CN211440913U

CN211440913U - Double-color mixing injection die head

Info

Publication number: CN211440913U
Application number: CN201921168494.9U
Authority: CN
Inventors: 刘宏; 张文君; 钟孟巧; 林国荣; 陈烨; 陈绪明; 张光民
Original assignee: Donghua Machinery Co Ltd
Current assignee: Donghua Machinery Co Ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-09-08
Anticipated expiration: 2029-07-23

Abstract

The utility model discloses a double-color mixing injection die head, which comprises a nozzle head provided with a jet orifice, a primary injection nozzle, a charging barrel head and a secondary injection nozzle, wherein the central axis of the charging barrel head is provided with the primary injection nozzle and the secondary injection nozzle; an inner flow passage communicated with the spray outlet of the nozzle head is arranged in the cylinder head and the sub-spray nozzle; an outer flow passage communicated with the spray port of the nozzle head is formed among the material cylinder head, the primary injection nozzle and the secondary injection nozzle; a material stopping gasket is arranged among the material cylinder head, the female injection nozzle and the sub injection nozzle, pins are arranged on the material stopping gasket and the material cylinder head in the circumferential direction for positioning, and an outer flow passage penetrates through the material stopping gasket. The utility model provides a double-colored mixed injection die head realizes that the injection runner passageway is simple, no dead angle, not long-pending material, tear open and trade convenience, function are various, the goods yield is high.

Description

Double-color mixing injection die head

Technical Field

The utility model relates to an injection molding machine technical field specifically is a double-colored mixed injection die head.

Background

As used herein, "dual color" is an industry term that broadly refers to two plastic materials or the same material in different colors or the same material in the same color, or to a mechanism that provides at least two plasticizing and injection systems. The injection table of the current mixed color injection molding machine mostly adopts a common single-color injection table structure assembly style, such as a right-angle type, an oblique angle type, a parallel assembly type and the like, although the injection table can realize double-color mixed injection, the injection die head of the injection molding machine mostly has the problems of complicated flow passage, more corners, more dead angles and easy material accumulation, plasticized rubber materials are accumulated and stopped at the dead angles of the flow passage for a long time, subsequent rubber materials can not push out or take away the accumulated rubber materials, the phenomenon like vortex is generated at the corners, and the rubber materials are caused to be stopped and heated, decomposed and deteriorated, yellowed and blacked and the like for a long.

Therefore, how to solve the above problems is a problem to be solved urgently.

Disclosure of Invention

The utility model discloses to above technical problem, provide a double-colored mixed injection die head, realize that the injection runner passageway is simple, no dead angle, long-pending material, tear open and trade convenience, function are various, the goods yield is high.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a double-color mixing injection die head comprises a nozzle head provided with a jet orifice, a primary injection nozzle, a charging barrel head and a secondary injection nozzle, wherein the central axis of the charging barrel head is connected with the primary injection nozzle and the secondary injection nozzle; an inner flow passage communicated with the spray outlet of the nozzle head is arranged in the cylinder head and the sub-spray nozzle; an outer flow passage communicated with the spray port of the nozzle head is formed among the material cylinder head, the primary injection nozzle and the secondary injection nozzle; a material stopping gasket is arranged among the material cylinder head, the female injection nozzle and the sub injection nozzle, pins are arranged on the material stopping gasket and the material cylinder head in the circumferential direction for positioning, and an outer flow passage penetrates through the material stopping gasket. The dual-color injection device is provided with the primary injection nozzle, the secondary injection nozzle and the inner and outer dual-flow channels, so that dual-color mixed injection is realized, and the injection flow channel has a simple channel.

