Structure for removing foreign matters on medicine packing material injection blow molding product and injection blow molding mold

Abstract

The utility model provides a structure for removing foreign matters on a medicine packing material injection blow-molded product and an injection blow-molded mold, the structure for removing foreign matters on the medicine packing material injection blow-molded product comprises an upper blow-molded mold assembly provided with an upper neck blowing block, a lower blow-molded mold assembly provided with a lower neck blowing block, and a plurality of blow-molded cavities, a parison cavity communicated with the blow molding cavity is formed between the upper neck blowing block and the lower neck blowing block, and a circulating air path is arranged on the peripheral side of the parison cavity; an air blowing pipeline and an air outlet chip removal pipeline which are independent from each other are mounted in at least one of the upper blowing mold assembly and the lower blowing mold assembly; an air blowing channel and an air outlet chip removal channel which are mutually independent are formed in at least one of the upper neck blowing block and the lower neck blowing block; the air blowing pipeline, the air blowing channel and the circulating air channel are sequentially communicated, and the circulating air channel, the air outlet chip removal channel and the air blowing pipeline are sequentially communicated. According to the device, the foreign matter in the parison cavity is automatically removed and discharged, time and labor are saved, efficiency is high, and it is ensured that each medicine packing material product is automatically blown and washed clean.

Description

Technical Field

[0001] The utility model relates to the technical field of injection-blow molds, in particular to a foreign matter removal structure on a medicine packaging material injection-blow product, and an injection-blow molding mold comprising the foreign matter removal structure on the medicine packaging material injection-blow product. Background Art

[0002] In the field of pharmaceutical packaging material processing and manufacturing, low-density polyethylene eye drop bottles or polypropylene eye drop bottles usually have two common processing and molding processes: extrusion-blow molding and injection-blow molding. When using the injection-blow molding (hereinafter referred to as "injection-blow") process to produce eye drop bottles, the thicker and threaded bottle mouth of the eye drop bottle is first injection molded, and then the bottle body of the eye drop bottle is blow molded, thereby obtaining an eye drop bottle with high dimensional accuracy and a more exquisite product appearance. Moreover, the injection-blow molding process has a large number of cavities and high production efficiency. Therefore, the injection-blow molding process has been widely used in the field of eye drop bottle production.

[0003] Typically, eye drop bottles are used as pharmaceutical packaging materials for various sterile eye drops, which are administered intraocularly. These bottles place high demands on their appearance. The entire eye drop bottle system is generally required to have smooth, uniformly colored, free of loose particles and visible foreign matter. However, eye drop bottles are typically made from raw material particles such as polyethylene and polypropylene, with a small amount of additives such as masterbatch, and are then injection-blow molded using injection-blow molding equipment at high temperatures. For example, a plastic bottle is disclosed in Chinese invention patent application number CN202210647318.3. During the molding process, because the raw materials must contain a small amount of additives such as color powder and BHT antioxidant, when large-scale injection-blow molding is performed, after the plastic melts and cools and crystallizes, some fine particles gradually adhere to the blow neck of the injection and blow molds, forming white specks such as plastic material scraps. These white powder specks are primarily concentrated on the mold surface at the screw thread of the eye drop bottle mouth (i.e., the injection molding portion). These white dots are small powders. Because of their light weight, they are easily adsorbed by static electricity onto the eye drop bottle. In serious cases, they may be mixed into the eye drop solution, affecting product quality.

[0004] Currently, to ensure that there are no visible foreign matter on the eye drop bottle products and the injection blow molding molds, the current practice is to frequently clean the injection blow molding molds manually and manually select the eye drop bottle products. This is time-consuming and labor-intensive, and cannot ensure that every product is clean. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a foreign matter removal structure on injection-blow products of medicine packaging materials, which can effectively discharge foreign matter on the mold surface.

[0006] To achieve the above-mentioned object, the utility model provides a foreign matter removal structure on a blow-molded product of a pharmaceutical packaging material, comprising a blow mold for blow-molding the pharmaceutical packaging material, the blow mold comprising an upper blow mold assembly and a lower blow mold assembly that can be opened and closed, and a plurality of blow molding cavities formed between the upper blow mold assembly and the lower blow mold assembly, the upper blow mold assembly being fixedly provided with an upper blow neck block at the end of each blow molding cavity, the lower blow mold assembly being fixedly provided with a lower blow neck block at the end of each blow molding cavity, a parison cavity for accommodating an injection-molded portion of the pharmaceutical packaging material and communicating with the blow molding cavity being formed between the upper blow neck block and the lower blow neck block, the upper blow neck block and the lower blow neck block both being provided with a circulating air path on the outer peripheral side of the parison cavity;

[0007] At least one of the upper blow mold assembly and the lower blow mold assembly is installed with a mutually independent air blowing pipeline and an air outlet and chip removal pipeline; at least one of the upper blow neck block and the lower blow neck block is provided with a mutually independent air blowing channel and an air outlet and chip removal channel inside; the air blowing pipeline, the air blowing channel and the circulating air path are connected in sequence, and the circulating air path, the air outlet and chip removal channel and the air blowing pipeline are connected in sequence.

