Rapid forming blow molding machine for plastic bottles

Abstract

The utility model discloses a plastic bottle rapid forming blow molding machine, and belongs to the technical field of blow molding machines. A plastic bottle rapid forming blow molding machine comprises a machine case; the extruder is fixedly arranged in the case; the pre-forming die is fixedly arranged in the case and communicates with the extruder; the chuck assembly is movably arranged above the pre-forming die so as to clamp and move the raw materials, and a high-pressure air pipe is arranged in the chuck assembly; the movable molds are movably arranged above the pre-forming mold, the number of the movable molds is two, the movable molds are oppositely arranged, and cooling cavities are formed in the movable molds; the high-pressure spray head is fixedly mounted in the cooling cavity; the cooling water tank is fixedly mounted on the case, and the high-pressure spray head is communicated with the cooling water tank; the waste water tank is fixedly mounted in the case, and the waste water tank is communicated with the cooling cavity; and a plurality of evaporation grooves are formed in the top wall part of the cooling cavity in a penetrating manner. The blow molding machine has the beneficial effect that the blow molding machine capable of rapidly molding plastic bottles is provided.

Description

Technical Field

[0001] The present application relates to the technical field of blow molding machines, and in particular to a rapid molding blow molding machine for plastic bottles. Background Art

[0002] Plastic bottles are widely used as packaging containers for food, beverages, medicine, and personal care products. They are lightweight, low-cost, and easy to produce and transport. Plastic bottle manufacturing processes include injection molding, blow molding, and stretch blow molding. Blow molding is suitable for producing plastic bottles with complex shapes and uneven wall thickness, and is widely used in beverage bottles and food packaging.

[0003] During the blow molding process of plastic bottles, the plastic raw materials are heated and melted, then extruded into a tube through an extruder, and then blown into a bottle shape with compressed air. After the raw materials are blown into the bottle shape, they need to be cooled and shaped to solidify the raw materials. Therefore, speeding up the cooling speed of the plastic bottles can improve the production efficiency of the plastic bottles.

[0004] In view of this, the purpose of the present invention is to provide a plastic bottle rapid molding blow molding machine capable of increasing the cooling speed of plastic bottles. Utility Model Content

[0005] The content of this application is used to briefly introduce concepts that will be described in detail in the detailed description section below. The content of this application is not intended to identify key features or essential features of the technical solution for which protection is sought, nor is it intended to limit the scope of the technical solution for which protection is sought.

[0006] In order to solve the technical problems mentioned in the above background technology section, some embodiments of the present application provide a plastic bottle rapid molding blow molding machine, comprising:

[0007] Chassis;

[0008] The extruder is fixedly arranged in the chassis;

[0009] The preforming die is fixedly arranged in the chassis and is connected to the extruder;

[0010] A chuck assembly is movably disposed above the preforming die to clamp and move the raw material, and a high-pressure air pipe is disposed in the chuck assembly;

[0011] The movable mold is movably arranged above the preforming mold, two movable molds are provided and arranged opposite to each other, and a cooling cavity is formed in the movable mold;

[0012] Its characteristics are:

[0013] A plastic bottle rapid molding blow molding machine also includes:

[0014] High-pressure nozzle, fixedly installed in the cooling chamber;

[0015] The cooling water tank is fixedly installed on the chassis, and the high-pressure nozzle is connected to the cooling water tank;

[0016] The waste water tank is fixedly installed in the chassis and is connected to the cooling chamber;

[0017] A plurality of evaporation grooves are formed through the top wall of the cooling chamber.

