CN212826611U - One-outlet four-needle valve type cold runner die holder - Google Patents

Abstract

The utility model belongs to the technical field of die manufacturing, in particular to a four-pin valve type cold runner die holder, which comprises a die holder plate and a driving plate arranged on the die holder plate; the mold base plate is provided with at least one main runner, the mold base plate is also provided with an injection runner communicated with the first end of the main runner, the second end of the main runner extends to one end of the mold base plate far away from the drive plate, and the diameter of the second end of the main runner is gradually reduced to form a conical injection outlet; at least one driving mechanism is arranged in the driving plate, and the driving mechanism is arranged corresponding to the main runner; the main flow passage is coaxially provided with a valve needle, and the diameter of the valve needle is smaller than that of the main flow passage; the first end of the valve needle is connected with the driving mechanism, the second end of the valve needle is a sealing end, and the driving mechanism drives the sealing end to seal the injection port or remove the sealing injection port; when the glue sealing end of the valve needle is in sealing and abutting joint with the pouring outlet, the pouring outlet is in a closed state, and the liquid silica gel in the main flow channel cannot leak from the pouring outlet, so that the glue leakage phenomenon is prevented.

Description

One-outlet four-needle valve type cold runner die holder

Technical Field

The utility model belongs to the technical field of the mould is made, especially, relate to a go out four needle valve formula cold runner die holders.

Background

In the production process of liquid silica gel products, a solid-state compression molding manufacturing process is generally adopted for production, and the steps of firstly batching, cutting and weighing, then compression molding, and finally edge removing and secondary vulcanization molding are required. The liquid silica gel is converted from liquid to solid, and a die holder unit used for solid-state compression molding only heats the die, so that the liquid silica gel in the die reaches a certain temperature, and the liquid silica gel is solidified and shaped. In the processing technology of the liquid silica gel product, the liquid silica gel is injected into a mold cavity through an injection molding machine, and then the liquid silica gel is heated, cured and shaped in the mold cavity. However, because the liquid silica gel has strong fluidity, the liquid silica gel flows out from the flow channel in the process of opening the upper die base and the lower die base, the glue leakage phenomenon occurs, the environment is polluted, and meanwhile, the waste of the liquid silica gel is also caused, so that the processing cost is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a go out four needle valve formula cold runner die holders, aim at solving among the prior art because liquid silica gel's mobility is strong, at the in-process of upper die base and die holder die sinking, liquid silica gel flows out from the runner, the phenomenon of leaking out appears, and the polluted environment still causes liquid silica gel's waste simultaneously to increase the technical problem who adds the processing cost.

In order to achieve the above object, an embodiment of the present invention provides a four-pin valve type cold runner die holder, which includes a die holder plate and a driving plate disposed on the die holder plate; the mold base plate is provided with at least one main runner, the mold base plate is further provided with an injection runner communicated with a first end of the main runner, a second end of the main runner extends to one end, far away from the driving plate, of the mold base plate, and the diameter of the second end of the main runner is gradually reduced to form a conical injection port;

at least one driving mechanism is arranged in the driving plate, and the driving mechanism is arranged corresponding to the main runner; the main flow passage is coaxially provided with a valve needle, and the diameter of the valve needle is smaller than that of the main flow passage; the first end of the valve needle is connected with the driving mechanism, the second end of the valve needle is a glue sealing end, and the driving mechanism drives the glue sealing end to seal the injection port or unseal the injection port.

Optionally, the drive mechanism comprises a cylinder disposed within the drive plate; the piston is connected in the cylinder body in a sliding manner, and divides the interior of the cylinder body into an upper cavity and a lower cavity which are independent of each other; the driving plate is also provided with two air passages, one ends of the two air passages extend to the side wall of the driving plate, and the other ends of the two air passages are respectively communicated with the upper cavity and the lower cavity; the first end of the valve needle passes through the die base plate and the driving plate to be connected with the piston.

Optionally, a groove is dug in one end, away from the die base plate, of the driving plate, the cylinder body is installed in the groove, and a cover plate is hermetically covered on an opening of the groove, so that a sealed cavity is formed in the cylinder body.

