Auxiliary mechanism for plastic bottle production and using method thereof

Abstract

The invention relates to the technical field of plastic bottle production, and discloses an auxiliary mechanism for plastic bottle production and a using method of the auxiliary mechanism. The bottom of the cover is communicated with the outside, and side openings communicated with the outside are formed in the two sides of the cover. The air inlet cylinder is fixed to the middle of the surface of the cover, an upper cover is fixed to the upper portion of the air inlet cylinder, an air inlet pipe communicated with the interior of the air inlet cylinder is connected to the upper portion of the upper cover, an air port communicated with the interior of the cover is formed in the surface, below the air inlet cylinder, of the cover, and side air pipes communicated with the interior of the cover are obliquely connected to the two sides of the cover. An outlet of the side air pipe inclines towards the side opening. According to the bottle blowing machine, the cover can cover the conveying belt between the bottle preform preheating chamber and the bottle blowing machine, hot air in the preheating chamber can be sucked into the cover, and in cooperation with the reflection effect of the mirror surface coating on heat radiation, a bottle preform preheated in the cover is subjected to a good heat preservation effect, meanwhile, dust can be avoided, and the later bottle blowing quality is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of plastic bottle production, in particular to an auxiliary mechanism for plastic bottle production and a use method thereof. Background Art

[0002] Plastic bottles are widely used packaging containers made of various plastic materials, such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), etc. They are light, durable and low cost, and are often used in the packaging of beverages, condiments, cosmetics and personal care products. Plastic bottles have excellent sealing and transparency, which is convenient for consumers to observe and carry.

[0003] Plastic bottles are produced by using a blow molding machine through the prepared preforms. The process includes: placing the preheated plastic preforms in the blow mold, blowing and stretching them into the desired shape of the bottle through high-pressure inflation. The blow molding machine is divided into two types: fully automatic and semi-automatic. The fully automatic blow molding machine is operated by a manipulator and is more efficient. The temperature, pressure, time and other parameters must be strictly controlled throughout the process to ensure product quality. Before the plastic bottles are produced by the blow molding machine, they are usually preheated by infrared heaters or high-temperature lamps. The preheating process heats the preforms to a temperature suitable for blow molding (generally between 80 and 120 degrees Celsius), making them softened and plastic, which is convenient for subsequent blow molding. This step is crucial to ensure the quality and molding effect of plastic bottles.

[0004] During the process of transferring the preheated preform to the blow molding mold, it is easy to be exposed to the air and cooled, especially when the ambient temperature is relatively low. In addition, there are problems such as dust and impurities being stained during the transfer process, which affects the quality of the blow molding. Therefore, we propose an auxiliary mechanism for plastic bottle production and its use method. Summary of the invention

[0005] The purpose of the present invention is to provide an auxiliary mechanism for plastic bottle production and a method of using the same. By arranging a cover that can cover the top of the conveyor belt between the preform preheating chamber and the bottle blowing machine, the cover can absorb the hot air inside the preheating chamber and cooperate with the reflection effect of the mirror coating on the thermal radiation, so that the preform preheated inside the cover is better insulated and can avoid being stained with dust, thereby ensuring the quality of the subsequent bottle blowing, thereby solving the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an auxiliary mechanism for plastic bottle production and a method of using the same, comprising a cover, an air inlet cylinder, a hanging piece and a supporting piece; the bottom of the cover is connected to the outside, and both sides of the cover are provided with side ports connected to the outside; the air inlet cylinder is fixed to the middle position of the surface of the cover, an upper cover is fixed above the air inlet cylinder, an air inlet pipe connected to the inside of the air inlet cylinder is connected to the upper cover, an air port connected to the inside of the cover is opened on the surface of the cover below the air inlet cylinder, side air pipes connected to the inside of the cover are obliquely connected to both sides of the cover, and the outlets of the side air pipes are inclined toward the side ports; the hanging piece comprises a vertical rod and a vertical tube; the vertical rod is fixed to the two side surfaces of the cover, and the vertical tube is slidably mounted on the vertical rod through the rod hole at its bottom The outer ring of the vertical tube, and the lower side surface of the vertical tube is screwed with a first locking bolt, the end of the first locking bolt penetrates into the interior of the vertical tube and contacts the outer surface of the vertical rod, a mounting plate is fixed to the top of the vertical tube, and the outer ring of the surface of the mounting plate is evenly provided with through mounting holes; the support member comprises a support tube, a support rod and a connecting rod; the connecting rod is provided with two and is laterally welded and fixed to the two side surfaces of the side edges of the cover, and a sleeve is welded and fixed to the end of the connecting rod, and the support rod can be slidably inserted into the support tube below, and a second locking bolt is screwed on the upper side of the support tube, the second locking bolt penetrates into the interior of the support tube and contacts the outer surface of the support rod, a horizontal plate is fixed on the upper side of the support rod, and a plug rod is vertically fixed on the surface of the horizontal plate, the diameter of the plug rod is smaller than the inner diameter of the sleeve, and the height of the plug rod is greater than the height of the sleeve.

