One-time blow molding double-layer daily chemical bottle and manufacturing method thereof

Abstract

The invention relates to the technical field of daily chemical bottles, and discloses a one-time blow molding double-layer daily chemical bottle which comprises a bottle outer layer, a bottle inner layer attached to the inner side surface of the bottle outer layer and a bottle pump head in threaded connection to the outer portion of the upper end of the bottle outer layer. The bottle pump head comprises a pump cover assembly, a piston rod movably connected to the interior of the pump cover assembly and a pump nozzle fixedly connected to the upper end of the piston rod. A protection mechanism is arranged at the lower end of the front surface of the pump cover assembly; the protection mechanism is arranged, a worm in the protection mechanism is rotated to drive a worm gear to rotate, so that a gear drives a rack to move upwards, when the pump nozzle right faces a protection groove, a compressed spring is opened, and a protection cover moves backwards to drive the protection cover to sleeve the pump nozzle, so that the pump nozzle is protected; meanwhile, the upper end of the rack is just attached to the lower surface of the pump nozzle, so that the pump nozzle is prevented from being pressed down due to mistaken touch to discharge a medium; and double functions, namely, a mistaken touch prevention function and a pollution prevention function, are realized through the protection mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of daily chemical bottles, in particular to a one-time blow-molded double-layer daily chemical bottle and a manufacturing method thereof. Background Art

[0002] The daily chemical industry is a diversified industry, including detergents, cosmetics, skin care products, hair care products and other categories. As consumers' pursuit of health and quality of life continues to improve, the daily chemical industry has maintained a sustained growth trend. In this context, the market demand for daily chemical bottles, as an important packaging container for daily chemical products, has also increased year by year.

[0003] At present, most of the daily chemical bottles are generally pressed to discharge the medium for use. When not in use, unintentional discharge will occur due to the touch port, resulting in waste.

[0004] The Chinese patent discloses a foundation bottle pump head (authorization announcement number CN220616797U). The patented technology is provided with a locking anti-leakage device, which is conducive to locking the pressing device to avoid unintentional touch and cause the foundation liquid to be discharged, thereby reducing unnecessary waste. A plurality of locking rings are provided on the outer surface of the infusion tube port, so the locking rings are arranged in an array on the outer surface of the infusion tube port, and a movable locking rod is used to lock between the plurality of locking rings, so that the infusion tube is fixed in position, thereby achieving the effect of locking and positioning. A connecting column is fixedly passed through the middle end of the movable locking rod, and two fixing rods are movably connected at both ends of the connecting column, so that the movable locking rod is fixed in position, so that it can be movably rotated. A locking block is provided at the lower end of the movable locking rod, and a soft locking column is fixedly connected to the upper end of the locking block. Therefore, when locking, the movable locking rod is rotated to the middle of the soft locking column, so that the position is fixed, thereby achieving the effect of stable locking;

[0005] However, it has certain drawbacks: its card-type anti-leakage device can only prevent the pressing head from moving downward due to accidental touch; however, the liquid outlet, as the liquid outlet of the daily chemical bottle, is exposed to the outside and is often in contact with the external environment, and is easily invaded by pollutants such as dust and bacteria, and may even be deformed or damaged, which will not only affect the sanitary quality of the product, but may also pose a potential threat to the health of consumers, especially in humid, dusty environments or environments with harmful microorganisms, where the risk of contamination is more significant. Summary of the invention

[0006] The purpose of the present invention is to provide a one-time blow-molded double-layer daily chemical bottle and a manufacturing method thereof, so as to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A one-time blow-molded double-layer daily chemical bottle comprises a bottle outer layer, a bottle inner layer attached to the inner surface of the bottle outer layer, and a bottle pump head threadedly connected to the outer upper end of the bottle outer layer, wherein the bottle pump head comprises a pump cover assembly, a piston rod movably connected to the inside of the pump cover assembly, and a pump nozzle fixed to the upper end of the piston rod;

[0009] A protective mechanism is provided at the lower end of the front surface of the pump cover assembly, and the protective mechanism includes a support plate, a rack is vertically slidably connected to the left end of the support plate, and a first support block is fixedly connected to the upper surface of the support plate, and a support rod is rotatably connected to the upper end of the rear surface of the first support block, a gear is fixed to the outside of the support rod, and a worm gear is fixed to the outside of the support rod behind the gear, an adjusting member is provided on the upper surface of the support plate located on the right side of the first support block, and a protective member is provided on the front surface of the rack.

