An injection molding mold for an infusion set medication injection part

Abstract

An injection molding mold for an infusion set medicated injection part comprises an upper fixed plate, a mother template, a male template, two mold feet and a lower fixed plate, an upper ejector plate and a lower ejector plate are stacked between the two mold feet; a first injection molding component is provided at the bottom of the mother template, a second injection molding component is provided on the male template, a third injection molding component is provided on the lower fixed plate, and a product cavity is formed between the first injection molding component, the second injection molding component and the third injection molding component; a flow channel is formed between the mother template and the male template, a glue injection bushing extending downward and connected to the flow channel is provided in the upper fixed plate, a flow channel ejector pin is fixed on the upper ejector plate, and the end of the flow channel is connected to the product cavity. The infusion set medicated injection part molded by the technical solution of the present invention will not have residual bubbles during use, which is convenient for clinical operation and ensures the safety of patient infusion. At the same time, the flow channel is automatically separated from the product during the production process, and the product appearance is smooth and beautiful. The mold can be automatically produced, with small size, high efficiency and long service life.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to an injection molding die for a drug-adding injection piece of an infusion set. Background Art

[0002] Infusion sets are mainly used for intravenous infusion therapy of patients in clinical practice. When liquid medicine needs to be added during the infusion process, most traditional infusion sets are equipped with a dosing port above the Mofey drip bucket. Since the national standard GB8368-2018 will be implemented in 2021, the standard requires that the Mofey drip bucket cannot be used for dosing, so the dosing port of most infusion sets on the market can only be set on the Y-shaped dosing injection piece at the end of the infusion set. The Y-shaped dosing injection piece has disadvantages during the use of the infusion set, especially before the infusion, the bubbles cannot be completely discharged during the exhaust process of the infusion set. Summary of the invention

[0003] Based on this, the object of the present invention is to provide an injection molding mold for an infusion set medicated injection piece, so as to avoid residual bubbles in the molded infusion set medicated injection piece during use.

[0004] An injection molding mold for an infusion set dosing injection piece, comprising an upper fixed plate, a female mold plate, a male mold plate, two mold feet and a lower fixed plate arranged in sequence from top to bottom, an upper ejector plate and a lower ejector plate stacked between the two mold feet, the upper ejector plate and the lower ejector plate being fixed as a whole and being movable up and down between the lower fixed plate and the male mold plate;

[0005] The bottom of the female mold plate is provided with a first injection molding component arranged downward, the male mold plate is provided with a second injection molding component arranged obliquely upward, and the lower fixed plate is provided with a third injection molding component arranged upward, the end of the third injection molding component is tightly attached to the end of the second injection molding component, and the end of the first injection molding component is tightly attached to the middle of the second injection molding component, so that a product cavity is formed between the first injection molding component, the second injection molding component and the third injection molding component;

[0006] A flow channel is formed between the female template and the male template, a glue injection bushing extending downward and communicating with the flow channel is provided in the upper fixed plate, a flow channel ejector pin extending to the bottom of the flow channel is fixed on the upper ejector plate, and an end of the flow channel is communicated with the product cavity;

[0007] A return pin is fixed on the upper ejection plate and penetrates the male template upwards. An angle pin is arranged obliquely in the female template. The angle pin penetrates the male template, the upper ejection plate and the lower ejection plate downwards in sequence.

[0008] Compared with the prior art, the infusion set medicated injection parts molded by the technical solution of the present invention will not have residual bubbles during use, which is convenient for clinical operation and ensures the safety of patient infusion. At the same time, the flow channel and the product are automatically separated during the production process, the product appearance is smooth and beautiful, and the mold can be automatically produced, with a small size, high efficiency and a long service life.

[0009] Furthermore, the first injection molding component includes a mother mold core embedded in the bottom of the mother mold plate, and a mother mold core insert arranged in the mother mold core and facing downward, and the end of the mother mold core insert is tightly attached to the middle of the second injection molding component.

