Taper balanced flow blowing and discharging device

Abstract

The invention provides a taper balanced flow blowing and discharging device, and relates to the technical field of mold processing, the taper balanced flow blowing and discharging device comprises a shell and an inner core, and the shell and the inner core are symmetrical about a longitudinal vertical plane passing through a central axis; the inner core comprises a head part and a cylinder part which are connected into a whole, the head part is provided with an air hole, and the center of the cylinder part is axially provided with an air passage; a first conical surface and a second conical surface are arranged on the periphery of the head position of the inner core, and a third conical surface is arranged on the inner wall of the shell; the vertical plane is respectively intersected with the first conical surface, the second conical surface and the third conical surface to form a first intersection line, a second intersection line and a third intersection line; the first intersecting line and the third intersecting line are parallel to each other to form an air blowing and exhausting gap which is communicated with the air hole. The air blowing and exhausting device has the beneficial effects that the consistency and the accuracy of the exhaust flow are favorably guaranteed, and meanwhile, the problems that a traditional air blowing and exhausting device is uneven in gap and unbalanced in exhaust are solved, so that the qualified rate of a precision mold during product production is increased, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mold processing, in particular to a taper balanced flow blowing device. Background Art

[0002] When precision molds such as injection molds, rubber molds, blow molds, and die-casting molds are producing products, it is necessary to quickly exhaust the air in the mold cavity. The mold exhaust plug is a mold accessory used to exhaust the air and other miscellaneous gases inside the mold to improve the quality of the mold product. It can also be called a honeycomb hole exhaust plug, a breathable plug, a vent plug, and a cylindrical exhaust plug. It is mainly used for exhausting low-pressure casting molds of non-ferrous metals and alloys such as aluminum alloys, copper, and tin, such as injection molding molds, gravity casting molds, vacuum casting molds, and low-pressure casting molds. The exhaust plugs have a variety of series such as honeycomb holes, grooves, porous, and mesh, and have been widely used in gravity casting, vacuum casting, injection molding and other processes.

[0003] However, the actual technical situation is that if the gap of the exhaust device is too large, glue leakage and overflow will occur, which may cause burrs on the product at the least and the product may be stuck in the mold cavity at the worst. If the gap of the exhaust device is too small, poor exhaust will occur, which will cause unsatisfactory product injection, product burning, product deformation, low production efficiency and other undesirable phenomena.

[0004] Chinese patent authorization announcement number CN209260446U discloses a special exhaust plug for paper plastic molds, and the disclosed content is: including an exhaust plug body; the exhaust plug body includes a column part and a terminal part connected in sequence along the axial direction of the exhaust plug body; the column part is a cylindrical structure, and the terminal part is a flat-headed conical structure, and the terminal part gradually converges to the end where the column part is located and is connected to the column part; the column part is provided with an external thread spirally surrounding the outer circumference of the column part; an air avoidance hole extending inward along the axial direction is provided at one end of the column part; an exhaust hole along the axial direction is provided on the terminal part, and the exhaust hole passes through the terminal part and is connected to the air avoidance hole. That is, the gas is discharged through the combined use of the exhaust hole and the air avoidance hole.

[0005] However, it is known from actual processing that due to processing errors and assembly errors, the size of such apertures is difficult to control, so that it is impossible to ensure that precision molds such as injection molds and blow molds can exhaust quickly and evenly without glue leakage when producing products. Therefore, the present invention discloses a tapered balanced flow blowing device to overcome the above defects. Summary of the invention

[0006] The present invention overcomes the shortcomings of the prior art and provides a tapered balanced flow blowing and exhausting device, which solves the problems of uneven gaps and uneven exhausting in traditional blowing and exhausting devices, thereby solving the problem of low pass rate of precision molds in the production of products and improving production efficiency.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: A conical balanced flow blowing device comprises an outer shell and an inner core installed in the outer shell, the central axes of the outer shell and the inner core coincide with each other, and the outer shell and the inner core are symmetrical about the longitudinal vertical plane passing through the central axis; the inner core comprises a head and a columnar portion connected as a whole, the head is provided with an air hole, and the central axis of the columnar portion is provided with an air passage, which extends upward to communicate with the air hole; the outer periphery of the head position of the inner core is provided with a first conical surface and a second conical surface, and the inner wall of the outer shell is provided with a third conical surface; the longitudinal vertical plane intersects with the first conical surface, the second conical surface, and the third conical surface to form a first intersection line, a second intersection line, and a third intersection line respectively; when the inner core and the outer shell are in an assembled use state, the second intersection line is tightly connected with the third intersection line, so that the second conical surface and the third conical surface cooperate with each other to form a seal with zero gap; the first intersection line and the third intersection line are parallel to each other to form a blowing and exhaust gap, and the air hole is connected with the blowing and exhaust gap.

