Open type hot nozzle with automatic glue sealing function

Abstract

The utility model relates to the technical field of hot nozzles, in particular to an open type hot nozzle with an automatic glue sealing function, a cold material part is fixedly arranged at the outer end of a feeding part and used for receiving molten plastic flowing out of the feeding part and conducting heat dissipation on the molten plastic, one end of a protection part is fixedly connected with the feeding part, and the other end of the protection part is fixedly connected with a material sealing opening. The protection part is fixedly arranged on the outer ring of the cold material part, and the cold material part is protected in the protection part; the plastic in the small end of the material sealing opening is cooled and solidified firstly to form a physical barrier to block the molten plastic in the cold material pipe, so that the glue sealing effect is achieved; the spiral cold material pipe prolongs the length of molten plastic in the cold material pipe, the heat dissipation effect is enhanced, the thickness of the cold material pipe at the conical grooves is reduced, heat dissipation is facilitated, the conical grooves are distributed at intervals, the strength of the cold material pipe is guaranteed, the cold material pipe is supported in the protective shell through the supporting columns, the supporting columns do not make contact with the protective shell, and heat dissipation of the cold material pipe is better facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot nozzle technical field, especially open hot nozzle with automatic glue sealing function. BACKGROUND

[0002] The open hot nozzle on the hot runner is a component for plastic injection molding, which allows molten plastic to flow directly from the injection machine into the cavity of the mold through the heated channel. Unlike the needle valve hot nozzle, the open hot nozzle does not have a mechanical closing gate device, but relies on the pressure and cooling during mold opening to achieve glue sealing. The open hot nozzle generally needs to leave a certain length of cold material stick at the nozzle head, and the nozzle head sleeve needs to be in full contact with the mold core, which helps to increase the heat dissipation of the nozzle head and puts higher requirements on the cooling environment near the nozzle head.

[0003] The cold material stick is mostly in a straight line form. If the cold material stick is too short, the heat dissipation is not timely, and the molten plastic is easy to form a filament at the hot nozzle and the mold gate, affecting the product quality. If the cold material stick is too long, although it can fully dissipate heat, the distance between the hot nozzle and the gate is large, and the hot nozzle is easy to be knocked off from the gate by external force, affecting the injection progress. SUMMARY

[0004] The main purpose of the utility model is to provide an open hot nozzle with automatic glue sealing function to solve the problems of the straight line form of the cold material stick being too short, the heat dissipation being not timely, the cold material stick being too long, the distance between the hot nozzle and the gate being large, and the hot nozzle being easy to be knocked off from the gate by external force.

[0005] In order to achieve the above purpose, according to one aspect of the utility model, an open hot nozzle with automatic glue sealing function is provided, which comprises: a feeding part connected with an injection molding machine, used for receiving the molten plastic pressed out by the injection molding machine;

[0006] A cold material part is fixedly arranged at the outer end of the feeding part, used for receiving the molten plastic flowing out of the feeding part and dissipating heat for the molten plastic;

[0007] A protection part is fixedly connected with the feeding part at one end and fixedly connected with a sealing gate at the other end, and is fixedly arranged at the outer circle of the cold material part to protect the cold material part therein;

[0008] The sealing gate is fixedly arranged at one end of the cold material part, and the molten plastic in the cold material part is introduced into the mold. When the mold is pressure-cooled, the plastic in the cold material part is cooled and solidified to seal the molten plastic in the cold material part.

[0009] Further, the feeding part comprises a feeding pipe and a connecting pipe, the connecting pipe is in a hollow circular truncated cone shape, the large end of the connecting pipe is fixedly connected with the front end of the feeding pipe, and the small end is fixedly connected with the rear end of the cold material part.

[0010] Further, the sealing port is frustum-shaped, and the large end of the sealing port is fixedly connected with the front end of the cold material part, and the small end is connected with the feeding port of the mold.

[0011] Further, the cold material part comprises a cold material pipe and a plurality of tapered grooves, the cold material pipe is spiral-shaped, the tapered grooves are arranged on the outer ring of the cold material pipe, the rear end of the cold material pipe is fixedly connected with the small end of the connecting pipe, and the front end is fixedly connected with the large end of the sealing port.

[0012] Further, the protection part comprises a protection shell, a plurality of heat dissipation holes, a supporting ring and a plurality of supporting columns, the rear end of the protection shell is fixedly connected with the front end of the feeding pipe.

[0013] Further, the heat dissipation holes are arranged on the protection shell, the supporting ring is fixedly arranged on the inner side of the front end of the protection shell and is fixedly connected with the outer ring of the sealing port, the supporting columns are fixedly arranged on the inner ring of the protection shell in a spiral shape, the spiral direction of the supporting columns is consistent with the spiral direction of the cold material pipe, and the inner ends of the supporting columns are fixedly connected with the outer ring of the cold material pipe.

