Cast gold, silver and other metal handicraft and processing technology

Abstract

The invention belongs to the technical field of metal casting, and particularly relates to a cast gold, silver and other metal handicraft and a processing technology, which comprises the following steps: step 1, injecting molten metal into a pushing part, and pressing the molten metal into a forming part for molding at high speed and high pressure; secondly, the pushing and injecting part shrinks to form negative pressure, and the casting is kept fixed when the forming part is separated; thirdly, when the forming part is separated, the pushing part is extruded, the casting is ejected out through the pushing part, and primary separation of the casting and the forming part is completed; fourthly, when the forming part continues to be opened, the separating part is driven to stretch out to push the casting to move out, if the casting is not separated, the casting and the pushing part are driven to move out together, when the opening distance of the forming part reaches the limit, the separating part exerts pressure to forcibly separate the casting, and linkage demolding of the pushing part and the separating part is achieved; and 5, after the casting is discharged, the forming part is subjected to mold closing to reset the pushing part and the separating part for next injection molding. The injection molding machine integrates the functions of injection, molding and demolding, drives multi-link linkage by single power, simplifies the structure and realizes full-process automation.

Description

Technical Field

[0001] The invention belongs to the technical field of metal casting, and in particular relates to a casting process for gold, silver and other metal handicrafts and a processing process. Background Art

[0002] Traditional metal casting processes generally face the following technical bottlenecks when manufacturing gold, silver and other metal crafts:

[0003] Demolding efficiency is low and relies on manual labor: Traditional processes mostly rely on manual or semi-automatic demoulding. The casting and the mold are prone to adhesion, and repeated operations are required. This is not only time-consuming but also easy to cause damage to the casting or surface scratches, especially for fine precious metal crafts.

[0004] Casting quality is hampered by residual gas: When molten metal is injected into the mold, if gas cannot be effectively expelled, defects such as bubbles and cracks can easily form inside or on the surface of the casting. While existing molds employ simple exhaust structures, they struggle to achieve a balance between sealing and exhaust efficiency, impacting the density and appearance of the casting.

[0005] Complex equipment structure and insufficient automation: Traditional casting equipment typically designs modules such as injection, molding, and demolding independently, resulting in a loose structure and poor linkage. This requires multiple power sources for step-by-step operation, which not only takes up a lot of space but also relies on manual intervention, making continuous and efficient production difficult. Furthermore, the separation of the demolding mechanism from the mold can easily lead to jamming and inaccurate reset, increasing maintenance costs.

[0006] Although existing technologies attempt to improve the demolding process by optimizing the mold structure or introducing elastic components, there are still significant shortcomings: for example, the single demolding action leads to casting residues, low power transmission efficiency, unreasonable exhaust hole design leads to incomplete gas discharge, and equipment failures caused by poor coordination of multiple components. Summary of the Invention

[0007] The purpose of the present invention is to provide a casting process for gold, silver and other metal crafts and a processing process, which can realize automatic demoulding and resetting through the cooperation of a linked demoulding mechanism and an elastic component; the closed mold and vent hole design are combined with high-pressure injection to eliminate bubbles and improve the density of the casting; the injection, molding and demoulding functions are integrated, and multiple links are linked by a single power source, simplifying the structure and realizing full process automation, thereby significantly improving casting efficiency, quality and equipment stability.

[0008] The technical solutions adopted by the present invention are as follows:

[0009] A processing technology for casting gold, silver and other metal handicrafts, comprising:

[0010] Step 1: inject the molten metal into the injection part and press it into the forming part at high speed and high pressure to shape it;

[0011] Step 2: The pusher part contracts to create negative pressure, which keeps the casting fixed when the molding part separates;

[0012] Step 3: When the molding part is separated, the pushing part is squeezed to eject the casting through the pushing part, completing the initial separation of the casting and the molding part;

[0013] Step 4: As the forming part continues to open, the separation part is driven to extend and push the casting out. If the casting is not separated, the casting and the pushing part are driven to move out together. When the opening distance of the forming part reaches the limit, the separation part applies pressure to forcibly separate the casting, thereby realizing the linkage demoulding of the pushing part and the separation part.

[0014] Step 5: After the casting is ejected, the molding unit closes the mold to reset the pushing unit and the disengaging unit, waiting for the next injection molding.

[0015] A casting process for gold, silver and other metal crafts, in which the molten metal is injected into the injection part and the pressure is controlled in two stages: the initial stage is 8-12MPa for rapid filling, and the final stage is 12-15MPa for holding pressure for 3-8 seconds to feed the shrinkage, and the melt filling speed is controlled at 20-50cm 3 / s.

[0016] A processing technology for casting gold, silver and other metal crafts, characterized in that the forming part is arranged on a fixed base, the pushing part is slidably arranged on the upper part of the fixed base, the disengaging part is slidably arranged inside the pushing part, and the pushing part is connected to the forming part, the injection part is arranged on the upper part of the fixed base, and the output end of the injection part is connected to the interior of the forming part.