A first straight-through outer flow channel hole and a first inner flow channel hole which are formed in a one-time processing mode are arranged on two sides of the central axis of the charging barrel head;

the outer wall of the sub-injection nozzle, the inner wall of the main injection nozzle and the inner wall of the nozzle head form an outer flow channel cavity communicated with the first outer flow channel hole, a second outer flow channel hole aligned and communicated with the first outer flow channel hole is arranged on the material stopping gasket, and the first outer flow channel hole, the second outer flow channel hole and the outer flow channel cavity form an outer flow channel;

and the central axis of the sub-jet nozzle is provided with an inner flow channel hole II communicated with the inner flow channel hole I and the jet orifice of the nozzle head, and the inner flow channel hole I and the inner flow channel hole II form an inner flow channel. The through type inner and outer flow channel holes formed by one-time processing are arranged, dead angles are avoided, material accumulation is avoided, and the product yield is high.

And an outer flow channel conical pit and an inner flow channel conical pit are arranged at the corresponding positions of the outer flow channel hole I and the inner flow channel hole I on the end surface of the charging barrel head. The structure of the conical pit ensures the contact tightness during feeding and prevents leakage.

The front part of a jet nozzle of a step is provided with a shuttle accommodating cavity, a shunt shuttle with an inner flow channel hole III is arranged in the shuttle accommodating cavity, the front end and the rear end of the shunt shuttle are conical surfaces, the conical angles of the front conical surface and the rear conical surface of the shunt shuttle are consistent with the conical angles of the corresponding conical surfaces in the shuttle accommodating cavity, a gap is arranged between the front conical surface and the rear conical surface of the shunt shuttle and the inner conical surface of the shuttle accommodating cavity, the front part of the inner flow channel hole III of the shunt shuttle is communicated with a jet nozzle, and a through flow hole I communicated with the inner flow. And the interlayer injection can be realized by arranging the through-flow hole I.

And a second through hole communicated with the third inner runner hole is formed in the front conical surface of the shunt shuttle. And the second through hole can realize mixed injection.

The conical tip of the secondary nozzle is provided with a through flow hole III which is communicated with the inner flow channel hole II and the outer flow channel cavity. The mixed injection is realized, the fusion process is increased, the color lump diffusivity is enhanced, the area range of gradual color mixing generated after the product is molded is enlarged, 2-4 color mixing patterns can be generated by one-time co-injection, and the efficiency is improved.

And a plurality of radial through-flow holes communicated with the inner flow channel hole II and the outer flow channel cavity are formed in the cylindrical section in the front part of the secondary nozzle. The mixed injection is realized, the fusion process is longer, the color lump diffusion is more uniform, the area range of the gradual change color mixing generated after the product is molded is larger, more color mixing patterns can be generated by one-time co-injection, and the efficiency is higher.

The outer wall of the secondary nozzle is uniformly provided with 2-4 rhombic supporting blocks along the circumferential direction. The number of the rhombic supporting blocks is not less than 2, otherwise, the supporting effect is not good enough, and is not more than 4, otherwise, excessive flow resistance is generated on the rubber material; the long diagonal line of the diamond-shaped block is parallel to and follows the central axis of the sub-injection nozzle, the short diagonal line of the diamond-shaped block is perpendicular to the central axis of the sub-injection nozzle 7, the four sides of the diamond-shaped block are straight sides, the processing is slightly simpler and more economical than that of an ellipse, the flow resistance of the rubber material during injection is reduced to the greatest extent compared with other shapes such as a square shape, a triangle shape, a circle shape and the like, and no dead angle and no material accumulation are caused in the arrangement.

And 2 or 4 plane wrench positions are uniformly arranged in the circumferential direction of the outer wall of the front part of the secondary nozzle and are positioned outside the front end surface of the primary nozzle. The wrench has the advantages that the sub-nozzle can be conveniently detached by using the wrench tool only after the nozzle head is detached, the operation is very simple and convenient only by stopping the machine to detach and replace the sub-nozzle on the production line.

Compared with the prior art, the utility model have following technical advantage:

1. the direct-through type internal and external injection flow channel is provided with the internal and external split-type primary and secondary injection nozzles, has no dead angle and no material accumulation, can be assembled and changed into various mixed structures by simply disassembling and changing different split-flow shuttles or the secondary injection nozzles, and can realize interlayer injection or mixed co-injection;

2. the device can produce various mixed-color products with different styles according to the matching of the production process, has simple structure and various functions, and solves the problems of complicated structure, more dead angles, easy material accumulation, poor products and the like of the flow passage of the existing mixed-color injection die head.

