CN217346445U - Hot runner injection mold - Google Patents

Abstract

The utility model relates to a hot runner injection mold, including the base, be provided with hot flow channel subassembly in the base, hot flow channel subassembly includes hot mouth and the circle that generates heat of setting in the hot mouth outside, and hot mouth is used for making the material of moulding plastics pass through, and the circle that generates heat is used for making the material melting of moulding plastics in the hot mouth, and the outside of the circle that generates heat is provided with the cooling trough, is provided with the apron that is used for sealing the notch of cooling trough on the cooling trough, and one side that the cooling trough is close to the circle that generates heat is provided with the inner seal circle, still is provided with the protection sealing washer between inner seal circle and the circle that generates heat, apron and inner seal circle and protection sealing washer all compress tightly, be provided with first sensor that leaks between inner seal circle and the protection sealing washer. Use the utility model discloses a hot runner injection mold, when the sealing washer that cooling trough is close to heating ring one side unexpected damage appears, can protect the heating ring to avoid the short circuit that leaks, and send out the police dispatch newspaper and remind the staff in time to maintain.

Description

Hot runner injection mold

Technical Field

The utility model relates to an injection moulding equipment's technical field more exactly relates to a hot runner injection mold.

Background

In the prior art, an injection mold is generally provided with a hot runner, a heating ring is arranged in the hot runner and used for melting plastic materials, and the molten plastic materials pass through a glue outlet and are injected into a mold cavity of the mold under the action of an injection molding machine. And a piston and a hot nozzle needle valve are arranged in the hot runner, the hot nozzle needle valve is used for blocking the glue outlet, and the piston is used for driving the hot nozzle needle valve to act and controlling the opening and closing of the glue outlet.

Because the hot runner is installed inside the mold core or the mold cavity, the heat dissipation is not smooth, the actual temperature in the hot runner is often higher than the design temperature, and the plastic material can be carbonized at high temperature, thereby seriously affecting the quality of the product. To this problem, the commonly-used solution of industry is, sets up the cooling trough around the hot runner, cools off the temperature of adjusting the hot runner through flowing water, and the both sides of cooling trough all can set up the sealing washer, and the notch of cooling trough then can set up the apron, and the sealing washer that compresses tightly the cooling trough both sides through the apron makes the cooling trough externally isolated, avoids the water in the cooling trough to spill on the heating coil and lead to the heating coil short circuit. However, when the sealing ring on the side of the cooling water tank close to the heating ring is damaged accidentally, water in the cooling water tank inevitably leaks to the heating ring, so that the heating ring is short-circuited, and the whole injection mold equipment can also work continuously.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a hot runner injection mold, when the sealing washer that cooling trough is close to heating ring one side unexpected damage appears, can protect the heating ring to avoid the short circuit that leaks to send out the police dispatch newspaper and remind staff in time to maintain.

The technical solution of the utility model is, a hot runner injection mold is provided, which comprises a base, be provided with hot flow channel subassembly in the base, hot flow channel subassembly includes hot mouth and the circle that generates heat of setting in the hot mouth outside, hot mouth is used for making the material of moulding plastics to pass through, the circle that generates heat is used for making the material melting of moulding plastics in the hot mouth, the outside of the circle that generates heat is provided with the cooling trough, be provided with the apron that is used for sealing the notch of cooling trough on the cooling trough, one side that the cooling trough is close to the circle that generates heat is provided with the inner seal circle, still be provided with the protection sealing washer between inner seal circle and the circle that generates heat, apron and inner seal circle and protection sealing washer all compress tightly, be provided with first sensor that leaks between inner seal circle and the protection sealing washer.

