Precious metal high-pressure expansion forming device

Abstract

The utility model belongs to the technical field of jewelry processing, and particularly relates to a precious metal high-pressure expansion forming device which comprises a safety die frame, die blocks are arranged at the bottom of the safety die frame respectively, a material ejection cylinder is installed at the top of the safety die frame, a filling groove is formed in the top of the material ejection cylinder, a piston rod is arranged in the filling groove, and the piston rod is connected with the safety die frame. A conical sealing block is arranged at the bottom of the material ejecting cylinder, and an injection hole is formed in the filling groove. The module corresponding to the precious metal 3D patterns needing to be machined is formed and machined at a time, the machining efficiency is greatly improved, and meanwhile the machining cost is lower.

Description

Technical Field

[0001] The utility model belongs to the technical field of jewelry processing, and particularly relates to a precious metal high-pressure expansion forming device. Background Art

[0002] 3D hard gold jewelry is very popular due to its rich and diverse shapes. The existing 3D hard gold is mainly processed and formed by the jewelry electroforming process, which mainly includes the following steps: 1. Design model: Make a 3D model according to the design requirements; 2. Make a mold: Convert the 3D model into a solid style and make it into a mold; 3. Prepare the metal: Cut the precious metal into small pieces or small blocks, weigh them and put them into the electrolytic cell; 4. Prepare the electrolyte: Prepare the electrolyte in proportion, and then add the electrolyte into the electrolytic cell; 5. Start electroplating: Turn on the power supply, start the current, and deposit the precious metal ions on the mold; 6. Complete crystal production: After the deposition is completed, take out the mold, remove wax, remove silver clothing, clean and perform surface treatment. This processing method has the following problems: First, the deposition speed is slow during processing. Generally, the deposition is between 0.2 and 0.4 millimeters, which takes about one day. The processing efficiency is low, the processing procedure is cumbersome, and the production cost is high; Second, in the later processing, the electroformed products go through processes such as punching, wax removal, and silver clothing removal, and a variety of chemical products are needed for wax removal and silver cleaning, which is easy to cause environmental pollution, and there are residual chemical substances in the later processing, and the jewelry also has a certain risk of chemical damage to the human body. Therefore, it is necessary to further improve the processing scheme of such 3D hard gold jewelry. Content of the Utility Model

[0003] To solve the problems raised in the above background art, the utility model provides a precious metal high-pressure expansion forming device, which solves the technical problems of low processing efficiency, high cost and chemical product pollution in the prior art.

[0004] To achieve the above object, the utility model provides the following technical solution: A precious metal high-pressure expansion forming device includes a safety mold frame. Modules are respectively arranged at the bottom of the safety mold frame. A top material cylinder is installed at the top of the safety mold frame. A filling groove is opened at the top of the top material cylinder. A piston rod is arranged inside the filling groove. A conical sealing block is arranged at the bottom of the top material cylinder. An injection hole is opened inside the filling groove, and one end of the injection hole penetrates through the top material cylinder and the conical sealing block.

[0005] Preferably, a placement groove is opened on one side of the module, and an empty tube is arranged inside the placement groove.

[0006] Preferably, the outer shape of the placement groove is the same as that of the empty tube, and the center of the placement groove is spherical. A D pattern is engraved on the inner wall of the spherical groove opened in the inner cavity of the placement groove.

[0007] Preferably, an alloy plug is provided at the bottom of the placement groove, and the top of the alloy plug is sealed inside the hollow tube.

[0008] Preferably, the conical sealing block is located at the top of the placement groove, and the bottom of the conical sealing block is sealed inside the hollow tube.

[0009] Preferably, the number of the modules is four.

[0010] Preferably, a liquid filler is provided inside the filling groove and is located at the bottom of the piston rod.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] During use, the ultra-high pressure internal expansion processing technology is adopted to seal and pressurize the pre-fabricated precious metal hollow tube in the placement groove. Through the modules corresponding to the required 3D patterns of the processed precious metal, one-time forming processing is carried out. While the processing efficiency is greatly improved, the processing cost is lower, the additional process cost of 3D hard gold jewelry is lower, which is more conducive to the sales and promotion of 3D hard gold jewelry; at the same time, the ultra-high pressure internal expansion 3D pattern forming technology completely adopts a physical processing technology, without problems such as chemical wax removal, silver removal, and cleaning in the jewelry electroforming process, so there are no problems of environmental pollution and chemical residue, and the production is more environmentally friendly and more reassuring to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0014] Figure 1 is the first three-dimensional structure diagram of the present utility model;

[0015] Figure 2 is the second three-dimensional structure diagram of the present utility model;

[0016] Figure 3 is the schematic diagram of the injection hole of the present utility model;

[0017] Figure 4 is the schematic diagram of the conical sealing block of the present utility model;

[0018] Figure 5 is the three-dimensional view of the module of the present utility model;

[0019] Figure 6 is the three-dimensional view of the hollow tube of the present utility model;

[0020] Figure 7 is the explosion diagram of the present utility model;

[0021] Figure 8Schematic diagram of the module of the present utility model.

