Medical needle tube plastic mold demolding mechanism

Abstract

The utility model discloses a medical needle tube plastic mold demoulding mechanism, which relates to the technical field of molds, and comprises an upper mold and a lower mold, the middle part of the lower surface of the upper mold is fixedly provided with a first mold core, the bottom end of the first mold core is provided with a second mold core, and the bottom end of the second mold core is provided with a slot; a third mold core is arranged in the inserting groove in an inserted mode, and mold cavities corresponding to the first mold core, the second mold core and the third mold core are formed in the lower mold. The first mold core, the second mold core and the third mold core are arranged below the upper mold, the second mold core and the third mold core can slide, after injection molding production of a needle tube product is completed, the third mold core moves downwards to eject the bottom end of a needle tube downwards, and the second mold core moves downwards to eject the lower portion of the needle tube downwards; therefore, the problem that the needle tube is adsorbed on the mold after being formed can be solved, and the effect of automatic demolding is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould technical field especially relates to a medical needle tube plastic mould demoulding mechanism. BACKGROUND

[0002] Medical treatment is an important part in our life, and injection needle tube is an essential component in medical apparatus and instruments. Because of the advantages of convenient use and safety and sanitation, injection needle tube has been widely used in medical industry. Injection needle tube is generally processed by injection molding method. The shape and size of injection molding product are various, and the size is accurately controllable. The injection molding process generally includes the following steps: mold closing, injection, pressure maintaining, cooling, mold opening and product taking out.

[0003] Such as the disclosure number for CN214773832U a kind of medical injection needle tube injection mould, it includes upper mould and lower mould, cooling sandwich is equipped in the lower mould die wall, multiple prefabricated baffle are transversely separated in cooling sandwich, prefabricated baffle has multiple through-holes, the through-hole aperture of prefabricated baffle located in the upstream of cooling sandwich is less than the through-hole aperture of prefabricated baffle located in the downstream of cooling sandwich, the water of cooling sandwich is shunted into multiple small tributaries by the through-hole on prefabricated baffle, its instantaneous flow rate accelerates, has the propelling effect to next water flow;The accelerated water flow can increase the irregular motion degree inside water flow, accelerate the convection inside cooling water, accelerate the heat transfer in cooling water, and cooling speed accelerates. The present application has the effect of shortening cooling time and improving work efficiency.

[0004] The above technical scheme has some problems in actual application. The needle tube product is adsorbed in the mold during molding, and manual intervention is required to complete demolding, which has low demolding efficiency.

[0005] Therefore, it is necessary to invent a medical needle tube plastic mould demolding mechanism to solve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a medical needle tube plastic mould demolding mechanism to solve the problems in the above background art.

[0007] In order to achieve the above object, the utility model provides the following technical scheme: a medical needle tube plastic mould stripping mechanism, including upper die and lower die, the lower surface middle part of upper die is fixedly provided with first mould core, the bottom of first mould core is provided with second mould core, the bottom of second mould core is provided with the slot, the inside of slot is provided with third mould core, the inside of lower die is provided with the mould cavity corresponding to first mould core, second mould core, third mould core, the top of slot is provided with limiting slot, the top of third mould core is fixedly provided with limiting ring, and limiting ring is arranged in the inside of limiting slot, the lower surface of limiting ring and the bottom of limiting slot are provided with return spring, the top middle part of third mould core is provided with gas guide groove, and gas guide groove is provided as inverted boss structure, the inside wall bottom of gas guide groove is provided with a plurality of gas guide holes, and one end of gas guide hole extends to the outside wall of third mould core, the inside wall top of slot is fixedly provided with gas guide pipe.

[0008] Preferably, the middle part of the upper die is provided with a through slot, and the gas guide pipe is provided in the inside of the through slot.

[0009] Preferably, the upper surface of the upper die is provided with two insertion holes, the inside of the insertion hole is provided with an insertion rod, and the bottom end of the insertion rod is fixedly provided on the top end of the second mold core.

