Golden mold plastic sealing heating device

Abstract

This invention proposes a heating device for gold mold sealing. Within the sealing cavity, hot air, homogenized by a vortex, envelops and heats the heat-shrink film, causing it to shrink uniformly and adhere tightly to the gold mold surface. This eliminates common problems associated with traditional single-point heating, such as localized overheating, film wrinkling, or detachment. The vortex generated by the spiral air guide vanes, combined with the mixing chamber structure, thoroughly mixes the hot air before it enters the sealing cavity, avoiding localized hot spots and temperature differences caused by hot air guns or single nozzles, resulting in smoother film shrinkage. Uniform heating reduces wrinkles, bubbles, and poor adhesion, enhancing the tight bond between the sealing layer and the mold surface, thereby protecting the internal structure of the mold and extending its service life. Concentrating all heating and air supply processes within a sealed cavity and assembly avoids instability caused by manually moving the heat source, and the process parameters are easily standardized and replicated in batches.

Description

Technical Field

[0001] This application relates to the field of gold mold encapsulation heating, and more particularly to a gold mold encapsulation heating device. Background Technology

[0002] The purpose of sealing gold molds is to provide a stable and reliable protective layer during daily use, storage, and transportation.

[0003] Although gold is a precious metal with excellent corrosion resistance, it may be subject to collisions during transportation or storage, which can cause wear and tear on the internal structure of the mold or damage due to impact.

[0004] During the plastic sealing process of gold molds, first check the mold surface for scratches, dents, and residual impurities. Then clean and dry the mold. Next, wrap the gold mold with heat shrink film and heat the heat shrink film with a heating device. During the heating process, the heat shrink film wraps the gold mold, and the plastic sealing is completed.

[0005] Currently used heating devices are generally hot air guns. During the heating process, the airflow generated by the hot air gun concentrates on heating specific areas of the heat shrink film, causing localized overheating and uneven temperature distribution. This leads to problems such as poor adhesion and localized wrinkling. Once wrinkles or adhesion defects form in these overheated areas, subsequent trimming and rework are not only time-consuming but may also cause secondary damage to the film layer due to repeated heating, or affect the overall adhesion strength of the film layer, reducing the stability of the final product and the mold life.

[0006] Secondly, because the position and angle of the hot air gun must be constantly adjusted, the operator often needs to hold the heat for 1-2 minutes to complete the molding of a mold, which is time-consuming and tiring, limiting the efficiency of molding and increasing the probability of operational errors. Utility Model Content

[0007] In view of this, it is necessary to provide a gold mold sealing heating device to solve the above problems.

[0008] Embodiments of this application provide a gold mold sealing heating device, comprising: The heating housing has an internal cavity and a mixing cavity communicating with the cavity; A heating element is disposed within the cavity; A blower is disposed inside the cavity to blow hot air from the cavity into the mixing chamber to make the heat uniform. Spiral air guide vanes are disposed within the mixing chamber to guide hot air to form a vortex within the mixing chamber; A hot air assembly is connected to the mixing chamber, and the hot air assembly forms a sealed cavity, which is connected to the mixing chamber.

[0009] In at least one embodiment of this application, the heating element includes: A substrate with a protrusion forming a protrusion in the middle of one side and connecting portions located on both sides of the protrusion; A first heating plate is disposed on the protrusion; The second heating plate is disposed on the connecting part.

[0010] In at least one embodiment of this application, a plurality of first heating plates and a plurality of second heating plates are inclinedly arranged around the protrusion, and the first heating plates and the second heating plates on both sides of the protrusion are symmetrically arranged.

[0011] In at least one embodiment of this application, a first communicating groove is provided on the protrusion, and the first communicating groove is provided between two adjacent first heating plates; A second connecting groove is provided on the connecting part, and a second connecting groove is provided between two adjacent second heating plates.

[0012] In at least one embodiment of this application, the mixing chamber includes: The mounting cavity has one end connected to the cavity, and multiple spiral air guide vanes are arranged at equal angles on the inner wall of the mounting cavity. A conical cavity, one end of which is connected to the mounting cavity; An enlarged cavity, one end of which is connected to the conical cavity; The diameter of the mounting cavity is denoted as a, the minimum diameter of the conical cavity is denoted as b, the maximum diameter of the conical cavity is denoted as c, and the diameter of the enlarged cavity is denoted as d, satisfying the relationship: a = b < c < d.

[0013] In at least one embodiment of this application, the hot air assembly includes: A fixed heating plate is provided with a first ventilation pipe, one end of which is connected to the mixing chamber. The fixed heating plate is provided with a first air outlet that is connected to the first ventilation pipe. Two sets of movable heating components are respectively located at both ends of the fixed heating plate and are rotatably connected to the fixed heating plate. The fixed heating plate and the two sets of movable heating components form the encapsulated cavity.

