Leakage-proof bottle preform mold nozzle assembly

Abstract

The utility model relates to a leakproof bottle preform mould nozzle assembly which comprises a hot runner plate and a transition plate, the transition plate is provided with a stepped through hole for installing a nozzle seat and is provided with the nozzle seat, the upper end part of the nozzle seat protrudes out of the transition plate and is in butt joint with a hot runner outlet of the hot runner plate, and the lower end of the nozzle seat is provided with a nozzle from inside to outside. A hollow runner communicated with the hot runner and the nozzle is arranged in the nozzle seat; a circle of sealing groove is formed in the butt joint face, opposite to the hot runner plate, of the nozzle base, a copper gasket is installed in the sealing groove, the height of the sealing groove is larger than the depth of the sealing groove, and when the copper gasket is located in the sealing groove and pressed by the hot runner plate in an abutting mode, the copper gasket extends to fill the sealing groove. According to the utility model, the sealing groove and the copper washer are additionally arranged on the protruding butt joint surface of the nozzle seat, which is in butt joint with the hot runner plate, the sealing and leakage prevention of the nozzle seat and the hot runner plate are realized by utilizing the ductility of the copper washer, and the nozzle seat is detachable relative to the transition plate, so that the mold cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to the technology of bottle preform mold components, in particular to a leak-proof bottle preform mold nozzle component. Background Art

[0002] Currently, hot runner molds are widely used in the production and processing of products such as bottle preforms. Due to the high pressure within the mold cavity during the injection molding process, not only must the joint sealing between the hot runner plate and the reducer bend be highly demanding, but the connection sealing between the hot runner plate, nozzle holder, and transition plate must also be highly demanding. Otherwise, problems such as molten rubber leakage may occur. Existing methods for controlling sealing mainly rely on interference fits, which require very high machining precision for the transition plate, nozzle holder, and hot runner plate, making it difficult to achieve and very costly. Furthermore, the interference fit makes it difficult to disassemble and assemble the two, and the disassembly process can easily damage the mold. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and provide a leak-proof preform mold nozzle assembly.

[0004] The utility model is achieved through the following technical solutions.

[0005] A leak-proof preform mold nozzle assembly comprises a hot runner plate and a transition plate, wherein the hot runner plate is provided with a plurality of hot runners, the transition plate is provided with a stepped through hole for installing a nozzle seat and is provided with a nozzle seat, the upper end of the nozzle seat protrudes from the transition plate and is connected to the hot runner outlet of the hot runner plate, the lower end of the nozzle seat is provided with a nozzle from the inside out, and a hollow flow channel connecting the hot runner and the nozzle is provided in the nozzle seat; wherein a circle of sealing grooves is provided on the docking surface of the nozzle seat opposite to the hot runner plate, a copper washer is installed in the sealing groove, the height of the copper washer is greater than the depth of the sealing groove, and when the copper washer is located in the sealing groove and is pressed against and squeezed by the hot runner plate, the copper washer extends to fill the sealing groove.

[0006] Furthermore, the upper end portion of the nozzle seat has an outward-rolled ring formed by rolling outward and downward, and the outward-rolled ring contacts the inner wall of the stepped through hole of the transition plate. The outward-rolled ring structure enables the nozzle seat to have a certain deformation ability, and can form an expansion connection with the stepped through hole, reducing the high requirements for processing accuracy and facilitating the replacement or maintenance of the nozzle seat.

[0007] The utility model adopts the above structure, and adds a sealing groove and a copper gasket to the protruding docking surface of the nozzle seat that docks with the hot runner plate. The ductility of the copper gasket is used to achieve sealing and leakage prevention between the nozzle seat and the hot runner plate. At the same time, the stepped through hole of the nozzle seat and the transition plate is matched with an outward-turned ring, which can achieve expansion connection and make the nozzle seat detachable relative to the transition plate. In this way, the processing accuracy requirements for the hot runner plate, transition plate and nozzle seat can be reduced, thereby reducing their assembly difficulty, and also facilitating their disassembly and maintenance, thereby reducing the cost of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural diagram of the present utility model.

