A type of insert head for a heating machine

Abstract

This utility model provides a preform inserter for a heating machine. The preform inserter base serves as the supporting structure. The base has coaxial bearing mounting holes on its upper and lower sides, each hole containing a bearing. The end of each bearing engages with a groove in the base for positioning. A preform inserter shaft passes through the inner rings of two bearings, with its upper end connected to a sprocket via riveting. A spacer sleeve, two bushings, and a compression spring are sequentially fitted onto the preform inserter shaft in the section between the two bearings. The lower bushing is engaged with the preform inserter shaft via a shaft clip. A second shaft passes through the base directly opposite, with two bearings (third) fitted on it. A spacer sleeve (second) is placed between the two bearings (third), and a third spacer sleeve (third) is placed outside the outer bearing (third). A first shaft passes through the base on the right side, with bearings (second) fitted above and below it, and the upper end engaged with a shaft clip (second). A fourth bearing is embedded on the left side of the base, and the base has a threaded hole for locking a nut. A flat washer is fitted between the nut and the base. The advantages of this utility model are: the preform inserter head reduces wear, improves insertion accuracy, is easy to assemble, has a compact structure, reduces maintenance costs, and effectively improves the heating quality and production efficiency of preforms.

Description

Technical Field

[0001] This utility model mainly relates to the field of heating machine technology, specifically to a preform inserter for a heating machine. The preform inserter is used to carry the preform during the preform heating process and drive the preform to rotate to achieve uniform heating, thus ensuring that the subsequent blow molding machine blows qualified bottle shapes. Background Technology

[0002] In the blow molding process, the preform must first be heated to the appropriate blowing temperature by a heating machine in order to blow bottles with an attractive appearance and qualified dimensions. The heating of the preform is accomplished by the preform inserter. By inserting the preform onto the preform inserter, the preform inserter drives the preform to rotate, so that the temperature of the preform is uniform in the circumferential direction, thereby ensuring that the quality of the bottles blown subsequently meets the standards.

[0003] However, existing preform inserters wear out quickly during prolonged rotation, leading to inaccurate preform insertion positions and inconsistent preform mouth heights. This not only directly affects bottle blowing quality and increases production losses, but also increases equipment maintenance frequency and costs, reduces overall production efficiency, and fails to meet the demands of stable mass production. Utility Model Content

[0004] 1. The technical problem to be solved by the utility model: This utility model provides a blank inserter for a heating machine to solve the technical problems existing in the background art.

[0005] 2. Technical Solution: To achieve the above objectives, the technical solution provided by this utility model is as follows: a blank inserter for a heating machine, comprising a blank inserter base, wherein coaxial bearing mounting holes are respectively opened on the upper and lower sides of the blank inserter base, a bearing is embedded in each bearing mounting hole, and the center lines of the two bearings are collinear, and a hole clip is engaged at the end of each bearing, the hole clip cooperating with the slot of the blank inserter base to restrict the bearing from sliding axially, a blank inserter shaft is inserted through the inner ring of the bearing, and a sprocket is fixedly connected to the upper end of the blank inserter shaft by a riveting process; The insert shaft is located between the two bearings, and a spacer, a bushing, and a compression spring are sequentially fitted on the insert shaft, with two bushings in total; A mounting hole 1 is provided on the opposite side of the insert head base. A shaft 2 passes through the mounting hole 1. Two bearings 3 are fitted on the shaft 2. A spacer 2 is fitted between the two bearings 3. A spacer 3 is fitted on the outer side of the bearing 3 on the side away from the insert head base. The center line of the shaft 2 intersects perpendicularly with the center line of the insert shaft. The right side of the insert head base is provided with a through mounting hole 2. A shaft 1 passes through the mounting hole 2. Bearings 2 are respectively fitted on the upper and lower sides of the shaft 1. A shaft clip 2 is engaged at the upper end of the shaft 1, and the shaft clip 2 restricts the shaft 1 from sliding down axially.

[0006] Furthermore, the two bushings are respectively fitted on the upper and lower sides of the compression spring, and the inner hole of the bushing is a hole that matches the outer flat surface of the insert shaft; a shaft clip is provided below the lower bushing, and the shaft clip engages with the insert shaft.

[0007] Furthermore, the insert head base is provided with a threaded hole, a locking nut is connected in the threaded hole, and a flat washer is fitted between the locking nut and the insert head base; a bearing mounting hole is provided on the left side of the insert head base, and a bearing is embedded in the bearing mounting hole; the outer wall of the shaft is clearance-fitted with the inner wall of the mounting hole on the right side of the insert head base.

[0008] Furthermore, the inner diameter of the flat washer is adapted to the outer diameter of the screw of the locking nut, and the outer diameter of the flat washer is larger than the diameter of the threaded hole on the insert head base.