[0010] As a further solution of the present invention: the adjusting member comprises a second supporting block, the interior of the second supporting block is rotatably connected to a worm, and the right end of the worm is fixedly connected to a supporting disk.

[0011] As a further solution of the present invention: the protective member includes an L-shaped plate, the upper surface of the L-shaped plate is slidably connected to a protective cover in the front-to-back direction, the front surface of the protective cover is fixed with a spring, and the rear surface of the protective cover is provided with a protective groove, and the inside of the protective groove is fixed with an elastic block.

[0012] As a further solution of the present invention: the rear end of the support plate is fixedly connected to the lower end of the front surface of the pump cover assembly, and the gear is meshedly connected to the rack.

[0013] As a further solution of the present invention: the lower end of the second support block is fixed to the upper surface of the support plate, the worm is meshingly connected to the worm wheel, and the lead angle of the worm is smaller than the equivalent friction angle between the tooth surfaces of the worm wheel.

[0014] As a further solution of the present invention: the rear end of the L-shaped plate is fixedly connected to the front surface of the rack, and the front end of the spring is fixedly connected to the rear surface of the L-shaped plate.

[0015] As a further solution of the present invention: the elastic block is a component made of elastic material.

[0016] The present invention also discloses a method for manufacturing a one-time blow-molded double-layer daily chemical bottle, comprising the following steps:

[0017] S1. Material preparation: prepare the raw materials for the outer layer and the inner layer of the daily chemical bottle. The raw materials for the inner layer of the bottle include base materials and additives. Add additives: ethylene-vinyl alcohol copolymer is added to the base material of the inner layer of the bottle, and mixed in a certain proportion. In the subsequent steps, ensure that the mixed raw materials can evenly form a part of the inner layer of the bottle. The barrier layer can effectively prevent the smell of the daily chemical product from emitting outward, and also prevent the external odor from entering the bottle;

[0018] S2. Extrusion co-extrusion: The raw materials of the outer layer of the bottle and the raw materials of the inner layer of the bottle are placed in different extruders respectively. The extruder heats and melts the raw materials, adds fibers to the molten raw materials of the outer layer of the bottle, and uses a mold to align these fibers in the resin. This microscopic reinforcement structure can improve the strength and toughness of the outer layer of the bottle. Then, the molten raw materials of the outer layer and the inner layer of the bottle are extruded into the multi-layer die at the same time. The multi-layer die merges the molten resin flows from different extruders into a single multi-layer flow and guides it to form the desired product parison;

[0019] S3. Parison monitoring: multiple laser sensors are set around the parison to emit laser beams at a set frequency and receive reflected signals, so as to accurately measure the thickness of each part of the parison. The computer control system analyzes the data transmitted by the laser sensor in real time. If it is found that the thickness of a certain part of the parison exceeds the preset error range, an alarm is immediately issued and the extrusion speed of the extruder or the flow distribution of the multi-layer die is adjusted to ensure uniform thickness of the parison;

[0020] S4, Blow molding: By injecting high-pressure air into the parison, it expands and clings to the inner wall of the mold, thus forming a combination of the outer layer and the inner layer of the bottle, that is, forming the final shape of the daily chemical bottle;

[0021] S5. Cooling and shaping: The blow-molded daily chemical bottle needs to be cooled to harden it. Cooling is usually carried out using cooling water or cooling air to ensure that the daily chemical bottle can be quickly shaped after molding to prevent deformation;

[0022] S6. Trimming and finishing: After shaping, the excess plastic residue at the bottle mouth is removed by a trimming machine, and the burrs on the bottle body and bottom are removed manually;

[0023] S7, antibacterial treatment: use nano silver antibacterial agent, mix it with ethanol in a certain proportion, and then spray the antibacterial coating solution evenly on the surface of the inner layer of the bottle by spraying; then, put the daily chemical bottle into a drying room with controllable temperature and humidity, set the drying time, so that the antibacterial coating is firmly attached to the surface of the inner layer of the bottle;

[0024] S8. Assembly of the entire bottle: The protective mechanism is fixed to the surface of the bottle pump head by hot melting, and then the bottle pump head is screwed onto the outside of the outer layer of the bottle, thereby completing the production and assembly of the entire daily chemical bottle.

