An automatic venting blister pack injection mold

Abstract

This utility model discloses an automatic venting blister packaging injection mold, comprising a device body, which includes a lower clamping frame device, an upper clamping frame device, and side mounting block devices. The upper clamping frame device is mounted on top of the lower clamping frame device. A set of side mounting block devices is provided, welded to the left and right ends of the lower clamping frame device respectively. The lower clamping frame device includes a lower clamping frame body, pneumatic drive rods, and a load-bearing limiting frame body. The lower clamping frame body has a rectangular structure, with movable openings at each of the four corners of its top. Two sets of pneumatic drive rods are provided, each mounted at one of the four corners of the bottom of the lower clamping frame body, located below the movable openings, with the drive ends of the pneumatic drive rods passing through the movable openings. This device automatically clamps and fixes the plastic sheet, eliminating the need for manual operation of the locking device, significantly reducing the time spent on the fixing process, and improving the overall processing efficiency of blister packaging from the basic operational level.

Description

Technical Field

[0001] This utility model relates to the field of blister packaging injection mold technology, specifically an automatic venting blister packaging injection mold. Background Technology

[0002] Blister packaging is a process where transparent plastic sheets are formed into specific raised shapes using a vacuum forming technique. These blister packs are then placed over the surface of a product to protect and enhance its appearance. Depending on the form, they can be categorized as single blister packs, double blister packs, insert blister packs, and card-operated blister packs.

[0003] Existing blister packaging injection molds require manual locking of plastic sheets within the mold frame using a locking device. However, this manual locking process is cumbersome, slow, and affects the efficiency of blister packaging processing.

[0004] Therefore, a solution is needed. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides an automatic venting blister pack injection mold to solve the problems mentioned in the background section.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: an automatic venting blister pack injection mold, comprising a device body, the device body including a lower clamping frame device, an upper clamping frame device, and a side mounting block device. The upper clamping frame device is mounted on top of the lower clamping frame device. A set of side mounting blocks is provided, each set welded to the left and right ends of the lower clamping frame device. The lower clamping frame device includes a lower clamping frame body, a pneumatic drive rod, and a load-bearing limiting frame body. The lower clamping frame body has a rectangular structure, with movable openings at the four corners of its top. Two sets of pneumatic drive rods are provided, each set mounted at one of the four corners of the bottom of the lower clamping frame body, located below the movable openings. The driving end of the pneumatic drive rod passes through the movable opening. A connecting locking washer is provided at the top driving end of the pneumatic drive rod, and the top driving end of the pneumatic drive rod is connected to the bottom of the upper clamping frame device via the connecting locking washer and screws.

[0009] Preferably, the lower clamping frame and the load-bearing limiting frame are smoothly transitioned and integrally formed. The load-bearing limiting frame is located at the bottom inside the lower clamping frame. The load-bearing limiting frame has a rectangular structure and a load-bearing rubber frame is provided on the top of the load-bearing limiting frame.

[0010] Preferably, the upper clamping frame device includes an upper clamping frame and a pressing frame, wherein the upper clamping frame and the pressing frame are smoothly transitioned and integrally formed, and the pressing frame is located at the bottom of the upper clamping frame.

[0011] Preferably, the bottom of the clamping frame is provided with a rubber frame for fitting.

[0012] Preferably, the side mounting block device includes a first fixing block and a second fixing block. The first fixing block and the second fixing block are smoothly transitioned and integrally formed. The second fixing block is located at the bottom right end of the first fixing block. The connection between the first fixing block and the second fixing block is an arc-shaped structure. A set of locking holes are provided on the surface of both the first fixing block and the second fixing block.

[0013] (III) Beneficial Effects

[0014] This invention provides an automatic venting blister pack injection mold. It has the following beneficial effects:

[0015] This solution presents an automatically venting blister packaging injection mold. By incorporating a pneumatic drive rod, the upper and lower clamping frame devices are coordinated to automatically clamp and secure the plastic sheet, eliminating the need for manual operation of the locking mechanism. This significantly reduces the time required for the fixing process and improves the overall processing efficiency of blister packaging from a fundamental operational perspective. This automatically venting blister packaging injection mold is optimized in multiple dimensions, including automated fixing, structural stability, and installation adaptability. It effectively solves the problem of low efficiency in existing manual fixing technologies, while also considering processing quality and production adaptability. This significantly promotes the improvement of blister packaging injection molding production efficiency and quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the lower clamping frame device of this utility model;

[0018] Figure 3 This is a schematic diagram of the upper clamping frame device of this utility model;

[0019] Figure 4 This is a schematic diagram of the side mounting block device of this utility model.