Drawings

FIG. 1 is an exploded view of an injection die;

FIG. 2 is a cross-sectional view of an injection die;

FIG. 3 is a partial view taken at K of the push-out state of the shunt shuttle;

FIG. 4 is a partial view of the retracted state of the shunt shuttle;

FIG. 5 is a partial view of a second hybrid structure;

FIG. 6 is a partial view of a third hybrid architecture;

FIG. 7 is a partial view of a fourth hybrid configuration;

fig. 8 is a partial view of a fifth hybrid configuration.

In the figure: the nozzle comprises a nozzle head 1, a front inner conical surface 13, an ejection opening 111, a shunt shuttle 2, an inner runner hole III 22, a front conical surface 23, a rear conical surface 24, a through flow hole II 231, a through flow hole I242, a female nozzle 3, an outer runner cavity 31, a front end surface 33, a pin 4, a material stopping gasket 5, an outer runner hole II 51, a cartridge head 6, an outer runner hole I61, an inner runner hole I62, an outer runner cone pit 63, an inner runner cone pit 64, a sub-nozzle 7, an inner runner hole II 72, a supporting block 73, a wrench position 74, a rear inner conical surface 75, a shuttle accommodating cavity 76, a radial through flow hole 722 and a through flow hole III 723.

Detailed Description

The invention will be described in further detail below with reference to embodiments shown in the drawings.

As shown in fig. 1-8, the utility model discloses a two-color mixing injection die head, wherein an outer flow channel conical pit 63 and an inner flow channel conical pit 64 are symmetrically arranged in parallel at two sides of the central axis of a material cylinder head 6, and an outer flow channel hole one 61 is directly processed from the bottommost part of the outer flow channel conical pit 63 at a proper deflection angle to the front part of the material cylinder head 6 and is communicated with an outer flow channel cavity 31; the first inner runner hole 62 is directly machined from the bottommost part of the inner runner conical pit 64 at a proper deflection angle to the central axis of the front part of the charging barrel head 6 and is communicated with the second inner runner hole 72; the beneficial effects are that outer runner hole one 61 and inner runner hole one 62 can one-time machine-shaping, straight-through no corner.

As shown in fig. 2, the female nozzle 3 is installed and connected to the central axis of the front part of the charging barrel head 6 in a threaded manner, the nozzle head 1 is installed at the front part of the female nozzle, the sub-nozzle 7 provided with the second inner runner hole 72 is also installed and connected to the central axis of the front part of the charging barrel head 6 in a threaded manner, and is sleeved in a cavity formed by the female nozzle 3 and the inner wall of the nozzle head 1, so that an inner rubber injection runner and an outer rubber injection runner are respectively arranged; the outer wall of the sub-jet nozzle 7, the inner walls of the main jet nozzle 3 and the nozzle head 1 form an outer flow channel cavity 31 communicated with the outer flow channel hole I61; the inner flow channel consists of an inner flow channel hole I62 and an inner flow channel hole II 72, and the outer flow channel consists of an outer flow channel hole I61, an outer flow channel hole II 51 and an outer flow channel cavity 31.

For the sake of simplicity, the rubber material injected through the outer flow channel is referred to as "a rubber" hereinafter, and the rubber material injected through the inner flow channel is referred to as "B rubber".

As shown in fig. 1/2, the material stopping washer 5 is provided at the assembly joint of the cartridge head 6, the female nozzle 3 and the sub-nozzle 7, and the pin 4 is used to position the material stopping washer 5 and the cartridge head 6 in the circumferential direction, so as to ensure that the outer flow passage hole 51 is aligned and communicated with the outer flow passage hole 61, thereby the design has the advantage of not causing a large amount of glue to be accumulated in the part.