[0025] As a further solution of the present invention: the mass ratio of the base material and the additive in S1 is 20:1-2; the fiber in S2 is glass fiber or carbon fiber microfilament, the fiber length is 0.1-1mm, and the mass ratio of the fiber to the raw material of the outer layer of the bottle is 3-5:100.

[0026] As a further solution of the present invention: the mass ratio of the nano silver antibacterial agent to ethanol in S7 is 1:100; the temperature of the drying chamber is 50-60° C., the humidity is 30-40%, and the drying time is 1-2 hours.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention adds an additive, ethylene-vinyl alcohol copolymer, to the base material of the inner layer of the bottle. In the subsequent steps, it is ensured that the mixed raw materials can evenly form a part of the inner layer of the bottle and form a barrier layer. The barrier layer can effectively prevent the odor of the daily chemical product from emanating outward, and also prevent external odor from entering the bottle, thereby reducing the odor loss of the product during the effective use period.

[0029] 2. The present invention improves the strength and toughness of the outer layer of the bottle by adding fibers, thereby making the daily chemical bottle less likely to break when impacted by external forces, thereby greatly reducing the breakage rate of the product during circulation.

[0030] 3. The present invention uses a computer control system to perform real-time analysis on the data transmitted by the laser sensor. If it is found that the thickness of a certain part of the preform exceeds a preset error range, an alarm is immediately issued and the extrusion speed of the extruder or the flow distribution of the multi-layer head is adjusted to ensure that the thickness of the preform is uniform, thereby improving the overall quality of the daily chemical bottle and reducing the defective rate.

[0031] 4. The present invention is provided with a protection mechanism. The worm in the protection mechanism is rotated to drive the worm wheel to rotate, thereby driving the rack to move upward through the gear. When the pump nozzle is facing the protection groove, the compressed spring opens, and the protection cover moves backward to drive the protection cover to be mounted on the outside of the pump nozzle, thereby protecting the pump nozzle; at the same time, the upper end of the rack just fits the lower surface of the pump nozzle, so that the pump nozzle will not be pressed down due to accidental touch, resulting in discharge of the medium; the protection mechanism realizes dual functions, namely, the functions of preventing accidental touch and preventing pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of a double-layer daily chemical bottle formed by one-time blow molding;

[0033] Figure 2 It is a partial cross-sectional view of a double-layer daily chemical bottle formed by one-time blow molding;

[0034] Figure 3 for Figure 2 A magnified view of middle;

[0035] Figure 4 It is a schematic diagram of the structure of the protective mechanism in a one-time blow-molded double-layer daily chemical bottle;

[0036] Figure 5 It is a partial schematic diagram of the protective mechanism in a one-time blow-molded double-layer daily chemical bottle;

[0037] Figure 6 This is an exploded view of the protective part in a one-time blow-molded double-layer daily chemical bottle;

[0038] Figure 7 This is the rear view of the protective cover of a one-time blow-molded double-layer daily chemical bottle.

[0039] In the figure: 1. bottle outer layer; 2. bottle inner layer; 3. bottle pump head; 4. pump cover assembly; 5. piston rod; 6. pump nozzle; 7. protection mechanism; 8. support plate; 9. rack; 10. first support block; 11. support rod; 12. gear; 13. worm gear; 14. adjustment member; 15. second support block; 16. worm; 17. support plate; 18. protection member; 19. L-shaped plate; 20. protection cover; 21. spring; 22. protection groove; 23. elastic block. DETAILED DESCRIPTION

[0040] See also Figures 1 to 3 In the embodiment of the present invention, a one-time blow-molded double-layer daily chemical bottle comprises a bottle outer layer 1, a bottle inner layer 2 attached to the inner surface of the bottle outer layer 1, a bottle pump head 3 threadedly connected to the outer upper end of the bottle outer layer 1, and the bottle pump head 3 comprises a pump cover assembly 4, a piston rod 5 movably connected to the inside of the pump cover assembly 4, and a pump nozzle 6 fixed to the upper end of the piston rod 5;

[0041] The bottle pump head 3 is a structure existing in real life, and has the same structure and principle as that disclosed in a Chinese patent for a foundation bottle pump head (CN220616797U) after removing the locking anti-leakage device;

[0042] The working principle of the bottle pump head 3 is that when the user presses the pump nozzle 6, the piston rod 5 will move downward to absorb the medium into the pump body; when the piston rod 5 descends to a certain height, a certain pump pressure will be generated to send the medium out of the pipeline; when the user releases his hand, the piston rod 5 rebounds to its original position under the action of the spring, at which time negative pressure is formed inside the cavity, and the straw sucks in new medium, thereby realizing continuous suction and delivery of the medium.