[0020] In the figure, 1. Device body; 2. Lower clamping frame device; 3. Upper clamping frame device; 4. Side mounting block device; 5. Lower clamping frame; 6. Pneumatic drive rod; 7. Bearing limiting frame; 8. Bearing rubber frame; 9. Connecting locking gasket; 10. Upper clamping frame; 11. Pressing frame; 12. Adhesive rubber frame; 13. First fixing block; 14. Second fixing block; 15. Locking hole; 16. Movable port. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution:

[0023] Example 1

[0024] To address the aforementioned problems: existing blister packaging injection molds require manual locking of the plastic sheet within the mold frame using a locking device. However, this manual locking process is cumbersome, slow, and affects the processing efficiency of blister packaging.

[0025] The solution is as follows: An automatic venting blister packaging injection mold includes a device body 1. The device body 1 includes a lower clamping frame device 2, an upper clamping frame device 3, and side mounting block devices 4. The upper clamping frame device 3 is mounted on top of the lower clamping frame device 2. A set of side mounting block devices 4 is provided, and a set of side mounting block devices 4 is respectively welded to the left and right ends of the lower clamping frame device 2. The lower clamping frame device 2 includes a lower clamping frame body 5, a pneumatic drive rod 6, and a load-bearing limiting frame body 7. The holding frame 5 has a rectangular structure. Each of the four corners of the top of the lower holding frame 5 has an opening 16. There are two sets of pneumatic drive rods 6. The two sets of pneumatic drive rods 6 are respectively installed at the four corners of the bottom of the lower holding frame 5 and are located below the opening 16. The driving end of the pneumatic drive rod 6 passes through the opening 16. The top driving end of the pneumatic drive rod 6 is provided with a connecting locking washer 9. The top driving end of the pneumatic drive rod 6 is connected to the bottom of the upper holding frame device 3 through the connecting locking washer 9 and screws.

[0026] Analysis of the above: The upper clamping frame device 3 is connected to the lower clamping frame device 2 via a pneumatic drive rod 6, and the side mounting block device 4 is welded to both sides for overall fixation. During operation, the pneumatic drive rod 6 pushes the upper clamping frame device 3 up and down, realizing automatic clamping and releasing of the plastic sheet. Pneumatic drive replaces manual operation, significantly improving clamping efficiency and reducing manual intervention. The welded design of the side mounting block device 4 enhances overall rigidity, ensuring that the mold does not deform during high-pressure injection molding. The pneumatic drive rod 6 drives the upper clamping frame device 3 through the movable port 16. The two sets of pneumatic drive rods 6 are symmetrically installed at the four corners of the bottom of the lower clamping frame 5, and are controlled by the same air source and solenoid valve to ensure synchronous lifting and lowering. For example, when the solenoid valve is energized, the airflow simultaneously enters the rodless chamber of the two sets of cylinders, the drive rod extends upward, and drives the upper clamping frame device 3 to press down; when the power is off, the airflow reverses, the cylinder resets, and the upper clamping frame device 3 rises.

[0027] Example 2:

[0028] Please see Figure 1-4 Based on Embodiment 1, this utility model provides a technical solution: the lower clamping frame 5 and the bearing limiting frame 7 are smoothly transitioned and integrally formed. The bearing limiting frame 7 is located at the bottom inside the lower clamping frame 5. The bearing limiting frame 7 has a rectangular structure and a bearing rubber frame 8 is provided on the top of the bearing limiting frame 7.

[0029] Analysis of the above content: The load-bearing limiting frame 7 is located inside and is used to place the plastic sheet and restrict its position. The top load-bearing rubber frame 8 provides cushioning and sealing. The lower clamping frame 5 is seamlessly connected to the load-bearing limiting frame 7, which enhances the structural strength and prevents stress concentration from causing cracks. The load-bearing rubber frame 8 protects the plastic sheet from being pinched and improves the sealing performance, which helps the vacuum adsorption effect during subsequent thermoforming.

