Blowing, filling and sealing equipment and double-layer mold closing mechanism thereof

By designing a double-layer mold clamping mechanism, the use of power components to drive mold clamping, the efficient production of two sets of bottles per cycle is solved, and the problem of low production capacity of existing equipment is improved, and the equipment production capacity is reduced and costs are reduced.

CN222590661UActive Publication Date: 2025-03-11SHINVA MEDICAL INSTR CO LTD
View PDF 0 Cites 1 Cited by

Patent Information

Application Number
CN202420529349.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-19
Publication Date
2025-03-11
Estimated Expiration
2034-03-19

AI Technical Summary

Technical Problem

The production capacity of existing blow-pouring equipment is low, and increasing production capacity requires additional purchase of equipment or adopting a dual-output solution, resulting in increased equipment costs and floor area and increased the probability of failure.

Method used

A double-layer mold clamping mechanism is designed, including two upper molds, two lower molds, two head molds and two sets of power components. The mold clamping is driven by the power components to form a first bottle body and a second bottle body spaced at upper and lower intervals, achieving efficient production of two sets of bottles per cycle.

Benefits of technology

Without increasing the footprint and equipment costs, the equipment production capacity is significantly improved, which can meet the user's capacity needs and improve production efficiency.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222590661U_ABST
    Figure CN222590661U_ABST
Patent Text Reader

Abstract

The utility model discloses blowing, filling and sealing equipment and a double-layer mold closing mechanism thereof, the double-layer mold closing mechanism comprises two upper-layer molds, two lower-layer molds, two head-layer molds and two groups of power components, and the two upper-layer molds are provided with second bottle body molds and first bottle head molds which are spaced up and down; the two lower-layer molds are respectively attached to the bottom of the upper-layer mold, and each lower-layer mold is provided with a first bottle body mold; the two first-layer molds are arranged on the sides, away from the lower-layer mold, of the upper-layer molds correspondingly, and second bottle head molds are arranged on the first-layer molds; the two sets of power assemblies can sequentially drive the lower-layer mold, the upper-layer mold and the head-layer mold to be closed so as to sequentially form a first bottle body and a second bottle body which are spaced up and down. By means of the arrangement, in the operation process of the device, two sets of bottles can be produced through one cycle, the production efficiency can be greatly improved, under the condition that the occupied area and the device cost are not increased, the device capacity is improved, and the capacity requirement of a user can be met.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a blow-fill-seal device and a double-layer mold clamping mechanism thereof. Background Art

[0002] Blowing, filling and sealing equipment refers to an automated process in which container forming, filling and sealing are completed continuously on one device. Blowing, filling and sealing equipment has the advantages of high sterility assurance and low production cost. More and more small and medium-volume preparations in the pharmaceutical industry choose blowing, filling and sealing equipment as the packaging form of the product.

[0003] At present, the production capacity of single-mode continuous blow-fill-seal equipment is low, and there is only technology for single-layer mold production, or a structure that uses multiple sets of molds for rotation. If users want to increase production capacity, they need to purchase additional equipment, which requires increased production investment, which is large and increases costs. In addition, they may also choose a double-extrusion solution to increase production capacity, that is, using one extrusion screw, two sets of extrusion dies, two sets of clamping devices and two sets of filling systems. Although this solution will increase the production capacity of the equipment, it will increase the equipment cost and equipment size, increase the user's investment, and increase the probability of equipment failure.