[0043] exist Figure 1 , Figure 4 and Figure 5 Middle: The lower end of the front surface of the pump cover assembly 4 is provided with a protection mechanism 7, which includes a support plate 8, the rear end of the support plate 8 is fixedly connected to the lower end of the front surface of the pump cover assembly 4, the left end of the support plate 8 is vertically slidably connected to a rack 9, and the upper surface of the support plate 8 is fixedly connected to a first support block 10, the upper end of the rear surface of the first support block 10 is rotatably connected to a support rod 11, the outer portion of the support rod 11 is fixedly connected to a gear 12, the gear 12 is meshedly connected to the rack 9, and the outer portion of the support rod 11 is fixedly connected to the gear 12. A worm wheel 13 is fixedly connected to the rear of the gear 12, an adjusting member 14 is arranged on the upper surface of the support plate 8 and located on the right side of the first supporting block 10, the adjusting member 14 comprises a second supporting block 15, the lower end of the second supporting block 15 is fixedly connected to the upper surface of the support plate 8, a worm 16 is rotatably connected inside the second supporting block 15, the worm 16 is meshedly connected to the worm wheel 13, and the lead angle of the worm 16 is less than the equivalent friction angle between the tooth surfaces of the worm wheel 13, and a supporting plate 17 is fixedly connected to the right end of the worm 16;

[0044] Since the lead angle of the worm 16 is smaller than the equivalent friction angle between the tooth surfaces of the worm wheel 13, the entire mechanism has self-locking properties and can achieve reverse self-locking, that is, the worm wheel 13 can only be driven to rotate by the worm 16, but the worm wheel 13 cannot drive the worm 16 to rotate;

[0045] The worm 16 is rotated, and the rack 9 can be driven to move up and down under the linkage of the worm wheel 13, the support rod 11, and the gear 12. When the rack 9 rises to the highest point, its upper end is in contact with the pump nozzle 6, so that the pump nozzle 6 will not be pressed down due to accidental touch, resulting in the discharge of the medium;

[0046] The diameter of the support disk 17 is relatively large compared to the worm 16 , so that the rotation of the worm 16 is facilitated.

[0047] exist Figure 1 , Figures 4 to 7 Middle: A protective member 18 is provided on the front surface of the rack 9, and the protective member 18 includes an L-shaped plate 19, the rear end of the L-shaped plate 19 is fixedly connected to the front surface of the rack 9, and a protective cover 20 is slidably connected to the upper surface of the L-shaped plate 19 in the front-to-back direction, and a spring 21 is fixedly connected to the front surface of the protective cover 20, and the front end of the spring 21 is fixedly connected to the rear surface of the L-shaped plate 19, and a protective groove 22 is provided on the rear surface of the protective cover 20, and an elastic block 23 is fixedly connected inside the protective groove 22, and the elastic block 23 is a component made of elastic material;

[0048] The piston rod 5 can move up and down in the pump cover assembly 4, and can also rotate. Therefore, when the pump nozzle 6 is pressed down, it can be rotated to a certain angle to stagger the protective cover 20 to avoid certain obstruction by the protective cover 20.

[0049] The surface of one side of the protective cover 20 close to the bottle pump head 3 is an arc-shaped surface; therefore, when the protective cover 20 moves upward, it will be squeezed by the pump nozzle 6 to move forward to compress the spring 21. When the pump nozzle 6 is directly opposite to the protective groove 22, the spring 21 opens, and the protective cover 20 moves backward to drive the protective cover 20 to be sleeved to the outside of the pump nozzle 6, thereby protecting the pump nozzle 6 and preventing external dust and impurities from adhering to the pump nozzle 6, causing the medium in the daily chemical bottle to be contaminated when it is in use;

[0050] When the protective cover 20 is sleeved on the outside of the pump nozzle 6, the upper end of the rack 9 just fits the lower surface of the pump nozzle 6;

[0051] The material of the elastic block 23 is preferably rubber, which fits tightly to the pump nozzle 6, thereby improving the sealing performance and further improving the protection effect.