[0022] In the figure: 1, safety die frame; 2, ejector cylinder; 3, piston rod; 4, module; 5, alloy plug; 6, filling groove; 7, injection hole; 8, conical sealing block; 9, placement groove; 10, empty tube. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figure 1-8 , the present utility model provides the following technical solutions: A precious metal high-pressure expansion forming device includes a safety die frame 1. Modules 4 are respectively arranged at the bottom of the safety die frame 1. An ejector cylinder 2 is installed at the top of the safety die frame 1. A filling groove 6 is opened at the top of the ejector cylinder 2. A piston rod 3 is arranged inside the filling groove 6. A conical sealing block 8 is arranged at the bottom of the ejector cylinder 2. An injection hole 7 is opened inside the filling groove 6, and one end of the injection hole 7 penetrates through the ejector cylinder 2 and the conical sealing block 8.

[0025] In this embodiment: The inner wall of the spherical groove opened in the inner cavity of the placement groove 9 is engraved with a 3D pattern.

[0026] In this embodiment: The empty tube 10 is formed by precision deep drawing. The two ends of the empty tube 10 have the same shape as the two ends of the placement groove 9 for the sealing in the next forming process.

[0027] In this embodiment: The thickness of the empty tube is about 0.05 to 0.1 mm.

[0028] In this embodiment: After the empty tube 10 is placed in the module 4, the alloy plug is placed at one end to make the alloy plug flush with the bottom surface. By using the alloy plug, one end of the empty tube 10 is sealed by the alloy plug.

[0029] In this embodiment: During use, the bottom surface of the ejector cylinder 2 is closely attached to the upper end of the mold. The bottom of the conical sealing block 8 is in contact with the top of the empty tube 10, and the injection hole 7 is communicated with the inside of the empty tube 10. A force is applied to press on the top surface of the ejector cylinder 2 to completely seal the tube blank by using the pressure. Then, a pressure is applied to the piston rod 3 to make the piston rod 3 move downward at a constant speed. As the piston rod 3 moves downward, the pressure in the cylinder increases, and the internal pressure of the empty tube 10 increases accordingly, causing a certain deformation of the empty tube 10, thinning the tube wall. The downward movement of the piston rod is controlled to control the pressure in the cylinder to form a shape the same as the cavity of the placement groove 9.

[0030] In this embodiment, the liquid filler can be oil, wax, glue, water or others.

[0031] The working principle and usage process of the present utility model: After the present utility model is installed, during use, the empty tube 10 is placed inside the placement groove 9, and then the assembly module 4 is pieced together so that the module 4 is located inside the safety mold frame 1, and the safety mold frame 1 is used to restrict the module 4. Then, the alloy plug 5 is installed at the bottom of the placement groove 9, and the alloy plug 5 is hermetically installed with the placement groove 9 and the empty tube 10, and the conical sealing block 8 is hermetically installed with the top of the empty tube 10. Then, pressure is applied to the piston rod 3, and the piston rod 3 is driven to move downward by the pressure, so that the liquid filler is pressurized into the empty tube 10 through the injection hole 7, and the wall of the empty tube 10 becomes thinner until it fits against the inner side of the placement groove 9 to form the required 3D pattern to be processed. Then, the piston rod 3 releases the pressure upward, the safety mold frame 1 is separated from the module 4, and then the module 4 is opened, so as to obtain the precious metal with the 3D pattern on the inner wall of the placement groove 9.

[0032] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A noble metal high-pressure expansion forming device, comprising a safety die frame (1), characterized in that: Modules (4) are respectively arranged at the bottom of the safety die frame (1). A top feeding cylinder (2) is installed at the top of the safety die frame (1). A filling groove (6) is formed at the top of the top feeding cylinder (2). A piston rod (3) is arranged inside the filling groove (6). A conical sealing block (8) is arranged at the bottom of the top feeding cylinder (2). An injection hole (7) is formed inside the filling groove (6), and one end of the injection hole (7) penetrates through the top feeding cylinder (2) and the conical sealing block (8).

2. The noble metal high-pressure expansion forming device according to claim 1, wherein: A placing groove (9) is formed on one side of the module (4). An empty tube (10) is arranged inside the placing groove (9).

3. A noble metal high-pressure expansion forming device according to claim 2, characterized in that: The outer shape of the placing groove (9) is the same as that of the empty tube (10), and the center of the placing groove (9) is spherical. A 3D pattern is engraved on the inner wall of the spherical groove formed inside the placing groove (9).

4. A noble metal high-pressure expansion forming device according to claim 2, characterized in that: An alloy plug (5) is arranged at the bottom of the placing groove (9), and the top of the alloy plug (5) is sealed inside the empty tube (10).

5. A noble metal high-pressure expansion forming device according to claim 1, characterized in that: The conical sealing block (8) is located at the top of the placing groove (9), and the bottom of the conical sealing block (8) is sealed inside the empty tube (10).

6. The noble metal high-pressure expansion forming device according to claim 1, wherein: The number of the modules (4) is four.

7. A noble metal high-pressure expansion forming device according to claim 1, characterized in that: A liquid filler is arranged inside the filling groove (6) and is located at the bottom of the piston rod (3).

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