[0004] Therefore, the utility model provides a blow-fill-seal device and a double-layer mold clamping mechanism thereof, which improves the equipment capacity without increasing the floor space and equipment cost, and can meet the user's capacity requirements. Utility Model Content

[0005] The utility model aims to provide a blow-fill-seal device and a double-layer mold clamping mechanism thereof, which improves the equipment capacity without increasing the floor space and equipment cost, and can meet the user's capacity requirements.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A double-layer mold clamping mechanism, comprising:

[0008] Two upper molds are each provided with a second bottle body mold and a first bottle head mold spaced apart from each other;

[0009] Two lower molds are respectively fitted on the bottom of the upper mold, and the lower mold is provided with a first bottle body mold;

[0010] Two head molds are respectively arranged on the side of the upper mold away from the lower mold, and the head mold is provided with a second bottle head mold;

[0011] The two groups of power components can sequentially drive the lower mold, the upper mold and the first mold to close the mold, so as to sequentially form the first bottle body and the second bottle body spaced apart from each other.

[0012] Preferably, the power assembly includes a first power source, a second power source, and a third power source, and the output ends of the first power source, the second power source, and the third power source are all connected to a pushing member, so that the first power source, the second power source, and the third power source can respectively drive the first layer mold, the upper layer mold, and the lower layer mold to move.

[0013] Preferably, the double-layer mold clamping mechanism further includes a frame, which includes:

[0014] A mounting plate is arranged on both sides of the frame, and a second power source and a third power source are installed on the side of the mounting plate away from the upper mold;

[0015] A first fixing plate is located between the mounting plate and the first layer mold and is used to mount the first layer mold;

[0016] A second fixing plate is located between the mounting plate and the upper mold and is used to connect the upper mold;

[0017] A third fixing plate is attached to the bottom of the second fixing plate and is used to fix the lower mold;

[0018] Three groups of parallel and spaced guide shafts are provided, and the guide shafts are passed through the second fixed plate and the third fixed plate, and are used for directional movement of the upper mold and the lower mold.

[0019] Preferably, the two upper molds are respectively provided with a first pair of mold columns and a first pair of mold holes, and the two lower molds are respectively provided with a second pair of mold columns and a second pair of mold holes. The first pair of mold columns and the first pair of mold holes cooperate with each other to make the two upper molds fit tightly, and the second pair of mold columns and the second pair of mold holes cooperate with each other to make the two lower molds fit tightly.

[0020] Preferably, a first separation mold is provided between the second bottle body mold and the first bottle head mold, and a separation piece including the second separation mold is provided on the side of the head layer mold facing away from the upper layer mold. Both the first separation mold and the second separation mold can be processed with separation lines for subsequent separation of the first bottle body and the second bottle body adjacent to each other above and below.

[0021] Preferably, displacement sensors are provided on the mounting plates, and the displacement sensors are used to detect the displacement of the upper mold and the lower mold in real time.

[0022] Preferably, the frame is connected to a lifting device, which can drive the frame to move up and down to achieve continuous filling of the first bottle body and the second bottle body.

[0023] Preferably, the first power source, the second power source and the third power source are all connected to a final control system, and the final control system is used to coordinate the movement of the first layer mold, the upper layer mold and the lower layer mold.

[0024] Preferably, the first power source, the second power source and the third power source are specifically oil cylinders.

[0025] A blow-fill-seal device comprises the above-mentioned double-layer mold clamping mechanism.

[0026] Compared with the above-mentioned background technology, the double-layer mold clamping mechanism provided by the utility model includes two upper molds, two lower molds, two head molds and two groups of power components. The two upper molds are provided with a second bottle body mold and a first bottle head mold spaced up and down; the two lower molds are respectively fitted on the bottom of the upper molds, and the lower molds are provided with a first bottle body mold; the two head molds are respectively arranged on the side of the upper mold away from the lower mold, and the head mold is provided with a second bottle head mold; the two groups of power components can drive the lower molds, the upper molds and the head molds to clamp in turn, so as to form a first bottle body and a second bottle body spaced up and down in turn.