[0008] Furthermore, the circumferential depression of the head of the inner core is provided with a groove, and the air holes are evenly distributed on the groove; the air holes are arranged opposite to each other in pairs, and the center line connecting the two holes is perpendicular to the center axis of the inner core.

[0009] Furthermore, a threaded connection portion is provided at the connection between the lower ends of the outer shell and the inner core.

[0010] Furthermore, the upper surfaces of the inner core and the outer shell are both flat, and when the inner core is connected and fixed to the outer shell, the upper surfaces of the inner core and the outer shell are flush.

[0011] Furthermore, a hollow rotating part is provided at the lower end of the inner core, and the hollow part of the rotating part is connected to the airway; an external tool is inserted into the rotating part and rotated to generate torque, thereby driving the inner core to rotate relative to the outer shell along the thread.

[0012] Furthermore, the rotating part includes a plurality of side surfaces connected end to end and surrounding the central axis of the inner core, and the side surfaces are perpendicular to the plane where the inner core rotates.

[0013] Furthermore, the housing is cylindrical.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The outer periphery of the head position of the inner core of the present invention is provided with a first conical surface and a second conical surface, and the first conical surface is offset and processed at one time on the basis of the second conical surface; the inner wall of the outer shell is provided with a third conical surface; an exhaust gap is formed between the first conical surface and the third conical surface, and the second conical surface and the third conical surface are matched with zero gap, which helps to ensure the consistency and accuracy of the exhaust flow, and at the same time solves the problems of uneven gap and uneven exhaust in traditional exhaust devices, thereby solving the qualified rate of precision molds when producing products and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 The conical balanced flow blowing device of the present invention is a three-dimensional Figure 1 ; Figure 2 The conical balanced flow blowing device of the present invention is a three-dimensional Figure 2 ; Figure 3 is a cross-sectional view of the tapered balanced flow blowing and exhausting device of the present invention; Figure 4 It is an enlarged view of the blowing and exhaust gap in the cross-sectional view of the tapered balanced flow blowing and exhaust device of the present invention; Figure 5 is a cross-sectional view of the cone-balanced flow blowing and exhausting device of the present invention in an exploded state; Figure 6 is an exploded view of the conical balanced flow blowing and exhausting device of the present invention; Figure 7 It is a three-dimensional cross-sectional view of the explosion state of the tapered balanced flow blowing and exhausting device of the present invention.

[0016] In the figure: 1. Shell; 101. Third cone surface; 2. Inner core; 201. Air hole; 202. Air passage; 203. First cone surface; 204. Second cone surface; 205. Groove; 206. Rotating part; 2061. Side surface; 3. Blowing and exhausting gap; 4. Threaded joint; 5. Vertical plane; 6. Center axis; a, first intersection line; b, second intersection line; c, third intersection line. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0018] like Figures 1 to 7 As shown, the present invention requests a tapered balanced flow blowing device, which is used in precision molds such as injection molds, rubber molds, blow molds, etc., when producing products and needs to quickly exhaust the air in the mold cavity. Specifically, it includes an outer shell 1 and an inner core 2 installed in the outer shell 1. The outer shell 1 can be fixed to the mold by an interference fit, so the outer shell 1 is cylindrical and has a relatively smooth surface, so that the outer shell 1 can be driven into the fixing hole of the mold; and the cylindrical structure will make the circumferential force of the outer shell 1 better, and it is not easy to be compressed and deformed when it is driven into the fixing hole of the mold.

[0019] The inner core 2 is detachably connected to the outer shell 1 to facilitate cleaning of the inner core 2 and the interior of the outer shell 1; a threaded connection portion 4 is provided at the junction of the lower ends of the outer shell 1 and the inner core 2, and the threaded connection portion 4 includes an internal thread on the inner wall of the outer shell 1 and an external thread on the outer periphery of the inner core 2. By matching the internal thread and the external thread, the inner core 2 can be detachably connected to the outer shell 1.

[0020] Combination Figure 3 , Figure 6 as well as Figure 7 As shown, when the inner core 2 is connected to the outer shell 1, the outer shell 1 and the central axis 6 of the inner core 2 coincide, and the outer shell 1 and the inner core 2 are symmetrical about the longitudinal vertical plane 5 passing through the central axis 6, that is, the outer shell 1 and the inner core 2 themselves have a high degree of symmetry, which is conducive to uniform overall force; the inner core 2 includes a head and a columnar portion connected as a whole, the head is provided with an air hole 201, and the central axis of the columnar portion is provided with an air channel 202, and the air channel 202 extends upward to communicate with the air hole 201; the outer periphery of the head position of the inner core 2 is provided with a first conical surface 203 and a second conical surface 204, and the inner wall of the outer shell 1 is provided with a third conical surface 101; the conical surface inclinations of the first conical surface 203, the second conical surface 204 and the third conical surface 101 are the same.

