A coater

Abstract

A coating machine of the present invention includes: a frame; a lower reaction chamber mounted on the frame, the lower reaction chamber having a first guide rod assembly on its inner cavity, a membrane carrier plate mounted on the first guide rod assembly, a lower mold mounted below the membrane carrier plate, the lower mold including a product fixture, a first lifting drive module mounted at the bottom of the lower mold, and a second lifting drive module mounted at the bottom of the membrane carrier plate; and an upper reaction chamber, which is configured to open and close with the lower reaction chamber, the upper reaction chamber having a vacuum hole on one side of its inner cavity, second guide rod assemblies mounted on both sides of its inner cavity, a membrane pressing frame slidably connected between the two second guide rod assemblies, inward-flipping heating assemblies mounted on both sides of its inner cavity, a support rod mounted at the top of its inner cavity, and a flexible upper mold mounted at the bottom of the support rod. This coating machine can reduce surface cracks and protrusions on products, and improve product yield.

Description

Technical Field

[0001] This invention relates to the technical field of coating machines, and more particularly to a coating machine. Background Technology

[0002] In the surface decoration processing of plastic, rubber, and metal parts such as mobile phone cases, motorcycles, and automotive trim, a common practice is to heat a film with adhesive on the back and a pattern printed on the front, softening the film and the adhesive on the back, and then bonding the film to the product surface, so that the film is firmly attached to the product surface, forming a decorative layer with a three-dimensional pattern effect. The equipment used to achieve this process is usually called a coating machine.

[0003] Such coating machines generally include an upper reaction chamber and a lower reaction chamber that can be opened and closed relative to each other: the lower reaction chamber is used to place the product and the membrane (initially, the product and the membrane are separate), and the upper reaction chamber is equipped with a heating device to heat the membrane; during operation, the product and the membrane are first placed in their respective positions, then the upper and lower reaction chambers are driven to close, then a vacuum is drawn into the closed space after the chambers are closed, and at the same time the membrane is heated and softened by the heating device, so that the membrane is finally attached to the surface of the product. After the adhesive on the membrane has cured and cooled, the chamber is opened and the product is taken out, thus completing the entire coating process.

[0004] However, the above-mentioned coating machine has the following two technical defects:

[0005] 1. During the actual process of vacuuming the sealed space after the aforementioned bonding chamber and simultaneously heating and softening the diaphragm using a heating device to finally bond the diaphragm to the product surface, the following phenomenon was observed: During the heat bonding and curing process of the adhesive layer between the product and the diaphragm, when the diaphragm is heated to a certain temperature threshold, due to uneven stress or low pressure on the diaphragm surface in a vacuum environment, the adhesive layer itself is prone to chemical reaction and gradually solidifies and bulges, forming irregularly distributed protrusions or granular shapes on the product surface (although the protrusions or granular shapes are very small, they are visible to the naked eye). This results in unevenness on the product surface, leading to a low yield rate of coated products (especially noticeable on flat products).

[0006] 2. In some existing coating equipment, the heating device is located outside the sealed space formed after the upper and lower reaction chambers are closed. The operating principle of this heating device is as follows: after the upper and lower reaction chambers are closed, the heating device extends into the sealed space via a sliding rail, lead screw, and other transmission mechanisms to heat the diaphragm. Once the preset temperature is reached, the heating device must be withdrawn from the sealed space before subsequent processes such as vacuuming and diaphragm bonding to the product surface can proceed. Since the processes of withdrawing the heating device from the sealed space, vacuuming, and bonding the diaphragm to the product surface all take time, the diaphragm continuously dissipates heat and cools down during this period. This results in unstable surface temperature (significant temperature fluctuations) or the actual temperature at which it is bonded to the product surface is significantly lower than the required softening temperature (temperature drop, causing the diaphragm or adhesive to harden during bonding). Forcing the diaphragm to bond to the product surface in a hardened state easily leads to irregular cracks and defects on the product surface (especially noticeable at locations with height differences in the product). Summary of the Invention

[0007] The purpose of this invention is to overcome the aforementioned defects in the prior art and provide a coating machine that allows the film to be continuously and evenly pressurized during the bonding and curing process, before the adhesive at the bottom of the film undergoes a chemical reaction due to heat, causing it to bulge and form protrusions or particles. This prevents the adhesive from bulging and forming protrusions. Simultaneously, it also ensures a more stable temperature for the film during heating, preventing temperature drops and avoiding cracks during film bonding. This reduces the occurrence of surface defects such as protrusions and cracks during the coating process, thereby improving the surface coating quality and increasing product yield.