[0017] The cam is fixedly mounted on the support frame of the mobile stage and is adapted to move the movable member to the support frame when the cam is moved upwards to move the movable member toward the support frame.

[0018] In a preferred embodiment, the disengagement portion includes a disengagement seat, an elastic return member and a disengagement rod, the disengagement seat is slidably arranged inside the mounting seat, the elastic return member is arranged between the disengagement seat and the mounting seat, one end of the disengagement rod is fixedly connected to the disengagement seat, and the other end of the disengagement rod is slidably connected to the interior of the forming portion.

[0019] The cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame. The cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame.

[0020] In a preferred embodiment, a closed ridge is integrally formed at the fixed template, the closed ridge cooperates with the interior of the movable template, and an exhaust hole is provided at the closed ridge.

[0021] In a preferred embodiment, a pushing groove and a receiving groove are provided inside the mounting seat, and the insides of the pushing groove and the receiving groove match the outer edge of the limiting wheel.

[0022] In a preferred embodiment, the push injection part includes a push injection tube, a push injection column, a push injection cylinder and a guide tube. The push injection tube is fixedly connected to the fixed base, and the output end of the push injection tube is located between the fixed template and the movable template. The push injection column is slidably arranged inside the push injection tube, the push injection cylinder is fixedly connected to the fixed base, the output tube of the push injection cylinder is fixedly connected to the push injection column, the guide tube is fixedly connected to the upper part of the push injection tube, and the interior of the guide tube is communicated with the interior of the push injection tube.

[0023] The invention discloses a gold, silver and other metal craftwork, which is characterized in that the craftwork is made by using the same processing technology as that of gold, silver and other metal craftworks.

[0024] The technical effects achieved by the present invention are:

[0025] The present invention adopts a linkage design of the pushing part and the disengaging part, combined with the cooperation of the elastic reset part, the elastic pushing part and the limiting wheel, to realize the automatic demoulding and mechanism resetting of the casting. After the molding is completed, the pushing cylinder contracts and drives the linkage frame to slide. The extrusion block in the linkage frame first squeezes the limiting wheel, pushing the pushing seat and the pushing rod out of the molding part, and pushing the casting out of the fixed template. Subsequently, the linkage frame continues to slide to drive the disengaging rod of the disengaging part to extend, further pushing the casting to separate from the pushing rod. When the pushing rod moves to the maximum stroke, the disengaging part applies pressure to force the casting to fall off completely. After the demoulding is completed, the elastic reset part and the elastic recovery part respectively drive the pushing part and the disengaging part to automatically contract and reset. The entire process is driven by the power of a single pushing cylinder to link multiple components, without the need for manual intervention, which significantly improves the demoulding efficiency and continuity.

[0026] The present invention adopts a closed matching design of the fixed plate and the movable plate and the setting of the exhaust holes, which effectively solves the problem of casting defects caused by gas retention in traditional casting. When the fixed plate and the movable plate are assembled, a closed casting cavity is formed, and the closed structure integrally formed inside ensures the sealing of the mold. The push-in injection part drives the push-in injection column through the push-in injection cylinder to inject the molten metal into the cavity under high pressure. The molten metal quickly fills the mold under high pressure, and at the same time, the gas in the cavity is discharged through the exhaust holes on the fixed plate to avoid residual bubbles. In addition, the connection design between the push-in injection tube and the guide tube ensures the stability of the injection of the molten metal. Through the synergistic effect of high-pressure injection and exhaust, the molten metal fully fits the inner wall of the mold, which significantly improves the quality of the casting.

[0027] The present invention integrates the functions of pushing, molding, and demoulding on a fixed base, optimizing the compactness of the equipment structure. The pushing part is directly connected to the molding part, and the pushing part and the disengaging part are nested inside the molding part, reducing the space occupied by independent components in traditional equipment. The key innovation lies in the single power source of the pushing cylinder driving the multi-link linkage: when the cylinder is extended, the dynamic mold plate and the fixed mold plate are driven to close and complete the injection molding; when it contracts, the linkage frame synchronously triggers the step-by-step demoulding action of the pushing part and the disengaging part; the limiting wheel cooperates with the pushing groove and the receiving groove in the mounting seat to ensure that the stroke of the pushing rod and the disengaging rod is accurately controlled to avoid jamming. This design not only simplifies the power system, but also realizes the automation of the entire process of mold opening, demoulding, and resetting through mechanical linkage, reducing the complexity of the equipment and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a process flow chart of an embodiment of the present invention;

[0029] Figure 2 It is an overall schematic diagram of an embodiment of the present invention;

[0030] Figure 3 It is an overall exploded view of an embodiment of the present invention;

[0031] Figure 4This is an exploded view of the injection unit of an embodiment of the present invention;

