Blow molding molds for medical packaging bags

Abstract

The utility model discloses a blow molding mold for a medicinal packaging bag, comprising a base, a mounting plate fixedly mounted on the base, two groups of electric push rods fixedly mounted on one side of the mounting plate, a movable plate fixedly connected to the driving shafts of the two groups of electric push rods, an upper mold fixedly mounted on one side of the movable plate, a fixed plate fixedly mounted on the base, a lower mold fixedly connected on one side of the fixed plate, the lower mold matched with the upper mold, a support block fixedly mounted on the base, a core rod placed on the support block, a pressure block arranged on the core rod, the pressure block matched with the support block, and the pressure block movably connected to the side of the movable plate. In the utility model, the connecting rod cooperates with the fixed seat, the pressure block, the slider and the support block, and the pressure block automatically moves to release the fixation of the pressure block to the core rod when the mold is opened, so that different core rods can be easily replaced, thereby improving the production efficiency of blow molding of medicinal packaging bags.

Description

Technical Field

[0001] The utility model relates to the field of medicinal packaging bags, in particular to a blow molding mold for medicinal packaging bags. Background Art

[0002] Medical packaging bags are containers used to package medical supplies. The materials of medical packaging bags are diverse, mainly including plastic synthetic medical polymer materials such as high-density polyethylene, polypropylene, polyvinyl chloride and other materials with good moisture resistance and high tensile strength.

[0003] The production of medicinal packaging bags requires high precision, and injection blow molding is often used. Injection blow molding first uses an injection molding machine to inject the molten material through the gate into the mold around the core rod in the cylindrical mold cavity. The mold's temperature control system cools the preform and solidifies on the core rod; then after the mold is opened, the preform is placed on the core mold, the mold is closed while hot, and compressed air is introduced to inflate the preform; finally, after the preform is cooled, the mold is opened to obtain the corresponding product.

[0004] However, most of the existing core rods are fixed on the fixing seat by screws, and it is necessary to remove and install the screws to replace core rods of different specifications. The operation is complicated and affects the production efficiency of blow molding of medicinal packaging bags. Utility Model Content

[0005] Aiming at the technical problem that the existing core rods of different specifications need to be replaced by disassembling and installing screws, which is complicated and affects the production efficiency of blow molding of medicinal packaging bags, the utility model provides a blow molding mold for medicinal packaging bags.

[0006] The technical solution adopted by the utility model is: it includes a base, a mounting plate is fixedly installed on the base, two groups of electric push rods are fixedly installed on one side of the mounting plate, a movable plate is fixedly connected to the driving shafts of the two groups of electric push rods, an upper mold is fixedly installed on one side of the movable plate, a fixed plate is fixedly installed on the base, a lower mold is fixedly connected to one side of the fixed plate, the lower mold is matched with the upper mold, a supporting block is fixedly installed on the base, a core rod is placed on the supporting block, a pressing block is arranged on the core rod, the pressing block is matched with the supporting block, and the pressing block is movably connected to the side of the movable plate.

[0007] Furthermore, a sliding groove is provided on one side of the fixed plate, a slider is slidably installed inside the sliding groove, one side of the slider is fixedly connected to the side of the pressure block, a fixed seat is fixedly installed on the pressure block, a connecting rod is rotatably installed on the fixed seat, and one end of the connecting rod away from the fixed seat is rotatably installed on the side of the movable plate.

[0008] By adopting the above technical solution, a movable connection between the pressing block and the movable plate is achieved.

[0009] Furthermore, a limiting block is fixedly installed on the outside of the core rod, a first limiting groove is opened at the upper end of the support block, and a second limiting groove is opened at the lower end of the pressure block, and the second limiting groove can be adapted to the limiting block after cooperating with the first limiting groove.

[0010] By adopting the above technical solution, the fixing effect of the core rod between the support block and the pressing block is improved.

[0011] Furthermore, cavities are provided on opposite sides of the upper mold and the lower mold, a positioning hole is provided on one side of the lower mold, and a positioning column is fixedly connected to one side of the upper mold, and the positioning column is adapted to the positioning hole.

[0012] By adopting the above technical solution, the sealing performance of the upper mold and the lower mold is improved.

[0013] Furthermore, the core rod is hollow, an air outlet is provided on the circumferential surface of the core rod, and a baffle is provided on the outer fixed sleeve of the core rod.

[0014] By adopting the above technical solution, the core rod blow molding effect is improved and the product quality of the medicinal packaging bag is improved.