[0008] To achieve the above objectives, the present invention provides a coating machine, comprising:

[0009] frame;

[0010] The lower reaction chamber is mounted on the frame. A first guide rod assembly is provided on the inner cavity of the lower reaction chamber. A membrane carrier plate is mounted on the first guide rod assembly. A lower mold is mounted below the membrane carrier plate. The lower mold includes a product fixture. A first lifting drive module is mounted at the bottom of the lower mold. A second lifting drive module is mounted at the bottom of the membrane carrier plate.

[0011] The upper reaction chamber is configured to open and close with the lower reaction chamber. A vacuum hole is provided on one side of the inner cavity of the upper reaction chamber. Second guide rod assemblies are installed on both sides of the inner cavity of the upper reaction chamber. A diaphragm pressure frame is slidably connected between the two second guide rod assemblies. An inward-flipping heating assembly is installed on both sides of the inner cavity of the upper reaction chamber. A support rod is installed at the top of the inner cavity of the upper reaction chamber. A flexible upper mold is installed at the bottom of the support rod.

[0012] Preferably, the first guide rod assembly includes a first guide sleeve mounted on the lower reaction chamber, a first guide rod passing through the inner cavity of the lower reaction chamber and slidably connected to the first guide sleeve, and a first rod top sleeve mounted on the top of the first guide rod. The diaphragm carrier is mounted on the first rod top sleeve, and the lower mold is sleeved on the first guide rod.

[0013] Preferably, the second lifting drive module includes a connecting frame mounted at the bottom of the first guide rod and a second lifting drive cylinder mounted on the frame. One end of the second lifting drive cylinder is mounted on the connecting frame, and the second lifting drive cylinder is used to drive the connecting frame to reciprocate lifting and lowering, thereby driving the first guide rod to reciprocate lifting and lowering, and finally driving the diaphragm carrier plate to reciprocate lifting and lowering.

[0014] Preferably, the first lifting drive module is used to drive the lower mold to reciprocate up and down along the direction of the first guide rod assembly. The first lifting drive module passes through the bottom of the inner cavity of the lower reaction chamber and is a hydraulic cylinder.

[0015] Preferably, the lower mold further includes a lower template and a fixture heating assembly. The first lifting drive mold assembly is mounted on the bottom of the lower template. The lower template is sleeved on the first guide rod assembly. The fixture heating assembly is mounted on the lower template. The product fixture is mounted on the fixture heating assembly. The fixture heating assembly includes a heating plate and several heating rods inserted into the heating plate. The product fixture is used to place the product.

[0016] Preferably, the diaphragm carrier is equipped with positioning posts for positioning the diaphragm and vacuum suction cups for adsorbing the diaphragm.

[0017] Preferably, the second guide rod assembly includes support arms installed on both sides of the inner wall of the upper reaction chamber, a second guide rod installed between the top wall of the inner wall of the upper reaction chamber and the support arms, and a second guide sleeve slidably connected to the second guide rod, the second guide sleeve being installed on the diaphragm pressure frame.

[0018] Preferably, each of the internal tilting heating components includes a tilting drive assembly installed on the inner cavity of the upper reaction chamber, a tilting plate installed on the tilting drive assembly, and a plurality of heating tubes installed on the tilting plate and arranged linearly.

[0019] Preferably, the tilting drive assembly includes a sealing bushing mounted on one side of the outer wall of the upper reaction chamber, a mounting bracket mounted on one end of the sealing bushing, front and rear drive cylinders mounted on the mounting bracket, a rack shaft mounted on one end of the front and rear drive cylinders and slidably connected to the sealing bushing and inserted into one side of the inner cavity of the upper reaction chamber, a drive gear mounted on one side of the inner cavity of the upper reaction chamber and meshing with the rack shaft, a bearing mounted on the other side of the inner cavity of the upper reaction chamber, and a rotating shaft inserted between the drive gear and the bearing, wherein the tilting plate is mounted on the rotating shaft.

[0020] Preferably, the flexible upper mold is a silicone material component.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. This invention, by incorporating an internally rotating heating component within the upper reaction chamber, allows the heating component to directly heat the membrane within the sealed space after chamber closure. This ensures the membrane remains in a stable, sealed environment throughout the entire process, from heating and approaching the flexible upper mold to final bonding. This reduces the likelihood of temperature fluctuations or hardening due to heat dissipation or prolonged subsequent processes, thereby lowering the probability of surface cracks caused by membrane hardening during bonding. Simultaneously, this invention uses a first lifting drive module to raise the lower mold, ensuring that the product, membrane, and flexible upper mold mutually resist each other. The pressure is applied and maintained before the adhesive at the bottom of the diaphragm undergoes a chemical reaction due to heat and begins to bulge. In other words, the diaphragm is already under uniform and stable pressure before the adhesive temperature reaches the threshold at which it is prone to bulging and forming protrusions. The diaphragm is then heated further until it reaches a suitable coating temperature. Since the pressure has been established and maintained beforehand, when the adhesive tends to bulge or protrude when the temperature rises to the threshold, the existing pressure will promptly flatten and suppress it, thereby reducing the probability of protruding defects on the product surface.