[0032] Figure 5 This is an exploded view of a pushing portion of an embodiment of the present invention;

[0033] Figure 6 This is an exploded view of the separation portion of an embodiment of the present invention;

[0034] Figure 7 This is an exploded view of a forming portion of an embodiment of the present invention;

[0035] Figure 8 Schematic diagram of a movable platen and a fixed platen according to an embodiment of the present invention;

[0036] Figure 9 2. It is a schematic diagram of the pushing portion extending out of an embodiment of the present invention;

[0037] Figure 10 This is an embodiment of the present invention Figure 8 Schematic diagram at point A in the middle;

[0038] Figure 11 This is a schematic diagram of the assembly of the forming portion of an embodiment of the present invention;

[0039] Figure 12 This is an embodiment of the present invention Figure 10 Schematic diagram at point B in the middle;

[0040] Figure 13 This is a schematic diagram of the forming portion of an embodiment of the present invention about to be assembled;

[0041] Figure 14 This is an embodiment of the present invention Figure 12 Schematic diagram at point C in the middle;

[0042] Figure 15 2. It is a schematic diagram of the contraction of the separation portion of an embodiment of the present invention;

[0043] Figure 16 This is an embodiment of the present invention Figure 14 Schematic diagram at point D in the middle;

[0044] Figure 17 is a schematic diagram of the elongation of the detachment portion of an embodiment of the present invention;

[0045] Figure 18 This is an embodiment of the present invention Figure 16 Schematic diagram at point E in the middle.

[0046] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0047] 1. Fixed base; 2. Molding part; 201. Fixed seat; 202. Fixed template; 203. Pushing cylinder; 204. Sliding seat; 205. Moving template; 206. Sliding rod; 207. Connecting frame; 208. Linkage frame; 2081. Extrusion block; 3. Pushing part; 301. Mounting seat; 3011. Pushing groove; 3012. Receiving groove; 302. Pushing seat; 303. Elastic return member; 304. Movable seat; 305. Elastic pushing member; 306. Limiting wheel; 307. Pushing rod; 4. Disengagement part; 401. Disengagement seat; 402. Elastic return member; 403. Disengagement rod; 5. Injection part; 501. Injection tube; 502. Injection column; 503. Injection cylinder; 504. Guide tube. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0049] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0050] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it constitute a separate or selective embodiment that is mutually exclusive of other embodiments.

[0051] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0052] See also Figures 1 to 18 As shown, the present invention provides a casting process for gold, silver and other metal crafts and a processing process, including:

[0053] Step 1: inject the molten metal into the injection part 5 and press it into the forming part 2 at high speed and high pressure to shape it, specifically:

[0054] Step 2: The push-in portion 5 contracts to create negative pressure, so that the casting remains fixed when the molding portion 2 separates;

[0055] Step 3: When the molding part 2 is separated, the pushing part 3 is squeezed to eject the casting through the pushing part 3, thereby completing the initial separation of the casting from the molding part 2;

[0056] Step 4: As the forming part 2 continues to open, the separation part 4 is driven to extend and push the casting out. If the casting is not separated, the casting and the pushing part 3 are driven to move out together. When the opening distance of the forming part 2 reaches the limit, the separation part 4 applies pressure to forcibly separate the casting, realizing the linkage demoulding of the pushing part 3 and the separation part 4;

[0057] Step 5: After the casting is ejected, the molding part 2 is closed to reset the pushing part 3 and the separating part 4, and wait for the next injection molding.

[0058] In the above steps, the specific operation process is as follows: the push cylinder 203 drives the movable platen 205 to assemble with the fixed platen 202 to form a closed cavity, and the closed ridge of the fixed platen 202 is inserted into the matching groove of the movable platen 205, and the gap between the two is controlled at 0.05-0.2mm;

[0059] The molten metal is injected into the injection tube 501 through the guide tube 504. The injection cylinder 503 drives the injection column 502 to inject the molten metal into the closed cavity formed by the fixed mold plate 202 and the movable mold plate 205 at a pressure of 8-15 MPa within 3-8 seconds. The melt filling speed is controlled at 20-50 cm 3 / s;

[0060] When the push cylinder 203 retracts, the linkage frame 208 moves to trigger two-stage demoulding inside the fixed template 202:

[0061] Primary demoulding: The linkage frame 208 moves to first drive the push rod 307 to generate a thrust of 3-8N, so that the push rod 307 extends out of the interior of the fixed mold plate 202, forcing the casting to separate from the fixed mold plate 202;

[0062] Secondary demoulding: The linkage frame 208 continues to move, and the push rod 307 is squeezed by the elastic reset member 303 to reset and slide. At the same time, the linkage frame 208 drives the separation rod 403 to extend into the interior of the fixed template 202 and contact the casting driven by the reset and sliding push rod 307. As the separation rod 403 continues to extend, the casting is separated from the push rod 307, completing the complete separation of the casting;

[0063] When the pushing cylinder 203 extends to reset, the elastic restoring member 402 drives the separation portion 4 to retract and reset until the pushing cylinder 203 pushes the fixed plate 202 and the movable plate 205 to be spliced together, completing the reset.