[0018] During the working process, by setting an extruder and a preforming mold, the extruder can extrude the raw material into the preforming mold to form a tube; by setting a chuck assembly and a movable mold, the chuck assembly can clamp the tubular raw material and drive the tubular raw material to move upward to the movable mold, and the movable molds are merged by moving the two movable molds. Since a high-pressure air pipe is provided in the chuck assembly, the high-pressure air pipe can blow the tubular raw material into a bottle shape consistent with the shape of the movable mold; after the raw material is blown into a bottle shape, it needs to be cooled quickly to facilitate demolding. A cooling cavity is formed in the movable mold, and a high-pressure nozzle is installed in the cooling cavity. The high-pressure nozzle is connected to the cooling water tank to spray water mist onto the side wall of the movable mold to cool the movable mold. After the water mist evaporates, it can be discharged from the evaporation tank, and the excess water flows into the waste water tank; after the movable mold is cooled, the two movable molds are separated by moving the movable mold, and the plastic bottle can automatically fall off from the movable mold.

[0019] Furthermore, a base plate is movably arranged in the chassis along the length direction of the chassis, and two movable molds are movably arranged on the base plate along the width direction of the chassis;

[0020] A fixed plate is fixedly arranged on the base plate, a movable mold cylinder is fixedly installed on the fixed plate, and the telescopic end of the movable mold cylinder is fixedly connected to the movable mold to drive the movable mold to move.

[0021] Furthermore, a mounting plate is fixedly mounted on the inner wall of the chassis, a slide bar is fixedly mounted on the mounting plate, and the base plate is slidably mounted on the slide bar;

[0022] A screw rod is rotatably arranged on the mounting plate, and the screw rod is threadably connected to the base plate.

[0023] Furthermore, two screw rods are provided, and a first synchronous wheel and a second synchronous wheel are rotatably provided on the mounting plate, and the first synchronous wheel and the second synchronous wheel are fixedly connected to the two screw rods respectively;

[0024] A synchronous belt is arranged outside the first synchronous wheel and the second synchronous wheel. A driving motor is fixedly installed on the chassis, and an output shaft of the driving motor is fixedly connected to the first synchronous wheel.

[0025] Furthermore, a discharge port is formed on the chassis, and a discharge hopper is fixedly arranged below the movable mold in the chassis. The discharge hopper is inserted through the discharge port, and an inclined material guiding surface is formed on the discharge hopper.

[0026] Furthermore, the chuck assembly includes:

[0027] A fixed seat is movably arranged in the chassis along the height direction of the chassis;

[0028] The side panels are fixedly connected to the fixing seat, and two side panels are provided and arranged opposite to each other;

[0029] a guide rod connecting the two side panels;

[0030] A chuck seat is provided on the bottom surface of the fixed seat, and the chuck seat is slidably provided on the guide rod. Two chuck seats are provided and are arranged opposite to each other.

[0031] The clamping cylinder is fixedly mounted on the side plate, and the telescopic end of the clamping cylinder is fixedly connected to the chuck seat;

[0032] The side wall parts opposite to each other of the two clamping head seats are concave to form a bottle mouth groove, and a thread groove is formed in the bottle mouth groove.

[0033] Furthermore, an air blowing head is fixedly arranged on the bottom surface of the fixing seat, and a high-pressure air pipe is arranged in the air blowing head.

[0034] Furthermore, a driving cylinder is fixedly installed on the top surface of the chassis, and the telescopic end of the driving cylinder is inserted through the top surface of the chassis and fixedly connected to the fixing seat.

[0035] The beneficial effects of this application are:

[0036] 1. By using a high-pressure nozzle to spray water mist into the cooling chamber of the movable mold, the movable mold can be cooled quickly. The water mist evaporates when heated to form water vapor and is discharged from the evaporation groove on the top wall of the cooling chamber. The unevaporated water mist drops into the cooling box. Since the cooling box is connected to the waste water tank, the excess water will flow into the waste water tank; by spraying water mist, the movable mold can be cooled quickly, so that the raw materials can be cooled and shaped, and the plastic bottle can be quickly formed.

[0037] Second, by setting a base plate, the movable base plate can move the movable mold along the length direction of the chassis to facilitate the opening of the movable mold and discharge of plastic bottles.