[0023] 2. In summary, the present invention, through the inward-flipping heating component, makes the temperature of the film more uniform, more stable, less volatile, and slower to drop during the coating process, thereby reducing the occurrence of surface cracks and defects. The flexible upper mold allows the film to be pressed in time during the coating process, reducing the occurrence of raised defects on the product surface. Overall, the surface flatness and appearance consistency of the coated product are improved, and the product yield is greatly increased. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a coating machine provided in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of a coating machine provided by an embodiment of the present invention, omitting the frame;

[0027] Figure 3 This is a front sectional view of a coating machine provided in an embodiment of the present invention, omitting the frame;

[0028] Figure 4 This is a schematic diagram of the structure of the first guide rod assembly, diaphragm carrier plate, lower mold, first lifting drive module and second lifting drive module provided in the embodiments of the present invention;

[0029] Figure 5 This is a schematic diagram of a coating machine provided by an embodiment of the present invention, with the frame omitted in a slanted side section.

[0030] Figure 6 This is a side sectional view of a coating machine provided in an embodiment of the present invention, with the frame omitted.

[0031] The diagram includes:

[0032] 1. Frame; 2. Lower reaction chamber; 21. First guide rod assembly; 211. First guide sleeve; 212. First guide rod; 213. First rod top sleeve; 22. Membrane carrier plate; 221. Positioning post; 23. Lower mold; 231. Product fixture; 232. Lower template; 233. Fixture heating assembly; 2331. Heating plate; 2332. Heating rod; 24. First lifting drive module; 25. Second lifting drive module; 251. Connecting frame; 252. Second lifting drive cylinder; 3. Upper reaction chamber; 31. Vacuum hole; 32. Second guide rod assembly; 321. Guide rod assembly; 322. Support arm; 323. Second guide rod; 324. Second guide sleeve; 33. Diaphragm pressure frame; 34. Inner tilting heating assembly; 341. Tilting drive assembly; 3411. Sealing bushing; 3412. Mounting bracket; 3413. Front and rear drive cylinders; 3414. Rack shaft; 3415. Drive gear component; 3416. Bearing component; 3417. Rotating shaft; 342. Tilting plate; 343. Heating tube; 35. Support rod component; 36. Flexible upper mold; 37. Third guide rod assembly; 38. Third lifting drive module. Detailed Implementation

[0033] The technical solution of this embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiment is one embodiment of the present invention, and not all embodiments thereof. Based on this embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example:

[0035] Please see Figures 1 to 6 An embodiment of the present invention provides a coating machine, which includes:

[0036] Rack 1;

[0037] The lower reaction chamber 2 is mounted on the frame 1. The lower reaction chamber 2 has a first guide rod assembly 21 in its inner cavity. The first guide rod assembly 21 has a membrane carrier plate 22 mounted on it. The lower mold 23 is mounted below the membrane carrier plate 22. The lower mold 23 includes a product fixture 231. The bottom of the lower mold 23 has a first lifting drive module 24 mounted on it. The bottom of the membrane carrier plate 22 has a second lifting drive module 25 mounted on it.

[0038] The upper reaction chamber 3 is connected to the lower reaction chamber 2 in an openable configuration. A vacuum hole 31 is provided on one side of the inner cavity of the upper reaction chamber 3. Second guide rod assemblies 32 are installed on both sides of the inner cavity of the upper reaction chamber 3. A diaphragm pressure frame 33 is slidably connected between the two second guide rod assemblies 32. An inwardly rotating heating assembly 34 is installed on both sides of the inner cavity of the upper reaction chamber 3. A support rod 35 is installed at the top of the inner cavity of the upper reaction chamber 3. A flexible upper mold 36 is installed at the bottom of the support rod 35.

[0039] The first guide rod assembly 21 includes a first guide sleeve 211 mounted on the lower reaction chamber 2, a first guide rod 212 passing through the inner cavity of the lower reaction chamber 2 and slidably connected to the first guide sleeve 211, and a first rod top sleeve 213 mounted on the top of the first guide rod 212. The diaphragm carrier plate 22 is mounted on the first rod top sleeve 213, and the lower mold 23 is sleeved on the first guide rod 212.

[0040] The second lifting drive module 25 includes a connecting frame 251 mounted at the bottom of the first guide rod 212 and a second lifting drive cylinder 252 mounted on the frame 1. One end of the second lifting drive cylinder 252 is mounted on the connecting frame 251. The second lifting drive cylinder 252 is used to drive the connecting frame 251 to reciprocate lifting and lowering, thereby driving the first guide rod 212 to reciprocate lifting and lowering, and finally driving the diaphragm carrier plate 22 to reciprocate lifting and lowering.

