Aluminum plastic film punch forming machine

Abstract

The utility model relates to the technical field of soft package lithium battery processing, and discloses an aluminum plastic film punch forming machine, which comprises a rack, a heating mechanism, a punching mechanism, a die and a control system, the die comprises a die seat, two cavities are arranged on the die seat, and the bottom of each cavity is provided with an air suction hole and a negative pressure device for fixing an aluminum plastic film; a cutting knife with an upward cutting edge is arranged between the two cavities, and a rubber cushion pad with a cutting seam covers the cutting knife. The double-station stamping and synchronous cutting device can achieve double-station stamping and synchronous cutting, hemming in the cutting process is avoided, and the stamping and cutting precision can be improved.

Description

Technical Field

[0001] This utility model relates to the field of soft-pack lithium battery processing technology, specifically to an aluminum-plastic film stamping and forming machine. Background Technology

[0002] As electronic devices become thinner and more portable, such as mobile phones, laptops, and wearable devices, higher demands are placed on the lightweighting and miniaturization of batteries. Aluminum-plastic film, as the packaging material for pouch lithium-ion batteries, is lightweight and thin, meeting the requirements for battery lightweighting. Furthermore, pouch lithium batteries utilize a stacking process, resulting in a more compact battery structure. For the same dimensions, pouch lithium batteries have a capacity 40-50% higher than steel-cased batteries and 20-30% higher than aluminum-cased batteries, making them a key material for the development of lightweight and smaller lithium batteries.

[0003] The aluminum-plastic film consists of multiple layers, including an outer barrier layer, an adhesive layer, a permeation barrier layer, and a heat-sealing layer. The outer barrier layer is typically made of polyamide film, protecting the battery's internal structure from scratches and impact damage. The permeation barrier layer is made of rolled aluminum foil, preventing oxygen and moisture intrusion. The heat-sealing layer is mainly composed of polypropylene film, serving as a sealing and adhesive layer, ensuring good battery sealing. In the production of soft-pack lithium-ion batteries, the aluminum-plastic film stamping technology is a crucial assembly step, primarily involving stamping the aluminum-plastic film into pockets for easy cell insertion.

[0004] Currently, aluminum-plastic film stamping is mainly completed by a stamping machine. The aluminum-plastic film to be stamped is placed in an integrated mold, and then the stamping head punches down to form a groove. For thinner battery cells, a single-groove mold is often designed, while a double-groove mold is used for thicker battery cells to avoid excessive deformation of the aluminum-plastic film and breakage. However, when using a double-groove mold for stamping, the aluminum-plastic film usually needs to be cut after stamping. Cutting requires measuring dimensions to ensure the requirements of aluminum-plastic film composite processing, which is cumbersome; moreover, manual cutting also has the problem of poor cutting consistency. Utility Model Content

[0005] The present invention aims to provide an aluminum-plastic film stamping and forming machine to solve the problem of inconvenient subsequent cutting in the existing aluminum-plastic film stamping process.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an aluminum-plastic film stamping forming machine, comprising a frame, a heating mechanism, a stamping mechanism, a mold, and a control system. The mold includes a mold base, on which two cavities are provided. A cutting blade with its blade facing upward is provided between the two cavities. A buffer pad adhered to the mold covers the cutting blade, and a cutting slit is provided on the buffer pad that is directly opposite to the cutting blade.

[0007] The principle and advantages of this solution are as follows: In practical applications, addressing the problem of inconvenient subsequent cutting using double-cavity molds in the existing aluminum-plastic film stamping process, this technical solution optimizes the mold structure by adding a cutting blade to the double-cavity mold, enabling simultaneous cutting of the aluminum-plastic film during the pressing process of the stamping head. During the research and development phase, the inventors discovered that the aluminum-plastic film easily adheres during cutting, leading to burrs. Based on this, the inventors further optimized the cutting blade by adding a buffer pad above it. On the one hand, the buffer pad's cushioning effect ensures a smooth cut; on the other hand, the buffer pad's elastic recovery force allows for rapid separation of the cutting blade from the aluminum-plastic film after cutting, reducing the occurrence of burrs or curling edges.

