Mould for reducing weight of tin sculpture, tin sculpture and manufacturing method and correction method of tin sculpture

Abstract

The invention provides a mold for reducing the weight of a tin sculpture, and belongs to the technical field of artware manufacturing. The mold comprises a bottom fixing plate, an outer steel mold, a product pattern mold, a central gland, a core, an aluminum bone and a material supporting device. The structural design that the aluminum framework is wrapped by tin is adopted. The excellent characteristics of tin are completely reserved, the structural strength of the tin carving product is remarkably improved, the overall weight is reduced, the production cost is effectively saved, the deformation resistance is enhanced, and the machining efficiency is improved. Therefore, the tin sculpture product is a product which can be afforded by consumers and common people and can be well used.

Description

Technical Field

[0001] This invention relates to the field of handicraft manufacturing technology, and in particular to molds for reducing the weight of tin sculptures, tin sculptures, their manufacturing methods, and correction methods. Background Technology

[0002] Traditional tin sculptures suffer from extremely limited market acceptance and sluggish sales due to factors such as the high price of tin (approximately ten times that of aluminum), its heavy density, soft and easily deformable texture, low production efficiency, and expensive finished products. These products are primarily targeted at high-end consumers and are inaccessible to the general public. Summary of the Invention

[0003] In view of this, to address the technical problems of heavy weight, soft and easily deformed texture, and low production efficiency in traditional tin carving techniques, this invention provides molds, tin carving methods, and correction methods for reducing the weight of tin carvings. After years of research and experimentation, an innovative solution has been successfully developed: a structural design using tin to encapsulate an aluminum skeleton. This approach not only fully preserves the excellent properties of tin but also significantly improves the structural strength of tin carvings, reduces overall weight, effectively saves production costs, enhances resistance to deformation, and improves processing efficiency. As a result, tin carvings become affordable and usable products for consumers and the general public.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] In a first aspect, the present invention provides a mold for reducing the weight of tin engraving, comprising:

[0006] Bottom fixing plate;

[0007] The outer steel mold is set on the bottom fixed plate. It is a double-opening steel mold with a cooling system and a heating system arranged on it.

[0008] The product pattern mold, made of high-temperature resistant silicone, is set inside the outer steel mold;

[0009] A central pressure cap is provided on the outer steel mold and has a liquid inlet.

[0010] The core, located at the center of the mold, extends through the central pressure cap into the cavity formed by the outer steel mold, and is used to squeeze the molten solder.

[0011] The aluminum frame, serving as the skeleton for the tin sculpture, is placed inside the cavity, and its bottom has several through holes for the molten tin to enter and exit.

[0012] A material support device is installed on the bottom fixing plate and located at the bottom of the product pattern mold. It is used to support the product pattern mold and lift the product pattern mold and casting when the mold is opened.

[0013] Preferably, the outer steel mold is installed on both sides of the vertical casting press and is opened and closed by a hydraulic cylinder.

[0014] Preferably, the upper half of the product pattern mold is vertically cut on all four sides, while the lower half is not cut, and a reinforcing rib is provided in the middle.

[0015] Preferably, the core has a hollow structure with a hole in the middle that does not extend through the bottom of the core, for introducing a cooling or heating medium.

[0016] Preferably, it further includes:

[0017] The upper mold fixing plate is concentrically connected to the core.

[0018] Preferably, the material support device includes:

[0019] The material support rod is mounted on the bottom fixing plate;

[0020] A support block is disposed at the top of the material support rod and located at the bottom of the product pattern mold;

[0021] The material support rod drives the support block to lift the product pattern mold and the casting.

[0022] Preferably, the center cap and the aluminum frame are connected by an interference fit using a fixing pin.

[0023] Secondly, the present invention provides a method for reducing the weight of tin sculptures, comprising the following steps:

[0024] Step (1) Aluminum frame prefabrication

[0025] To fabricate an aluminum frame, small holes are machined on the open end face, and through holes are made at the bottom.

[0026] Step (2): Prepare the mold mentioned above for reducing the weight of the tin sculpture.