[0014] In at least one embodiment of this application, the active heating component includes: The side heating plate has a second ventilation pipe, one end of which is connected to the mixing chamber. The side heating plate has a second air outlet that is connected to the second ventilation pipe, and one end of the side heating plate is rotatably connected to the fixed heating plate. The top heating plate has a third ventilation pipe, one end of which is connected to the mixing chamber. The top heating plate has a third air outlet that is connected to the third ventilation pipe. The top heating plate is rotatably connected to the side heating plate at the end away from the fixed heating plate.

[0015] In at least one embodiment of this application, there are two first ventilation pipes located on the same straight line, and there are multiple first air outlets, with the first air outlets perpendicular to the axis of the first ventilation pipes.

[0016] In at least one embodiment of this application, the first air outlet is a conical hole, one end of the first air outlet has a connecting port and the other end has an air outlet, the diameter of the connecting port is denoted as e, and the diameter of the air outlet is denoted as f, satisfying the relationship: e < f.

[0017] In at least one embodiment of this application, the heating housing has an air inlet slot communicating with the cavity.

[0018] The gold mold sealing heating device of this embodiment will have at least the following beneficial effects: The gold mold sealing heating device provided above uses hot air homogenized by vortex flow to wrap and heat the heat shrink film inside the sealing cavity, causing it to shrink uniformly and adhere tightly to the surface of the gold mold, thus eliminating the local overheating, film wrinkling or detachment phenomena commonly seen in traditional single-point heating.

[0019] The vortex generated by the spiral air guide vanes, combined with the mixing chamber structure, can fully stir and mix the hot air before it enters the sealing chamber, avoiding local hot spots and temperature differences caused by hot air guns or single air nozzles, resulting in smoother film shrinkage.

[0020] Uniform heating reduces wrinkles, bubbles, and poor adhesion, enhances the tight bond between the molding compound and the mold surface, thereby protecting the internal structure of the mold and extending its service life.

[0021] All heating and air supply processes are concentrated in a sealed cavity and components, avoiding instability caused by manually moving the heat source, and the process parameters are easy to standardize and replicate in batches. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] in: Figure 1This is a structural diagram of a heating device for sealing gold molds. Figure 2 Another structural view of the gold mold sealing heating device; Figure 3 An exploded view of the heating device for sealing gold molds; Figure 4 This is a structural diagram of the heating element; Figure 5 A cross-sectional view of the heating device for molding gold molds; Figure 6 This is another cross-sectional view of the gold mold sealing heating device.

[0024] Explanation of main component symbols 100. Gold mold sealing heating device; 110. Heating housing; 110a. Cavity; 110b. Mounting cavity; 110c. Conical cavity; 110d. Enlarged cavity; 110e. Air inlet slot; 120. Heating element; 121. Substrate; 1211. Protrusion; 1212. Connecting part; 122. First heating plate; 123. Second heating plate; 1211a. First connecting groove; 1211b. Second connecting groove; 130. Hair dryer; 140. Spiral air guide vane; 150. Hot air assembly; 150a. Sealed cavity; 151. Fixed heating plate; 1511. First ventilation duct; 151a. First air outlet; 151b. Connecting port; 151c. Air outlet; 152. Movable heating assembly; 1521. Side heating plate; 15211. Second ventilation duct; 1521a. Second air outlet; 1522. Top heating plate; 15221. Third ventilation duct; 1522a. Third air outlet. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] Embodiments of this application provide a gold mold sealing heating device 100, comprising: The heating housing 110 has an internal cavity 110a and a mixing cavity communicating with the cavity 110a; A heating element 120 is disposed within the cavity 110a; A blower 130 is disposed in the cavity 110a to blow hot air from the cavity 110a into the mixing chamber to make the heat uniform. A spiral guide vane 140 is disposed inside the mixing chamber to guide hot air to form a vortex inside the mixing chamber; The hot air assembly 150 is connected to the mixing chamber, and the hot air assembly 150 forms a sealing cavity 150a, which is connected to the mixing chamber.

[0028] Please refer to Figures 1-6 In this embodiment, upon startup, the gold mold sealing heating device 100 is energized, causing the heating element 120 to heat up in the cavity 110a within the heating housing 110. The heating housing 110 serves to seal and insulate, ensuring that heat energy is concentrated in the cavity 110a area.

[0029] The blower 130 (fan or air pump) draws in the air in the cavity 110a and heats it through the heating element 120. Then, the high-temperature air is stably blown into the mixing chamber connected to the cavity 110a to provide a heat source for the next homogenization process.

[0030] The mixing chamber is equipped with spiral guide vanes 140. Upon entry, hot air rotates at high speed along the spiral path of the guide vanes 140, forming an annular vortex. This vortex causes the air to tumble and converge multiple times within the chamber, rapidly eliminating temperature differences and achieving uniform heat distribution.

