CN113858550A

CN113858550A - Cooling spray pipe structure suitable for multi-cavity die

Info

Publication number: CN113858550A
Application number: CN202111061754.4A
Authority: CN
Inventors: 梁正华; 梁凯; 林连明; 王华良
Original assignee: Zhejiang Kaihua Mould Co Ltd
Current assignee: Zhejiang Kaihua Mould Co Ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2021-12-31
Also published as: WO2023035419A1

Abstract

The invention discloses a cooling spray pipe structure suitable for a multi-cavity die, which comprises a die and a spray pipe, wherein the die comprises a die core, the die core is internally provided with a die core cavity, the bottom of the spray pipe is connected with an insert, a mixing cavity is arranged in the insert, the mixing cavity is connected with a backflow channel, a spray pipe channel, a water outlet channel and a water inlet channel, the spray pipe channel is internally provided with a pressure relief valve, and the water outlet channel is provided with a temperature control valve. The insert has a compact structure, and the cooling spray pipe is conveniently and quickly installed through the insert; the mixing cavity is arranged, the temperature control valve is arranged in the water outlet channel, the pressure release valve is arranged in the spray pipe channel, the cooling liquid with lower temperature can be recycled, and the cooling efficiency of the cooling liquid is improved.

Description

Cooling spray pipe structure suitable for multi-cavity die

Technical Field

The invention relates to a cooling spray pipe structure, in particular to a cooling spray pipe structure suitable for a multi-cavity die.

Background

In the process of production by using an injection mold, cooling is an important step, and has an extremely important influence on the production efficiency, the yield and the like of products. For injection molding of small parts, such as medical treatment, bottle caps, food packaging and the like, a mold core structure is often needed in a mold, and the mold core structure is often small, so that a spray pipe is widely used for extending into a mold core opening to carry out spray cooling at present. In addition, a small part like a bottle cap is usually produced by adopting a multi-cavity die, so that the requirement on the demand of cooling liquid is high, and high-quality cooling liquid needs to be recycled, so that the improvement of the use efficiency of the cooling liquid has great significance on energy conservation and emission reduction.

Since the cooling nozzle needs to be installed in advance, for this reason, the existing nozzle cooling structure, for example, "nozzle dismounting structure and injection mold cooling system" disclosed in chinese patent literature, publication No. CN204036785U, includes a nozzle and a nozzle connecting insert having a middle through hole, the nozzle connecting insert has an installation through hole and a dismounting through hole having an internal thread, the installation through hole is located above the dismounting through hole, the internal diameter of the installation through hole is greater than that of the dismounting through hole, the bottom of the nozzle is fixedly installed in the installation through hole, the middle through hole of the nozzle is communicated with the installation through hole, the problem of difficulty in assembling is improved by providing the insert, the assembling efficiency is improved, and the cooling efficiency is not improved.

Disclosure of Invention

The invention aims to solve the problems that the existing spray pipe cooling device, in particular to a spray pipe cooling device applied to a multi-cavity mold, is troublesome to install and low in cooling efficiency, and provides a cooling spray pipe structure which is convenient to install and high in cooling efficiency.

The invention is realized by the following technical scheme: the utility model provides a cooling spray tube structure suitable for a mould multicavity mould, including mould and spray tube, the mould include mould benevolence, be equipped with the mould benevolence chamber that is used for installing the spray tube in the mould benevolence, the spray tube bottom is connected with inserts, the inside hybrid chamber that is provided with of inserting, it is used for communicateing hybrid chamber and mould benevolence chamber to insert to be provided with the backward flow passageway, the hybrid chamber upwards extends and forms the spray tube passageway, the hybrid chamber passes through spray tube passageway and spray tube intercommunication, be provided with the relief valve in the spray tube passageway, spray tube passageway lateral wall be provided with be higher than the relief valve and with the inlet channel who inserts outside intercommunication, the position that the hybrid chamber is close to the bottom is provided with and communicates the outside exhalant canal of inserting, the exhalant canal is provided with the temperature-sensing valve.