[0027] Start the heating system on the outer steel mold to preheat it, fix the product pattern mold on the support block, and put it into the outer steel mold;

[0028] Step (3), Aluminum frame installation and molten tin pouring

[0029] Heat the aluminum frame to the preset temperature and put it on the center cap. Pour molten tin into the mold through the inlet. Put down the center cap and aluminum frame into the cavity. The molten tin enters the interior through the through hole at the bottom of the aluminum frame and is level with the molten tin outside.

[0030] Step (4), Mold closing, extrusion and molding

[0031] Close the outer steel mold tightly, press the core downwards to squeeze the molten solder until the aluminum frame is completely wrapped, switch the heating system to the cooling system, and wait for the molten solder to solidify;

[0032] Step (5) Opening the mold and removing the parts

[0033] Switch the cooling system to a heating system to prevent the tin layer from sticking to the mold. Remove the core and center cap in sequence, open the outer steel mold, and the material support device lifts the product pattern mold and casting. Use air pressure to blow the product out of the product pattern mold to complete the production.

[0034] Thirdly, the present invention provides a tin-carved product, which is manufactured using the above-described method.

[0035] Fourthly, the present invention provides a method for correcting the above-mentioned tin-engraved products, comprising the following steps:

[0036] Clamping head installation: Install one chucking head with electric heating function in front of and behind each jaw of the three-jaw chuck. The outer layer of the chucking head is made of copper with fast heat conduction, and a stainless steel rod is embedded in the center for clamping the aluminum frame.

[0037] Heating the clamping head: The clamping head is energized and heated to a temperature above the melting point of tin;

[0038] Workpiece clamping and positioning: Align the tin-coated aluminum frame workpiece with the heated clamping head. When the clamping head contacts the outer tin layer of the workpiece, the tin layer melts. The 6 clamping heads clamp the inner aluminum frame. After clamping, the power is turned off and the temperature is reduced to ensure that the aluminum frame is firmly fixed.

[0039] Turning: Using the aluminum frame as a reference, turn the aluminum frame to correct the eccentricity of the inner and outer circles, control the concentricity within 0.05mm, and the tin foil thickness within 0.3mm;

[0040] Heating before unloading the workpiece: Before unloading the workpiece, reheat the clamping head to above the melting point of tin. After cooling down by turning off the power, release the clamping head and remove the workpiece.

[0041] Repairing pits: The six clamping pits left on the surface of the workpiece after turning are repaired and smoothed out with solder.

[0042] Compared with traditional tin engraving and its processes, this invention has the following beneficial effects:

[0043] (1) Lightweighting and cost optimization: The core breakthrough of the aluminum-tin composite structure reduces the specific gravity and weight of tin sculptures, as detailed below:

[0044] Structural design: Aluminum frame (specific gravity 2.7g / cm³) 3 The aluminum frame serves as the internal support framework, while the outer layer is wrapped with a tin layer (specific gravity 7.3g / cm3), replacing the solid structure of a pure tin sculpture. Through the "coating" process of the aluminum frame, molten tin enters through the through-hole at the bottom of the aluminum frame and is level with the external molten tin. This ensures the integrity of the tin layer while significantly reducing the overall weight compared to a pure tin sculpture.

[0045] Cost reduction: The price of aluminum raw materials is only 1 / 10 of that of tin, and the aluminum skeleton can account for 40%-50% of the workpiece volume, directly reducing raw material costs; at the same time, it reduces the amount of tin used, alleviating the market restrictions imposed by high tin prices.

[0046] Retaining the inherent functional advantages of tin: By extruding the core and filling the bottom hole of the aluminum frame with molten tin, the aluminum frame is completely wrapped in tin. The outer tin layer still has the environmental protection, hygiene, moisture-proof, freshness-preserving, sterilization and radiation-resistant properties of traditional tinware, thus solving the technical contradiction between "lightweight and functional retention".

[0047] (2) Strength enhancement and deformation prevention: Collaborative innovation of mold and process

[0048] Aluminum frame supports solve the problem of tin's softness and easy deformation: Tin has a hardness of only 5-6 HBS, and pure tin carvings are easily deformed by external forces; aluminum frame has a hardness of 60-150 HB, and as a rigid skeleton, it increases the overall strength of the workpiece by 3-5 times, solving the technical problem of traditional tinware being "easy to be bumped and deformed".

