Independent injection mold with multiple thin walls

Abstract

The utility model provides an independent injection mold with multiple thin walls, which comprises an upper mold, a lower mold and a plurality of sub-mold core components arranged between the upper mold and the lower mold, each sub-mold core component comprises a lower mold core fixed on the lower mold and an upper mold core fixed on the upper mold, the upper end of each lower mold core is vertically provided with a boss, and the lower end of each boss is provided with an upper mold core. The lower end of the upper mold core is provided with a boss, the lower end of the upper mold core is provided with a concave cavity, a forming cavity used for forming a thin-wall product is formed between the concave cavity and the boss, cooling pipelines are arranged in the upper mold core and the lower mold core, an annular main air channel is formed in the boss, the main air channel is connected with a compressed air source through an air flow channel, and the main air channel is communicated with the compressed air source. An annular air outlet groove is formed in the side wall of the boss, the air outlet groove is communicated with the main air channel and used for assisting discharging, and the width H of the air outlet groove is smaller than or equal to 0.02 mm. The independent injection mold with the multiple thin walls is compact in structure, convenient to machine, low in production cost and maintenance cost, good in discharging effect and high in product quality.

Description

Technical Field

[0001] The utility model relates to a mould, in particular to a thin-walled multi-outlet independent injection mould. Background Art

[0002] In order to improve production efficiency, the injection molds currently on the market have multi-cavity injection molds that can simultaneously injection mold multiple products. The existing molds have multiple cavities processed on the template, which has high processing costs and is inconvenient to maintain. When damaged, the entire template will be scrapped; at the same time, for thin products, the traditional ejector mechanism is very easy to damage the product. Utility Model Content

[0003] Technical issues to be solved

[0004] The technical problem to be solved by the utility model is to provide a thin-walled multi-outlet independent injection mold which has compact structure, convenient assembly, low manufacturing cost and maintenance cost and good discharging effect.

[0005] Technical solutions to the problem

[0006] The utility model provides a thin-walled multi-outlet independent injection mold, which comprises an upper mold 11, a lower mold 12 and a plurality of sub-core assemblies arranged between the upper mold 11 and the lower mold 12, the sub-core assemblies comprising a lower core 4 fixed on the lower mold and an upper core 3 fixed on the upper mold, a boss is vertically arranged at the upper end of the lower core 4, a concave cavity is arranged at the lower end of the upper core 3, a molding cavity for molding a thin-walled product is formed between the concave cavity and the boss, cooling pipelines are arranged in the upper core 3 and the lower core 4, an annular main air channel 404 is formed in the boss, the main air channel 404 is connected to a compressed air source through a gas flow channel 403, a side wall of the boss is provided with an annular air outlet groove, the air outlet groove is communicated with the main air channel 404 and is used for auxiliary discharge, and the width H of the air outlet groove is less than or equal to 0.02mm.

[0007] Furthermore, the boss includes a first boss 41 and a second boss 5 installed on the top of the first boss 41, the first boss 41 is flush with the outer wall of the second boss 5 and forms a first molding surface, the top surface of the first boss 41 or the bottom surface of the second boss 5 is provided with an annular groove and forms the main air duct 404, and there is a gap between the top surface of the first boss 41 and the bottom surface of the second boss 5 located outside the main air duct 404, and the air outlet groove is formed.

[0008] Furthermore, the top surface of the first boss 41 and the bottom surface of the second boss 5 are perpendicular to the axis of the boss.

[0009] Furthermore, the air outlet groove is arranged above the side wall of the boss.

[0010] Furthermore, the ratio of the distance from the air outlet groove to the bottom surface of the boss to the distance from the air outlet groove to the top surface of the boss is greater than or equal to 5 and less than or equal to 10.

[0011] Furthermore, a width H of the air outlet groove is greater than or equal to 0.005 mm and less than or equal to 0.01 mm.

[0012] Furthermore, a positioning shaft 51 is provided at the center of the lower end of the second boss 5 , and an axial hole capable of accommodating the positioning shaft 51 to be inserted and realize positioning is provided at the center of the top surface of the first boss 41 .