[0008] Furthermore, the upper blowing neck block and the lower blowing neck block are both provided with an air avoidance area on the cavity wall of the preform cavity, and the air avoidance area constitutes a circulating air path, the end of the blowing channel is a blowing hole provided on the cavity wall of the preform cavity, and the end of the air exhaust and chip removal channel is an air exhaust and chip removal hole provided on the cavity wall of the preform cavity, and the blowing holes and the air exhaust and chip removal holes are staggered along the circumference of the preform cavity.

[0009] Furthermore, blowing channels are provided in both the upper blowing neck block and the lower blowing neck block; the blowing channels include a main blowing channel extending up and down, a first blowing channel symmetrically connected on both sides of the main blowing channel, and several second blowing channels distributed at intervals along the axial direction of the preform cavity, the inlet end of the main blowing channel is connected to the blowing pipeline, the last section of the first blowing channel away from the main blowing channel extends straight along the axial direction of the preform cavity and is connected with several second blowing channels, the last section of the second blowing channel away from the first blowing channel extends straight along the radial direction of the preform cavity, and both extend to the circulating air path.

[0010] Furthermore, the upper blow mold assembly and the lower blow mold assembly are both installed with blowing pipelines;

[0011] The blowing pipeline in the upper blow mold assembly includes an upper blowing main pipe extending straight along the side-by-side direction of the plurality of blow molding cavities, and upper blowing branch pipes corresponding to each upper blowing neck block one by one, the upper blowing branch pipes extending up and down, and the upper and lower ends of the upper blowing branch pipes being connected to the upper blowing main pipe and the blowing main channel in the upper blowing neck block respectively;

[0012] The blowing pipeline in the lower blow mold assembly includes a lower blowing main pipe extending straight along the side-by-side direction of several blow molding cavities, and a lower blowing branch pipe corresponding to each lower blowing neck block one by one. The lower blowing branch pipes extend up and down, and the lower end and upper end of the lower blowing branch pipe are respectively connected to the lower blowing main pipe and the blowing main channel in the lower blowing neck block.

[0013] Furthermore, both the upper blowing neck block and the lower blowing neck block are provided with air outlet and chip removal channels; there are two groups of air outlet and chip removal channels, which are symmetrically arranged; each group of air outlet and chip removal channels includes a first air outlet and chip removal main channel extending up and down, a second air outlet and chip removal main channel extending straight along the axial direction of the blank cavity, a main channel connecting section connected between the first air outlet and chip removal main channel and the second air outlet and chip removal main channel, and several air outlet and chip removal branch channels distributed at intervals along the axial direction of the blank cavity, one end of the several air outlet and chip removal branch channels extends to the circulating air path, and the other end is connected to the second air outlet and chip removal main channel, and the outlet end of the first air outlet and chip removal main channel is connected to the air outlet and chip removal pipeline.

[0014] Furthermore, both the upper blow mold assembly and the lower blow mold assembly are equipped with air exhaust and chip removal pipelines;

[0015] There are multiple gas outlet and chip removal pipelines in the upper blowing mold assembly, which correspond to the upper blowing neck blocks one by one and are connected to the first gas outlet and chip removal main channel in the upper blowing neck blocks;

[0016] There are multiple air outlet and chip removal pipelines in the lower blowing mold assembly, which correspond to the lower blowing neck blocks one by one and are connected to the first air outlet and chip removal main channel in the lower blowing neck blocks.

[0017] Furthermore, the foreign matter removal structure on the medicine packaging material injection-blown product also includes a filtering device, and one end of each of the air outlet and chip removal pipelines away from the first air outlet and chip removal main channel is connected to the filtering device through a quick connector.

[0018] Furthermore, the upper blow mold assembly includes an upper blow mold plate that can move reciprocatingly up and down, an upper blow mold core fixed at the bottom of the upper blow mold plate, and a guide sleeve fixed in the upper blow mold plate, and the upper blow neck block is fixed at the bottom of the upper blow mold core; the lower blow mold assembly includes a fixed lower blow mold plate, a lower blow mold core fixed at the top of the lower blow mold plate, and a guide column fixed to the lower blow mold plate, and the lower blow neck block is fixed at the top of the lower blow mold core; the guide column is inserted into the guide sleeve, and the two are slidably matched, and the blow molding cavity is formed between the upper blow mold core and the lower blow mold core.

[0019] Furthermore, the upper blowing neck block and the lower blowing neck block are both 3D printed parts.

[0020] The utility model also provides an injection blow molding mold, including an injection mold for injection molding the threaded portion of the bottle mouth of the medicine packaging material, and a blow mold for blow molding the bottle body of the medicine packaging material. The blow mold is equipped with the foreign matter removal structure on the medicine packaging material injection blow product as described above.