[0010] Further, the second injection molding assembly includes a male mold core arranged on the top of the male mold plate, a male mold core insert arranged in the male mold core, two slider seats arranged on both sides of the male mold core insert, a slider insert inclinedly arranged on the slider seat, and two pressing blocks arranged on both sides of the slider seat;

[0011] The top of the slider seat is fixed to the bottom of the female mold plate through a bundle block, and the top of the slider insert respectively abuts against the side walls of the male mold insert and the bottom of the female mold core. The slider insert is provided with a slider insert pin protruding from the top, and the end of the female mold core insert is tightly attached to the middle of the slider insert pin.

[0012] Furthermore, the third injection molding component includes a sleeve disposed on the upper ejector plate and extending into the male mold insert, and a sleeve ejector pin disposed in the sleeve, the bottom of the sleeve ejector pin is fixed in the lower fixed plate, and the end of the sleeve ejector pin is tightly attached to the end of the slider insert pin, so that a product cavity is formed between the female mold insert, the slider insert pin and the sleeve ejector pin.

[0013] Furthermore, the angle between the axis of the angle pin and the axis of the glue injection bushing is 8° to 25°.

[0014] Furthermore, the end of the flow channel is connected obliquely downward to the side wall of the third injection molding component, and the cross-sectional area of ​​the connection is 0.1mm 2 ~1mm 2 .

[0015] Further, the included angle between the movement direction of the slider insert and the movement direction of the slider seat is 90±20°;

[0016] The female mold core, the male mold core, the male mold core insert and the slide block insert are all provided with circulating cooling water channels.

[0017] Furthermore, a cushion block is provided on the end surface of the male mold plate, an oil cylinder is provided on the cushion block, and an end of a piston rod of the oil cylinder passes through the cushion block and is connected to the slider seat.

[0018] Furthermore, a male mold support plate is provided between the male mold plate and the upper ejection plate, the bundle block is fixed in the through hole of the male mold support plate, and an angle pin arranged obliquely upward is provided in the oblique hole of the male mold support plate;

[0019] An opener and a shutter are provided at the bottom of the female template, and the bottom of the opener and a shutter extends into the male template;

[0020] A limiting pull rod is provided on the top of the male mold plate, and the end of the limiting pull rod passes through the male mold plate and is fixed on the male mold supporting plate.

[0021] Furthermore, the end of the angle pin is obliquely upward and passes through the bundle block and the male mold plate in sequence, and the angle between the axis and the axis of the injection bushing is 8° to 25°. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an injection molding die for a medication injection piece for an infusion set according to a first embodiment of the present invention;

[0023] Figure 2 for Figure 1 An exploded view of the injection molding mold for the infusion set dosing injection part;

[0024] Figure 3 for Figure 1 A cross-sectional view of an injection molding mold for an infusion set medication injection part;

[0025] Figure 4 It is a schematic structural diagram of the injection molding injection piece of the infusion set of the present invention;

[0026] Figure 5 It is a structural schematic diagram of an injection molding die for a medication injection piece for an infusion set according to a second embodiment of the present invention;

[0027] Figure 6 for Figure 5 A cross-sectional view of a driving portion of a second injection molding assembly;

[0028] Figure 7 It is a cross-sectional view of the driving part of the second injection molding component in the third embodiment of the present invention.

[0029] Description of main component symbols:

[0030] 1-upper fixed plate; 2-female mold plate; 3-male mold plate; 4-mold foot; 5-upper ejector plate; 6-lower ejector plate; 7-lower fixed plate; 8-female mold core; 9-male mold core; 10-male mold core insert; 11-female mold core insert; 12-slider insert pin; 13-sleeve ejector pin; 14-product cavity; 15, 15a-slider insert; 16-slider seat; 17, 17a-bundle block; 18, 18a-angle pin; 19-pressing block; 20-sleeve; 21-flow channel ejector pin; 22-flow channel; 23-KO hole; 24-return pin; 25-waterway; 26-pad; 27-oil cylinder; 28-male mold support plate; 29-opener and closer; 30-limiting pull rod; 31-glue injection bushing.