[0013] Furthermore, a plurality of first medium flow channels 400 are evenly distributed in the circumferential direction of the first boss 41, the upper end of the first medium flow channel 400 passes through the top surface of the first boss 41 and is located on the inner side of the main air channel, a plurality of first connecting cavities 500 are provided on the bottom surface of the second boss 5, a plurality of second connecting cavities 401 are provided on the bottom of the first boss 41, a first reciprocatingly curved first cooling pipeline is formed between the first connecting cavity 500, the second connecting cavity 401 and the first medium flow channel 400, and the side wall of the lower core 4 is provided with a first liquid inlet 400a and a first liquid outlet 400b respectively connected to the two ends of the first cooling pipeline.

[0014] Furthermore, a sealing ring is provided between the top surface of the first boss 41 and the bottom surface of the second boss 5 , and the sealing ring is located between the first medium flow channel 400 and the main air channel.

[0015] Furthermore, the top surface of the lower core 4 is concave inward to form a cavity, the boss is arranged at the center of the bottom surface of the cavity, the side wall of the cavity is an inclined surface and forms a first positioning surface, the bottom surface of the upper core 3 is convex downward to form a protrusion that can be inserted into the cavity, the concave cavity is opened on the bottom surface of the protrusion, and the side wall of the protrusion can fit the first positioning surface and form a second positioning surface.

[0016] Beneficial Effects

[0017] The utility model discloses a thin-walled, multi-outlet independent injection mold, which is provided with a plurality of independent sub-core components, and can realize the independent molding of a plurality of products, greatly reducing the processing difficulty and processing cost, and is convenient for maintenance and servicing, and has a low repair cost; the arrangement of an air outlet groove can realize auxiliary discharging, improve the discharging efficiency and reliability, avoid damage to thin products, and have a good discharging effect; the adoption of a split structure is convenient for processing and assembly, with high precision and low cost; the cooling flow channel is optimized in design, which is convenient for processing and has a good cooling effect; the utility model discloses a thin-walled, multi-outlet independent injection mold, which has a compact structure, is convenient for processing, has low production cost and maintenance cost, has a good discharging effect, and has a high product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a thin-walled, multi-independent injection mold of the utility model;

[0019] Figure 2 It is a schematic diagram of the exploded structure of the thin-walled multi-independent injection mold of the utility model;

[0020] Figure 3 It is a structural schematic diagram of a sub-core assembly of a thin-walled multi-independent injection mold of the utility model;

[0021] Figure 4 It is a cross-sectional view of a sub-core assembly of a thin-walled multiple independent injection mold of the utility model;

[0022] Figure 5 Another planar cross-sectional view of the sub-core assembly of the thin-walled multiple independent injection mold of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the second boss of the thin-walled multi-independent injection mold of the utility model;

[0024] Figure 7 It is a structural schematic diagram of the lower core of the thin-walled multi-independent injection mold of the utility model;

[0025] Figure 8 It is another perspective structural diagram of the lower core of the thin-walled multiple independent injection mold of the utility model;

[0026] Fig. 9 for Figure 8 Enlarged view of part A in the middle;

[0027] Fig.10 It is a cross-sectional view of the lower core of the thin-walled multiple independent injection mold of the utility model;

[0028] Fig.11 for Fig.10 Enlarged view of middle part B;

[0029] Fig.12 It is a transverse cross-sectional view of a sub-core component of a thin-walled multiple independent injection mold of the utility model. DETAILED DESCRIPTION

[0030] The following is a detailed description of the embodiments of the present utility model in conjunction with the accompanying drawings.

[0031] See also Figure 1-Figure 12 The utility model provides a thin-walled multi-outlet independent injection mold, which includes an upper mold 11 and a lower mold 12. A sub-core component is arranged between the upper mold 11 and the lower mold 12. The sub-core components are multiple and arranged in sequence. A cavity is provided in each sub-core component, which can realize independent molding of products.