[0007] By adopting the above technical scheme, the cover is placed above the conveyor belt between the preheating chamber and the bottle blowing mold by hoisting or supporting. The hot air inside the preheating chamber can be sucked into the cover, so that the preheated bottle embryo passes through the inside of the cover during the transmission from the conveyor belt to the bottle blowing mold of the bottle blowing machine, which has the effect of heat preservation and dust prevention for the bottle embryo, thereby ensuring the quality of the finished plastic bottle after the final blowing.

[0008] As a preferred embodiment of the present invention, brushes are arranged on both side surfaces of the bottom of the cover, and the brushes on both sides are arranged in an alternating manner.

[0009] By adopting the above technical solution, when the cover is placed above the conveyor belt, the brush contacts the base surface of the conveyor belt, thereby protecting the bottom part from dust.

[0010] As a preferred embodiment of the present invention, two sleeves of the same size are fixed to the end of the connecting rod, and two plug rods of the same size are fixed to the surface of the cross plate.

[0011] By adopting the above technical solution, the two insertion rods are inserted into the two sleeves, so that the support for the cover is more stable.

[0012] As a preferred embodiment of the present invention, the air inlet cylinder below the upper cover is filled with filter cotton, and the filter cotton support is placed above the baffle net fixed inside the air port.

[0013] By adopting the above technical solution, the filter cotton can filter the incoming hot air and prevent dust from entering.

[0014] As a preferred embodiment of the present invention, a screw block is provided below the upper cover, and the screw block is screwed into the upper inner part of the air intake cylinder to realize the detachable installation of the upper cover.

[0015] By adopting the above technical solution, after being used for a period of time, the upper cover and the screw block can be rotated and removed, so that the filter cotton can be replaced easily.

[0016] As a preferred embodiment of the present invention, a slider is fixed to the top end of the vertical rod, the slider can be slidably placed in the vertical tube, and the size of the slider is larger than the size of the rod hole.

[0017] By adopting the above technical solution, the sliding block can not only play a role in guiding the vertical rod to slide stably inside the vertical tube, but also prevent the vertical rod from sliding out of the vertical tube.

[0018] As a preferred embodiment of the present invention, the inner wall surface of the cover is provided with a mirror coating, and the mirror coating is evenly distributed on the inner surface of the cover.

[0019] By adopting the above technical solution, the mirror coating has the function of reflecting heat radiation, thereby further improving the heat preservation effect of the cover.

[0020] As a preferred embodiment of the present invention, a support plate is fixed to the bottom of the support tube, and the support tube is fixed at a middle position of the surface of the support tube.

[0021] By adopting the above technical solution, the support tube is stably supported on the ground by a support plate with a larger area.