[0008] Preferably, as an improvement, the bottom of the cavity is provided with several air suction holes, and a negative pressure device is provided below the air suction holes.

[0009] In this technical solution, by setting an air suction hole at the bottom of the cavity and using a negative pressure device, the aluminum-plastic film can be adsorbed, limited, and fixed, ensuring the stability of stamping and cutting, and thus ensuring the stamping accuracy of the aluminum-plastic film.

[0010] Preferably, as an improvement, the stamping mechanism consists of a stamping head, a driving component, and a transmission component. The stamping head includes two protrusions, which are respectively arranged opposite to two cavities.

[0011] In this technical solution, the driving component drives the stamping head to move downward through the transmission component, applying a set pressure to the positioned aluminum-plastic film, and in conjunction with the cavity of the mold, the aluminum-plastic film undergoes plastic deformation to complete the stamping operation.

[0012] Preferably, as an improvement, a pressing block is provided between the two protrusions, and the pressing block is positioned directly opposite the cutting blade.

[0013] In this technical solution, as the stamping head moves downward, the lower pressing block moves downward as well, and the lower pressing block contacts the rubber buffer pad. As the lower pressing block continues to move downward, while stamping and forming, the lower pressing block cooperates with the cutting blade to complete the cutting of the aluminum-plastic film.

[0014] Preferably, as an improvement, the longitudinal length of the pressing block is less than the longitudinal length of the protrusion.

[0015] In this technical solution, by setting the length of the lower pressure block to be less than the length of the protrusion, the problem of the cutting blade rolling due to the excessive descent distance of the lower pressure block during the stamping process can be avoided, thus ensuring the service life of the cutting blade.

[0016] Preferably, as an improvement, the cushioning pad is a rubber cushioning pad.

[0017] In this technical solution, the rubber buffer pad is inexpensive, readily available, and easy to install, which can meet the requirements of this solution for buffering and providing elastic recovery force.

[0018] Preferably, as an improvement, limit strips are provided around the mold base.

[0019] In this technical solution, the position of the aluminum-plastic film can be constrained and limited by the setting of the limiting strip, so as to ensure the stamping alignment accuracy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the aluminum-plastic film stamping machine according to an embodiment of the present invention.

[0021] Figure 2 for Figure 1 Enlarged view of point A1 in the middle. Detailed Implementation

[0022] The following detailed description provides further details on specific embodiments, but the embodiments of this utility model are not limited thereto. Unless otherwise specified, the technical means used in the following embodiments are conventional means well known to those skilled in the art; the experimental methods used are all conventional methods; and the materials and reagents used are all commercially available.

[0023] The reference numerals in the accompanying drawings include: frame 1, control system 2, punch head 3, protrusion 4, lower pressure block 5, mold base 6, cavity 7, suction hole 8, cutting blade 9, buffer pad 10.

[0024] The basic implementation examples are as follows: Figure 1 As shown: An aluminum-plastic film stamping forming machine includes a frame 1, a heating mechanism (not shown), a stamping mechanism, a mold, and a control system 2. This technical solution mainly optimizes and upgrades the structure of the stamping mechanism and the mold. No improvements are made to other components, and their structures, connections, and operating methods are all existing technologies, which will not be described in detail here.

[0025] The stamping mechanism consists of a stamping head 3, a driving component, and a transmission component. Both the driving component and the transmission component are existing technologies. The driving component is a cylinder, hydraulic cylinder, or electric cylinder, and the transmission component is a connecting rod or crankshaft. The driving component drives the transmission component, thereby transmitting power to the stamping head 3, causing it to reciprocate up and down. In this embodiment, the stamping head 3 includes two protrusions 4, and a lower pressing block 5 is disposed between the two protrusions 4. The longitudinal length of the lower pressing block 5 is less than the longitudinal length of the protrusions 4.