[0064] See also Figures 1 to 18As shown, a processing technology for casting gold, silver and other metal crafts includes a fixed base 1, a molding part 2 is fixedly connected to the upper portion of the fixed base 1, a pushing part 3 is slidably provided on the upper portion of the fixed base 1, a separation part 4 is slidably provided inside the pushing part 3, the pushing part 3 is fixedly connected to the molding part 2, and a push-injection part 5 is further provided on the upper portion of the fixed base 1, and an output end of the push-injection part 5 is connected to the interior of the molding part 2;

[0065] The pushing part 3 includes a mounting seat 301, a pushing seat 302, an elastic reset member 303, a movable seat 304, an elastic pushing member 305, a limiting wheel 306 and a pushing rod 307. The mounting seat 301 is fixedly connected to the upper part of the fixed base 1, the mounting seat 301 is internally slidingly provided with a pushing seat 302, an elastic reset member 303 is provided between the pushing seat 302 and the mounting seat 301, the pushing seat 302 is internally slidingly provided with a movable seat 304, an elastic pushing member 305 is provided between the movable seat 304 and the pushing seat 302, the movable seat 304 is internally provided with a limiting wheel 306, and one side of the pushing seat 302 is fixedly connected to the pushing rod 307, and the pushing rod 307 is internally slidingly connected to the forming part 2.

[0066] Specifically, the molten metal is first injected into the interior of the pushing part 5, and the metal melt is injected into the interior of the forming part 2 in the assembled state at high speed and high pressure through the pushing part 5 for molding. The pushing pressure is controlled in two stages: the initial stage is 8-12MPa for rapid filling, and the final stage is 12-15MPa for shrinkage compensation and holding pressure for 3-8 seconds. After the molding of the molten metal is completed, the pushing part 5 shrinks to form a negative pressure area inside, and the negative pressure is used to adsorb the casting inside the fixed template 202. Then, after the molding part 2 is separated and opened, the casting can be fixed inside the fixed template 202 first.

[0067] As the forming part 2 separates, the limiting wheel 306 of the pushing part 3 can be squeezed to slide inside the mounting seat 301, so that the limiting wheel 306 drives the sliding seat 204 and the pushing seat 302 to slide together, so that the pushing rod 307 can slide out of the interior of the forming part 2, and the formed casting is pushed out of the interior of the forming part 2 by the extension of the pushing rod 307. At this time, the casting may still fit tightly with the pushing rod 307 and cannot fall off, thereby realizing the separation of the casting from the forming part 2.

[0068] As the forming part 2 continues to open, the forming part 2 loses its pressure on the limiting wheel 306. At this time, the pushing seat 302 is squeezed by the elastic reset member 303 and slides in the opposite direction, so that the pushing seat 302 drives the pushing rod 307 to retract into the interior of the forming part 2. Then, the opening of the forming part 2 drives the separation part 4 to extend out of the interior of the forming part 2 and push the casting after molding to move out of the interior of the forming part 2 again. If the casting and the forming part 2 are still difficult to separate, the separation part 4 will drive the casting and the pushing rod 307 to move out of the interior of the forming part 2 together. The molding part 2 is opened until the opening distance reaches the maximum movement distance of the push rod 307. At this time, the molding part 2 continues to open and drives the separation part 4 to continue to move, while the push rod 307 stops moving because it has reached the maximum movement distance. The separation part 4 applies pressure on the casting. The huge pressure of the separation part 4 separates the casting from the push rod 307 and falls. At this point, by utilizing the power when the molding part 2 is opened, the push part 3 and the separation part 4 form a front-to-back pushing linkage, thereby achieving complete separation of the casting and providing a space for the next molding of the casting.

[0069] Then, after the casting is discharged from the interior of the molding part 2, the pushing part 3 and the separation part 4 are retracted into the interior of the molding part 2 through the splicing of the molding part 2, waiting for the next molten metal to be pushed into the interior of the molding part 2 by the injection part 5.

[0070] See also Figure 6 、 Figure 10 、 Figure 12 、 Figure 16 、 Figure 14 and Figure 18 As shown, the disengagement portion 4 includes a disengagement seat 401, an elastic return member 402 and a disengagement rod 403. The disengagement seat 401 is slidably arranged inside the mounting seat 301, and the elastic return member 402 is arranged between the disengagement seat 401 and the mounting seat 301. One end of the disengagement rod 403 is fixedly connected to the disengagement seat 401, and the other end of the disengagement rod 403 is slidably connected to the inside of the forming portion 2.

