CN115648554A - Double-pipeline double-layer hot runner inner and outer rubber coating injection mold - Google Patents

Abstract

The invention relates to the technical field of injection molding, in particular to an injection mold for internally and externally encapsulating double-pipeline double-layer runners, which comprises a splitter plate, a hot nozzle arranged below the splitter plate and a module for embedding and fixing the hot nozzle, wherein an accommodating cavity for placing an injection molding piece is arranged on the module corresponding to the hot nozzle, the splitter plate comprises a splitter plate body, heating parts respectively arranged at two sides of the splitter plate body and a plurality of splitter plate runners clamped between the two heating parts, and a glue material channel is arranged on the hot nozzle corresponding to the plurality of splitter plate runners. The application provides a pair of inside and outside rubber coating injection mold of double-deck hot runner of double-pipe, it can carry out inside and outside rubber coating to the injection molding to make the sizing material can be heated evenly, avoid blockking up or the agglomeration, improved injection moulding product's quality greatly.

Description

Double-pipeline double-layer hot runner inner and outer rubber coating injection mold

[ technical field ] A

The invention relates to the technical field of injection molding, in particular to an injection mold with double pipelines, double layers of runners and internal and external rubber coating.

[ background of the invention ]

With the continuous development of injection molding technology, particularly the application of double-color injection molding technology in the field of injection molding machines is more and more extensive, new requirements are put forward in the market, plastic products are also continuously developed towards the direction of precision, diversification, light weight and diversification, and aiming at a method for injection molding of double-color products, the prior art usually adopts two sets of molds, the first mold is subjected to primary injection molding, after cooling molding, an intermediate product is taken out and placed in the second mold for secondary injection molding, a final product is obtained after cooling molding, and the transfer and replacement of the intermediate product are time-consuming and labor-consuming; the other type adopts a double-runner mold, two splitter plates are combined for double-color injection molding, temperature imbalance exists between the splitter plates, and the phenomenon of blockage at a glue injection port is easy to occur.

[ summary of the invention ]

The invention aims to provide an inner and outer rubber coating injection mold of a double-pipeline double-layer hot runner, which can carry out inner and outer rubber coating injection on an injection molding piece, enables rubber materials to be heated uniformly, avoids blockage or agglomeration, and greatly improves the quality of injection molding products.

The application is realized by the following technical scheme: the utility model provides an inside and outside rubber coating injection mold of double-deck hot runner of double-pipe, include the flow distribution plate, install in hot mouth and the confession of flow distribution plate below hot mouth embedding is fixed module, correspond on the module hot mouth is provided with the holding chamber that is used for placing the injection molding, the flow distribution plate includes the flow distribution plate body, divides to locate the heater block of flow distribution plate body both sides and press from both sides and locate two many flow distribution plate runners between the heater block, it is many to correspond on the hot mouth the flow distribution plate runner is provided with the sizing material passageway.

The double-pipeline double-layer runner inner and outer rubber coating injection mold is characterized in that at least two runner plates are arranged on the runner plate body, each runner plate respectively comprises a heating section externally connected with a feeding channel and a feeding section communicated with the heating section and a hot nozzle, and the two heating sections are layered up and down and are respectively close to the two heating parts on the upper side and the lower side.

According to the double-pipeline double-layer runner inner and outer rubber coating injection mold, the heating section comprises the first channel and the second channel which are arranged in a transversely-longitudinally staggered mode and communicated with each other, and the end parts of the first channel and the second channel are respectively communicated with the two adjacent sides of the flow distribution plate.

The double-pipeline double-layer runner inner and outer rubber coating injection mold comprises a heating component and a heating component, wherein the heating component is symmetrically arranged on two sides of the flow distribution plate, and the heating component comprises a first heating component and a second heating component which are transversely arranged on the flow distribution plate.

The double-pipeline double-layer runner inner and outer rubber coating injection mold comprises a first heating part and a second heating part, wherein the first heating part is arranged at the edge of the flow distribution plate, the end part of the first heating part is positioned at the outer side of the flow distribution plate, the second heating part comprises a first heating part transversely arranged on the middle section of the flow distribution plate and a second heating part extending along the first heating part in a bending mode, the second heating part is longitudinally arranged at the edge of the flow distribution plate, and the end part of the second heating part is positioned at the outer side of the flow distribution plate.

The double-pipeline double-layer runner inner and outer rubber coating injection mold comprises a hot nozzle body and a lower cover covering the hot nozzle body, wherein a discharge hole is formed in the lower cover, and a rubber material channel comprises a first rubber material channel and a second rubber material channel which are communicated with the flow distribution plate runner and the discharge hole, so that rubber materials with different colors can be injected into a casting.