[0022] As a preferred embodiment of the present invention, the following steps are included:

[0023] Step 1: According to the on-site environment in the workshop, when the hoisting conditions are met, the cover is hoisted and fixed through the hoisting parts, and the height of the hoisting parts is adjusted so that the cover can be just above the conveyor belt between the preheating chamber and the blow molding machine mold. Conversely, the cover is supported and installed through the support parts, and the height of the support parts is also adjusted so that the cover can be just above the conveyor belt between the preheating chamber and the blow molding machine mold.

[0024] Step 2: Use a hose to connect between the preheating chamber and the air inlet pipe, and set the blower so that its air outlet is connected to the side air pipes on both sides through the hose;

[0025] Step 3: The blower works to blow air out from the side port to the outside, forcing the hot air inside the preheating chamber to enter the cover from the hose and the air inlet, and the impurities are filtered out by the filter cotton. The air flow is blown out to prevent dust from entering the cover;

[0026] Step 4: The preheated preform is transported from the preheating chamber to the blowing mold via a conveyor belt, and passes through the inner side of the cover. The hot air entering the cover and the reflection of the heat radiation by the mirror coating play a role in keeping the preheated preform warm.

[0027] Step 5: There is an outward airflow inside the cover, and the bottom of the cover is blocked by the brush, which can prevent external dust from entering the inside of the cover, thereby achieving the purpose of dust prevention.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The auxiliary mechanism for plastic bottle production of the present invention and the method of using the same can cover the conveyor belt between the preform preheating chamber and the bottle blowing machine by setting a cover. The cover can absorb the hot air in the preheating chamber and cooperate with the reflection effect of the mirror coating on the heat radiation, so that the preform preheated in the cover can be better insulated and dust can be avoided, thereby ensuring the quality of the subsequent bottle blowing.

[0030] 2. The auxiliary mechanism for plastic bottle production of the present invention and the method of using the same, by setting two installation methods of hoisting and supporting installation, the heights of the hoisting and supporting installation can be conveniently adjusted, and during use, the appropriate installation and fixing method can be flexibly selected according to the on-site environment.

[0031] 3. The auxiliary mechanism for plastic bottle production of the present invention and the method of using the same are provided with replaceable filter cotton placed in the air inlet, which can filter the hot air entering the interior of the cover and facilitate the subsequent replacement of the filter cotton.

[0032] 4. The auxiliary mechanism for plastic bottle production of the present invention and its use method are characterized in that staggered brushes are evenly arranged on the bottom of the cover. When the cover is placed above the conveyor belt, the brushes on the bottom are staggered and abut against the base surface of the conveyor belt, thereby blocking dust from the bottom. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0034] Figure 1 It is a schematic diagram of the overall structure of the auxiliary mechanism for plastic bottle production and the use method thereof of the present invention;

[0035] Figure 2 It is a schematic diagram of the supporting structure of the auxiliary mechanism for plastic bottle production and the use method thereof of the present invention;

[0036] Figure 3 It is a detailed structural schematic diagram of the air inlet of the auxiliary mechanism for plastic bottle production and the use method thereof of the present invention;

[0037] Figure 4 The present invention is a schematic diagram of the connection structure of the vertical tube and the vertical rod of the auxiliary mechanism for plastic bottle production and the use method thereof.

[0038] In the figure: 1. cover; 11. mirror coating; 12. side port; 13. brush; 14. side air pipe; 2. air inlet cylinder; 21. upper cover; 211. air inlet pipe; 212. screw block; 22. filter cotton; 3. vertical rod; 31. vertical tube; 311. first locking bolt; 312. rod hole; 32. mounting plate; 321. mounting hole; 33. slider; 4. connecting rod; 41. sleeve; 5. support tube; 51. support rod; 52. horizontal plate; 521. plug rod; 53. second locking bolt; 54. support plate; 6. air port; 61. baffle. DETAILED DESCRIPTION

[0039] See also Figure 1-4 The present invention provides a technical solution: an auxiliary mechanism for plastic bottle production and a method of using the auxiliary mechanism, including a cover 1, an air inlet cylinder 2, a hanging member and a supporting member.