[0041] It is worth noting that the lower template 232 of the lower mold 23 is only fitted onto the first guide rod 212 of the first guide rod assembly 21, that is, the first guide rod 212 passes through the lower template 232, but the lower template 232 does not rise or fall with the first guide rod 212.

[0042] The first lifting drive module 24 is used to drive the lower mold 23 to reciprocate up and down along the direction of the first guide rod assembly 21. The first lifting drive module 24 passes through the bottom of the inner cavity of the lower reaction chamber 2 and is a hydraulic cylinder.

[0043] The lower mold 23 also includes a lower template 232 and a fixture heating assembly 233. The first lifting drive module 24 is installed at the bottom of the lower template 232. The lower template 232 is sleeved on the first guide rod assembly 21. The fixture heating assembly 233 is installed on the lower template 232. The product fixture 231 is installed on the fixture heating assembly 233. The fixture heating assembly 233 includes a heating plate 2331 and several heating rods 2332 inserted into the heating plate 2331. The product fixture 231 is used to place the product.

[0044] In addition, a junction box is installed on one side of the lower template 232. The junction box facilitates the wiring of internal parts such as the heating rod 2332 and the vacuum suction cup located between the upper reaction chamber 3 and the lower reaction chamber 2. The junction box passes through the bottom of the inner cavity of the lower reaction chamber 2 and rises and falls together with the lower template 232.

[0045] The product fixture 231 has a placement slot for placing products.

[0046] The membrane carrier plate 22 is equipped with positioning posts 221 for positioning the membrane and vacuum suction cups for adsorbing the membrane. The membrane carrier plate 22 has a coating groove for inserting the product for coating. The positioning posts 221 are installed around the coating groove, and the vacuum suction cups (vacuum suction cups are prior art and are not shown in the attached drawings) are located around the periphery of the coating groove.

[0047] The second guide rod assembly 32 includes a support arm 321 installed on both sides of the inner cavity of the upper reaction chamber 3, a second guide rod 322 installed between the top wall of the inner cavity of the upper reaction chamber 3 and the support arm 321, and a second guide sleeve 323 slidably connected to the second guide rod 322. The second guide sleeve 323 is installed on the diaphragm pressure frame 33.

[0048] The diaphragm pressing frame 33 has a pressing groove for the flexible upper mold 36 to be inserted and for the flexible upper mold 36 to abut against the diaphragm-product. The pressing groove has a positioning groove for the positioning post 221 to be inserted around it. A sealing O-ring is provided around the pressing groove (the positioning groove is located outside the sealing O-ring). The diaphragm pressing frame 33 is used to press the periphery of the diaphragm.

[0049] Each internal tilting heating assembly 34 includes a tilting drive assembly 341 installed on the inner cavity of the upper reaction chamber 3, a tilting plate 342 installed on the tilting drive assembly 341, and a number of heating tubes 343 installed on the tilting plate 342 and arranged linearly.

[0050] The tilting drive assembly 341 includes a sealing bushing 3411 mounted on one side of the outer wall of the upper reaction chamber 3, a mounting bracket 3412 mounted on one end of the sealing bushing 3411, a front and rear drive cylinder 3413 mounted on the mounting bracket 3412, a rack shaft 3414 mounted on one end of the front and rear drive cylinders 3413 and slidably connected to the sealing bushing 3411 and inserted into one side of the inner cavity of the upper reaction chamber 3, a drive gear 3415 mounted on one side of the inner cavity of the upper reaction chamber 3 and meshing with the rack shaft 3414, a bearing 3416 mounted on the other side of the inner cavity of the upper reaction chamber 3, and a rotating shaft 3417 inserted between the drive gear 3415 and the bearing 3416. The tilting plate 342 is mounted on the rotating shaft 3417. The rack shaft 3414 is a shaft-like component with a shaft at one end and a rack at the other end.

[0051] The flexible upper mold 36 is made of silicone material. In addition, the flexible upper mold 36 can also be made of polymer material with certain elasticity and high temperature resistance. These silicone material components and polymer material components can meet the requirements of undergoing certain elastic deformation when pressed and bonded with products and films, and can withstand the heating temperature during the coating process.

[0052] The lower reaction chamber 2 is equipped with a third guide rod assembly 37 and a third lifting drive module 38 on its outer side. The third lifting drive module 38 is a cylinder, and the third guide rod assembly 37 is existing technology. The upper reaction chamber 3 is slidably connected to the third guide rod assembly 37. The third lifting drive module 38 is used to drive the upper reaction chamber 3 to rise and fall along the direction of the third guide rod assembly 37, so as to realize the opening and closing of the upper reaction chamber 3 and the lower reaction chamber 2.