[0010] Preferably, the top end of the insertion rod is fixedly provided with a connecting plate, and a tension spring is arranged between the connecting plate and the upper surface of the upper die.

[0011] Preferably, the inside of the lower die is provided with a flow guide groove, and the flow guide groove is provided as a spiral structure.

[0012] Preferably, the two sides of the lower die are provided with flow guide pipes, and the two flow guide pipes extend to the two ends of the flow guide groove.

[0013] The utility model discloses the technical effect and advantage:

[0014] 1, the utility model discloses a first mould core, second mould core and third mould core are arranged below the upper die, and the second mould core and the third mould core can slide, after the needle tube product completes injection molding production, the third mould core moves downward and ejects the bottom end of the needle tube, the second mould core moves downward and ejects the lower part of the needle tube, thereby can solve the problem that the needle tube is adsorbed on the mould after forming, to reach the effect of automatic stripping;

[0015] 2. The utility model discloses a third mold core is provided, the top of third mold core is provided with the air guide groove, the bottom of air guide groove is provided with a plurality of air guide holes, and the product is formed after, and the compressed gas enters the air guide groove through the air guide pipe, compressed air drives third mold core to move down at this moment, after third mold core drives the product to move down a distance, compressed gas enters the product inside through the air guide hole, and pushes the product to move down, to realize the further stripping treatment of product. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is whole structure schematic diagram of the utility model.

[0017] Fig. 2 It is whole structure cross section schematic diagram of the utility model.

[0018] Fig. 3 It is first mold core, second mold core and third mold core structure schematic diagram of the utility model.

[0019] In the drawing: 1, upper die;2, lower die;3, first mold core;4, second mold core;5, slot;6, third mold core;7, limit slot;8, limit ring;9, return spring;10, air guide groove;11, air guide hole;12, air guide pipe;13, through slot;14, insertion hole;15, insertion rod;16, connecting plate;17, tension spring;18, flow guide groove;19, flow guide pipe. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0021] The utility model provides a kind of medical needle tube plastic mould stripping mechanism as shown in Figs. 1-3 In the drawing: 1, upper die;2, lower die;3, first mold core;4, second mold core;5, slot;6, third mold core;7, limit slot;8, limit ring;9, return spring;10, air guide groove;11, air guide hole;12, air guide pipe;13, through slot;14, insertion hole;15, insertion rod;16, connecting plate;17, tension spring;18, flow guide groove;19, flow guide pipe.

[0022] Specific, the top of the slot 5 is provided with a limiting slot 7, the top of the third mold core 6 is fixedly provided with a limiting ring 8, and the limiting ring 8 is arranged in the limiting slot 7, a reset spring 9 is arranged between the lower surface of the limiting ring 8 and the bottom of the limiting slot 7, a gas guide groove 10 is arranged in the middle of the top of the third mold core 6, and the gas guide groove 10 is arranged as an inverted boss structure, a plurality of gas guide holes 11 are arranged at the bottom of the inner side wall of the gas guide groove 10 and extend to the outer side wall of the third mold core 6, and a gas guide pipe 12 is fixedly arranged at the top of the inner side wall of the slot 5 and can be connected with a compressed air pump to realize injection of compressed air.

[0023] More specifically, the middle of the upper die 1 is provided with a through slot 13, and the gas guide pipe 12 is arranged in the through slot 13 and can slide in the through slot 13, so as not to affect the movement of the second mold core 4.

[0024] In addition, the upper surface of the upper die 1 is provided with two insertion holes 14, an insertion rod 15 is arranged in the insertion hole 14, the bottom of the insertion rod 15 is fixedly arranged at the top of the second mold core 4, a connecting plate 16 is fixedly arranged at the top of the insertion rod 15, a tension spring 17 is arranged between the connecting plate 16 and the upper surface of the upper die 1, the tension spring 17 acts on the connecting plate 16, so that the connecting plate 16 drives the insertion rod 15 to move downward, the insertion rod 15 drives the second mold core 4 to move downward, and the second mold core 4 pushes the needle tube product downward to facilitate demolding of the product.