[0031] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] Example 1

[0036] See also Figures 1 to 4 An injection molding mold for a drug-dosing injection piece of an infusion set provided in one embodiment of the present invention comprises an upper fixing plate 1, a female mold plate 2, a male mold plate 3, two mold feet 4 and a lower fixing plate 7 which are arranged in sequence from top to bottom, an upper ejector plate 5 and a lower ejector plate 6 are stacked between the two mold feet 4, and the upper ejector plate 5 and the lower ejector plate 6 are fixed as a whole and can move up and down between the lower fixing plate 7 and the male mold plate 3;

[0037] The bottom of the female mold plate 2 is provided with a first injection molding component arranged downward, the male mold plate 3 is provided with a second injection molding component arranged obliquely upward, and the lower fixed plate 6 is provided with a third injection molding component arranged upward, the end of the third injection molding component is tightly attached to the end of the second injection molding component, and the end of the first injection molding component is tightly attached to the middle of the second injection molding component, so that a product cavity 14 is formed between the first injection molding component, the second injection molding component and the third injection molding component;

[0038] A flow channel 22 is formed between the female template 2 and the male template 3, a glue injection bushing 31 extending downward and communicating with the flow channel 22 is provided in the upper fixed plate 1, a flow channel ejector pin 21 extending to the bottom of the flow channel 22 is fixed on the upper ejector plate 5, and an end of the flow channel 22 is communicated with the product chamber 14;

[0039] A return pin 24 is fixed on the upper ejector plate 5 and penetrates the male template 3 upward. An angle pin 18 is arranged obliquely in the female template 2. The angle pin 18 penetrates the male template 3, the upper ejector plate 5 and the lower ejector plate 6 downward in sequence.

[0040] It should be noted that, in the present invention, the first injection molding component corresponds to the liquid outlet channel of the injection molding product, the second injection molding component corresponds to the drug addition channel of the injection molding product, and the third injection molding component corresponds to the liquid inlet channel of the injection molding product. Specifically, the upper ejector plate 5 and the lower ejector plate 6 are tightly fitted by screws, and can move up and down along the return pin 24. The upper fixed plate 1 is fixed to the mother template 2 by screws, and the angle pin 18 is fixed in the inclined hole of the mother template 2.

[0041] See also Figure 2 and Figure 3 The first injection molding component includes a mother mold core 8 embedded in the bottom of the mother mold plate 2, and a mother mold core inlet 11 arranged in the mother mold core 8 and facing downward. A liquid outlet channel is formed during the injection molding process through the mother mold core inlet 11. The end of the mother mold core inlet 11 is tightly attached to the middle of the second injection molding component to connect the dosing channel and the liquid outlet channel.

[0042] See also Figure 2 and Figure 3 The second injection molding assembly includes a male mold core 9 disposed on the top of the male mold plate 3, a male mold core insert 10 disposed in the male mold core 9, two slider seats 16 disposed on both sides of the male mold core insert 10, a slider insert 15 obliquely disposed on the slider seat 16, and two pressing blocks 19 disposed on both sides of the slider seat 16;

[0043] The top of the slider seat 16 is fixed to the bottom of the female mold plate 2 by a bundle block 17, and the top of the slider insert 15 respectively abuts against the side wall of the male mold insert 10 and the bottom of the female mold 8. The slider insert 15 is provided with a slider pin 12 set on the protruding top, and a dosing channel is formed during the injection molding process through the slider pin 12. The end of the female mold inlet 11 is tightly attached to the middle of the slider pin 12 to connect the liquid outlet channel and the dosing channel.

[0044] It should be noted that, in the present invention, the bundle block 17 is provided with an inclined surface on the side away from the female template, and the inclined surface and the angle pin 18 form an angle of 0.5° to 5°. When the mold is closed, the inclined surface just fits tightly with the corresponding inclined surface on the slider seat 16. The connecting end of the slider insert 15 and the slider seat 16 is provided with a T-slot, and the T-slot is slidably connected with the T-slot on the slider seat 16. In addition, a plurality of the pressing blocks 19 are fixed in the groove of the male template 3 by screws, and the pressing blocks 19 restrict the slider seat 16 in the groove of the male template 3, and can only slide along the pressing blocks 19.

