Pouring mold for single-ended hemispherical cylindrical hydrophone

Abstract

The utility model provides a single-ended hemispherical cylindrical hydrophone filling mould, which comprises a left half mould, a right half mould, a top cover and a bottom plate, the left half mould and the right half mould are buckled to form a mould cavity for forming a single-ended hemispherical cylindrical hydrophone, the mould cavity is communicated up and down, the top cover is fixedly connected on the left half mould and the right half mould at the upper end of the mould cavity, and the bottom plate is fixedly connected with the top cover. The bottom plate is fixedly connected to the left half die and the right half die at the lower end of the die cavity, the top cover is provided with an axially-through exhaust hole, the bottom plate is provided with an axially-through fixing hole, and the exhaust hole and the fixing hole are both communicated with the die cavity. The mold can improve the forming precision of the watertight layer of the hydrophone, reduce bubbles, improve the surface smoothness, reduce the demolding difficulty, improve the production efficiency, adapt to the forming requirements of products with unconventional shapes, save the research and development and manufacturing cost, and meanwhile, the mold is simple in overall structure and suitable for large-scale industrial production.

Description

TECHNICAL FIELD

[0001] The utility model relates to polyurethane perfusion mould technical field, especially single end hemispherical cylindrical hydrophone perfusion mould, be applicable to the field such as water acoustic transducer, electronic component packaging. BACKGROUND

[0002] In the production of water acoustic transducer, electronic component etc., polyurethane is commonly used packaging material, and the existing polyurethane perfusion mould generally has unreasonable mould cavity design, bubble is difficult to discharge, demoulding difficulty and other problems, resulting in poor surface quality or insufficient precision of finished product. When packaging water acoustic transducer, electronic component etc., product demoulding quality is often low due to mould design problem, and there are too many air holes in complex structure, and in serious case, product is directly scrapped. SUMMARY

[0003] The utility model provides a single end hemispherical cylindrical hydrophone perfusion mould to overcome the insufficient in the prior art, the single end hemispherical cylindrical hydrophone perfusion mould, optimization mould cavity design, improvement polyurethane flow channel, improvement exhaust mode, improve hydrophone finished product surface quality.

[0004] The utility model provides a single end hemispherical cylindrical hydrophone perfusion mould, including left half mould, right half mould, top cover and bottom plate, wherein, left half mould and right half mould buckle inside form the mould cavity for forming single end hemispherical cylindrical hydrophone, and the mould cavity is communicated, the top cover is fixedly connected on the left half mould and right half mould on the upper end of mould cavity, and the bottom plate is fixedly connected on the left half mould and right half mould on the lower end of mould cavity, and the top cover is equipped with the exhaust hole that penetrates axially, the bottom plate is equipped with the fixed hole that penetrates axially, and the exhaust hole and fixed hole all are communicated with the mould cavity.

[0005] Further, the mould cavity includes first cylindrical cavity, spherical cavity, second cylindrical cavity and third cylindrical cavity connected in sequence from bottom to top, the inner diameter of first cylindrical cavity is recorded as R1, the inner diameter of second cylindrical cavity is recorded as R2, the inner diameter of third cylindrical cavity is recorded as R3, then satisfy: R1

[0006] As preferred, the arc-shaped collision-avoiding groove is a semicircular collision-avoiding groove.

[0007] As preferred, the step surface is a slope surface downwardly inclined from the arc-shaped collision-avoiding groove, and the inclination angle of the slope surface is 10°-20°.

[0008] Further, the left half mold and the right half mold are further provided with a positioning structure, the positioning structure comprises a positioning column and a positioning hole, the positioning column and / or the positioning hole are arranged on the left half mold, the right half mold is provided with a positioning hole and / or a positioning column matched with the positioning column and / or the positioning hole on the left half mold, and the positioning column is inserted into the corresponding positioning hole when the mold is closed.

[0009] The positioning column or the positioning hole can be arranged on the left half mold or the right half mold, and the positioning column and the positioning hole can be simultaneously arranged.

[0010] Further, the left half mold and the right half mold are further provided with a positioning structure, the positioning structure comprises a positioning column and a positioning hole, the positioning column and / or the positioning hole are arranged on the left half mold, the right half mold is provided with a positioning hole and / or a positioning column matched with the positioning column and / or the positioning hole on the left half mold, and the positioning column is inserted into the corresponding positioning hole when the mold is closed.

[0011] Further, the top cover comprises a limiting connecting plate and a plunger, the plunger is arranged below the limiting connecting plate, the outer diameter of the plunger is the same as the inner diameter of the third columnar cavity, and the exhaust hole penetrates the limiting connecting plate and the plunger from top to bottom.