[0021] As described above, the foreign matter removal structure and injection-blow molding die for the medicine packaging material injection-blow molding product of the present invention have the following beneficial effects:

[0022] In the present application, after configuring an air blowing line, an air outlet and chip removal line, an air blowing channel, and an air outlet and chip removal channel in the blow mold, the air blowing line and the air outlet and chip removal channel are used to blow air into the circulating air path to form an air flow, thereby driving foreign matter such as white powder on the surface of the preform cavity into the air outlet and chip removal channel, and then discharged through the air outlet and chip removal line. Compared with the existing method of manually cleaning the mold surface and selecting pharmaceutical packaging products, the present application realizes the automatic removal and discharge of foreign matter in the preform cavity, which saves time and effort and is highly efficient. In particular, it can reliably prevent foreign matter such as white powder from adhering to the pharmaceutical packaging products or even mixing into the pharmaceutical packaging products, effectively ensuring that each pharmaceutical packaging product is clean, and ultimately significantly improving product quality and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a blow mold configured with a foreign body removal structure for injection-blow products of pharmaceutical packaging materials according to this application.

[0024] Figure 2 for Figure 1 main view.

[0025] Figure 3 for Figure 2 AA section view.

[0026] Figure 4 for Figure 1 Schematic diagram of the structure of the middle and upper blow mold assembly from another perspective.

[0027] Figure 5 for Figure 1 Schematic diagram of the structure of the middle and lower blow mold assembly from another perspective.

[0028] Figure 6 for Figure 1 Schematic diagram of the structure at the positioning holes and positioning columns.

[0029] Figure 7 and Figure 8 Schematic diagram of the structure of the upper blowing neck block or the lower blowing neck block in this application at different viewing angles.

[0030] Figure 9 This is a schematic diagram of the connection between the air blowing pipeline and the air exhaust and chip removal pipeline and the upper blowing neck block or the lower blowing neck block in this application, and the blowing direction is shown in the figure.

[0031] Figure 10 This is a schematic diagram of the connection between the air blowing pipeline and the air exhaust and chip removal pipeline and the upper blowing neck block or the lower blowing neck block in this application, and the exhaust direction is shown in the figure.

[0032] Component number description

[0033] 10 Upper blow mold assembly

[0034] 101 Upward Blowing Template

[0035] 102 Upper blow mold kernel

[0036] 103 guide bushing

[0037] 104 Positioning column

[0038] 105 Upper tightening block

[0039] 20 Lower blow mold assembly

[0040] 21 Downward Blowing Template

[0041] 22 bottom blowing mold core

[0042] 23 guide pillars

[0043] 24 positioning holes

[0044] 25 Lower wedge block

[0045] 30 Blow molding cavity

[0046] 41 Upward Blowing Neck Block

[0047] 42 Downblowing Neck Block

[0048] 43 parison cavity

[0049] 44 Circulation gas path

[0050] 50 air blowing line

[0051] 51 Upper air blowing main pipe

[0052] 52 Upward blowing pipe

[0053] 53 Downward blowing main pipe

[0054] 54 Downward blowing pipe

[0055] 55 Upper air intake

[0056] 56 lower air intake

[0057] 60 Exhaust and chip removal pipeline

[0058] 61 Upper vent

[0059] 62 lower vent

[0060] 70 air blowing channel

[0061] 71 Blowhole

[0062] 72 Blowing Main Channel

[0063] 73 First blowing channel

[0064] 74 Second blowing channel

[0065] 80 Exhaust and chip removal channel

[0066] 81 Exhaust and chip removal holes

[0067] 82 The first exhaust and chip removal channel

[0068] 83 Second exhaust and chip removal channel

[0069] 84 Main road connecting section

[0070] 85 Exhaust and chip removal channels

[0071] 90 Eye Drop Bottles

[0072] 91 bottle

[0073] 92 Bottle thread

[0074] 110 Quick Connector

[0075] 120 mandrel assembly DETAILED DESCRIPTION

[0076] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0077] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification for the understanding and reading of those familiar with this technology, and are not used to limit the conditions for the implementation of this utility model. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in this utility model without affecting the efficacy and purpose of the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be considered as the scope of the implementation of this utility model without substantially changing the technical content.

[0078] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element through an intervening element.

[0079] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0080] The utility model provides a foreign matter removal structure for injection-blow molding of pharmaceutical packaging materials, and an injection-blow molding mold incorporating the foreign matter removal structure for injection-blow molding of pharmaceutical packaging materials. The injection-blow molding mold is used to produce pharmaceutical packaging materials. The following description uses an eye drop bottle as an example of the pharmaceutical packaging material, and the injection-blow molding mold is also an eye drop bottle mold. Furthermore, the primary material of the eye drop bottle is polyethylene or polypropylene, with a small amount of additives such as masterbatch and BHT antioxidant added.

[0081] Usually, such as Figure 3 and Figure 5 As shown, the eye drop bottle 90 includes a bottle body 91 and a threaded portion 92 integrally formed at one end of the bottle body 91. The outer peripheral surface of the threaded portion 92 is a threaded surface. The injection blow molding mold includes an injection mold and a blow mold. When producing the eye drop bottle 90, the threaded portion 92 of the bottle mouth of the eye drop bottle 90 is first injection molded. The threaded portion 92 is then removed from the injection mold and placed in a blow mold. The bottle body 91 of the eye drop bottle 90 is blow molded to obtain the eye drop bottle product. Finally, the eye drop bottle product is removed from the blow mold and demolded.

