Combined type hot runner assembly of bottle cap injection mold

Abstract

The utility model provides a combined type hot runner assembly of a bottle cap injection mold, which relates to the technical field of plastic processing and comprises a hot runner plate, a plurality of positioning pipes are embedded on the hot runner plate, hot nozzles are inserted on the positioning pipes, and limiting pipe rings are packaged at the connecting ends of the hot nozzles and the positioning pipes. A heat source pipe is externally connected between the limiting pipe ring and the hot nozzle, an injection nozzle groove is formed between the hot nozzle and the limiting pipe ring in a penetrating mode, a separated hot flow cavity is concavely formed in the end, located in the injection nozzle groove, of the hot nozzle, and a flow channel row is arranged between the hot flow cavity and the heat source pipe in a penetrating mode. The hot nozzle structure has the beneficial effects that raw materials flowing through the hot nozzle structure can be heated through the combined hot nozzle inner pipeline and the hot flow pipe structure at the end part of the positioning pipe, so that the condition that the end part of the injection nozzle structure, the hot nozzle and the pipe section of the insertion end of the positioning pipe have relatively weak heat influence on the flowing of the raw materials is avoided; and the constant-temperature and constant-solution flowing performance of raw materials when the assembly is used for injection molding of the bottle cap is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic processing, in particular to a combined hot runner component of a bottle cap injection mold. Background Art

[0002] A hot runner is a heating component system used in injection molds to inject melted plastic particles into the mold cavity. A hot runner mold is a new structure that heats the runners and sprues of a traditional mold or a three-plate mold, eliminating the need to remove the runners and sprues during each molding process.

[0003] The hot runner ensures that the plastic in the runner and gate remains in a molten state by heating. Since heating rods and heating rings are provided near or in the center of the runner, the entire runner from the nozzle outlet of the injection molding machine to the gate is in a high temperature state, which keeps the plastic in the runner molten. After shutdown, it is generally not necessary to open the runner to remove the solidified material. When restarting the machine, it is only necessary to heat the runner to the required temperature. However, in the existing bottle cap injection molding module, the pipeline extends inward due to the shallow mold cavity and nozzle structure, making it difficult to heat-seal the exposed pipe section in some parts of the pipe section. After the raw material is guided through the pipeline, the fluidity of the pipe section and the hot nozzle end is usually limited, affecting the constant temperature, constant solution and stable runner transportation of the raw material. Utility Model Content

[0004] In view of the above technical problems existing in the prior art, a combined hot runner assembly of a bottle cap injection mold is provided.

[0005] The purpose and effect of this utility model are achieved by the following specific technical means:

[0006] A combined bottle cap injection mold hot runner assembly includes a hot runner plate, a plurality of positioning tubes are mounted on the hot runner plate, and each positioning tube is plugged with a hot nozzle, a limiting tube ring is encapsulated at the connection end between the hot nozzle and the positioning tube, and a heat source tube is externally connected between the limiting tube ring and the hot nozzle, a nozzle groove is formed between the hot nozzle and the limiting tube ring, and the hot nozzle is recessed inwardly at one end of the nozzle groove to form a separated hot flow cavity, and a runner row is provided between the hot flow cavity and the heat source tube;

[0007] A heat flow pipe is arranged around the outer side of the inner end of the positioning pipe, and a shutoff valve pipe is sleeved between the heat flow pipe and the outer side of the positioning pipe, and a valve pipe head is arranged between the shutoff valve pipe and the positioning pipe.

[0008] Furthermore, a heat insulation block axially penetrates the middle of the hot runner plate.

[0009] Furthermore, an inwardly concave L-shaped step surface is formed on the outer edge of the connecting end of the limiting pipe ring and the positioning pipe.

[0010] Furthermore, the heat flow cavity is an inwardly concave arch structure, and the inner end ring of the heat flow cavity is provided with a plurality of annular mesh rings, and the annular mesh rings are filled with high thermal conductivity materials.

[0011] Furthermore, a plurality of heat-insulating spherical columns are separated between the flow channel row and the outer wall of the hot nozzle.

[0012] Furthermore, the hot runner plate is embedded and packaged with a sealing copper ring at the outer end of the heat flow tube.

[0013] Furthermore, a pair of valve needle tubes are provided through both ends of the heat flow tube body, and the valve needle tubes are externally provided on both sides of the hot runner plate.

[0014] Furthermore, a gasket is filled between the shut-off valve tube and the positioning tube, and the shut-off valve tube is controlled to open and close by an electrical signal.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This combined hot runner assembly for the bottle cap injection mold can heat the raw materials flowing through it through the combined hot nozzle internal pipeline and the hot flow pipe structure at the end of the positioning tube, so as to avoid the situation where the pipe sections at the end of the nozzle structure and the hot nozzle and positioning tube connecting end have a weak thermal influence on the flow of raw materials, thereby improving the constant temperature and constant solution flow performance of the raw materials during the bottle cap injection molding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal planar structure of the hot nozzle of the utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure between the positioning tube and the hot runner plate of the utility model.