[0038] 3. The chuck assembly can clamp the tubular raw material in the preforming mold and drive the tubular raw material to move into the movable mold. After the raw material is blown into shape, the clamping cylinder drives the chuck seat to move. The chuck seats move away from each other and separate from the raw material, so that when the base plate drives the movable mold to move, the plastic bottle can follow the movable mold to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings constituting a part of this application are used to provide a further understanding of this application and make other features, purposes and advantages of this application more apparent. The drawings and descriptions of the exemplary embodiments of this application are used to explain this application and do not constitute an improper limitation on this application.

[0040] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the elements and components are not necessarily drawn to scale.

[0041] In the attached figure:

[0042] Figure 1 This is an overall schematic diagram of the embodiment of the present application Figure 1 ;

[0043] Figure 2 This is an overall schematic diagram of the embodiment of the present application Figure 2 ;

[0044] Figure 3 This is a schematic diagram of the overall structure of the internal structure of the embodiment of the present application Figure 1 ;

[0045] Figure 4 It is a partial structural diagram of an embodiment of the present application, mainly showing the structure of the chuck assembly in a clamping state;

[0046] Figure 5 It is a partial structural diagram of an embodiment of the present application, mainly showing the structure of the chuck assembly in the discharge state;

[0047] Figure 6 It is a partial structural cross-sectional diagram of an embodiment of the present application, mainly showing the position structure of the chuck seat and the high-pressure air pipe;

[0048] Figure 7 This is a schematic diagram of the internal overall structure of the embodiment of the present application Figure 2 , mainly showing the driving structure of the substrate;

[0049] Figure 8 It is a partial structural cross-sectional schematic diagram of an embodiment of the present application, mainly showing the position of the high-pressure nozzle.

[0050] Reference numerals:

[0051] 1. Chassis; 2. Extruder; 3. Preform mold; 4. Moving mold; 5. Cooling chamber; 6. Chuck assembly; 7. High-pressure nozzle; 8. Cooling water tank; 9. Evaporation tank; 10. Waste water tank; 11. Driving cylinder; 12. Fixed seat; 13. Side plate; 14. Guide rod; 15. Chuck seat; 16. Clamping cylinder; 17. Driving block; 18. Bottle mouth groove; 19. Thread groove; 20. Blowing head; 21. High-pressure air pipe; 22. Base plate; 23. Fixed plate; 24. Moving mold cylinder; 25. Mounting plate; 26. Sliding rod; 27. Screw; 28. First synchronous pulley; 29. ​​Second synchronous pulley; 30. Synchronous belt; 31. Driving motor; 32. Discharge port; 33. Discharge hopper; 34. Material guide surface; 35. First hose; 36. Second hose. DETAILED DESCRIPTION

[0052] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure.

[0053] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0054] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0055] It should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more".

[0056] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0057] A plastic bottle rapid prototyping blow molding machine includes a chassis 1 and an extruder 2 fixedly arranged in the chassis 1. A preforming mold 3 is also fixedly arranged in the chassis 1. A tubular inner cavity is formed in the preforming mold 3. The preforming mold 3 is connected to the extruder 2 to extrude raw materials into the tubular inner cavity to form a tubular raw material. A movable mold 4 is movably arranged above the preforming mold 3. The movable molds 4 are provided with two movable molds 4, which are arranged opposite to each other. A cooling cavity 5 is formed in the movable mold 4; a chuck assembly 6 is movably arranged above the preforming mold 3 along the height direction of the chassis 1. The chuck assembly 6 can clamp the tubular raw material formed in the preforming mold 3 and drive the tubular raw material to move. In the extrusion state, the chuck assembly 6 is arranged on the top surface of the preforming mold 3. In the blow molding state, the chuck assembly 6 is arranged on the top surface of the movable mold 4.