[0027] Specifically, the two lower molds are driven by the power component to close the mold to form the first bottle body, and then the power component drives the two upper molds of the second bottle body mold with upper and lower intervals and the first bottle head mold to close the mold to form the first bottle head and the second bottle body, and the first bottle body and the first bottle head form a complete first bottle body, and then the power component drives the two top-layer molds with the second bottle head mold to close the mold to form the second bottle head, and the second bottle body and the second bottle head form a complete second bottle body. With this arrangement, during the operation of the equipment, two groups of bottles can be produced in one cycle, which can greatly improve production efficiency. Without increasing the floor space and equipment cost, the equipment capacity is increased, and the user's capacity needs can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the structure of a double-layer mold clamping mechanism provided by an embodiment of the utility model;

[0030] Figure 2 A structural cross-sectional view of a double-layer mold clamping mechanism provided by an embodiment of the utility model;

[0031] Figure 3 for Figure 1 A top view of

[0032] Figure 4 A structural schematic diagram of the double-layer mold clamping mechanism provided in an embodiment of the utility model from another perspective.

[0033] in:

[0034] 100-upper mold, 110-first pair of mold columns;

[0035] 200-lower mold, 210-second pair of mold columns;

[0036] 300-first layer mold;

[0037] 410 - first power source, 420 - second power source, 430 - third power source;

[0038] 510-mounting plate, 520-first fixing plate, 530-second fixing plate, 540-third fixing plate, 550-guide shaft;

[0039] 600-separate pieces. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "top" and "bottom" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation of the present invention.

[0043] The utility model aims to provide a blow-fill-seal device and a double-layer mold clamping mechanism thereof, which improves the equipment capacity without increasing the floor space and equipment cost, and can meet the user's capacity requirements.

[0044] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0045] See also Figure 1 and Figure 2 The present embodiment provides a double-layer mold clamping mechanism, including two upper molds 100, two lower molds 200, two head molds 300 and two sets of power components.

[0046] The two upper molds 100 are each provided with a second bottle body mold and a first bottle head mold spaced apart from each other.

[0047] The two lower molds 200 are respectively disposed on the bottom of the upper mold 100 , and the lower mold 200 is provided with a first bottle body mold.

[0048] The two head molds 300 are respectively arranged on one side of the upper mold 100 away from the lower mold 200 , and the head mold 300 is provided with a second bottle head mold.

[0049] It can be understood that the second bottle body molds in the two upper molds 100 can be molded together to form a complete second bottle body. Similarly, the first bottle head molds of the two upper molds 100 can be molded together to form a complete first bottle head. In this embodiment, it is preferred that the two upper molds 100, the two lower molds 200 and the two head molds 300 are arranged relative to each other.

[0050] The two groups of power components can sequentially drive the lower mold 200, the upper mold 100 and the head mold 300 to close the molds, so as to sequentially form the first bottle body and the second bottle body spaced apart from each other.

[0051] It should be noted that the two groups of power components can sequentially drive the lower mold 200 to close the mold to form the first bottle body, and the upper mold 100 to close the mold to form the first bottle head and the second bottle body at the same time, and then the first mold 300 forms the second bottle head. After completing the synthesis of the first bottle body and the second bottle body, the two groups of power components can drive the lower mold 200, the upper mold 100 and the first mold 300 to open the mold for subsequent processes.

[0052] The packaging of the first bottle body is completed simultaneously during the formation of the first bottle head, and the packaging of the second bottle body is completed simultaneously during the formation of the second bottle head.

[0053] Specifically, the two lower molds 200 are driven by the power component to close the mold to form the first bottle body, and then the power component drives the two upper molds 100 with the second bottle body mold and the first bottle head mold with upper and lower intervals to close the mold to form the first bottle head and the second bottle body, and the first bottle body and the first bottle head form a complete first bottle body, and then the power component drives the two head molds 300 with the second bottle head mold to close the mold to form the second bottle head, and the second bottle body and the second bottle head form a complete second bottle body. With such an arrangement, during the operation of the equipment, two groups of bottles can be produced in one cycle, which can greatly improve production efficiency, increase equipment capacity without increasing the floor space and equipment cost, and meet user capacity requirements.