According to the double-pipeline double-layer runner inner and outer rubber coating injection mold, the hot nozzle is further provided with the valve core which is located between the first rubber material channel and the second rubber material channel and communicated with the discharge hole, the valve core is used for allowing the valve needle to penetrate, and when the valve needle moves relative to the valve core, the second rubber material channel and the first rubber material channel are sequentially communicated with the discharge hole, so that inner and outer double-ring rubber materials are formed at the discharge hole.

According to the double-pipeline double-layer runner internal and external rubber coating injection mold, a material cavity is formed between the lower cover and the hot nozzle body, the first rubber material channel is communicated with the valve core, the bottom end of the second rubber material channel is communicated with the material cavity, and when the valve needle moves towards the position far away from the discharge hole, the first rubber material channel and the second rubber material channel are sequentially communicated so as to perform internal and external rubber coating injection molding operation on a casting.

The double-pipeline double-layer runner inner and outer rubber coating injection mold comprises a hot nozzle body, wherein the hot nozzle body is provided with a third heating element arranged on the peripheral side of the hot nozzle body.

The double-pipeline double-layer runner inner and outer rubber coating injection mold comprises an upper mold plate and a lower mold plate, wherein the upper mold plate is provided with a containing hole for placing the hot nozzle, the lower mold plate further comprises a mold core arranged in the containing groove for placing an injection molding piece, and a through hole is formed in the mold core corresponding to the discharge hole.

Compared with the prior art, the method has the following advantages:

the invention relates to an injection mold for internally and externally encapsulating double-pipeline double-layer hot runners, which comprises a splitter plate, a hot nozzle arranged below the splitter plate and a module for fixedly embedding the hot nozzle, wherein the module is provided with an accommodating cavity for placing an injection molding part corresponding to the hot nozzle, the splitter plate comprises a splitter plate body, heating parts respectively arranged at two sides of the splitter plate body, and a plurality of splitter plate runners clamped between the two heating parts and used for injecting different colors of rubber materials, the hot nozzle is provided with rubber material channels corresponding to the plurality of splitter plate runners, the injection mold can be used for internally and externally encapsulating and injecting the injection molding part, the rubber materials can be uniformly heated, the blockage or agglomeration is avoided, and the quality of injection molding products is greatly improved.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an inner and outer rubber coating injection mold according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of another angle of the inner and outer rubber coating injection mold according to the embodiment of the present application.

FIG. 3 isbase:Sub>A cross-sectional view A-A of an inner and outer overmold injection mold of an embodiment of the present application.

FIG. 4 is a sectional view taken along line B-B of an inner and outer overmold injection mold of an embodiment of the present application.

FIG. 5 is a C-C cross-sectional view of an inner and outer overmold injection mold of an embodiment of the present application.

FIG. 6 is a D-D cross-sectional view of an inner and outer overmold injection mold of an embodiment of the present application.

FIG. 7 is a cross-sectional view E-E of an inner and outer overmold injection mold of an embodiment of the present application.

Fig. 8 is a schematic structural diagram of a flow distribution plate according to an embodiment of the present application.

Fig. 9 is a schematic structural view of a hot nozzle according to an embodiment of the present application.

Fig. 10 is an exploded view of a hot nozzle according to an embodiment of the present application.

FIG. 11 is a schematic view of a core according to an embodiment of the present application.

[ detailed description ] embodiments

In order to make the technical problems, technical solutions and advantageous effects solved by the present application more clear and obvious, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

As shown in fig. 1 to 11, an embodiment of the present application provides a dual-channel dual-layer hot runner internal and external rubber coating injection mold, which includes a flow distribution plate 1, a hot nozzle 2 installed below the flow distribution plate 1, and a module 3 for embedding and fixing the hot nozzle 2, wherein the module 3 is provided with an accommodating cavity 31 for placing an injection molding part corresponding to the hot nozzle 2, the flow distribution plate 1 includes a flow distribution plate body 11, heating parts 12 respectively disposed at two sides of the flow distribution plate body 11, and a plurality of flow distribution plate runners 13 sandwiched between the two heating parts 12 for injecting rubber materials with different colors, the hot nozzle 2 is provided with rubber material runners 21 corresponding to the plurality of flow distribution plate runners 13 for performing internal and external rubber coating operations on a casting, and the two flow distribution plate runners 13 are disposed between the two heating parts 12, so that the rubber materials in the flow distribution plate runners 13 are uniformly heated, the injection molding part can be subjected to internal and external rubber coating injection molding, and the rubber materials can be uniformly heated, thereby avoiding blocking or agglomeration, and greatly improving the quality of injection molding products.