As shown in fig. 1, 2-4 rhombic supporting blocks 73 are uniformly arranged on the outer wall of the sub-nozzle 7 along the circumferential direction, the number of the rhombic supporting blocks is not less than 2, otherwise, the supporting effect is not good enough, and is not more than 4, otherwise, excessive flow resistance is generated on the rubber material; the long diagonal line of the diamond-shaped block is parallel to and follows the central axis of the sub-nozzle 7, the short diagonal line of the diamond-shaped block is perpendicular to the central axis of the sub-nozzle 7, the four sides of the diamond-shaped block are straight sides, the processing is slightly simpler and more economical than that of an ellipse, the flow resistance of the rubber material during injection is reduced to the greatest extent compared with other shapes such as a square shape, a triangle shape, a circle shape and the like, and the arrangement has no dead angle and no material accumulation.

As shown in fig. 1, 2-4 planar wrench positions 74 are uniformly arranged in the circumferential direction of the outer wall of the front portion of the sub-injection nozzle 7, the number of wrench positions is preferably 2 or 4 even numbers, the number of wrench positions is obviously odd numbers, the conventional and common wrench can not be normally used, more than 4 wrench positions can weaken more structural strength, after the installation is completed, the wrench positions 74 are located outside the front end face 33 of the main injection nozzle 3, the beneficial effects of the arrangement are that the sub-injection nozzle 7 can be conveniently detached by using a wrench tool only after the nozzle head 1 is detached, the disassembly and replacement work on a production line can be carried out only by stopping the machine, and the operation is very simple and convenient.

By simply removing the nozzle head 1 and replacing the split shuttle 22 having a different style or the sub-nozzle 7 having a different style, the sandwich or hybrid structure shown in fig. 3 to 8 can be assembled and changed, and the differences and characteristics thereof will be described below by way of example.

First embodiment, fig. 3 and 4 show two operating states of a sandwich sequential injection structure, which is particularly suitable for producing sandwich two-color products and also for producing non-sandwich mixed-color products suitable for sequential injection processes.

As shown in fig. 1, 3 and 4, a shuttle accommodating cavity 76 is arranged at the front part of the sub-jet nozzle 7 for accommodating the shunt shuttle 2 with the inner runner hole three 22, when only a through-flow hole one 242 is arranged on the rear conical surface 24 of the shunt shuttle 2, the liquid B glue injected into the inner runner hole two 72 by pressure generates thrust at the rear conical surface 24, the shunt shuttle 2 is pushed forwards, the front conical surface 23 with the same cone angle is attached and sealed with the front inner conical surface 13 in the nozzle head 1, the outer runner cavity 11 is not communicated with the jet orifice 111, and the B glue can flow into the inner runner hole three 22 through the through-flow hole one 242, is jetted from the jet orifice 111 and cannot flow backwards to the outer runner cavity 31; when the injection of the glue B is stopped and the pressure injection of the liquid glue A in the outer flow channel is started, the glue A acts on the front conical surface 23 with a different cone angle from the front inner conical surface 13 and generates thrust to push the shunt shuttle 2 back, the rear conical surface 24 with the same cone angle is tightly attached to the rear inner conical surface 75, the first through hole 242 is closed, the third inner flow channel hole 22 is not communicated with the inner flow channel hole 72, meanwhile, the front conical surface 23 of the shunt shuttle 2 is separated from the front inner conical surface 13 by a proper gap, the glue A can be sprayed out from the spray port 111 and cannot flow back to the third inner flow channel hole 22; this allows the sandwich injection to be performed, and the sequence of the injection action is usually represented by the formula "A → B → A", or "B → A → B".