[0058] Since the raw material cannot be solidified immediately in the movable mold 4 after blow molding, it needs to be slowly solidified as the temperature decreases, which will lead to a decrease in the production efficiency of plastic bottles. Therefore, the plastic bottle rapid molding blow molding machine also includes a structure that can quickly cool and solidify the plastic bottles so that the plastic bottles can be quickly molded;

[0059] Specifically, a high-pressure nozzle 7 is fixedly installed in the cooling chamber 5, and a cooling water tank 8 is fixedly installed on the chassis 1. The cooling water tank 8 is connected to the high-pressure nozzle 7 through a first hose 35. The high-pressure nozzle 7 can spray water mist into the cooling chamber 5. The water mist evaporates when heated and takes away heat to achieve a rapid cooling effect. The top wall of the cooling chamber 5 is penetrated to form an evaporation tank 9. The evaporated water vapor can be discharged from the evaporation tank 9, and the excess water accumulates in the cooling chamber 5. A waste water tank 10 is fixedly installed in the chassis 1. The bottom surface of the cooling chamber 5 is connected to the waste water tank 10 through a second hose 36, and the excess water can be discharged into the waste water tank 10.

[0060] Specifically, the top surface of the chassis 1 is fixedly mounted with a driving cylinder 11, and the telescopic end of the driving cylinder 11 is inserted through the top surface of the chassis 1 and fixedly connected to the chuck assembly 6 to drive the chuck assembly 6 to move along the height direction of the chassis 1;

[0061] The chuck assembly 6 includes a fixed seat 12, a side plate 13, a guide rod 14, a chuck seat 15, and a clamping cylinder 16. The fixed seat 12 is fixedly connected to the telescopic end of the driving cylinder 11. The side plates 13 are provided with two and are arranged oppositely. The side plates 13 are fixedly connected to the fixed seat 12. The guide rod 14 connects the two side plates 13. The chuck seat 15 is provided on the bottom surface of the fixed seat 12. The chuck seat 15 is provided with two and is arranged oppositely. The chuck seat 15 is slidably provided on the guide rod 14 along the width direction of the chassis 1. Specifically, the chuck seat 15 A driving block 17 is fixedly provided and slidably provided on the guide rod 14. A clamping cylinder 16 is fixedly installed on the side plate 13. The telescopic end of the clamping cylinder 16 is fixedly connected to the driving block 17 to drive the chuck seat 15 to move along the guide rod 14. The two clamping cylinders 16 respectively drive the two chuck seats 15 to move relative to each other. In the clamping state, the two clamping cylinders 16 approach each other and merge. In the discharging state, the clamping cylinders 16 drive the two chuck seats 15 to move away from each other, so that the bottle mouth of the plastic bottle can be moved out of the chuck seat 15.

[0062] The opposite sidewall portions of the chuck seat 15 are concave to form a bottle-mouth groove 18, and a thread groove 19 is formed in the bottle-mouth groove 18. When in the clamped state, the two bottle-mouth grooves 18 merge to form a tubular cavity, and the thread grooves 19 merge to form a corresponding and continuous thread line. When in the extrusion state, the bottle-mouth grooves 18 are connected to the tubular inner cavity of the preforming die 3, so that the raw material can be extruded into the bottle-mouth grooves 18;

[0063] A blow head 20 is fixedly provided on the bottom surface of the fixing base 12, and a high-pressure air pipe 21 is provided in the blow head 20. In the clamping state, the blow head 20 is clamped in the bottle mouth groove 18. In the blow molding state, the driving cylinder 11 drives the chuck base 15 to clamp the tubular raw material and move it into the movable mold 4. The high-pressure air pipe 21 is connected to an external device to blow-mold the tubular raw material.

[0064] Specifically, a base plate 22 is movably provided in the chassis 1 along the length direction of the chassis 1, and two movable molds 4 are movably provided on the base plate 22 along the width direction of the chassis 1. A fixing plate 23 is fixedly provided on the base plate 22, and a movable mold cylinder 24 is fixedly installed on the fixing plate 23. The telescopic end of the movable mold cylinder 24 is fixedly connected to the movable mold 4 to drive the movable mold 4 to move. In the extrusion state, the two movable molds 4 are in an open state. When the driving cylinder 11 moves the tubular raw material to a position between the two movable molds 4, the movable mold cylinder 24 drives the two movable molds 4 to approach each other until they merge. After the movable molds 4 merge, the high-pressure gas pipe 21 blows out high-pressure gas to blow-mold the raw material.