[0049] Mold positioning accuracy is guaranteed: The outer steel mold, product pattern mold, core and other components are designed coaxially, and with the guidance and positioning of the center pressure cap, the concentricity error between the aluminum frame and the tin layer is low, avoiding uneven stress and deformation caused by structural eccentricity.

[0050] The step-by-step temperature control process achieves uniform tin coating: the outer steel mold integrates heating and cooling systems, which, together with the downward pressing action of the core, allow the molten tin to fully coat the aluminum frame, without bubbles or shrinkage cavities. The tin layer thickness is controlled within 0.3mm, avoiding weak areas caused by excessively thin local areas.

[0051] (3) Production efficiency improvement: automated mold and demolding design

[0052] Double-opening mold and material support rod enable rapid prototyping: The outer steel mold adopts a left and right double-opening structure, which is driven by a hydraulic cylinder to open and close. Together with the material support rod, it lifts the product pattern mold and casting, replacing the traditional manual part removal, and greatly shortening the time of a single process.

[0053] The design of splitting the upper half of the product pattern mold while leaving the lower half unsplit solves the problem of difficult demolding of complex patterns. Combined with 12kg air pressure blowing, it achieves automated demolding, reduces the intensity of manual operation, reduces workpiece damage caused by manual handling, and lowers the defect rate.

[0054] Heated positioning of the chuck shortens the correction process: During subsequent turning and correction, a copper chuck with electric heating function (heated to above 232℃ to melt the surface tin and directly clamp the internal aluminum frame) eliminates the traditional straightening process, achieving precise turning based on the aluminum frame, with concentricity controlled within 0.05mm, thus improving processing efficiency.

[0055] (4) Advantages of process stability and resource recycling

[0056] Improved mold life and material utilization:

[0057] The product pattern mold is resistant to high temperature (600℃) and has reinforcing ribs to avoid cracking caused by repeated opening and closing, thus increasing its service life. The outer steel mold is made of steel mold material and can be reused for a long time, reducing mold replacement costs.

[0058] The composite structure of aluminum frame and tin layer reduces tin waste, and at the same time, the amount of molten tin can be precisely controlled through the cavity, greatly improving the utilization rate of molten tin.

[0059] Resource recycling and market penetration: By using aluminum frames to replace some of the tin materials, the dependence on high-priced tin raw materials is reduced, while the price of end products is lowered, enabling tin sculptures to move from a "high-end niche" market to the mass consumer market.

[0060] In summary, this invention, through the synergistic innovation of "aluminum-tin composite structure", "automated temperature-controlled mold", and "step-by-step molding process", fundamentally solves the core pain points of traditional tin carving, which are "heavy, expensive, soft, and inefficient", while retaining the excellent properties of tin. It achieves a quadruple breakthrough of "lightweight, low cost, high strength, and high efficiency", and has both technological innovation and market application value. Attached Figure Description

[0061] Figure 1 This is a schematic diagram of the structure of the mold for reducing the weight of tin engraving provided by the present invention;

[0062] In the diagram, 1. Bottom fixing plate; 2. Outer steel mold; 3. Product pattern mold; 4. Center pressure cap; 5. Core; 6. Cavity; 7. Aluminum frame; 8. Through hole; 9. Hydraulic cylinder; 10. Upper mold fixing plate; 11. Material support rod; 12. Support block. Detailed Implementation

[0063] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0064] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0065] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0066] like Figure 1 As shown, the present invention provides a mold for reducing the weight of tin engraving, comprising:

[0067] The bottom fixing plate 1 is preferably located at the bottom of the mold and is fixed in conjunction with the outer steel mold 2 and the product pattern mold 3 described below to ensure overall coaxiality.

