Die feeding assembly of hot bending machine

Abstract

A die feeding assembly of a hot bending machine comprises a bottom plate, and a die pushing assembly and a box body assembly are arranged on the bottom plate. The box body assembly comprises a mold feeding box, a partition plate for dividing the inner space of the mold feeding box into an upper mold feeding space and a lower mold feeding space is arranged in the mold feeding box, a mold connecting through hole is formed in the partition plate, and the upper mold feeding space is communicated with the lower mold feeding space through the mold connecting through hole; a vacuum box is arranged in the upper mold inlet space in a liftable manner, a square opening is formed in the lower part of the vacuum box, a liftable supporting plate is arranged in the lower mold inlet space, the supporting plate is in sealed connection with a partition plate at the mold connecting through hole after rising, and a closed space is defined by the supporting plate, the partition plate and the vacuum box; the air in the sealed space is pumped out, so that the interior of the vacuum box is in a vacuum state, then nitrogen is filled into the vacuum box, the vacuum state in the vacuum box is broken, the supporting plate can descend to be communicated with the space of the forming furnace, at the moment, nitrogen is still continuously filled into the box, no oxygen exists in the furnace, and the oxidation degree of the mold and internal parts is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of glass processing, specifically to a die feeding assembly for a hot bending machine. Background Technology

[0002] In modern industry, glass products are increasingly widely used, such as glass curtain walls and skylights in the construction industry, car windows and glass skylights in the automotive industry, and glass covers for mobile phones and tablets in the consumer electronics industry. Many of these glass products require hot bending processes to achieve specific curved shapes to meet different functional and design requirements. Early glass hot bending machines typically placed the mold on a platform, moved it to the furnace opening, and then directly pushed the mold into the furnace. This method has significant drawbacks: when the furnace door is opened, heat can easily escape, and a large amount of oxygen entering can oxidize the mold and internal components at high temperatures, affecting the mold's lifespan, increasing production costs, and reducing production efficiency.

[0003] To improve production efficiency and product quality, a glass hot bending forming machine is disclosed in patent document CN218372083U. The machine includes a base, a feeding mechanism, a preheating and slow cooling chamber, and a cooling section sequentially arranged on the base. The feeding mechanism includes a feeding bracket with a feeding cavity, a longitudinal mold pushing assembly, and a transverse mold pushing assembly. The feeding cavity is a hollow rectangular structure, closed on its rear and right sides, and connected to the main furnace cavity mold inlet on its left side. A second gate assembly capable of opening and closing the main furnace cavity mold inlet is located on the left side of the feeding cavity. A feeding cavity mold inlet is opened on the front side of the feeding cavity, and a first gate assembly capable of opening and closing the feeding cavity mold inlet is located on the front side of the feeding cavity. The first and second gate assemblies isolate the air exchange between the cavity and the outside environment, preventing external oxygen from entering the furnace.

[0004] However, when the longitudinal die pusher assembly pushes the mold into the feeding cavity, the first gate assembly opens, and there is still a brief air exchange between the cavity and the outside. This means that there is still some oxygen in the furnace at high temperature, which oxidizes the mold and internal parts under high temperature conditions. Summary of the Invention

[0005] The problem this invention aims to solve is that when a hot bending machine is used to bend a mold, the oxygen present in the furnace will oxidize the mold and the internal parts of the hot bending machine at high temperatures.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: a die-feeding assembly for a hot bending machine, comprising a base plate, on which a push-die assembly and a box assembly are provided; the box assembly includes a die-feeding box, in which a partition is provided to divide the space inside the die-feeding box into an upper die-feeding space and a lower die-feeding space, and a die-connecting through hole is provided on the partition to connect the upper die-feeding space and the lower die-feeding space; a vacuum box is provided in the upper die-feeding space with a square opening at the bottom; a liftable support plate is provided in the lower die-feeding space, and after the support plate is raised, it is sealed to the partition at the die-connecting through hole; the support plate, the partition, and the vacuum box together form a sealed space.

