Injection mold for near-end cover of hemostasis valve

Abstract

The utility model belongs to the technical field of medical instrument injection molding equipment, and particularly provides a hemostatic valve near-end cover injection mold which comprises an upper mold, a lower mold, mold feet and an ejection assembly, and the ejection assembly comprises a lifting ejection device and a pneumatic ejection device; the upper mold comprises an upper mold frame and an upper mold core, the upper mold core is embedded in the upper mold frame, the lower mold comprises a lower mold frame and a lower mold core, the lower mold core is embedded in the lower mold frame, and the upper mold frame and the lower mold core are matched to form an injection molding cavity; the lifting ejection device is arranged on the mold foot and comprises an ejector pin, the upper end of the ejector pin is flush with the bottom of the injection molding cavity, the pneumatic ejection device is arranged in the lower mold frame and comprises a pneumatic ejector pin, the section of the pneumatic ejector pin is in a circular ring shape, and the top of the pneumatic ejector pin is flush with the bottom of the injection molding cavity. The injection mold is simple in structure, reasonable in design and high in automation degree, and effectively solves the technical problem that end cover parts are difficult to demold after injection molding.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical instrument injection equipment, especially relates to a haemostatic valve proximal cover injection mold. BACKGROUND

[0002] The haemostatic valve is a kind of medical instrument, mainly used to control blood flow in the process of operation to prevent blood loss. One of the components in the haemostatic valve is called proximal cover, and its main production form is injection molding, but there are some technical difficulties in the process of injection molding of proximal cover.

[0003] Because the volume of the proximal cover of the haemostatic valve is very small, and the middle of the end cover is hollow, the ejector pin of the ordinary ejector mechanism cannot effectively act on the proximal cover, and the product cannot be ejected after injection molding, and manual unloading is needed, which greatly affects the injection efficiency of the proximal cover. In addition, it is not easy to control the stress surface when taking out the product by hand, which is easy to cause damage to the product during demolding.

[0004] Therefore, the above problems become technical problems that need to be solved. INVENTION CONTENT

[0005] The utility model discloses a kind of haemostatic valve proximal cover injection molds, its structure is simple, design is reasonable, degree of automation is high, effectively solve the technical problem that end cover class component is difficult to demold after injection molding.

[0006] Technical scheme: in order to realize the above-mentioned purpose, the utility model provides a kind of haemostatic valve proximal cover injection mold, including upper die, lower die, die foot and ejector assembly, the ejector assembly includes lifting ejector device and pneumatic ejector device;

[0007] The upper die includes upper die frame, upper die kernel, the upper die kernel is embedded in upper die frame, the lower die includes lower die frame, lower die kernel, the lower die kernel is embedded in lower die frame, the upper die frame and lower die kernel cooperate to form injection cavity;

[0008] The lifting ejector device is located on die foot, the lifting ejector device includes ejector pin, the upper end of the ejector pin is flush with the bottom of injection cavity, the pneumatic ejector device is located in lower die frame, the pneumatic ejector device includes pneumatic ejector pin, the cross section of the pneumatic ejector pin is circular ring, the top of the pneumatic ejector pin is flush with the bottom of injection cavity.

[0009] Because injection cavity is designed as one mold multiple holes, the lifting ejector device is moved up to act on the plastic part formed by the shunt after injection is completed, and the pneumatic ejector device directly acts on the bottom of the product, and the product and the plastic part connected to the product are ejected at the same time.

[0010] Further, the injection molding cavity comprises a runner and an injection mold cavity, the ejector pin communicates with the runner, and the pneumatic ejector pin communicates with the injection mold cavity.

[0011] Further, the pneumatic ejector device further comprises a gas source interface and a gas cylinder, the upper part of the gas cylinder is conical, the upper part of the gas cylinder is located in the injection mold cavity, the bottom of the gas cylinder is connected with the gas source interface, the bottom of the pneumatic ejector pin is provided with a piston, and the pneumatic ejector pin is slidably arranged in the gas cylinder. The upper part of the gas cylinder and the upper mold core and the lower mold core form a complete injection mold cavity, and the upper end of the gas cylinder serves as a part of the injection mold cavity.

[0012] Further, the upper mold further comprises a top plate, the top plate is provided with a positioning ring and a main runner, the main runner is located in the middle of the positioning ring and communicates with the upper mold core, the upper mold frame is provided with a guide hole, and the guide hole is provided with a sliding sleeve. The positioning ring is used for quickly connecting the injection molding machine, and the injection material enters the mold from the main runner.

