31 results about "Trapped air" patented technology

This air cushion portable information terminal case 100 is characterized by forming an air cushion part A sealed by covering a four peripheral frame part F of the portable information terminal case 100 with an outside four peripheral frame part FO and confining air inside.SOLUTION: An air cushion portable information terminal case (100) comprising a four peripheral frame portion (F), an outer four peripheral frame portion (FO), a transparent bottom plate (G), a portable information terminal case housing portion (S), and an air cushion portion (A), wherein the four peripheral frame portion (F) and the outer four peripheral frame portion (FO) are connected to each other, and the portable information terminal case housing portion (S) is surrounded by the four peripheral frame portion (F) and the transparent bottom plate (G).SELECTED DRAWING: Figure 4

The utility model provides a thickened warm-keeping type automobile seat fabric which comprises a blended base layer fabric, the fabric fluff is arranged on the blended base layer fabric, and the blended base layer fabric is located between a warm-keeping interlayer and a leather fabric layer. The blending base layer fabric, the back lining layer, the warm-keeping interlayer and the leather fabric layer are sewn together through the sewing threads; fluff leaking holes are formed in the warm-keeping interlayer and the leather fabric layer; the long fluff of the blended base layer fabric is matched with the warm-keeping interlayer, air is stored to form a heat insulation layer, heat loss is reduced, and the warm-keeping effect is good; villus leaking holes are formed in the warm-keeping interlayer and the leather fabric layer, so that long villus can penetrate out, air circulation is facilitated, and the air permeability is improved; the layers are tightly combined through a plurality of suture lines, the backing layer is thick, the structural stability and durability are enhanced, and comfortable experience is brought to drivers and passengers.

This utility model discloses an ink printing bubble removal mechanism, relating to the field of ink printing. The mechanism includes a third layer of ink printing stencil with R-shaped grooves at its four corners to collect and expel air. Air guide grooves are equidistantly spaced around the R-shaped grooves. A first ink layer is printed on the inner side of the outer glass, and a second layer is printed on top of the first layer. A height difference exists between the R-shaped grooves and the second ink layer to collect air. This mechanism extends the four right angles of the third ink printing stencil outwards to form R-shaped grooves. The height difference between the R-shaped grooves and the second ink layer provides space for collecting minute amounts of trapped air. When bonding OCA adhesive, trapped air can be expelled to the R-shaped grooves, effectively preventing the formation of air bubbles in the visible area and improving the product's appearance quality.

This utility model relates to the field of rewinding processing devices, and discloses a device suitable for rewinding roll materials, including a first winding device and a second winding device. The first and second winding devices are respectively disposed at both ends of the equipment base, and are used to receive and rewind the roll material respectively. A main feed roller is disposed in the middle position between the first and second winding devices, and is used to pull the roll material forward along the transmission path. A first correction probe and a second correction probe are located before and after the main feed roller, respectively disposed on the unloading side and the winding side, and are used to detect the edge position of the roll material and provide feedback correction signals. This utility model, through the active bonding function of the winding pressure roller, can effectively eliminate trapped air during the rewinding process, improve winding tightness and product yield, and is particularly suitable for processing materials such as tape, aluminum foil, and non-woven fabrics that require high roll density.

A life jacket formed from a shell defining an interior air chamber in the shape of a conventional life jacket. The shell includes a neck opening configured to position a lower section of the shell against a front torso of a user and an upper section of the shell behind a head of the user. A reusable seal is coupled to the upper section of the shell and is operable to selectively open and close access to the interior air chamber. A fastening assembly secures the seal in a fixed closed position. An attachment strap is coupled to the lower section of the shell and is configured to wrap around the torso of the user to secure the shell in place. The life jacket is movable between a deflated condition. When deflated the shell may be folded or rolled into a compact configuration for storage. When inflated, the reusable seal traps air within the interior air chamber and the upper section of the shell is rolled at least two turns and secured by the fastening assembly to prevent unrolling and to compress the trapped air, thereby maintaining buoyancy of the life jacket.