[0007] This solution involves pushing the mold into a tray in the mold box using a pusher assembly. The vacuum chamber inside the mold box then descends to cover the mold. At this point, the tray, partition, and vacuum chamber together form a sealed space. The air in the sealed space is extracted, creating a vacuum inside the vacuum chamber. Nitrogen is then introduced into the vacuum chamber to break the vacuum, allowing the tray to descend and connect with the molding furnace. Nitrogen continues to be introduced into the chamber during this process, ensuring that there is no oxygen inside the furnace and reducing the oxidation of the mold and internal components. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0009] Figure 2 This is a side view of an embodiment of the present utility model;

[0010] Figure 3 for Figure 2 Enlarged view of the middle BB side;

[0011] Figure 4 This is a schematic diagram of the structure after removing the mold release door panel in an embodiment of the present invention;

[0012] Figure 5 for Figure 1 Enlarged view of point A in the middle. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] like Figures 1 to 5As shown, a die-feeding assembly for a hot bending machine includes a base plate 1, on which a die-pushing assembly 2 and a housing assembly 3 are disposed. The housing assembly 3 includes a die-feeding box 31, in which a partition 4 is provided to divide the internal space of the die-feeding box 31 into an upper die-feeding space 301 and a lower die-feeding space 302. A die-connecting through hole 41 is provided on the partition 4, which connects the upper die-feeding space 301 and the lower die-feeding space 302. The upper die-feeding space 301 can... A vacuum box 32 is provided in the lifting position. The vacuum box 32 has an opening at the bottom. A liftable support plate 5 is provided in the lower mold space 302. After the support plate 5 is raised, it is sealed to the partition plate 4 at the mold receiving through hole 41. The support plate 5, the partition plate 4 and the vacuum box 32 together form a closed space. The mold pushing assembly 2 includes an inlet mold pushing assembly 21 and an outlet mold pushing assembly 22. The inlet mold pushing assembly 21 includes a transition mold pushing assembly 211 and an inlet mold pushing assembly 212.

[0015] During the mold-feeding operation, the mold is placed on the base plate 1. First, the mold is pushed onto the base plate 1, which is connected to the inlet of the mold-feeding box 31, by the transition mold-pushing assembly 211. Then, the mold is pushed onto the support plate 5 inside the mold-feeding box 31 by the mold-feeding pushing assembly 212. At this time, the support plate 5 is located at the mold-receiving through hole 41 and is sealed and connected to the partition plate 4. After the mold is on the support plate 5, the vacuum box 32 above the support plate 5 descends to cover the mold. At this time, the support plate 5, the partition plate 4, and the vacuum box 32 form a sealed space. Then, the air in the vacuum box 32 is extracted, making the vacuum box 32 a vacuum state. Then, nitrogen is filled into the vacuum box 32 to break the vacuum state of the vacuum box 32, so that the support plate 5 can descend. At this time, the support plate 5 and the mold are located in the lower mold-feeding space 302, which is connected to the molding furnace. Finally, the mold-feeding pushing assembly 22 pushes the mold into the molding furnace. Through the vacuuming and nitrogen filling operations, the air in the box is completely removed, reducing the oxidation of the mold and internal parts.

[0016] like Figure 1 and Figure 2 As shown, in this embodiment, the transition push mold assembly 211 includes a push mold slide rail 2111, which is disposed on the base plate 1. A push plate 2112 is slidably disposed on the push mold slide rail 2111. The mold entry push mold assembly 212 includes a mold entry cylinder 2121, and a cylinder fixing member 101 is disposed on the base plate 1. The mold entry cylinder 2121 is fixed above the base plate 1 by the cylinder fixing member 101. The slide of the mold entry cylinder 2121 is connected to a push mold bracket 2122. The box exit push mold assembly 22 includes a box exit cylinder 221 disposed on the mold entry box 31. A furnace entry push rod 222 is connected to the slide of the box exit cylinder 221. The furnace entry push rod 222 extends into the lower mold entry space 302 inside the mold entry box 31. A furnace entry push block 223 is connected to the furnace entry push rod 222.

[0017] The push-die slide rail 2111 can limit the movement direction of the push plate 2112, reduce the offset and shaking of the push plate 2112 during the sliding process, and ensure that the die can smoothly transition from one position to another, avoiding die damage or position deviation caused by unstable transmission, thus improving the stability and reliability of the entire hot bending machine. The cylinder, as a power source, precisely controls the moving distance and speed of the push-die bracket 2122 by controlling the air pressure and stroke of the cylinder, ensuring that the die can accurately enter the designated position in the die box, thus improving the accuracy and efficiency of die entry. In another embodiment, a linear motor can also be used as the power source.