[0032] The sub-core assembly includes an upper core 3 and a lower core 4. The upper core 3 is mounted on an upper mold 11, and the lower core 4 is mounted on a lower mold 12. The relative movement between the upper core 3 and the lower core 4 is realized by the relative movement of the upper mold and the lower mold, that is, the mold opening and closing are realized. A boss is vertically arranged at the upper end of the lower core 4. The cross section of the boss is circular, and its side wall is an inclined surface, forming a frustum structure with a small upper end and a large lower end. A concave cavity is arranged at the lower end of the upper core 3, and a molding cavity is formed between the concave cavity and the boss. The molding cavity is used for molding thin-walled products. In the present application, an annular main airway 404 is formed in the boss, and the plane where the main airway 404 is located is perpendicular to the axis of the boss. An air inlet 403a is arranged on the side wall of the lower core 4. The air inlet 403a is used to connect to a compressed air source. At the same time, a gas flow channel 403 is formed in the lower core, and the main air channel 404 is connected to the air inlet 403a through the gas flow channel 403 for air intake. At the same time, an annular air outlet groove is provided on the side wall of the boss. The air outlet groove is connected to the main air channel 404 and is used for auxiliary discharge of the product. The width H of the air outlet groove is less than or equal to 0.02 mm. In this embodiment, the (axial) width H of the air outlet groove is greater than or equal to 0.005 mm and less than or equal to 0.01 mm. The air outlet groove is arranged at the upper position of the side wall of the boss. Specifically, the ratio of the distance from the air outlet groove to the bottom surface of the boss to the distance from the air outlet groove to the top surface of the boss is greater than or equal to 5 and less than or equal to 10.

[0033] In order to reduce the difficulty of processing and ensure its overall accuracy, in this embodiment, the boss includes a first boss 41 and a second boss 5. The second boss 5 is installed on the top of the first boss 41. The outer wall of the first boss 41 is flush with the outer wall of the second boss 5, thereby forming a first molding surface, and the top surface of the first boss 41 and the bottom surface of the second boss 5 are both perpendicular to the axis of the boss. It adopts a split structure, which is easy to process and can improve the overall processing accuracy. An annular groove is provided on the top surface of the first boss 41 or on the bottom surface of the second boss 5 to form a main airway 404. The air outlet groove is located on the outside of the main airway 404. Specifically, there is a gap between the top surface of the first boss 41 located on the outside of the main airway 404 and the bottom surface of the second boss 5 (located on the outside of the main airway 404), which forms For the convenience of processing and controlling the width of the gap, an annular groove is arranged on the top surface of the first boss 41, and the top surface part (of the first boss) located on the outside of the annular groove is machined at the same time. The cutting depth forms a gap between the top surface of the first boss and the bottom surface of the second boss, that is, the air outlet groove is formed. Through the above-mentioned split structure, processing is convenient, cost-effective, and the width of the air outlet groove can be accurately controlled with high precision. A positioning shaft 51 is provided at the center of the lower end of the second boss 5. The side wall of the positioning shaft 51 is an inclined surface to form a tapered shaft. At the same time, an axial hole is provided at the center of the top surface of the first boss 41. The side wall of the axial hole is also an inclined surface with the same inclination as the positioning shaft, so as to accommodate the insertion of the positioning shaft 51. After the insertion is complete, the side walls fit together, thereby realizing the positioning and installation of the two.

[0034] The ratio of the distance from the above-mentioned air outlet groove to the bottom surface of the boss to the distance from the air outlet groove to the top surface of the boss is the height ratio of the first boss 41 to the second boss 5. Since the side wall of the boss has a certain slope, in order to improve the discharge efficiency and effect, the air outlet groove is set at an upper position.

[0035] The lower core 4 is a rectangular structure as a whole, and preferably, its cross-section is square. The top surface of the lower core 4 is concave inward to form a cavity. The side wall of the cavity is an inclined surface to form a first positioning surface. The boss is vertically arranged at the center of the bottom surface of the cavity. The cross-sectional shape and size of the upper core 3 are the same as the shape and size of the lower core. The bottom surface of the upper core 3 is convex downward to form a convex structure, which can be inserted into the cavity. The height of the convexity is the same as the depth of the cavity, and the concave cavity is opened at the center of the bottom surface of the convexity. The side wall of the convexity serves as the second positioning surface, which can be attached to the first positioning surface when the mold is closed, thereby realizing the mold closing positioning, which can improve the accuracy and strength when the mold is closed, thereby ensuring the quality of the product.