[0031] The uniformly mixed hot air is drawn out by the hot air assembly 150 and enters the sealing cavity 150a surrounding the mold. The hot air assembly 150 typically consists of a fixed heating plate 151 and two sets of movable heating components 152, which form a closed space to deliver hot air from all directions between the film and the mold.

[0032] Inside the sealing cavity 150a, the heat-shrink film is wrapped and heated by hot air homogenized by vortex, causing it to shrink uniformly and adhere tightly to the surface of the gold mold, eliminating the local overheating, film wrinkling or detachment phenomena commonly seen in traditional single-point heating.

[0033] The vortex generated by the spiral air guide 140, combined with the mixing chamber structure, can fully stir and mix the hot air before it enters the sealing chamber 150a, avoiding local hot spots and temperature differences caused by hot air guns or single air nozzles, and making the film shrinkage smoother.

[0034] Uniform heating reduces wrinkles, bubbles, and poor adhesion, enhances the tight bond between the molding compound and the mold surface, thereby protecting the internal structure of the mold and extending its service life.

[0035] All heating and air supply processes are concentrated in a sealed cavity and components, avoiding instability caused by manually moving the heat source, and the process parameters are easy to standardize and replicate in batches.

[0036] In at least one embodiment of this application, the heating element 120 includes: The substrate 121 has a protrusion 1211 protruding from the middle of one side and a connecting portion 1212 located on both sides of the protrusion 1211; A first heating plate 122 is disposed on the protrusion 1211; The second heating plate 123 is disposed on the connecting part 1212.

[0037] Please refer to Figures 1-6 In this embodiment, after the power / heat medium is turned on, the substrate 121 located in the cavity 110a of the heating housing 110 begins to heat up. The substrate 121 has an outwardly protruding protrusion 1211 (the central region is thickened) formed in the middle of one side, and connecting portions 1212 (relatively thin or flat) are provided on both sides of the protrusion 1211.

[0038] The first heating plate 122 is installed on the top surface or curved surface of the protrusion 1211, close to the center of the cavity 110a. After being powered on, the first heating plate 122 quickly concentrates the heat output to the central area of ​​the cavity 110a.

[0039] The second heating plates 123 are respectively arranged on the connecting part 1212, and are symmetrically distributed on both sides opposite to the first heating plate 122. After the second heating plate 123 is energized, it provides a stable supplementary heat source to the regions on both sides of the cavity 110a.

[0040] When the blower 130 draws in air and passes along the surface of the substrate 121, it is first heated to a higher temperature by the first heating plate 122, and then continues to contact the second heating plates 123 on both sides. The airflow in the cavity 110a undergoes preheating and homogenization processes in the center and on both sides, respectively.

[0041] Due to the geometric differences in height and thickness between the protrusion 1211 and the connecting part 1212, as well as the partitioned layout of the heating plate, the heating path of the airflow on the substrate 121 is deliberately lengthened and dispersed, thereby making the hot air entering the mixing chamber more gentle in terms of temperature gradient.

[0042] After being heated in stages by the first and second heating plates 123, the air has a smaller temperature difference and a more uniform heat distribution. It is then guided by the blower 130 into the mixing chamber connected to the cavity 110a, where the spiral guide vane 140 further disperses the vortex, achieving fine homogenization of the overall temperature.

[0043] The first heating plate 122 on the protrusion 1211 can quickly heat the central area to the target temperature, while the second heating plates 123 on both sides provide the necessary temperature compensation to avoid overheating in the center or undercooling at the edges.

[0044] As the airflow passes through multiple heating plates, the temperature transitions smoothly from the center to both sides, resulting in the hot air flowing into the mixing chamber already possessing good temperature uniformity, thus reducing the dependence on the intensity of the subsequent mixing chamber vortex.

[0045] The first heating plate 122, after being thickened by the protrusion 1211, has a larger mass and higher heat capacity, which can quickly absorb and release heat; the second heating plates 123 on both sides, due to their dispersed area, can flexibly adjust their power, achieving an organic combination of rapid heating and precise temperature control.

[0046] Zoned heating ensures that each zone is heated only when needed, avoiding the entire board operating at full power for extended periods. Meanwhile, the first and second heating plates 123 can be made of different specifications or materials, achieving power grading and optimization, reducing overall energy consumption, and slowing down component fatigue and aging.

[0047] In at least one embodiment of this application, a plurality of first heating plates 122 and a plurality of second heating plates 123 are inclinedly arranged around the protrusion 1211, and the first heating plates 122 and the second heating plates 123 on both sides of the protrusion 1211 are symmetrically arranged.

[0048] Please refer to Figures 1-6 In this embodiment, multiple sets of first heating plates 122 and second heating plates 123 are arranged around the protrusion 1211 of the substrate 121. These heating plates are radially or fan-shaped and inclined outward with the protrusion 1211 as the center, gradually inclined downward from the center high point to both sides, and the first heating plate 122 and the second heating plate 123 are symmetrically arranged about the center line on the left and right sides of the protrusion 1211.