[0018] like Figure 1 , Figure 2 and Figure 5 As shown, in this embodiment, a mold inlet 311 is provided on the side of the mold box 31 near the mold push assembly 2, and the mold inlet 311 is connected to the upper mold space 301; a first door plate cylinder 6 is provided on the mold box 31 and above the mold inlet 311, and a mold door plate 7 is connected to the piston rod of the first door plate cylinder 6; door plate pressing blocks 8 are provided on both the left and right sides of the mold inlet 311, and a guide groove 81 is provided on the side of the door plate pressing block 8 near the mold inlet 311, and the left and right sides of the mold door plate 7 are placed in the guide groove 81; The mold inlet gate 7 cooperates with the mold inlet 311. When the mold does not need to enter the mold inlet box, the first gate cylinder 6 drives the mold inlet gate 7 to descend, closing the mold inlet 311 and preventing external dust, debris and other foreign objects from entering the upper mold inlet space 301. This avoids these foreign objects from contaminating the mold or the mold processing process and ensures the cleanliness of the mold processing environment. The guide grooves 81 opened on the gate plate pressure blocks 8 on the left and right sides of the mold inlet 311 play a guiding role for the mold inlet gate 7, ensuring the stability and accuracy of the movement of the mold inlet gate 7.

[0019] like Figure 1 and Figure 4 As shown, in this embodiment, a first cylinder 9 is provided above the mold inlet box 31, and the piston rod of the first cylinder 9 extends into the mold inlet box 31 and connects to the vacuum box 32, thereby controlling the vacuum box 32 to move up and down within the upper mold inlet space 301; a second cylinder 10 is provided below the mold inlet box 31, and the piston rod of the second cylinder 10 extends into the mold inlet box 31 and connects to the bottom of the support plate 5, thereby controlling the support plate 5 to move up and down within the lower mold inlet space 302; when the mold is pushed by the mold inlet pusher assembly 21 When the mold is pushed into the upper mold space 301 of the mold box 31, the support plate 5 rises to the mold receiving hole 41. After the mold pushing assembly 212 pushes the mold onto the support plate 5, the vacuum box 32 located above the support plate 5 descends to cover the mold. A sealing ring 12 is provided on one side of the upper mold space 301 at the mold receiving hole 41. After the vacuum box 32 descends, the sealing ring 12 covers the opening edge below the vacuum box 32, so that the support plate 5, the partition plate 4 and the vacuum box 32 enclose a sealed space.

[0020] like Figure 2 and Figure 4 As shown, in this embodiment, a first air hole 312 is provided above the mold box 31, and a second air hole 321 is provided above the vacuum box 32. A gas guide pipe 11 is connected between the first air hole 312 and the second air hole 321, and the gas guide pipe 11 extends from the first air hole 312. After the vacuum box 32 covers the mold, the vacuum box 32, the partition plate 4 and the push plate 2112 form a sealed space. The air in the sealed space is drawn away through the gas guide pipe 11 to form a vacuum state. Then, nitrogen is filled into the sealed space through the gas guide pipe 11 to break the vacuum state. Subsequently, the support plate 5 descends. At this time, the mold is located in the lower mold space 302. The mold is pushed into the furnace by the mold ejection assembly 22. Through the operation of drawing a vacuum and then filling with nitrogen to break the vacuum, the oxygen content in the high-temperature furnace is extremely low, so that the mold and parts in the furnace will not be oxidized by high temperature.

[0021] like Figure 1 As shown, in this embodiment, an exit port 313 is provided on the side of the mold box 31 away from the exit mold push assembly 22, and the exit port 313 is connected to the lower mold space 302; a second door plate cylinder 13 is provided on the box above the exit port 313, and the output shaft of the second door plate cylinder 13 is connected to the exit door plate 14; during the hot bending process, the exit door plate 14 is closed, so that the temperature inside the furnace will not dissipate through the exit port, which helps to maintain the temperature stability inside the mold furnace, prevents heat loss, provides a stable temperature environment for the hot bending process, ensures the smooth progress of the hot bending process, and improves the forming quality of the product; at the same time, the sealed environment can also prevent external impurities from entering the hot bending furnace, avoiding contamination or damage to the workpiece or mold.

[0022] like Figure 1 As shown, in this embodiment, a mold entry limiting plate 15 is provided on the base plate 1 in front of the mold inlet 311, and a mold entry stop 16 is provided on the side of the base plate 1 opposite to the mold entry limiting plate 15. The mold entry limiting plate 15 and the mold entry stop 16 restrict the mold from moving randomly when it is pushed into the mold inlet box 31, and it can be pushed to the expected position.

[0023] The above structure forms a sealed space by enclosing the vacuum box 32, the partition 4, and the support plate 5. Before entering the furnace, the air in the sealed space is evacuated to create a vacuum state, and then nitrogen is introduced to break the vacuum state, so that the oxygen content in the space when the mold enters the furnace is extremely low. Nitrogen is continuously introduced during the process, so that the oxygen content in the furnace is also extremely low during the molding process, thus avoiding the high-temperature oxidation of the mold and furnace parts.