[0013] Further, the lower mold frame is provided with a guide column, the guide column cooperates with the guide hole, and the bottom of the lower mold frame is provided with two positioning holes and guide holes. The guide column and the guide hole cooperate to play a guiding role during mold closing and mold opening.

[0014] Further, the mold foot comprises a bottom plate and a supporting leg, the supporting leg is arranged on both sides of the bottom plate, the supporting leg is provided with a positioning column, the positioning column cooperates with the positioning hole, and the middle of the bottom plate is provided with an ejecting hole.

[0015] Further, the lifting ejector device further comprises a lifting plate and a guide column two, the ejector pin and the guide column two are arranged on the lifting plate, the guide column two cooperates with the guide hole two, the ejector pin can pass through the lower mold frame to enter the injection molding cavity, a reset spring is sleeved on the guide column two, and a group of guide columns three are further arranged on the lifting plate. The bottom of the lifting plate communicates with the ejecting hole. The guide column two cooperates with the guide hole two to play a guiding role on the lifting plate, and the reset spring can make the lifting plate return to the original position. The external power device acts on the lifting plate through the ejecting hole to provide power for the upward movement of the lifting plate.

[0016] Further, the upper mold frame and the lower mold frame are both provided with cooling water inlets and outlets and exhaust ports. The cooling water inlets and outlets circulate cooling water to help the injection molding product cool quickly and improve the injection molding efficiency. The exhaust ports can exhaust the air in the plastic during injection molding to prevent the generation of bubbles and affect the product quality.

[0017] Further, a group of external guide devices are further included, the external guide devices comprise upper guide blocks and lower guide blocks and guide columns, the upper guide blocks and the lower guide blocks are arranged on the side surfaces of the upper mold frame and the lower mold frame respectively, and the guide columns are arranged on the upper guide blocks and the lower guide blocks. The external guide devices play a further guiding role.

[0018] Further, the locking device includes a locking block, and upper and lower ends of the locking block are detachably connected with the upper die frame and the lower die frame respectively.

[0019] The technical scheme has the following beneficial effects:

[0020] The injection mold for the proximal end cover of the hemostatic valve has simple structure, high mold closing and opening precision and high injection efficiency, and the pneumatic ejection device and the lifting ejection device are further designed, the pneumatic ejection device can effectively act on the product in the end cover and is used for ejecting the product, the lifting ejection device assists the product in demolding while ejecting the excess material in the flow distribution channel, the technical problem that the product needs to be demolded manually is solved, the injection efficiency is improved, and the quality of the product is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A structure diagram of the injection mold for the proximal end cover of the hemostatic valve;

[0022] Figure 2 An exploded view of the injection mold for the proximal end cover of the hemostatic valve;

[0023] Figure 3 A top view of the injection mold for the proximal end cover of the hemostatic valve;

[0024] Figure 4 A Figure 3 A cross-sectional view along A-A direction;

[0025] Figure 5 A structure diagram of the injection cavity of the injection mold (lower half part);

[0026] Figure 6 A structure diagram of the upper die frame.

[0027] In the figure: 1-upper die, 11-upper die frame, 111-guide hole, 12-upper die core, 13-top plate, 131-positioning ring, 132-main flow channel, 2-lower die, 21-lower die frame, 211-guide column, 22-lower die core, 3-die foot, 31-bottom plate, 32-leg, 33-positioning column, 4-lifting ejection device, 41-needle, 42-lifting plate, 43-guide column two, 44-return spring, 45-guide column three, 5-pneumatic ejection device, 51-pneumatic needle, 52-gas source interface, 53-gas cylinder, 6-cooling water inlet and outlet, 7-exhaust port, 81-upper guide block, 82-lower guide block, 83-guide column, 9-locking block. DETAILED DESCRIPTION

[0028] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0029] like Figures 1-6 As shown, a hemostatic valve proximal cap injection mold includes an upper mold 1, a lower mold 2, a mold foot 3, and an ejection assembly, wherein the ejection assembly includes a lifting ejection device 4 and a pneumatic ejection device 5;

[0030] The upper mold 1 includes an upper mold frame 11 and an upper mold core 12, the upper mold core 12 being embedded in the upper mold frame 11. The lower mold 2 includes a lower mold frame 21 and a lower mold core 22, the lower mold core 22 being embedded in the lower mold frame 21. The upper mold frame 11 and the lower mold core 22 cooperate to form an injection molding cavity.

[0031] The lifting ejection device 4 is mounted on the mold base 3. The lifting ejection device 4 includes an ejector pin 41. The upper end of the ejector pin 41 is flush with the bottom of the injection cavity. The pneumatic ejection device 5 is mounted inside the lower mold base 21. The pneumatic ejection device 5 includes a pneumatic ejector pin 51. The cross-section of the pneumatic ejector pin 51 is annular. The top of the pneumatic ejector pin 51 is flush with the bottom of the injection cavity.