In the second embodiment, as shown in fig. 5, when the through-flow hole two 231 is additionally arranged near the front conical surface 23 of the shunt shuttle 2, even in the state that the front conical surface 23 and the front inner conical surface 13 are attached and closed, the outer flow channel cavity 31 and the ejection port 111 are still communicated due to the action of the through-flow hole two 231, so that the function that two rubber compounds AB are mixed at the inner flow channel hole three 22 and then are simultaneously ejected through the ejection port 111, namely, the function of mixing and co-injecting can be realized, the injection operation sequence is that the rubber compound B is injected first, the shunt shuttle 2 is pushed forwards to the state shown in fig. 5, and then the two rubber compounds AB are injected simultaneously, namely, the formula "B → AB"; the mixed co-injection structure has a sealing effect, when the glue B is not injected and the glue A is injected, the shunt shuttle 2 is pushed back to enable the rear conical surface 24 and the rear inner conical surface 75 to be attached and sealed, the glue A cannot flow backwards to the second inner runner hole 72, and the mixed co-injection structure is suitable for producing mixed color products of which the injection amount needs to be accurately controlled; certainly, the structure shown in fig. 5 can also be used to produce non-sandwich type mixed color products by implementing injection actions not limited to patterns such as "B → AB → B", "B → AB → a", "a → B → a", "B → a → B", etc., the specific applicability depends on the product pattern and the requirements of the production process.

These commonalities are common to the configurations shown in figures 6, 7 and 8, which are all non-closing hybrid co-injection configurations, with a significant reduction in the splitter shuttle 2 and the sub-nozzle 7 without the need for machining the shuttle-receiving cavity 76, resulting in a limited economic cost savings; they can be injected sequentially or simultaneously, and the sequential alternate injection action of the patterns such as "a → B → a → … …", "B → a → B → … …", or the sequential co-injection action of the patterns such as "AB", "a → AB → a", "B → AB → … …" can be realized, and the suitable mixing structure can be selected by the customer according to the pattern of economy, shape, appearance, color, etc. of the product, and the matching of the production process such as injection pressure, speed, temperature, back pressure, action program, etc.

In the third embodiment, as shown in fig. 6, in the third mixing structure, when two types of glue AB are co-injected, the glue is sprayed out after the mixing action of extrusion and pulling at the spraying port 111, the fusion process is short, the color lumps or the pattern color stripes are concentrated, the diffusion is less, the range of the area where the gradual color mixing is generated after the product is molded is narrow, and only one color mixing pattern is generated after each co-injection. Particularly, when the AB is a rubber material with the same material and color, the double-color mixing structure can be conveniently used as a single-color injection unit, the injection amount is increased, and a customer can improve the production capacity and the equipment utilization rate without adding new equipment.

In the fourth embodiment, as shown in fig. 7, in the fourth mixing structure, 2 to 4 flow holes 723 are formed in the tapered tip portion of the sub-nozzle 7, so that the inner runner hole two 72 is communicated with the outer runner cavity 31, when two types of rubber AB are co-injected, the rubber AB is mixed in the tapered cavity 131 and then is sprayed out through the spray opening 111, the fusion process is increased, the color cluster diffusivity is enhanced, the area range of the gradual color mixing generated after the product is molded is enlarged, 2 to 4 color mixing patterns can be generated after each co-injection operation is completed, and the efficiency is improved.

In the fifth mixing structure shown in fig. 8, more radial through-flow holes 722 are additionally arranged in the cylindrical section in front of the sub-nozzle 7, and when two types of glue materials AB are co-injected, the glue materials are ejected after being extruded and pulled by the outer runner cavity 31, the conical cavity 131 and the ejection port 111, so that the fusion process is longer, the color cluster diffusion is more uniform, the range of the area where the gradual color mixing is generated after the product is molded is wider, more color mixing patterns can be generated after each co-injection operation is completed, and the efficiency is higher.

To sum up, the present invention, as described in the specification and the drawings, is made into a practical sample and tested by multiple use, and from the test result, it is proved that the utility model can achieve the intended purpose, and the practicability is undoubted. The above-mentioned embodiments are merely provided for convenience of illustration of the present invention and are not intended to be limiting in form; any person skilled in the art can make local changes or modifications without departing from the scope of the present invention and the technical features and similar features disclosed in the present invention, and all equivalent embodiments using the technical content disclosed in the present invention belong to the protection scope of the present invention.