[0045] Furthermore, the third injection molding component includes a sleeve 20 arranged on the upper ejector plate 5 and extending into the male mold insert 10, and a sleeve ejector pin 13 arranged in the sleeve 20, the bottom of the sleeve ejector pin 13 is fixed in the lower fixed plate 7, and a liquid inlet channel is formed during the injection molding process through the sleeve ejector pin 13, and the end of the sleeve ejector pin 13 is tightly attached to the end of the slider insert pin 12, so that a product cavity is formed between the female mold insert 11, the slider insert pin 12 and the sleeve ejector pin 13.

[0046] In a preferred embodiment of the present invention, the angle between the axis of the angle pin 18 and the axis of the injection bushing 31 is 8° to 25°. Specifically, when the angle pin 18 moves the slider seat 16, the maximum distance that the slider seat 16 can move laterally, that is, the smaller the angle of the angle pin 18, the shorter the distance that the slider seat 16 can move, and the shorter the length of the angle pin 18, the shorter the movement distance. The shorter the movement distance of the slider seat 16, the shorter the distance that the slider pin 12 moves, but the movement distance of the slider pin 12 is at least required to completely pull the slider pin 12 out of the product. When the angle of the angle pin 18 is large, the force applied to the angle pin 18 when moving the slider seat 16 is large, and it is easy to be pulled out. The angle pin 18 is also easy to break if it is long, so the angle and length are the most optimized design under the condition that the slider pin 12 is completely pulled out of the product.

[0047] In another preferred embodiment of the present invention, the end of the flow channel 22 is connected to the side wall of the third injection molding component obliquely downward, and the cross-sectional area of ​​the connection is 0.1mm 2 ~1mm 2Specifically, the glue inlet connecting the flow channel 22 to the product is an automatic glue-breaking type, and the cross-sectional area of ​​the automatic glue-breaking part is required to be small. If it is too large, it cannot be disconnected, or after disconnection, it will leave a large mark on the product, or even take off a piece of plastic from the product. If it is too small, it will cause the product to not be fully filled during injection molding. The glue inlet type used in this mold is a submersible glue inlet, and the optimal cross-sectional area is 0.4mm 2 ~0.8mm 2 .

[0048] In a preferred embodiment of the present invention, the angle between the movement direction of the slider insert 15 and the movement direction of the slider seat 16 is 90±20°. Specifically, similar to the angle pin 18, the angle between the slider insert 15 and the slider seat 16 affects the stroke and the strength of the parts.

[0049] In another preferred embodiment of the present invention, the female mold core 8, the male mold core 9, the male mold core insert 10 and the slider insert 15 are all provided with circulating cooling water circuits to achieve a temperature reduction function during the injection molding process.

[0050] It should be noted that, in this embodiment, the injection molding step of the molding mold includes:

[0051] First, fix the upper fixing plate 1 on the fixed platen of the injection molding machine, fix the lower fixing plate 7 on the movable platen of the injection molding machine, and place the injection molding machine nozzle close to the injection bushing 31 to inject the high-temperature molten plastic raw material into the injection bushing 31;

[0052] Second, the raw material flows into the product cavity 14 through the flow channel 22, fills the flow channel 22 and the product cavity 14, and solidifies under the temperature of the mold itself and the cooling of the water channel;

[0053] Third, the injection mold starts to move, the female mold plate 2 is separated from the male mold plate 3, driving the female mold core 8 to separate from the male mold core 9, the female mold core insert 11 is pulled out of the product, and the part of the flow channel 22 in the injection bushing 31 is removed from the injection bushing 31 and remains on the male mold core insert 10;

[0054] Fourth, the bundle block 17 fixed on the mother template 2 is separated from the slider seat 16, and the angle pin 18 hooks the slider seat 16 to slide along the pressing block 19;

[0055] Fifth, the slider seat 16 pulls the slider insert 15 and the slider insert pin 12 through the T-slot, the slider insert 15 and the slider insert pin 12 slide along the oblique hole direction of the product, and the slider insert pin 12 is pulled out of the product;

[0056] Sixth, the ejector rod of the injection molding machine passes through the KO hole 23, pushing the upper ejector plate 5 and the lower ejector plate 6 to move along the return pin 24, and the runner ejector pin 21 and the sleeve 20 fixed in the upper ejector plate 5 push the runner 22 and the product, so that the connection between the runner 22 and the product is separated, and the product is ejected from the mold at the same time;

[0057] Seventh, after completing the production of a whole mold product, the movable mold plate closes the mold again, and the various structures of the mold return to their original positions, and the next round of production is repeated.