[0071] By sliding the forming part 2 when it is opened, after the forming part 2 contacts the disengagement seat 401, the forming part 2 can drive the disengagement seat 401 to slide, so that the disengagement seat 401 drives the disengagement rod 403 to slide out of the interior of the forming part 2, thereby utilizing the extension of the disengagement rod 403 to further separate the initially separated casting inside the forming part 2 from the push rod 307.

[0072] Further explanation is needed: after the molding part 2 pushes the disengagement seat 401 to drive the disengagement rod 403 to extend a certain distance, the pushing part 3 will lose the extrusion of the molding part 2. At this time, the pushing part 3 is squeezed by the elastic reset part 303 and performs reset sliding. Since the disengagement rod 403 has extended a certain distance from the molding part 2 and has formed a bulge inside the molding part 2, the reset sliding of the pushing part 3 causes the push rod 307 to drive the connected casting to move quickly toward the interior of the molding part 2. Due to the bulge formed by the extension of the disengagement rod 403, the casting cannot re-enter the interior of the molding part 2, and the impact force when the pushing part 3 is reset also acts on the disengagement rod 403 through the casting, causing the casting to be separated from the push rod 307 by the impact force, further promoting the separation of the casting from the push rod 307.

[0073] Furthermore, even if the impact force when the pushing part 3 recovers causes the casting to still not separate from the pushing rod 307, then when the maximum extension distance of the disengagement rod 403 when pushed by the forming part 2 is greater than the maximum extension distance of the pushing rod 307, the disengagement rod 403 can slide and continue to apply pressure to the casting at the pushing rod 307, thereby ensuring that the casting can fall off from the pushing rod 307.

[0074] By applying a variety of separation forces to the casting, it is ensured that the casting can be completely separated from the push rod 307 and the interior of the forming part 2, thereby achieving complete separation of the casting.

[0075] See also Figures 2 to 18 As shown, the forming part 2 includes a fixed seat 201, a fixed template 202, a pushing cylinder 203, a sliding seat 204, a movable template 205, a sliding rod 206, a connecting frame 207 and a linkage frame 208. The fixed seat 201 is fixedly connected to the fixed base 1, the fixed template 202 is fixedly connected to the interior of the fixed seat 201 by bolts, the pushing cylinder 203 is fixedly connected to the fixed base 1, the sliding seat 204 is slidably arranged inside the fixed base 1, and the sliding seat 204 is fixedly connected to the output end of the pushing cylinder 203, the movable template 205 is fixedly connected to the interior of the sliding seat 204 by bolts, one end of the sliding rod 206 is fixedly connected to the sliding seat 204, the outer edge of the sliding rod 206 is slidably connected to the interior of the fixed seat 201, the connecting frame 207 is fixedly connected to the other end of the sliding rod 206, the linkage frame 208 is slidably connected to the mounting seat 301, and the linkage frame 208 is fixedly connected to the middle part of the connecting frame 207, and the interior of the linkage frame 208 is slidably connected to the outer edge of the disengagement rod 403.

[0076] By extending the output end of the push cylinder 203, the sliding seat 204 is driven to slide inside the fixed base 1. The sliding seat 204 and the fixed seat 201 are in a horizontal corresponding state, so that the sliding of the sliding seat 204 can be spliced with the fixed seat 201. The splicing of the sliding seat 204 and the fixed seat 201 can make the movable template 205 and the fixed template 202 inside each of them splice, so that a closed casting cavity is formed between the movable template 205 and the fixed template 202. The casting cavity is connected to the interior of the push-injection part 5, and the molten metal is injected into the interior of the casting cavity through the push-injection part 5 for molding.

[0077] At the same time, as the pushing cylinder 203 extends and drives the sliding seat 204 to move together, the sliding seat 204 drives the sliding rod 206 to slide inside the fixed seat 201, and the interior of the fixed seat 201 provides a limit and guide for the sliding of the sliding rod 206, thereby improving the stability of the sliding seat 204 when sliding; the sliding of the sliding rod 206 can push and connect the frame 207 and the linkage frame 208 to slide together. During the sliding process of the linkage frame 208, the linkage frame 208 first gradually loses the extrusion of the separation portion 4, so that the separation portion 4 is subjected to the elastic restoring force of the elastic restoring member 402 and shrinks into the interior of the forming portion 2 until the separation portion 4 is completely retracted into the interior of the forming portion 2. When the push cylinder 203 is extended, the sliding seat 204 and the fixed seat 201 do not enter the fitting state. At this time, the pushing part 3 is in the state of contraction and enters the interior of the molding part 2. As the linkage frame 208 continues to slide, the linkage frame 208 can squeeze the limiting wheel 306 and move a distance over the limiting wheel 306. At this time, the extension distance of the pushing cylinder 203 reaches the maximum, and the sliding seat 204 and the fixed seat 201 enter the fitting state. By utilizing the stroke force of the pushing cylinder 203 during extension or contraction, not only can the opening and closing between the movable template 205 and the fixed template 202 be realized, but also the pushing part 3 and the disengagement part 4 can be driven to extend to separate the casting from the interior of the molding part 2, thereby fully utilizing the power of the pushing cylinder 203.