[0082] Furthermore, if Figures 1 to 5As shown, the blow mold includes an upper blow mold assembly 10 and a lower blow mold assembly 20 that can be opened and closed vertically, and a plurality of blow molding cavities 30 formed between the upper blow mold assembly 10 and the lower blow mold assembly 20. The plurality of blow molding cavities 30 are arranged side by side in the left-right direction, and each blow molding cavity 30 extends forward and backward along the axial direction of the eye drop bottle 90. In particular, the blow mold is equipped with a foreign matter removal structure for the pharmaceutical packaging material injection-blow product. In addition to the upper blow mold assembly 10 and the lower blow mold assembly 20, the foreign matter removal structure also includes an upper blow neck block 41, a lower blow neck block 42, a circulating air path 44, an air blowing pipeline 50, an exhaust and chip removal pipeline 60, an air blowing channel 70, and an exhaust and chip removal channel 80. Specifically, the upper blow mold assembly 10 is fixedly provided with an upper blow neck block 41 at the front end of each blow molding cavity 30, and the lower blow mold assembly 20 is fixedly provided with a lower blow neck block 42 at the front end of each blow molding cavity 30. A blank cavity 43 connected to the blow molding cavity 30 is formed between the upper blow neck block 41 and the lower blow neck block 42. The blank cavity 43 is used to accommodate the bottle mouth threaded portion 92 of the eye drop bottle 90, that is, the blank cavity 43 is used to accommodate the injection molded part of the medicine packaging material. The upper blow neck block 41 and the lower blow neck block 42 are both provided with a circulating air path 44 on the outer peripheral side of the blank cavity 43, and the circulating air path 44 is connected to the blank cavity 43. At least one of the upper blow mold assembly 10 and the lower blow mold assembly 20 is installed with a mutually independent blowing pipe 50 and an air outlet and chip removal pipe 60; at least one of the upper blow neck block 41 and the lower blow neck block 42 is provided with a mutually independent blowing channel 70 and an air outlet and chip removal channel 80; the blowing pipe 50, the blowing channel 70 and the circulating air path 44 are connected in sequence along the direction of blowing air into the circulating air path 44, and the circulating air path 44, the air outlet and chip removal channel 80 and the blowing pipe 50 are connected in sequence along the direction of exhausting air into the blowing pipe 50.

[0083] When the above blow mold is used to produce an eye drop bottle 90, the blow mold is initially in the open position with the upper blow mold assembly 10 and the lower blow mold assembly 20. The bottle neck threaded portion 92 removed from the injection mold is placed into the parison cavity 43 of the blow mold. Thereafter, the upper blow mold assembly 10 and the lower blow mold assembly 20 are closed, and the blow mold completes the blow molding of the bottle body in the blow molding cavity 30. After the bottle body is blow molded, the bottle body is integrally formed at the rear end of the bottle neck threaded portion 92. Then, gas is introduced into the blow pipe 50, as shown in FIG. Figure 9 As shown, the gas enters the circulating air path 44 on the surface of each preform cavity 43 through the blowing channel 70, and an air flow is formed in the circulating air path 44. Under the action of the air flow, foreign matter such as white powder on the surface of the preform cavity 43 is blown into the air outlet and chip removal channel 80, as shown in FIG. Figure 10 As shown, the white powder crystal particles at the upper blowing neck block 41 , the lower blowing neck block 42 and the bottle mouth thread portion 92 are discharged through the air outlet and chip removal channel 80 .

[0084] Therefore, the present application configures an air blowing line 50, an air outlet and chip removal line 60, an air blowing channel 70, and an air outlet and chip removal channel 80 in the blow mold, and then uses the air blowing line 50 and the air blowing channel 70 to blow air into the circulating air path 44 to form an air flow, thereby driving foreign matter such as white powder on the surface of the preform cavity 43 into the air outlet and chip removal channel 80 and then being discharged through the air outlet and chip removal line 60. Compared with the manual cleaning of the mold surface and the selection of pharmaceutical packaging products in the prior art, the present application realizes the automatic removal and discharge of foreign matter in the preform cavity 43, which saves time and effort and is highly efficient. In particular, it can reliably prevent foreign matter such as white powder from adhering to the pharmaceutical packaging products or even mixing into the pharmaceutical packaging products, effectively ensuring that each pharmaceutical packaging product is clean, and ultimately significantly improving product quality and production efficiency.

[0085] Furthermore, if Figure 7 As shown, the upper blow neck block 41 and the lower blow neck block 42 are each provided with a clearance zone on the wall of the preform cavity 43. The clearance zone is a recessed area on the wall of the preform cavity 43, or in other words, a gap is formed on the wall of the preform cavity 43 by performing a clearance treatment on the wall of the preform cavity 43 to form a glue position clearance surface. The clearance zone constitutes a circulating air path 44. The circulating air path 44 is a circulating gap distributed between the upper blow neck block 41 and the threaded portion 92 of the bottle mouth of the eye drop bottle 90, and between the lower blow neck block 42 and the threaded portion 92 of the bottle mouth of the eye drop bottle 90 during blow molding. The end of the blowing channel 70 is a blowing hole 71 provided on the wall of the preform cavity 43, and the end of the air outlet and chip removal channel 80 is an air outlet and chip removal hole 81 provided on the wall of the preform cavity 43. The blowing hole 71 and the air outlet and chip removal hole 81 are staggered along the circumference of the preform cavity 43.

