A glass bottle processing blow molding forming process

Abstract

This invention provides a glass bottle blow molding process, relating to the field of glass bottle processing technology, including the following steps: Step 1: Pour glass raw materials into a furnace, and then raise the internal temperature of the furnace to 1550℃-1600℃ to fully melt the glass raw materials; Step 2: Cut the melted material and drip the cut material into a preliminary mold for blow molding to form a bottle preform; Step 3: Transfer the bottle preform to a blow molding machine for blow molding; Step 4: Send the formed glass bottle into a heating furnace, and then heat the formed glass bottle to 570℃-590℃, followed by sending the glass bottle into an annealing furnace for cooling for 80-130 minutes; Step 5: Spray-coate and electroplate the cooled glass bottle to improve its aesthetics and corrosion resistance, which can reduce the probability of uneven thickness at the bottom of the formed glass bottle.

Description

Technical Field

[0001] This invention relates to the field of glass bottle processing technology, specifically to a glass bottle blow molding process. Background Technology

[0002] Glass bottles are a type of transparent product widely used as packaging containers. They have a long history and diverse uses. The main characteristics of glass bottles include high transparency, easy cleaning, good chemical stability, no contamination of contents, high airtightness, and excellent storage performance. They can be sealed with caps or stoppers to hold various materials in measured quantities, such as beverages, wines, chemicals, pharmaceuticals, stationery, and cosmetics. In the glass bottle manufacturing process, glass bottles are usually formed by blow molding using the pressure blow method.

[0003] For example, Chinese patent disclosure: A glass bottle extrusion molding machine that can reduce defective products, application number: CN202322087281.6, includes a mechanical base, a horizontal moving pair, a motion mechanism, a vertical moving pair, a fixed bracket, an air blowing device, a mold, and an upper mold, etc.; the mold is slidably connected to the middle of the upper part of the mechanical base, the upper mold is connected to the mechanical base and is directly above the mold, the horizontal moving pair is slidably connected to the upper part of the mechanical base, the motion mechanism is connected to the upper part of the horizontal moving pair, the vertical moving pair is connected to the left side of the horizontal moving pair, and the fixed bracket is slidably connected to the front of the vertical moving pair. The gear and rack are driven by a rotary motor to move, thereby driving the horizontal moving pair to reciprocate, so that the air outlet of the air blowing device and the blow mold opening are on the same horizontal plane.

[0004] However, in the above technical solution, when blow molding the glass bottle, it is necessary to insert an air blowing tube into the bottle preform and then use the air blowing tube to send compressed air into the bottle preform, so that the bottle preform gradually increases in size and is blow molded. However, during the molding process, the bottom of the glass bottle will gradually move away from the air outlet of the air blowing tube, causing a huge change in the distance between the air outlet of the air blowing tube and the bottom of the glass bottle. This results in uneven distribution of blow molding air pressure at the bottom of the bottle due to the change in distance, increasing the probability of uneven thickness of the bottom of the bottle. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a blow molding process for glass bottles. This process effectively solves the problem in the prior art where, when blow molding glass bottles, an air blowing tube is inserted into the preform, and compressed air is then delivered into the preform to gradually enlarge it for blow molding. However, during the molding process, the bottom of the glass bottle gradually moves away from the air outlet of the air blowing tube, causing a significant change in the distance between the air outlet and the bottom of the glass bottle. This results in uneven distribution of blow molding air pressure at the bottom of the bottle due to the distance variation, increasing the probability of inconsistent bottle bottom thickness.

[0006] To achieve the above objectives, the present invention provides a glass bottle blow molding process, comprising the following steps: Step 1: Pour the glass raw material into the furnace, and then raise the internal temperature of the furnace to 1550℃-1600℃ to fully melt the glass raw material; Step 2: Cut the melted material and drip the cut material into the initial mold for downblown shaping to form a preform; Step 3: Transfer the preform to the blow molding machine for blow molding; Step 4: Place the formed glass bottle into a heating furnace, then heat the formed glass bottle to 570℃-590℃, and then place the glass bottle into an annealing furnace to cool for 80-130 minutes. Step 5: Spray and electroplat the cooled glass bottles to improve their appearance and corrosion resistance.

[0007] Preferably, the blow molding machine includes a blow molding machine base, on which two support plates are provided. A top plate is provided on the support plates, and a plurality of first hydraulic rods are provided on the top plate. A lifting column is provided on the first hydraulic rod, and an air pump and an air blowing pipe are provided on the lifting column. A second hydraulic rod is provided on one side of the two support plates that are close to each other, and a mold is provided on the second hydraulic rod. A central control screen is provided on one side of the support plates.