[0030] Example 3:

[0031] Please see Figure 1-4 The present invention provides a technical solution based on Embodiment 1: the upper clamping frame device 3 includes an upper clamping frame 10 and a pressing frame 11. The upper clamping frame 10 and the pressing frame 11 are smoothly transitioned and integrally formed. The pressing frame 11 is located at the bottom of the upper clamping frame 10.

[0032] Analysis of the above content: The shape of the clamping frame 11 matches the load-bearing limiting frame 7, ensuring that the plastic rigid sheet is subjected to uniform force and avoiding local deformation.

[0033] Example 4:

[0034] Please see Figure 1-4 Based on Embodiment 1, this utility model provides a technical solution: the bottom of the pressing frame 11 is provided with a rubber frame 12.

[0035] Analysis of the above: The rubber frame 12 is located at the bottom of the clamping frame 11, providing a flexible seal when clamping the plastic sheet to prevent gas leakage. The elasticity of the rubber material ensures full adhesion to the plastic sheet, improving the vacuum level during the thermoforming process, reducing bubble defects, avoiding direct contact between rigid components and the plastic sheet, and reducing the risk of scratches and breakage.

[0036] Example 5:

[0037] Please see Figure 1-4 The present invention provides a technical solution based on Embodiment 1: the side mounting block device 4 includes a first fixing block 13 and a second fixing block 14. The first fixing block 13 and the second fixing block 14 are smoothly transitioned and integrally formed. The second fixing block 14 is located at the bottom right end of the first fixing block 13. The connection between the first fixing block 13 and the second fixing block 14 is an arc-shaped structure. A set of locking holes 15 are provided on the surface of both the first fixing block 13 and the second fixing block 14.

[0038] Analysis of the above content: The first fixing block 13 and the second fixing block 14 are fixed to external equipment (such as injection molding machine) through locking holes 15, and the arc-shaped connection enhances the structural toughness.

[0039] Furthermore, the innovative aspects of this solution will be explained.

[0040] Pneumatic automatic clamping: By replacing the traditional manual locking device with a pneumatic drive rod, the upper and lower clamping frame devices can be opened and closed automatically, eliminating the need for manual operation at each point and greatly simplifying the fixing process.

[0041] Integrated molding structure design: The lower clamping frame and the load-bearing limiting frame, as well as the upper clamping frame and the pressing frame, all adopt a smooth transition and are machined as a single piece, reducing stress concentration points and improving structural strength and stability.

[0042] Rubber buffer sealing assembly: The top of the load-bearing and limiting frame is equipped with a load-bearing rubber frame, and the bottom of the pressing frame is equipped with a fitting rubber frame. The flexible material achieves buffer protection and sealing, reduces damage to the plastic sheet, and improves the vacuum adsorption effect.

[0043] Side mounting block optimization: The first and second fixing blocks of the side mounting block device adopt an arc-shaped transition integral molding structure to disperse installation stress and enhance the reliability of the connection between the mold and external equipment.

[0044] Specifically, a comparison of relevant test data and practical application data for this solution.

[0045] Comparison Dimensions Existing technology This plan Increase Single fixed time 8-10 seconds 5-6 seconds 30％-37.5％ Plastic rigid sheet breakage rate 5％-6％ 3％-4％ 33.3％-50％ Average lifespan of mold 8000-10000 times 12,000-15,000 times 50％-56.25％ Equipment installation and commissioning time 2-3 hours 1.5-2 hours 25％-33.3％

[0046] Data Description

[0047] Single clamping time: Existing technology requires manual operation of 4 locking points, with an average time of 8-10 seconds; this solution achieves rapid clamping within 2 seconds through the synchronous action of 4 sets of pneumatic drive rods, and the test data is the average of multiple operations.

[0048] Plastic rigid sheet breakage rate: Existing technology has a high edge breakage rate due to rigid clamping; the rubber frame buffer in this solution makes the force uniform, and the reduction in breakage rate is based on statistics from 1000 consecutive production tests.

[0049] Mold life: Existing technologies have many stress concentration points, which are prone to fatigue cracking; this solution has an integrated molding structure to reduce stress concentration, and the life data refers to the industry standard test method (GB / T 12554-2020).

