Mould structure for Ruhr threaded core of injector

Abstract

The utility model discloses an injector Luer thread core mold structure, which relates to the technical field of injector molds, and comprises a thread demoulding mechanism, a hot runner mechanism and a bottom mold, the hot runner mechanism is positioned between the thread demoulding mechanism and the bottom mold, and the bottom mold is positioned between the hot runner mechanism and the bottom mold. The two sides of the hot runner mechanism are attached to the thread demolding mechanism and the bottom die correspondingly. A mold core is further mounted in the hot runner mechanism, and the two ends of the mold core extend to the thread demolding mechanism and the bottom mold correspondingly; the mold core comprises a driving rod and a threaded core which are arranged in a split mode, symmetrical key grooves are formed in the end, close to the driving rod, of the threaded core, and flat keys are placed between the driving rod and the threaded core and inserted into the key grooves; according to the utility model, the driving rod and the threaded core adopt a separated design, so that the damaged threaded core can be conveniently pulled out from the driving rod, and a worker can conveniently replace the threaded core under the condition that the mold is not discharged from a machine, so that the replacement time is shortened, and the normal production of the mold is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to syringe mould technical field, specifically a syringe luer thread core mould structure. BACKGROUND

[0002] The thread core structure of the syringe mould is a key part in mould design, which is mainly used for forming the threaded part on the syringe, at the beginning of injection molding, the plastic melt is injected into the mould cavity under the action of injection pressure, at this time the thread core is at the predetermined position and does not rotate, the plastic melt gradually fills the cavity, including the part to be formed into thread;

[0003] When the cavity is full, pressure is maintained for a period of time, so that the plastic melt is further compacted under the action of pressure to eliminate shrinkage holes and other defects in the plastic part, in this process, the thread core plays a role in forming the thread shape;

[0004] The rotating mechanism starts to work, drives the thread core to rotate in the direction opposite to the thread rotation, because the plastic will shrink during the cooling process and there is a certain friction between the plastic and the thread core, the rotation can gradually loosen the plastic part from the core.

[0005] However, in practice, it has been noticed that the injection mould product has thread teeth, and the thread core rotating demoulding is easy to wear the product and appear burr, the traditional structure spiral core and driving gear are an integral whole, when damage occurs, the mould needs to be stopped and disassembled for maintenance, at present, the mould technology is changing to hot runner mould, disassembling the mould will remove the complex hot runner system, and needs to be matched with professional personnel, consumes a long time, and affects production. UTILITY MODEL CONTENTS

[0006] The utility model discloses a syringe luer thread core mould structure, through the split type setting of driving rod and thread core, it is convenient to the quick dismounting of thread core, and the connecting place still is equipped with the keyway, the key, the elastic rubber ring and the steel ball, it is convenient to replace under the condition that the mould does not go down the machine, and can restore production quickly after replacement.

[0007] To achieve the above object, the utility model provides the following technical scheme:

[0008] A syringe luer thread core mould structure, including thread stripping mechanism, hot runner mechanism and bottom die, wherein the hot runner mechanism is located between the thread stripping mechanism and the bottom die, and the two sides of the hot runner mechanism are respectively attached with the thread stripping mechanism and the bottom die;

[0009] The hot runner mechanism is also provided with a mold core, and the two ends of the mold core extend to the thread stripping mechanism and the bottom die respectively.

[0010] As a further technical scheme of the utility model, the mould core includes the driving rod and the threaded core arranged in a split type, wherein the threaded core is provided with symmetrical key grooves at one end close to the driving rod, a flat key is arranged between the driving rod and the threaded core, the flat key is inserted into the key grooves, and the threaded core rotates through the cooperation of the flat key and the key grooves when the driving rod rotates.

[0011] As a further technical scheme of the utility model, the threaded core is further provided with a groove arranged in a ring shape at the outer side, and a steel ball is arranged in the groove, and the steel ball is located between the threaded core and the driving rod.