[0021] The longitudinal vertical plane 5 intersects with the first cone surface 203, the second cone surface 204, and the third cone surface 101 to form a first intersection line a, a second intersection line b, and a third intersection line c respectively; when the inner core 2 and the outer shell 1 are in an assembled and used state, the second intersection line b and the third intersection line c are tightly connected to make the second cone surface 204 and the third cone surface 101 fit with zero gap to form a seal; the first intersection line a and the third intersection line c are parallel to each other to form a blowing and exhaust gap 3, and the air hole 201 is connected to the blowing and exhaust gap 3.

[0022] The effect of the above setting is that, when the mold cavity is vented, the airflow flows through the blowing and exhaust gap 3 to the air hole 201, and then flows from the air hole 201 to the air channel 202 to be discharged from the mold; when blowing air into the mold cavity, the compressed air flows through the air pipe connected to the outside of the mold to the air channel 202, flows to the air hole 201, and blows into the mold cavity through the blowing and exhaust gap 3. Any vertical plane 5 passing through the central axis 6 intersects with the first cone surface 203 and the third cone surface 101 to form a first intersection line a and a third intersection line c that are parallel to each other, that is, the exhaust gap size between the inner core 2 and the outer shell 1 of the formed blowing and exhaust gap 3 is consistent, ensuring that the blowing and exhaust gap is absolutely balanced, eliminating the problem of uneven blowing and exhaust gap caused by processing errors.

[0023] In addition, the inner core 2 and the outer shell 1 are matched with each other in conical surfaces (the second conical surface 204 and the third conical surface 101), and can be matched to a zero gap; the first conical surface 203 and the second conical surface 204 of the inner core 2 are processed at one time, so the coaxiality and relative position are accurately guaranteed. When the inner core 2 and the outer shell 1 are assembled together through the threaded connection part 4, the gap of the blowing and exhaust gap 3 is guaranteed to be uniform. Even if the inner core 2 is disassembled multiple times, it can be accurately returned to the outer shell each time it is disassembled and assembled, and the blowing and exhaust gap 3 always remains unchanged.

[0024] The present invention is inspired by the tool tip offset function of the machining position during CNC lathe machining. When producing and machining the inner core 2, this function can ensure that the first cone surface 203 and the second cone surface 204 of the inner core 2 are at the same angle, and the offset position ensures absolute coaxiality and accurate relative position, thereby eliminating the problem of uneven blowing and exhaust gaps and uneven blowing and exhaust flow caused by machining errors, thereby improving the yield rate of mold production products and improving production efficiency; at the same time, it solves the problem of defective blowing and exhaust device waste caused by uneven blowing and exhaust gaps, and effectively improves the production efficiency and yield rate of the blowing and exhaust device.

[0025] Due to processing errors and assembly errors, the current exhaust device cannot guarantee the consistency and accuracy of the exhaust gap below 0.01mm of the blowing exhaust device, and thus cannot ensure that precision molds such as injection molds and blow molds can exhaust quickly and evenly without glue leakage when producing products.

[0026] The present invention effectively solves the exhaust flow consistency and accuracy of the 0.003mm-0.01mm exhaust gap blowing exhaust device, and simultaneously solves the problem of uneven gap and unbalanced exhaust of the 0.01mm-0.03mm gap blowing exhaust device, thereby solving the qualified rate of precision molds in product production and improving production efficiency.

[0027] Therefore, through the tapered surface matching of the inner core 2 and the outer shell 1 and the structure of the blowing and exhaust gap 3 formed, an exhaust gap of a size that meets the use requirements can be produced.

[0028] like Figure 3 As shown, the circumferential depression of the head of the inner core 2 is provided with a groove 205 , and the air holes 201 are evenly distributed on the groove 205 ; the air holes 201 are arranged opposite to each other in pairs, and the center line connecting the two holes is perpendicular to the center axis 6 of the inner core 2 .

[0029] The second cone surface 204 and the third cone surface 101 form a seal with zero gap, so that the gas flows in sequence among the set path airway 202, the air hole 201, and the blowing and exhaust gap 3, without leakage in other connecting parts between the outer shell 1 and the inner core 2, which helps to ensure the controllable flow rate.

[0030] The upper surfaces of the inner core 2 and the outer shell 1 are both flat, and when the inner core 2 is connected and fixed to the outer shell 1, the upper surfaces of the inner core 2 and the outer shell 1 are flush; since after installation, the upper surfaces of the inner core 2 and the outer shell 1 are facing the inner side of the mold cavity, the above design makes the inner side of the structure flat after the two are installed, and will not be affected by the processed objects in the mold cavity.