[0009] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle. DETAILED DESCRIPTION

[0010] The present invention will be further described below with reference to specific examples and accompanying drawings.

[0011] like Figure 1 、 Figure 2 As shown, a leak-proof bottle preform mold nozzle assembly includes a hot runner plate 1 and a transition plate 2. The hot runner plate 1 is provided with a plurality of hot runners. The transition plate 2 is provided with a stepped through hole 20 for installing a nozzle seat 3 and is provided with a nozzle seat 3. The upper end of the nozzle seat 3 protrudes from the transition plate 2 and is connected to the outlet of the hot runner 10 of the hot runner plate 1. The lower end of the nozzle seat 3 is provided with a nozzle 4 from the inside to the outside. A hollow flow channel 30 connecting the hot runner 10 and the nozzle 4 is provided in the nozzle seat 3; wherein, a circle of sealing grooves 31 are provided on the docking surface of the nozzle seat 3 opposite to the hot runner plate 1, and a copper washer 32 is installed in the sealing groove 31. The height of the copper washer 32 is greater than the depth of the sealing groove 31. When the copper washer 32 is located in the sealing groove 31 and is pressed against and squeezed by the hot runner plate 1, the copper washer 32 extends to fill the sealing groove 31.

[0012] Furthermore, the upper end of the nozzle seat 3 has an outward-rolling ring 33 formed by rolling outward and downward, and contacts the inner wall of the stepped through hole 20 of the transition plate 2 through the outward-rolling ring 33. The outward-rolling ring 33 structure enables the nozzle seat 3 to have a certain deformation ability, and can form an expansion connection with the stepped through hole 20, reducing the high requirements for processing accuracy and facilitating the replacement or maintenance of the nozzle seat 3.

[0013] The present invention adopts the above structure, and adds a sealing groove 31 and a copper gasket 32 ​​to the protruding docking surface of the nozzle seat 3 that docks with the hot runner plate 1. The ductility of the copper gasket 32 ​​is used to achieve sealing and leakage prevention between the nozzle seat 3 and the hot runner plate 1. At the same time, the nozzle seat 3 and the stepped through hole 20 of the transition plate 2 are matched with an outward-turned ring 33, which can achieve expansion connection and make the nozzle seat 3 detachable relative to the transition plate 2. In this way, the processing accuracy requirements for the hot runner plate 1, the transition plate 2 and the nozzle seat 3 can be reduced, thereby reducing their assembly difficulty, and also facilitating their disassembly and maintenance, thereby reducing the mold cost.

[0014] The above embodiments are only preferred implementation methods of the present invention and are only used to explain the present invention rather than to limit the present invention. Any changes, replacements, combinations, simplifications, modifications, etc. made by those skilled in the art without departing from the spirit and principles of the present invention shall be considered as equivalent replacement methods and shall be included in the scope of protection of the present invention.

Claims

1. A leak-proof preform mold nozzle assembly, comprising a hot runner plate and a transition plate, characterized in that: The hot runner plate is provided with a plurality of hot runners, and the transition plate is provided with a stepped through hole for installing a nozzle seat and a nozzle seat is installed thereon. The upper end of the nozzle seat protrudes from the transition plate and docks with the hot runner outlet of the hot runner plate. The lower end of the nozzle seat is provided with a nozzle from the inside out, and a hollow flow channel connecting the hot runner and the nozzle is provided in the nozzle seat; wherein, a circle of sealing grooves is provided on the docking surface of the nozzle seat opposite to the hot runner plate, and a copper washer is installed in the sealing groove, and the height of the copper washer is greater than the depth of the sealing groove. When the copper washer is located in the sealing groove and is pressed against and squeezed by the hot runner plate, the copper washer extends to fill the sealing groove.

2. The leak-proof preform mold nozzle assembly according to claim 1, characterized in that: The upper end portion of the nozzle seat has an outward-rolled ring formed by rolling outward and downward, and contacts the inner wall of the stepped through hole of the transition plate through the outward-rolled ring.

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