[0026] The mold is a double-cavity mold, which includes a mold base 6, combined with... Figure 2As shown, the mold base 6 has two cavities 7, which correspond to the two protrusions 4 of the stamping head 3. Several suction holes 8 are provided at the bottom of each cavity 7, and a negative pressure device is located below the suction holes 8. A cutting blade 9 with its blade facing upwards is positioned between the two cavities 7. A rubber buffer pad 10, adhered to the mold, covers the cutting blade 9. A cutting slit is provided on the rubber buffer pad 10, directly opposite the cutting blade 9, and the cutting slit is directly opposite the lower pressure block 5. Limiting strips are provided around the perimeter of the mold base 6.

[0027] The specific implementation process is as follows: The control system 2 sets the heating temperature, stamping pressure, and stamping speed according to the material characteristics, product specifications, and stamping process requirements of the aluminum-plastic film.

[0028] The aluminum-plastic film to be stamped is then placed above the mold. The limiting strip can limit the aluminum-plastic film to ensure that its initial position meets the stamping requirements. In addition, in this embodiment, the suction hole 8 adsorbs the aluminum-plastic film through a negative pressure device, which can achieve adsorption and fixation of the aluminum-plastic film and prevent it from shifting during stamping.

[0029] Then, the drive component, through the transmission component, moves the stamping head 3 downward, applying a set pressure to the positioned aluminum-plastic film. This, combined with the mold cavity 7, causes the aluminum-plastic film to undergo plastic deformation, completing the stamping operation. After stamping, the stamping head 3 returns to its initial position. During the downward movement of the stamping head 3, the lower pressure block 5 moves downward as well, contacting the rubber buffer pad 10. As the lower pressure block 5 continues to move downward, simultaneously with the stamping process, it works with the cutting blade 9 to cut the aluminum-plastic film. After cutting, as the lower pressure block 5 moves upward with the stamping head 3, the elastic restoring force of the rubber buffer pad 10 causes the aluminum-plastic film to quickly detach from the cutting blade 9, ensuring cutting accuracy and reducing the generation of cutting burrs.

[0030] This technical solution enables dual-station stamping of aluminum-plastic film and simultaneous cutting of two formed aluminum-plastic films, ensuring cutting quality and avoiding edge curling. It is highly practical, easy to operate, and provides good cutting consistency.

[0031] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An aluminum plastic film punch forming machine comprising a frame, a heating mechanism, a punch mechanism, a die, and a control system, characterized in that: The mold comprises a mold base, two cavities are arranged on the mold base, an upward cutting knife is arranged between the two cavities, a buffer pad is arranged above the cutting knife and is adhered to the mold, and a cutting gap opposite to the cutting knife is arranged on the buffer pad.

2. The machine for the punch forming of an aluminum-plastic film according to claim 1, characterized in that: A plurality of air suction holes are arranged at the bottom of the cavity, and a negative pressure device is arranged below the air suction holes.

3. The machine of claim 2, wherein: The stamping mechanism is composed of a stamping head, a driving part and a transmission part, the stamping head comprises two protruding parts, and the two protruding parts are arranged opposite to the two cavities respectively.

4. The machine for the punch forming of an aluminum-plastic film according to claim 3, characterized in that: A pressing block is arranged between the two protruding parts, and the pressing block is arranged opposite to the cutting knife.

5. The machine for the punch forming of an aluminum-plastic film according to claim 4, characterized in that: The longitudinal length of the pressing block is less than the longitudinal length of the protruding part.

6. An Al-PET punch forming machine according to claim 5, characterized in that: The buffer pad is a rubber buffer pad.

7. The machine of claim 6 wherein: Limiting strips are arranged around the mold base.

Images