[0049] After the blower 130 draws air into the cavity 110a, it first impacts the central group of first heating plates 122. Because these plates are at a certain angle to the airflow direction, the airflow is guided upward or downward and forms a shear layer on the inclined surface, increasing the contact time with the heating surface.

[0050] The airflow, which has been initially heated by the central first heating plate 122, continues to flow along the inclined direction to the group of second heating plates 123 on both sides, where the second heating plates 123 provide secondary heating to the airflow.

[0051] The inclined heating plates are arranged in a stepped manner, so that the airflow is gradually heated in multiple different temperature gradient ranges, and finally a relatively uniform temperature distribution is achieved.

[0052] The heated airflow is blown into the mixing chamber, where it works with the vortex generated by the spiral guide vane 140 to achieve final temperature homogenization. Then, it is distributed to all directions of the sealing chamber 150a by the hot air assembly 150.

[0053] The inclined setting creates strong turbulence and shear layer on the heating plate, which significantly improves the heat transfer coefficient between the air and the heating plate and shortens the preheating time.

[0054] Through the staged heating of the first heating plate 122 and the second heating plate 123, the airflow temperature does not rise suddenly at once, but is gradually heated in multiple stages from the center to the side, so that the temperature gradient is greatly reduced when it enters the mixing chamber.

[0055] The centrally symmetrical plate array structure ensures that the heat sources on the left and right sides are completely symmetrical, eliminating the uneven heating phenomenon caused by the gas path arrangement of the device, so that each direction of the plastic sealing cavity 150a can obtain the same amount of heat.

[0056] The tilt angle and plate spacing can be adjusted according to the mold depth and curved surface shape, flexibly adapting to golden molds of various sizes and contours, ensuring that the film can be heated evenly on complex surfaces.

[0057] Zoned tilt heating reduces reliance on a single high-power plate, enabling selective and precise heating of hot spots, resulting in lower overall energy consumption; multiple low-power heating plates share the load, reducing high-intensity cycling on a single plate and extending the lifespan of the heating element by 120°C.

[0058] The uniform and controllable multi-stage heating process, combined with subsequent eddy current homogenization, ensures that the film shrinks smoothly and without wrinkles; at the same time, the improved heating efficiency shortens the molding cycle of each mold, meeting the needs of high-efficiency mass production.

[0059] In at least one embodiment of this application, a first communicating groove 1211a is provided on the protrusion 1211, and the first communicating groove 1211a is provided between two adjacent first heating plates 122; A second connecting groove 1211b is provided on the connecting part 1212, and a second connecting groove 1211b is provided between two adjacent second heating plates 123.

[0060] Please refer to Figures 1-6 In this embodiment, when the blower 130 pushes the heated air in the cavity 110a toward the area of ​​the protrusion 1211 and the connecting portion 1212, the air first flows between the first heating plate 122 and the second heating plate 123. At this time, the first connecting groove 1211a located at the top of the protrusion 1211 and the second connecting groove 1211b located on the connecting portion 1212 respectively provide direct air passages between adjacent heating plates.

[0061] After the air is heated by the first heating plate 122 at the top of the protrusion 1211, part of the airflow flows along the plate surface to both sides; the other part is switched to the next heating unit through the first connecting groove 1211a between two adjacent first heating plates 122, forming a cross flow.

[0062] In the region of the connecting part 1212, the airflow that has been diverted by the first connecting groove 1211a is reunited or dispersed through the second connecting groove 1211b between the second heating plates 123 for secondary mixing and heating compensation.

[0063] Guided by the two-stage connecting channels, the airflow maintains a large-area contact with the heating plate while avoiding stagnation or dead zones in a single area (such as the center of the protrusion 1211 or the edge of the connecting part 1212). The hot air meanders and converges multiple times in each channel, making the temperature and flow rate of the air entering the mixing chamber tend to be stable and consistent.

[0064] The first connecting slot 1211a and the second connecting slot 1211b work together to ensure that hot air in the central area and the side area can be exchanged, which significantly reduces the temperature difference between the plates and between the plates and between the slots, thereby improving the consistency of the overall thermal field.

[0065] The alternating channel structure accelerates the airflow in the slits and then diffuses outside the channels, forming turbulence. This increases the heat exchange contact area and time between the hot air and the heating plate, significantly improving heating efficiency and shortening the preheating time before sealing.

[0066] Uniform and stable hot air entering the subsequent mixing chamber and sealing chamber 150a enables the heat shrink film to shrink and adhere evenly on the mold surface, further reducing wrinkles and bubbles, and ensuring highly repeatable sealing quality and stable process for each batch of products.