[0078] See also Figure 8 As shown, a closed ridge is integrally formed at the fixed template 202, and the closed ridge cooperates with the interior of the movable template 205. An exhaust hole is provided at the closed ridge, and the diameter of the exhaust hole of the fixed template 202 is 0.3-0.8 mm. When the pusher 5 injects the molten metal between the fixed template 202 and the movable template 205, the molten metal squeezes the air inside the casting cavity formed between the fixed template 202 and the movable template 205, and the air is discharged through the exhaust hole at the closed ridge, providing an exhaust channel for the air inside the casting cavity through the exhaust hole, thereby avoiding bubbles inside the casting caused by air and affecting the quality of the casting.

[0079] See also Figure 7 as well as Figures 9 to 14 As shown, the interior of the linkage frame 208 is fixedly connected with an extrusion block 2081, and the extrusion block 2081 cooperates with the limiting wheel 306. The protruding part of the extrusion block 2081 is set to an isosceles trapezoid, and the inclination angle of the trapezoid is 15-30°. The inclined surfaces at both ends of the trapezoid correspond to the limiting wheel 306. In the process of the linkage frame 208 driving the extrusion block 2081 to move, the inclined surface of the extrusion block 2081 can squeeze the limiting wheel 306. After being squeezed by the extrusion block 2081, the limiting wheel 306 can be pushed by the extrusion block 2081. After being pushed, the limiting wheel 306 can drive the pushing seat 302 and the movable seat 304 to move together, thereby realizing convenient squeezing of the limiting wheel 306 by the extrusion block 2081.

[0080] See also Figures 9 to 14 As shown, a push-out groove 3011 and a receiving groove 3012 are provided inside the mounting seat 301 , and the insides of the push-out groove 3011 and the receiving groove 3012 match the outer edge of the limiting wheel 306 .

[0081] The position of the pushing groove 3011 is matched with the longest extension distance of the pushing part 3. When the pushing cylinder 203 of the forming part 2 is retracted, the limiting wheel 306 is between the pushing groove 3011 and the receiving groove 3012. The limiting wheel 306 is first squeezed by the squeezing block 2081 and moves toward the pushing groove 3011. The entire pushing part 3 is squeezed and gradually extends along with the squeezing block 2081 until the limiting wheel 306 is squeezed to the position of the pushing groove 3011. At this time, the pushing part 3 is at its most extended position. The large distance, as the extrusion block 2081 continues to move, the limiting wheel 306 is subjected to the oblique force of one end of the extrusion block 2081, causing the limiting wheel 306 to slide horizontally inside the movable seat 304, so that the limiting wheel 306 is gradually stuck in the inside of the ejection groove 3011. After the limiting wheel 306 is stuck in the inside of the ejection groove 3011, the extrusion block 2081 can smoothly move over the limiting wheel 306 and continue to move. At this time, the linkage frame 208 contacts the disengagement part 4, and enters the state of the linkage frame 208 pushing the disengagement part 4.

[0082] After the extrusion block 2081 moves past the position of the limiting wheel 306, the extrusion force of the limiting wheel 306 disappears, and the pushing portion 3 is reset by the elastic extrusion of the elastic reset member 303, and the pushing portion 3 enters a retracted state, so that the limiting wheel 306 is forced to move out of the inside of the pushing groove 3011, and the limiting wheel 306 moves horizontally inside the movable seat 304, and the limiting wheel 306 returns to the state before it is stuck in the inside of the pushing groove 3011. At the same time, the limiting wheel 306 moves with the pushing portion 3 until the pushing portion 3 is in a fully retracted state. The linkage between the limiting wheel 306, the pushing groove 3011 and the extrusion block 2081 is realized to achieve a reciprocating sliding of the pushing portion 3.

[0083] The position of the receiving groove 3012 is in a retracted state with the pushing portion 3, and the position of the limiting wheel 306 after being squeezed and pushed by the pushing seat 302 is matched. When the pushing cylinder 203 performs an extension stroke, and the inclined surface at the other end of the squeezing block 2081 contacts the limiting wheel 306, since the pushing portion 3 is already in a retracted state, the limiting wheel 306 can squeeze the movable seat 304 to slide inside the pushing seat 302 until the limiting wheel 306 is squeezed to the position of the receiving groove 3012, and under the continued squeezing of the squeezing block 2081, the limiting wheel 306 slides horizontally inside the movable seat 304 and is stuck in the inside of the receiving groove 3012, so that the squeezing block 2081 can move over the limiting wheel 306 again.