[0053] The first lifting drive module 24 can also be a slide table, a cylinder, an electric cylinder, or a combination of a cylinder, a slide rail slider (or a bushing + guide rod), a combination of a rotary motor, a synchronous pulley and synchronous belt, and a slide rail slider, a combination of a rotary motor, a synchronous pulley and synchronous belt, and a ball screw, a combination of a rotary motor, a screw, and a slide rail slider, a combination of a rotary motor, a gear, a rack shaft 3414, and a slide rail slider (or a bushing + guide rod), or other drive components that drive in a linear manner. However, the first lifting drive module 24 is a hydraulic cylinder, which is the optimal implementation method because the hydraulic cylinder provides the most support force.

[0054] The second lifting drive module 25 and the third lifting drive module 38 can also be a slide table, an electric cylinder, a hydraulic cylinder, or a combination of a cylinder, a slide rail slider (or a bushing + guide rod), a combination of a rotary motor, a synchronous pulley and synchronous belt, and a slide rail slider, a combination of a rotary motor, a synchronous pulley and synchronous belt, and a ball screw, a combination of a rotary motor, a screw, and a slide rail slider, a combination of a rotary motor, a gear, a rack shaft 3414, and a slide rail slider (or a bushing + guide rod), or other drive components that drive in a linear manner.

[0055] The overall operating principle of the coating machine of the present invention can be summarized as follows:

[0056] S0: In the initial state, the product is placed on the product fixture 231, the membrane is placed on the membrane carrier plate 22, and the membrane is adsorbed by the vacuum suction cup; the product fixture 231 is located below the membrane carrier plate 22, and the upper reaction chamber 3 is located above the lower reaction chamber 2.

[0057] S1: The third lifting drive module 38 drives the upper reaction chamber 3 to descend, so that the upper reaction chamber 3 and the lower reaction chamber 2 are combined.

[0058] S11: During the closing process in step S1, the following actions have already been completed at this point:

[0059] The diaphragm frame 33 is held up by the diaphragm carrier plate 22 and rises to a certain distance. The diaphragm frame 33's own weight makes the sealing O-ring of the diaphragm frame 33 effectively press against the periphery of the diaphragm. At this time, the vacuum suction cup stops adsorbing the diaphragm.

[0060] S2: The flip heating component is turned on and heated. After the flip heating component is turned on, the heating tube 343 is aligned with the diaphragm for heating. The fixture heating component 233 is also in a heated state. (This invention does not limit or explain the specific opening and heating of the fixture heating component 233. It can be adjusted according to the actual coating work. And this lack of limitation and explanation does not affect the explanation of the principle of this technical solution.)

[0061] S3: When the heating tube 343 of the flip heating assembly in step S2 heats to a certain set value (the set value is lower than the temperature value when the adhesive at the bottom of the film is about to solidify into a protrusion or granules), the flip heating assembly turns off the heating and is stored away. The second lifting drive module 25 drives the film carrier plate 22 to rise, so that the film is close to the flexible upper mold 36 (at this time, it has not yet made contact).

[0062] S4: The first lifting drive module 24 drives the lower mold 23 to rise until the product, diaphragm, and flexible upper mold 36 come into contact and pressurize to ensure a certain hydraulic pressure for contact (pressure holding).

[0063] S5: During the above steps S1-S4, the vacuum hole 31 can be opened to vacuum the combined space of the upper reaction chamber 3 and the lower reaction chamber 2. The present invention does not limit or explain the specific opening time of the vacuum hole 31, which can be adjusted according to the actual coating work. Moreover, this lack of limitation and explanation does not affect the explanation of the principle of this technical solution.

[0064] S6: The fixture heating component 233 continues to heat the diaphragm to the specified temperature value, and then continues to keep it warm and pressurized for a period of time. After the adhesive at the bottom of the diaphragm dries, the diaphragm is coated onto the product.

[0065] S7: Open the warehouse and take out the covered products.

[0066] The overall operating principle of a coating machine according to an embodiment of the present invention is as follows:

[0067] S0 (Initial Preparation):

[0068] In the initial state, the upper surface of the product fixture 231 is level with or slightly lower than the diaphragm carrier plate 22, facilitating the placement of the product into the placement slot of the product fixture 231. After the product is placed in the placement slot of the product fixture 231, the first lifting drive module 24 lowers the lower mold 23 to its lowest position, so that the product fixture 231 is located below the diaphragm carrier plate 22, and the product fixture 231 does not contact the diaphragm carrier plate 22. Subsequently, the diaphragm is laid on the diaphragm carrier plate 22, positioned by the positioning posts 221 on the diaphragm carrier plate 22, and fixed by negative pressure adsorption using the vacuum suction cups on the diaphragm carrier plate 22.