This invention relates to the field of tunnel construction technology and discloses a prefabricated, assembled, reinforced waterproof material and its preparation method. The material includes a pre-installed adhesive tape, a non-woven fabric with a napped surface, a self-adhesive layer, and a layered composite waterproof board. The layered composite waterproof board is composed of upper and lower PE waterproof board layers and a middle EVA waterproof board layer. The separately prepared premixed materials are extruded into a three-layer co-extrusion die and cooled to obtain the layered composite waterproof board. A self-adhesive layer is coated on its surface to form a self-adhesive layer, which is then bonded to the un-nafted surface of the non-woven fabric. Finally, the napped surface of the non-woven fabric is physically pressed and bonded to the pre-installed adhesive tape. This invention improves interlayer bonding and prevents material delamination by employing a multi-layered composite structure and using a compatibilizer. The pre-installed adhesive tape and the napped surface of the non-woven fabric form a mechanical interlocking network, eliminating the need for hot-melt welding. The self-adhesive layer is distributed in strips to create venting channels, effectively removing trapped air and preventing delamination.

A system (50) for separating particles in a fluid has a first (52) and a second chamber (54) connected via a connector (56) with two ends, the first end (58) connecting to the first chamber (52) and the second end (60) connecting to the second chamber (54). The first chamber is higher than the second chamber and is connected pneumatically to an ambient atmosphere (66). The second chamber (54) is connected pneumatically or fluidically only to the first chamber via the connector only. A first method of operating the system includes adding a liquid to the first chamber to trap air in the connector and the second chamber; centrifuging the system at a first relative centrifugal force (RCF1) such that no part of the liquid enters the second chamber, and some air remains trapped in the connector; centrifuging the system at a second relative centrifugal force (RCF2) higher than RCF1, so at least a part of the liquid is transferred from the first chamber to the second chamber through the connector; and centrifuging the system at a relative centrifugal force (RCF3) lower than RCF2 so at least a part of the liquid is transferred from the second chamber to the first chamber through the connector. A second method of operating the system includes first adding a liquid containing particles to the first chamber to trap air in the connector and in the second chamber; then, centrifuging the system at a first relative centrifugal force (RCF1) so part of the air remains trapped in the connector and no particles are transported to the second chamber; then, centrifuging the system at a second relative centrifugal force (RCF2) higher than RCF1, so part of the liquid is transferred from the first chamber to the second chamber through the connector; and finally, centrifuging the system at a relative centrifugal force (RCF3) lower than RCF2 so part of the liquid is transferred from the second chamber to the first chamber through the connector.

A protective cover for vehicles during floods is disclosed A vehicle (102) is driven over the protective cover in any direction The protective cover is laid flat on a ground, pulled up and zipped along the sides. The rolling tube unrolls due to increasing internal pressure allowing the trapped air to escape. The rolling tube automatically rolls back once the pressure stabilizes. An inner tube (105) includes pores to expel air and a hydrophilic hydrogel to expand and seal the inner tube preventing backflow of water and air. An outer tube (110) to prevent water from entering the inner tube. A cork (115) forms a watertight seal, enhanced by a magnetic rim and spring to secure closure when triggered by a helium-filled float that rises with floodwaters. A trigger attached is adapted to rise with water thereby causing the trigger to be pulled out of its notch and releases the cork.

Method for manufacturing an insulating panel (10) with a device (20) comprising a pressing tool (21) with at least one counter-form (22) and at least one pressing part (23), wherein the counter-form (22) has at least one recess (24) for forming the insulating panel, and the method comprises the following steps: a) Arranging at least one first cover layer (12') in the recess (24) of the counter-mold (22) and arranging at least one second cover layer (12") on a pressing area (25) of the pressing part (23) facing the recess (24); b) Covering the first top layer (12') with at least one liquid plastic material, c) Inserting at least one core layer package consisting of an insulating core (27) with fiber layers arranged on both sides into the recess (24) of the counter-mold (22), such that at least the first of the two fiber layers is in contact with the liquid plastic material; d) Covering the second of the two fiber layers with the liquid plastic material, and e) Pressing the pressed part (23) with the pressing area (25) against the counter-form (22), wherein the core layer package is pressed together with the liquid plastic material and the two cover layers (12', 12") to form the insulating panel, and in which process f) at least one venting insert (26), which serves to remove the air trapped between the counter-mold (22) and the pressing part (23) during the pressing process, is arranged on an edge (28) of the counter-mold (22) adjacent to the recess (24), wherein the venting insert (26) is permeable to air and, in a closed state of the pressing tool (21), connects the recess (24) of the counter-mold (22) to the outside atmosphere, and wherein the venting insert (26) is designed to be liquid-tight, so that it allows trapped air to pass through and retains the liquid plastic material during the pressing process.