[0054] Preferably, the power assembly includes a first power source 410, a second power source 420, and a third power source 430, and the output ends of the first power source 410, the second power source 420, and the third power source 430 are all connected to a driving member, so that the first power source 410, the second power source 420, and the third power source 430 can respectively drive the first layer mold 300, the upper layer mold 100, and the lower layer mold 200 to move.

[0055] It can be understood that in this embodiment, the head layer mold 300, the upper layer mold 100 and the lower layer mold 200 are connected to independent power sources through independent driving members, so as to facilitate the sequential movement of the lower layer mold 200, the upper layer mold 100 and the head layer mold 300 for the formation of the first bottle body and the second bottle body.

[0056] See also Figure 3 and Figure 4 Preferably, the double-layer mold clamping mechanism also includes a frame, which includes a mounting plate 510, a first fixing plate 520, a second fixing plate 530, a third fixing plate 540 and three groups of guide shafts 550 arranged in parallel and at intervals.

[0057] The mounting plate 510 is disposed on both sides of the frame, and the second power source 420 and the third power source 430 are installed on the side of the mounting plate 510 away from the upper mold 100 .

[0058] In this embodiment, the double-layer mold clamping mechanism also includes a frame for installing the above-mentioned power assembly, and mounting plates 510 for installing the second power source 420 and the third power source 430 are provided on both sides of the frame, which are used to fix the second power source 420 and the third power source 430. The specific position of the first power source 410 can be adjusted according to actual conditions, and is preferably located between the mounting plate 510 and the first layer mold 300.

[0059] The first fixing plate 520 is located between the mounting plate 510 and the first layer mold 300 and is used for mounting the first layer mold 300 .

[0060] The second fixing plate 530 is located between the mounting plate 510 and the upper mold 100 and is used to connect the upper mold 100 .

[0061] The third fixing plate 540 is attached to the bottom of the second fixing plate 530 and is used to fix the lower mold 200 .

[0062] It can be understood that the installation and positioning of the first layer mold 300, the upper layer mold 100 and the lower layer mold 200 are respectively realized by the first fixed plate 520, the second fixed plate 530 and the third fixed plate 540, and the closing and opening processes of the first layer mold 300, the upper layer mold 100 and the lower layer mold 200 are driven by the pushing member to complete the synthesis of the first bottle body and the second bottle body, realize mechanized closing, and improve production efficiency.

[0063] The first power source 410 connected to the first layer mold 300 is arranged between the mounting plate 510 and the first layer mold 300, so that the energy consumption required for closing the first layer mold 300 can be reduced, thereby saving energy.

[0064] Three groups of guide shafts 550 are arranged in parallel and at intervals. The guide shafts 550 penetrate the second fixing plate 530 and the third fixing plate 540 and are used for directional movement of the upper mold 100 and the lower mold 200.

[0065] It can be understood that the second fixed plate 530 and the third fixed plate 540 are moved and guided by the guide shaft 550, and then the clamping process of the upper mold 100 and the lower mold 200 is guided, thereby improving the clamping accuracy of the upper mold 100 and the lower mold 200, making the molding of the first bottle body and the second bottle body stable, and improving the qualified rate of the first bottle body and the second bottle body.

[0066] It should be noted that the guide shafts 550 are preferably in three groups, and the specific number of groups of the guide shafts 550 can be adjusted according to actual conditions as long as the above-mentioned purpose can be achieved.

[0067] In addition, a through hole for a pusher connected to the first fixed plate 520 to pass through can be provided on the second fixed plate 530, so as to guide the pusher connected to the first power source 410 to drive the first layer mold 300 during the mold closing process.

[0068] Preferably, the two upper molds 100 are respectively provided with a first pair of mold columns 110 and a first pair of mold holes, and the two lower molds 200 are respectively provided with a second pair of mold columns 210 and a second pair of mold holes. The first pair of mold columns 110 and the first pair of mold holes cooperate with each other to make the two upper molds 100 fit tightly, and the second pair of mold columns 210 and the second pair of mold holes cooperate with each other to make the two lower molds 200 fit tightly.

