Multi-cavity production die for light-weight pull ring combined cover product

Abstract

The utility model discloses a multi-cavity production die for a lightweight pull ring combined cover product. The multi-cavity production die comprises an outer cover production die and an inner cover production die, the inner cover production mold comprises a first sprue mold core, a first cavity, a first push sleeve, a connecting sleeve and a first mold core, a glue injection port is formed in the first end of the first sprue mold core, the first cavity is formed outside the first sprue mold core, the first mold core is arranged at the end, away from the sprue mold core, of the cavity, and the connecting sleeve is arranged at the end, away from the first sprue mold core, of the first mold core; a first forming cavity of the inner cover is formed among the first sprue mold core, the first cavity, the first push sleeve and the first mold core; the size of the inner cover and the size of the outer cover are adjusted on the basis of a mature combined cover, on the premise that normal functions of the combined cover are guaranteed, the size of the combined cover is integrally reduced, raw materials needed by a single combined cover during production are reduced, production cost is reduced, production efficiency is improved, and production cost is reduced. The light weight of the combined cover is achieved, and meanwhile the environment-friendly performance of production is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and particularly relates to a multi-cavity production mold for lightweight pull-ring combined caps. Background Art

[0002] With the wide application of infusion therapy in the medical field, the packaging supplies of large infusion pull-ring combined caps have been continuously updated. The existing pull-ring combined caps are also very mature in various functional tests and use performances. However, the previously used molds for pull-ring combined caps all produce pull-ring combined caps with large weights, and their sales volume reaches tens of billions per year. The large-weight pull-ring combined caps cause a large amount of raw material waste and are not conducive to environmental protection.

[0003] In summary, the pull-ring combined caps produced by the existing multi-cavity production molds for lightweight pull-ring combined cap products can no longer meet the production requirements of lightweight and environmental protection. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a multi-cavity production mold for lightweight pull-ring combined cap products. On the basis of the mature combined cap, the sizes of the inner cap and the outer cap are adjusted. On the premise of ensuring the normal functions of the combined cap, the overall size is reduced, the raw materials required for a single combined cap during production are reduced, and the lightweight of the combined cap is realized while ensuring the environmental protection of production.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] A multi-cavity production mold for lightweight pull-ring combined cap products, comprising an outer cap production mold and an inner cap production mold;

[0007] The inner cap production mold includes a first gate die core, a first cavity, a first push sleeve, a connecting sleeve and a first core. A glue injection port is provided at the first end of the first gate die core. The first cavity is arranged outside the first gate die core. The first core is arranged at the end of the cavity far from the gate die core. The first push sleeve is arranged outside the first core. The connecting sleeve is arranged at the end of the first core far from the first gate die core. A first forming cavity for the inner cap is formed among the first gate die core, the first cavity, the first push sleeve and the first core;

[0008] The outer cap production mold includes a second gate die core, a second cavity, a second push sleeve, an inner core and an outer core. A glue injection port is provided at the first end of the second gate die core. The second cavity is arranged outside the second gate die core. The outer core is arranged at the end of the cavity far from the gate die core. The second push sleeve is arranged outside the outer core. The inner core is arranged inside the outer core. A second forming cavity for the outer cap is formed among the second gate die core, the second cavity, the second push sleeve, the outer core and the inner core;

[0009] The pull-ring combination cap includes an outer cap and an inner cap disposed inside the outer cap. A rubber stopper is provided between the outer cap and the inner cap. After the inner cap, the rubber stopper, and the outer cap are assembled, they are fixed to the mouth of the infusion bottle. A clamping portion for connecting the inner cap is provided at the bottom of the outer cap, and a pull ring is provided at the top of the outer cap body. A clamping platform that engages with the clamping portion is provided on the outer wall of the inner cap.

[0010] The ratio of the height of the side wall of the outer cap to the inner diameter of the mouth of the infusion bottle preform is 0.60 - 0.75, and the ratio of the overall height of the outer cap to the inner diameter of the mouth of the infusion bottle preform is 0.80 - 0.85.