[0058] In summary, the infusion set medicated injection parts injection molded by the technical solution of the present invention will not have residual bubbles during use, which is convenient for clinical operation and ensures the safety of patient infusion. At the same time, the flow channel and the product are automatically separated during the production process, the product appearance is smooth and beautiful, and the mold can be automatically produced, with a small size, high efficiency and a long service life.

[0059] Example 2

[0060] See also Figure 5 and Figure 6 In this embodiment, a cushion block 26 is provided on the end surface of the male template 3, and a cylinder 27 is provided on the cushion block 26. The end of the piston rod of the cylinder 27 passes through the cushion block 26 and is connected to the slider seat 16, that is, the sliding of the slider seat 16 is realized by the cylinder 27.

[0061] Specifically, in the present embodiment, since the movement stroke of the oil cylinder 27 can be very large, the movement stroke of the slider seat 16 can be adjusted by directly adjusting the oil cylinder 27 or replacing the oil cylinder 27, while the non-oil cylinder structure requires re-modification and processing of many mold parts; the oil cylinder 27 can more conveniently control the movement time and direction of the slider seat 16 (such as: directly adjusting the installation direction of the oil cylinder 27), while the non-oil cylinder structure requires the design of various oblique movement structures; the structure is simple and convenient for mold maintenance; the movement force of the oil cylinder can be controlled by adjusting the oil pressure.

[0062] It should be noted that, in this embodiment, the injection molding step of the molding mold includes:

[0063] First, fix the upper fixing plate 1 on the fixed platen of the injection molding machine, fix the lower fixing plate 7 on the movable platen of the injection molding machine, and place the injection molding machine nozzle close to the injection bushing 31 to inject the high-temperature molten plastic raw material into the injection bushing 31;

[0064] Second, the raw material flows into the product cavity 14 through the flow channel 22, fills the flow channel 22 and the product cavity 14, and solidifies under the temperature of the mold itself and the cooling of the water channel;

[0065] Third, the injection mold starts to move, the female mold plate 2 is separated from the male mold plate 3, driving the female mold core 8 to separate from the male mold core 9, the female mold core insert 11 is pulled out of the product, and the part of the flow channel 22 in the injection bushing 31 is removed from the injection bushing 31 and remains on the male mold core insert 10;

[0066] Fourth, the bundle block 17 fixed on the mother template 2 is separated from the slider seat 16, and the oil cylinder 27 connected to the oil pressure system of the injection molding machine starts to move, pulling the slider seat 16 to slide along the pressing block 19;

[0067] Fifth, the slider seat 16 pulls the slider insert 15 and the slider insert pin 12 through the T-slot, the slider insert 15 and the slider insert pin 12 slide along the oblique hole direction of the product, and the slider insert pin 12 is pulled out of the product;

[0068] Sixth, the ejector rod of the injection molding machine passes through the KO hole 23, pushing the upper ejector plate 5 and the lower ejector plate 6 to move along the return pin 24, and the runner ejector pin 21 and the sleeve 20 fixed in the upper ejector plate 5 push the runner 22 and the product, so that the connection between the runner 22 and the product is separated, and the product is ejected from the mold at the same time;

[0069] Seventh, after completing the production of a whole mold product, the moving mold plate closes the mold again, the cylinder pushes the slider seat back to its original position, the various structures of the mold return to their original positions, and the next round of production is repeated.