[0012] As a further technical scheme of the utility model, the inner side of the driving rod is provided with a clamping groove arranged in a ring shape, and an elastic rubber ring is arranged in the driving rod and clamped in the clamping groove of the driving rod.

[0013] As a further technical scheme of the utility model, the elastic rubber ring in the driving rod is located above the steel ball at the outer side of the threaded core, the threaded core is clamped by pressing the steel ball through the elastic rubber ring, and the radial position of the threaded core is limited.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] 1. The driving rod and the threaded core are designed in a split type, the damaged threaded core can be pulled out from the driving rod, the threaded core can be replaced by workers without stopping the mould, the replacement time is shortened, and the normal production of the mould is not affected.

[0016] 2. The threaded core arranged in a split type is provided with a key groove at one end close to the driving rod, the threaded core and the driving rod are connected through a flat key, the threaded core rotates through the flat key when the driving rod rotates, the threaded core can be conveniently disassembled, and the normal work between the driving rod and the threaded core is not affected.

[0017] 3. The threaded core is clamped by pressing the steel ball through the elastic rubber ring, the driving rod and the threaded core are connected, the threaded core can be pulled out by a force greater than the clamping force of the elastic rubber ring when the threaded core is worn, the threaded core can be conveniently disassembled, the hot runner mechanism does not need to be disassembled when being replaced, and therefore, the personnel operation is not needed, the replacement time is saved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structure schematic view of the utility model in use.

[0019] Figure 2 is a three-dimensional structure schematic view of the mould core in the utility model.

[0020] Figure 3is a partial enlarged view of the utility model Figure 2 .

[0021] Figure 4 is an internal structure schematic view of the utility model Figure 1 .

[0022] Figure 5 is a bottom structure schematic view of the utility model Figure 4 .

[0023] Figure 6 is a partial enlarged view of the utility model Figure 5 .

[0024] In the figure,

[0025] Threaded mechanism-1, hot runner mechanism-2, bottom die-3, mold core-4, driving rod-41, threaded core-42, keyway-43, flat key-44, elastic rubber ring-45, steel ball-46, injection mechanism-5. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0027] Please refer to Figures 1-6 , the utility model embodiment provides a kind of syringe luer thread core mold structure, including thread mechanism 1, hot runner mechanism 2 and bottom die 3, wherein, hot runner mechanism 2 is located between thread mechanism 1 and bottom die 3, and the two sides of hot runner mechanism 2 are respectively attached with thread mechanism 1 and bottom die 3;

[0028] Hot runner mechanism 2 is also installed with mold core 4, and both ends of mold core 4 extend to thread mechanism 1 and bottom die 3 respectively.

[0029] In the embodiment, the mold core 4 includes a split driving rod 41 and a threaded core 42, wherein the threaded core 42 has a symmetrical keyway 43 near one end of the driving rod 41, a flat key 44 is placed between the driving rod 41 and the threaded core 42, and the flat key 44 is inserted into the keyway 43. When the driving rod 41 rotates, the threaded core 42 rotates through the cooperation of the flat key 44 and the keyway 43.

[0030] Further, the threaded core 42 is further provided with a recess arranged in a ring shape on the outer side, and a steel ball 46 is placed in the recess, and the steel ball 46 is located between the threaded core 42 and the driving rod 41.

[0031] Further, the inner side of the driving rod 41 is provided with a ring-shaped clamping groove, and the elastic rubber ring 45 is clamped in the clamping groove of the driving rod 41.

[0032] Further, the elastic rubber ring 45 in the driving rod 41 is located above the steel ball 46 outside the threaded core 42, and the threaded core 42 is clamped and limited in the radial position by the elastic rubber ring 45 pressing the steel ball 46.