[0068] The outer steel mold 2, mounted on the bottom fixed plate 1, is a double-opening steel mold with a cooling system and a heating system. Preferably, the outer steel mold 2 is also equipped with a safety cover. The outer steel mold 2 is preferably installed on both sides of the vertical casting press and is driven to open and close by hydraulic cylinders 9. The outer steel mold 2 provides rigid support, and the molding rhythm is controlled by the heating system (preheating the mold to above the tin melting point) and the cooling system (accelerating the solidification of the molten tin), improving production efficiency. The double-opening design facilitates the removal of the product pattern mold 3 and the casting.

[0069] Product pattern mold 3, made of high-temperature resistant silicone, is placed inside the outer steel mold 2. Preferably, it is a silicone mold. This product pattern mold 3 is preferably placed inside the outer steel mold 2, with its bottom surface engaging with the bottom fixing plate 1 via a fixed end face, and placed on a material support device. Its upper half is vertically cut open on all four sides to allow the aluminum frame 7 to pass through smoothly, while the lower half remains uncut. A reinforcing rib is preferably added between the upper and lower molds. The product pattern mold 3 is made of high-temperature resistant molten tin (melting point 231.79℃) for casting, and its flexible material facilitates demolding. The cut-open design of the upper half solves the problem of difficult removal after complex patterns are formed, and the reinforcing rib prevents mold cracking.

[0070] A central cap 4, mounted on the outer steel mold 2, has a liquid inlet. A vertical casting press pours tin into the cavity 6 through the liquid inlet. In this invention, the central cap 4 and the aluminum frame 7 are connected by an interference fit with fixing pins. The fixing pins position the aluminum frame 7, ensuring that the aluminum frame 7 is concentric with the tin layer. For example, if the bottom surface of the central cap 4 has three fixing pins, and the open end of the aluminum frame 7 has three small holes that are interference-fitted with the three fixing pins on the bottom surface of the cap, the aluminum frame 7 is fixed. The design of separating the central cap 4 from the aluminum frame 7 (disengaged by pulling out pins during mold opening) avoids damage to the casting.

[0071] The core 5, preferably located at the center of the mold, extends through the central pressure cap 4 into the cavity 6 formed by the outer steel mold 2, and can move up and down to squeeze molten solder. The core 5 has a hollow structure with a hole in the middle that does not penetrate the bottom of the core 5, for introducing a cooling or heating medium, preferably water.

[0072] The aluminum frame 7 serves as the skeleton for the tin sculpture and is placed inside the cavity 6. Several through holes 8 are provided at its bottom for the molten tin to enter and exit.

[0073] A material support device, disposed on the bottom fixing plate 1 and located at the bottom of the product pattern mold 3, is used to support the product pattern mold 3 and lift the product pattern mold 3 and the casting during mold opening. The material support device includes:

[0074] Material support rod 11 is mounted on the bottom fixing plate 1;

[0075] The support block 12 is disposed on the top of the material support rod 11 and located at the bottom of the product pattern mold 3;

[0076] The material support rod 11 drives the support block 12 to lift the product pattern mold 3 and the casting.

[0077] This invention also includes:

[0078] The upper mold fixing plate 10 is concentrically connected to the core 5. The upper mold fixing plate 10 is preferably located at the top of the mold and is used to fix the core 5; the bottom fixing plate 1 is located at the bottom of the mold and is fixed in conjunction with the outer steel mold 2 and the product pattern mold 3 to ensure overall coaxiality, uniform distribution of molten solder and precise positioning of the aluminum frame 7.

[0079] Preferably, the material support device includes:

[0080] Material support rod 11 is mounted on the bottom fixing plate 1;

[0081] The support block 12 is disposed on the top of the material support rod 11 and located at the bottom of the product pattern mold 3;

[0082] The material support rod 11 drives the support block 12 to lift the product pattern mold 3 and the casting, and with the help of 12kg air pressure blowing, the part can be automatically picked up, reducing the intensity of manual operation.

[0083] In this invention, it is preferable to have a hole in the bottom fixing plate 1, through which the material support rod 11 passes and is interference-fitted with the hole, and the material support rod 11 can slide in the hole.