During installation, the spray pipe is installed on the insert, then the spray pipe is plugged into the die cavity, and installation can be completed by fixing the insert and the die; during the use, introduce the coolant liquid through inhalant canal, the coolant liquid spouts mould benevolence intracavity after getting into the spray tube through spray tube passageway, flow into the hybrid chamber through backflow channel, the coolant liquid in the hybrid chamber can gather in the hybrid chamber if the temperature is less than the temperature-sensing valve setting value, when water pressure is greater than the threshold value of relief valve, the relief valve is opened, the coolant liquid mixes with the coolant liquid in the inhalant canal and sprays together in will getting into the spray tube passageway, in this process, if the coolant liquid temperature is higher than the temperature-sensing valve setting value, then the temperature-sensing valve is opened, the coolant liquid flows from exhalant canal, it is that the water pressure in the hybrid chamber reduces, the relief valve is closed.

Preferably, the temperature control valve comprises a valve seat, the valve seat is arranged outside the water outlet channel, a thermal bulb is transversely arranged on one side of the valve seat, one end of the thermal bulb is connected with the valve seat through a spring, the other end of the thermal bulb is connected with a circular truncated cone-shaped valve, the water outlet channel is provided with a circular truncated cone-shaped valve port matched with the valve, when the temperature of the cooling liquid rises, the thermal bulb expands, the valve can be opened, and the cooling liquid can flow out from the valve port; when the temperature of the cooling liquid is reduced and the temperature bulb shrinks, the valve blocks the valve port again, so that the cooling liquid is accumulated in the mixing cavity.

Preferably, the water outlet channel is rotatably connected with a rotating shaft rod, a pull rope is arranged on one side, away from the valve seat, of the valve, the other end of the pull rope penetrates out of the side wall of the water outlet channel, the pull rope is wound on the rotating shaft rod, the pull rope can be pulled through the rotating shaft rod, and therefore the threshold value of the temperature control valve is adjusted through adjusting the initial position of the valve.

Preferably, the end part of the spray pipe is provided with a plurality of jacking pieces which are abutted in the die cavity, so that the spray pipe can be always positioned in the central position of the die cavity in the process of plugging the spray pipe into the die cavity, and the phenomenon that the cooling is uneven or the spray pipe is damaged due to the inclination of the spray pipe is avoided.

Preferably, the spray pipe is in threaded connection with the insert, and the insert is in threaded connection with the mold core, so that the installation is convenient and the sealing performance is improved.

Preferably, a sealing groove is formed in the surface, abutted to the bottom surface of the mold core, of the insert, so that the coolant is prevented from directly flowing out of the insert from the mold core cavity.

Preferably, the backflow channel and the water inlet channel are located at different circumferential positions of the insert, so that mutual interference between the backflow channel and the water inlet channel is avoided.

Preferably, the water inlet channel is positioned above the mixing cavity, and the water inlet channel directly penetrates through the insert without arranging a pipeline for the water inlet channel in the mixing cavity, so that the structural strength of the insert is improved.

Therefore, the invention has the following beneficial effects:

the insert has a compact structure, and the cooling spray pipe is conveniently and quickly installed through the insert; the mixing cavity is arranged, the temperature control valve is arranged in the water outlet channel, the pressure release valve is arranged in the spray pipe channel, the cooling liquid with lower temperature can be recycled, and the cooling efficiency of the cooling liquid is improved.

Drawings

FIG. 1 is a schematic cross-sectional view of a first embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view taken along the direction A-A of the first embodiment of the present invention;

FIG. 3 is an enlarged schematic view of portion B of FIG. 2;

FIG. 4 is a schematic illustration of the present invention in use in a one-mold, multi-cavity mold;

FIG. 5 is a perspective view of an insert and nozzle according to a first embodiment of the present invention.