This invention discloses an injection mold for automotive dashboard trim panels, belonging to the field of injection mold technology. The mold includes a fixed mold and a moving mold. The moving mold integrates a cold slug control device, a vacuum exhaust device, and an independent conformal cooling device. The cold slug control device uses side injection and a cold slug well at the gate position to trap the first cold slug entering the mold, eliminating silver streaks on the product surface. The vacuum exhaust device includes a vacuum generator installed on the outer side of the moving mold. Through exhaust holes and grooves on the first insert, it draws the mold cavity to a negative pressure of -0.06 to -0.09 MPa within 0.3 to 1.0 seconds after mold closing, allowing gas to be pre-expelled during rapid filling, preventing trapped air bulging and burning. The independent conformal cooling device provides parallel independent cooling water channels directly connected to the interior of the gate insert for each second insert, without bridging by other mold plates, achieving rapid and precise cooling of the gate area and solving the problem of gate whitening.

This invention relates to the field of precast concrete mold technology, and more particularly to a high-span precast concrete construction mold, comprising a bottom mold; and a mold assembly, disposed above the bottom mold, including a first support mold, a second support mold, and two second side molds. The first and second support molds are respectively fixedly installed at both ends of the top of the bottom mold, and the two second side molds are fixedly installed on the side walls of the first support mold. Through the movement of the vibrating assembly, the concrete poured into the mold assembly is evenly distributed by the pouring pipe and simultaneously vibrated, improving the density and structural strength of the precast component, ensuring the stability and consistency of the component's forming quality. The reciprocating sliding of the push plate subjects the concrete to uniform lateral pressure, optimizing the concrete flow distribution, reducing the risk of micro-cracks, and simultaneously creating a dynamic compaction effect with the vibrating assembly, eliminating trapped air bubbles in the corner areas of the mold assembly, and improving the filling density of the corner concrete.

The utility model relates to a water purifier, the water purifier comprises a hot water container, the hot water container comprises a tank body, the tank body is provided with a water storage cavity and a first water outlet communicated with the bottom of the water storage cavity; the second pump body is transversely arranged below the tank body and comprises a second water outlet, a pump chamber and a second water inlet which are communicated in sequence; the second water inlet is communicated with the first water outlet, and the second water outlet is located in the top of the pump cavity. According to the water purifier and the hot water container of the water purifier, the arrangement position of the second pump body and the arrangement position of the second water outlet of the second pump body are optimized, so that air trapping in the pump cavity can be reduced or avoided, and meanwhile, the occupied space of the hot water container in the height direction of the water purifier can be saved.

The application discloses a kind of upper and lower layered impact-resistant super-hydrophobic surface micro-nano structures, including substrate and the composite structure layer being set on the substrate, the composite structure layer includes upper layer open structure and lower layer closed structure;The upper layer open structure includes the protrusion type microstructure unit array;The lower layer closed structure includes the closed microstructure unit array;The bottom height of the upper layer open structure is not less than the opening end height of the lower layer closed structure.The application is by open protrusion structure being set in upper layer, closed recess structure is set in lower layer and height relationship is limited, static liquid drop only contacts upper layer to realize low adhesion, under dynamic impact, lower layer structure intercepts three-phase line and uses trapped air layer to convert impact energy, so as to give consideration to the static super-hydrophobic performance of structure and dynamic impact-resistant performance.

The present disclosure discloses a sealing structure, including: a first housing including a raised upper connecting wall; the second shell can be buckled with the first shell and jointly surround and limit the annular sealing cavity, the second shell is provided with a lower connecting wall and an upper connecting wall and / or an exhaust groove formed in the lower connecting wall and communicated with the annular sealing cavity, the exhaust groove is communicated with the outside in the buckling process of the first shell and the second shell, and after buckling is completed, the exhaust groove is communicated with the outside. And the exhaust groove is sealed by a sealant arranged between the upper connecting wall and the lower connecting wall. According to the sealing structure, gas in the annular sealing cavity can be rapidly exhausted in the sealing assembly process, the balance of air pressure inside and outside the cavity after sealing is improved, rubber line breakage or sealing failure caused by air trapping is fundamentally avoided, meanwhile, no hole needs to be additionally formed in the appearance face of a product, and the integrity and consistency of the appearance of the product are guaranteed.

