Material injection device for household appliance foaming mold

Abstract

The utility model relates to the technical field of foaming mould material injection, in particular to a material injection device for a household appliance foaming mould, which comprises a material storage box, a material injection pump is fixedly arranged on one side of the material storage box, the output end of the material injection pump is fixedly connected with a material injection pipe, one end of the material injection pipe is fixedly provided with a connecting end, and the outer side of the connecting end is provided with an external thread. The connecting end is in threaded connection with a silica gel discharging head, the outer side of the silica gel discharging head is sleeved with a metal discharging head, the silica gel discharging head comprises a threaded sleeve, a circular groove is formed in the top end of the threaded sleeve, and a threaded connecting hole is formed in the circular groove. And after material injection is completed, the glue injection pump is closed through an external control system, and the glue injection pump is set to reversely rotate and suck back for one second before being closed through the control system, so that when the interior of the duckbilled silica gel head loses extrusion force, the duckbilled silica gel head can quickly restore to the original shape, the effect of quickly closing the discharge port is achieved, the problem of leakage of the foaming material is greatly relieved, and the material injection effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of foam mold injection technology, specifically an injection device for foam molds used in household appliances. Background Technology

[0002] Foaming mold injection devices have a wide range of applications and can be used in the production of various foamed products, such as polyurethane foam and polystyrene foam. In industries such as building insulation, furniture manufacturing, automotive interiors, and packaging materials, they can precisely inject foaming raw materials into molds, achieving efficient and high-quality product molding and meeting the needs of different fields for foamed products.

[0003] As disclosed in CN211917492U, an injection device for foaming molds in household appliances includes a storage tank, a connector, and a fixed pipe. An injection pump is installed on one side of the storage tank, and the outlet of the injection pump is connected to a connecting pipe. A water pipe connector is installed on one side of the connector, and the water pipe connector is fixedly connected to one end of the connecting pipe. An injection gun head is provided on the other side of the connector. A threaded sleeve is fitted onto the outside of the fixed pipe, and the threaded sleeve is threadedly connected to the connector. Spring holes are provided on the inner walls of both sides of the fixed pipe, and springs and spring blocks are provided inside the two spring holes. A connecting groove is provided on the side of the two spring blocks that are close to each other. This utility model has a reasonable structure, ingenious design, and simple operation. It can prevent residual liquid from the injection gun head from dripping onto the ground, and solves the shortcomings of existing injection devices for foaming molds in household appliances that lack the ability to handle residual material at the injection gun nozzle.

[0004] While the aforementioned solution prevents residual liquid from the injection nozzle from dripping onto the ground, addressing the lack of a proper treatment method for residual material at the injection nozzle in injection devices for appliance foaming molds, the device requires the injection nozzle to be removed from the fixing tube after injection to achieve the anti-drip effect. This process easily leads to residual material dripping onto the worktable or ground. Furthermore, the device requires repeated disassembly and reassembly of the injection nozzle during cyclical injection operations, increasing downtime and hindering operational efficiency. Therefore, we propose an injection device for appliance foaming molds that solves the problems of easily dripping residual material from the nozzle and the need for repeated disassembly and reassembly, improving the device's practicality and ease of use. Utility Model Content

[0005] The purpose of this utility model is to provide an injection device for foaming molds of household appliances to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An injection device for foaming molds for household appliances includes a storage tank. An injection pump is fixedly installed on one side of the storage tank. An injection pipe is fixedly connected to the output end of the injection pump through a connecting pipe. A connecting end is fixedly provided at one end of the injection pipe. An external thread is provided on the outside of the connecting end. A silicone discharge head is threadedly connected to the connecting end. A metal discharge head is fitted on the outside of the silicone discharge head.

[0008] Furthermore, the silicone discharge head includes a threaded sleeve with a circular groove at its top and a threaded connection hole inside the circular groove. An annular sealing gasket is fixedly installed inside the circular groove. Handles are fixedly installed on both sides of the threaded sleeve, and rubber anti-slip sleeves are fitted on the outer sides of the handles. A cylindrical tube is fixedly connected to the bottom of the circular groove, and a duckbill-shaped silicone head is fixedly connected to the bottom of the cylindrical tube. The duckbill-shaped silicone head is inserted into the metal discharge head. The lower outer wall of the cylindrical tube has external threads, and an annular connection groove is provided at the bottom of the threaded sleeve.

[0009] Furthermore, a threaded connector is fixedly provided at the top of the metal discharge head, and the threaded connector is threadedly connected to the lower end of the cylindrical tube.

[0010] Furthermore, the input end of the injection pump is connected to the inside of the storage tank through a pipe, and the output end of the injection pump is fixedly connected to a connecting pipe, with a regulating valve installed on the outside of the connecting pipe.