[0040] The bottom of the cover 1 is connected to the outside. When in use, the cover 1 is placed above the conveyor belt between the preform preheating chamber and the bottle blowing mold of the bottle blowing machine. Brushes 13 are provided on both sides of the bottom surface of the cover 1. The brushes 13 on both sides are arranged in an interlaced manner, and then the brushes 13 on both sides are made to contact the side surface of the base of the conveyor belt to achieve the purpose of dust protection for the bottom opening of the cover 1. Side ports 12 connected to the outside are provided on both sides of the cover 1. When the conveyor belt drives the preheated bottle preform to move, the bottle preform enters into the cover 1 through the side ports 12 and is also moved out of the cover 1 through the side ports 12.

[0041] In order to achieve the purpose of keeping the preforms warm after preheating, the air inlet cylinder 2 is fixed to the middle position of the surface of the cover 1, and an upper cover 21 is fixed above the air inlet cylinder 2, and a screw block 212 is arranged below the upper cover 21. The screw block 212 is screwed into the upper interior of the air inlet cylinder 2 to realize the detachable installation of the upper cover 21 inside the air inlet cylinder 2, and an air inlet pipe 211 connected to the interior of the air inlet cylinder 2 is connected above the upper cover 21. An air port 6 connected to the interior of the cover 1 is opened on the surface of the cover 1 below the air inlet cylinder 2, and a baffle 61 is fixed laterally inside the air port 6, and the baffle 61 is located in the upper position inside the air port 6. At the same time, the interior of the air inlet cylinder 2 below the upper cover 21 is filled with filter cotton 22, and the filter cotton 22 support is placed above the baffle 61 fixed inside the air port 6.

[0042] When in use, the air inlet pipe 211 is connected to the hose through the joint at the end thereof, and the other end of the hose is connected to the interior of the preheating chamber. The hot air inside the preheating chamber can enter the air inlet cylinder 2 through the hose, be filtered by the filter cotton 22 inside the air inlet cylinder 2 to remove impurities, and then enter the interior of the cover 1 from the air port 6, so that the interior of the cover 1 is in a warm state. When the preheated bottle embryo is transmitted and passes through the internal area of ​​the cover 1, it can be kept warm. In order to improve the insulation effect, the inner wall surface of the cover 1 is provided with a mirror coating 11. The mirror coating 11 is evenly distributed on the inner surface of the cover 1, which can reflect heat radiation and further improve the insulation effect.

[0043] Under natural conditions, it is difficult for the air inside the preheating chamber to enter the inside of the cover 1, and dust is easily introduced into the cover 1 from the side opening 12, resulting in that the preform cannot be well insulated and is easily stained with dust. In order to solve this problem, the present invention makes the two sides of the cover 1 connected obliquely with the side air pipe 14 connected to the inside of the cover 1, and the outlet of the side air pipe 14 is inclined toward the side opening 12. When in use, the air outlet of the blower is connected to the side air pipe 14 through a hose, and the side air pipe 14 blows air to the outside of the side openings 12 on both sides. According to the Bernoulli principle, the greater the flow rate, the smaller the air pressure, which reduces the air pressure at the side opening 12, and then it is easy to make the air in the middle position of the cover 1 flow toward the two side openings 12, so that the air pressure at the position of the air inlet 2 is reduced, so that the hot air inside the preheating chamber can be sucked into the cover 1 through the hose. In addition to realizing the smooth entry of hot air into the cover 1, since the two sides of the cover 1 are exhausted outward, external dust impurities cannot enter the cover 1 from the side opening 12, and the purpose of dust prevention for the preform can be achieved at the same time.