[0015] Furthermore, a slideway is provided at the upper end of the support block, the slideway is communicated with the first limiting groove, and the slideway is matched with the baffle.

[0016] By adopting the above technical solution, the core rod can be conveniently fixed between the support block and the pressing block.

[0017] Furthermore, three groups of guide holes are formed on the movable plate, guide rods are slidably installed in the three groups of guide holes, and the guide rods are fixedly connected between the mounting plate and the fixed plate.

[0018] By adopting the above technical solution, the stability of the upper mold during movement is improved.

[0019] The beneficial effects of the utility model are as follows: the upper mold is driven to move by the electric push rod in cooperation with the moving plate, which facilitates the closing and opening of the upper and lower molds; the connecting rod cooperates with the fixed seat, the pressure block, the sliding block and the supporting block so that the pressure block moves downward to cooperate with the supporting block to fix the core rod during the mold closing, thereby ensuring the stability of the core rod during the blow molding process and the quality of the blow molded products; when the mold is opened, the pressure block automatically moves to release the fixation of the pressure block to the core rod, which facilitates the replacement of different core rods, thereby improving the blow molding production efficiency of medicinal packaging bags. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structure entity diagram of the utility model;

[0021] Figure 2 It is a schematic diagram of the structure of the upper mold and the lower mold after the mold is closed in the utility model;

[0022] Figure 3 It is a structural schematic diagram of the upper die and the lower die in the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the pressure block in the utility model;

[0024] Figure 5 It is a schematic diagram of the cross-sectional structure of the support block and the pressure block when the mold is closed in the utility model;

[0025] Figure 6 It is a structural schematic diagram of the core rod of the utility model.

[0026] The numbers in the figure are: 1. base; 2. mounting plate; 3. electric push rod; 4. moving plate; 5. upper mold; 6. lower mold; 7. fixed plate; 8. slide groove; 9. support block; 10. pressure block; 11. core rod; 12. slideway; 13. slider; 14. fixed seat; 15. connecting rod; 16. first limiting groove; 17. second limiting groove; 18. cavity; 19. positioning hole; 20. positioning column; 21. air outlet; 22. baffle; 23. limiting block; 24. guide hole; 25. guide rod. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The following is combined with Figure 1-6 The utility model is further described.

[0030] In order to solve the problems existing in the background technology, the present application proposes the following technical solutions: it includes a base 1, a mounting plate 2 is fixedly installed on the base 1, two groups of electric push rods 3 are fixedly installed on one side of the mounting plate 2, a movable plate 4 is fixedly connected to the driving shafts of the two groups of electric push rods 3, an upper mold 5 is fixedly installed on one side of the movable plate 4, and the movable plate 4 provides installation conditions for the upper mold 5, a fixed plate 7 is fixedly installed on the base 1, and a lower mold 6 is fixedly connected to the side of the fixed plate 7 close to the upper mold 5, and the lower mold 6 is adapted to the upper mold 5. The movable plate 4 is driven to move by the electric push rod 3, and the movable plate 4 drives the upper mold 5 to move, so that the upper mold 5 is fitted with the lower mold 6 to complete the mold closing operation.

[0031] A support block 9 is fixedly mounted on the base 1, a core rod 11 is placed on the support block 9, an end of the core rod 11 away from the upper mold 5 and the lower mold 6 is opened and connected to an external compressed gas generating device, a pressing block 10 is arranged on the core rod 11, the pressing block 10 is adapted to the support block 9, the pressing block 10 is movably connected to the side of the movable plate 4, the pressing block 10 cooperates with the support block 9 to fix the core rod 11 between the two, so that the core rod 11 remains stable during the blow molding process, thereby ensuring the quality of the medicinal packaging bag.

[0032] It is further explained that a slide groove 8 is opened on one side of the fixed plate 7, and a slider 13 is slidably installed inside the slide groove 8. One side of the slider 13 is fixedly connected to the side of the pressure block 10. A fixed seat 14 is fixedly installed on the pressure block 10, and a connecting rod 15 is rotatably installed on the fixed seat 14. The end of the connecting rod 15 away from the fixed seat 14 is rotatably installed on the side of the movable plate 4.