[0011] Furthermore, a liquid level window is provided on the outer wall of the storage tank, and a filling port is fixedly provided on the top of the storage tank. The filling pump is electrically connected to an external control system.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This is an injection device for foaming molds used in household appliances. Through a silicone outlet head installed at one end of the injection tube, during the injection process, an injection pump pumps foaming material into a duckbill-shaped silicone head, causing the duckbill-shaped silicone head to be squeezed and expanded, fitting against the inner wall of a metal outlet head to achieve the injection effect. After the injection pump is turned off, utilizing the elasticity and memory properties of silicone, combined with the reverse suction effect of the injection pump, the duckbill-shaped silicone head can quickly return to its original shape and close, thus greatly reducing the problem of foaming material dripping and minimizing material residue inside the injection port. Furthermore, this device does not require repeated disassembly and assembly during use, shortening work intervals, reducing the workload of workers, and improving production efficiency.

[0014] 2. This injection device for foaming molds in household appliances, by connecting the connecting end to the silicone discharge head with a threaded connection, and the metal discharge head to the threaded sleeve with a threaded connection, allows the device to reduce operating costs by replacing only the silicone discharge head when the duckbill-shaped silicone head ages after long-term use, rather than replacing the entire device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partial structural schematic diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the internal structure of the silicone discharge head of this utility model;

[0018] Figure 4 This utility model Figure 1 Enlarged diagram of point A in the middle.

[0019] In the diagram: 1. Storage tank; 11. Liquid level window; 12. Injection port; 2. Injection pump; 3. Connecting pipe; 31. Regulating valve; 4. Injection pipe; 5. Connecting end; 6. Silicone discharge head; 61. Threaded sleeve; 62. Circular groove; 63. Threaded connection hole; 64. Annular sealing gasket; 65. Handle; 66. Rubber anti-slip sleeve; 67. Cylindrical cylinder; 68. Duckbill-shaped silicone head; 69. Annular connecting groove; 7. Metal discharge head; 71. Threaded connector. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Example: An injection device for foaming molds used in home appliances, such as... Figures 1-4As shown, the system includes a storage tank 1, a material injection pump 2 fixedly installed on one side of the storage tank 1, a material injection pipe 4 fixedly connected to the output end of the material injection pump 2 via a connecting pipe 3, a connecting end 5 fixedly provided at one end of the material injection pipe 4, an external thread provided on the outside of the connecting end 5, a silicone discharge head 6 threadedly connected to the connecting end 5, a metal discharge head 7 fitted on the outside of the silicone discharge head 6, the input end of the material injection pump 2 communicating with the inside of the storage tank 1 via a pipe, the output end of the material injection pump 2 fixedly connected to the connecting pipe 3, a regulating valve 31 installed on the outside of the connecting pipe 3, a liquid level window 11 opened on the outer wall of the storage tank 1, a material injection port 12 fixedly provided at the top of the storage tank 1, and the material injection pump 2 electrically connected to an external control system.

[0023] In this embodiment, during injection, the foaming material is first injected into the storage tank 1 through the injection port 12 fixed at the top of the storage tank 1. The operator can judge the liquid level inside the storage tank 1 in real time by observing the liquid level window 11. Then, the regulating valve 31 is opened, and the injection pump 2 is started through the external control system, so that the foaming material inside the storage tank 1 is pumped into the silicone discharge head 6 through the injection pipe 4 and sprayed out, so as to achieve the mold injection effect.

[0024] like Figures 1-3 As shown, the silicone discharge head 6 includes a threaded sleeve 61, a circular groove 62 at the top of the threaded sleeve 61, a threaded connection hole 63 inside the circular groove 62, an annular sealing gasket 64 fixedly installed inside the circular groove 62, handles 65 fixedly installed on both sides of the threaded sleeve 61, rubber anti-slip sleeves 66 sleeved on the outside of the handles 65, a cylindrical tube 67 fixedly connected to the bottom of the circular groove 62, a duckbill-shaped silicone head 68 fixedly connected to the bottom of the cylindrical tube 67, the duckbill-shaped silicone head 68 inserted into the metal discharge head 7, an external thread on the outer wall of the lower end of the cylindrical tube 67, an annular connection groove 69 at the bottom of the threaded sleeve 61, and a threaded connector 71 fixedly installed at the top of the metal discharge head 7, the threaded connector 71 being threadedly connected to the lower end of the cylindrical tube 67.