[0086] Furthermore, in this embodiment, the upper blow mold assembly 10 can move up and down as a whole, and the lower blow mold assembly 20 is fixed, and the opening and closing of the blow mold are realized accordingly by the up and down movement of the upper blow mold assembly 10. Figures 1 to 4 As shown, the preferred structure of the upper blow mold assembly 10 is as follows: the upper blow mold assembly 10 includes an upper blow mold plate 101 that can reciprocate up and down, an upper blow mold core 102 fixed to the bottom of the upper blow mold plate 101, and a guide sleeve 103 fixed in the upper blow mold plate 101. The upper blow neck block 41 is fixed to the bottom of the upper blow mold core 102. Figures 1 to 3 ,as well as Figure 5 As shown, the preferred structure of the lower blow mold assembly 20 is: the lower blow mold assembly 20 includes a fixed lower blow template 21, a lower blow mold core 22 fixed to the top of the lower blow template 21, and a guide column 23 fixed to the lower blow template 21, and the lower blow neck block 42 is fixed to the top of the lower blow mold core 22; the guide column 23 is passed through the guide sleeve 103, and the two are slidably matched, and the blow molding cavity 30 is formed between the upper blow mold core 102 and the lower blow mold core 22.

[0087] Preferably, if Figures 4 to 6As shown, the upper blow mold assembly 10 also includes a positioning post 104 fixed to the bottom surface of the upper blow mold core 102, and the lower blow mold assembly 20 also includes a positioning hole 24 defined in the top surface of the lower blow mold core 22. The positioning post 104 and the positioning hole 24 correspond one to another. When the upper blow mold assembly 10 moves downward, the positioning post 104 is inserted into the positioning hole 24 to achieve precise positioning, ensuring that the upper blow mold assembly 10 and the lower blow mold assembly 20 are more securely closed. In addition, the upper blow mold assembly 10 also includes an upper locking block 105 fixed to the upper blow mold core 102. The upper locking block 105 abuts the outer side of the upper blow neck block 41 at the outermost side in the left-right direction. Similarly, the lower blow mold assembly 20 also includes a lower locking block 25 fixed to the lower blow mold core 22. The lower locking block 25 abuts the outer side of the lower blow neck block 42 at the outermost side in the left-right direction.

[0088] Furthermore, both the upper blow neck block 41 and the lower blow neck block 42 are provided with air blowing channels 70, which are arranged approximately vertically symmetrically with the air blowing channels 70 in the upper blow neck block 41 and the lower blow neck block 42. Both the upper blow neck block 41 and the lower blow neck block 42 are provided with air outlet and chip removal channels 80, which are arranged approximately vertically symmetrically with the air outlet and chip removal channels 80 in the upper blow neck block 41 and the lower blow neck block 42. Air blowing pipes 50 are installed in both the upper blow mold assembly 10 and the lower blow mold assembly 20, which are also arranged approximately vertically symmetrically with the air blowing pipes 50 in the upper blow mold assembly 10 and the lower blow mold assembly 20. Both the upper blow mold assembly 10 and the lower blow mold assembly 20 are equipped with exhaust and chip removal ducts 60. The exhaust and chip removal ducts 60 in the upper blow mold assembly 10 and the exhaust and chip removal ducts 60 in the lower blow mold assembly 20 are also arranged approximately symmetrically in vertical direction. The preferred structures of the air blowing channels 70 and exhaust and chip removal channels 80 in the upper blow neck blocks 41 and the lower blow neck blocks 42, as well as the air blowing ducts 50 and exhaust and chip removal ducts 60 in the upper blow mold assembly 10 and the lower blow mold assembly 20 are described below.

[0089] The air blowing passages 70 in the upper blowing neck block 41 and the lower blowing neck block 42 are special-shaped air passages: Figure 8 As shown, the blowing channel 70 includes a main blowing channel 72 extending vertically, first blowing channels 73 symmetrically connected to the left and right sides of the main blowing channel 72, and a plurality of second blowing channels 74 spaced apart along the axial direction of the preform cavity 43. The inlet end of the main blowing channel 72 is connected to the blowing pipeline 50. The end of the first blowing channel 73, away from the main blowing channel 72, extends straight along the axial direction of the preform cavity 43 and is connected to the plurality of second blowing channels 74. The end of the second blowing channel 74, away from the first blowing channel 73, extends straight along the radial direction of the preform cavity 43 and extends to the circulating air path 44. The end of the second blowing channel 74, away from the first blowing channel 73, constitutes the blowing hole 71. Preferably, the inner diameters of the main blowing channel 72, the first blowing channel 73, and the second blowing channel 74 decrease in sequence.