Claims

1. A double-color mixing injection die head is characterized in that: the device comprises a nozzle head (1) provided with a spraying port (111), a primary injection nozzle (3), a charging barrel head (6) and a secondary injection nozzle (7), wherein the primary injection nozzle (3) and the secondary injection nozzle (7) are installed and connected at the central axis of the charging barrel head (6), the nozzle head (1) is installed at the front part of the primary injection nozzle (3), and the secondary injection nozzle (7) is arranged in a cavity formed by the primary injection nozzle (3) and the inner wall of the nozzle head (1); an inner flow passage communicated with a spray port (111) of the nozzle head (1) is arranged in the charging barrel head (6) and the sub-injection nozzle (7); an outer flow passage communicated with the spray port (111) of the nozzle head (1) is formed among the material cylinder head (6), the primary injection nozzle (3) and the secondary injection nozzle (7); a material stopping gasket (5) is arranged among the material cylinder head (6), the female injection nozzle (3) and the sub injection nozzle (7), pins (4) are arranged in the circumferential direction of the material stopping gasket (5) and the material cylinder head (6) for positioning, and an outer flow passage penetrates through the material stopping gasket (5);

the front part of the sub-nozzle (7) is provided with a shuttle accommodating cavity (76), a shunt shuttle (2) with an inner runner hole III (22) is arranged in the shuttle accommodating cavity (76), the front end and the rear end of the shunt shuttle (2) are conical surfaces, the conical angles of the front conical surface and the rear conical surface of the shunt shuttle (2) are consistent with the conical angle of the corresponding conical surface in the shuttle accommodating cavity (76), a gap is arranged between the front conical surface and the rear conical surface of the shunt shuttle (2) and the inner conical surface of the shuttle accommodating cavity (76), the front part of the inner runner hole III (22) of the shunt shuttle (2) is communicated with the ejection port (111), and a through flow hole I (242) communicated with the inner runner hole III (22) is arranged on the rear conical surface (24) of the.

2. The two-color mixing injection die of claim 1, wherein: a first straight-through outer flow channel hole (61) and a first inner flow channel hole (62) which are formed by one-time processing are arranged on two sides of the central axis of the charging barrel head (6);

the outer wall of the sub-injection nozzle (7), the inner wall of the main injection nozzle (3) and the inner wall of the nozzle head (1) form an outer flow channel cavity (31) communicated with the outer flow channel hole I (61), an outer flow channel hole II (51) aligned and communicated with the outer flow channel hole I (61) is arranged on the material stopping gasket (5), and the outer flow channel is formed by the outer flow channel hole I (61), the outer flow channel hole II (51) and the outer flow channel cavity (31);

and an inner runner hole II (72) communicated with the inner runner hole I (62) and the spray opening (111) of the nozzle head (1) is arranged at the central axis of the sub-jet nozzle (7), and the inner runner hole I (62) and the inner runner hole II (72) form an inner runner.

3. The two-color mixing injection die of claim 2, wherein: and an outer flow channel conical pit (63) and an inner flow channel conical pit (64) are arranged at the corresponding positions of the outer flow channel hole I (61) and the inner flow channel hole I (62) on the end surface of the charging barrel head (6).

4. The two-color mixing injection die of claim 1, wherein: and a second through hole (231) communicated with the third inner runner hole (22) is formed in the front conical surface (23) of the shunt shuttle (2).

5. The two-color mixing injection die of claim 1, wherein: the outer wall of the sub-injection nozzle (7) is uniformly provided with 2-4 rhombic supporting blocks (73) along the circumferential direction, the long diagonal of the rhombic block is parallel to the central axis of the sub-injection nozzle (7), and the short diagonal of the rhombic block is perpendicular to the central axis of the sub-injection nozzle (7).

6. The two-color mixing injection die of claim 1, wherein: 2 or 4 plane wrench positions (74) are uniformly arranged in the circumferential direction of the outer wall of the front part of the sub-nozzle (7) and are positioned outside the front end surface (33) of the main nozzle.