[0084] The present invention also provides a method for reducing the weight of tin engravings, comprising the following steps:

[0085] Step (1), aluminum frame 7 prefabrication

[0086] Fabricate an aluminum frame 7, with small holes machined on the open end face and through holes 8 at the bottom. Specifically, fabricate an aluminum frame 7, with 3 small holes machined on the open end face for engagement with the fixing pin of the central pressure cap 4, and multiple through holes 8 drilled at the bottom for the inlet and outlet of molten solder.

[0087] Step (2): Prepare the mold mentioned above for reducing the weight of the tin sculpture.

[0088] Start the heating system on the outer steel mold 2 for preheating, fix the product pattern mold 3 on the material support device, and place it inside the outer steel mold 2. For example, fix the product pattern mold 3 on the support block 12 and place it inside the outer steel mold 2.

[0089] Step (3), Aluminum frame 7 installation and molten tin pouring

[0090] The aluminum frame 7 is heated to a preset temperature and fitted onto the central pressure cap 4. Molten solder is poured into the mold through the inlet. The central pressure cap 4 and aluminum frame 7 are then lowered into the cavity 6. The molten solder enters the cavity through the through hole 8 at the bottom of the aluminum frame 7, leveling with the external molten solder. For example, the aluminum frame 7 is heated to 260°C and fitted with the central pressure cap 4 via a fixing pin. Molten solder is poured into the product pattern mold 3. The central pressure cap 4 and aluminum frame 7 are then lowered. The aluminum frame 7 enters the cavity 6 through the guide port, and the molten solder enters the cavity through the through hole 8 at the bottom of the aluminum frame 7, leveling with the external molten solder.

[0091] Step (4), Mold closing, extrusion and molding

[0092] Close the outer steel mold 2 tightly, and press the core 5 downwards to squeeze the molten solder until the aluminum frame 7 is completely wrapped. Switch the heating system to the cooling system and wait for the molten solder to solidify. For example, close the outer steel mold 2 tightly, and press the core 5 downwards to squeeze the molten solder until the aluminum frame 7 is completely wrapped. Switch the heating system to the cooling system, and after the molten solder has solidified, fill the three small holes at the top of the aluminum frame 7 with a soldering gun.

[0093] Step (5) Opening the mold and removing the parts

[0094] Switching from a cooling system to a heating system to prevent the solder layer from sticking to the mold, the core 5 and the central pressure cap 4 are removed sequentially, and the outer steel mold 2 is opened. The material support device lifts the product pattern mold 3 and the casting, and the product is blown out of the product pattern mold 3 using air pressure, completing the manufacturing process. Alternatively, switching from a cooling system to a heating system to prevent the solder layer from sticking to the mold, the core 5 and the central pressure cap 4 are removed sequentially, and the outer steel mold 2 is opened. The material support rod 11 lifts the product pattern mold 3 and the casting, and the product is blown out of the silicone mold using 12 kg of air pressure, completing the manufacturing process.

[0095] The tin sculpture produced by the present invention using the above-described mold and manufacturing method has an aluminum frame 7 with a "coating" structure (tin layer wrapping the aluminum frame 7), retaining the excellent properties of tin (moisture-proof, antibacterial), and the weight is reduced by more than 60% compared to pure tin sculpture (aluminum specific gravity 2.7g / cm³). 3Tin 7.3 g / cm³ 3 This reduces costs by more than 50%.

[0096] Deformation prevention and efficient processing: The aluminum frame with 7 supports enhances the strength of tin engraving (hardness 60-150HB vs pure tin 5-6HBS), and the integrated mold design shortens the production cycle to 1 / 3 of the traditional process.

[0097] In this invention, the performance parameters of aluminum and tin are as follows:

[0098] Properties and parameters of aluminum: specific gravity 2.7 g / cm³ 3 Melting point 660℃, hardness 60-150HB, tensile strength ≤137MPa, elongation ≤5%, processing performance: can be gas welded and contact welded, not easy to braze, suitable for pressure processing.

[0099] Properties and parameters of tin: specific gravity 7.3 g / cm³ 3 Tin has a melting point of 231.79℃, a hardness of 5-6 HBS, and a tensile strength of 17-21 MPa. Its elongation ranges from 15% to 60%. Regarding processing properties, tin is easily pressure-processed, and due to its low recrystallization temperature, it does not exhibit significant work hardening even after intense cold working.