[0020] Markings in the figure: 1-hot runner plate; 2-insulation block; 3-hot nozzle; 4-positioning tube; 5-sealing copper ring; 6-valve needle tube; 7-limiting pipe ring; 8-nozzle groove; 9-heat source tube; 10-flow channel row; 11-annular mesh ring; 12-hot flow cavity; 13-shutoff valve tube; 14-valve tube head; 15-hot flow tube. DETAILED DESCRIPTION

[0021] See also Figure 1-3 , further illustrate the embodiments of the present utility model;

[0022] A combined bottle cap injection mold hot runner assembly includes a hot runner plate 1, on which are mounted a plurality of positioning tubes 4, each of which is plugged with a hot nozzle 3. A limiting tube ring 7 is encapsulated at the connection end between the hot nozzle 3 and the positioning tube 4, and a heat source tube 9 is externally connected between the limiting tube ring 7 and the hot nozzle 3. A nozzle groove 8 is formed between the hot nozzle 3 and the limiting tube ring 7, and the hot nozzle 3 has a separated hot flow cavity 12 recessed inwardly at one end of the nozzle groove 8, and a runner row 10 is provided between the hot flow cavity 12 and the heat source tube 9;

[0023] A heat flow pipe 15 is arranged around the outer side of the inner end of the positioning pipe 4 , and a shutoff valve pipe 13 is sleeved between the heat flow pipe 15 and the outer side of the positioning pipe 4 , and a valve pipe head 14 is arranged between the shutoff valve pipe 13 and the positioning pipe 4 .

[0024] The docking structure between the hot nozzle 3 and the positioning tube 4 in this assembly corresponds to the end of the nozzle structure. The nozzle structure will be inserted into the nozzle groove 8 of the hot nozzle 3 by means of plugging and docking. Through the contact between the heat flow cavity 12 and the end of the nozzle structure, the external heat source tube 9 is used to provide heat source medium to the end of the heat flow cavity 12, thereby ensuring the stable flow of raw materials in the nozzle in the heat flow cavity 12.

[0025] At the same time, by combining the heat flow pipe 15 arranged at the outer end of the positioning pipe 4, the heat energy of the pipeline is used to affect the outer end of the positioning pipe 4, and the opening and closing of the shut-off valve pipe 13 and the valve pipe head 14 are coordinated to carry out the interception and transportation of a single positioning pipe 4 section, thereby facilitating the diversion control of the heat flow and improving the operability of the component;

[0026] Compared with traditional hot runner components, this component takes into account the bottle cap injection molding mold and nozzle structure. Due to the shallow mold cavity and nozzle structure, the pipeline extends inward, making the exposed pipe section difficult to heat-seal. The internal and external combined hot flow cavity 12 and heat flow tube 15 structure ensures the uniform temperature stability of the nozzle in each pipe section, thereby improving the practicality of the component.

[0027] Preferably, a heat insulating block 2 is axially passed through the middle of the hot runner plate 1. The heat insulating block 2 is provided as a separation contact structure between the hot runner plate 1 and the fixed mold in the mold closing state, thereby avoiding mutual influence of heat conduction between the molds.

[0028] Preferably, an inwardly concave L-shaped step surface is formed on the outer end edge of the limiting tube ring 7 and the positioning tube 4, and the limiting tube ring 7 is used to axially limit the connecting end of the positioning tube 4 and the hot nozzle 3. At the same time, the L-shaped step surface is used to block and encapsulate the nozzle groove 8 to ensure the heat sealing stability of the nozzle groove 8 and its nozzle structure.

[0029] Preferably, the heat flow cavity 12 is an inwardly concave arch surface structure, and a plurality of annular mesh rings 11 are provided around the inner end of the heat flow cavity 12, and the annular mesh rings 11 are filled with high thermal conductivity materials. The arch surface structure is combined with the annular mesh rings 11 filled therein to improve the heat conduction efficiency of the heat flow cavity 12 to the nozzle groove 8 end.

[0030] Preferably, a plurality of heat-insulating spherical columns are separated between the flow channel row 10 and the outer wall of the hot nozzle 3, and the heat-insulating structure is further used to separate and connect the flow channel row 10 and the hot nozzle 3 structure to slow down the outward loss of heat energy of the heat medium.

[0031] Preferably, the hot runner plate 1 is embedded with a sealing copper ring 5 at the outer end of the heat flow tube 15 , and the heat flow tube 15 is further sealed to the surface of the hot runner plate 1 through the sealing copper ring 5 .