[0067] In at least one embodiment of this application, the mixing chamber includes: The mounting cavity 110b is connected to the cavity 110a at one end, and a plurality of spiral air guide vanes 140 are arranged at equal angles on the inner wall of the mounting cavity 110b. A conical cavity 110c, one end of which is connected to the mounting cavity 110b; The enlarged cavity 110d is connected at one end to the conical cavity 110c; The diameter of the mounting cavity 110b is denoted as a, the minimum diameter of the conical cavity 110c is denoted as b, the maximum diameter of the conical cavity 110c is denoted as c, and the diameter of the enlarged cavity 110d is denoted as d, satisfying the relationship: a = b < c < d.

[0068] Please refer to Figures 1-6In this embodiment, the preheated hot air blown in by the cavity 110a first enters the mounting cavity 110b (diameter a) with the same diameter. Multiple spiral guide vanes 140 arranged at equal angles on the inner wall of the mounting cavity 110b cause the airflow to be tangentially guided as soon as it enters, rotating along the curved surface of the spiral guide vanes 140, quickly forming a primary vortex, and completing the first round of turbulent mixing.

[0069] The primary vortex airflow flows from the mounting cavity 110b into the connected conical cavity 110c. The minimum inlet diameter b of the conical cavity 110c is equal to the diameter a of the mounting cavity 110b (a=b), and then gradually expands axially to the maximum diameter c (c>b). This involute structure causes a channel contraction-expansion effect, which on the one hand accelerates the airflow at the inlet (increases dynamic pressure), and on the other hand creates a local decompression zone at the outlet, causing the vortex to repeatedly accelerate and decompress, greatly enhancing the shearing and turbulence of the air, and further dispersing any residual temperature unevenness.

[0070] From the outlet of the conical cavity 110c, the airflow enters the larger expansion cavity 110d (diameter d, and d>c). In this space, the vortex is amplified and gradually stabilizes, the airflow velocity decreases, and the pressure recovers. This wide area buffers and smoothly releases the strongly mixed gas, ensuring that the hot air output to the sealing cavity 150a has reached a highly uniform and stable state in terms of temperature and flow rate.

[0071] The hot air, after being deeply mixed by the three-section cavity and the spiral guide vane 140, is finally evenly distributed from the mixing cavity to the hot air assembly 150 and enters the sealing cavity 150a to heat and shrink the heat shrink film evenly.

[0072] The tangential introduction of the mounting cavity 110b, the acceleration-decompression of the conical cavity 110c, and the buffering and stabilization of the expansion cavity 110d form a three-stage mixing process of primary-enhancing-shaping, which eliminates the problem that a single vortex or simple expansion cavity cannot completely homogenize the air, making the air temperature distribution more uniform.

[0073] The spiral guide vane 140 inside the installation cavity 110b initiates the rotating airflow. The geometric expansion and contraction of the cone and expansion cavity 110d stages can avoid dead zones caused by excessive concentration or stagnation of vortices, ensuring that hot air passes through all areas of the mixing cavity in full volume and at all times.

[0074] The acceleration-decompression effect of the conical cavity 110c greatly enhances turbulence, while the smooth transition of the enlarged cavity 110d promotes the slow release of heat energy. The combination of the two improves the heat exchange efficiency between the hot air and the heating element 120 and the thin film, enabling the ideal temperature to be reached in a shorter time.

[0075] The airflow that is finally delivered into the sealing chamber at 150a has a moderate flow rate and uniform temperature, eliminating the fluctuations caused by traditional single-stage mixing or direct ventilation nozzles. The film shrinkage process is smooth and wrinkle-free, and the sealing quality is highly repeatable.

[0076] In at least one embodiment of this application, the hot air assembly 150 includes: A fixed heating plate 151 is provided with a first ventilation pipe 1511, one end of which is connected to the mixing chamber. The fixed heating plate 151 is provided with a first air outlet 151a that is connected to the first ventilation pipe 1511. Two sets of movable heating components 152 are respectively disposed at both ends of the fixed heating plate 151 and rotatably connected to the fixed heating plate 151. The fixed heating plate 151 and the two sets of movable heating components 152 form the plastic sealing cavity 150a.

[0077] Please refer to Figures 1-6 In this embodiment, the high-temperature hot air homogenized by multi-stage eddy currents in the mixing chamber is introduced into the fixed heating plate 151 of the hot air assembly 150 through the first ventilation pipe 1511 connected to the mixing chamber. The first air outlet 151a uniformly opened on the fixed heating plate 151 initially distributes the hot air and sprays it to a predetermined angle to form a basic heat flow field.

[0078] Two sets of movable heating components 152 are respectively hinged to both ends of the fixed heating plate 151. During operation, the movable components can rotate inward around the hinges and close relative to the fixed heating plate 151, with the three together forming a sealed plastic sealing cavity 150a. At this time, the mold along with the wrapped heat-shrink film is placed in the center of the plastic sealing cavity 150a.