Compared with the prior art, the utility model discloses a hot runner injection mould has following advantage: the cover plate, the inner sealing ring and the protective sealing ring are all tightly pressed, so that water in the cooling water tank cannot leak out of the inner sealing ring, when the inner sealing ring is accidentally damaged, the water in the cooling water tank leaks out of the inner sealing ring but cannot leak out of the protective sealing ring and flows onto the heating ring, and the heating ring is protected from water leakage and short circuit, so that the hot runner injection mold can still continue to work, and the first water leakage sensor positioned between the inner sealing ring and the protective sealing ring can detect water leakage between the inner sealing ring and the protective sealing ring and externally transmit a signal to remind a worker of timely maintenance; the staff is in the maintenance the utility model discloses a during hot runner injection mold, because it is remaining to generate heat the material of moulding plastics in the circle can the normal work melting hot mouth, make the utility model discloses a hot runner injection mold can not solidify and be difficult to dismantle because the remaining cooling of the material of moulding plastics in the hot mouth, convenient maintenance operation.

Preferably, the cooling water tank comprises a first water tank located on the upper end face of the base, the inner sealing ring, the first water leakage sensor and the protection sealing ring are located on the upper end face of the base, the cover plate is an upper base cover plate arranged on the upper end face of the base and used for sealing a notch of the first water tank, and the upper base cover plate is pressed against the inner sealing ring and the protection sealing ring. By adopting the structure, the first water tank is processed on the upper end surface of the base, the structure is simple, and the manufacture is convenient.

Preferably, the cooling water tank comprises a second water tank located on the lower end face of the base, the inner sealing ring, the first water leakage sensor and the protection sealing ring are located on the lower end face of the base, the cover plate is a lower base cover plate arranged on the lower end face of the base and used for sealing a notch of the second water tank, and the lower base cover plate is pressed against the inner sealing ring and the protection sealing ring. By adopting the structure, the second water tank is processed on the lower end surface of the base, the structure is simple, and the manufacture is convenient.

Preferably, the cooling water tank further comprises a second water tank located on the lower end face of the base, the lower end face of the base is provided with a lower base cover plate used for closing a notch of the second water tank, and the base is provided with a water inlet valve communicated with the first water tank, a water outlet valve communicated with the second water tank and a water tank communication hole used for communicating the first water tank and the second water tank. By adopting the structure, the first water tank is processed on the upper end surface of the base, the second water tank is processed on the lower end surface of the base, the first water tank is communicated with the second water tank, the structure is simple, the manufacture is convenient, water flow is injected from the water inlet valve, flows through the first water tank, the water tank communicating hole and the second water tank in sequence and then flows out from the water outlet valve, the upper part and the lower part of the heating ring can be cooled simultaneously, and the temperature on the upper part and the lower part of the heating ring is uniform.

Preferably, one side of the cooling water tank, which is far away from the heating ring, is provided with an outer sealing ring, and the cover plate and the outer sealing ring are also tightly pressed. By adopting the structure, water in the cooling water tank cannot leak out of the outer sealing ring, and the cooling water can only flow along the cooling water tank.

Preferably, a cylinder is arranged in the base, a piston is arranged in the cylinder, an air valve communicated with the cylinder is further arranged on the base, the air valve is used for being externally connected with the air pump and driving the piston to move in the cylinder, a hot nozzle needle valve is arranged in the hot nozzle, the piston is connected with the hot nozzle needle valve and drives the hot nozzle needle valve to act, the hot nozzle needle valve can open and close a glue outlet of the hot nozzle, and a second water leakage sensor is arranged in the cylinder. Adopt this structure, be provided with the second sensor that leaks in the cylinder, when pneumatic valve and water pump misconnection, the second sensor that leaks can in time detect leaking in the cylinder and outwards transmitting signal, reminds the staff in time to handle, gets rid of the hidden danger because leak and lead to the short circuit before making the heating coil circular telegram.

Preferably, the air valves include a first air valve and a second air valve, the first air valve is communicated with the cylinder space on the upper side of the piston and used for driving the piston to move downwards, and the second air valve is communicated with the cylinder space on the lower side of the piston and used for driving the piston to move upwards. By adopting the structure, the structure is simple, and the piston can be conveniently controlled to move up and down in the cylinder.