[0065] More specifically, a mounting plate 25 is fixedly mounted on the inner wall of the chassis 1, a slide rod 26 is fixedly arranged on the mounting plate 25, and the base plate 22 is slidably arranged on the slide rod 26 along the length direction of the chassis 1; a screw rod 27 is rotatably arranged on the mounting plate 25, and the screw rod 27 is threadedly connected to the base plate 22. Two screw rods 27 are provided, and the two screw rods 27 are arranged opposite to each other along the width direction of the chassis 1, and a first synchronous wheel 28 and a second synchronous wheel 29 are rotatably arranged on the mounting plate 25, and the first synchronous wheel 28 and the second synchronous wheel 29 are respectively fixedly connected to the two screw rods 27 and are coaxially arranged. A synchronous belt 30 is arranged on the outer surface of the first synchronous wheel 28 and the second synchronous wheel 29, and a drive motor 31 is fixedly mounted on the chassis 1, and the output shaft of the drive motor 31 is fixedly connected to the first synchronous wheel 28. The arrangement of the two screw rods 27 can improve the stability of the movement of the base plate 22;

[0066] A discharge port 32 is formed on the chassis 1. A discharge hopper 33 is fixedly provided below the movable mold 4 in the chassis 1. The discharge hopper 33 passes through the discharge port 32. An inclined guide surface 34 is formed on the discharge hopper 33 to guide the plastic bottles out of the chassis 1.

[0067] After the high-pressure air pipe 21 blow-moldes the tubular raw material, the clamping cylinder 16 drives the chuck seat 15 to open, the drive motor 31 drives the screw rod 27 to rotate, and the screw rod 27 drives the base plate 22 to move toward the direction close to the drive motor 31. The base plate 22 drives the two movable molds 4 to move above the discharge hopper 33, and the movable mold cylinder 24 drives the two movable molds 4 away from each other to put the blow-molded plastic bottles into the discharge hopper 33.

[0068] The specific working principle is as follows:

[0069] In the extrusion state, the driving cylinder 11 is in the extended state, at this time the chuck seat 15 is set on the top surface of the preforming mold 3, and the extruder 2 extrude the raw material into the preforming mold 3 and the bottle mouth groove 18 to form a tubular raw material;

[0070] The driving cylinder 11 contracts and drives the chuck seat 15 to move upward, and the chuck seat 15 moves the tubular raw material between the two movable molds 4;

[0071] The movable mold cylinder 24 drives the two movable molds 4 to merge, and after the movable molds 4 merge, the high-pressure air pipe 21 blows the tubular raw material into shape;

[0072] The clamping cylinder 16 extends to drive the two chuck seats 15 away from each other, so that the chuck seats 15 are separated from the plastic bottle, making it easier for the bottle mouth of the plastic bottle to move out of the chuck seats 15;

[0073] The drive motor 31 is started, and the screw rod 27 drives the base plate 22 to move. The base plate 22 drives the movable mold 4 and the plastic bottle to move. During the movement of the movable mold 4, the high-pressure nozzle 7 sprays water mist into the cooling chamber 5, so that the plastic bottle is quickly cooled and formed. The water mist evaporates when heated to form water vapor and is discharged from the evaporation tank 9. The excess water drips into the cooling chamber 5 and is discharged to the waste water tank 10.

[0074] The movable mold cylinder 24 contracts, driving the movable mold 4 to open, and the molded plastic bottles fall onto the discharge hopper 33 and are discharged from the chassis 1 along the guide surface 34.