[0012] Further, in order to realize the fixed connection of the top cover, the left half mold and the right half mold, first connecting holes are arranged on the limiting connecting plate around the exhaust hole, second connecting holes corresponding in number and position to the first connecting holes are arranged on the upper end faces of the left half mold and the right half mold, and the fixed connection of the top cover, the left half mold and the right half mold is realized by connecting the first connecting holes and the second connecting holes through a connecting piece.

[0013] Further, in order to realize the fixed connection of the bottom plate, the left half mold and the right half mold, fourth connecting holes are arranged around the fixing holes of the bottom plate, third connecting holes corresponding in number and position to the fourth connecting holes are arranged on the lower end faces of the left half mold and the right half mold, and the fixed connection of the bottom plate, the left half mold and the right half mold is realized by connecting the third connecting holes and the fourth connecting holes through a connecting piece.

[0014] Further, in order to facilitate demolding, a demolding layer is attached to the inner surfaces of the mold cavity formed by the left half mold, the right half mold and the top cover, and the inner surfaces are smooth.

[0015] The single-end hemispherical cylindrical hydrophone pouring mold has the advantages that the forming precision of the water-tight layer of the hydrophone is improved, air bubbles are reduced, the surface smoothness is improved, the demolding difficulty is reduced, the production efficiency is improved, the forming requirements of unconventional products are met, the research and development and manufacturing costs are saved, the overall structure is simple, and the single-end hemispherical cylindrical hydrophone pouring mold is suitable for large-scale industrial production. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model makes further explanation in connection with the drawings and examples.

[0017] Fig. 1 This is a schematic diagram of the split structure of the injection mold for the single-end hemispherical cylindrical hydrophone of this utility model.

[0018] Fig. 2 This is a schematic diagram of the mold cavity structure.

[0019] Fig. 3 This is a schematic diagram showing the usage state of the injection mold for the single-end hemispherical cylindrical hydrophone of this utility model.