Preferably, the cylinder is located between the heating ring and the base, the piston sleeve is arranged on the outer side of the heating ring, the hot flow channel assembly is formed by connecting an upper mold core and a lower mold core in a vertical matching mode, the hot nozzle penetrates through the upper mold core and the lower mold core, corresponding avoidance grooves are formed in the lower ends of the heating ring and the upper mold core, a needle valve driving structure used for being connected with a needle valve of the hot nozzle is arranged on the piston, and the needle valve driving structure is located in the avoidance grooves and can move up and down along the groove walls of the avoidance grooves. Adopt this structure, it is convenient the utility model discloses a hot runner injection mold's assembly.

Preferably, the upper mold core is provided with a glue inlet of the hot nozzle, the upper mold core is internally provided with at least one shunt tube communicated with the glue inlet, the shunt tube avoids the avoiding groove, the lower mold core is internally provided with a needle valve motion cavity communicated with the avoiding groove and a glue outlet communicated with the shunt tube, the needle valve motion cavity is communicated with the glue outlet, one end of the hot nozzle needle valve penetrates through the needle valve motion cavity to be connected with the needle valve driving structure, and the other end of the hot nozzle needle valve is opposite to the glue outlet. By adopting the structure, the shunt pipe avoids the position of the avoiding groove, and prevents the molten injection molding material from entering the avoiding groove to obstruct the movement of the piston.

Preferably, the upper end of the hot nozzle needle valve is provided with a limiting groove, a limiting lug is arranged in the needle valve driving structure, and the limiting lug is matched and limited in the limiting groove to enable the piston to be connected with the hot nozzle needle valve. By adopting the structure, the piston is conveniently connected with the hot nozzle needle valve.

Drawings

Fig. 1 is a schematic structural view of the hot runner injection mold of the present invention.

Fig. 2 is a right side view of fig. 1.

Fig. 3 is an exploded view of fig. 1.

Fig. 4 is a sectional view taken along the line a-a of fig. 2.

Fig. 5 is a sectional view taken along the direction C-C of fig. 2.

Fig. 6 is a sectional view taken along line B-B of fig. 2.

Fig. 7 is a sectional view taken along the direction G-G of fig. 6.

Fig. 8 is a sectional view taken along the direction D-D of fig. 6.

Fig. 9 is a sectional view taken along the direction E-E of fig. 6.

Fig. 10 is a sectional view taken along the direction F-F of fig. 8.

As shown in the figure: 1. the device comprises a base, 1-1, an upper base, 1-2, a lower base, 1-3, a water inlet valve, 1-4, a water outlet valve, 1-5, a first water tank, 1-6, a second water tank, 1-7, a water tank communicating hole, 1-8, a first air valve, 1-9, a second air valve, 1-10, a cylinder, 2, a hot flow channel assembly, 2-1, an upper mold core, 2-11, a position avoiding groove, 2-2, a lower mold core, 2-3, a glue inlet, 2-4, a shunt pipe, 2-5, a glue outlet, 2-6, a piston motion cavity, 2-7, a needle valve motion cavity, 3, a piston, 3-1, a needle valve driving structure, 3-11, a limit bump, 4, a hot nozzle needle valve, 4-1, a limit groove, 5, a heating ring, 6, The device comprises an outer sealing ring, 7, an inner sealing ring, 8, a first water leakage sensor, 9, a protective sealing ring, 10, a second water leakage sensor, 11, an upper base cover plate, 12 and a lower base cover plate.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification.

In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Further, when a statement such as "… at least one" appears after the list of listed features, the entire listed feature is modified rather than modifying individual elements in the list.