[0032] Among them, such as Figure 5 As shown, the injection cavity includes a runner 101 and an injection mold cavity 102. The ejector pin 41 is connected to the runner 101, and the pneumatic ejector pin 51 is connected to the injection mold cavity 102.

[0033] After injection molding is completed, this invention simultaneously activates the lifting ejector device and the pneumatic ejector device 5. The pneumatic ejector pins 51 and 41 rise simultaneously, acting on the injection mold cavity 102 and the runner 101 respectively, ejecting the material in the runner 101 and the product from the injection mold cavity 102. The pneumatic ejector pin 51 is annular, and its upper end face can act on the bottom of the near end cap, and the force on the near end cap is uniform.

[0034] like Figure 4 As shown, the pneumatic ejection device 5 also includes an air source interface 52 and an air cylinder 53. The upper part of the air cylinder 53 is conical and located in the injection mold cavity 102. The bottom of the air cylinder 53 is connected to the air source interface 52. The bottom of the pneumatic ejector pin 51 is provided with a piston, and the pneumatic ejector pin 51 is slidably disposed inside the air cylinder 53. The air source device supplies high-pressure gas to the air source interface 52. The high-pressure gas enters the air cylinder 53, driving the piston at the bottom of the pneumatic ejector pin 51 to move upward in the air cylinder 53 and thus moving the pneumatic ejector pin 51 upward.

[0035] Specific, the upper die 1 also includes a top plate 13, the top plate 13 is provided with a positioning ring 131 and a main runner 132, the main runner 132 is located in the middle of the positioning ring 131 and communicates with the upper die core 12, the upper die holder 11 is provided with a guide hole 111, the guide hole 111 is provided with a sliding sleeve.

[0036] Specific, the lower die holder 21 is provided with a guide column 211, the guide column 211 cooperates with the guide hole 111, the lower die holder 21 is provided with a positioning hole and a guide hole at the bottom.

[0037] Preferably, the die foot 3 includes a bottom plate 31, a leg 32, the leg 32 is arranged on both sides of the bottom plate 31, the leg 32 is provided with a positioning column 33, the positioning column 33 cooperates with the positioning hole, the middle of the bottom plate 31 is provided with an ejection hole.

[0038] As shown in Figure 2 , Figure 4 The lifting and ejecting device 4 also includes a lifting plate 42 and a guide column two 43, the ejector pin 41 and the guide column two 43 are arranged on the lifting plate 42, the guide column two 43 cooperates with the guide hole two, the ejector pin 41 can pass through the lower die holder 21 into the injection molding cavity, the guide column two 43 is sleeved with a reset spring 44, the lifting plate 42 is also provided with a group of guide column three 45, the bottom of the lifting plate 42 communicates with the ejection hole. After injection molding, the lifting plate 42 moves upwards to drive the ejector pin 41 to move upwards, the ejector pin 41 enters the shunt channel 101 to eject the formed plastic part therein, which also plays a role in assisting product demolding. In the process of moving upwards of the lifting plate 42, the reset spring 44 is compressed to provide power for the return of the lifting plate 42, and the guide column three 45 provides movement guide for the lifting plate 42.

[0039] As shown in Figure 1 The upper die holder 11 and the lower die holder 21 are both provided with a cooling water inlet and outlet 6 and an exhaust port 7.

[0040] In addition, it also includes a group of external guide devices, the external guide devices include an upper guide block 81, a lower guide block 82 and a guide column 83, the upper guide block 81 and the lower guide block 82 are arranged on the side surfaces of the upper die holder 11 and the lower die holder 21 respectively, the guide column 83 is arranged through the upper guide block 81 and the lower guide block 82. It also includes a locking device, the locking device includes a locking block 9, the upper and lower ends of the locking block 9 are detachably connected with the upper die holder 11 and the lower die holder 21 respectively through bolts. The external guide device can provide guiding effect when the upper die 1 and the lower die 2 are clamped and opened, and can provide the precision and speed of clamping. The locking device is used to lock the upper die 1 and the lower die 2 in the clamped state, and maintain the stability of the clamped state.

[0041] In addition, it needs to be explained that the injection mold can also be used for injection molding of the plastic gasket of the hemostatic valve, and only different inserts are arranged in the injection cavity to change the cavity structure to realize the injection molding of the plastic gasket, and the structure principle is consistent. The injection cavity in the utility model is one mold with four holes, which can be used for simultaneously injection molding four proximal covers or four plastic gaskets, and can also simultaneously injection molding two proximal covers and two plastic gaskets.