[0011] The ratio of the inner diameter of the outer cap to the inner diameter of the mouth of the infusion bottle preform is 1.10 - 1.30, the ratio of the outer diameter of the outer cap to the inner diameter of the mouth of the infusion bottle preform is 1.10 - 1.50, and the ratio of the diameter of the pull ring to the inner diameter of the mouth of the infusion bottle preform is 0.90 - 1.00.

[0012] The ratio of the inner diameter of the inner cap to the inner diameter of the mouth of the infusion bottle preform is 1.01 - 1.10, and the ratio of the outer diameter of the inner cap to the inner diameter of the mouth of the infusion bottle preform is 1.00 - 1.20.

[0013] Further, an assembly cavity for assembling the rubber stopper is formed between the inner cap and the outer cap.

[0014] Further, the diameter of the assembly cavity is 0.1 mm - 0.3 mm larger than the diameter of the rubber stopper.

[0015] Further, the dimension of the rubber stopper in the thickness direction is 0.5 - 0.6 mm larger than the height of the assembly cavity.

[0016] Further, the diameter of the assembly cavity is 0.2 mm - 0.4 mm smaller than the diameter of the rubber stopper.

[0017] Further, the dimension of the rubber stopper in the thickness direction is 0.3 - 0.4 mm larger than the height of the assembly cavity.

[0018] Further, the inner cap is fixed to the infusion bottle preform by welding, and an inner welding line is formed at the connection part between the inner cap and the infusion bottle preform. The outer cap is fixed to the infusion bottle preform by welding, and an outer welding line is formed at the connection part between the outer cap and the infusion bottle preform.

[0019] The diameter of the inner welding line is 2.5 mm - 3 mm larger than the inner diameter of the infusion bottle preform.

[0020] The diameter of the outer welding line is 3 mm - 3.5 mm smaller than the outer diameter of the infusion bottle preform.

[0021] Further, the width of the inner welding line is 0.3 mm - 0.5 mm.

[0022] The width of the outer welding line is 0.7 mm - 1 mm.

[0023] Furthermore, the inner welding line is 0.1 mm - 0.2 mm higher than the outer welding line.

[0024] The beneficial effects of the present utility model are as follows:

[0025] Based on the mature combined cap, the dimensions of the inner cap and the outer cap are adjusted. On the premise of ensuring the normal functions of the combined cap, the overall dimensions are reduced, the raw materials required for a single combined cap during production are decreased, and while achieving the lightweight of the combined cap, the environmental protection of production is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the outer cap generation mold of the multi-cavity production mold for the lightweight pull-ring combined cap product in the embodiment of the present utility model;

[0027] Figure 2 It is a schematic structural diagram of the inner cap generation mold;

[0028] Figure 3 It is a schematic assembly structure diagram of the inner cap, the outer cap, and the rubber plug;

[0029] Figure 4 It is a schematic diagram when the inner cap and the outer cap are welded to the bottle preform;

[0030] Figure 5 It is a schematic structural diagram of the outer cap;

[0031] Figure 6 It is a schematic structural diagram of the inner cap;

[0032] In the figure, 1. Outer cap production mold; 2. Inner cap production mold; 3. First gate mold core; 4. First cavity; 5. First push sleeve; 6. First core; 7. Second gate mold core; 8. Second cavity; 9. Second push sleeve; 10. Inner core; 11. Outer core; 12. Connecting sleeve; 13. Outer cap; 14. Inner cap; 15. Rubber plug; 16. Clamping portion; 17. Clamping platform; 18. Pull ring; 19. Assembly cavity; 20. Inner welding line; 21. Outer welding line. SPECIFIC EMBODIMENTS

[0033] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present utility model.