[0100] Since aluminum cannot be brazed, the above-mentioned method of wrapping it with clothing was adopted.

[0101] After the aforementioned tin products are manufactured according to this invention, machining and finishing are required. Due to the casting process, there will inevitably be some eccentricity. Generally, workpieces are clamped and machined using the inner and outer surfaces as references. When machining the outer diameter, the three-jaw chuck is used to firmly hold the workpiece. When machining the inner hole, the three-jaw chuck is used to clamp the workpiece tightly. Therefore, the internal skeleton will be eccentric, resulting in uneven thickness or exposed skeleton during machining, making the eccentricity of the skeleton completely invisible. It is essential to clamp the workpiece onto the aluminum skeleton to correct the eccentricity, machining away the eccentricity of the inner and outer diameters to make it concentric with the aluminum skeleton 7.

[0102] To solve this problem, repeated experiments were conducted, and success was finally achieved. The concentricity was within 0.05mm, and the solder sheet thickness was within 0.3mm, whereas previously the solder surface thickness was over 1mm. This preserved the properties of solder, enhanced the strength of the workpiece, and, most importantly, reduced costs. The following calibration methods can be used:

[0103] Clamping head installation: Install one clamping head with electric heating function in front of and behind each jaw of the three-jaw chuck. The outer layer of the clamping head is made of copper with fast heat conduction, and a stainless steel rod is embedded in the center for clamping the aluminum frame 7.

[0104] Heating the clamping head: The clamping head is energized and heated to a temperature above the melting point of tin;

[0105] Workpiece clamping and positioning: Align the tin-coated aluminum frame 7 workpiece with the heated clamping head. When the clamping head contacts the outer tin layer of the workpiece, the tin layer melts. The 6 clamping heads clamp the inner aluminum frame 7. After clamping, the power is turned off and the temperature is reduced to ensure that the aluminum frame 7 is firmly fixed.

[0106] Turning: Using aluminum frame 7 as the reference, turn the inner and outer circles to correct the eccentricity, control the concentricity within 0.05mm, and the tin sheet thickness within 0.3mm;

[0107] Heating before unloading the workpiece: Before unloading the workpiece, reheat the clamping head to above the melting point of tin. After cooling down by turning off the power, release the clamping head and remove the workpiece.

[0108] Repairing pits: The six clamping pits left on the surface of the workpiece after turning are repaired and smoothed out with solder.

[0109] The above correction method can be specifically as follows:

[0110] A three-jaw chuck is equipped with electrically heated clamping heads made of copper heat-conducting blocks for efficient heat dissipation; the internal core uses stainless steel bars for clamping. Stainless steel possesses high temperature resistance, wear resistance, and high hardness, ensuring the workpiece is securely clamped. Each jaw has one clamping head on each side, for a total of six. The operation is as follows: the clamping heads are heated to a temperature of at least 232°C and then clamped against the workpiece with its aluminum frame. When the heated clamping heads contact the tin layer on the workpiece surface, the tin layer melts instantly (tin's melting point is 231.79°C), at which point the six clamping heads firmly hold the internal aluminum frame for turning operations. The power is then cut off to allow the clamping heads to cool. When the workpiece needs to be removed, the power is restored to the clamping heads at 232°C, followed by power cut-off and cooling. The entire electrical control process is automated. Given the excellent soldering properties of tin, the six pits formed on the workpiece surface can be repaired using soldering.

[0111] The above description is merely a preferred embodiment of the present invention. However, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention should be covered within the scope of protection of the present invention.

Claims

1. A mold for reducing the weight of tin engraving, characterized in that, include: Bottom fixing plate; The outer steel mold is set on the bottom fixed plate. It is a double-opening steel mold with a cooling system and a heating system arranged on it. The product pattern mold, made of high-temperature resistant silicone, is set inside the outer steel mold; A central pressure cap is provided on the outer steel mold and has a liquid inlet. The core, located at the center of the mold, extends through the central pressure cap into the cavity formed by the outer steel mold, and is used to squeeze the molten solder. The aluminum frame, serving as the skeleton for the tin sculpture, is placed inside the cavity, and its bottom has several through holes for the molten tin to enter and exit. A material support device is installed on the bottom fixing plate and located at the bottom of the product pattern mold. It is used to support the product pattern mold and lift the product pattern mold and casting when the mold is opened.