In the figure: the device comprises a spray pipe 1, a top connecting plate 11, a mold core 2, a mold core cavity 21, an insert 3, a mixing cavity 31, a backflow channel 32, a spray pipe channel 33, a pressure release valve 331, a water inlet channel 34, a water outlet channel 35, a sealing groove 36, a temperature control valve 4, a valve seat 41, a temperature control bag 42, a valve 43, a valve port 44, a rotating shaft rod 5 and a pull rope 6.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In a first embodiment, as shown in fig. 1, fig. 2, fig. 3 and fig. 5, a cooling nozzle structure suitable for a multi-cavity mold includes a mold and a nozzle 1, the mold includes a mold core 2, a mold core cavity 21 for installing the nozzle 1 is arranged in the mold core, an insert 3 is connected to the bottom of the nozzle 1, a mixing cavity 31 is arranged inside the insert 3, the insert 3 is provided with two backflow channels 32 for communicating the mixing cavity 31 with the mold core cavity 21, the mixing cavity 31 extends upwards to form a nozzle channel 33, the mixing cavity 31 is communicated with the nozzle 1 through the nozzle channel 33, a pressure relief valve 331 is arranged in the nozzle channel 33, a water inlet channel 34 higher than the pressure relief valve 331 and communicated with the outside of the insert 3 is arranged on the side wall of the nozzle channel 33, a water outlet channel 35 communicated with the outside of the insert is arranged at a position of the mixing cavity 31 close to the bottom, and a temperature control valve 4 is arranged on the water outlet channel.

As shown in fig. 3, the thermostat valve 4 includes a valve seat 41, the valve seat 41 is disposed outside the water outlet channel 35, a thermal bulb 42 is transversely disposed on one side of the valve seat 41, one end of the thermal bulb 42 is connected to the valve seat 41 through a spring, the other end of the thermal bulb is connected to a circular truncated cone-shaped valve 43, the water outlet channel 35 is provided with a circular truncated cone-shaped valve port 44 matched with the valve 43, when the temperature of the coolant rises and the thermal bulb 42 expands, the valve 43 can be opened, and the coolant can flow out from the valve port 44; when the temperature of the coolant decreases and the bulb 42 contracts, the valve 43 re-blocks the valve port 44, so that the coolant accumulates in the mixing chamber 31.

During the use, introduce the coolant liquid through inlet channel 34, the coolant liquid spouts in mould benevolence cavity 21 behind the spray tube entering spray tube through spray tube 1 passageway, flow into mixing chamber 31 through backward flow passageway 32, the coolant liquid in mixing chamber 31 can be gathered in mixing chamber 31 if the temperature is less than the 4 setting values of temperature-sensing valve, when water pressure is greater than the threshold value of relief valve 331, relief valve 331 opens, the coolant liquid will get into spray tube passageway 33 in with the coolant liquid in inlet channel 34 mix together and spray, in this process, if the coolant liquid temperature is higher than the 4 setting values of temperature-sensing valve, then the temperature-sensing valve opens, the coolant liquid flows out from outlet channel 35, the water pressure in mixing chamber 31 reduces, water pressure reduces below the threshold value, then relief valve 331 closes.

Go out the water passageway and go up to rotate and be connected with a rotatory axostylus axostyle, valve 43 is kept away from valve seat 41 one side and is provided with a stay cord 6, and the stay cord 6 other end is worn out from going out water passageway 35 lateral wall, and the winding is on rotatory axostylus axostyle 5, can pull stay cord 6 through rotatory axostylus axostyle 5 to adjust the threshold value of temperature-sensing valve 4 through the initial position of adjusting valve 43, promptly after turning left the pulling with valve 43, bulb 42 can keep valve 43 to close when lower temperature, also reduce the threshold value, otherwise the same reason. In addition, when a continuous rapid cooling is required, the valve 43 can be pulled to the left to the maximum to continuously discharge the cooling liquid.

Spray tube 1 and insert 3 pass through threaded connection, insert 3 and mould benevolence 2 pass through threaded connection, and 1 tip of spray tube is provided with two top connection pieces 11, and top connection piece butt is avoided leading to the damage of cooling inhomogeneous or spray tube because the slope of spray tube 1 in mould benevolence chamber 21, and top connection piece 11 area is less, avoids influencing the heat dissipation homogeneity.

During installation, the spray pipe 1 is installed on the insert 3, then the spray pipe 1 is plugged into the mold cavity 21, a sealing groove 36 is formed in the surface, abutted to the bottom surface of the mold core 2, of the insert 3, the jacking piece 11 can keep the spray pipe to be located in the center of the mold cavity all the time, finally, the insert and the mold core can be installed through threaded rotary connection, the damage of the spray pipe or the uneven cooling caused by the inclination of the spray pipe can be avoided in the process, the area of the jacking piece is small, the heat dissipation uniformity is influenced, the sealing performance is good, and the coolant is prevented from directly flowing out of the insert from the mold cavity.