The flow distribution plate body 11 at least comprises two flow distribution plate runners 13, the two flow distribution plate runners 13 respectively comprise heating sections 131 externally connected with a feeding channel and feeding sections 132 communicated with the heating sections 131 and the glue material channel 21, the two heating sections 131 are layered and respectively close to the two heating parts 12, when the two heating sections 131 are arranged between the two heating parts 12 in the same plane, because the heat reaching the middle of the heating parts 12 is limited, the two heating sections 131 need to equally divide the heat to melt the glue material in the two heating sections 131, the two heating sections 131 are layered and respectively close to the two heating parts 12, so that the heating parts are respectively subjected to the heat of the heating parts 12, and the phenomenon that the glue material in the inner part is agglomerated or even blocked in the heating sections 131 due to uneven heating is avoided; wherein, two the flow distribution plate runner 13 is followed respectively the center pin symmetry of flow distribution plate 1, heat section 131 including violently indulge crisscross first passageway 133 and the second passageway 134 that sets up and communicate, first passageway 133 with the tip of second passageway 134 communicate respectively in on the adjacent both sides of flow distribution plate 1, two flow distribution plate runner 13 is for two when setting up in same relative position the rest positions of flow distribution plate runner 13, the heat of heating part 12 is difficult to utilize, causes the heat to scatter and disappear, through with two flow distribution plate runner 13 staggers the setting, with furthest's utilization the produced heat of heating part 12, the utilization ratio is higher.

The cross section of the feeding section 132 is of a kidney bean shape, so that the feeding area is increased, meanwhile, the material can be spread in a round shape, and the excellent rate of products is guaranteed.

The heating component 12 includes symmetry set up in the heating component 121 of flow distribution plate 1 both sides, heating component 121 includes transversely set up first heating member 122 and the second heating member 123 on flow distribution plate 1, wherein, first heating member 122 set up in the edge of flow distribution plate 1, just the tip of first heating member 122 is located the outside of flow distribution plate 1, second heating member 123 including transversely set up in first heating portion 124 on flow distribution plate 1 middle section and edge the second heating portion 125 that first heating portion 124 buckled and extended, second heating portion 125 vertically set up in the edge of flow distribution plate 1, just the tip of second heating portion 125 is located the outside of flow distribution plate 1, its furthest's assurance the whole thermally equivalent of flow distribution plate 1 has improved thermal utilization ratio.

The hot nozzle 2 comprises a hot nozzle body 22 and a lower cover 23 covering the hot nozzle body 22, a discharge port 24 is formed in the lower cover 23, the sizing material channel 21 comprises a first sizing material channel 25 and a second sizing material channel 26 which are communicated with the flow distribution plate channel 13 and the discharge port 24 so as to perform injection molding of sizing materials with different colors on a casting, a valve core 27 located between the first sizing material channel 25 and the second sizing material channel 26 and communicated with the discharge port 24 is further arranged on the hot nozzle 2, a valve needle penetrates through the valve core 27 and moves relative to the valve core 27 so as to communicate/isolate the first sizing material channel 25, the second sizing material channel 26 and the discharge port 24, a material cavity 28 is formed between the lower cover 23 and the hot nozzle body 22, the first sizing material channel 25 is communicated with the valve core 27, the bottom end of the second sizing material channel 26 is communicated with the material cavity 28, when the valve needle moves towards the inside and outside away from the discharge port 24, the first sizing material channel 25 and the second sizing material channel 26 are communicated in sequence so as to perform encapsulation operation on the casting, the encapsulation insert 29, and the insert 29 is arranged on the molding insert 29, and the molding insert 29 is greatly shortened in the injection molding process of the casting.

The lower cover 23 comprises a lower cover main body 231 covering the outer side of the hot nozzle body 22 and an insert 232 arranged between the lower cover main body 231 and the insert 29, when the hot nozzle is used for a long time, certain impact force is applied to the insert 29 by glue, the insert 29 is easy to wear and even damage the lower cover 23, the lower cover main body 231 and the insert 232 are arranged, the lower cover 23 does not need to be integrally replaced, and the cost of later maintenance is reduced.

The inboard orientation that is equipped with of lower cover 23 discharge gate 24 slope, just be "hourglass hopper-shaped" feed chute 233, the sizing material of inside of being convenient for flows out.