[0014] Compared with the prior art, the plastic in the small end of the sealing port is cooled and solidified first to form a physical barrier to block the molten plastic in the cold material pipe, so that the glue sealing effect is achieved; the spiral-shaped cold material pipe prolongs the length of the molten plastic in the cold material pipe, enhances the heat dissipation effect, the thickness of the cold material pipe at the tapered grooves is reduced, which is beneficial to heat dissipation, the tapered grooves are distributed at intervals to ensure the strength of the cold material pipe, the supporting columns support the cold material pipe in the protection shell and do not contact the protection shell, which is more beneficial to heat dissipation of the cold material pipe. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a whole schematic view of the utility model;

[0016] Fig. 2 It is a sectional view of the utility model;

[0017] Fig. 3 It is a protection part structure schematic view of the utility model;

[0018] Fig. 4 It is a cold material part structure schematic view of the utility model.

[0019] ILLUSTRATION:

[0020] 1, feeding part; 11, feeding pipe; 12, connecting pipe;

[0021] 2, protection part; 21, protection shell; 22, heat dissipation hole; 23, supporting ring; 24, supporting column;

[0022] 3, sealing port;

[0023] 4, cold material part; 41, cold material pipe; 42, conical groove. DETAILED DESCRIPTION

[0024] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model will be described in detail as follows in combination with the drawings and preferred embodiments.

[0025] Please refer to Figs. 1 to 4 The embodiment provides an open hot nozzle with automatic glue sealing function, which comprises: a feeding part 1 connected with an injection molding machine, used for receiving molten plastic extruded by the injection molding machine;

[0026] A cold material part 4 is fixedly arranged at the outer end of the feeding part 1, used for receiving molten plastic flowing out of the feeding part 1 and conducting heat dissipation on the molten plastic;

[0027] A protection part 2 is fixedly connected with the feeding part 1 at one end and fixedly connected with a sealing port 3 at the other end, and the protection part 2 is fixedly arranged at the outer circle of the cold material part 4 to protect the cold material part 4;

[0028] The sealing port 3 is fixedly arranged at one end of the cold material part 4, and the molten plastic in the cold material part 4 is introduced into a mold, and when the mold is pressure-cooled, the plastic in the cold material part 4 is cooled and solidified to seal the molten plastic in the cold material part 4.

[0029] The feeding part 1 comprises a feeding pipe 11 and a connecting pipe 12, the connecting pipe 12 is in the shape of a hollow circular truncated cone, the large end of the connecting pipe 12 is fixedly connected with the front end of the feeding pipe 11, and the small end is fixedly connected with the rear end of the cold material part 4, and the connecting pipe 12 introduces the molten plastic from the feeding pipe 11 into the cold material pipe 41.

[0030] The sealing port 3 is in the shape of a circular truncated cone, the large end of the sealing port 3 is fixedly connected with the front end of the cold material part 4, and the small end is connected with the feeding port of the mold, and the small end is far away from the cold material pipe 41, which is easier to conduct heat dissipation, and when the mold is pressure-cooled, the plastic in the small end of the sealing port 3 is cooled and solidified first to form a physical barrier to block the molten plastic in the cold material pipe 41, thereby achieving the glue sealing effect.

[0031] The cold material part 4 comprises a cold material pipe 41 and a plurality of conical grooves 42, the cold material pipe 41 is in the shape of a spiral, the length of the molten plastic in the cold material pipe 41 is prolonged, and the heat dissipation effect is enhanced, the conical grooves 42 are all arranged at the outer circle of the cold material pipe 41, the thickness of the cold material pipe 41 at the conical grooves 42 is reduced, which is beneficial to heat dissipation, the conical grooves 42 are distributed at intervals to ensure the strength of the cold material pipe 41, the rear end of the cold material pipe 41 is fixedly connected with the small end of the connecting pipe 12, and the front end is fixedly connected with the large end of the sealing port 3.

[0032] The protection part 2 comprises a protection shell 21, a plurality of heat dissipation holes 22, a support ring 23 and a plurality of support columns 24, the rear end of the protection shell 21 is fixedly connected with the front end of the feeding pipe 11.