[0008] Preferably, the air blowing pipe includes an air blowing pipe body, an air volume monitoring instrument on the air blowing pipe body, an extension blowing pipe on one side of the air blowing pipe body, an internally threaded pipe on the extension blowing pipe, and threads on the outer wall of the extension blowing pipe.

[0009] Preferably, the outer wall of the internally threaded pipe is provided with a toothed ring, a gear is provided on one side of the toothed ring, a rotating column is provided on the gear, and a motor is provided on the rotating column.

[0010] Preferably, the main body of the air blowing pipe is fixedly connected to the air pump, the extended blowing pipe is slidably connected to the lifting column, and the internally threaded pipe is rotatably connected to the lifting column.

[0011] Preferably, the gear ring meshes with the gear, the motor is fixedly mounted on the lifting column, and the air volume monitor, the motor, and the central control screen are electrically connected.

[0012] Preferably, the extended blowpipe includes an extended blowpipe body, and a groove is provided on the side of the extended blowpipe body near the blowpipe body, and a connecting pipe is slidably disposed in the groove.

[0013] Preferably, the outer wall of the connecting pipe is provided with a plurality of guide limiting grooves and a sealing layer, and a guide limiting block is slidably disposed in the guide limiting groove.

[0014] Preferably, the extended blowpipe body is slidably connected to the lifting column, and the connecting pipe is fixedly connected to the blowpipe body.

[0015] Preferably, the guide limiting block is fixedly connected to the extension blowpipe body.

[0016] This invention provides a blow molding process for glass bottles. It offers the following advantages: This invention first opens the mold using a second hydraulic rod, then places the preform into the mold. The mold then closes using the second hydraulic rod, followed by a first hydraulic rod that moves a lifting column towards the mold, bringing the column into contact with it. At this point, one end of the extended blowpipe is inserted into the preform. An air pump then blows air into the preform through the blowpipe and the extended blowpipe. An airflow monitor tracks the airflow rate in the blowpipe. The central control screen then starts the motor, which drives a gear via a rotating column. The gear drives a gear ring, which in turn drives a threaded tube. The threaded tube and threads then move the extended blowpipe towards the bottom of the glass bottle. The movement distance of the extended blowpipe is controlled based on the airflow rate in the blowpipe, ensuring it follows the bottom of the bottle. This reduces the variation in distance between the blowpipe outlet and the bottom of the bottle, resulting in more uniform blow molding pressure and lowering the probability of uneven bottle bottom thickness after molding. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the air blowing pipe in this invention; Figure 3 This is a schematic diagram of the extended blowpipe structure in this invention; Figure 4 In this invention Figure 3 A magnified structural diagram at point A.

[0018] The components include: 1. Blow molding machine base; 2. Support plate; 3. Top plate; 4. First hydraulic rod; 5. Lifting column; 6. Air pump; 7. Blowing pipe; 701. Blowing pipe body; 702. Air volume monitor; 703. Extension blowing pipe; 70301. Extension blowing pipe body; 70302. Slide groove; 70303. Connecting pipe; 70304. Guide limiting slide groove; 70305. Sealing layer; 70306. Guide limiting block; 704. Internal threaded pipe; 705. Thread; 706. Gear ring; 707. Gear; 708. Rotating column; 709. Motor; 8. Second hydraulic rod; 9. Mold forming; 10. Central control screen. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: This invention provides a glass bottle blow molding process, including the following steps: Step 1: Pour the glass raw material into the furnace, and then raise the internal temperature of the furnace to 1550℃ to fully melt the glass raw material; Step 2: Cut the melted material and drip the cut material into the initial mold for downblown shaping to form a preform; Step 3: Transfer the preform to the blow molding machine for blow molding; Step 4: Place the formed glass bottle into a heating furnace, heat the formed glass bottle to 570°C, and then place the glass bottle into an annealing furnace to cool for 80 minutes. Step 5: Spray and electroplat the cooled glass bottles to improve their appearance and corrosion resistance.

[0021] like Figure 1 As shown, the blow molding machine includes a blow molding machine base 1, two support plates 2 are provided on the blow molding machine base 1, a top plate 3 is provided on the support plate 2, a plurality of first hydraulic rods 4 are provided on the top plate 3, a lifting column 5 is provided on the first hydraulic rod 4, an air pump 6 and an air blowing pipe 7 are provided on the lifting column 5, a second hydraulic rod 8 is provided on the side of the two support plates 2 that are close to each other, a mold forming 9 is provided on the second hydraulic rod 8, and a central control screen 10 is provided on one side of the support plate 2.