[0020] In the diagram: 1. Top cover, 11. Limiting connecting plate, 12. Piston, 13. Vent hole, 14. First connecting hole, 2. Left half mold, 21. Body, 22. Positioning hole, 23. Left half groove, 24. Second connecting hole, 3. Right half mold, 31. Body, 32. Positioning pin, 33. Right half groove, 34. Second connecting hole, 4. Base plate, 41. Fixing hole, 42. Fourth connecting hole, 5. Mold cavity, 51. First cylindrical cavity, 52. Spherical cavity, 53. Second cylindrical cavity, 54. Third cylindrical cavity, 55. Collision avoidance groove, 56. Step surface. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components, orientations, and references (e.g., up, down, left, right, etc.) relevant to the present invention and are intended only to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0022] like Figs. 1-3 As shown, this utility model discloses a single-end hemispherical cylindrical hydrophone injection mold, comprising a left half mold 2, a right half mold 3, a top cover 1, and a bottom plate 4. The left half mold 2 and the right half mold 3 are interlocked to form a mold cavity 5 for molding the single-end hemispherical cylindrical hydrophone, and the mold cavity 5 is vertically connected. Fig. 2As shown, the mold cavity 5 has the same geometry as the hydrophone body, including a first cylindrical cavity 51, a spherical cavity 52, a second cylindrical cavity 52 and a third cylindrical cavity 54 connected in turn from bottom to top, the inner diameter of the first cylindrical cavity 51 is denoted as R1, the inner diameter of the second cylindrical cavity 52 is denoted as R2, and the inner diameter of the third cylindrical cavity 54 is denoted as R3, then R1 < R2 < R3 is satisfied, an arc-shaped collision avoidance groove 55 recessed to the side wall is arranged at the junction of the second cylindrical cavity 52 and the third cylindrical cavity 54, and the arc-shaped collision avoidance groove 55 forms a stepped surface 56 at the junction with the second cylindrical cavity 52. As a preferred, the arc-shaped collision avoidance groove 55 is a semicircular collision avoidance groove 55. As a preferred, the stepped surface 56 is a slope surface inclined downward from the arc-shaped collision avoidance groove 55, and the inclination angle α of the slope surface is 10°-20°. The top cover 1 is fixed on the left half mold 2 and the right half mold 3 at the upper end of the mold cavity 5, specifically, the top cover 1 includes a limiting connection plate 11 and a plunger 12, the plunger 12 is arranged below the limiting connection plate 11, and the outer diameter of the plunger 12 is the same as the inner diameter of the third cylindrical cavity 54, and an exhaust hole 13 penetrates the limiting connection plate 11 and the plunger 12 in turn from top to bottom. The bottom plate 4 is fixed on the left half mold 2 and the right half mold 3 at the lower end of the mold cavity 5, and the top cover 1 is provided with an axially penetrating exhaust hole 13, the bottom plate 4 is provided with an axially penetrating fixing hole 41, and the exhaust hole 13 and the fixing hole 41 are both communicated with the mold cavity 5, and the fixing hole 41 is used to fix the body of the hydrophone on the bottom plate 4. The left half mold 2 and the right half mold 3 are also provided with a positioning structure, the positioning structure includes a positioning column 32 and a positioning hole 22, the positioning column 32 and / or the positioning hole 22 are arranged on the left half mold 2, the right half mold 3 is provided with a positioning hole 22 and / or a positioning column 32 matched with the positioning column 32 and / or the positioning hole 22 on the left half mold 2, and when the mold is closed, the positioning column 32 is inserted into the corresponding positioning hole 22. The positioning column 32 or the positioning hole 22 can be arranged on the left half mold 2 or the right half mold 3, and can have both the positioning column 32 and the positioning hole 22, which can be set according to actual needs, and in the embodiment, as a preferred, the positioning hole 22 is arranged on the left half mold 2 and is integrally formed with the left half mold 2, and the positioning column 32 is arranged on the right half mold 3 and is integrally formed with the right half mold 3. The left half mold 2 and the right half mold 3 are also provided with an ejection structure for facilitating mold opening and closing operation, the ejection structure includes two left half grooves 23 arranged on both sides of the middle part of the left half mold 2, and two right half grooves 33 arranged on both sides of the middle part of the right half mold 3, and when the mold is closed, the left half groove 23 and the right half groove 33 are opposite to each other to form a pry opening. When the mold is opened, the operator can insert a pry bar or a straight screwdriver at the pry opening to disassemble the mold, which is convenient for operation.To achieve a fixed connection between the top cover 1 and the left half mold 2 and the right half mold 3, a first connecting hole 14 is provided on the limiting connecting plate 11 surrounding the vent hole 13. The upper surfaces of the left half mold 2 and the right half mold 3 are provided with second connecting holes 24 and 34, corresponding one-to-one in number and position to the first connecting holes 14. The top cover 1 is fixedly connected to the left half mold 2 by connecting the first connecting holes 14 and the second connecting holes 24, and the top cover 1 is fixedly connected to the right half mold 3 by connecting the first connecting holes 14 and the second connecting holes 34. To achieve a fixed connection between the bottom plate 4 and the left half mold 2 and the right half mold 3, a fourth connecting hole 42 is provided around the fixing hole 41 of the bottom plate 4. The lower surfaces of the left half mold 2 and the right half mold 3 are provided with third connecting holes (not shown in the figure), corresponding one-to-one in number and position to the fourth connecting holes 42. The bottom plate 4 is fixedly connected to the left half mold 2 and the right half mold 3 by connecting the third connecting holes and the fourth connecting holes 42. In this embodiment, the positioning hole 22, the left half groove 23, and the second connecting hole 24 are all provided on the body 21 of the left half membrane, and the positioning post 32, the right half groove 23, and the second connecting hole 34 are all provided on the body 31 of the right half membrane.

[0023] In this embodiment, all components, including the left half mold 2, right half mold 3, top cover 1, and base plate 4, are made of high-temperature and corrosion-resistant aluminum alloy. Connectors used for fixing include, but are not limited to, screws, bolts, and bolts. The base plate 4 is used to fix the body of the single-end hemispherical cylindrical hydrophone. The mold cavity 5 does not have a separate injection port; the injection port is shared with the mold cavity to avoid residual scars at the injection port after injection molding. After injection molding, the finished product surface is smooth and free of defects. The vent is used to expel air from the mold cavity 5. The surface of the mold cavity 5 is smooth and streamlined, optimizing polyurethane flow and reducing bubble formation. Each part can be separated individually, with a reasonable design for easy demolding. A release layer is attached to the inner surface of the mold cavity 5 formed by the left half mold 2, right half mold 3, and top cover 1, and the surface is smooth.

[0024] The left half mold 2 and the right half mold 3 are locked together by positioning pins 32, clamping the hydrophone body in the middle. The base plate 4 and the top cover 1 are then fixed in sequence. After installation, the structure is as follows: Fig. 3 As shown, the top cover 1 has vent holes, which can store glue and release air. The venting channel is located at the highest point of the mold, and the single-end hemispherical dome characteristic is used to facilitate air discharge and avoid air dispersion to form bubbles.