[0084] After the extrusion block 2081 moves over the limiting wheel 306, the movable seat 304 is elastically squeezed by the elastic pushing member 305, and the movable seat 304 squeezes the limiting wheel 306 to slide horizontally, so that the limiting wheel 306 moves out of the interior of the receiving groove 3012 again and restores the position before being squeezed by the limiting wheel 306. After the extrusion block 2081 passes over the limiting wheel 306, the extension stroke of the pushing cylinder 203 reaches the maximum, and the forming part 2 enters the splicing state. The reset linkage after the forming part 2 is spliced is achieved through the linkage cooperation between the limiting wheel 306, the receiving groove 3012 and the extrusion block 2081.

[0085] See also Figure 5 As shown, a horizontal sliding groove is provided inside the movable seat 304, and the interior of the sliding groove is slidably connected to the limiting wheel 306. The sliding groove is used to guide and limit the limiting wheel 306 when it slides into the pushing groove 3011 and the receiving groove 3012, thereby preventing the limiting wheel 306 from being offset and tilted, which may cause it to get stuck and cause rigid equipment linkage.

[0086] See also Figure 5 As shown, a square groove is provided inside the pushing seat 302, and the inside of the square groove cooperates with the limiting wheel 306. The square groove can provide a movable space when the limiting wheel 306 is squeezed and slid by the movable seat 304, thereby avoiding the axial position of the limiting wheel 306 from getting stuck. At the same time, when the limiting wheel 306 is squeezed and pushed by the squeezing block 2081, the pushing force of the squeezing block 2081 can be transmitted to the pushing seat 302 through the square groove, so that the pushing seat 302 moves together with the limiting wheel 306, realizing the linkage between the pushing seat 302 and the limiting wheel 306.

[0087] See also Figures 2 to 4As shown, the injection part 5 includes an injection tube 501, an injection column 502, an injection cylinder 503 and a guide tube 504. The injection tube 501 is fixedly connected to the fixed base 1, and the output end of the injection tube 501 is between the fixed template 202 and the movable template 205. The injection column 502 is slidably arranged inside the injection tube 501, the injection cylinder 503 is fixedly connected to the fixed base 1, the output tube of the injection cylinder 503 is fixedly connected to the injection column 502, the guide tube 504 is fixedly connected to the upper part of the injection tube 501, and the interior of the guide tube 504 is connected to the interior of the injection tube 501, and the inner wall of the guide tube 504 is coated with a 0.1-0.3mm thick titanium nitride coating.

[0088] The molten metal is injected into the interior of the injection tube 501 through the guide tube 504, and the injection cylinder 503 drives the injection column 502 to slide inside the injection tube 501. The sliding of the injection column 502 injects the molten metal inside the injection tube 501 into the interior of the molding part 2 for molding. The injection cylinder 503 can drive the injection column 502 to extrude the molten metal at a pressure of 5-20MPa, completing the high-speed and high-pressure injection of the molten metal. By injecting the molten metal into the interior of the molding part 2 at high temperature and high pressure, the degree of fit between the molten metal and the interior of the molding part 2 can be improved, thereby improving the quality of the casting.

[0089] Before demolding the casting, the ejector cylinder 503 contracts and drives the ejector column 502 to form a negative pressure zone inside the ejector tube 501, and the negative pressure is used to fix the casting inside the fixed template 202, preventing the casting from being fixed inside the movable template 205 and affecting the subsequent demolding of the casting.

[0090] The working principle of the present invention is as follows: first, the molten metal melt is injected into the interior of the push injection part 5, and the metal melt is injected into the interior of the forming part 2 in the assembled state at high speed and high pressure through the push injection part 5 for shaping. Then, after the metal melt is shaped, the forming part 2 is separated and opened to expose the casting after shaping.

[0091] As the forming part 2 separates, the limiting wheel 306 of the pushing part 3 can be squeezed to slide inside the mounting seat 301, so that the limiting wheel 306 drives the sliding seat 204 and the pushing seat 302 to slide together, so that the pushing rod 307 can slide out of the interior of the forming part 2, and the formed casting is pushed out of the interior of the forming part 2 by the extension of the pushing rod 307. At this time, the casting may still fit tightly with the pushing rod 307 and cannot fall off, thereby realizing the separation of the casting from the forming part 2.

[0092] As the forming part 2 continues to open, the forming part 2 loses its pressure on the limiting wheel 306. At this time, the pushing seat 302 is squeezed by the elastic reset member 303 and slides in the opposite direction, so that the pushing seat 302 drives the pushing rod 307 to retract into the interior of the forming part 2. Then, the opening of the forming part 2 drives the separation part 4 to extend out of the interior of the forming part 2 and push the casting after molding to move out of the interior of the forming part 2 again. If the casting and the forming part 2 are still difficult to separate, the separation part 4 will drive the casting and the pushing rod 307 to move out of the interior of the forming part 2 together. The molding part 2 is opened until the opening distance reaches the maximum movement distance of the push rod 307. At this time, the molding part 2 continues to open and drives the separation part 4 to continue to move, while the push rod 307 stops moving because it has reached the maximum movement distance. The separation part 4 applies pressure on the casting. The huge pressure of the separation part 4 separates the casting from the push rod 307 and falls. At this point, by utilizing the power when the molding part 2 is opened, the push part 3 and the separation part 4 form a front-to-back pushing linkage, thereby achieving complete separation of the casting and providing a space for the next molding of the casting.