[0034] Refer to Figures 1 - 6 , the present utility model provides a technical solution:

[0035] Embodiment 1:

[0036] As Figures 1 - 6 shown, a multi-cavity production mold for a lightweight pull-tab combination cap product includes an outer cap production mold 1 and an inner cap production mold 2;

[0037] As Figure 2 shown, the inner cap production mold 2 includes a first gate core 3, a first cavity 4, a first push sleeve 5, a connecting sleeve 12 and a first core 6. A glue injection port is provided at the first end of the first gate core 3. The first cavity 4 is arranged outside the first gate core 3. The first core 6 is arranged at one end of the cavity away from the gate core. The first push sleeve 5 is arranged outside the first core 6. The connecting sleeve 12 is arranged at one end of the first core 6 away from the first gate core 3. A first forming cavity for the inner cap is formed among the first gate core 3, the first cavity 4, the first push sleeve 5 and the first core 6;

[0038] As Figure 1 shown, the outer cap production mold 1 includes a second gate core 7, a second cavity 8, a second push sleeve 9, an inner core 10 and an outer core 11. A glue injection port is provided at the first end of the second gate core 7. The second cavity 8 is arranged outside the second gate core 7. The outer core 11 is arranged at one end of the cavity away from the gate core. The second push sleeve 9 is arranged outside the outer core 11. The inner core 10 is arranged inside the outer core 11. A second forming cavity for the outer cap is formed among the second gate core 7, the second cavity 8, the second push sleeve 9, the outer core 11 and the inner core 10;

[0039] As Figures 3 - 6 shown, the pull-tab 18 combination cap includes an outer cap and an inner cap arranged inside the outer cap. A rubber plug 15 is arranged between the outer cap and the inner cap. After the inner cap, the rubber plug 15 and the outer cap are assembled, they are fixed to the mouth of the infusion bottle. A clamping portion 16 for connecting the inner cap is provided at the bottom of the outer cap. A pull-tab 18 is provided at the top of the outer cap body. A clamping platform 17 that is buckled with the clamping portion 16 is provided on the outer wall of the inner cap;

[0040] The ratio of the side wall height of the outer cover 13 (10.5 mm in this embodiment) to the overall height of the outer cover 13 (13.4 mm) is 0.7836; the ratio of the side wall height of the outer cover to the inner diameter of the bottle mouth of the infusion bottle preform is 0.656, and the ratio of the overall height of the outer cover to the inner diameter of the bottle mouth of the infusion bottle preform is 0.837. (In the prior art, the ratio of the side wall height of the outer cover to the overall height of the outer cover is 0.792, with a side wall height of 12.2 mm and an overall height of 15.4). The inner diameter of the outer cover 13 (19.01 mm) (the inner diameter of the outer cover 13 in the prior art is 20.09 mm) to the inner diameter of the bottle mouth of the infusion bottle preform (16 mm) is 1.188. The outer diameter of the outer cover 13 (21.5 mm) (the outer diameter of the outer cover 13 in the prior art is 22.75 mm) to the inner diameter of the bottle mouth of the infusion bottle preform is 1.343. The diameter of the pull ring 18 (15.5 mm) (the pull ring diameter in the prior art is 15.77 mm) to the inner diameter of the bottle mouth of the infusion bottle preform is 0.9688;

[0041] The inner diameter of the inner cover 14 (16.51 mm) (the inner diameter of the inner cover in the prior art is 17.79 mm) to the inner diameter of the bottle mouth of the infusion bottle preform is 1.032. The outer diameter of the inner cover 14 (19.02 mm) (the outer diameter of the inner cover in the prior art is 20.05 mm) to the inner diameter of the bottle mouth of the infusion bottle preform is 1.188. The height of the inner cover 14 is reduced by 21.39% compared to the height of the inner cover 14 in the prior art.

[0042] An assembly cavity 19 for assembling the rubber stopper 15 is formed between the inner cover 14 and the outer cover 13.

[0043] Based on the mature combined cap, the present utility model adjusts the sizes of the inner cover and the outer cover. On the premise of ensuring the normal functions of the combined cap, its overall size is reduced, the raw materials required for a single combined cap during production are reduced, and while achieving the lightweight of the combined cap, the environmental protection of production is ensured.