[0090] The gas outlet and chip removal channels 80 in the upper blowing neck block 41 and the lower blowing neck block 42 are special-shaped gas channels: Figure 8 As shown, there are two groups of air outlet and chip removal channels 80, which are arranged symmetrically on the left and right; each group of air outlet and chip removal channels 80 includes a first air outlet and chip removal main channel 82 extending up and down, a second air outlet and chip removal main channel 83 extending straight forward and backward along the axial direction of the blank cavity 43, a main channel connecting section 84 connected between the first air outlet and chip removal main channel 82 and the second air outlet and chip removal main channel 83, and several air outlet and chip removal branch channels 85 distributed at intervals forward and backward along the axial direction of the blank cavity 43. One end of the several air outlet and chip removal branch channels 85 extends to the circulating air path 44, and the other end is connected to the second air outlet and chip removal main channel 83. The end of the air outlet and chip removal branch channel 85 away from the second air outlet and chip removal main channel 83 is the air outlet and chip removal hole 81, and the outlet end of the first air outlet and chip removal main channel 82 is connected to the air outlet and chip removal pipeline 60. Preferably, the inner diameter of the first gas outlet and chip removal channel 82 and the inner diameter of the second gas outlet and chip removal channel 83 are both much larger than the inner diameter of the gas outlet and chip removal channel 85 .

[0091] like Figure 9 As shown, the air blowing pipeline 50 in the upper blow mold assembly 10 includes an upper air blowing main pipe 51 extending straight left and right along the parallel direction of the plurality of blow molding cavities 30, and an upper air blowing branch pipe 52 corresponding to each upper blow neck block 41. The upper air blowing branch pipe 52 extends vertically, and the upper and lower ends of the upper air blowing branch pipe 52 are respectively connected to the upper air blowing main pipe 51 and the air blowing main channel 72 in the upper blow neck block 41. The upper air blowing main pipe 51 is installed in the upper blow mold plate 101. The left and right walls of the upper blow mold plate 101 are respectively provided with upper air inlet holes 55 at the left and right ends of the upper air blowing main pipe 51. Quick connectors 110 are provided at the upper air inlet holes 55 and connected to the left and right ends of the upper air blowing main pipe 51 for connecting the machine blow pipe to the upper blow mold assembly 10. The upper air blowing branch pipe 52 is installed in the upper blow mold core 102.

[0092] like Figure 9 As shown, the air blowing pipeline 50 in the lower blow mold assembly 20 includes a lower blow main pipe 53 extending straight left and right along the parallel direction of the plurality of blow molding cavities 30, and a lower blow branch pipe 54 corresponding to each lower blow neck block 42. The lower blow branch pipe 54 extends vertically, and the lower and upper ends of the lower blow branch pipe 54 are respectively connected to the lower blow main pipe 53 and the air blowing main channel 72 in the lower blow neck block 42. The lower blow main pipe 53 is installed in the lower blow mold plate 21. The left and right walls of the lower blow mold plate 21 are respectively provided with lower air inlet holes 56 at the left and right ends of the lower blow main pipe 53. Quick connectors 110 are provided at the lower air inlet holes 56 and connected to the left and right ends of the lower blow main pipe 53 for connecting the machine blow pipe to the lower blow mold assembly 20. The lower blow branch pipe 54 is installed in the lower blow mold core 22.

[0093] like Figure 10As shown, there are multiple gas outlet and chip removal pipes 60 in the upper blow mold assembly 10, and the multiple gas outlet and chip removal pipes 60 correspond one to one with the upper blow neck block 41 and are connected to the first gas outlet and chip removal main channel 82 in the upper blow neck block 41. The gas outlet and chip removal pipes 60 in the upper blow mold assembly 10 are arranged in the upper blow mold core 102 and the upper blow mold plate 101. The front side wall of the upper blow mold plate 101 is provided with an upper gas outlet hole 61 at the end of each gas outlet and chip removal pipe 60, as shown in FIG. Figure 1 shown.

[0094] like Figure 10 As shown, there are multiple gas outlet and chip removal pipes 60 in the lower blow mold assembly 20, and the multiple gas outlet and chip removal pipes 60 correspond one to one with the lower blow neck block 42 and are connected to the first gas outlet and chip removal main channel 82 in the lower blow neck block 42. The gas outlet and chip removal pipes 60 in the lower blow mold assembly 20 are arranged in the lower blow mold core 22 and the lower blow template 21. The front side wall of the lower blow template 21 is provided with a lower gas outlet hole 62 at the end of each gas outlet and chip removal pipe 60, as shown in FIG. Figure 1 shown.

[0095] Furthermore, the foreign matter removal structure for the injection-blow molded pharmaceutical packaging material also includes a filter device. Each exhaust and chip removal pipeline 60 is connected to the filter device via a quick connector 110 at one end, away from the first exhaust and chip removal channel 82. This allows the white powder crystals from the upper and lower blow necks 41, 42, and the threaded portion 92 of the bottle neck to be discharged through the exhaust and chip removal channels 80, filtered by the filter device, and then discharged and allowed to stand.

[0096] Furthermore, the air blowing channel 70 and the air exhaust and chip removal channel 80 in the upper blowing neck block 41 and the lower blowing neck block 42 are both special-shaped air paths, so the upper blowing neck block 41 and the lower blowing neck block 42 are preferably 3D printed parts, and are particularly preferably 3D printed metal inserts, which facilitates the processing and manufacturing of the upper blowing neck block 41 and the lower blowing neck block 42.