As shown in fig. 1 to 4, the hot runner injection mold of the present invention includes a base 1, a hot runner channel assembly 2, a piston 3 and a hot nozzle needle valve 4, wherein the base 1 is formed by connecting an upper base 1-1 and a lower base 1-2 in a vertically fitting manner, an upper base cover plate 11 is disposed on an upper end surface of the upper base 1-1, and a lower base cover plate 12 is disposed on a lower end surface of the lower base 1-2; the hot flow channel assembly 2 is arranged in the base 1, the hot flow channel assembly 2 is formed by connecting an upper mold core 2-1 and a lower mold core 2-2 in a vertically matched manner, hot nozzles are arranged in the upper mold core 2-1 and the lower mold core 2-2, a glue inlet 2-3 is arranged on the upper end face of the upper mold core 2-1, two shunt pipes 2-4 communicated with the glue inlet 2-3 are arranged in the upper mold core 2-1, a glue outlet 2-5 communicated with the two shunt pipes 2-4 is arranged at the lower end of the lower mold core 2-2, and the hot nozzles penetrate through the upper mold core 2-1 and the lower mold core 2-2 and comprise the glue inlet 2-3, the shunt pipes 2-4 and the glue outlet 2-5; the outer sides of the upper mold core 2-1 and the lower mold core 2-2 are provided with heating rings 5, the heating rings 5 are opposite to the two shunt pipes 2-4, the heating rings 5 are used for melting injection molding materials in the hot nozzle, and the molten injection molding materials can smoothly pass through the hot nozzle; a cylinder 1-10 is arranged between the heating ring 5 and the base 1, a piston 3 is arranged in the cylinder 1-10, the piston 3 is sleeved outside the heating ring 5, a needle valve driving structure 3-1 is arranged in the middle of the piston 3, corresponding avoiding grooves 2-11 are arranged at the lower ends of the heating ring 5 and the upper mold core 2-1, the avoiding grooves 2-11 are positioned between the two shunt tubes 2-4, the shunt tubes 2-4 avoid the avoiding grooves 2-11, the needle valve driving structure 3-1 is positioned in the avoiding grooves 2-11, and a piston motion cavity 2-6 for the needle valve driving structure 3-1 to move up and down along the groove walls of the avoiding grooves 2-11 is formed in the avoiding grooves 2-11; the upper part of the lower mold core 2-2 is provided with a needle valve motion cavity 2-7, the upper end and the lower end of the needle valve motion cavity 2-7 are respectively opposite to and communicated with a clearance groove 2-11 and a glue outlet 2-5, a hot nozzle needle valve 4 for opening and closing the glue outlet 2-5 is arranged in the needle valve motion cavity 2-7, one end of the hot nozzle needle valve 4 penetrates through the needle valve motion cavity 2-7 to be connected with a needle valve driving structure 3-1 in the clearance groove 2-11, the upper end of the hot nozzle needle valve 4 is provided with a limiting groove 4-1, a limiting lug 3-11 is arranged in the needle valve driving structure 3-1, the limiting lug 3-11 is matched and limited in the limiting groove 4-1 to enable the needle valve driving structure 3-1 to be connected with the hot nozzle needle valve 4, and the other end of the hot nozzle needle valve 4 is opposite to the glue outlet 2-5.

As shown in fig. 5, a first air valve 1-8 is arranged on an upper base 1-1, the first air valve 1-8 is communicated with a space of an air cylinder 1-10 at the upper side of a piston 3, a second air valve 1-9 is arranged on a lower base 1-2, the second air valve 1-9 is communicated with a space of an air cylinder 1-10 at the lower side of the piston 3, and the first air valve 1-8 and the second air valve 1-9 are both externally connected with an air pump. When the pressure of the gas introduced by the first gas valve 1-8 is greater than that of the gas introduced by the second gas valve 1-9, the piston 3 is driven to move downwards, so that the needle valve driving structure 3-1 moves downwards in the piston moving cavity 2-6 and drives the hot nozzle needle valve 4 to move downwards along the needle valve moving cavity 2-7 to close the glue outlet 2-5; when the pressure of the gas introduced by the first gas valve 1-8 is smaller than that of the gas introduced by the second gas valve 1-9, the piston 3 is driven to move upwards, so that the needle valve driving structure 3-1 moves upwards in the piston moving cavity 2-6 and drives the hot nozzle needle valve 4 to move upwards along the needle valve moving cavity 2-7 to open the glue outlet 2-5. The second water leakage sensor 10 is arranged in the air cylinder 1-10, when the first air valve 1-8 or the second air valve 1-9 is connected to the water pump or the water pipe by mistake, the second water leakage sensor 10 can detect water leakage in the air cylinder 1-10 in time and send out signals to remind workers to process the water leakage in time, and therefore the hidden trouble of short circuit caused by water leakage can be eliminated in time before the heating ring 5 is electrified.