[0044] Among them, the size adjustment is as follows: reducing the inner and outer diameters of the outer cover, reducing the side wall height of the outer cover, and the wall thickness of the outer cover side wall; reducing the overall height of the inner cover.

[0045] Example 2:

[0046] Based on Example 1, in this embodiment, the diameter of the assembly cavity 19 is 0.1 mm - 0.2 mm larger than the diameter of the rubber stopper 15.

[0047] The dimension in the thickness direction of the rubber stopper 15 is 0.5 - 0.6 mm larger than the height of the assembly cavity 19.

[0048] In this embodiment, by reserving an extrusion space and controlling the extrusion amount of the inner and outer covers and the rubber stopper 15 through two-stage extrusion, specifically:

[0049] 1. First-stage extrusion. The diameter of the cavity inside the outer cover for installing the rubber plug 15 should be 0.1 mm - 0.2 mm larger than the diameter of the rubber plug 15, reserving extrusion space for the subsequent two-stage extrusion of the rubber plug 15. (See Figure 3 the marked dimension x1, where x1 = 0.05 mm)

[0050] 2. Second-stage extrusion. The thickness of the rubber plug 15 should be 0.5 mm - 0.6 mm larger than the space height after the combination of the inner and outer covers. Extrusion is formed on the thickness of the rubber plug 15. (See Figure 3 the marked dimensions x2 and x3, where x2 = 0.2 mm and x3 = 0.3 mm)

[0051] 3. Third-stage extrusion. The thickness of the groove of the rubber plug 15 should be 0.2 mm - 0.3 mm larger than the space height of the liquid-sealing groove after the combination of the inner and outer covers. Extrusion is formed on the thickness of the rubber plug 15. (See Figure 3 the marked dimensions x4 and x5, where x4 = 0.08 mm and x5 = 0.1 mm).

[0052] Through the above settings, it can be ensured that the extrusion amount meets the usage requirements, avoiding the liquid leakage problem caused by insufficient / too small extrusion amount of the rubber plug 15, or the problems of: when the puncture needle enters the rubber plug 15, too large extrusion amount will directly squeeze out the needle and the large puncture force due to too large extrusion amount of the rubber plug 15.

[0053] Example 3:

[0054] The difference between this example and Example 2 is that the diameter of the assembly cavity 19 is 0.2 mm - 0.4 mm smaller than the diameter of the rubber plug 15.

[0055] Furthermore, the dimension in the thickness direction of the rubber plug 15 is 0.3 - 0.4 mm larger than the height of the assembly cavity 19.

[0056] In this example, by reserving extrusion space and controlling the extrusion amount of the inner and outer covers and the rubber plug 15 through two-stage extrusion, specifically:

[0057] 1. First-stage extrusion. The diameter of the cavity inside the outer cover for installing the rubber plug 15 should be 0.2 mm - 0.4 mm smaller than the diameter of the rubber plug 15, forming extrusion on the diameter of the rubber plug 15 (see Figure 3 the marked dimension x1).

[0058] 2. Second-stage extrusion. The thickness of the rubber plug 15 should be 0.3 mm - 0.4 mm larger than the space height after the combination of the inner and outer covers. Extrusion is formed on the thickness of the rubber plug 15 (see Figure 3 the marked dimensions x2 and x3).

[0059] 3. Third-stage extrusion. The thickness of the groove of the rubber plug 15 should be 0.2 mm - 0.3 mm larger than the space height of the liquid-sealing groove after the combination of the inner and outer covers. Extrusion is formed on the thickness of the rubber plug 15. (SeeFigure 3 at the marked dimensions x4 and x5).

[0060] The extrusion amount control methods in Example 2 and Example 3 are both suitable for the existing extrusion requirements of the combined cap.