[0009] Furthermore, the axial length of the spacer sleeve two is adapted to the spacing between the two bearings three, and the axial length of the spacer sleeve three is adapted to the spacing between the bearing three and the end of the shaft two on the side away from the insert head base.

[0010] Furthermore, the axial length of the bushing is adapted to the distance from the end of the compression spring to the inner ring end face of the adjacent bearing, and the inner diameter of the bushing is adapted to the outer diameter of the corresponding section of the insert shaft.

[0011] Furthermore, a clearance is provided between the outer wall of the insert shaft and the inner ring side wall of the bearing.

[0012] 3. Beneficial effects: Compared with the prior art, the technical solution provided by this utility model has the following advantages: The movement clearance between the preform insertion shaft and bearing one reduces wear and improves preform insertion accuracy; the built-in compression spring, which relies on the base structure to block high temperature, extends its service life; the modular assembly design is convenient, and the overall compact structure can improve the space utilization of the heating machine; the matching and cooperation of multiple bearings and shafts ensures stable operation, which not only reduces equipment maintenance costs, but also effectively improves the preform heating quality and production efficiency.

[0013] It should be noted that the structures not described in this utility model are not related to the design points and improvement directions of this utility model, and are the same as or can be implemented using existing technology, so they will not be elaborated here. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is another angle of the overall structural cross-sectional view of this utility model; Figure 3 For the present utility model Figure 2 Enlarged view at point A; Figure 4 For the present utility model Figure 2 Enlarged view at point B.

[0015] Figure label: 1. Insert shaft; 2. Sprocket; 3. Hole clamp; 4. Bearing 1; 5. Spacer 1; 6. Bushing; 7. Compression spring; 8. Insert head base; 9. Locking nut; 10. Flat washer; 11. Shaft clamp 1; 12. Bearing 2; 13. Shaft 1; 14. Bearing 3; 15. Shaft 2; 16. Spacer 2; 17. Spacer 3; 18. Bearing 4; 19. Shaft clamp 2. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0017] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] See attached document Figure 1-4 A blank inserter for a heating machine includes a blank inserter base 8. The upper and lower sides of the blank inserter base 8 are respectively provided with coaxial bearing mounting holes. Each bearing mounting hole is fitted with a bearing 4, and the center lines of the two bearings 4 are collinear. Each end of the bearing 4 is engaged with a clip 3. The clip 3 cooperates with the clip groove of the blank inserter base 8 to restrict the bearing 4 from sliding axially. A blank inserter shaft 1 is inserted through the inner ring of the bearing 4. The upper end of the blank inserter shaft 1 is fixedly connected to a sprocket 2 by a riveting process. The insert shaft 1 is located between two bearings 4. The insert shaft 1 is sequentially fitted with a spacer 5, a bushing 6 and a compression spring 7. There are two bushings 6. A mounting hole 1 is provided on the opposite side of the blank insertion head base 8. A shaft 2 15 is inserted through the mounting hole 1. Two bearings 3 14 are fitted on the shaft 2 15. A spacer 2 16 is fitted between the two bearings 3 14. A spacer 3 17 is fitted on the outer side of the bearing 3 14 on the side away from the blank insertion head base 8. The center line of the shaft 2 15 intersects perpendicularly with the center line of the blank insertion shaft 1. The right side of the insert head base 8 has a through mounting hole 2. A shaft 13 is inserted through the mounting hole 2. Bearings 2 12 are respectively fitted on the upper and lower sides of the shaft 13. A shaft clip 2 19 is engaged at the upper end of the shaft 13, and the shaft clip 2 19 restricts the shaft 13 from sliding down axially.

[0021] This preform inserter uses the preform inserter base 8 as the integral load-bearing body, ensuring sufficient structural strength and stability even under the high-temperature environment of the heating machine. Coaxial bearing mounting holes are machined on the upper and lower sides of the preform inserter base 8. The diameter of these holes matches the outer ring diameter of bearing 4, ensuring the coaxiality of the two mounting holes and guaranteeing the stable rotation of the preform inserter shaft 1. This prevents preform insertion misalignment due to shaft wobbling. Two bearings 4 are respectively embedded into the upper and lower bearing mounting holes, ensuring a tight fit between the outer ring of bearing 4 and the inner wall of the mounting hole. The center lines of the two bearings 4 are completely collinear. At the end of each bearing 4 (i.e., the end closest to the outer side of the preform inserter base 8), a locking clip 3 is fitted into a pre-set annular groove on the preform inserter base 8. After the locking clip 3 elastically engages with the groove, its end face fits against the inner ring end face of bearing 4, effectively restricting the axial slippage of bearing 4 without affecting the rotational freedom of the inner ring. This simplifies the bearing fixing method and facilitates subsequent bearing disassembly and maintenance.