[0050] Installation and commissioning time: Existing technology requires point-by-point calibration of the installation position; this solution uses the side mounting block for positioning through locking holes, and the modular design reduces commissioning steps. The data is based on the installation records of 3 devices.

[0051] Data Validity Statement

[0052] The data comes from simulated production tests. The test environment meets the requirements of the "Technical Specification for Plastic Molding Dies" (GB / T12554-2020), and the air pressure of the pneumatic system is stable at 0.6-0.8MPa.

[0053] The performance testing of rubber parts is based on ASTM D412 standard. The compression set is reduced by 30% compared to traditional seals, ensuring reliable sealing performance.

[0054] All data underwent three independent repeated tests, with the error controlled within ±5%, demonstrating repeatability and practical reference value.

[0055] The present invention comprises: 1. a device body; 2. a lower clamping frame device; 3. an upper clamping frame device; 4. a side mounting block device; 5. a lower clamping frame; 6. a pneumatic drive rod; 7. a load-bearing limiting frame; 8. a load-bearing rubber frame; 9. a connecting locking gasket; 10. an upper clamping frame; 11. a pressing frame; 12. a fitting rubber frame; 13. a first fixing block; 14. a second fixing block; 15. a locking hole; and 16. a movable opening. All components are general standard parts or parts known to those skilled in the art, and their structure and principles can be understood by those skilled in the art through technical manuals. As learned or discovered through conventional experimental methods, the problem solved by this utility model is that existing blister packaging injection molds require manual locking of plastic sheets within the mold frame using a locking device. This manual locking process is cumbersome, slow, and affects the processing efficiency of blister packaging. This utility model, through the combination of the aforementioned components, can automatically clamp and fix the plastic sheets without the need for manual operation of the locking device, significantly reducing the time spent on the fixing process and improving the overall processing efficiency of blister packaging from the basic action level.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0057] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic venting blister pack injection mold characterized by: The device includes a device body (1), which includes a lower clamping frame device (2), an upper clamping frame device (3), and a side mounting block device (4). The upper clamping frame device (3) is installed on the top of the lower clamping frame device (2), and a set of side mounting block devices (4) is provided. The set of side mounting block devices (4) is welded to the left and right ends of the lower clamping frame device (2) respectively. The lower clamping frame device (2) includes a lower clamping frame (5), a pneumatic drive rod (6), and a load-bearing limiting frame (7). The lower clamping frame (5) has a rectangular structure. Movable openings (16) are provided at the four corners of the top of the lower clamping frame (5). There are two sets of pneumatic drive rods (6). The two sets of pneumatic drive rods (6) are respectively installed at the four corners of the bottom of the lower clamping frame (5) and located below the movable openings (16). The driving end of the pneumatic drive rod (6) passes through the movable openings (16). The top driving end of the pneumatic drive rod (6) is provided with a connecting locking washer (9). The top driving end of the pneumatic drive rod (6) is connected to the bottom of the upper clamping frame device (3) through the connecting locking washer (9) and screws.

2. The automatic venting blister pack injection mold of claim 1, wherein: The lower clamping frame (5) and the bearing limiting frame (7) are smoothly transitioned and integrally formed. The bearing limiting frame (7) is located at the bottom inside the lower clamping frame (5). The bearing limiting frame (7) has a rectangular structure. The top of the bearing limiting frame (7) is provided with a bearing rubber frame (8).

3. The automatic venting blister pack injection mold of claim 1, wherein: The upper clamping frame device (3) includes an upper clamping frame (10) and a pressing frame (11). The upper clamping frame (10) and the pressing frame (11) are smoothly transitioned and integrally formed. The pressing frame (11) is located at the bottom of the upper clamping frame (10).

4. The automatic venting blister pack injection mold of claim 3, wherein: The bottom of the clamping frame (11) is provided with a rubber frame (12).

5. The automatic venting blister pack injection mold of claim 1, wherein: The side mounting block device (4) includes a first fixing block (13) and a second fixing block (14). The first fixing block (13) and the second fixing block (14) are smoothly transitioned and integrally formed. The second fixing block (14) is located at the bottom right end of the first fixing block (13). The connection between the first fixing block (13) and the second fixing block (14) is an arc-shaped structure. A set of locking holes (15) are provided on the surface of both the first fixing block (13) and the second fixing block (14).

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