[0097] Furthermore, the injection-blow molding mold also includes a turntable that is roughly triangular in shape, three workstations located on each outer edge of the turntable, a demolding assembly, and a drive assembly; the three workstations are respectively the injection molding station, the blow molding station, and the demolding station, the injection molding is arranged at the injection molding station, the blow molding is arranged at the blow molding station, and the demolding station is arranged at the demolding station. The turntable is fixed with a plurality of core rod assemblies 120 at each outer edge; for ease of description, the three outer edges of the turntable are defined as the first outer edge, the second outer edge, and the third outer edge, respectively; the plurality of core rod assemblies 120 fixed at the first outer edge are defined as the first core rod assembly, the plurality of core rod assemblies 120 fixed at the second outer edge are defined as the second core rod assembly, and the plurality of core rod assemblies 120 fixed at the third outer edge are defined as the third core rod assembly. The drive assembly is in transmission connection with the turntable to drive the turntable to rotate and move up and down.

[0098] When the injection blow molding mold is in operation, the first core rod assembly, the second core rod assembly and the third core rod assembly are respectively located at the injection molding station, the blow molding station and the demolding station. The first core rod assembly is placed in the injection molding cavity of the injection mold to complete the injection molding of the bottle mouth thread part 92, the second core rod assembly is placed in the blow molding cavity 30 of the blow mold to complete the blow molding of the bottle body, and the eye drop bottle product on the third core rod assembly is demolded by the demolding assembly at the demolding station, driving the eye drop bottle product to be removed from the third core rod assembly. After one operation is completed, the injection mold and the blow mold are both opened. The drive assembly first drives the turntable upward, driving the first core rod assembly, the second core rod assembly, and the third core rod assembly to move upward. The first core rod assembly is then removed from the injection molding cavity of the injection mold, and the second core rod assembly is removed from the blow molding cavity 30 of the blow mold. Afterwards, the drive assembly drives the turntable to rotate an angle, driving the first core rod assembly, the second core rod assembly, and the third core rod assembly to rotate an angle. The first core rod assembly is then transferred from the injection molding station to the blow molding station, the second core rod assembly is transferred from the blow molding station to the demolding station, and the third core rod assembly is transferred from the demolding station to the injection molding station. Finally, the drive assembly drives the turntable downward, driving the first core rod assembly, the second core rod assembly, and the third core rod assembly to move downward. The first core rod assembly is then placed in the blow molding cavity 30 of the blow mold, and the third core rod assembly is placed in the injection molding cavity of the injection mold. With both the injection and blow molds closed, the third core rod assembly is placed in the injection molding cavity of the injection mold to complete the injection molding of the bottle thread portion 92. The first core rod assembly is placed in the blow molding cavity 30 of the blow mold to complete the blow molding of the bottle body. The eye drop bottle product on the second core rod assembly is demolded by the demolding assembly at the demolding station. This cycle significantly improves the efficiency of the injection blow molding of the eye drop bottle 90.

[0099] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0100] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A foreign body removal structure on a drug packaging material injection-blow product, comprising a blow mold for blow-molding the drug packaging material, the blow mold comprising an upper blow mold assembly (10) and a lower blow mold assembly (20) that can be opened and closed, and a plurality of blow molding cavities (30) formed between the upper blow mold assembly (10) and the lower blow mold assembly (20), characterized in that: The upper blow mold assembly (10) is fixedly provided with an upper blow neck block (41) at the end of each blow molding cavity (30), and the lower blow mold assembly (20) is fixedly provided with a lower blow neck block (42) at the end of each blow molding cavity (30). A parison cavity (43) for accommodating an injection-molded portion of the medicine packaging material and communicating with the blow molding cavity (30) is formed between the upper blow neck block (41) and the lower blow neck block (42). A circulating air path (44) is provided on the outer peripheral side of the parison cavity (43). At least one of the upper blow mold assembly (10) and the lower blow mold assembly (20) is equipped with a mutually independent air blowing pipeline (50) and an air outlet and chip removal pipeline (60); at least one of the upper blow neck block (41) and the lower blow neck block (42) is provided with a mutually independent air blowing channel (70) and an air outlet and chip removal channel (80); the air blowing pipeline (50), the air blowing channel (70) and the circulating air path (44) are sequentially connected, and the circulating air path (44), the air outlet and chip removal channel (80) and the air blowing pipeline (50) are sequentially connected.

2. The foreign matter removal structure on the injection-blow product of the medicine packaging material according to claim 1 is characterized in that: The upper blowing neck block (41) and the lower blowing neck block (42) are both provided with a clearance zone on the cavity wall of the preform cavity (43), and the clearance zone constitutes a circulating air path (44). The end of the blowing channel (70) is a blowing hole (71) provided on the cavity wall of the preform cavity (43), and the end of the air outlet and chip removal channel (80) is an air outlet and chip removal hole (81) provided on the cavity wall of the preform cavity (43). The blowing hole (71) and the air outlet and chip removal hole (81) are staggered along the circumference of the preform cavity (43).