Optionally, a connecting hole communicated with the cylinder is formed in one end, close to the die base plate, of the driving plate in a penetrating manner, and the first end of the valve needle passes through the connecting hole to be connected with the piston; the valve needle is provided with a valve needle sleeve in a sealing manner, and the valve needle sleeve covers the connecting hole in a sealing manner.

Optionally, the die holder plate comprises a heating plate, a heat insulation plate and a runner plate which are connected in sequence; the runner plate is connected with the driving plate; the injection runner is arranged on the runner plate, the first end of the main runner is arranged on the runner plate, the main runner extends to sequentially penetrate through the heat insulation plate and the heating plate, and the second end of the main runner extends to the end part of the heating plate.

Optionally, the die base plate further comprises a cold water nozzle and a nozzle; one end of the cold water nozzle is mounted on the runner plate, and the injection nozzle is mounted at the other end of the cold water nozzle; a clearance groove penetrates through the heat insulation plate and the heating plate, the cold water nozzle and the nozzle are accommodated in the clearance groove, a clearance cavity is formed between the cold water nozzle and the clearance groove, and the nozzle is hermetically connected with the clearance groove on the heating plate; the main runner penetrates through the cold water nozzle and the axis of the injection nozzle in sequence, and the injection outlet is formed in the injection nozzle.

Optionally, the runner plate is provided with a water inlet runner and a water outlet runner; one ends of the water inlet channel and the water outlet channel extend to the side wall of the runner plate, double-spiral water inlets and water outlets are formed in the cold water nozzle, and the other ends of the water inlet channel and the water outlet channel are communicated with the double-spiral water inlets and the double-spiral water outlets respectively.

Optionally, the mold base plate is provided with four main runners, and the four main runners are uniformly distributed with the mold base plate; the first end of the injection runner extends to the side wall of the mold base plate, and the second end of the injection runner is communicated with the first ends of the four main runners through the branch runners.

Optionally, the branch channel comprises a first branch channel and two second branch channels; the middle part of the first branch runner is communicated with the second end of the injection runner, two ends of the first branch runner are communicated with the middle parts of the two second branch runners, and the end parts of the two second branch runners are respectively communicated with the first end of the four main runners.

Optionally, the first end of the injection runner is connected with a glue inlet nozzle.

Compared with the prior art, the utility model discloses a go out four needle valve formula cold runner die holders and have one of following technological effect:

1. actuating mechanism can drive the needle and be in reciprocating sliding in the sprue, work as the sealed butt of the end of gluing of needle during the notes export, the notes export is in the closure state, liquid silica gel in the sprue can not be followed the notes export spills to prevent the phenomenon of leaking glue, simultaneously, avoid liquid silica gel extravagant, reduce the processing cost.

2. The heat insulating board blocks the heat of the heating plate from diffusing to the runner plate, and the runner plate can keep the temperature of the injection runner and the temperature of the main runner lower than the curing temperature of the liquid silica gel, so that the liquid silica gel in the material channel is prevented from being cured and blocking the material channel. And a cold water cavity is formed between the cold water nozzle and the cold water tank, and the cold water cavity cools the cold water nozzle to prevent the liquid silica gel in the main flow passage from solidifying to block the injection port.

3. Liquid silica gel is followed the injection runner gets into, warp the subchannel flows into four the sprue, then liquid silica gel follows again the notes export is poured into the mould die cavity respectively into, can form four products in injection moulding, improves production efficiency greatly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is an exploded schematic view of a four-pin valve type cold runner mold base according to the present invention.

Fig. 2 is a first cross-sectional view of the four-pin valve type cold runner mold base of the present invention.

Fig. 3 is an enlarged view of a portion a in fig. 2 according to the present invention.

Fig. 4 is a schematic view of the present invention showing a partial structure of a four-pin valve type cold runner mold base.

Fig. 5 is a second cross-sectional view of the four-pin valve type cold runner mold base of the present invention.

Fig. 6 is a third sectional view of the four-pin valve type cold runner mold base of the present invention.

Fig. 7 is a fourth cross-sectional view of the four-pin valve type cold runner mold base of the present invention.

Fig. 8 is an enlarged view of the point B in fig. 7 according to the present invention.