[0032] Preferably, a pair of valve needle tubes 6 are provided through both ends of the heat flow tube 15, and the valve needle tubes 6 are externally provided on both sides of the hot runner plate 1. When the heat source medium of the heat flow tube 15 circulates through the heat flow tube 15, the heat source medium in the heat flow tube 15 can be cut off by the externally provided valve needle tubes 6, thereby facilitating the flow management of the heat source medium.

[0033] Preferably, a gasket is filled between the shut-off valve tube 13 and the positioning tube 4. The shut-off valve tube 13 is controlled by an electrical signal. The shut-off valve tube 13 is controlled by an electromagnetic valve so as to transfer the heat source medium in the heat flow tube 15 to the local positioning tube 4, thereby facilitating the diversion control of the heat source medium.

[0034] The embodiment of the device is:

[0035] The docking structure between the hot nozzle 3 and the positioning tube 4 in this assembly corresponds to the end of the nozzle structure. The nozzle structure will be inserted into the nozzle groove 8 of the hot nozzle 3 by means of plugging and docking. The raw material will flow through the nozzle structure, through the outer end of the positioning tube 4 and the hot nozzle 3 in sequence, and finally be injected into the mold cavity at the end of the hot nozzle 3.

[0036] During the process, the heat flow pipe 15 provided at the outer end of the positioning pipe 4 is combined to utilize the heat source medium flowing through the heat flow pipe 15 to affect the outer end of the positioning pipe 4 with its pipeline heat energy. The shut-off valve pipe 13 and the valve pipe head 14 are opened and closed to intercept and transport the single positioning pipe 4 section, and the heating and uniform temperature control of the local pipeline is carried out for each nozzle.

[0037] Then, through the contact between the hot flow cavity 12 and the end of the nozzle structure, the external heat source tube 9 is utilized to provide the heat source medium to the end of the hot flow cavity 12 along the flow channel row 10. The heat source medium contacts the cavity wall of the hot flow cavity 12 through the annular mesh ring 11 in the hot flow cavity 12 to exchange heat, so as to ensure the stable flow of the raw material in the nozzle in the hot flow cavity 12.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A combined bottle cap injection mold hot runner assembly, comprising a hot runner plate (1), characterized in that: The hot runner plate (1) is equipped with a plurality of positioning tubes (4), and each positioning tube (4) is provided with a hot nozzle (3) in a plugged manner. A limiting tube ring (7) is encapsulated at the connection end between the hot nozzle (3) and the positioning tube (4), and a heat source tube (9) is externally connected between the limiting tube ring (7) and the hot nozzle (3). A nozzle groove (8) is formed between the hot nozzle (3) and the limiting tube ring (7), and the hot nozzle (3) is provided with a separated hot flow cavity (12) inwardly concave at one end of the nozzle groove (8), and a runner row (10) is provided between the hot flow cavity (12) and the heat source tube (9); A heat flow pipe (15) is arranged around the outer side of the inner end of the positioning pipe (4), and a shut-off valve pipe (13) is sleeved between the heat flow pipe (15) and the outer side of the positioning pipe (4), and a valve pipe head (14) is arranged between the shut-off valve pipe (13) and the positioning pipe (4).

2. The combined hot runner assembly for a bottle cap injection mold according to claim 1, characterized in that: A heat insulation block (2) axially penetrates the middle of the hot runner plate (1).

3. The combined hot runner assembly for a bottle cap injection mold according to claim 1, characterized in that: The outer end edges of the limiting pipe ring (7) and the positioning pipe (4) are connected to form an inwardly concave L-shaped step surface.

4. The combined hot runner assembly for a bottle cap injection mold according to claim 1, characterized in that: The heat flow cavity (12) is an inwardly concave arch surface structure, and the inner end of the heat flow cavity (12) is provided with a plurality of annular mesh rings (11), and the annular mesh rings (11) are filled with a high thermal conductivity material.

5. The combined hot runner assembly for a bottle cap injection mold according to claim 1, characterized in that: A plurality of heat-insulating spherical columns are separated between the flow channel row (10) and the outer wall of the hot nozzle (3).

6. The combined hot runner assembly for a bottle cap injection mold according to claim 1, characterized in that: The hot runner plate (1) is embedded with a sealing copper ring (5) at the outer end of the hot runner tube (15).

7. The combined hot runner assembly for a bottle cap injection mold according to claim 1, characterized in that: A pair of valve needle tubes (6) are provided through both ends of the heat flow tube (15), and the valve needle tubes (6) are externally provided on both sides of the hot runner plate (1).

8. The combined hot runner assembly for a bottle cap injection mold according to claim 1, characterized in that: A gasket is filled between the shutoff valve tube (13) and the positioning tube (4), and the shutoff valve tube (13) is controlled to open and close by an electrical signal.

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