[0075] The above description is only an illustration of some preferred embodiments of the present disclosure and the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A plastic bottle rapid molding blow molding machine, comprising: Chassis (1); An extruder (2) is fixedly arranged in the chassis (1); A preforming die (3) is fixedly disposed in the chassis (1) and is in communication with the extruder (2); A chuck assembly (6) is movably arranged above the preforming die (3) to clamp and move the raw material, and a high-pressure air pipe (21) is arranged in the chuck assembly (6); A movable mold (4) is movably arranged above the preforming mold (3), two movable molds (4) are provided and arranged opposite to each other, and a cooling cavity (5) is formed in the movable mold (4); Its characteristics are: The plastic bottle rapid prototyping blow molding machine also includes: A high-pressure nozzle (7) is fixedly installed in the cooling chamber (5); A cooling water tank (8) is fixedly mounted on the chassis (1), and the high-pressure nozzle (7) is in communication with the cooling water tank (8); A waste water tank (10) is fixedly installed in the chassis (1), and the waste water tank (10) is communicated with the cooling chamber (5); A plurality of evaporation grooves (9) are formed through the top wall portion of the cooling chamber (5).

2. A plastic bottle rapid prototyping blow molding machine according to claim 1, characterized in that: A base plate (22) is movably provided in the chassis (1) along the length direction of the chassis (1), and the two movable molds (4) are movably provided on the base plate (22) along the width direction of the chassis (1); A fixed plate (23) is fixedly arranged on the base plate (22), a movable mold (4) cylinder is fixedly installed on the fixed plate (23), and a telescopic end of the movable mold (4) cylinder is fixedly connected to the movable mold (4) to drive the movable mold (4) to move.

3. A plastic bottle rapid prototyping blow molding machine according to claim 2, characterized in that: A mounting plate (25) is fixedly mounted on the inner wall of the chassis (1), a slide bar (26) is fixedly mounted on the mounting plate (25), and the base plate (22) is slidably mounted on the slide bar (26); A screw rod (27) is rotatably arranged on the mounting plate (25), and the screw rod (27) is threadedly connected to the base plate (22).

4. A plastic bottle rapid prototyping blow molding machine according to claim 3, characterized in that: Two screw rods (27) are provided, and a first synchronous wheel (28) and a second synchronous wheel (29) are rotatably provided on the mounting plate (25), and the first synchronous wheel (28) and the second synchronous wheel (29) are fixedly connected to the two screw rods (27) respectively; A synchronous belt (30) is provided outside the first synchronous wheel (28) and the second synchronous wheel (29); a driving motor (31) is fixedly mounted on the chassis (1); and an output shaft of the driving motor (31) is fixedly connected to the first synchronous wheel (28).

5. A plastic bottle rapid prototyping blow molding machine according to claim 4, characterized in that: A discharge port (32) is formed on the chassis (1), and a discharge hopper (33) is fixedly provided in the chassis (1) below the movable mold (4). The discharge hopper (33) passes through the discharge port (32), and an inclined material guide surface (34) is formed on the discharge hopper (33).

6. The rapid molding blow molding machine for plastic bottles according to claim 1, characterized in that: The chuck assembly (6) comprises: A fixing seat (12) is movably arranged in the chassis (1) along the height direction of the chassis (1); A side plate (13) is fixedly connected to the fixing seat (12), and two side plates (13) are provided and arranged opposite to each other; A guide rod (14) connecting the two side plates (13); A chuck seat (15) is provided on the bottom surface of the fixing seat (12), the chuck seat (15) is slidably provided on the guide rod (14), and two chuck seats (15) are provided and are arranged opposite to each other; A clamping cylinder (16) is fixedly mounted on the side plate (13), and a telescopic end of the clamping cylinder (16) is fixedly connected to the clamping head seat (15); The side wall portions of the two chuck seats (15) facing each other are concave to form a bottle mouth groove (18), and a thread groove (19) is formed in the bottle mouth groove (18).

7. A plastic bottle rapid prototyping blow molding machine according to claim 6, characterized in that: An air blowing head (20) is fixedly arranged on the bottom surface of the fixing seat (12), and the high-pressure air pipe (21) is arranged in the air blowing head (20).

8. The rapid molding blow molding machine for plastic bottles according to claim 6, characterized in that: A driving cylinder (11) is fixedly mounted on the top surface of the chassis (1), and a telescopic end of the driving cylinder (11) is inserted through the top surface of the chassis (1) and fixedly connected to the fixing seat (12).

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