides, and the distance from the side of the inclined surface away from the sliding plate (19) to the middle of the sliding plate (19) is greater than the distance from the side of the inclined surface close to the sliding plate (19) to the middle of the sliding plate (19); A first vibration spring (10) is provided between the bottom of the lower outer frame (7) and the base (1). One end of the first vibration spring (10) is connected to the lower outer frame (7) and the other end is connected to the base (1). An installation plate (11) for installing the upper mold (2) is provided on the base (1). A second vibration spring (12) is provided between the upper outer frame (6) and the installation plate (11). One end of the second vibration spring (12) is connected to the upper outer frame (6) and the other end is connected to the installation plate (11).

2. The vacuum injection molded structure according to claim 1, characterized in that, The sealing element includes a sealing ring (8) disposed on the upper outer frame (6), and a sealing groove (35) is provided on the lower outer frame (7), and the sealing ring (8) is inserted into the sealing groove (35).

3. The vacuum injection molding structure according to claim 1, characterized in that, Both the first vibration spring (10) and the second vibration spring (12) are fitted with telescopic rods (22).

4. The vacuum injection molded structure according to claim 1, characterized in that, The base (1) is provided with a first cylinder (15) for driving the first brake plate (14) to slide, and the mounting plate (11) is provided with a second cylinder (17) for driving the second brake plate (16) to slide. When the first brake plate (14) abuts against the bottom of the lower mold (3), the second brake plate (16) abuts against the top of the upper mold (2).

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