[0044] According to the on-site environment, the cover 1 can be hoisted and installed by a hoisting piece, which includes a vertical rod 3 and a vertical tube 31; the vertical rod 3 is fixed to the two side surfaces of the cover 1, and a rod hole 312 slightly larger than the vertical rod 3 is opened at the bottom of the vertical tube 31, so that the vertical tube 31 can be slidably sleeved on the outer ring of the vertical rod 3 through the rod hole 312 at the bottom thereof, and a slider 33 is fixed to the top end of the vertical rod 3, and the slider 33 can be slidably placed in the vertical tube 31, and the size of the slider 33 is larger than the size of the rod hole 312. When the vertical rod 3 slides inside the vertical tube 31, the slider 33 prevents the vertical rod 3 from sliding out of the vertical tube 3 1 can slide out from the inside to change the length of the hanging piece, which is convenient for adjusting the height of the hanging. A first locking bolt 311 is screwed on the lower side surface of the vertical cylinder 31. The end of the first locking bolt 311 penetrates into the inside of the vertical cylinder 31 and contacts the outer surface of the vertical rod 3 below the slider 33, so as to achieve the purpose of locking the length of the hanging piece. A mounting plate 32 is fixed on the top of the vertical cylinder 31. The outer circle of the surface of the mounting plate 32 is evenly provided with through mounting holes 321. Bolts are passed through the mounting holes 321 to lock the mounting plate 32 on the upper bracket to achieve the hanging and fixing of the cover 1.

[0045] According to the environment on site, the cover 1 can also be supported and installed by a support member, which includes a support tube 5, a support rod 51 and a connecting rod 4; the connecting rod 4 is provided with two and is horizontally welded and fixed to the side surfaces of the cover 1, and a sleeve 41 is welded and fixed at the end of the connecting rod 4, and the support rod 51 is slidably inserted into the support tube 5 below, and a horizontal plate 52 is fixed on the upper side of the support rod 51, and a plug rod 521 is vertically fixed on the surface of the horizontal plate 52, and the diameter of the plug rod 521 is smaller than the inner diameter of the sleeve 41, and the plug rod 5 The height of 21 is greater than the height of the sleeve 41. When the support rod 51 slides up and down inside the support tube 5, the support height of the cross plate 52 and the plug rod 521 can be changed. The upper side of the support tube 5 is screwed with a second locking bolt 53. When the second locking bolt 53 is tightened, it will penetrate into the inside of the support tube 5 and abut against the outer surface of the support rod 51, locking the height of the cross plate 52 and the plug rod 521. After that, the sleeve 41 can be sleeved on the outer circle of the plug rod 521 above the cross plate 52. Two sets of support members are set to achieve the support and installation of the cover 1.

[0046] A support plate 54 is fixed to the bottom of the support tube 5, and the support tube 5 is fixed to the middle position of the surface of the support tube 5, so that the support tube 5 is stably supported on the ground by the support plate 54 with a larger area at the bottom.

[0047] In order to provide more stable support to the cover 1 when the sleeve 41 is sleeved on the outer circle of the plug rod 521, two sleeves 41 of the same size are fixed to the end of the connecting rod 4, and two plug rods 521 of the same size are fixed to the surface of the cross plate 52. The spacing between adjacent sleeves 41 is equal to the spacing between adjacent plug rods 521. The two plug rods 521 above the cross plate 52 are inserted into the two sleeves 41 at the end of the connecting rod 4, so that the support stability obtained is higher.