[0052] The working principle of the present invention is: when the daily chemical bottle is not in use, the user can rotate the support plate 17 to drive the worm 16 to rotate. Since the worm 16 is meshed with the worm wheel 13, the worm wheel 13 will drive the support rod 11 to rotate, thereby driving the gear 12 to rotate, and then driving the rack 9 to move upward; during the upward movement, the pump nozzle 6 squeezes the protective cover 20, driving the protective cover 20 to move forward and compress the spring 21. When the pump nozzle 6 is facing the protective groove 22, the spring 21 opens, and the protective cover 20 moves backward, driving the protective cover 20 to be mounted on the outside of the pump nozzle 6, thereby protecting the pump nozzle 6; at the same time, the upper end of the rack 9 just fits the lower surface of the pump nozzle 6, so that the pump nozzle 6 will not be pressed down due to accidental touch, resulting in medium discharge.

[0053] The present invention also discloses a method for manufacturing a one-time blow-molded double-layer daily chemical bottle, comprising the following steps:

[0054] S1. Material preparation: prepare the raw materials of the outer layer 1 and the inner layer 2 of the daily chemical bottle. The raw materials of the inner layer 2 include a base material and an additive. Add the additive: ethylene-vinyl alcohol copolymer to the base material of the inner layer 2. Mix the base material and the additive in a mass ratio of 20:1-2. In the subsequent steps, ensure that the mixed raw materials can evenly form a part of the inner layer 2. The barrier layer can effectively prevent the smell of the daily chemical product from emitting outward, and also prevent the external odor from entering the bottle;

[0055] For some daily chemical products with special fragrances, such as perfumes, aromatherapy products or functional skin care products with special smells (such as products containing plant essential oil ingredients), preventing the smell from emitting can maintain the original quality of the product. If the smell of the product is emitted too quickly, it may affect the product's use effect and the consumer's experience. The use of a barrier layer can reduce the smell loss during the effective use period of the product.

[0056] S2. Extrusion co-extrusion: the raw materials of the outer layer 1 of the bottle and the raw materials of the inner layer 2 of the bottle are placed in different extruders respectively, the extruders heat and melt the raw materials, and fibers are added to the molten raw materials of the outer layer 1 of the bottle. The fibers are glass fibers or carbon fiber microfilaments, the length of the fibers is 0.1-1mm, and the mass ratio of the fibers to the raw materials of the outer layer 1 of the bottle is 3-5:100. The mold is used to make these fibers oriented in the resin. This microscopic reinforcement structure can improve the strength and toughness of the outer layer 1 of the bottle. Subsequently, the molten raw materials of the outer layer 1 of the bottle and the inner layer 2 of the bottle are squeezed into the multi-layer die at the same time. The multi-layer die merges the molten resin flows from different extruders into a single multi-layer flow and guides it to form the desired product parison;

[0057] By adding fibers, the strength and toughness of the outer layer 1 of the bottle are improved, and the daily chemical bottle is less likely to break when subjected to external impact (such as collision during transportation, accidental knocking over on the shelf, etc.). Ordinary daily chemical bottles may be damaged after being subjected to a certain impact force, while the impact force that the bottle using microstructure enhancement technology can withstand can be greatly increased, which greatly reduces the breakage rate of the product during circulation;

[0058] S3. Parison monitoring: multiple laser sensors are set around the parison to emit laser beams at a set frequency and receive reflected signals, so as to accurately measure the thickness of each part of the parison. The computer control system analyzes the data transmitted by the laser sensor in real time. If it is found that the thickness of a certain part of the parison exceeds the preset error range, an alarm is immediately issued and the extrusion speed of the extruder or the flow distribution of the multi-layer die is adjusted to ensure uniform thickness of the parison;

[0059] The uniformity of the parison thickness is crucial to the quality of the final daily chemical bottle. Uneven parison thickness causes weak points in certain parts of the blow-molded bottle, which is easy to break or deform. By intelligently monitoring and adjusting the parison thickness, the overall quality of the daily chemical bottle can be greatly improved and the defective rate can be reduced. The traditional production method leads to waste of raw materials due to the inability to accurately control the parison thickness. For example, in order to ensure the strength of the bottle, excessive use of raw materials may be used to compensate for the problem of uneven thickness. However, the use of this intelligent monitoring technology can accurately control the parison thickness and avoid unnecessary waste of raw materials.