[0061] Example 4:

[0062] Based on Example 2 or Example 3, in this example, the inner cap is fixedly welded to the infusion bottle preform, and an inner welding line 20 is formed at the connecting part between the inner cap and the infusion bottle preform; the outer cap is fixedly welded to the infusion bottle preform, and an outer welding line 21 is formed at the connecting part between the outer cap and the infusion bottle preform;

[0063] The diameter of the inner welding line 20 is greater than the inner diameter of the infusion bottle preform by 2.5 mm - 3 mm (as shown by a in Figure 4);

[0064] The diameter of the outer welding line 21 is less than the outer diameter of the infusion bottle preform by 3 mm - 3.5 mm (as shown by b in Figure 4);

[0065] The width of the inner welding line 20 is 0.3 mm - 0.5 mm;

[0066] The width of the outer welding line 21 is 0.7 mm - 1 mm.

[0067] The inner welding line 20 is 0.1 mm - 0.2 mm higher than the outer welding line.

[0068] Before the pull ring 18 inner and outer combined cap is welded to the preform, the rubber stopper 15 is first placed into the inner cavity of the outer cap, then the inner cap is inserted into the outer cap, and the inner cap is clamped tightly by the internal retaining position of the outer cap, forming an extrusion on the rubber stopper 15.

[0069] 1. If the distance between the diameter of the inner welding line and the inner hole of the preform is too close, during welding, due to the too fast welding speed and the dimensional error between the manipulator and the product, the outer diameter of the combined cap cannot be accurately positioned with the outer circle of the preform (the concentricity is insufficient), resulting in partial welding. At this time, the inner hole is no longer a perfect circle, affecting puncture and contaminating the drug.

[0070] 2. If the distance between the diameter of the inner welding line and the inner hole of the preform is too far, it will affect the sol accumulation space after the combined cap is welded.

[0071] 3. If the width of the inner welding line is too narrow, after the inner cap is assembled, the welding line will be 0.1 mm - 0.2 mm higher than the outer welding line. Therefore, under high-temperature welding, the inner cap is instantaneously melted during welding, ultimately forming a virtual weld and resulting in liquid leakage.

[0072] 4. If the width of the inner welding line is too wide, it cannot be completely melted in a short time, and it will also form a virtual weld and result in liquid leakage.

[0073] 5. If the distance between the outer welding line diameter and the outer circle of the preform is too close, the rubber material will overflow after welding, affecting the appearance and causing side welding (the same as the first point), resulting in liquid leakage.

[0074] 6. If the distance between the outer welding line diameter and the outer circle of the preform is too far, it will affect the sol accumulation space after the combined cap is welded. Among them, Figure 4 The Q position is the sol accumulation space.

[0075] 7. If the width of the outer welding line is too narrow, it will not play an outer sealing role after welding.

[0076] 8. If the width of the outer welding line is too wide, it cannot be completely melted in a short time, and it will also form false welding, resulting in phenomena such as mold growth, and it will also affect the appearance.

[0077] 9. Explanation of the inner welding line being higher than the outer welding line. When the combined cap is welded to the preform, factors such as the deformation of the product after production and the deformation caused by the extrusion of the rubber stopper after assembly need to be fully considered. To ensure that there is no liquid leakage after the combined cap and the preform are welded, the first position of liquid leakage, that is, the bottle mouth, must be solved first. Since the welding line of the inner cap first touches the heating plate and is melted, and the welding line of the outer cap delays touching the heating plate and is melted, during welding, the welding line of the combined cap and the preform are integrated.

[0078] The above are only the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described herein through the above teachings or the technology or knowledge in related fields. And the changes and modifications made by those skilled in the art that do not depart from the spirit and scope of the present invention should all be within the protection scope of the appended claims of the present invention.