[0025] In addition, the lower die 2 is provided with a flow guide groove 18, and the flow guide groove 18 is arranged as a spiral structure, and the flow guide groove 18 is provided with two flow guide pipes 19 arranged at both sides of the lower die 2 and extending to both ends of the flow guide groove 18, and the flow guide groove 18 can be injected with refrigerant to realize cooling and temperature reduction during product forming.

[0026] The working principle of the utility model is as follows:

[0027] When the device is used, the needle tube product is injection molded in the mold cavity between the upper die 1 and the lower die 2, after the needle tube product is formed, the lower die 2 moves downward and separates from the product, at this time, the tension spring 17 acts on the connecting plate 16, so that the connecting plate 16 drives the insertion rod 15 to move downward, the insertion rod 15 drives the second mold core 4 to move downward, and the second mold core 4 pushes the needle tube product downward, then the compressed air is injected into the gas guide groove 10 through the gas guide pipe 12, the compressed air in the gas guide groove 10 extrudes the third mold core 6, so that the third mold core 6 drives the bottom of the needle tube product to move downward, and the third mold core 6 moves out of the slot 5, at this time, the compressed air enters the inside of the needle tube product through the gas guide hole 11, so that the needle tube product separates from the third mold core 6 under the pushing of the compressed gas, and thus the demolding of the product can be completed.

[0028] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A medical needle tube plastic mold demoulding mechanism, comprising an upper mold (1) and a lower mold (2), characterized in that: A first mold core (3) is fixedly provided at the middle of the lower surface of the upper mold (1), a second mold core (4) is provided at the bottom end of the first mold core (3), a slot (5) is provided at the bottom end of the second mold core (4), a third mold core (6) is inserted into the interior of the slot (5), and mold cavities corresponding to the first mold core (3), the second mold core (4), and the third mold core (6) are provided inside the lower mold (2), a limiting groove (7) is provided at the top end of the slot (5), and a limiting ring (8) is fixedly provided at the top end of the third mold core (6). , and a limiting ring (8) is arranged inside the limiting groove (7), a return spring (9) is arranged between the lower surface of the limiting ring (8) and the bottom of the limiting groove (7), an air guide groove (10) is provided at the middle of the top end of the third mold core (6), and the air guide groove (10) is arranged as an inverted boss structure, a plurality of air guide holes (11) are provided through the bottom end of the inner side wall of the air guide groove (10), and one end of the air guide hole (11) extends to the outer side wall of the third mold core (6), and an air guide tube (12) is fixedly provided at the top end of the inner side wall of the slot (5).

2. The medical needle tube plastic mold demoulding mechanism according to claim 1, characterized in that: A through groove (13) is provided through the middle of the upper mold (1), and the air guide tube (12) is provided through the interior of the through groove (13).

3. The medical needle tube plastic mold demoulding mechanism according to claim 2, characterized in that: Two insertion holes (14) are provided through the upper surface of the upper mold (1), and an insertion rod (15) is inserted into the interior of the insertion hole (14), and the bottom end of the insertion rod (15) is fixedly provided on the top end of the second mold core (4).

4. The medical needle tube plastic mold demoulding mechanism according to claim 3, characterized in that: A connecting plate (16) is fixedly provided at the top end of the inserting rod (15), and a tension spring (17) is provided between the connecting plate (16) and the upper surface of the upper mold (1).

5. The medical needle tube plastic mold demoulding mechanism according to claim 4, characterized in that: A guide groove (18) is provided inside the lower mold (2), and the guide groove (18) is configured as a spiral structure.

6. The medical needle tube plastic mold demoulding mechanism according to claim 5, characterized in that: Both sides of the lower mold (2) are penetrated by flow guide tubes (19), and the two flow guide tubes (19) extend to the two ends of the flow guide groove (18) respectively.

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