[0048] When in use, when hoisting through the vertical rod 3 and its top structure, the mounting plate 32 is installed on the upper bracket through the mounting hole 321 through the bolt, and before installation, the first locking bolt 311 is loosened so that its end no longer contacts the surface of the vertical rod 3, and the vertical rod 3 can slide in the vertical tube 31 along with the slider 33 to change the total length of the vertical rod 3 and the vertical tube 31. Finally, the first locking bolt 311 is tightened to lock it, ensuring that when the mounting plate 32 is locked to the bottom of the bracket, the cover 1 can cover the conveyor belt between the preheating equipment and the bottle blowing mold, and the brush 13 contacts the side of the base of the conveyor belt to achieve the blocking below. Dust purpose; when it is necessary to use a support member for support installation, first loosen the second locking bolt 53 so that its end no longer contacts the outer surface of the support rod 51, and the support rod 51 can slide up and down inside the support tube 5 to change the height of the cross plate 52 and the insertion rod 521, and then place the two support members at the positions of the two connecting rods 4 on the side of the cover 1, and the sleeves 41 at the ends of the connecting rods 4 on both sides are respectively sleeved on the outer circles of the insertion rods 521 on the surfaces of the cross plates 52 on both sides. The support member can be used to support the cover 1, and the cover 1 can also be covered on the conveyor belt between the preheating equipment and the bottle blowing mold, and the brush 13 contacts the side of the base of the conveyor belt. Then, a hose is used to connect between the preform preheating chamber and the air inlet pipe 211, and at the same time, the side air pipes 14 on both sides are connected to the blower. When the blower is working, the gas is blown out from the side air pipes 14 obliquely toward the outside of the cover 1. Due to the Bernoulli principle, the flow rate at the side ports 12 on both sides of the cover 1 is fast and the air pressure is low, so that the hot air inside the preheating chamber can be sucked into the cover 1 from the air port 6 through the air inlet pipe 211 and the air inlet cylinder 2. When the hot air passes through the air inlet cylinder 2, it will also be filtered by the filter cotton 22 inside it to remove impurities and prevent dust from entering. In the subsequent maintenance process, the upper cover 21 can be rotated to drive the screw block 212 is rotated and unscrewed to facilitate the replacement of the filter cotton 22. When the preheated bottle embryo is transmitted from the preheating chamber to the bottle blowing mold via the conveyor belt, it will pass through the inner side of the cover 1. The hot air entering the cover 1 and the reflection of the heat radiation by the mirror coating 11 can keep the preheated bottle embryo warm. In addition, since there is an outward airflow inside the cover 1, the bottom of the cover 1 is blocked by the brush 13, which can prevent external dust from entering the inside of the cover 1, thereby achieving the purpose of dust prevention. Finally, the preheated bottle embryo is directly grabbed by the bottle blowing machine and passed through the bottle blowing mold for bottle blowing processing.

Claims

1. An auxiliary mechanism for plastic bottle production, characterized in that: It comprises a cover (1), an air inlet cylinder (2), a hanging member and a supporting member; the bottom of the cover (1) is connected to the outside, and both sides of the cover (1) are provided with side openings (12) connected to the outside; The air intake cylinder (2) is fixed to the middle position of the surface of the cover (1), an upper cover (21) is fixed above the air intake cylinder (2), an air intake pipe (211) connected to the inside of the air intake cylinder (2) is connected to the upper cover (21), an air port (6) connected to the inside of the cover (1) is opened on the surface of the cover (1) below the air intake cylinder (2), and side air pipes (14) connected to the inside of the cover (1) are obliquely connected to both sides of the cover (1), and the outlet of the side air pipe (14) is inclined toward the side port (12); The hanging member comprises a vertical rod (3) and a vertical tube (31); the vertical rod (3) is fixed to the two side surfaces of the cover (1); the vertical tube (31) is slidably sleeved on the outer ring of the vertical rod (3) through the rod hole (312) at the bottom thereof; a first locking bolt (311) is screwed on the lower side surface of the vertical tube (31); the end of the first locking bolt (311) penetrates into the interior of the vertical tube (31) and contacts the outer surface of the vertical rod (3); a mounting plate (32) is fixed to the top of the vertical tube (31); and the outer ring of the surface of the mounting plate (32) is evenly provided with through mounting holes (321); The support member comprises a support tube (5), a support rod (51) and a connecting rod (4); two connecting rods (4) are provided and are transversely welded and fixed on the side surfaces of the cover (1); a sleeve (41) is welded and fixed at the end of the connecting rod (4); the lower part of the support rod (51) is slidably inserted into the inside of the support tube (5); a second locking bolt (53) is screwed on the upper side of the support tube (5); the second locking bolt (53) penetrates into the inside of the support tube (5) and contacts the outer surface of the support rod (51); a horizontal plate (52) is fixed on the upper side of the support rod (51); and an insertion rod (521) is vertically fixed on the surface of the horizontal plate (52); the diameter of the insertion rod (521) is smaller than the inner diameter of the sleeve (41), and the height of the insertion rod (521) is greater than the height of the sleeve (41).