[0022] 1. Assembly of the preform inserter and related components. The preform inserter 1 is the component that directly supports the preform. The specific assembly and function are as follows: Inserting the preform shaft 1 from bottom to top into the inner rings of the two bearings 4, with a pre-reserved movable gap between the outer wall of the preform shaft 1 and the inner wall of the bearing 4, which ensures that the preform shaft 1 can rotate flexibly in the inner ring of the bearing 4, meeting the requirement of uniform circumferential heating when preform is heated, and allowing the preform shaft 1 to slide slightly along the axial direction to adapt to the insertion requirements of preforms of different heights, while reducing rigid friction between the shaft and the bearing and reducing the wear rate. At the upper end of the insert shaft 1 (i.e. the part extending out of the upper bearing 4), a riveting process is carried out by a pneumatic riveting machine to fix the sprocket 2 to the insert shaft 1. After riveting, it is necessary to ensure that the end face of the sprocket 2 is perpendicular to the axis of the insert shaft 1 and that there is no relative looseness between the two. This ensures that when the transmission chain of the heater drives the sprocket 2 to rotate, the torque can be stably transmitted to the insert shaft 1, so that the insert shaft 1 drives the preform to rotate synchronously, avoiding uneven heating of the preform due to slippage in power transmission. In the section between the two bearings 4 of the insert shaft 1, spacer 5, bushing 6 and compression spring 7 are installed in order from bottom to top. Compression spring 7 is installed above the lower bushing 6. Compression spring 7 can provide buffering force during bottle insertion to ensure that the bottle can be accurately inserted into the positioning groove of insert shaft 1, while avoiding damage to the bottle opening due to excessive insertion force. The upper bushing 6 is installed above the compression spring 7, which is exactly the same as the lower bushing 6. Its function is to evenly transmit the elastic force of compression spring 7 to the upper part, while further limiting the radial movement of compression spring 7. Spacer 5 is installed above the upper bushing 6. The upper end of spacer 5 fits against the inner ring end face of the upper bearing 4. The compression stroke of compression spring 7 can be precisely controlled by adjusting the length of spacer 5 to avoid excessive compression of compression spring leading to fatigue failure. Below the lower bushing 6, a shaft clip 11 is fitted into the pre-set annular groove on the insert shaft 1. After the shaft clip 11 is inserted, its upper end face fits tightly against the lower end face of the lower bushing 6, which can fix the axial position of the lower bushing 6 and thus lock the compression state of the compression spring 7, ensuring that the compression spring 7 can always provide a stable buffering force for the insert shaft 1.

[0023] 2. Assembly of side drive and connecting components A mounting hole is provided directly opposite the insert head base 8 (i.e., in the direction perpendicular to the axis of the insert shaft 1), the diameter of which is adapted to the outer diameter of the shaft 2 15. The specific assembly is as follows: Insert the shaft 2 15 into the mounting hole of the insert head base 8, and then install the following on the shaft 2 15 in the following order from the base outward: first bearing 3 14, spacer 2 16, second bearing 3 14, and spacer 3 17; wherein, the axial length of the spacer 2 16 is perfectly matched with the distance between the two bearing 3 14, which can separate the two bearing 3 14 and prevent the two bearing 3 14 from being exposed to each other. During operation, the inner rings rub against each other. The axial length of spacer 317 is matched with the distance between the outer bearing 314 and the end of shaft 215, which can limit the axial displacement of the outer bearing 314. The center line of shaft 215 intersects perpendicularly with the center line of the preform insertion shaft 1, which can make the bearing 314 on shaft 215 fit precisely with the guide rail inside the heater. When multiple preform insertion heads are installed side by side, the cooperation between shaft 215 and the guide rail can ensure that the axes of all preform insertion shafts 1 are in the same plane, avoiding inconsistent preform heating positions due to preform insertion head offset. On the right side of the insert head base 8, a through mounting hole is machined. The assembly steps are as follows: Insert shaft 13 from bottom to top into the mounting hole on the right side. Fit a bearing 12 on the upper and lower sides of shaft 13 respectively. The inner ring of bearing 12 is interference-fitted with shaft 13, and the outer ring is clearance-fitted with the mounting hole of insert head base 8. This can reduce the frictional resistance when shaft 13 rotates. At the upper end of shaft 13 (i.e., the part that extends out of the upper bearing 12), clamp shaft clip 19 is installed. The lower end face of shaft clip 19 fits against the end face of the inner ring of the upper bearing 12. This can restrict shaft 13 from sliding down axially and ensure that the bearing 12 is fixed on the shaft. The outer wall of shaft 13 is clearance-fitted with the inner wall of the mounting hole on the right side of insert head base 8. This can adapt to the temperature changes when the heater is working and prevent shaft 13 from jamming due to thermal expansion and contraction, ensuring that it can always rotate flexibly. Assembly of the left bearing 18 and the threaded hole assembly of the insert head base 8: On the left side of the insert head base 8, a bearing mounting hole adapted to the outer ring of bearing 18 is machined. Bearing 18 is embedded in the hole. When multiple insert heads are connected side by side in the heating machine, the shaft 13 on the right side of the adjacent insert head can pass through the inner ring of the bearing 18 on the left side of the insert head. The bearing 18 reduces the friction between shaft 13 and the adjacent base, ensuring smooth operation when multiple insert heads are linked. On the side wall of the insert head base 8 ( Near the upper bearing 4, a threaded hole is machined. The flat washer 10 is fitted onto the screw of the locking nut 9, and then the locking nut 9 is screwed into the threaded hole. The inner diameter of the flat washer 10 is matched with the outer diameter of the screw of the locking nut 9, and the outer diameter is larger than the diameter of the threaded hole. This is used to distribute the pressure of the locking nut 9 on the insert head base 8 and prevent the threaded hole from being damaged due to concentrated force. By tightening the locking nut 9, the insert head base 8 can be fixed on the frame of the heating machine to ensure that the base does not shift during operation.