[0093] Then, after the casting is discharged from the interior of the molding part 2, the pushing part 3 and the separation part 4 are retracted into the interior of the molding part 2 through the splicing of the molding part 2, waiting for the next molten metal to be pushed into the interior of the molding part 2 by the injection part 5.

[0094] The foregoing is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained herein shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. A process for casting gold, silver and other metal crafts, characterized in that: include: Step 1: inject the molten metal into the injection part and press it into the forming part at high speed and high pressure to shape it; Step 2: The pusher part contracts to create negative pressure, which keeps the casting fixed when the molding part separates; Step 3: When the molding part is separated, the pushing part is squeezed to eject the casting through the pushing part, completing the initial separation of the casting and the molding part; Step 4: As the forming part continues to open, the separation part is driven to extend and push the casting out. If the casting is not separated, the casting and the pushing part are driven to move out together. When the opening distance of the forming part reaches the limit, the separation part applies pressure to force the casting to separate, realizing the linkage demoulding of the pushing part and the separation part; Step 5: After the casting is ejected, the molding unit closes the mold to reset the pushing unit and the disengaging unit, waiting for the next injection molding.

2. A process for casting gold, silver and other metal crafts according to claim 1, characterized in that: The process of injecting the molten metal into the push injection part is divided into two stages of pressure control: the initial stage is 8-12MPa for rapid filling, the final stage is 12-15MPa for holding pressure for 3-8 seconds to feed the shrinkage, and the melt filling speed is controlled at 20-50cm 3 / s.

3. A process for casting gold, silver and other metal crafts according to claim 1, characterized in that: The forming part is arranged on a fixed base, the pushing part is slidably arranged on the upper part of the fixed base, the disengaging part is slidably arranged inside the pushing part, and the pushing part is connected to the forming part, the injection part is arranged on the upper part of the fixed base, and the output end of the injection part is communicated with the inside of the forming part.

4. A process for casting gold, silver and other metal crafts according to claim 3, characterized in that: The pushing part includes a mounting seat, a pushing seat, an elastic reset member, a movable seat, an elastic pushing member, a limiting wheel and a pushing rod. The mounting seat is fixedly connected to the upper portion of the fixed base, the mounting seat is slidingly provided with a pushing seat, an elastic reset member is provided between the pushing seat and the mounting seat, a movable seat is slidingly provided inside the pushing seat, an elastic pushing member is provided between the movable seat and the pushing seat, a limiting wheel is provided inside the movable seat, a horizontal sliding groove is provided inside the movable seat, the interior of the sliding groove is slidably connected to the limiting wheel, a pushing rod is fixedly connected to one side of the pushing seat, the interior of the pushing seat is provided with a square groove, the interior of the square groove cooperates with the limiting wheel, and the pushing rod is slidably connected to the interior of the forming part.

5. A process for casting gold, silver and other metal crafts according to claim 4, characterized in that: The disengagement portion includes a disengagement seat, an elastic return member and a disengagement rod. The disengagement seat is slidably arranged inside the mounting seat, the elastic return member is arranged between the disengagement seat and the mounting seat, one end of the disengagement rod is fixedly connected to the disengagement seat, and the other end of the disengagement rod is slidably connected to the interior of the forming portion.

6. A process for casting gold, silver and other metal crafts according to claim 5, characterized in that: The cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame. The cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame. The cam is fixedly mounted on the support frame 7. A process for casting gold, silver and other metal crafts according to claim 6, characterized in that: A closed ridge is integrally formed at the fixed template, and the closed ridge matches the interior of the movable template. An exhaust hole is provided at the closed ridge.

8. The process for casting gold, silver and other metal crafts according to claim 4, characterized in that: A pushing groove and a receiving groove are provided inside the mounting seat, and the insides of the pushing groove and the receiving groove match the outer edge of the limiting wheel.

9. The process for casting gold, silver and other metal crafts according to claim 6, characterized in that: The pushing part includes a pushing tube, a pushing column, a pushing cylinder and a guide tube. The pushing tube is fixedly connected to the fixed base, and the output end of the pushing tube is located between the fixed template and the movable template. The pushing column is slidably arranged inside the pushing tube, the pushing cylinder is fixedly connected to the fixed base, the output tube of the pushing cylinder is fixedly connected to the pushing column, the guide tube is fixedly connected to the upper part of the pushing tube, and the interior of the guide tube is communicated with the interior of the pushing tube.

10. A craftwork of casting gold, silver and other metals, characterized in that: The metal crafts are made by using the processing technology for casting gold, silver and other metal crafts according to any one of claims 1 to 9.

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