[0069] S1 (Joint Position):

[0070] The third lifting drive module 38 drives the upper reaction chamber 3 to descend along the direction of the third guide rod assembly 37 until the upper reaction chamber 3 and the lower reaction chamber 2 are joined together, forming a sealed space between the upper reaction chamber 3 and the lower reaction chamber.

[0071] S11 (The diaphragm clamping action is completed simultaneously during the closing process):

[0072] During the descent and closure of the upper reaction chamber 3, the membrane pressure frame 33, which is slidably connected between the two second guide rod assemblies 32, descends synchronously with the upper reaction chamber 3. When the membrane pressure frame 33 is pressed against the membrane on the membrane carrier plate 22, the membrane pressure frame 33 experiences a relative displacement relative to the upper reaction chamber 3 along the direction of the second guide rod 322. Furthermore, the membrane pressure frame 33, relying on its own weight, ensures that the sealing O-rings around its pressure groove stably press against the periphery of the membrane. Simultaneously, the positioning groove on the membrane pressure frame 33 engages with the positioning post 221 of the membrane carrier plate 22 to prevent misalignment. At this point, the vacuum suction cup of the membrane carrier plate 22 stops adsorbing the membrane, leaving the membrane firmly fixed only by the membrane pressure frame 33.

[0073] In step S11, the advantage of adding the membrane carrier plate 22 is that:

[0074] If the diaphragm carrier plate 22 is not added,

[0075] In step S0, the vacuum chuck of the membrane carrier 22 will continuously adhere to and fix the membrane.

[0076] In step S5, the vacuum port 31 evacuates the combined space of the upper reaction chamber 3 and the lower reaction chamber 2.

[0077] If the diaphragm is in different vacuum states at the top and bottom, it is easy to cause the diaphragm to be unreliable in its fixed position. Therefore, in step S11, the diaphragm is pressed down by the diaphragm pressing frame 33, and the vacuum suction cup is turned off to adsorb the diaphragm. This ensures that only one vacuum state of the vacuum hole 31 affects the diaphragm. At the same time, the diaphragm pressing frame 33 presses down on the diaphragm to ensure that the diaphragm is fixed in place.

[0078] S2 (Inner flip-type heating element 34 begins preheating):

[0079] After the chamber is closed, the flipping drive assembly 341 of the inner flipping heating assembly 34 on both sides of the inner cavity of the upper reaction chamber 3 (the front and rear drive cylinders 3413 drive the rack shaft 3414 to move, the rack shaft 3414 meshes with the drive gear 3415 to drive the bearing 3416 to rotate synchronously via the rotating shaft 3417, and the rotating shaft 3417 drives the flipping plate 342 to rotate) drives the flipping plate 342 to flip from the vertical storage state to the horizontal heating state, so that the several heating tubes 343 arranged linearly on the flipping plate 342 are turned on to heat the diaphragm on the diaphragm pressing frame 33 pressing groove, preheating and softening the diaphragm; at the same time, the fixture heating assembly 233 on the lower template 232 (heating plate 2331 and several heating rods 2332 inserted on the heating plate 2331) is also in the heating state (the specific opening time of the heating rods 2332 can be adjusted according to the actual coating process), preheating the product fixture 231 and the product on it.

[0080] S3 (Heating component storage, diaphragm close to flexible upper mold 36):

[0081] When the heating tube 343 heats the membrane to the set temperature (this set temperature is lower than the temperature at which the adhesive at the bottom of the membrane begins to solidify and bulge or form particles; this set temperature is determined by the actual adhesive formula and actual testing, and will not be elaborated here), the flip drive assembly 341 drives the heating tube 343 to turn off the heating and flip in the opposite direction, returning it to the vertical state and freeing up the vertical space inside the upper reaction chamber 3; then the second lifting drive cylinder 252 of the second lifting drive module 25 drives the connecting frame 251 to rise, causing the first guide rod 212 to slide upward along the direction of the first guide sleeve 211, thereby causing the membrane carrier plate 22 mounted on the top sleeve 213 of the first rod to rise as a whole, so that the flexible upper mold 36 enters the pressing groove of the membrane pressing frame 33, and the preheated and softened membrane on the membrane carrier plate 22 moves upward toward the flexible upper mold 36 (at this time, it has not yet made contact).

[0082] In step S3, the advantage of using the inward-flipping heating component 34 is that, since the heating tube 343 is inside the combined space after the chamber is closed and directly heats the membrane, compared with the existing technology of setting the heating device outside the combined space and requiring the heating device to be inserted into the combined space for heating and then withdrawn from the combined space, it can avoid the problems of membrane temperature dropping significantly, large temperature fluctuations, unstable temperature, uneven temperature, hardening of some parts of the membrane, and cracks caused by the membrane being pulled on the product surface during bonding due to the time spent on the subsequent chamber closing and vacuuming processes after the heating device withdraws from the combined space.