[0060] S4, blow molding: by injecting high-pressure air into the parison, the parison expands and clings to the inner wall of the mold, thus forming a combination of the bottle outer layer 1 and the bottle inner layer 2, that is, forming the final shape of the daily chemical bottle;

[0061] S5. Cooling and shaping: The blow-molded daily chemical bottle needs to be cooled to harden it. Cooling is usually carried out using cooling water or cooling air to ensure that the daily chemical bottle can be quickly shaped after molding to prevent deformation;

[0062] S6. Trimming and finishing: After shaping, the excess plastic residue at the bottle mouth is removed by a trimming machine, and the burrs on the bottle body and bottom are removed manually;

[0063] S7, antibacterial treatment: use nano silver antibacterial agent, mix with ethanol in a mass ratio of 1:100, and then spray the antibacterial coating solution evenly on the surface of the bottle inner layer 2 by spraying; then, put the daily chemical bottle into a temperature and humidity controllable drying room, set the temperature of the drying room to 50-60°C, the humidity to 30-40%, and the drying time to 1-2h, so that the antibacterial coating is firmly attached to the surface of the bottle inner layer 2;

[0064] S8, assembling the whole bottle: fix the protection mechanism 7 to the surface of the bottle pump head 3 by hot melting, and then screw the bottle pump head 3 to the outside of the bottle outer layer 1, and the production and assembly of the whole daily chemical bottle can be completed.

[0065] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0066] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A one-time blow-molded double-layer daily chemical bottle, comprising a bottle outer layer (1), a bottle inner layer (2) attached to the inner surface of the bottle outer layer (1), and a bottle pump head (3) threadedly connected to the outer upper end of the bottle outer layer (1), wherein the bottle pump head (3) comprises a pump cover assembly (4), a piston rod (5) movably connected to the inside of the pump cover assembly (4), and a pump nozzle (6) fixed to the upper end of the piston rod (5); It is characterized in that A protective mechanism (7) is provided at the lower end of the front surface of the pump cover assembly (4), and the protective mechanism (7) includes a support plate (8), a rack (9) is vertically slidably connected inside the left end of the support plate (8), and a first support block (10) is fixedly connected to the upper surface of the support plate (8), and a support rod (11) is rotatably connected to the upper end of the rear surface of the first support block (10), a gear (12) is fixedly connected to the outside of the support rod (11), and a worm gear (13) is fixedly connected to the outside of the support rod (11) behind the gear (12), and an adjusting member (14) is provided on the upper surface of the support plate (8) located on the right side of the first support block (10), and a protective member (18) is provided on the front surface of the rack (9).

2. The disposable blow-molded double-layer daily chemical bottle according to claim 1, characterized in that: The adjusting member (14) comprises a second supporting block (15), the interior of the second supporting block (15) is rotatably connected to a worm (16), and the right end of the worm (16) is fixedly connected to a supporting plate (17).

3. The disposable blow-molded double-layer daily chemical bottle according to claim 1, characterized in that: The protective member (18) comprises an L-shaped plate (19), the upper surface of the L-shaped plate (19) is slidably connected to a protective cover (20) in the front-to-back direction, the front surface of the protective cover (20) is fixedly connected to a spring (21), and the rear surface of the protective cover (20) is provided with a protective groove (22), and the interior of the protective groove (22) is fixedly connected to an elastic block (23).

4. The one-time blow-molded double-layer daily chemical bottle according to claim 1, characterized in that: The rear end of the support plate (8) is fixedly connected to the lower end of the front surface of the pump cover assembly (4), and the gear (12) is meshedly connected to the rack (9).