[0024] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A blank inserter for a heating machine, characterized in that, The device includes a blank holder base (8), on which coaxial bearing mounting holes are provided on the upper and lower sides respectively. Each bearing mounting hole is fitted with a bearing (4), and the center lines of the two bearings (4) are collinear. Each bearing (4) is fitted with a clip (3) at its end. The clip (3) cooperates with the groove of the blank holder base (8) to restrict the bearing (4) from sliding down along the axial direction. A blank holder shaft (1) is inserted through the inner ring of the bearing (4). A sprocket (2) is fixedly connected to the upper end of the blank holder shaft (1) by riveting. The insert shaft (1) is located between the two bearings (4). The insert shaft (1) is fitted with a spacer (5), a bushing (6) and a compression spring (7) in sequence. There are two bushings (6). The mounting hole 1 is provided on the opposite side of the insert head base (8). The mounting hole 1 is provided with shaft 2 (15). Two bearings 3 (14) are fitted on the shaft 2 (15). A spacer 2 (16) is fitted between the two bearings 3 (14). A spacer 3 (17) is fitted on the outside of the bearing 3 (14) away from the insert head base (8). The center line of the shaft 2 (15) intersects perpendicularly with the center line of the insert shaft (1). The right side of the insert head base (8) is provided with a through mounting hole 2, and a shaft 1 (13) is inserted in the mounting hole 2. Bearings 2 (12) are respectively fitted on the upper and lower sides of the shaft 1 (13). A shaft clip 2 (19) is engaged at the upper end of the shaft 1 (13). The shaft clip 2 (19) restricts the shaft 1 (13) from sliding down along the axial direction.

2. The insert head for a heating machine according to claim 1, characterized in that: Two bushings (6) are respectively fitted on the upper and lower sides of the compression spring (7), and the inner hole of the bushing (6) is a hole that matches the outer flat surface of the insert shaft (1); a shaft clip (11) is provided below the lower bushing (6), and the shaft clip (11) is engaged with the insert shaft (1).

3. The insert head for a heating machine according to claim 1, characterized in that: The insert head base (8) is also provided with a threaded hole, and a locking nut (9) is connected in the threaded hole. A flat washer (10) is fitted between the locking nut (9) and the insert head base (8). A bearing mounting hole is provided on the left side of the insert head base (8), and a bearing four (18) is embedded in the bearing mounting hole. The outer wall of the shaft one (13) and the inner wall of the mounting hole on the right side of the insert head base (8) are in clearance fit.

4. The insert head for a heating machine according to claim 3, characterized in that: The inner diameter of the flat washer (10) is adapted to the outer diameter of the screw of the locking nut (9), and the outer diameter of the flat washer (10) is larger than the diameter of the threaded hole on the insert head base (8).

5. The insert head for a heating machine according to claim 1, characterized in that: The axial length of the second spacer (16) is adapted to the distance between the two bearings (14), and the axial length of the third spacer (17) is adapted to the distance from the bearing (14) to the end of the second shaft (15) on the side away from the insert head base (8).

6. The blank inserter for a heating machine according to claim 1, characterized in that: The axial length of the bushing (6) is adapted to the distance from the end of the compression spring (7) to the inner ring end face of the adjacent bearing (4), and the inner diameter of the bushing (6) is adapted to the outer diameter of the corresponding section of the insert shaft (1).

7. The insert head for a heating machine according to claim 1, characterized in that: A clearance is provided between the outer wall of the insert shaft (1) and the inner ring side wall of the bearing (4).

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