[0031] The lower end of the inner core 2 is provided with a hollow rotating part 206, and the hollow part of the rotating part 206 is connected to the airway 202, that is, the design of the rotating part 206 does not affect the use of the airway 202, and the design is ingenious; the external tool is inserted into the rotating part 206 to rotate to generate torque, thereby driving the inner core 2 to rotate along the thread relative to the outer shell 1; in this embodiment, the rotating part 206 is designed to be a hexagonal socket, and the inner core 2 can be assembled and disassembled by inserting a hexagonal wrench into the hexagonal socket and rotating the inner core 2. .

[0032] Combination Figure 6 It can be seen that the rotating portion 206 includes a plurality of side surfaces 2061 connected end to end and surrounding the central axis 6 of the inner core 2 , and the side surfaces 2061 are perpendicular to the plane where the inner core 2 rotates.

[0033] Therefore, when the hexagonal screwdriver is inserted into the rotating part 206 and rotates, the force can be evenly transmitted to each side surface 2061. Since the side surface 2061 is perpendicular to the plane where the inner core 2 rotates, that is, when the hexagonal screwdriver rotates, its rotational force can basically act directly on the side surface 2061. The rotational force on the side surface 2061 is transmitted more thoroughly, avoiding waste of force and thus facilitating assembly and disassembly.

[0034] The present invention discloses a conical balanced flow blowing and exhausting device, wherein a first conical surface and a second conical surface are arranged on the periphery of the head position of an inner core, and a third conical surface is arranged on the inner wall of an outer shell; an exhaust gap is formed between the first conical surface and the third conical surface, and the second conical surface and the third conical surface cooperate with each other with zero gap, which helps to ensure the consistency and accuracy of the exhaust flow, and solves the problems of uneven gap and unbalanced exhaust in traditional exhaust blowing and exhausting devices, thereby solving the qualified rate of precision molds when producing products and improving production efficiency.

[0035] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A conical balanced flow blowing device, characterized in that: The invention comprises an outer shell (1) and an inner core (2) installed in the outer shell (1), wherein the central axis (6) of the outer shell (1) and the inner core (2) coincide with each other, and the outer shell (1) and the inner core (2) are symmetrical about a vertical plane (5) passing through the central axis (6); the inner core (2) comprises a head portion and a columnar portion connected in one piece, wherein the head portion is provided with an air hole (201), and the central axis of the columnar portion is provided with an air passage (202), and the air passage (202) extends upward to communicate with the air hole (201); the outer periphery of the head portion of the inner core (2) is provided with a first conical surface (203) and a second conical surface (204), and the inner wall of the outer shell (1) is provided with a The third conical surface (101); the vertical plane (5) intersects with the first conical surface (203), the second conical surface (204), and the third conical surface (101) to form a first intersection line (a), a second intersection line (b), and a third intersection line (c); when the inner core (2) and the outer shell (1) are in an assembled and used state, the second intersection line (b) and the third intersection line (c) are tightly connected to form a seal with zero clearance between the second conical surface (204) and the third conical surface (101); the first intersection line (a) and the third intersection line (c) are parallel to each other to form a blowing and exhaust gap (3), and the air hole (201) is connected to the blowing and exhaust gap (3).

2. The conical balanced flow blowing device according to claim 1, characterized in that: The circumferential depression of the head of the inner core (2) is provided with a groove (205), and the air holes (201) are evenly distributed on the groove (205); the air holes (201) are arranged opposite to each other in pairs, and the center line connecting the two holes is perpendicular to the center axis (6) of the inner core (2).

3. The conical balanced flow blowing device according to claim 1, characterized in that: A threaded connection portion (4) is provided at the connection point between the lower ends of the outer shell (1) and the inner core (2).

4. The conical balanced flow blowing device according to claim 3, characterized in that: The upper surfaces of the inner core (2) and the outer shell (1) are both flat, and when the inner core (2) is connected and fixed to the outer shell (1), the upper surfaces of the inner core (2) and the outer shell (1) are flush.

5. The conical balanced flow blowing device according to claim 3, characterized in that: The lower end of the inner core (2) is provided with a hollow rotating portion (206), and the hollow portion of the rotating portion (206) is in communication with the air passage (202); an external tool is inserted into the rotating portion (206) and rotated to generate a torque, thereby driving the inner core (2) to rotate relative to the outer shell (1) along the thread.

6. The conical balanced flow blowing device according to claim 5, characterized in that: The rotating portion (206) comprises a plurality of side surfaces (2061) connected end to end and surrounding the central axis (6) of the inner core (2), and the side surfaces (2061) are perpendicular to the plane in which the inner core (2) rotates.

7. The conical balanced flow blowing device according to claim 1, characterized in that: The housing (1) is cylindrical.

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