[0022] like Figure 2 As shown, the air blowing pipe 7 includes an air blowing pipe body 701, an air volume monitoring instrument 702 on the air blowing pipe body 701, an extension blowing pipe 703 on one side of the air blowing pipe body 701, an internally threaded pipe 704 on the extension blowing pipe 703, and a thread 705 on the outer wall of the extension blowing pipe 703. The outer wall of the internally threaded tube 704 is provided with a toothed ring 706, a gear 707 is provided on one side of the toothed ring 706, a rotating column 708 is provided on the gear 707, and a motor 709 is provided on the rotating column 708.

[0023] With the above technical solution, when it is necessary to blow mold the preform in the mold 9 through the air blowing pipe 7, the air pump 6 is first started. The air pump 6 blows air into the preform through the air blowing pipe body 701 and the extended air blowing pipe 703. During the above process, when air is blown into the preform through the air blowing pipe body 701, the air flow rate in the air blowing pipe body 701 is monitored by the air volume monitoring instrument 702. Then, the central control screen 10 starts the motor 709. The motor 709 drives the gear 707 to rotate through the rotating column 708. The gear 707 drives the gear... When ring 706 rotates, the toothed ring 706 drives the internal threaded tube 704 to rotate. Then, through the internal threaded tube 704 and thread 705, the extension blowpipe 703 moves towards the bottom of the glass bottle. The moving distance of the extension blowpipe 703 is controlled according to the air flow in the main body of the blowpipe 701, so that the extension blowpipe 703 moves with the bottom of the glass bottle. This reduces the variation in the distance between the air outlet of the extension blowpipe 703 and the bottom of the glass bottle, making the blow molding air pressure more uniform and reducing the probability of uneven thickness at the bottom of the glass bottle after molding.

[0024] like Figure 3 and Figure 4 As shown, the extended blowpipe 703 includes an extended blowpipe body 70301, and a sliding groove 70302 is provided on the side of the extended blowpipe body 70301 near the blowpipe body 701. A connecting pipe 70303 is slidably disposed in the sliding groove 70302. The outer wall of the connecting pipe 70303 is provided with a plurality of guide limiting grooves 70304 and a sealing layer 70305, and a guide limiting block 70306 is slidably disposed in the guide limiting groove 70304.

[0025] With the above technical solution, when the extension blowpipe body 70301 moves, the direction of movement of the extension blowpipe body 70301 is controlled by the guide limiting slide groove 70304 and the guide limiting block 70306, while preventing the extension blowpipe body 70301 from moving too far, causing the extension blowpipe body 70301 to detach from the connecting pipe 70303, and sealing is achieved by the sealing layer 70305.

[0026] Example 2: This invention provides a glass bottle blow molding process, including the following steps: Step 1: Pour the glass raw material into the furnace, and then raise the internal temperature of the furnace to 1575℃ to fully melt the glass raw material; Step 2: Cut the melted material and drip the cut material into the initial mold for downblown shaping to form a preform; Step 3: Transfer the preform to the blow molding machine for blow molding; Step 4: Place the formed glass bottle into a heating furnace, then heat the formed glass bottle to 580°C, and then place the glass bottle into an annealing furnace to cool for 105 minutes. Step 5: Spray and electroplat the cooled glass bottles to improve their appearance and corrosion resistance.

[0027] Example 3: This invention provides a glass bottle blow molding process, including the following steps: Step 1: Pour the glass raw material into the furnace, and then raise the internal temperature of the furnace to 1600℃ to fully melt the glass raw material; Step 2: Cut the melted material and drip the cut material into the initial mold for downblown shaping to form a preform; Step 3: Transfer the preform to the blow molding machine for blow molding; Step 4: Place the formed glass bottle into a heating furnace, then heat the formed glass bottle to 590°C, and then place the glass bottle into an annealing furnace to cool for 130 minutes. Step 5: Spray and electroplat the cooled glass bottles to improve their appearance and corrosion resistance.