[0079] After the sealing cavity 150a is closed, the first air outlet 151a of the fixed heating plate 151 and the corresponding air outlets on the movable components (side heating plate 1521 and top heating plate 1522) open simultaneously, and hot air is evenly sprayed onto the film from multiple directions—the sides and the top. The three-sided coordinated air supply path ensures that the heat source surrounds the mold surface in three dimensions, and the heat shrink film is heated in all directions.

[0080] Under the multi-channel, directional blowing of the hot air assembly 150, the heat-shrink film shrinks uniformly upon heating, tightly conforming to the fine contours of the gold mold. Fixed and movable heating plates work together to maintain a high-temperature environment within the molding cavity 150a until the film layer is completely set.

[0081] After heating is complete, the air supply can be temporarily stopped and low-temperature clean gas can be blown in for indoor cooling and shaping. Then, the movable heating component 152 can be unscrewed, the sealing cavity 150a can be opened, and the mold that has been sealed can be taken out.

[0082] The fixed heating plate 151 and the two sets of movable heating components 152 form a plastic-sealed cavity 150a, creating a convection-sealed space that significantly reduces heat loss and improves heating efficiency.

[0083] The first air outlet 151a supplements the side and top heating of the air outlet on the movable heating component 152, so that the hot air works in concert from multiple directions, eliminating local cold spots or overheated areas caused by heating from a single direction.

[0084] The enclosed plastic-sealed cavity 150a reduces heat radiation and airflow leakage to the outside world, thus reducing energy consumption. At the same time, the multi-channel, low-velocity uniform air supply is safer than high-velocity impact heating, avoiding film rupture or accidental burns to operators.

[0085] In at least one embodiment of this application, the active heating component 152 includes: The side heating plate 1521 has a second ventilation pipe 15211, one end of which is connected to the mixing chamber. The side heating plate 1521 has a second air outlet 1521a that is connected to the second ventilation pipe 15211. The side heating plate 1521 is rotatably connected to one end of the fixed heating plate 151. The top heating plate 1522 has a third ventilation pipe 15221, one end of which is connected to the mixing chamber. The top heating plate 1522 has a third air outlet 1522a that is connected to the third ventilation pipe 15221. The top heating plate 1522 is rotatably connected to the end of the side heating plate 1521 away from the fixed heating plate 151.

[0086] Please refer to Figures 1-6 In this embodiment, the operator rotates the side heating plate 1521 inward from one end of the fixed heating plate 151, and then rotates the top heating plate 1522 along the hinge connected to the side heating plate 1521. The three together form a plastic-sealed cavity 150a that is approximately "pocket" shaped.

[0087] The gold mold (already fitted with heat-shrink film) is placed in the center of this cavity, and the contact surfaces of the side heating plate 1521 and the top heating plate 1522 form a fully enclosed space along the side wall and top surface of the mold.

[0088] The homogenized hot air distributed from the mixing chamber enters the second ventilation pipe 15211 of the side heating plate 1521 and is evenly sprayed from both sides of the cavity to the side of the mold through the second air outlet 1521a on the side plate. The other part of the hot air enters the top heating plate 1522 along the third ventilation pipe 15221 and is vertically sprayed from the top of the cavity to the top surface of the mold through the third air outlet 1522a.

[0089] The second air outlet 1521a of the side heating plate 1521 provides circumferential heating to the side wall of the mold, while the third air outlet 1522a of the top heating plate 1522 provides vertical impact to the top surface of the mold.

[0090] Two sets of airflows converge and tumble within the molding cavity 150a, allowing hot air to act simultaneously on all directions of the mold surface, ensuring that the film can rapidly heat up and shrink from the side to the bottom and from the top to the edge.

[0091] According to the set process curve, hot air is continuously sprayed until the heat shrink film completely fits the mold outline.

[0092] After heating is complete, the system can be switched to a low-temperature clean airflow for rapid cooling within the cavity, allowing the film to set and solidify.

[0093] After turning off the air supply, unscrew the top heating plate 1522 and the side heating plate 1521 in reverse order, open the sealing cavity 150a and take out the finished product mold.

[0094] The side heating plate 1521 and the top heating plate 1522 work together to form a dual-channel air supply from the side and top, which is more thorough than heating in one direction and eliminates cold zones and dead corners that are easily generated by traditional hot air guns or single air nozzles.

[0095] The hinged connection makes it easy to open and close, and the opening angle and position of the side plates and top plates can be flexibly adjusted according to the size and shape of the mold, making it suitable for flat, three-dimensional or irregular gold molds.

[0096] The enclosed sealing cavity 150a is a semi-enclosed convection space. The side and top dual-channel air supply reduces heat loss, improves heat utilization, shortens the sealing cycle, and reduces energy consumption.

[0097] In at least one embodiment of this application, there are two first ventilation pipes 1511, which are located on the same straight line, and there are multiple first air outlets 151a, which are perpendicular to the axis of the first ventilation pipes 1511.