[0036] A plurality of first medium flow channels 400 are uniformly distributed in the circumferential direction of the first boss 41. In this embodiment, there are an even number of them, preferably 6 to 10, and their length direction is parallel to the side wall of the first boss. The upper end of the first medium flow channel 400 passes through the top surface of the first boss 41, and at the same time, it is located on the inner side of the main air channel. At the same time, a plurality of first connecting cavities 500 are provided on the bottom surface of the second boss 5, which are half the number of the first medium flow channels, and are arranged at intervals to connect two adjacent first medium flow channels 400 in an interval manner to form a plurality of U-shaped pipeline structures facing in different directions. A plurality of second connecting cavities 500 are provided at the bottom of the first boss 41. The connecting cavity 401 and the second connecting cavity 401 are also arranged at intervals and staggered with the first connecting cavity 500, connecting two adjacent first medium flow channels 400 in an interval manner. For the convenience of processing, a second connecting groove is opened at the bottom of the first boss to form a second connecting cavity with the lower mold, and a reciprocating first cooling pipeline is formed between the first connecting cavity 500, the second connecting cavity 401 and the first medium flow channel 400; at the same time, a first liquid inlet 400a and a first liquid outlet 400b are provided on the side wall of the lower core 4, which are respectively connected to the two ends of the first cooling pipeline for the inlet and outlet of the cooling medium.

[0037] The first cooling pipeline is described below by way of example:

[0038] There are six first medium flow channels 400, and there are three first connecting cavities, which are evenly distributed in the circumferential direction. The first connecting cavity connects the first to the second, the third to the fourth, and the fifth to the sixth. There are two second connecting cavities at the lower end, which connect the second to the third, and the fourth to the fifth, thereby forming a reciprocating cooling channel. The first liquid inlet is connected to the first, and the first liquid outlet is connected to the fifth. The processing is convenient and labor-saving, which greatly reduces the processing cost, and at the same time can ensure the cooling effect and efficiency.

[0039] At the same time, a sealing ring is provided between the top surface of the first boss 41 and the bottom surface of the second boss 5. The sealing ring is located between the first medium flow channel 400 (pitch circle) and the main air channel. The sealing ring is coaxially arranged with the boss. Since an axial hole is provided on the first boss, a sealing ring is also provided on the inner side of the first medium flow channel (pitch circle) to ensure the sealing of the cooling medium. In this embodiment, a sealing ring mounting groove 410 is opened on the top surface of the first boss, which is coaxial with the boss. There are two of them, and they are respectively arranged on the inner and outer sides of the pitch circle of the first medium flow channel 400, and the sealing ring is installed in the sealing ring mounting groove.

[0040] A second cooling pipeline is formed in the upper mold core 3. Specifically, the cross section of the protrusion on the upper mold core is a regular polygon, and a second medium flow channel 300 is opened on each surface thereof. Two adjacent ones are connected to each other to form a pipeline, and the end thereof is not connected. The two ends are used for liquid inlet and liquid outlet respectively. Fig.12 It adopts a multi-layer structure, that is, second medium flow channels are opened on different radial surfaces, and then the pipelines on different radial surfaces are connected through axial pipelines. A second liquid inlet 300a and a second liquid outlet 300b are arranged on the side wall of the upper core 3, and are respectively connected with the two ends of the pipeline to form a second cooling pipeline; a plurality of sealing plates 6 are arranged on the raised side wall, which seal the open end of the second medium flow channel to form an internal pipeline. It is easy to process and has low cost.

[0041] In this embodiment, the upper end of the concave cavity on the upper core is open, and a core block 2 is arranged at the open end. The bottom surface of the core block serves as the molding surface, and a feed port 20 is opened on the top of the core block. At the same time, a third medium flow channel is arranged in the core block, and a third liquid inlet 201 and a third liquid outlet 202 connected to the two ends of the third medium flow channel are opened on the side wall of the core block.