[0033] The electric push rod 3 drives the movable plate 4 to move in the process of completing the upper mold 5 and the lower mold 6. The movable plate 4 moves to drive the connecting rod 15 to move, and the connecting rod 15 drives the fixed seat 14 to move. Since the slider 13 cooperates with the slide groove 8 to guide and limit the movement of the pressing block 10, the pressing block 10 can only move in the vertical direction, so the connecting rod 15 cooperates with the fixed seat 14 to drive the pressing block 10 to move downward. At the end of the mold closing, the lower end of the pressing block 10 is in contact with the upper end of the support block 9, so as to fix the core rod 11 placed on the support block 9, to ensure the stability of the core rod 11 during the blow molding process, and to improve the production quality of the medicinal packaging bag. After the blow molding is completed and the parison is cooled, the electric push rod 3 drives the upper mold 5 to move away from the lower mold 6 to complete the mold opening. During the mold opening process, the movable plate 4 drives the pressing block 10 to move upward through the connecting rod 15 and the fixed seat 14, and releases the fixation of the pressing block 10 to the core rod 11, which is convenient for replacing the core rod 11, thereby improving the efficiency of the blow molding production of the medicinal packaging bag.

[0034] It is further explained that a limiting block 23 is fixedly installed on the outside of the core rod 11, a first limiting groove 16 is opened at the upper end of the support block 9, and a second limiting groove 17 is opened at the lower end of the pressure block 10. The second limiting groove 17 can be adapted to the limiting block 23 after cooperating with the first limiting groove 16.

[0035] When the mold is closed and the pressure block 10 is fitted with the support block 9, the first limiting groove 16 is connected to the second limiting groove 17 and the limiting block 23 is located in the first limiting groove 16 and the second limiting groove 17. The first limiting groove 16 and the second limiting groove 17 limit the position of the limiting block 23, further improving the fixing effect of the core rod 11 between the support block 9 and the pressure block 10, and avoiding the deviation of the core rod 11 during the blow molding process to affect the product effect.

[0036] It is further explained that a cavity 18 is formed on one side of the upper mold 5 and the lower mold 6 , a positioning hole 19 is formed on one side of the lower mold 6 , and a positioning column 20 is fixedly connected to one side of the upper mold 5 , and the positioning column 20 is adapted to the positioning hole 19 .

[0037] After the mold is closed, the cavity 18 on the upper mold 5 and the lower mold 6 forms an integral molding space for the preform. The core rod 11 inputs compressed gas into the cavity 18 to inflate the preform. At this time, the preform is separated from the surface of the core rod 11 and adheres to the inner wall of the cavity 18 to complete the molding of the preform. After the preform is cooled, the electric push rod 3 drives the upper mold 5 to open the mold to obtain a blow-molded medicinal packaging bag product. The positioning hole 19 and the positioning column 20 can effectively avoid the misalignment of the upper mold 5 and the lower mold 6 during the mold closing process, ensuring that the upper mold 5 and the lower mold 6 are aligned and fit to ensure the quality of the blow-molded product.

[0038] It is further explained that the core rod 11 is hollow and has an air outlet 21 on its circumferential surface. The air outlet 21 is arranged on the portion of the core rod 11 located in the cavity 18. A baffle 22 is provided on the outer fixed sleeve of the core rod 11. The position of the baffle 22 is adapted to the opening after the upper mold 5 and the lower mold 6 are closed.

[0039] The hollow setting facilitates the circulation of compressed gas. The external compressed gas enters the core rod 11 and then blows up the parison on the surface of the core rod 11 through the air outlet 21. After the upper mold 5 and the lower mold 6 are closed, the side of the baffle 22 away from the opening of the core rod 11 is in contact with the upper mold 5 and the lower mold 6. The baffle 22 seals the opening after the upper mold 5 and the lower mold 6 are closed to prevent the parison from overflowing from the opening during the blow molding process and affecting the quality of the blow-molded product.

[0040] It is further explained that a slideway 12 is provided at the upper end of the support block 9 , the slideway 12 is communicated with the first limiting groove 16 , and the slideway 12 is matched with the blocking piece 22 .

[0041] The arrangement of the slide 12 ensures that when the mold is opened and the core rod 11 is removed from the interior of the product after the blow molding is completed and the preform is cooled, the baffle 22 fixedly mounted on the core rod 11 will not hinder the movement of the core rod 11, and the core rod 11 can be pulled out backwards when the pressing block 10 no longer restricts the core rod 11, thereby improving the practicability of the device.

[0042] It is further explained that three groups of guide holes 24 are formed on the movable plate 4 , and guide rods 25 are slidably installed in the three groups of guide holes 24 . The guide rods 25 are fixedly connected between the mounting plate 2 and the fixed plate 7 .