[0025] The injection molding process is as follows: first, embed the hydrophone into the mold cavity 5 formed by the left half mold 2 and the right half mold 3, and lock it through the positioning column 32, so that the hydrophone body is clamped in the mold cavity 5; the bottom plate 4 is fixed on the left half mold 2 and the right half mold 3 through screws, and the hydrophone body is fixed together; the top cover 1 is not installed first, the water-tight sound-transmitting layer is poured, the material of the water-tight sound-transmitting layer can be polyurethane but is not limited to polyurethane, the water-tight sound-transmitting layer is poured to the third cylindrical cavity 54 full, finally the top cover 1 is installed, the plunger 12 is inserted into the third cylindrical cavity 54, and the limiting plate 11 is locked and positioned, all the air in the mold cavity 5 is squeezed out to complete the pouring; wait until the water-tight sound-transmitting layer solidifies, disassemble the screws, remove the top cover 1 and the bottom plate 4, separate the left half mold 2 and the right half mold 3 through the left half slot 23 and the right half slot 33 of the pry, and take out the completed hydrophone from the mold cavity 5 to complete the demolding.

[0026] Based on the above ideal embodiments of the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the scope of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of the claims.

Claims

1. A single-ended hemispherical cylindrical hydrophone injection mold, characterized in that: The device includes a left half mold, a right half mold, a top cover, and a bottom plate. The left half mold and the right half mold are interlocked to form a mold cavity for molding a single-end hemispherical cylindrical hydrophone. The mold cavity is vertically connected. The top cover is fixed to the left half mold and the right half mold at the upper end of the mold cavity. The bottom plate is fixed to the left half mold and the right half mold at the lower end of the mold cavity. The top cover is provided with an axially penetrating vent hole, and the bottom plate is provided with an axially penetrating fixing hole. Both the vent hole and the fixing hole are connected to the mold cavity.

2. The single-end hemispherical cylindrical hydrophone injection mold as described in claim 1, characterized in that: The mold cavity includes a first cylindrical cavity, a spherical cavity, a second cylindrical cavity, and a third cylindrical cavity connected sequentially from bottom to top. The inner diameter of the first cylindrical cavity is denoted as R1, the inner diameter of the second cylindrical cavity is denoted as R2, and the inner diameter of the third cylindrical cavity is denoted as R3. The following condition is met: R1 < R2 < R3. The connection between the second cylindrical cavity and the third cylindrical cavity is provided with an arc-shaped collision avoidance groove that is recessed towards the side wall, and the connection between the arc-shaped collision avoidance groove and the second cylindrical cavity forms a stepped surface.

3. The single-end hemispherical cylindrical hydrophone injection mold as described in claim 2, characterized in that: The arc-shaped collision avoidance groove is a semi-circular collision avoidance groove.

4. The single-end hemispherical cylindrical hydrophone injection mold as described in claim 2, characterized in that: The stepped surface is a slope that slopes downward from the arc-shaped collision avoidance groove, and the slope angle α is 10°-20°.

5. The single-end hemispherical cylindrical hydrophone injection mold as described in claim 1, characterized in that: A positioning structure is also provided between the left half mold and the right half mold. The positioning structure includes a positioning post and a positioning hole. The positioning post and / or positioning hole is provided on the left half mold. The right half mold is provided with a positioning hole and / or positioning post that matches the positioning post and / or positioning hole on the left half mold. When the mold is closed, the positioning post is inserted into the corresponding positioning hole.

6. The single-end hemispherical cylindrical hydrophone injection mold as described in claim 1, characterized in that: A mold-lifting structure is also provided between the left and right half molds to facilitate mold opening and closing operations. The mold-lifting structure includes two left half grooves located on both sides of the middle of the left half mold and two right half grooves located on both sides of the middle of the right half mold. When the mold is closed, the left and right half grooves face each other to form a pry opening.

7. The single-end hemispherical cylindrical hydrophone injection mold as described in claim 1, characterized in that: The top cover includes a limiting connecting plate and a plunger. The plunger is located below the limiting connecting plate, and the outer diameter of the plunger is the same as the inner diameter of the third cylindrical cavity. The exhaust port passes through the limiting connecting plate and the plunger from top to bottom.

8. The single-end hemispherical cylindrical hydrophone injection mold as described in claim 7, characterized in that: The limiting connecting plate around the vent hole is provided with a first connecting hole, and the upper end face of the left half mold and the right half mold is provided with a second connecting hole that corresponds one-to-one with the number and position of the first connecting hole. The top cover is fixedly connected to the left half mold and the right half mold by connecting the first connecting hole and the second connecting hole through the connector.

9. The single-end hemispherical cylindrical hydrophone injection mold as described in claim 1, characterized in that: The base plate has a fourth connecting hole around the fixing hole. The lower end faces of the left and right half molds have third connecting holes that correspond one-to-one with the number and position of the fourth connecting hole. The base plate is fixedly connected to the left and right half molds by connecting the third and fourth connecting holes through the connector.

10. The single-end hemispherical cylindrical hydrophone injection mold as described in claim 1, characterized in that: A release layer is attached to the inner surface of the mold cavity formed by the left half mold, the right half mold, and the top cover.

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