[0028] Working principle: The invention first opens the mold 9 using the second hydraulic rod 8, then places the preform into the mold 9. Next, the second hydraulic rod 8 closes the mold 9. Then, the first hydraulic rod 4 moves the lifting column 5 towards the mold 9, bringing it into contact with the mold 9. At this point, one end of the extended blowpipe body 70301 is inserted into the preform. Subsequently, the air pump 6 blows air into the preform through the blowpipe body 701 and the extended blowpipe 703. The airflow rate in the blowpipe body 701 is monitored by the airflow monitor 702. Finally, the central control screen 10 starts the motor 709, which rotates the column 70... 8 drives gear 707 to rotate, gear 707 drives gear ring 706 to rotate, gear ring 706 drives internal thread tube 704 to rotate, and then through internal thread tube 704 and thread 705, the extension blow tube 703 moves towards the bottom of the glass bottle. The moving distance of the extension blow tube 703 is controlled according to the air flow in the main body of the blow tube 701, so that the extension blow tube 703 moves with the bottom of the glass bottle, thereby reducing the variation in the distance between the air outlet of the extension blow tube 703 and the bottom of the glass bottle, making the blow molding air pressure more uniform and reducing the probability of uneven thickness of the bottom of the glass bottle after molding.

[0029] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A glass bottle blow molding process, characterized in that: Includes the following steps: Step 1: Pour the glass raw material into the furnace, and then raise the internal temperature of the furnace to 1550℃-1600℃ to fully melt the glass raw material; Step 2: Cut the melted material and drip the cut material into the initial mold for downblown shaping to form a preform; Step 3: Transfer the preform to the blow molding machine for blow molding; Step 4: Place the formed glass bottle into a heating furnace, then heat the formed glass bottle to 570℃-590℃, and then place the glass bottle into an annealing furnace to cool for 80-130 minutes. Step 5: Spray-coating and electroplating the cooled glass bottles to improve their appearance and corrosion resistance; The blow molding machine includes a blow molding machine base (1), two support plates (2) are provided on the blow molding machine base (1), a top plate (3) is provided on the support plate (2), a plurality of first hydraulic rods (4) are provided on the top plate (3), a lifting column (5) is provided on the first hydraulic rod (4), an air pump (6) and an air blowing pipe (7) are provided on the lifting column (5), a second hydraulic rod (8) is provided on one side of the two support plates (2) that are close to each other, a mold forming (9) is provided on the second hydraulic rod (8), and a central control screen (10) is provided on one side of the support plate (2). The air blowing pipe (7) includes an air blowing pipe body (701), an air volume monitor (702) on the air blowing pipe body (701), an extension air blowing pipe (703) on one side of the air blowing pipe body (701), an internally threaded pipe (704) on the extension air blowing pipe (703), and a thread (705) on the outer wall of the extension air blowing pipe (703). The extended blowpipe (703) includes an extended blowpipe body (70301), and a groove (70302) is provided on the side of the extended blowpipe body (70301) near the blowpipe body (701). A connecting pipe (70303) is slidably disposed in the groove (70302). The movement distance of the extension blowpipe (703) is controlled according to the air flow in the main body (701) of the blowpipe, so that the extension blowpipe (703) moves with the bottom of the glass bottle, thereby reducing the variation of the distance between the air outlet of the extension blowpipe (703) and the bottom of the glass bottle, making the blow molding air pressure more uniform and reducing the probability of uneven bottom thickness after the glass bottle is formed.

2. The glass bottle blow molding process according to claim 1, characterized in that: The outer wall of the internally threaded tube (704) is provided with a toothed ring (706), a gear (707) is provided on one side of the toothed ring (706), a rotating column (708) is provided on the gear (707), and a motor (709) is provided on the rotating column (708).

3. The glass bottle blow molding process according to claim 2, characterized in that: The main body of the air blowing pipe (701) is fixedly connected to the air pump (6), the extended blowing pipe (703) is slidably connected to the lifting column (5), and the internal threaded pipe (704) is rotatably connected to the lifting column (5).

4. The glass bottle blow molding process according to claim 3, characterized in that: The gear ring (706) meshes with the gear (707), the motor (709) is fixedly installed on the lifting column (5), and the air volume monitor (702), the motor (709) and the central control screen (10) are electrically connected.

5. The glass bottle blow molding process according to claim 4, characterized in that: The outer wall of the connecting pipe (70303) is provided with a plurality of guide limiting grooves (70304) and a sealing layer (70305), and a guide limiting block (70306) is slidably disposed in the guide limiting groove (70304).

6. The glass bottle blow molding process according to claim 5, characterized in that: The extended blowpipe body (70301) is slidably connected to the lifting column (5), and the connecting pipe (70303) is fixedly connected to the blowpipe body (701).

7. The glass bottle blow molding process according to claim 6, characterized in that: The guide limiting block (70306) is fixedly connected to the extension blowpipe body (70301).

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