[0083] S4 (Lower mold 23 rises to initiate and maintain pressure):

[0084] The first lifting drive module 24 (hydraulic cylinder) drives the lower mold 23 (the lower template 232, fixture heating assembly 233, and product fixture 231 are integrated) to rise along the direction of the first guide rod assembly 21. The product on the product fixture 231 first abuts against the diaphragm on the diaphragm carrier plate 22; as the lower mold 23 continues to rise, the fixture heating assembly 233 rises accordingly and abuts against the bottom of the first rod top sleeve 213 at the top of the first guide rod 212. Subsequently, as the first lifting drive module 24 continues to drive the lower mold 23 to rise, its lifting force is transmitted to the first rod top sleeve 213 through the fixture heating assembly 233, thereby driving the first guide rod 212 and the diaphragm carrier plate 22 to rise synchronously until the product, diaphragm, and flexible upper mold 36 abut against each other, and the first lifting drive module 24 continuously applies upward hydraulic pressure to raise and maintain pressure.

[0085] S5 (vacuum):

[0086] During steps S1 to S4, the vacuum hole 31 on one side of the upper reaction chamber 3 is used to evacuate the space of the chamber (the specific opening time of the vacuum can be adjusted according to the actual coating process) to remove the air between the product and the membrane layer, so as to avoid the formation of air bubbles in the layer that would affect the bonding quality and appearance of the product and the membrane.

[0087] S6 (Insulation and pressure curing, simultaneous suppression of bumps):

[0088] The fixture heating component 233 continuously heats the diaphragm to a suitable coating temperature (this coating temperature is determined by the actual diaphragm material, adhesive, product material, and actual testing, and will not be elaborated here). It then maintains the temperature and pressure for a period of time, allowing the adhesive at the bottom of the diaphragm to gradually dry and solidify under the continuous pressure applied by the flexible upper mold 36. During the curing process, the adhesive at the bottom of the diaphragm is constantly subjected to the extrusion force generated between the flexible upper mold 36 and the lower mold 23. This causes any protrusions or particles that may have formed due to the chemical reaction caused by heating at the bottom of the diaphragm to be flattened and suppressed by the continuous extrusion force, thereby preventing the formation of bump defects on the surface of the diaphragm of the product, thus completing the coating and bonding of the diaphragm to the surface of the product.

[0089] S7 (Open the warehouse and retrieve the product):

[0090] S71: The vacuum port 31 of the upper reaction chamber 3 stops vacuuming, and the external gas valve of the vacuum port 31 switches to connect the chamber space with the outside atmosphere, restoring normal pressure.

[0091] S72: Release the holding pressure of the first lifting drive module 24 (the oil inside the hydraulic cylinder overflows through the relief valve), and keep the hydraulic oil in the lower chamber of the hydraulic cylinder open through the reversing valve of the balance valve, so that the first lifting drive module 24 basically maintains the current height and is in an active state that can be passively driven to lift.

[0092] S73: The second lifting drive cylinder 252 of the second lifting drive module 25 drives the connecting frame 251 and the first guide rod 212 to descend, causing the diaphragm carrier plate 22 to descend; the first rod top sleeve 213 then presses against the upper surface of the fixture heating assembly 233, so that the first lifting drive module 24-lower template 232-fixture heating assembly 233-product fixture 231-product and diaphragm carrier plate 22 descend synchronously until the first lifting drive module 24 returns to the initial lowest position. The function of step S73 is to ensure that the product covered with the diaphragm is always attached to the diaphragm before it is removed, preventing accidental separation; and within the first 5-10mm stroke of the second lifting drive module 25 descending, the diaphragm is still pressed by the O-ring of the diaphragm pressing frame 33. This synchronous descent helps the diaphragm to separate smoothly from the flexible upper mold 36; if separation is still difficult, a top air pipe can be set at the top of the upper reaction chamber 3 to blow air between the flexible upper mold 36 and the upper surface of the diaphragm to assist separation.

[0093] S74: The third lifting drive module 38 drives the upper reaction chamber 3 to rise to the top, the upper reaction chamber 3 and the lower reaction chamber 2 open, and the product that has been coated is taken out manually or by a robotic arm. This coating machine work cycle ends.

[0094] An embodiment of the present invention provides a coating machine that heats the diaphragm in a timely manner within a sealed space after the chamber is closed, and applies uniform and continuous pressure to the product and the diaphragm in advance with the flexible upper mold 36, which can effectively reduce the generation of surface cracks and protrusions of the product and improve the product yield.