[0098] Please refer to Figures 1-6 In this embodiment, the high-temperature air that has been thoroughly homogenized in the mixing chamber by the three-stage vortex and the conical-expanding cavity 110d body structure is simultaneously introduced into two opposing first ventilation pipes 1511 that are located on the same horizontal straight line.

[0099] These two first ventilation pipes 1511 are located on the left and right sides of the plastic-sealed cavity 150a, respectively, and deliver hot air to the fixed heating plate 151 through their respective pipes. Since the pipe length, diameter and pressure are the same, the air flow and pressure entering each pipe are consistent.

[0100] Multiple sets of first air outlets 151a on the fixed heating plate 151, connected to each ventilation pipe, inject hot air laterally from both sides into the sealing cavity 150a in a direction perpendicular to the pipe axis. The airflow from both sides converges in the middle of the cavity, surrounding and penetrating the space between the heat shrink film and the mold.

[0101] Under the alternating action of balanced airflow from both sides, the heat shrink film is heated from both sides at the same time and shrinks synchronously towards the center, eventually adhering tightly to all the details of the mold surface.

[0102] The dual-pipe parallel connection shares the conveying task, and the total channel cross-sectional area is increased, which can meet the higher heat flow requirements and adapt to large-size or multiple pieces in parallel for encapsulation.

[0103] The two ventilation pipes are symmetrically arranged along the same straight line, and are matched with the symmetrical air outlets on the fixed heating plate 151 to ensure that the amount and temperature of hot air on the left and right sides are completely consistent, eliminating one-sided hot or cold spots.

[0104] Even if one side of the parallel dual-pipe system experiences blockage or localized pressure fluctuations, the other side can still maintain a basic gas supply, ensuring production continuity and process stability.

[0105] The jet width and coverage angle can be flexibly controlled by adjusting the tube spacing, air outlet diameter or number, and can be adapted to different mold specifications without replacing the entire tube.

[0106] The planar, symmetrical transverse blowing ensures that the heat-shrink film is heated synchronously and evenly, reducing wrinkles and bulges, and significantly improving product consistency and yield during mass production.

[0107] The low-speed planar jet after multi-hole diversion has lower wind loss and noise than the single-hole high-pressure impact method, reducing fan energy consumption and operating environment noise while maintaining heat transfer efficiency.

[0108] In at least one embodiment of this application, the first air outlet 151a is a conical hole, one end of the first air outlet 151a has a connecting port 151b, and the other end has an air outlet 151c. The diameter of the connecting port 151b is denoted as e, and the diameter of the air outlet 151c is denoted as f, satisfying the relationship: e < f.

[0109] Please refer to Figures 1-6 In this embodiment, the high-temperature air homogenized in the mixing chamber is delivered to the fixed heating plate 151 through the first ventilation pipe 1511. At this time, the hot air is introduced into the connecting port 151b (diameter e) of each conical hole (first air outlet 151a) and begins to enter the injection stage.

[0110] Air enters the gradually expanding conical channel through the small-diameter connecting port 151b. The radial expansion of the space gradually slows down the flow velocity. At the same time, due to the tapered effect of the pipe wall, the internal flow generates a slight axial jet diffusion.

[0111] Finally, air is ejected from the larger diameter air outlet 151c, forming a fan-shaped air curtain with a wide angle and moderate speed, which directly covers the thin film surface inside the plastic sealing cavity 150a.

[0112] Under the diffusion effect of the conical hole, the hot air acts on the heat shrink film with a lower impact force and a wider coverage area, ensuring that the film has a longer residence time while being heated, thereby uniformly absorbing heat and shrinking synchronously towards the mold contour.

[0113] The tapered orifice structure, with its gradually increasing size, allows hot air to diffuse in a fan shape at the outlet, resulting in a wider coverage area. Compared to traditional straight-through orifices, the airflow distribution is more uniform, reducing localized overheating or cold spots and improving the overall temperature consistency of the sealing film.

[0114] The accelerated flow generated by the small inlet diameter is diffused and its velocity is significantly reduced at the large outlet diameter landing point, avoiding the local impact of high pressure on the film, reducing the risk of film rupture or displacement, and ensuring packaging quality.

[0115] The reduced airflow velocity after diffusion increases the residence time of air on the film surface, enhancing heat transfer contact and heat exchange efficiency, helping the film to absorb heat energy more fully and shorten the heating cycle.

[0116] The progressively expanding flow channel within the conical orifice functions similarly to a diffuser, smoothly reducing pressure and speed, and decreasing airflow turbulence and jet noise. At the same time, because it can utilize hot air more efficiently, the fan power requirement and energy consumption are also reduced accordingly.

[0117] In at least one embodiment of this application, the heating housing 110 has an air inlet slot 110e communicating with the cavity 110a.