[0069] In this embodiment, the two upper molds 100 are respectively provided with a first pair of mold columns 110 and a first pair of mold holes, and the two first pair of mold columns 110 and the two first pair of mold holes are both located at the edge of the upper mold 100. The two first pair of mold columns 110 can be simultaneously provided on one upper mold 100, and the two first pair of mold holes can be simultaneously provided on the corresponding positions of the other upper mold 100; or a first pair of mold columns 110 and a pair of mold holes can be provided on each of the two upper molds 100 for the two upper molds 100 to fit closely together, and the two lower molds 200 are correspondingly provided with a second pair of mold columns 210 and a second pair of mold holes for the two lower molds 200 to fit closely together.

[0070] Preferably, a first separation mold is provided between the second bottle body mold and the first bottle head mold, and a separation piece 600 including the second separation mold is provided on the side of the head layer mold 300 facing away from the upper layer mold 100. Both the first separation mold and the second separation mold can be processed with a separation line for subsequent separation of the first bottle body and the second bottle body adjacent to each other above and below.

[0071] It should be noted that a separation line for subsequently separating the first bottle body and the second bottle body needs to be provided between the first bottle body and the second bottle body spaced apart from each other. By providing a first separation mold between the second bottle body mold and the first bottle head mold and a second separation mold located above the head layer mold 300, continuous processing of the separation line is achieved, which facilitates the subsequent separation of the first bottle body and the second bottle body at different heights.

[0072] Preferably, a displacement sensor is provided on the mounting plate 510 , and the displacement sensor is used to detect the displacement of the upper mold 100 and the lower mold 200 in real time.

[0073] It is understandable that the mounting plate 510 is also provided with a displacement sensor for detecting the displacement of the upper mold 100 and the lower mold 200. In addition, the displacement sensor can also detect the real-time displacement of the head mold 300. An independent sensor can also be added to facilitate the accurate measurement of the displacement.

[0074] Preferably, the frame is connected to a lifting device, which can drive the frame to move up and down to achieve continuous filling of the first bottle body and the second bottle body.

[0075] In this embodiment, the frame is connected to a lifting device. During the process of the lower mold 200, the upper mold 100 and the head mold 300 being molded together to form the first bottle body and the second bottle body, the frame will drive the lower mold 200, the upper mold 100 and the head mold 300 to move downward slowly, so that the frame can move up after completing a group of first bottle bodies and second bottle bodies, and continue the above-mentioned mold closing process. In this way, the time of the two mold closings can be reduced, and the production efficiency of the first bottle body and the second bottle body can be improved.

[0076] Preferably, the first power source 410 , the second power source 420 , and the third power source 430 are all connected to a final control system, and the final control system is used to coordinate the movement of the first layer mold 300 , the upper layer mold 100 , and the lower layer mold 200 .

[0077] In this embodiment, a final control system is also provided, which can receive information from the displacement sensor in real time to regulate the operation of the first power source 410, the second power source 420, and the third power source 430, so that the mold closing process proceeds smoothly and reduces the occurrence of unexpected situations.

[0078] Preferably, the first power source 410 , the second power source 420 and the third power source 430 are specifically oil cylinders.

[0079] It is understandable that the first power source 410, the second power source 420 and the third power source 430 are preferably oil cylinders, and the types of the first power source 410, the second power source 420 and the third power source 430 can be adjusted according to actual conditions as long as the above purpose can be achieved.

[0080] In addition, the present embodiment also includes a blow-fill-seal device, which includes the above-mentioned double-layer mold clamping mechanism and also has the beneficial effects of the above-mentioned double-layer mold clamping mechanism.