2. The auxiliary mechanism for plastic bottle production according to claim 1, characterized in that: Brushes (13) are arranged on both side surfaces of the bottom of the cover (1), and the brushes (13) on both sides are arranged in a staggered manner.

3. The auxiliary mechanism for plastic bottle production according to claim 1, characterized in that: Two sleeves (41) of the same size are fixed to the end of the connecting rod (4), and two insertion rods (521) of the same size are fixed to the surface of the transverse plate (52).

4. The auxiliary mechanism for plastic bottle production according to claim 1, characterized in that: The air inlet cylinder (2) below the upper cover (21) is filled with filter cotton (22), and the filter cotton (22) is supported and placed above a baffle (61) fixed inside the air port (6).

5. The auxiliary mechanism for plastic bottle production according to claim 4, characterized in that: A screw block (212) is provided below the upper cover (21), and the screw block (212) is screwed into the upper interior of the air intake cylinder (2) to realize detachable installation of the upper cover (21).

6. The auxiliary mechanism for plastic bottle production according to claim 1, characterized in that: A sliding block (33) is fixed to the top end of the vertical rod (3), and the sliding block (33) can be slidably placed in the vertical cylinder (31), and the size of the sliding block (33) is larger than the size of the rod hole (312).

7. The auxiliary mechanism for plastic bottle production according to claim 1, characterized in that: The inner wall surface of the cover (1) is provided with a mirror coating (11), and the mirror coating (11) is evenly distributed on the inner surface of the cover (1).

8. The auxiliary mechanism for plastic bottle production according to claim 1, characterized in that: A support plate (54) is fixed to the bottom of the support tube (5), and the support tube (5) is fixed at the middle position of the surface of the support tube (5).

9. The method for using the auxiliary mechanism for producing plastic bottles according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: According to the on-site environment in the workshop, when the conditions for lifting are met, the cover (1) is lifted and fixed by the lifting parts, and the height of the lifting parts is adjusted so that the cover (1) can be just covered above the conveyor belt between the preheating chamber and the blow molding machine mold. Conversely, the cover (1) is supported and installed by the support parts, and the height of the support parts is also adjusted so that the cover (1) can be just covered above the conveyor belt between the preheating chamber and the blow molding machine mold. Step 2: Use a hose to connect between the preheating chamber and the air inlet pipe (211), and set a blower so that its air outlet is connected to the side air pipes (14) on both sides through the hose; Step 3: The blower operates to blow air outward from the side port (12), forcing the hot air inside the preheating chamber to enter the inside of the cover (1) from the hose and the air inlet cylinder (2), and is filtered by the filter cotton (22) to remove impurities. The air flow is blown outward to prevent dust from entering the cover (1); Step 4: The preheated preform is transported from the preheating chamber to the bottle blowing mold via a conveyor belt, and passes through the inner side of the cover (1). The hot air entering the cover (1) and the reflection of the heat radiation by the mirror coating (11) play a role in keeping the preheated preform warm. Step 5: There is an outward airflow inside the cover (1), and the bottom of the cover (1) is blocked by the brush (13), which can prevent external dust from entering the inside of the cover (1), thereby achieving the purpose of dust prevention.

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