[0118] Please refer to Figures 1-6 In this embodiment, ambient air is drawn in through the air inlet slot 110e on the bottom of the heating housing 110 and directly enters the cavity 110a connected thereto.

[0119] The fresh air introduced by the air inlet slot 110e first comes into contact with the first and second heating plates 123 distributed on the substrate 121 in the cavity 110a, and the heated component 120 is rapidly heated.

[0120] The heated air is drawn in by the blower 130 and transported to the mixing chamber via the first and second connecting slots 1211b or the ventilation duct; at the same time, new cold air continuously enters the cavity 110a from the air inlet slot 110e to ensure a continuous circulation flow.

[0121] Within the multi-stage flow channel of cavity 110a, mixing chamber, and sealing chamber 150a, hot air is further processed by vortex, cone-expansion chamber 110d, and air outlets at each stage, and finally uniformly sprayed into sealing chamber 150a to complete film shrinkage.

[0122] A continuous stream of cold air enters the cavity 110a, and after contacting the heating plate, it heats up rapidly, forming an efficient heat exchange, shortening the preheating time, and improving the overall heating speed.

[0123] The uniform distribution of the air inlet slots 110e ensures that the air entering the cavity 110a can be replenished in a timely manner in each area. Combined with subsequent mixing and vortexing, the temperature gradient is suppressed from the source, ensuring the uniform heating of the plastic sealant.

[0124] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0125] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A gold mold sealing heating device, characterized in that, include: The heating housing has an internal cavity and a mixing cavity communicating with the cavity; A heating element is disposed within the cavity; A blower is disposed inside the cavity to blow hot air from the cavity into the mixing chamber to make the heat uniform. Spiral air guide vanes are disposed within the mixing chamber to guide hot air to form a vortex within the mixing chamber; A hot air assembly is connected to the mixing chamber, and the hot air assembly forms a sealed cavity, which is connected to the mixing chamber.

2. The gold mold sealing heating device according to claim 1, characterized in that, The heating element includes: A substrate with a protrusion forming a protrusion in the middle of one side and connecting portions located on both sides of the protrusion; A first heating plate is disposed on the protrusion; The second heating plate is disposed on the connecting part.

3. The gold mold sealing heating device according to claim 2, characterized in that, Multiple first heating plates and multiple second heating plates are inclinedly arranged around the protrusion, and the first heating plates and second heating plates on both sides of the protrusion are symmetrically arranged.

4. The gold mold sealing heating device according to claim 2, characterized in that, The protrusion is provided with a first connecting groove, and the first connecting groove is provided between two adjacent first heating plates. A second connecting groove is provided on the connecting part, and a second connecting groove is provided between two adjacent second heating plates.

5. The gold mold sealing heating device according to claim 1, characterized in that, The mixing chamber includes: The mounting cavity has one end connected to the cavity, and multiple spiral air guide vanes are arranged at equal angles on the inner wall of the mounting cavity. A conical cavity, one end of which is connected to the mounting cavity; An enlarged cavity, one end of which is connected to the conical cavity; The diameter of the mounting cavity is denoted as a, the minimum diameter of the conical cavity is denoted as b, the maximum diameter of the conical cavity is denoted as c, and the diameter of the enlarged cavity is denoted as d, satisfying the relationship: a = b < c < d.

6. The gold mold sealing heating device according to claim 1, characterized in that, The hot air assembly includes: A fixed heating plate is provided with a first ventilation pipe, one end of which is connected to the mixing chamber. The fixed heating plate is provided with a first air outlet that is connected to the first ventilation pipe. Two sets of movable heating components are respectively located at both ends of the fixed heating plate and are rotatably connected to the fixed heating plate. The fixed heating plate and the two sets of movable heating components form the encapsulated cavity.

7. The gold mold sealing heating device according to claim 6, characterized in that, The active heating component includes: The side heating plate has a second ventilation pipe, one end of which is connected to the mixing chamber. The side heating plate has a second air outlet that is connected to the second ventilation pipe, and one end of the side heating plate is rotatably connected to the fixed heating plate. The top heating plate has a third ventilation pipe, one end of which is connected to the mixing chamber. The top heating plate has a third air outlet that is connected to the third ventilation pipe. The top heating plate is rotatably connected to the side heating plate at the end away from the fixed heating plate.

8. The gold mold sealing heating device according to claim 6, characterized in that, There are two first ventilation pipes, which are located on the same straight line. There are multiple first air outlets, which are perpendicular to the axis of the first ventilation pipes.

9. The gold mold sealing heating device according to claim 6, characterized in that, The first air outlet is a conical hole. One end of the first air outlet has a connecting opening and the other end has an air outlet. The diameter of the connecting opening is denoted as e, and the diameter of the air outlet is denoted as f, satisfying the relationship: e < f.

10. The gold mold sealing heating device according to claim 1, characterized in that, The heating housing has an air inlet slot that communicates with the cavity.

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