[0081] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0082] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0083] The above is a detailed introduction to the embodiments provided by the utility model. This article uses specific examples to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A double-layer mold clamping mechanism, characterized in that: include: Two upper molds (100) are each provided with a second bottle body mold and a first bottle head mold spaced apart from each other; Two lower molds (200) are respectively arranged on the bottom of the upper mold (100), and the lower mold (200) is provided with a first bottle body mold; Two head molds (300) are respectively arranged on a side of the upper mold (100) away from the lower mold (200), and the head mold (300) is provided with a second bottle head mold; Two sets of power components are capable of driving the lower layer mold (200), the upper layer mold (100) and the head layer mold (300) to close the molds in sequence, so as to form a first bottle body and a second bottle body spaced apart from each other in sequence; The two upper molds (100) are respectively provided with a first pair of mold columns (110) and a first pair of mold holes, and the two lower molds (200) are respectively provided with a second pair of mold columns (210) and a second pair of mold holes, the first pair of mold columns (110) and the first pair of mold holes cooperate with each other so that the two upper molds (100) are tightly fitted, and the second pair of mold columns (210) and the second pair of mold holes cooperate with each other so that the two lower molds (200) are tightly fitted.

2. The double-layer mold clamping mechanism according to claim 1, characterized in that: The power assembly includes a first power source (410), a second power source (420), and a third power source (430). The output ends of the first power source (410), the second power source (420), and the third power source (430) are all connected to a pushing member, so that the first power source (410), the second power source (420), and the third power source (430) can respectively drive the first layer mold (300), the upper layer mold (100), and the lower layer mold (200) to move.

3. The double-layer mold clamping mechanism according to claim 2, characterized in that: Also includes a frame, the frame comprising: A mounting plate (510) is arranged on both sides of the frame, and the second power source (420) and the third power source (430) are installed on the side of the mounting plate (510) away from the upper mold (100); A first fixing plate (520), located between the mounting plate (510) and the first layer mold (300), and used for mounting the first layer mold (300); A second fixing plate (530), located between the mounting plate (510) and the upper mold (100), and used for connecting the upper mold (100); A third fixing plate (540), attached to the bottom of the second fixing plate (530), used for fixing the lower mold (200); Three groups of parallel and spaced guide shafts (550), the guide shafts (550) passing through the second fixed plate (530) and the third fixed plate (540), are used for directional movement of the upper mold (100) and the lower mold (200).

4. The double-layer mold clamping mechanism according to claim 1, characterized in that: A first separation mold is provided between the second bottle body mold and the first bottle head mold; a separation piece (600) including the second separation mold is provided on the side of the head layer mold (300) facing away from the upper layer mold (100); and both the first separation mold and the second separation mold can be processed to form a separation line for subsequent separation of the first bottle body and the second bottle body adjacent to each other.

5. The double-layer mold clamping mechanism according to claim 3, characterized in that: The mounting plate (510) is provided with a displacement sensor, and the displacement sensor is used to detect the displacement of the upper mold (100) and the lower mold (200) in real time.

6. The double-layer mold clamping mechanism according to claim 3, characterized in that: The frame is connected to a lifting device, and the lifting device can drive the frame to move up and down to achieve continuous filling of the first bottle body and the second bottle body.

7. The double-layer mold clamping mechanism according to claim 2, characterized in that: The first power source (410), the second power source (420), and the third power source (430) are all connected to a final control system, and the final control system is used to coordinate the movement of the first layer mold (300), the upper layer mold (100), and the lower layer mold (200).

8. The double-layer mold clamping mechanism according to claim 2, characterized in that: The first power source (410), the second power source (420) and the third power source (430) are specifically oil cylinders.

9. A blow-fill-seal device, characterized in that: It comprises the double-layer mold clamping mechanism described in any one of claims 1-8.

Citation Information

Cited By

  • Dual-mode high-speed intelligent bottle adjusting and controlling machine and manufacturing method thereof

    CN120572720A