As shown in fig. 6 to 10, a cooling water tank is provided on the base 1 outside the heating coil 5, the cooling water tank includes a first water tank 1-5 provided on the upper end surface of the upper base 1-1 and a second water tank 1-6 provided on the lower end surface of the lower base 1-2, an upper base cover plate 11 closes the notch of the first water tank 1-5, and a lower base cover plate 12 closes the notch of the second water tank 1-6. An inner sealing ring 7 is arranged on the inner side, close to the heating ring 5, of the first water tank 1-5, an outer sealing ring 6 is arranged on the outer side, far away from the heating ring, of the first water tank, a protection sealing ring 9 is further arranged between the inner sealing ring 7 and the heating ring 5, a first water leakage sensor 8 is arranged between the inner sealing ring 7 and the protection sealing ring 9, and the upper base cover plate 11 is tightly pressed with the outer sealing ring 6, the inner sealing ring 7 and the protection sealing ring 9. The inner side and the outer side of the second water tank 1-6 are also provided with sealing rings, and the lower base cover plate 12 is tightly pressed with the sealing rings on the inner side and the outer side of the second water tank 1-6. The upper base 1-1 is provided with a water inlet valve 1-3 communicated with the first water tank 1-5, the lower base 1-2 is provided with a water outlet valve 1-4 communicated with the second water tank 1-6, and the upper base 1-1 and the lower base 1-2 are provided with water tank communicating holes 1-7 used for communicating the first water tank 1-5 and the second water tank 1-6.

When the inner sealing ring 7 is accidentally damaged, water in the first water tank 1-5 leaks out of the inner sealing ring 7, but cannot leak out of the protective sealing ring 9 and flow onto the heating ring 5, the heating ring 5 is protected from water leakage and short circuit, the heating ring 5 can also continuously work to melt the injection molding material residue in the hot nozzle, and the first water leakage sensor 8 can detect water leakage between the inner sealing ring 7 and the protective sealing ring 9 and externally emit a signal to remind a worker of timely maintenance; when the staff was in the maintenance, because it is remaining to generate heat the material of moulding plastics in 5 ability normal work melting hot mouths of circle, the material of moulding plastics in the hot mouth is remaining can not the cooling solidification and makes the utility model discloses a hot runner injection mold is difficult to dismantle, convenient maintenance operation.

The above are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention; the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and equivalent arrangements as is within the spirit and scope of the present invention.

Claims (10)

1. A hot runner injection mold comprises a base (1), a hot runner channel component (2) is arranged in the base (1), the hot runner channel component (2) comprises a hot nozzle and a heating ring (5) arranged on the outer side of the hot nozzle, the hot nozzle is used for enabling injection molding materials to pass through, the heating ring (5) is used for melting the injection molding materials in the hot nozzle, a cooling water tank is arranged on the outer side of the heating ring (5), a cover plate used for sealing the notch of the cooling water tank is arranged on the cooling water tank, it is characterized in that one side of the cooling water tank close to the heating ring is provided with an inner sealing ring (7), a protective sealing ring (9) is arranged between the inner sealing ring (7) and the heating ring (5), the cover plate, the inner sealing ring (7) and the protective sealing ring (9) are all tightly pressed, and a first water leakage sensor (8) is arranged between the inner sealing ring (7) and the protective sealing ring (9).

2. The hot runner injection mold according to claim 1, wherein the cooling water channel comprises a first water channel (1-5) located on the upper end surface of the base (1), the inner sealing ring (7), the first water leakage sensor (8) and the protection sealing ring (9) are all located on the upper end surface of the base (1), the cover plate is an upper base cover plate (11) arranged on the upper end surface of the base (1) and used for closing the notch of the first water channel (1-5), and the upper base cover plate (11) is compressed with the inner sealing ring (7) and the protection sealing ring (9).