Claims

1. A heated bending machine's die entry assembly comprising a base plate (1), characterized in that: A push mold assembly (2) and a box assembly (3) are arranged on the base plate (1); The box assembly (3) comprises a mold feeding box (31), a partition plate (4) is arranged in the mold feeding box (31) and divides the space in the mold feeding box (31) into an upper mold feeding space (301) and a lower mold feeding space (302), a mold feeding through hole (41) is arranged on the partition plate (4), and the mold feeding through hole (41) communicates the upper mold feeding space (301) and the lower mold feeding space (302); A vacuum box (32) is arranged in the upper mold feeding space (301) and can be lifted, and the vacuum box (32) is open at the lower portion; A supporting plate (5) is arranged in the lower mold feeding space (302) and can be lifted, the supporting plate (5) is sealingly connected with the partition plate (4) at the mold feeding through hole (41) after being lifted, and the supporting plate (5), the partition plate (4) and the vacuum box (32) form a closed space.

2. The heated bending machine die assembly of claim 1, wherein: The push mold assembly (2) comprises a box feeding push mold assembly (21) and a box discharging push mold assembly (22); the box feeding push mold assembly (21) comprises a transition push mold assembly (211) and a mold feeding push mold assembly (212).

3. The heated bending machine's die assembly of claim 2, wherein: The transition push mold assembly (211) comprises a push mold sliding rail (2111) arranged on the base plate (1), and a push plate (2112) is slidingly arranged on the push mold sliding rail (2111); The mold feeding push mold assembly (212) comprises a mold feeding cylinder (2121), a cylinder fixing piece (101) is arranged on the base plate (1), the mold feeding cylinder (2121) is fixed above the base plate (1) through the cylinder fixing piece (101), and a push mold support (2122) is connected to the sliding table of the mold feeding cylinder (2121).

4. The heated bending machine die assembly of claim 2, wherein: The box discharging push mold assembly (22) comprises a mold discharging cylinder (221) arranged on the mold feeding box (31), an oven feeding push rod (222) is connected to the sliding table of the mold discharging cylinder (221) and extends into the lower mold feeding space (302) in the mold feeding box (31), and an oven feeding push block (223) is connected to the oven feeding push rod (222).

5. The heated bending machine die assembly of claim 3, wherein: A mold feeding port (311) is arranged on one side of the mold feeding box (31) close to the mold feeding push mold assembly (212) and communicates with the upper mold feeding space (301), a first door plate cylinder (6) is arranged on the mold feeding box (31) and above the mold feeding port (311), a mold feeding door plate (7) is connected to the piston rod of the first door plate cylinder (6), and door plate pressing blocks (8) are arranged on the left and right sides of the mold feeding port (311), a guide groove (81) is arranged on the side of each door plate pressing block (8) close to the mold feeding port (311), and the left and right sides of the mold feeding door plate (7) are arranged in the guide grooves (81).

6. The heated-bender entry assembly of claim 1, wherein: A first cylinder (9) is arranged above the mold feeding box (31), the piston rod of the first cylinder (9) extends into the mold feeding box (31) and is connected with the vacuum box (32), so that the lifting movement of the vacuum box (32) in the upper mold feeding space (301) is controlled. A second cylinder (10) is arranged below the mold feeding box (31), the piston rod of the second cylinder (10) extends into the mold feeding box (31) and is connected with the bottom of the supporting plate (5), so as to control the lifting movement of the supporting plate (5) in the lower mold feeding space (302).

7. The heated-bender entry assembly of claim 6, wherein: A first air hole (312) is arranged above the mold feeding box (31), a second air hole (321) is arranged above the vacuum box (32), and a gas guide pipe (11) is connected between the first air hole (312) and the second air hole (321), and the gas guide pipe (11) extends from the first air hole (312).

8. The heated-bender entry assembly of claim 1, wherein: A sealing ring (12) is arranged at the side of the mold receiving through hole (41) in the upper mold feeding space (301), and after the vacuum box (32) is lowered, the sealing ring (12) can cover the opening edge below the vacuum box (32).

9. The heated-bender entry assembly of claim 4 wherein: A mold outlet (313) is arranged on the side of the mold feeding box (31) away from the mold outlet pushing assembly (22), the mold outlet (313) is communicated with the lower mold feeding space (302), a second door plate cylinder (13) is arranged on the box above the mold outlet (313), and the piston rod of the second door plate cylinder (13) is connected with a mold outlet door plate (14).

10. The heated bending machine die assembly of claim 5, wherein: A mold feeding limiting plate (15) is arranged on the bottom plate (1) in front of the mold feeding port, and a mold feeding stop bar (16) is arranged on the bottom plate (1) in parallel with the side opposite to the mold feeding limiting plate (15).

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