[0095] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coating machine, characterized in that, It includes: Rack (1); The lower reaction chamber (2) is mounted on the frame (1). The lower reaction chamber (2) has a first guide rod assembly (21) on its inner cavity. A membrane carrier plate (22) is mounted on the first guide rod assembly (21). A lower mold (23) is mounted below the membrane carrier plate (22). The lower mold (23) includes a product fixture (231). A first lifting drive module (24) is mounted at the bottom of the lower mold (23). A second lifting drive module (25) is mounted at the bottom of the membrane carrier plate (22). The upper reaction chamber (3) is connected to the lower reaction chamber (2) in an openable configuration. A vacuum hole (31) is provided on one side of the inner cavity of the upper reaction chamber (3). Second guide rod assemblies (32) are installed on both sides of the inner cavity of the upper reaction chamber (3). A diaphragm pressure frame (33) is slidably connected between the two second guide rod assemblies (32). An inward-flipping heating assembly (34) is installed on both sides of the inner cavity of the upper reaction chamber (3). A support rod (35) is installed at the top of the inner cavity of the upper reaction chamber (3). A flexible upper mold (36) is installed at the bottom of the support rod (35).

2. A coating machine according to claim 1, characterized in that, The first guide rod assembly (21) includes a first guide sleeve (211) mounted on the lower reaction chamber (2), a first guide rod (212) passing through the inner cavity of the lower reaction chamber (2) and slidably connected to the first guide sleeve (211), and a first rod top sleeve (213) mounted on the top of the first guide rod (212). The membrane carrier plate (22) is mounted on the first rod top sleeve (213), and the lower mold (23) is sleeved on the first guide rod (212).

3. A coating machine according to claim 2, characterized in that, The second lifting drive module (25) includes a connecting frame (251) mounted at the bottom of the first guide rod (212) and a second lifting drive cylinder (252) mounted on the frame (1). One end of the second lifting drive cylinder (252) is mounted on the connecting frame (251). The second lifting drive cylinder (252) is used to drive the connecting frame (251) to reciprocate and lift, thereby driving the first guide rod (212) to reciprocate and lift, and finally driving the diaphragm carrier plate (22) to reciprocate and lift.

4. A coating machine according to claim 1, characterized in that, The first lifting drive module (24) is used to drive the lower mold (23) to reciprocate up and down along the direction of the first guide rod assembly (21). The first lifting drive module (24) passes through the bottom of the inner cavity of the lower reaction chamber (2). The first lifting drive module (24) is a hydraulic cylinder.

5. A coating machine according to claim 1, characterized in that, The lower mold (23) also includes a lower template (232) and a fixture heating assembly (233). The first lifting drive module (24) is installed at the bottom of the lower template (232). The lower template (232) is sleeved on the first guide rod assembly (21). The fixture heating assembly (233) is installed on the lower template (232). The product fixture (231) is installed on the fixture heating assembly (233). The fixture heating assembly (233) includes a heating plate (2331) and several heating rods (2332) inserted into the heating plate (2331). The product fixture (231) is used to place the product.

6. A coating machine according to claim 1, characterized in that, The diaphragm carrier plate (22) is equipped with a positioning post (221) for positioning the diaphragm and a vacuum suction cup for adsorbing the diaphragm.

7. A coating machine according to claim 1, characterized in that, The second guide rod assembly (32) includes a support arm (321) installed on both sides of the inner cavity of the upper reaction chamber (3), a second guide rod (322) installed between the top wall of the inner cavity of the upper reaction chamber (3) and the support arm (321), and a second guide sleeve (323) slidably connected to the second guide rod (322). The second guide sleeve (323) is installed on the membrane pressure frame (33).

8. A coating machine according to claim 1, characterized in that, Each of the internal tilting heating components (34) includes a tilting drive assembly (341) installed on the inner cavity of the upper reaction chamber (3), a tilting plate (342) installed on the tilting drive assembly (341), and a plurality of heating tubes (343) installed on the tilting plate (342) and arranged in a linear manner.

9. A coating machine according to claim 8, characterized in that, The flip drive assembly (341) includes a sealing bushing (3411) mounted on one side of the outer wall of the upper reaction chamber (3), a mounting bracket (3412) mounted on one end of the sealing bushing (3411), a front and rear drive cylinder (3413) mounted on the mounting bracket (3412), a rack shaft (3414) mounted on one end of the front and rear drive cylinder (3413) and slidably connected to the sealing bushing (3411) and inserted into one side of the inner cavity of the upper reaction chamber (3), a drive gear (3415) mounted on one side of the inner cavity of the upper reaction chamber (3) and meshing with the rack shaft (3414), a bearing (3416) mounted on the other side of the inner cavity of the upper reaction chamber (3), and a rotating shaft (3417) inserted between the drive gear (3415) and the bearing (3416). The flip plate (342) is mounted on the rotating shaft (3417).

10. A coating machine according to claim 1, characterized in that, The flexible upper mold (36) is a silicone material component.

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