Fig. 9 is a fifth cross-sectional view of the four-pin valve type cold runner mold base of the present invention.

Fig. 10 is a sixth cross-sectional view of the four-pin valve type cold runner mold base of the present invention.

Wherein, in the figures, the respective reference numerals:

the mold comprises a mold base plate 100, a main runner 110, an injection outlet 111, an injection runner 120, a glue inlet nozzle 121, a sub-runner 130, a first sub-runner 131, a second sub-runner 132, a heating plate 200, a clearance groove 230, a clearance cavity 231, a heat insulation plate 300, a runner plate 400, a cold water nozzle 410, a nozzle 420, an O-shaped sealing ring 421, a water inlet runner 430, a water outlet runner 440, a cooling water channel 450, a driving plate 500, a connecting hole 501, a valve needle sleeve 502, a driving mechanism 510, a cylinder body 520, an upper chamber 521, a lower chamber 522, a groove 523, a cover plate 524, a piston 530, an air passage 540, a valve needle 700, a gap 701 and a glue sealing end 710.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary and intended to explain the embodiments of the present invention and are not to be construed as limiting the present invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

The utility model discloses in, refer to fig. 1 and 2, provide a go out four needle valve formula cold runner die holders, include die holder board 100 and locate drive plate 500 on the die holder board 100.

Referring to fig. 1, 2 and 3, the mold base plate 100 is provided with at least one main flow channel 110, and the main flow channel 110 is arranged in the same direction as the axis of the mold base plate 100. The mold base plate 100 is further provided with an injection runner 120 communicated with a first end of the sprue 110, a second end of the sprue 110 extends to an end of the mold base plate 100 away from the driving plate 500, and a second end of the sprue 110 is tapered in diameter to form a conical injection outlet 111. The mold base plate 100 is connected to a mold core plate (not shown) of the mold, and an injection machine (not shown) injects the liquid silicone rubber from the injection runner 120 and the main runner 110, and injects the liquid silicone rubber into the mold cavity from the injection port 111.

Referring to fig. 1, 2 and 3, at least one driving mechanism 510 is disposed in the driving plate 500, and the driving mechanism 510 is disposed corresponding to the primary flow channel 110. A valve needle 700 is coaxially disposed in the main flow channel 110, and the diameter of the valve needle 700 is smaller than that of the main flow channel 110, so that a gap 701 through which liquid silicone rubber passes is formed between the main flow channel 110 and the valve needle 700. The first end of the valve needle 700 is connected to the driving mechanism 510, the second end of the valve needle 700 is a sealing end 710, and the driving mechanism 510 drives the sealing end 710 to seal the injection outlet 111 or unseal the injection outlet 111.

When the mold is closed, the driving mechanism 510 drives the sealing end 710 to be away from the injection port 111, so as to contact and unseal the injection port 111, so that the injection port 111 is in an open state, and the feeding system injects the liquid silicone rubber from the injection runner 110 and the main runner 120 and injects the liquid silicone rubber from the injection port 111 into the mold cavity. After the cavity is filled with liquid silicone, the driving mechanism 510 drives the sealing end 710 to abut against the injection port 111 in a sealing manner, so that the injection port 111 is in a closed state. And simultaneously, heating the mold cavity to enable the liquid silica gel to be in a heat fixing type, and then opening the mold to take out a finished product. When the mold is opened, the sealing end 710 of the valve needle 700 is in sealing contact with the injection port 111, the injection port 111 is in a closed state, and the liquid silica gel in the main flow channel 110 cannot leak from the injection port 111, so that the phenomenon of gel leakage is prevented, meanwhile, the waste of the liquid silica gel is avoided, and the processing cost is reduced.

Referring to fig. 3, 5 and 6, the driving mechanism 510 includes a cylinder 520 disposed in the driving plate 500. A piston 530 is slidably connected in the cylinder 520, and the piston 530 divides the interior of the cylinder 520 into an upper chamber 521 and a lower chamber 522 which are independent of each other. The driving plate 500 is further provided with two air passages 540, one ends of the two air passages 540 extend to the side wall of the driving plate 500, and the other ends of the two air passages 540 are respectively communicated with the upper chamber 521 and the lower chamber 522. A first end of the valve pin 700 is connected to the piston 530 through the mold base plate 100 and the driving plate 500.