3. The foreign matter removal structure on the injection-blow product of the pharmaceutical packaging material according to claim 1 is characterized in that: The upper blowing neck block (41) and the lower blowing neck block (42) are both provided with a blowing channel (70); the blowing channel (70) includes a blowing main channel (72) extending up and down, a first blowing branch channel (73) symmetrically connected on both sides of the blowing main channel (72), and a plurality of second blowing branches (74) distributed at intervals along the axial direction of the preform cavity (43); the inlet end of the blowing main channel (72) is connected to the blowing pipeline (50); the first blowing branch channel (73) extends straight along the axial direction of the preform cavity (43) away from the end of the blowing main channel (72) and is connected to the plurality of second blowing branches (74); the second blowing branches (74) extend straight along the radial direction of the preform cavity (43) away from the end of the first blowing branch channel (73) and both extend to the circulating air path (44).

4. The foreign matter removal structure on the injection-blow product of the medicine packaging material according to claim 3 is characterized in that: The upper blow mold assembly (10) and the lower blow mold assembly (20) are both equipped with a blowing pipeline (50); The blowing pipeline (50) in the upper blow mold assembly (10) comprises an upper blowing main pipe (51) extending straight along the parallel direction of the plurality of blow molding cavities (30), and upper blowing branch pipes (52) corresponding one-to-one to each upper blowing neck block (41), the upper blowing branch pipes (52) extending up and down, and the upper end and lower end of the upper blowing branch pipe (52) being connected to the upper blowing main pipe (51) and the blowing main channel (72) in the upper blowing neck block (41) respectively; The blowing pipeline (50) in the lower blowing mold assembly (20) includes a lower blowing main pipe (53) extending straight along the side-by-side direction of the plurality of blow molding cavities (30), and a lower blowing branch pipe (54) corresponding to each lower blowing neck block (42). The lower blowing branch pipe (54) extends up and down, and the lower end and upper end of the lower blowing branch pipe (54) are respectively connected to the lower blowing main pipe (53) and the blowing main channel (72) in the lower blowing neck block (42).

5. The foreign matter removal structure on the injection-blow product of the medicine packaging material according to claim 1 is characterized in that: Both the upper blowing neck block (41) and the lower blowing neck block (42) are provided with an air outlet and chip removal channel (80); the air outlet and chip removal channels (80) are in two groups and are symmetrically arranged; each group of the air outlet and chip removal channels (80) comprises a first air outlet and chip removal main channel (82) extending up and down, a second air outlet and chip removal main channel (83) extending straight along the axial direction of the blank cavity (43), a main channel connecting section (84) connecting the first air outlet and chip removal main channel (82) and the second air outlet and chip removal main channel (83), and a plurality of air outlet and chip removal branch channels (85) spaced apart along the axial direction of the blank cavity (43); one end of each of the air outlet and chip removal branch channels (85) extends to the circulating air path (44), and the other end is connected to the second air outlet and chip removal main channel (83); the outlet end of the first air outlet and chip removal main channel (82) is connected to the air outlet and chip removal pipeline (60).

6. The foreign matter removal structure on the injection-blow product of the medicine packaging material according to claim 5, characterized in that: The upper blow mold assembly (10) and the lower blow mold assembly (20) are both equipped with air outlet and chip removal pipelines (60); There are multiple air outlet and chip removal pipelines (60) in the upper blowing mold assembly (10), which correspond one to one with the upper blowing neck block (41) and are connected to the first air outlet and chip removal main channel (82) in the upper blowing neck block (41); There are multiple air outlet and chip removal pipelines (60) in the lower blowing mold assembly (20), which correspond one to one with the lower blowing neck block (42) and are connected to the first air outlet and chip removal main channel (82) in the lower blowing neck block (42).

7. The foreign matter removal structure on the injection-blow product of the medicine packaging material according to claim 1 or 6, characterized in that: It also includes a filtering device, and one end of each of the air outlet and chip removal pipelines (60) away from the first air outlet and chip removal main channel (82) is connected to the filtering device via a quick connector (110).

8. The foreign matter removal structure on the injection-blow product of the medicine packaging material according to claim 1 is characterized in that: The upper blow mold assembly (10) comprises an upper blow mold plate (101) that can reciprocate up and down, an upper blow mold core (102) fixed at the bottom of the upper blow mold plate (101), and a guide sleeve (103) fixed in the upper blow mold plate (101), and the upper blow neck block (41) is fixed at the bottom of the upper blow mold core (102); the lower blow mold assembly (20) comprises a fixed lower blow mold plate (21), a lower blow mold core (22) fixed at the top of the lower blow mold plate (21), and a guide column (23) fixed to the lower blow mold plate (21), and the lower blow neck block (42) is fixed at the top of the lower blow mold core (22); the guide column (23) is inserted into the guide sleeve (103), and the two are slidably matched, and the blow molding cavity (30) is formed between the upper blow mold core (102) and the lower blow mold core (22).

9. The foreign matter removal structure on the injection-blow product of the medicine packaging material according to claim 1, 3 or 5, characterized in that: The upper blowing neck block (41) and the lower blowing neck block (42) are both 3D printed parts.

10. An injection blow molding mold, comprising an injection mold for injection molding a threaded portion (92) of a bottle mouth of a medicine packaging material, and a blow mold for blow molding a bottle body (91) of the medicine packaging material, characterized in that: The blow mold is provided with a foreign matter removal structure on a medicine packaging material injection-blown product according to any one of claims 1 to 9.

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