The backflow channel and the water inlet channel are located at different circumferential positions of the insert, so that the mutual interference of the backflow channel 32 and the water inlet channel 34 is avoided. The water inlet channel 34 is positioned above the mixing chamber 21, and the water inlet channel 34 directly passes through the insert without arranging a pipeline for the water inlet channel 34 in the mixing chamber, so that the structural strength of the insert 2 is improved.

As shown in fig. 3, due to the high integration of the inserts 3, each insert 3 can be disposed in each insert of a multi-cavity mold, a product is disposed between each insert and the mold, each water inlet channel is connected through a water inlet pipeline, each water outlet channel is connected through a water outlet pipeline, the cooling liquid of the cooling spray pipe in each insert can be independently recycled, and the cooling efficiency is high.

In conclusion, the insert and the spray pipe, and the insert and the die core are connected through the threads, so that the installation is convenient; passing; the mixing cavity is arranged, the temperature control valve is arranged in the water outlet channel, the pressure release valve is arranged in the spray pipe channel, and the cooling liquid with lower temperature can be recycled, so that the cooling efficiency of the cooling liquid is improved; the setting of the temperature control valve is tensile, the threshold value of the temperature control valve can be adjusted, meanwhile, the quick cooling is carried out, the cooling mode is not recovered, and the adaptability is good.

Claims

1. The utility model provides a cooling spray tube structure suitable for a mould multicavity mould, including mould and spray tube, a serial communication port, the mould include mould benevolence, be equipped with the mould benevolence chamber that is used for installing the spray tube in the mould benevolence, the spray tube bottom is connected with inserts, the inside hybrid chamber that is provided with of inserting, it is used for communicateing hybrid chamber and mould benevolence chamber to insert to be provided with the backward flow passageway, the hybrid chamber upwards extends and forms the spray tube passageway, the hybrid chamber passes through spray tube passageway and spray tube intercommunication, be provided with the relief valve in the spray tube passageway, spray tube passageway lateral wall is provided with the inlet channel who is higher than the relief valve and with the outside intercommunication of inserting, the position that the hybrid chamber is close to the bottom is provided with and communicates the outside outlet channel of inserting, outlet channel is provided with the temperature control valve.

2. A cooling nozzle structure adapted for use in a multi-cavity mold in accordance with claim 1 wherein: the temperature control valve comprises a valve seat, the valve seat is arranged outside the water outlet channel, one side of the valve seat is transversely provided with a thermal bulb, one end of the thermal bulb is connected with the valve seat through a spring, the other end of the thermal bulb is connected with a round table-shaped valve, and the water outlet channel is provided with a round table-shaped valve port matched with the valve.

3. A cooling nozzle structure adapted for use in a multi-cavity mold in accordance with claim 2 wherein: go out the water passageway and go up to rotate and be connected with a rotatory axostylus axostyle, the valve is kept away from disk seat one side and is provided with a stay cord, and the stay cord other end is worn out from going out the water passageway lateral wall, twines on rotatory axostylus axostyle.

4. A cooling nozzle structure adapted for use in a multi-cavity mold according to claim 1, 2 or 3 wherein: the end part of the spray pipe is provided with a plurality of jacking pieces which are abutted against the die cavity.

5. A cooling nozzle structure adapted for use in a multi-cavity mold according to claim 1, 2 or 3 wherein: the spray pipe is connected with the insert through threads, and the insert is connected with the mold core through threads.

6. The cooling nozzle structure of claim 5 adapted for use in a multi-cavity mold, wherein: and a sealing groove is formed in the surface, abutted against the bottom surface of the mold core, of the insert.

7. A cooling nozzle structure adapted for use in a multi-cavity mold according to claim 1, 2 or 3 wherein: the backflow channel and the water inlet channel are located at different circumferential positions of the insert.

8. A cooling nozzle structure adapted for use in a multi-cavity mold according to claim 2, 3 or 4 wherein: the water inlet channel is positioned above the mixing cavity.