[0043] The guide hole 24 cooperates with the guide rod 25 to guide and limit the movement of the movable plate 4, thereby improving the stability of the movable plate 4 when driving the upper mold 5 to move, and further improving the alignment and fit of the upper mold 5 and the lower mold 6 when closing the mold.

[0044] The specific operation is as follows: the molten material is fixed on the outer surface of the core rod 11 by an external injection molding machine to form a preform, the core rod 11 is placed on the support block 9, the limiting block 23 is in the first limiting groove 16, the electric push rod 3 is started, the electric push rod 3 drives the moving plate 4 to move, the moving plate 4 drives the upper mold 5 to move, so that the upper mold 5 and the lower mold 6 are fitted, at this time the core rod 11 is located in the cavity 18 of the upper mold 5 and the lower mold 6, and compressed gas is passed through the core rod 11 by external equipment, and the compressed gas enters the core rod 11 The parison on the surface of the core rod 11 is then inflated through the air outlet 21, and the parison is separated from the surface of the core rod 11 and adheres closely to the inner wall of the cavity 18 to complete the shaping of the parison. After the parison is cooled, the electric push rod 3 drives the upper mold 5 to open the mold to obtain a blow-molded medicinal packaging bag product. The electric push rod 3 drives the upper mold 5 to move away from the lower mold 6 to complete the mold opening. During the mold opening process, the movable plate 4 drives the pressure block 10 to move upward through the connecting rod 15 and the fixed seat 14, thereby releasing the fixation of the pressure block 10 to the core rod 11, making it convenient to replace the core rod 11.

[0045] The standard parts used in the utility model can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0046] Although the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blow molding mold for a medicinal packaging bag, characterized in that: The invention comprises a base (1), a mounting plate (2) is fixedly mounted on the base (1), two groups of electric push rods (3) are fixedly mounted on one side of the mounting plate (2), a movable plate (4) is fixedly connected to the driving shafts of the two groups of electric push rods (3), an upper mold (5) is fixedly mounted on one side of the movable plate (4), a fixed plate (7) is fixedly mounted on the base (1), a lower mold (6) is fixedly connected to one side of the fixed plate (7), the lower mold (6) is matched with the upper mold (5), a supporting block (9) is fixedly mounted on the base (1), a core rod (11) is placed on the supporting block (9), a pressing block (10) is arranged on the core rod (11), the pressing block (10) is matched with the supporting block (9), and the pressing block (10) is movably connected to the side of the movable plate (4).

2. The blow molding mold for a medicinal packaging bag according to claim 1, characterized in that: A slide groove (8) is provided on one side of the fixed plate (7), a slider (13) is slidably installed inside the slide groove (8), one side of the slider (13) is fixedly connected to the side of the pressing block (10), a fixing seat (14) is fixedly installed on the pressing block (10), a connecting rod (15) is rotatably installed on the fixing seat (14), and one end of the connecting rod (15) away from the fixing seat (14) is rotatably installed on the side of the movable plate (4).

3. The blow molding mold for a medicinal packaging bag according to claim 2, characterized in that: A limiting block (23) is fixedly installed on the outside of the core rod (11), a first limiting groove (16) is opened at the upper end of the support block (9), and a second limiting groove (17) is opened at the lower end of the pressure block (10), and the second limiting groove (17) can be matched with the limiting block (23) after matching with the first limiting groove (16).

4. The blow molding mold for a medicinal packaging bag according to claim 3, characterized in that: A cavity (18) is provided on one side of the upper mold (5) and the lower mold (6), and a positioning hole (19) is provided on one side of the lower mold (6). A positioning column (20) is fixedly connected to one side of the upper mold (5), and the positioning column (20) is adapted to the positioning hole (19).

5. The blow molding mold for a medicinal packaging bag according to claim 4, characterized in that: The core rod (11) is hollow, an air outlet hole (21) is provided on the circumferential surface of the core rod (11), and a baffle (22) is fixedly sleeved outside the core rod (11).

6. The blow molding mold for a medicinal packaging bag according to claim 5, characterized in that: A slideway (12) is provided at the upper end of the support block (9), the slideway (12) is connected to the first limiting groove (16), and the slideway (12) is matched with the blocking piece (22).

7. The blow molding mold for a medicinal packaging bag according to claim 6, characterized in that: The movable plate (4) is provided with three groups of guide holes (24), and guide rods (25) are slidably installed in the three groups of guide holes (24). The guide rods (25) are fixedly connected between the mounting plate (2) and the fixed plate (7).

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