[0042] The above only describes the preferred embodiments of the utility model, and it should be pointed out that for ordinary skilled persons in the technical field, several improvements can be made without departing from the principles of the utility model, and these improvements should also be regarded as the protection range of the utility model.

Claims

1. A hemostatic valve proximal cap injection mold, characterized by, It comprises an upper die (1), a lower die (2), a die foot (3) and an ejection assembly, the ejection assembly comprises a lifting ejection device (4) and a pneumatic ejection device (5); The upper die (1) comprises an upper die frame (11) and an upper die core (12), the upper die core (12) is embedded in the upper die frame (11), the lower die (2) comprises a lower die frame (21) and a lower die core (22), the lower die core (22) is embedded in the lower die frame (21), the upper die frame (11) and the lower die core (22) cooperate to form an injection molding cavity; The lifting ejection device (4) is arranged on the die foot (3), the lifting ejection device (4) comprises a ejector pin (41), the upper end of the ejector pin (41) is flush with the bottom of the injection molding cavity, the pneumatic ejection device (5) is arranged in the lower die frame (21), the pneumatic ejection device (5) comprises a pneumatic ejector pin (51), the cross section of the pneumatic ejector pin (51) is a circular ring, the top of the pneumatic ejector pin (51) is flush with the bottom of the injection molding cavity.

2. The hemostatic valve proximal cover injection mold of claim 1, wherein, The injection molding cavity comprises a distribution channel (101) and an injection molding cavity (102), the ejector pin (41) communicates with the distribution channel (101), and the pneumatic ejector pin (51) communicates with the injection molding cavity (102).

3. The hemostatic valve proximal cover injection mold of claim 2, wherein, The pneumatic ejection device (5) further comprises a gas source interface (52) and a gas cylinder (53), the upper part of the gas cylinder (53) is conical, the upper part of the gas cylinder (53) is located in the injection molding cavity (102), the bottom of the gas cylinder (53) is connected with the gas source interface (52), the bottom of the pneumatic ejector pin (51) is provided with a piston, and the pneumatic ejector pin (51) is slidingly arranged in the gas cylinder (53).

4. The hemostatic valve proximal cover injection mold of claim 1, wherein, The upper die (1) further comprises a top plate (13), the top plate (13) is provided with a positioning ring (131) and a main flow channel (132), the main flow channel (132) is located in the middle of the positioning ring (131) and communicates with the upper die core (12), the upper die frame (11) is provided with a guide hole (111), and the guide hole (111) is provided with a sliding sleeve.

5. The hemostatic valve proximal cover injection mold of claim 4, wherein, The lower die frame (21) is provided with a guide column (211), the guide column (211) cooperates with the guide hole (111), and the bottom of the lower die frame (21) is provided with a positioning hole and a guide hole two.

6. The hemostatic valve proximal cover injection mold of claim 5, wherein, The die foot (3) comprises a bottom plate (31) and a supporting leg (32), the supporting leg (32) is arranged on both sides of the bottom plate (31), the supporting leg (32) is provided with a positioning column (33), the positioning column (33) cooperates with the positioning hole, and the middle of the bottom plate (31) is provided with an ejection hole.

7. The hemostatic valve proximal cover injection mold of claim 6, wherein, The lifting ejection device (4) further comprises a lifting plate (42) and a guide column two (43), the ejector pin (41) and the guide column two (43) are arranged on the lifting plate (42), the guide column two (43) cooperates with the guide hole two, the ejector pin (41) can pass through the lower die frame (21) to enter the injection molding cavity, a reset spring (44) is sleeved on the guide column two (43), a group of guide columns three (45) are further arranged on the lifting plate (42), and the bottom of the lifting plate (42) communicates with the ejection hole.

8. The hemostatic valve proximal cover injection mold of claim 1, wherein, The upper die frame (11) and the lower die frame (21) are both provided with a cooling water inlet and outlet (6) and an exhaust port (7).

9. The hemostatic valve proximal cover injection mold of claim 1, wherein, It also comprises a set of external guiding devices, which include upper guiding blocks (81) and lower guiding blocks (82) and guiding columns (83), the upper guiding blocks (81) and the lower guiding blocks (82) are respectively arranged on the side surfaces of the upper die holder (11) and the lower die holder (21), and the guiding columns (83) are arranged through the upper guiding blocks (81) and the lower guiding blocks (82).

10. The hemostatic valve proximal cover injection mold of claim 1, wherein, It also comprises locking devices, which include locking blocks (9), the upper and lower ends of the locking blocks (9) are respectively detachably connected with the upper die holder (11) and the lower die holder (21) through bolts.

Images