5. The one-time blow-molded double-layer daily chemical bottle according to claim 2, characterized in that: The lower end of the second support block (15) is fixed to the upper surface of the support plate (8), the worm (16) is meshingly connected to the worm wheel (13), and the lead angle of the worm (16) is smaller than the equivalent friction angle between the tooth surfaces of the worm wheel (13).

6. The one-time blow-molded double-layer daily chemical bottle according to claim 3, characterized in that: The rear end of the L-shaped plate (19) is fixedly connected to the front surface of the rack (9), and the front end of the spring (21) is fixedly connected to the rear surface of the L-shaped plate (19).

7. The one-time blow-molded double-layer daily chemical bottle according to claim 3, characterized in that: The elastic block (23) is a component made of elastic material.

8. A method for manufacturing a one-time blow-molded double-layer daily chemical bottle as described in any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Material preparation: preparing raw materials for the outer layer (1) and the inner layer (2) of the daily chemical bottle, wherein the raw materials for the inner layer (2) include a base material and an additive, and adding an additive: ethylene-vinyl alcohol copolymer to the base material of the inner layer (2), and mixing them in a certain proportion. In subsequent steps, ensure that the mixed raw materials can evenly form a part of the inner layer (2), and the barrier layer can effectively prevent the odor of the daily chemical product from emitting outward, and can also prevent external odor from entering the bottle; S2, extrusion co-extrusion: the raw materials of the bottle outer layer (1) and the raw materials of the bottle inner layer (2) are placed in different extruders respectively, the extruders heat and melt the raw materials, add fibers to the molten raw materials of the bottle outer layer (1), and use a mold to align these fibers in the resin. This microscopic reinforcement structure can improve the strength and toughness of the bottle outer layer (1). Then, the molten raw materials of the bottle outer layer (1) and the bottle inner layer (2) are extruded into a multi-layer die at the same time. The multi-layer die merges the molten resin flows from different extruders into a single multi-layer flow and guides it to form the desired product parison; S3. Parison monitoring: multiple laser sensors are set around the parison to emit laser beams at a set frequency and receive reflected signals, so as to accurately measure the thickness of each part of the parison. The computer control system analyzes the data transmitted by the laser sensor in real time. If it is found that the thickness of a certain part of the parison exceeds the preset error range, an alarm is immediately issued and the extrusion speed of the extruder or the flow distribution of the multi-layer die is adjusted to ensure uniform thickness of the parison; S4, blow molding: by injecting high-pressure air into the parison, the parison expands and clings to the inner wall of the mold, thus forming a combination of the bottle outer layer (1) and the bottle inner layer (2), that is, forming the final shape of the daily chemical bottle; S5. Cooling and shaping: The blow-molded daily chemical bottle needs to be cooled to harden it. Cooling is usually carried out using cooling water or cooling air to ensure that the daily chemical bottle can be quickly shaped after molding to prevent deformation; S6. Trimming and finishing: After shaping, the excess plastic residue at the bottle mouth is removed by a trimming machine, and the burrs on the bottle body and bottom are removed manually; S7, antibacterial treatment: using a nano-silver antibacterial agent, mixing it with ethanol in a certain proportion, and then spraying the antibacterial coating solution evenly on the surface of the bottle inner layer (2) by spraying; then, placing the daily chemical bottle in a drying room with controllable temperature and humidity, setting the drying time, so that the antibacterial coating is firmly attached to the surface of the bottle inner layer (2); S8, assembling the whole bottle: the protective mechanism (7) is fixedly connected to the surface of the bottle pump head (3) by hot melting, and then the bottle pump head (3) is screwed onto the outside of the bottle outer layer (1), thereby completing the production and assembly of the whole daily chemical bottle.

9. The method for making a one-time blow-molded double-layer daily chemical bottle according to claim 8, characterized in that: The mass ratio of the base material to the additive in S1 is 20:1-2; the fibers in S2 are glass fibers or carbon fiber microfilaments, the length of the fibers is 0.1-1 mm, and the mass ratio of the fibers to the raw materials of the bottle outer layer (1) is 3-5:

100.

10. The method for manufacturing a one-time blow-molded double-layer daily chemical bottle according to claim 8, characterized in that: The mass ratio of the nano silver antibacterial agent to ethanol in the S7 is 1:100; the temperature of the drying chamber is 50-60° C., the humidity is 30-40%, and the drying time is 1-2 hours.

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