Hot mouth 2 is still including installing in the third heating member 20 of hot mouth body 22 week side, wherein still be equipped with on the hot mouth body 22 along hot mouth body 22 week side and orientation the kink 221 of hot mouth body 22 bottom bending extension, kink 221 with form a storage tank 222 between the hot mouth body 22, be equipped with first breach 223 on the kink 221, third heating member 20 one end embedding extremely in the storage tank 222, just the link that third heating member 20 and external world are connected by first breach 223 department wears out, sets up third heating member 20, to getting into rubber material in the hot mouth 2 heats or keeps warm, avoids it to be in hot mouth 2 internal hardening causes the jam or influences processingquality.

The module 3 comprises an upper template 32 and a lower template 33, wherein the upper template 32 is provided with a containing hole 321 for placing the hot nozzle 2, the lower template 33 further comprises a core 34 arranged in the containing groove 31 for placing an injection molding piece, the core 34 is provided with a through hole 341 corresponding to the discharge hole 24, the lower template 33 is provided with a water inlet 331 and a water outlet 332, a cooling cavity 333 communicated with the water inlet 331 and the water outlet 332 is arranged between the outer side of the core 34 and the lower template 33, a plurality of heat dissipation fins 342 are arranged on the outer side of the core 34 for dissipating heat in the core 34, the heat dissipation fins 342 can increase the contact area with the outside, dissipate heat of the rubber material to the core 34, and dissipate the heat quickly, thereby improving the processing quality and the processing efficiency of the injection molding piece.

The water inlet 331 and the water outlet 332 are respectively arranged at two sides of the lower template 33, a plurality of groups of the cores 34 are arranged on the lower template 33, a channel 334 communicated with the plurality of groups of the cores 34 is arranged on the lower template 33, so that water enters from the water inlet 331, sequentially flows through the plurality of groups of the cores 34 and then flows out from the water outlet 332, the relative height of the water inlet 331 is lower than that of the water outlet 332, a plurality of groups of through holes 343 which are arranged in a staggered manner are arranged at the upper end of the cores 34 to communicate the cooling cavity 333 with the channel 334, and therefore the water can stay in the cooling cavity 333 and exchange heat with the cores 34 and the heat dissipation fins 342, and the temperature can be lowered more thoroughly.

The peripheral sides of the heat dissipation fins 342 abut against the lower template 33, so that a closed cavity 344 is formed between the adjacent heat dissipation fins 342 and the lower template 33, second notches 345 are arranged at the edges of the heat dissipation fins 342 to communicate the adjacent closed cavity 344, and the adjacent second notches 345 are arranged on two sides of the mold core 34 in a staggered mode to slow down the speed of water flow, so that the heat dissipation fins can fully exchange heat and reduce the using amount of water.

The lower template 33 is connected with a fixing piece 335, the bottom end of the core 34 is provided with a flange 346, the fixing piece 335 is provided with a groove 336 corresponding to the flange 346, and the flange 346 abuts against the bottom end of the lower template 33 to fix the core 34, so that the stability is higher; sealing rings 347 are arranged at the upper end and the lower end of the mold core 34 to isolate the cooling cavity 333 from the outside, so that water leakage is avoided.

In summary, the present application has the following beneficial effects, but not limited to:

the invention relates to a double-pipeline double-layer hot runner internal and external rubber coating injection mold which comprises a splitter plate 1, a hot nozzle 2 arranged below the splitter plate 1 and a module 3 for embedding and fixing the hot nozzle 2, wherein an accommodating cavity 31 for placing an injection molding piece is arranged on the module 3 corresponding to the hot nozzle 2, the splitter plate 1 comprises a splitter plate body 11, heating parts 12 arranged on two sides of the splitter plate body 11, and a plurality of splitter plate runners 13 clamped between the two heating parts 12 and used for injecting rubber materials with different colors, the hot nozzle 2 is provided with rubber material channels 21 corresponding to the plurality of splitter plate runners 13 so as to perform internal and external rubber coating operation on a casting, the two splitter plate runners 13 are arranged between the two heating parts 12, so that the rubber materials in the splitter plate runners 13 are uniformly heated, the internal and external rubber coating injection molding of the injection molding piece can be performed, the rubber materials can be uniformly heated, blocking or agglomeration is avoided, and the quality of an injection molding product is greatly improved.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present application. Furthermore, the terms "center", "upper", "lower", "left", "right", "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 in describing the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing is illustrative of one or more embodiments provided in connection with the detailed description and is not intended to limit the disclosure to the particular forms disclosed. Similar or identical methods, structures and the like, or several technical deductions or substitutions made on the premise of the conception of the application, should be regarded as the protection scope of the application.