Specifically, referring to fig. 3, 5 and 6, one end of each of the air passages 540 is connected to a pneumatic valve (not shown) connected to an air pump (not shown) through an air pipe. When the feeding system performs a material injection action, the feeding system supplies an electric signal to the pneumatic valve through a computer, the air passage of the pneumatic valve is switched, air enters the air passage 540 positioned in the lower chamber 522, so that the air pressure of the lower chamber 522 is greater than the air pressure of the upper chamber 521, the piston 530 is driven to move towards one side of the upper chamber 521, and the piston 530 drives the sealing end 710 of the valve needle 700 to open the injection port 111. After the injection action is completed, the pneumatic valve loses the electric signal, the air passage of the pneumatic valve is switched, the air passage 540 positioned in the upper chamber 521 admits air, the piston 530 is driven to move towards one side of the lower chamber 522, and therefore the piston 530 drives the glue sealing end 710 of the valve needle 700 to seal the injection port 111, and the injection port 111 is closed. Wherein, the pneumatic valve can be used for switching the air inlet position of high-pressure air according to an electric signal provided by a feeding system computer.

Further, referring to fig. 2, 3 and 4, a groove 523 is dug at one end of the driving plate 500 away from the die base plate, the cylinder body 520 is installed in the groove 523, and an opening of the groove 523 is hermetically covered with a cover plate 524, so that a sealed cavity is formed in the cylinder body 520. The cover plate 524 seals the opening of the groove 523 through a sealing ring, so that gas in the upper chamber 521 is prevented from leaking from the cover plate 524, meanwhile, the cover plate 524 is detachably fixed on the driving plate 500 through screws, and the cover plate 524 is in the detachable structure, so that the memory piston 530 of the cylinder 520 is conveniently mounted.

Further, referring to fig. 2, 3 and 4, a connection hole 501 communicating with the cylinder 520 is formed through one end of the driving plate 500 close to the mold base plate 100, and a first end of the valve needle 700 is connected to the piston 530 through the connection hole 501. A valve needle sleeve 502 is hermetically sealed on the valve needle 700, and the valve needle sleeve 502 hermetically covers the connecting hole 501, so that gas in the lower chamber 522 is prevented from leaking from the connecting hole 501, and the normal operation of the driving mechanism 510 is ensured.

Referring to fig. 1, 2 and 3, the mold base plate 100 includes a heating plate 200, a heat insulation plate 300 and a runner plate 400, which are connected in sequence. The runner plate 400 and the drive plate 500 are connected, the heating plate 200, the heat insulation plate 300, the runner plate 400 and the drive plate 500 are sequentially stacked, and the heating plate 200, the heat insulation plate 300, the runner plate 400 and the drive plate 500 are fixedly connected through a plurality of bolts, so that the installation is convenient.

Further, referring to fig. 7, 8 and 9, the injection runner 120 is disposed on the runner plate 400, the first end of the main runner 110 is disposed on the runner plate 400, the main runner 110 extends to sequentially pass through the insulation plate 300 and the heating plate 200, and the second end of the main runner 110 extends to the end of the heating plate 200. The heating plate 200 is used for heating the mold cavity so as to solidify and shape the liquid silica gel in the mold cavity. Meanwhile, the heat of the heating plate 200 is blocked by the heat insulating plate 300 to be diffused to the runner plate 400, and the runner plate 400 can keep the temperature of the injection runner 120 and the temperature of the main runner 110 lower than the curing temperature of the liquid silica gel, thereby preventing the liquid silica gel in the material channel from being cured and blocking the material channel.