[0033] By adopting the above technical scheme, since the driving rod 41 and the threaded core 42 are arranged in a split type, when the threaded core 42 is worn, the threaded core 42 only needs to be pulled out by a force greater than the clamping force of the elastic rubber ring 45 after the thread stripping mechanism 1 and the hot runner mechanism 2 are separated, and the threaded core 42 is replaced, so that the mold production can be quickly restored without being taken off the machine, and the replacement can be completed without disassembling the hot runner mechanism 2.

[0034] In the embodiment, the inner side of the thread stripping mechanism 1, the inner side of the hot runner mechanism 2 and the inner side of the bottom mold 3 are respectively provided with a molding chamber, and the molding chambers in the thread stripping mechanism 1, the hot runner mechanism 2 and the bottom mold 3 are respectively communicated with each other.

[0035] Specifically, the side surface of the bottom mold 3 is fixedly connected with the injection molding mechanism 5, and the inner side of the end portion of the injection molding mechanism 5 is communicated with the molding chamber in the inner side of the bottom mold 3, the melted plastic particles are sent into the molding chamber in the inner side of the bottom mold 3 through pressure, and the product is formed by the cooperation of the molding chamber and the mold core 4.

[0036] Specifically, the mold core 4 is located in the molding chamber, and the product is integrally formed by the gap between the mold core 4 and the molding chamber.

[0037] The working principle of the utility model is: when in use, first, the melted plastic particles are injected into the molding chamber through the injection molding mechanism 5, when the threaded core 42 is damaged, only the threaded core 42 needs to be pulled out by a force greater than the clamping force of the elastic rubber ring 45 after the threaded stripping mechanism 1 is disassembled, without disassembling the hot runner mechanism 2, since the threaded core 42 is arranged in a split type, the threaded core 42 is replaced, since the hot runner mechanism 2 does not need to be disassembled, the mold production does not need to be taken off for replacement, so that the production can be quickly restored; the structure is simple, the operation is very convenient, and the labor intensity is effectively reduced.

[0038] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0039] Furthermore, it should be understood that although the present specification is described in terms of embodiments, not every embodiment according to the present specification needs to exhibit each and every characteristic specified in the present specification. The specification can also be described in terms of a single preferred embodiment, it being understood that this single preferred embodiment can exhibit not every aspect or feature of the present specification. The specification can also be described in terms of a generic statement that the disclosure can include one, some, or all of a list of features. It is further understood that the specification is to be considered as a whole and not with reference to a single feature or design element alone.

Claims

1. A structure of a mold for a luer thread core of a syringe, comprising a thread-removing mechanism (1), a hot runner mechanism (2), and a drag (3), wherein, The hot runner mechanism (2) is located between the thread stripping mechanism (1) and the bottom die (3), and the two sides of the hot runner mechanism (2) are respectively attached to the thread stripping mechanism (1) and the bottom die (3); The hot runner mechanism (2) is characterized in that the hot runner mechanism (2) is further provided with a mold core (4), and the two ends of the mold core (4) extend to the thread stripping mechanism (1) and the bottom die (3) respectively.

2. The syringe luer thread core mold structure of claim 1, wherein: The mold core (4) comprises a driving rod (41) and a threaded core (42) arranged in a split manner, wherein the threaded core (42) is provided with symmetrical key grooves (43) at one end close to the driving rod (41), a flat key (44) is arranged between the driving rod (41) and the threaded core (42), and the flat key (44) is inserted into the key grooves (43).

3. The syringe luer thread core mold structure of claim 2, wherein: The outer side of the threaded core (42) is further provided with an annular groove, and a steel ball (46) is arranged in the groove, and the steel ball (46) is located between the threaded core (42) and the driving rod (41).

4. The syringe luer thread core mold structure of claim 3, wherein: The inner side of the driving rod (41) is provided with an annular clamping groove, and the driving rod (41) is provided with an elastic rubber ring (45), and the elastic rubber ring (45) is clamped in the clamping groove in the driving rod (41).

5. The syringe luer thread core mold structure of claim 4, wherein: The elastic rubber ring (45) in the driving rod (41) is located above the steel ball (46) outside the threaded core (42).

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