[0070] Example 3

[0071] See also Figure 7 In this embodiment, a male mold support plate 28 is provided between the male mold plate 3 and the upper ejector plate 5, the bundle block 17a is fixed in the through hole of the male mold support plate 28, and an angle pin 18a arranged obliquely upward is provided in the oblique hole of the male mold support plate 28;

[0072] The bottom of the female template 2 is provided with an opener and shutter 29, the bottom of which extends into the male template 3. The opener and shutter 29 is used to control the order of opening each template when opening the mold. When opening the mold, the male template 3 and the female template 2 are pulled, so that the female template 2 drives the male template 3 to move, so that the male template 3 and the male mold carrier plate 28 are opened first, and the male mold carrier plate 28 drives the bundle block 17a to separate from the slider insert 15a, and at the same time, the angle pin 18a drives the slider insert 15a to move. After the male template 3 and the male mold carrier plate 28 are fully opened, the slider insert pin 12 is completely pulled out from the product;

[0073] A limit rod 30 is provided on the top of the male mold plate 3, and the end of the limit rod 30 passes through the male mold plate 3 and is fixed on the male mold support plate 28. The limit rod 30 is used to limit the opening distance between the male mold plate 3 and the male mold support plate 28. When the slider pin 12 is completely pulled out of the product, the limit rod 30 fixed on the male mold support plate 28 just holds the male mold plate 3, so that the male mold support plate 28 and the male mold plate 3 cannot continue to open; as the mold opening action continues, the force on the opener 29 reaches the limit, and the female mold plate 2 and the male mold plate 3 are opened.

[0074] In a preferred embodiment of the present invention, the end of the angle pin 18a is obliquely upward and passes through the bundle block 17a and the male mold plate in sequence, and the angle between the axis and the axis of the injection bushing 31 is 8° to 25°.

[0075] It should be noted that, in this embodiment, the injection molding step of the molding mold includes:

[0076] First, fix the upper fixing plate 1 on the fixed platen of the injection molding machine, fix the lower fixing plate 7 on the movable platen of the injection molding machine, and place the injection molding machine nozzle close to the injection bushing 31 to inject the high-temperature molten plastic raw material into the injection bushing 31;

[0077] Second, the raw material flows into the product cavity 14 through the flow channel 22, fills the flow channel 22 and the product cavity 14, and solidifies under the temperature of the mold itself and the cooling of the water channel;

[0078] Third, the injection molding dynamic template starts to move, the female template 2 and the male template 3 are pulled by the shutter 29 and are not separated temporarily, but the male template 3 and the male mold carrier plate 28 are separated first, the bundle block 17a fixed on the male mold carrier plate 28 is separated from the slider insert 15a, the angle pin 18a hooks the slider insert 15a and the slider insert pin 12 to slide along the oblique hole direction of the product, and the slider insert pin 12 is pulled out of the product;

[0079] Fourth, after the male mold plate 3 is separated from the male mold support plate 28 by one end, the limit pull rod 30 pulls the male mold plate 3 and no longer separates. As the injection mold dynamic mold plate continues to move, the shutter 29 is pulled open, the female mold plate 2 is separated from the male mold plate 3, driving the female mold core 8 to separate from the male mold core 9, and the female mold core insert 11 is pulled out of the product. The part of the runner 22 in the injection bushing 31 is removed from the injection bushing 31 and remains on the male mold core insert 10;

[0080] Fifth, the ejector rod of the injection molding machine passes through the KO hole 23, pushing the upper ejector plate 5 and the lower ejector plate 6 to move along the return pin 24, and the runner ejector pin 21 and the sleeve 20 fixed in the upper ejector plate 5 push the runner 22 and the product, so that the connection between the runner 22 and the product is separated, and the product is ejected from the mold at the same time;

[0081] Sixth, after completing the production of a whole mold product, the movable mold plate closes the mold again, and the various structures of the mold return to their original positions, and the next round of production is repeated.

[0082] It should be further clarified that the above-mentioned embodiments are only described with a mold structure of one cavity. It can be understood that in other embodiments, the number of cavities of the mold can also be two cavities, three cavities, four cavities, ..., 28 cavities, ..., or even 100 cavities, all of which fall within the scope of the patent coverage of the present invention.