Further, referring to fig. 7, 8 and 9, the die set plate 100 further includes a cold water nozzle 410 and a nozzle 420. One end of the cold water tap 410 is installed at the runner plate 400, and the injection nozzle 420 is installed at the other end of the cold water tap 410. An empty avoiding groove 230 is formed in the heat insulation plate 300 and the heating plate 200 in a penetrating manner, the cold water nozzle 410 and the injection nozzle 420 are accommodated in the empty avoiding groove 230, an empty avoiding cavity 231 is formed between the cold water nozzle 410 and the empty avoiding groove 230 to separate the cold water nozzle 410 from the heating plate 200, and heat transfer is reduced. The nozzle 420 is hermetically connected to the empty-avoiding groove 230 of the heating plate 200 by an O-ring 421. The main flow passage 110 sequentially penetrates the axes of the cold water nozzle 410 and the injection nozzle 420, and the injection port 111 is disposed in the injection nozzle 420. Cooling system 210 is equipped with double helix formula inlet outlet (not shown) in cold water tap 410 is inside, double helix formula inlet outlet with keep away cavity 231 intercommunication, get into the cooling water through double helix formula inlet outlet and cool off cold water tap 410 prevents to be located the solidification of liquid silica gel in sprue 110 blocks up notes export 111.

Further, referring to fig. 7, 8 and 9, the runner plate 400 is provided with a water inlet runner 430 and a water outlet runner 440. One end of each of the water inlet channel 430 and the water outlet channel 440 extends to the side wall of the channel plate 400 and is connected with a cooling water circulation tank (not shown), and the other end of each of the water inlet channel 430 and the water outlet channel 440 is communicated with the double-spiral water inlet and outlet. The cooling water in the cooling water circulation tank flows into the cold water nozzle 410 from the water inlet flow channel 430 to cool the cold water nozzle, and the cooled water flows back to the cooling water circulation tank from the water outlet flow channel 440 to form a circulation. Wherein, the cooling water circulation tank is mature prior art.

Referring to fig. 1, the mold base plate 100 is provided with four main runners 110, and the four main runners 110 are uniformly distributed on the mold base plate 100. Correspondingly, four driving mechanisms 510 are provided, and four cold water nozzles 410 and four injection nozzles 420 are also provided. Each of the cold water taps 410 is provided with a set of the water inlet channel 430 and the water outlet channel 440. A first end of the injection runner 120 extends to a sidewall of the runner plate 400 of the mold base plate 100, and a second end of the injection runner 120 is communicated with first ends of the four main runners 110 through a branch runner 130. Liquid silica gel enters from the injection runner 120, flows into four through the sub-runners 130 and flows into the main runner 110, then the liquid silica gel is injected into the mold cavity from the injection port 111 respectively, four products can be formed in one-time injection molding, and the production efficiency is greatly improved.

Further, referring to fig. 3 and 10, the sub-flow passage 130 includes a first sub-flow passage 131 and two second sub-flow passages 132. The middle portion of the first sub flow channel 131 is communicated with the second end of the injection flow channel 120, and the first sub flow channel 131 is perpendicular to the injection flow channel. The two ends of the first branch flow channel 131 are communicated with the middle parts of the two second branch flow channels 132, and the two second branch flow channels 132 are perpendicular to the first branch flow channel 131. Two the second divides runner 132 tip respectively with four the first end intercommunication of sprue 110, the warp the liquid silica gel that pours into runner 120 and get into can reach four simultaneously in the sprue 110, the liquid silica gel warp annotates the export 111 simultaneously and pours into the mould die cavity into, makes four shaping chambeies in the mould atress balanced, and the quality that obtains four products is unanimous basically.

Further, referring to fig. 3 and 10, the first end of the injection runner 120 is connected to a glue inlet 121, and the glue inlet 121 is conveniently connected to a glue outlet of the feeding system.

Further, referring to fig. 9, the flow channel plate 400 is further uniformly provided with a plurality of cooling water channels 450, and the flow channel plate is cooled by the cooling water channels 450, so that the liquid silica gel in the injection flow channel 120, the main flow channel 110 and the sub-flow channels 130 in the flow channel plate is prevented from solidifying.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of the ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, its framework form can be nimble changeable, can derive series of products. But merely as a matter of simple deductions or substitutions, should be considered as belonging to the scope of patent protection of the present invention as determined by the claims submitted.