[0033] The heat dissipation holes 22 are all arranged on the protection shell 21, so that the heat of the cold material pipe 41 is discharged through the heat dissipation holes 22, and the heat dissipation effect is further enhanced, the support ring 23 is fixedly arranged on the inner side of the front end of the protection shell 21 and is fixedly connected with the outer ring of the sealing material port 3, so that the connection strength of the sealing material port 3 and the protection shell 21 is increased, the support columns 24 are all fixedly arranged on the inner ring of the protection shell 21 in a spiral shape, the spiral direction of the support columns 24 is consistent with the spiral direction of the cold material pipe 41, the inner ends of the support columns 24 are all fixedly connected with the outer ring of the cold material pipe 41, so that the cold material pipe 41 is supported in the protection shell 21 and does not contact the protection shell 21, and the heat dissipation of the cold material pipe 41 is more beneficial.

[0034] The outer end of the feeding pipe 11 is connected with the discharge port of the injection molding machine, the outer end of the sealing material port 3 is connected with the feeding port of the mold, the injection molding machine is started, the injection molding machine injects the molten plastic into the feeding pipe 11, then the molten plastic flows into the cold material pipe 41 from the connecting pipe 12 and then flows into the mold through the sealing material port 3, when the mold is filled with the molten plastic, the injection molding machine is closed, the injection of the molten plastic is stopped, the mold is pressure-maintained and cooled, the spiral cold material pipe 41 prolongs the flow length of the molten plastic and dissipates the excess heat, the temperature of the molten plastic is reduced after reaching the sealing material port 3, the molten plastic is first cooled and solidified to form a physical isolation barrier, so that the molten plastic in the cold material pipe 41 and the feeding pipe 11 is separated from the feeding port of the mold, and the molten plastic is prevented from flowing out from the gap between the feeding port and the sealing material port 3 when the mold is opened.

[0035] The above is only a preferred embodiment of the present application, and does not limit the present application in any form, although the present application has been disclosed as above with a preferred embodiment, however, it is not intended to limit the present application, any person skilled in the art, without departing from the technical solution range of the present application, can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, but as long as it does not deviate from the technical solution content of the present application, any modification, equivalent change and modification of the above embodiment according to the technical essence of the present application, all still belong to the range of the technical solution of the present application.

Claims

1. An open hot nozzle with automatic glue sealing function, characterized in that, The utility model relates to a kind of plastic melt protection device, including: Feed part (1), which is connected with injection molding machine, is used to receive the melt plastic extruded by injection molding machine; Cold material part (4) is fixedly arranged at the outer end of feed part (1), used to receive the melt plastic flowed out of feed part (1), and cool the melt plastic; Protection part (2) is fixedly connected with feed part (1) at one end and sealing material port (3) at the other end, and is fixedly arranged at the outer circle of cold material part (4) to protect cold material part (4); Sealing material port (3) is fixedly arranged at one end of cold material part (4), and the melt plastic in cold material part (4) is introduced into the mold, when the mold is pressure-cooled, the plastic in cold material part (4) is cooled and solidified, and the melt plastic is sealed in cold material part (4).

2. The open hot nozzle with automatic glue sealing function according to claim 1, characterized in that, The feed part (1) includes a feed pipe (11) and a connecting pipe (12), the connecting pipe (12) is in the shape of a hollow circular truncated cone, the large end of the connecting pipe (12) is fixedly connected with the front end of the feed pipe (11), and the small end is fixedly connected with the rear end of the cold material part (4).

3. The open hot nozzle with automatic glue sealing function according to claim 2, characterized in that, The sealing material port (3) is in the shape of a circular truncated cone, the large end of the sealing material port (3) is fixedly connected with the front end of the cold material part (4), and the small end is connected with the mold inlet.

4. The open hot nozzle with automatic glue sealing function according to claim 3, characterized in that, The cold material part (4) includes a cold material pipe (41) and a plurality of tapered grooves (42), the cold material pipe (41) is in the shape of a spiral, the tapered grooves (42) are all arranged at the outer circle of the cold material pipe (41), the rear end of the cold material pipe (41) is fixedly connected with the small end of the connecting pipe (12), and the front end is fixedly connected with the large end of the sealing material port (3).

5. The open hot nozzle with automatic glue sealing function according to claim 4, characterized in that, The protection part (2) includes a protection shell (21), a plurality of heat dissipation holes (22), a support ring (23) and a plurality of support columns (24), the rear end of the protection shell (21) is fixedly connected with the front end of the feed pipe (11).

6. The open hot nozzle with automatic glue sealing function according to claim 5, characterized in that, The heat dissipation holes (22) are all arranged through the protection shell (21), the support ring (23) is fixedly arranged at the inner side of the front end of the protection shell (21) and fixedly connected with the outer circle of the sealing material port (3), the support columns (24) are all fixedly arranged at the inner circle of the protection shell (21) in the shape of a spiral, the spiral direction of the support columns (24) is consistent with the spiral direction of the cold material pipe (41), and the inner ends of the support columns (24) are all fixedly connected with the outer circle of the cold material pipe (41).

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