[0042] The utility model discloses a thin-walled, multi-outlet independent injection mold, which is provided with a plurality of independent sub-core components, and can realize the independent molding of a plurality of products, greatly reducing the processing difficulty and processing cost, and is convenient for maintenance and servicing, and has a low repair cost; the arrangement of an air outlet groove can realize auxiliary discharging, improve the discharging efficiency and reliability, avoid damage to thin products, and have a good discharging effect; the adoption of a split structure is convenient for processing and assembly, with high precision and low cost; the cooling flow channel is optimized in design, which is convenient for processing and has a good cooling effect; the utility model discloses a thin-walled, multi-outlet independent injection mold, which has a compact structure, is convenient for processing, has low production cost and maintenance cost, has a good discharging effect, and has a high product quality.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A thin-walled, multi-outlet independent injection mold, characterized in that: It includes an upper mold, a lower mold and a plurality of sub-core assemblies arranged between the upper mold and the lower mold, the sub-core assembly includes a lower core fixed on the lower mold and an upper core fixed on the upper mold, a boss is vertically arranged on the upper end of the lower core, a concave cavity is arranged on the lower end of the upper core, a molding cavity for molding thin-walled products is formed between the concave cavity and the boss, cooling pipelines are arranged in the upper core and the lower core, an annular main air channel is formed in the boss, the main air channel is connected to a compressed air source through a gas flow channel, a side wall of the boss is provided with an annular air outlet groove, the air outlet groove is connected to the main air channel and is used for auxiliary discharge, and the width H of the air outlet groove is less than or equal to 0.02mm.

2. The thin-walled multiple independent injection mold according to claim 1, characterized in that: The boss includes a first boss and a second boss installed on the top of the first boss. The first boss is flush with the outer wall of the second boss and forms a first molding surface. The top surface of the first boss or the bottom surface of the second boss is provided with an annular groove and forms the main air duct. There is a gap between the top surface of the first boss and the bottom surface of the second boss located outside the main air duct and forms the air outlet groove.

3. The thin-walled multiple independent injection mold according to claim 2, characterized in that: The top surface of the first boss and the bottom surface of the second boss are perpendicular to the axis of the boss.

4. The thin-walled multiple independent injection mold according to claim 1, characterized in that: The air outlet groove is arranged above the side wall of the boss.

5. The thin-walled multiple independent injection mold according to claim 4, characterized in that: The ratio of the distance from the air outlet groove to the bottom surface of the boss to the distance from the air outlet groove to the top surface of the boss is greater than or equal to 5 and less than or equal to 10.

6. The thin-walled multiple independent injection mold according to claim 1, characterized in that: The width H of the air outlet groove is greater than or equal to 0.005 mm and less than or equal to 0.01 mm.

7. The thin-walled multiple independent injection mold according to claim 2, characterized in that: A positioning shaft is arranged at the center of the lower end of the second boss, and an axis hole capable of accommodating the positioning shaft to be inserted and realize positioning is arranged at the center of the top surface of the first boss.

8. The thin-walled multiple independent injection mold according to claim 2, characterized in that: A plurality of first medium flow channels are evenly distributed in the circumferential direction of the first boss, the upper end of the first medium flow channel passes through the top surface of the first boss and is located on the inner side of the main air channel, a plurality of first connecting cavities are provided on the bottom surface of the second boss, a plurality of second connecting cavities are provided on the bottom of the first boss, a first reciprocatingly curved first cooling pipeline is formed between the first connecting cavity, the second connecting cavity and the first medium flow channel, and a first liquid inlet and a first liquid outlet are provided on the side wall of the lower core respectively connected to the two ends of the first cooling pipeline.

9. The thin-walled multiple independent injection mold according to claim 8, characterized in that: A sealing ring is provided between the top surface of the first boss and the bottom surface of the second boss, and the sealing ring is located between the first medium flow channel and the main air channel.

10. The thin-walled multiple independent injection mold according to claim 1, characterized in that: The top surface of the lower core is concave inward to form a cavity, the boss is arranged at the center of the bottom surface of the cavity, the side wall of the cavity is an inclined surface and forms a first positioning surface, the bottom surface of the upper core is convex downward to form a protrusion that can be inserted into the cavity, the concave cavity is opened on the bottom surface of the protrusion, and the side wall of the protrusion can fit the first positioning surface and form a second positioning surface.

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