Claims

1. A multi-cavity production mold for a lightweight pull-ring combination cover product, characterized in that: It includes an outer cover production mold and an inner cover production mold; The inner cover production mold comprises a first gate mold core, a first cavity, a first push sleeve, a connecting sleeve and a first core, a first end of the first gate mold core is provided with a glue injection port, the first cavity is arranged outside the first gate mold core, the first core is arranged at an end of the cavity away from the gate mold core, the first push sleeve is arranged outside the first core, and the connecting sleeve is arranged at an end of the first core away from the first gate mold core; a first molding cavity of the inner cover is formed between the first gate mold core, the first cavity, the first push sleeve and the first core; The outer cover production mold comprises a second gate mold core, a second cavity, a second push sleeve, an inner core and an outer core, a first end of the second gate mold core is provided with a glue injection port, the second cavity is arranged outside the second gate mold core, the outer core is arranged at an end of the cavity away from the gate mold core, the second push sleeve is arranged outside the outer core, and the inner core is arranged inside the outer core; a second molding cavity of the outer cover is formed between the second gate mold core, the second cavity, the second push sleeve, the outer core and the inner core; The pull ring assembly cover comprises an outer cover and an inner cover arranged inside the outer cover, a rubber plug is arranged between the outer cover and the inner cover; the inner cover, the rubber plug and the outer cover are assembled and fixed to the mouth of the infusion bottle; a clamping part for connecting the inner cover is arranged at the bottom of the outer cover, a pull ring is arranged at the top of the outer cover body, and a clamping platform buckled with the clamping part is arranged on the outer wall of the inner cover; The ratio of the side wall height of the outer cover to the inner diameter of the bottle mouth of the infusion bottle preform is 0.60-0.75, and the ratio of the overall height of the outer cover to the inner diameter of the bottle mouth of the infusion bottle preform is 0.80-0.85; The ratio of the inner diameter of the outer cover to the inner diameter of the bottle mouth of the infusion bottle preform is 1.10-1.30, the ratio of the outer diameter of the outer cover to the inner diameter of the bottle mouth of the infusion bottle preform is 1.10-1.50, and the ratio of the pull ring diameter to the inner diameter of the bottle mouth of the infusion bottle preform is 0.90-1.00; The ratio of the inner diameter of the inner cap to the inner diameter of the bottle mouth of the infusion bottle preform is 1.01-1.10, and the ratio of the outer diameter of the inner cap to the inner diameter of the bottle mouth of the infusion bottle preform is 1.00-1.

20.

2. According to claim 1, the multi-cavity production mold for lightweight pull ring combination cover products is characterized by: An assembly cavity for assembling the rubber plug is formed between the inner cover and the outer cover.

3. The multi-cavity production mold for lightweight pull-ring assembly cover products according to claim 2, characterized in that: The diameter of the assembly cavity is 0.1 mm to 0.3 mm larger than the diameter of the rubber plug.

4. The multi-cavity production mold for lightweight pull-ring assembly cover products according to claim 3, characterized in that: The thickness dimension of the rubber plug is 0.5-0.6 mm greater than the height of the assembly cavity.

5. The multi-cavity production mold for lightweight pull-ring assembly cover products according to claim 2, characterized in that: The diameter of the assembly cavity is 0.2 mm to 0.4 mm smaller than the diameter of the rubber plug.

6. The multi-cavity production mold for lightweight pull-ring assembly cover products according to claim 5, characterized in that: The thickness dimension of the rubber plug is 0.3-0.4 mm greater than the height of the assembly cavity.

7. The multi-cavity production mold for lightweight pull-ring assembly cover products according to claim 1, characterized in that: The inner cover is welded and fixed to the infusion bottle embryo, and the connection between the inner cover and the infusion bottle embryo forms an inner welding line; the outer cover is welded and fixed to the infusion bottle embryo, and the connection between the outer cover and the infusion bottle embryo forms an outer welding line; The diameter of the inner welding line is 2.5mm-3mm larger than the inner diameter of the infusion bottle embryo; The diameter of the outer welding line is 3 mm to 3.5 mm smaller than the outer diameter of the infusion bottle embryo.

8. The multi-cavity production mold for lightweight pull-ring assembly cover products according to claim 7, characterized in that: The inner welding line width is 0.3mm-0.5mm; The outer welding line width is 0.7mm-1mm.

9. The multi-cavity production mold for lightweight pull-ring assembly cover products according to claim 8, characterized in that: The inner welding line is 0.1 mm to 0.2 mm higher than the outer welding line.

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