[0083] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An injection molding mold for an infusion set dosing injection piece, characterized in that: It includes an upper fixed plate, a female mold plate, a male mold plate, two mold feet and a lower fixed plate which are arranged in sequence from top to bottom, an upper ejector plate and a lower ejector plate are stacked between the two mold feet, the upper ejector plate and the lower ejector plate are fixed as a whole, and can move up and down between the lower fixed plate and the male mold plate; The bottom of the female mold plate is provided with a first injection molding component arranged downward, the male mold plate is provided with a second injection molding component arranged obliquely upward, and the lower fixed plate is provided with a third injection molding component arranged upward, the end of the third injection molding component is tightly attached to the end of the second injection molding component, and the end of the first injection molding component is tightly attached to the middle of the second injection molding component, so that a product cavity is formed between the first injection molding component, the second injection molding component and the third injection molding component; A flow channel is formed between the female template and the male template, a glue injection bushing extending downward and communicating with the flow channel is provided in the upper fixed plate, a flow channel ejector pin extending to the bottom of the flow channel is fixed on the upper ejector plate, and an end of the flow channel is communicated with the product cavity; A return pin is fixed on the upper ejector plate and penetrates the male template upwards. An angle pin is arranged obliquely in the female template, and the angle pin penetrates the male template, the upper ejector plate and the lower ejector plate downwards in sequence. The first injection molding component includes a mother mold core embedded in the bottom of the mother mold plate, and a mother mold core insert disposed in the mother mold core and facing downward, and an end of the mother mold core insert is tightly attached to the middle of the second injection molding component; The second injection molding assembly includes a male mold core disposed on the top of the male mold plate, a male mold core insert disposed in the male mold core, two slider seats disposed on both sides of the male mold core insert, a slider insert obliquely disposed on the slider seat, and two pressing blocks disposed on both sides of the slider seat; The top of the slider seat is fixed to the bottom of the female mold plate through a bundle block, the top of the slider insert respectively abuts against the side wall of the male mold insert and the bottom of the female mold, the slider insert is provided with a slider insert pin protruding from the top, and the end of the female mold insert is tightly attached to the middle of the slider insert pin; The connecting end of the slider insert and the slider seat is provided with a T-slot, which is slidably connected with the T-slot on the slider seat, and a plurality of the pressing blocks are fixed in the groove of the male template by screws, and the pressing blocks restrict the slider seat in the groove of the male template and can only slide along the pressing blocks; The angle between the axis of the angle pin and the axis of the injection bushing is 8° to 25°.

2. The injection molding mold for the drug-dosing injection piece of the infusion set according to claim 1, characterized in that: The third injection molding component includes a sleeve disposed on the upper ejector plate and extending into the male mold insert, and a sleeve ejector pin disposed in the sleeve, the bottom of the sleeve ejector pin is fixed in the lower fixed plate, and the end of the sleeve ejector pin is tightly attached to the end of the slider insert pin, so that a product cavity is formed between the female mold insert, the slider insert pin and the sleeve ejector pin.

3. The injection molding die for the medication injection piece of the infusion set according to claim 1, characterized in that: The end of the flow channel is connected to the side wall of the third injection molding component obliquely downward, and the cross-sectional area of ​​the connection is 0.1mm² to 1mm².

4. The injection molding mold for the drug-dosing injection piece of the infusion set according to claim 1, characterized in that: The included angle between the movement direction of the slider insert and the movement direction of the slider seat is 90±20°; The female mold core, the male mold core, the male mold core insert and the slide block insert are all provided with circulating cooling water channels.

5. The injection molding die for the drug-dosing injection piece of the infusion set according to claim 1, characterized in that: A cushion block is arranged on the end surface of the male mold plate, an oil cylinder is arranged on the cushion block, and the end of the piston rod of the oil cylinder passes through the cushion block and is connected with the sliding block seat.

6. The injection molding die for the drug-dosing injection piece of the infusion set according to claim 1, characterized in that: A male mold support plate is provided between the male mold plate and the upper ejection plate, the bundle block is fixed in the through hole of the male mold support plate, and an angle pin arranged obliquely upward is provided in the oblique hole of the male mold support plate; An opener and a shutter are provided at the bottom of the female template, and the bottom of the opener and a shutter extends into the male template; A limiting pull rod is provided on the top of the male mold plate, and the end of the limiting pull rod passes through the male mold plate and is fixed on the male mold supporting plate.

7. The injection molding die for the drug-dosing injection piece of the infusion set according to claim 6, characterized in that: The end of the angle pin is inclined upward and passes through the bundle block and the male mold plate in sequence, and the angle between the axis and the axis of the injection bushing is 8° to 25°.

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