2. The mold for reducing the weight of tin engraving according to claim 1, characterized in that, The outer steel mold is installed on both sides of the vertical casting press and is opened and closed by a hydraulic cylinder.

3. A mold for reducing the weight of tin engraving according to claim 1, characterized in that, The upper half of the product pattern mold is vertically cut on all four sides, while the lower half is not cut, and a reinforcing rib is provided in the middle.

4. A mold for reducing the weight of tin engraving according to claim 1, characterized in that, The core has a hollow structure with a hole in the middle that does not extend through the bottom of the core, for introducing a cooling or heating medium.

5. A mold for reducing the weight of tin engraving according to claim 1, characterized in that, Also includes: The upper mold fixing plate is concentrically connected to the core.

6. A mold for reducing the weight of tin engraving according to claim 1, characterized in that, The material support device includes: The material support rod is mounted on the bottom fixing plate; A support block is disposed at the top of the material support rod and located at the bottom of the product pattern mold; The material support rod drives the support block to lift the product pattern mold and the casting.

7. A mold for reducing the weight of tin engraving according to any one of claims 1-6, characterized in that, The central pressure cap and the aluminum frame are connected by an interference fit with a fixing pin.

8. A method for reducing the weight of tin sculptures, characterized in that, Includes the following steps: Step (1) Aluminum frame prefabrication To fabricate an aluminum frame, small holes are machined on the open end face, and through holes are made at the bottom. Step (2): Prepare a mold for reducing the weight of tin engraving as described in any one of claims 1-7. Start the heating system on the outer steel mold to preheat it, fix the product pattern mold on the support block, and put it into the outer steel mold; Step (3), Aluminum frame installation and molten tin pouring Heat the aluminum frame to the preset temperature and put it on the center cap. Pour molten tin into the mold through the inlet. Put down the center cap and aluminum frame into the cavity. The molten tin enters the interior through the through hole at the bottom of the aluminum frame and is level with the molten tin outside. Step (4), Mold closing, extrusion and molding Close the outer steel mold tightly, press the core downwards to squeeze the molten solder until the aluminum frame is completely wrapped, switch the heating system to the cooling system, and wait for the molten solder to solidify; Step (5) Opening the mold and removing the parts Switch the cooling system to a heating system to prevent the tin layer from sticking to the mold. Remove the core and center cap in sequence, open the outer steel mold, and the material support device lifts the product pattern mold and casting. Use air pressure to blow the product out of the product pattern mold to complete the production.

9. A tin-carved product, characterized in that, It is manufactured using the manufacturing method described in claim 8.

10. The method for correcting tin-engraved products according to claim 9, characterized in that, Includes the following steps: Clamping head installation: Install one chucking head with electric heating function in front of and behind each jaw of the three-jaw chuck. The outer layer of the chucking head is made of copper with fast heat conduction, and a stainless steel rod is embedded in the center for clamping the aluminum frame. Heating the clamping head: The clamping head is energized and heated to a temperature above the melting point of tin; Workpiece clamping and positioning: Align the tin-coated aluminum frame workpiece with the heated clamping head. When the clamping head contacts the outer tin layer of the workpiece, the tin layer melts. The 6 clamping heads clamp the inner aluminum frame. After clamping, the power is turned off and the temperature is reduced to ensure that the aluminum frame is firmly fixed. Turning: Using the aluminum frame as a reference, turn the aluminum frame to correct the eccentricity of the inner and outer circles, control the concentricity within 0.05mm, and the tin foil thickness within 0.3mm; Heating before unloading the workpiece: Before unloading the workpiece, reheat the clamping head to above the melting point of tin. After cooling down by turning off the power, release the clamping head and remove the workpiece. Repairing pits: The six clamping pits left on the surface of the workpiece after turning are repaired and smoothed out with solder.

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