3. The hot runner injection mold according to claim 1, wherein the cooling water channel comprises a second water channel (1-6) located on the lower end surface of the base (1), the inner sealing ring (7), the first water leakage sensor (8) and the protection sealing ring (9) are all located on the lower end surface of the base (1), the cover plate is a lower base cover plate (12) arranged on the lower end surface of the base (1) and used for closing the notch of the second water channel (1-6), and the lower base cover plate (12) is compressed with the inner sealing ring (7) and the protection sealing ring (9).

4. The hot runner injection mold according to claim 2, wherein the cooling water tank further comprises a second water tank (1-6) located on the lower end surface of the base (1), the lower end surface of the base (1) is provided with a lower base cover plate (12) for closing the notch of the second water tank (1-6), the base (1) is provided with a water inlet valve (1-3) communicated with the first water tank (1-5), a water outlet valve (1-4) communicated with the second water tank (1-6), and a water tank communication hole (1-7) for communicating the first water tank (1-5) and the second water tank (1-6).

5. The hot runner injection mold as claimed in any one of claims 1 to 4, wherein the cooling water channel is provided with an outer sealing ring (6) on the side away from the heat-generating ring, and the cover plate and the outer sealing ring (6) are also pressed tightly.

6. The hot runner injection mold according to claim 1, wherein a cylinder (1-10) is arranged in the base (1), a piston (3) is arranged in the cylinder (1-10), an air valve communicated with the cylinder (1-10) is further arranged on the base (1), the air valve is used for being externally connected with an air pump and driving the piston (3) to move in the cylinder (1-10), a hot nozzle needle valve (4) is arranged in the hot nozzle, the piston (3) is connected with the hot nozzle needle valve (4) and drives the hot nozzle needle valve (4) to act, the hot nozzle needle valve (4) can open and close a glue outlet of the hot nozzle, and a second water leakage sensor (10) is arranged in the cylinder (1-10).

7. Hot runner injection mold according to claim 6, wherein the air valves comprise first air valves (1-8) and second air valves (1-9), the first air valves (1-8) are in spatial communication with the cylinders (1-10) on the upper side of the piston (3) and are used for driving the piston (3) to move downwards, and the second air valves (1-9) are in spatial communication with the cylinders (1-10) on the lower side of the piston (3) and are used for driving the piston (3) to move upwards.

8. The hot runner injection mold as claimed in claim 6, wherein the cylinder (1-10) is located between the heating ring (5) and the base (1), the piston (3) is sleeved outside the heating ring (5), the hot runner channel assembly (2) is formed by vertically and cooperatively connecting an upper core (2-1) and a lower core (2-2), the hot nozzle penetrates through the upper core (2-1) and the lower core (2-2), the lower ends of the heating ring (5) and the upper core (2-1) are provided with corresponding clearance grooves (2-11), the piston (3) is provided with a needle valve driving structure (3-1) for connecting the hot nozzle (4), and the needle valve driving structure (3-1) is located in the clearance grooves (2-11) and can move up and down along the groove walls of the clearance grooves (2-11).

9. The hot runner injection mold according to claim 8, wherein the upper core (2-1) is provided with a glue inlet (2-3) of a hot nozzle, the upper core (2-1) is provided with at least one shunt tube (2-4) communicated with the glue inlet (2-3), the shunt tube (2-4) avoids the avoiding groove (2-11), the lower core (2-2) is provided with a needle valve moving cavity (2-7) communicated with the avoiding groove (2-11), a glue outlet (2-5) communicated with the shunt pipe (2-4), a needle valve movement cavity (2-7) communicated with the glue outlet (2-5), one end of a hot nozzle needle valve (4) penetrates through the needle valve movement cavity (2-7) to be connected with the needle valve driving structure (3-1), and the other end of the hot nozzle needle valve is opposite to the glue outlet (2-5).

10. The hot runner injection mold according to claim 8, wherein the upper end of the hot nozzle needle valve (4) is provided with a limiting groove (4-1), the needle valve driving structure (3-1) is provided with a limiting bump (3-11), and the limiting bump (3-11) is matched and limited in the limiting groove (4-1) to connect the piston (3) and the hot nozzle needle valve (4).

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