Claims (10)

1. The four-needle valve type cold runner die holder is characterized by comprising a die holder plate and a driving plate arranged on the die holder plate; the mold base plate is provided with at least one main runner, the mold base plate is further provided with an injection runner communicated with a first end of the main runner, a second end of the main runner extends to one end, far away from the driving plate, of the mold base plate, and the diameter of the second end of the main runner is gradually reduced to form a conical injection port;

at least one driving mechanism is arranged in the driving plate, and the driving mechanism is arranged corresponding to the main runner; the main flow passage is coaxially provided with a valve needle, and the diameter of the valve needle is smaller than that of the main flow passage; the first end of the valve needle is connected with the driving mechanism, the second end of the valve needle is a glue sealing end, and the driving mechanism drives the glue sealing end to seal the injection port or unseal the injection port.

2. The one-out four-pin valve type cold runner die holder of claim 1, wherein: the driving mechanism comprises a cylinder body arranged in the driving plate; the piston is connected in the cylinder body in a sliding manner, and divides the interior of the cylinder body into an upper cavity and a lower cavity which are independent of each other; the driving plate is also provided with two air passages, one ends of the two air passages extend to the side wall of the driving plate, and the other ends of the two air passages are respectively communicated with the upper cavity and the lower cavity; the first end of the valve needle passes through the die base plate and the driving plate to be connected with the piston.

3. The one-out four-pin valve type cold runner die holder of claim 2, wherein: the die base plate is characterized in that a groove is dug in one end, far away from the die base plate, of the driving plate, the cylinder body is installed in the groove, and a cover plate is hermetically covered at an opening of the groove, so that a sealed cavity is formed in the cylinder body.

4. The one-out four-pin valve type cold runner die holder of claim 2, wherein: one end of the driving plate, which is close to the die seat plate, is provided with a connecting hole communicated with the cylinder body in a penetrating manner, and the first end of the valve needle penetrates through the connecting hole to be connected with the piston; the valve needle is provided with a valve needle sleeve in a sealing manner, and the valve needle sleeve covers the connecting hole in a sealing manner.

5. The die holder for a four-pin valve type cold runner as claimed in any one of claims 1 to 4, wherein: the die holder plate comprises a heating plate, a heat insulation plate and a runner plate which are sequentially connected; the runner plate is connected with the driving plate; the injection runner is arranged on the runner plate, the first end of the main runner is arranged on the runner plate, the main runner extends to sequentially penetrate through the heat insulation plate and the heating plate, and the second end of the main runner extends to the end part of the heating plate.

6. The one-out four-pin valve type cold runner die holder of claim 5, wherein: the die base plate also comprises a cold water nozzle and a nozzle; one end of the cold water nozzle is mounted on the runner plate, and the injection nozzle is mounted at the other end of the cold water nozzle; a clearance groove penetrates through the heat insulation plate and the heating plate, the cold water nozzle and the nozzle are accommodated in the clearance groove, a clearance cavity is formed between the cold water nozzle and the clearance groove, and the nozzle is hermetically connected with the clearance groove on the heating plate; the main runner penetrates through the cold water nozzle and the axis of the injection nozzle in sequence, and the injection outlet is formed in the injection nozzle.

7. The one-out four-pin valve type cold runner die holder of claim 6, wherein: the runner plate is provided with a water inlet runner and a water outlet runner; one ends of the water inlet channel and the water outlet channel extend to the side wall of the runner plate, double-spiral water inlets and water outlets are formed in the cold water nozzle, and the other ends of the water inlet channel and the water outlet channel are communicated with the double-spiral water inlets and the double-spiral water outlets respectively.

8. The die holder for a four-pin valve type cold runner as claimed in any one of claims 1 to 4, wherein: the die base plate is provided with four main flow channels which are uniformly distributed with the die base plate; the first end of the injection runner extends to the side wall of the mold base plate, and the second end of the injection runner is communicated with the first ends of the four main runners through the branch runners.

9. The one-out four-pin valve type cold runner die holder of claim 8, wherein: the branch flow passage comprises a first branch flow passage and two second branch flow passages; the middle part of the first branch runner is communicated with the second end of the injection runner, two ends of the first branch runner are communicated with the middle parts of the two second branch runners, and the end parts of the two second branch runners are respectively communicated with the first end of the four main runners.

10. The one-out four-pin valve type cold runner die holder of claim 8, wherein: the first end of the injection runner is connected with a glue inlet nozzle.

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