Claims (10)

1. The utility model provides a double-deck hot runner of double-duct rubber coating injection mold inside and outside, its characterized in that includes flow distribution plate (1), install in hot mouth (2) of flow distribution plate (1) below and supply hot mouth (2) embedding is fixed module (3), correspond on module (3) hot mouth (2) are provided with holding chamber (31) that are used for placing the injection molding, flow distribution plate (1) include flow distribution plate body (11), divide locate heating part (12) of flow distribution plate body (11) both sides and press from both sides locate two many flow distribution plate runners (13) between heating part (12), it is many to correspond on hot mouth (2) flow distribution plate runner (13) are provided with sizing material passageway (21).

2. The double-pipe double-layer hot runner inner-outer rubber coating injection mold as claimed in claim 1, wherein at least two of the splitter plate runners (13) are arranged on the splitter plate body (11), the splitter plate runners (13) respectively comprise a heating section (131) externally connected with a feed channel and a feeding section (132) communicated with the heating section (131) and the hot nozzle, and the two heating sections (131) are layered up and down and respectively arranged close to the two heating parts (12) on the upper side and the lower side.

3. The double-channel double-layer hot runner inner-outer rubber coating injection mold as claimed in claim 2, wherein the heating section (131) comprises a first channel (133) and a second channel (134) which are arranged in a staggered manner and are communicated with each other, and the ends of the first channel (133) and the second channel (134) are respectively communicated with two adjacent sides of the flow distribution plate.

4. The dual-channel dual-layer hot runner overmold/overmold mold as recited in claim 1, wherein said heating element (12) comprises heating elements (121) symmetrically disposed on opposite sides of said manifold (1), said heating elements (121) comprising first (122) and second (123) heating elements transversely disposed on said manifold (1).

5. The double-pipe double-layer hot runner inner-outer rubber coating injection mold according to claim 4, wherein the first heating element (122) is arranged at the edge of the flow distribution plate (1), and the end of the first heating element (122) is located at the outer side of the flow distribution plate (1), the second heating element (123) comprises a first heating part (124) transversely arranged on the middle section of the flow distribution plate (1) and a second heating part (125) extending along the first heating part (124) in a bending manner, the second heating part (125) is longitudinally arranged at the edge of the flow distribution plate (1), and the end of the second heating part (125) is located at the outer side of the flow distribution plate (1).

6. The double-pipeline double-layer hot runner inner-outer rubber coating injection mold as claimed in claim 1, wherein the hot nozzle (2) comprises a hot nozzle body (22) and a lower cover (23) covering the hot nozzle body (22), a discharge hole (24) is formed in the lower cover (23), and the rubber material channel (21) comprises a first rubber material channel (25) and a second rubber material channel (26) which are communicated with the splitter plate flow channel (13) and the discharge hole (24).

7. The double-pipeline double-layer hot runner inner and outer rubber coating injection mold as claimed in claim 6, wherein a valve core (27) which is located between the first rubber material channel (25) and the second rubber material channel (26) and is communicated with the discharge port (24) is further arranged on the hot nozzle (2), the valve core (27) is used for a valve needle to penetrate through, and when the valve needle moves relative to the valve core (27), the second rubber material channel (26) and the first rubber material channel (25) are sequentially communicated with the discharge port (24) so as to form inner and outer double-ring rubber materials at the discharge port (24).

8. The double-channel double-layer hot runner inner-outer rubber coating injection mold as claimed in claim 7, wherein a material cavity (28) is formed between the lower cover (23) and the hot nozzle body (22), the first material channel (25) is communicated with the valve core (27), the bottom end of the second material channel (26) is communicated with the material cavity (28), and when the valve needle moves away from the discharge port (24), the first material channel (25) and the second material channel (26) are communicated in sequence.

9. The double-pipe double-layer hot runner inner and outer rubber coating injection mold according to claim 6, wherein the hot nozzle (2) further comprises a third heating element (20) arranged on the peripheral side of the hot nozzle body (22).

10. The double-pipe double-layer hot runner inner and outer rubber coating injection mold according to claim 1, wherein the mold set (3) comprises an upper mold plate (32) and a lower mold plate (33), the upper mold plate (32) is provided with a containing hole (321) for placing the hot nozzle (2), the lower mold plate (33) further comprises a core (34) arranged in the containing groove (31) for placing an injection molding piece, and the core (34) is provided with a through hole (341) corresponding to the discharge hole (24).

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