[0025] In this embodiment, the circular groove 62 at the top of the threaded sleeve 61 is aligned with the connecting end 5, and the threaded sleeve 61 is rotated to make it threadedly connected and tightened with the connecting end 5. Then, the threaded connector 71 at the top of the metal outlet head 7 is aligned with the annular connecting groove 69 at the bottom of the threaded sleeve 61. At the same time, the duckbill-shaped silicone head 68 is inserted into the corresponding conical cavity inside the metal outlet head 7, and the metal outlet head 7 is rotated to make the metal outlet head 7 and the threaded sleeve 61 threadedly connected and tightened. The duckbill-shaped silicone head 68 is closed and flat in the non-operating state. However, during the injection operation, due to the extrusion of the material, it is opened into a conical shape and fits against the inner wall of the metal outlet head 7. After the injection is completed, the injection pump 2 is turned off by the external control system, and the injection pump 2 is set to reverse and suck back for one second before turning off. This allows the duckbill-shaped silicone head 68 to quickly return to its original shape when the extrusion pressure is lost, achieving a rapid closing effect of the outlet and reducing the leakage problem of the foam material.

[0026] In this embodiment, the foaming material injection device for a household appliance foaming mold is first injected into the storage tank 1 through the injection port 12 fixed at the top of the storage tank 1. The operator can judge the liquid level inside the storage tank 1 in real time by observing the liquid level window 11. Then, the circular groove 62 at the top of the threaded sleeve 61 is aligned with the connecting end 5, and the threaded sleeve 61 is rotated to make it threadedly connected and tightened with the connecting end 5. Then, the threaded connector 71 at the top of the metal discharge head 7 is aligned with the annular connecting groove 69 at the bottom of the threaded sleeve 61. At the same time, the duckbill-shaped silicone head 68 is inserted into the corresponding conical cavity inside the metal discharge head 7, and the metal discharge head 7 is rotated to make the metal discharge head 7 and the threaded sleeve 61 threadedly connected and tightened. The duckbill-shaped silicone head 68 is closed and flat in the non-operating state, but in the operating state, due to the extrusion of the material, it is opened into a conical shape and fits against the inner wall of the metal discharge head 7. Finally, the regulating valve 31 is opened, and the injection pump 2 is started through the external control system. This allows the foaming material inside the storage tank 1 to be pumped into the silicone outlet head 6 through the injection pipe 4, achieving the mold injection effect. After the injection is completed, the injection pump 2 is turned off through the external control system. The control system is also set to reverse and suck back for one second before turning off the injection pump 2. This allows the duckbill-shaped silicone head 68 to quickly return to its original shape when the extrusion pressure is lost, achieving a rapid closing effect of the outlet. This greatly reduces the problem of foaming material dripping and improves the injection effect.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A material injection device for foaming molds in household appliances, comprising a material storage tank (1), characterized in that: A material pump (2) is fixedly installed on one side of the storage tank (1). The output end of the material pump (2) is fixedly connected to a material pipe (4) through a connecting pipe (3). A connecting end (5) is fixedly provided at one end of the material pipe (4). An external thread is provided on the outside of the connecting end (5). A silicone discharge head (6) is threadedly connected to the connecting end (5). A metal discharge head (7) is fitted on the outside of the silicone discharge head (6). The silicone discharge head (6) includes a threaded sleeve (61), the top of which is provided with a circular groove (62), and the inside of the circular groove (62) is provided with a threaded connection hole (63).

2. The injection device for foaming molds of household appliances according to claim 1, characterized in that: An annular sealing gasket (64) is fixedly installed inside the circular groove (62), and a handle (65) is fixedly provided on both sides of the threaded sleeve (61). A rubber anti-slip sleeve (66) is sleeved on the outside of the handle (65).

3. The injection device for foaming molds of household appliances according to claim 1, characterized in that: A cylindrical tube (67) is fixedly connected to the bottom end of the circular groove (62), and a duckbill-shaped silicone head (68) is fixedly connected to the bottom end of the cylindrical tube (67). The duckbill-shaped silicone head (68) is inserted into the metal discharge head (7), and the lower outer wall of the cylindrical tube (67) is provided with external threads.

4. The injection device for foaming molds of household appliances according to claim 1, characterized in that: The bottom end of the threaded sleeve (61) is provided with an annular connecting groove (69).

5. The injection device for foaming molds of household appliances according to claim 1, characterized in that: The top of the metal discharge head (7) is fixedly provided with a threaded connector (71), which is threadedly connected to the lower end of the cylindrical tube (67).

6. The injection device for foaming molds of household appliances according to claim 1, characterized in that: The input end of the injection pump (2) is connected to the inside of the storage tank (1) through a pipe. The output end of the injection pump (2) is fixedly connected to a connecting pipe (3). A regulating valve (31) is installed on the outside of the connecting pipe (3). A liquid level window (11) is opened on the outer wall of the storage tank (1). An injection port (12) is fixedly set at the top of the storage tank (1). The injection pump (2) is electrically connected to an external control system.

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