An air removal apparatus for an autoinjector is disclosed. The air removal apparatus can remove or trap air within the autoinjector, preventing the removed or trapped air from displacing medicament or being injected into the patient. The air removal apparatus removes or traps air by creating a vacuum. The vacuum can remove air from the medicament and can trap air within a section of the auto injector that is separated from the medicament.

The utility model relates to a motor rear cover casting mold, the top end of an upper mold is provided with an injection molding opening, and the left side of the injection molding opening is provided with a slag discharging groove used for discharging impurities in molten metal liquid; an opening and closing assembly used for discharging impurities on the filter plate to the slag discharging groove is arranged on the left side of the filter plate. During molding, molten metal liquid is poured into the injection molding opening and enters the storage cavity, the molten metal liquid in the storage cavity is poured into the molding cavity along the two injection molding pipes, trapped air in the molding cavity can be discharged through the two air outlet grooves, and meanwhile cooling of the motor rear cover in the molding cavity can be accelerated; meanwhile, the cooling pipe spirally cools in the cooling cavity, so that the cooling of the motor rear cover in the forming cavity can be accelerated; and finally, the limiting plate is controlled by the handle to move the sealing plate upwards, so that the injection molding opening can be communicated with the slag discharging groove, and the cooled impurities on the filter plate can be discharged along the slag discharging groove.

The utility model discloses an elastic air layer fabric which comprises an outer layer, a middle layer, a secondary inner layer and an inner layer which are sequentially stacked, the outer layer is a cotton-polyester interwoven layer, the middle layer is a polyester layer, the secondary inner layer is a cotton-like polyester layer, and the inner layer is a spandex layer. The elastic air layer fabric has a four-layer structure, the outer layer is durable and crease-resistant, so that the fabric is easier to clean, the middle layer can store air, heat conduction is reduced, a good warm-keeping effect is provided, the portability of the fabric is kept, and the secondary inner layer has certain moisture absorption and sweat releasing performance, so that comfortable wearing experience can be provided; the inner layer enables the fabric to have excellent stretchability and resilience, the fabric can be tightly attached to the body when being worn, good wrapping feeling and comfort are provided, and the warm keeping effect is enhanced.

The present invention is directed to a system, device, apparatus, methodology, technique and kit that allow a party to more effectively purge a hydraulic system of trapped air, along with any residual oil. The configuration of the present invention, which connects to the external hydraulic system, collects the residual oil in an accumulation chamber with transparent sides. A worker can thus see the progress of the hydraulic purge and easily dispose of the oil without mess and exposure.

This invention discloses a simulation calculation method for deep tunnels containing trapped air masses, comprising: considering three known different trapped air mass formation mechanisms, constructing a model of air mass deformation, motion, and trapped air mass assumptions; based on the air mass deformation, motion, and trapped air mass assumption models, constructing models of air mass morphology, air mass pressure head, and control parameters in the deep tunnel; constructing parameterized assumption models of trapped air masses under different dimensions of calculation based on the air mass morphology, air mass pressure head, and control parameter models in the deep tunnel; and calculating the transient pressure caused by water flow impact in the deep tunnel containing trapped air masses based on the trapped air mass parameterized assumption models and the water-air two-phase flow simulation calculation model. This method can be used in modern information technology simulation calculations to solve the problem of trapped air masses that conforms to the layout and actual conditions of deep tunnel systems, thereby achieving real-time monitoring and simulation of the operation of deep tunnels containing trapped air masses.

A fluid bubble valve device or element, method, system, and apparatus may comprise multiple films or webs aligned on top of each other. For example, two separate material webs or film layers may be formed from two or more different film layers combined to provide various necessary advantages in the manufacture or formation of the valve and sealing it to a pouch or package later. Two individual forming webs or film layers are fed together into a machine to form a channel seal and bubble pocket, creating a path for controlling the direction in which the fluid product flows later when the finished pouch or package is used by the consumer. The pocket is formed simultaneously in both of the two individual forming webs or film layers. A separate lid material web or layer is introduced and sealed beneath the bubble pocket to trap air or gas between the lid layer and the individual forming webs or film layers combined.

A fender for boats formed from a flexible shell constructed of an air impervious material constructed and arranged to entrap a volume of air. The shell formed from a continuous sidewall having an upper edge and a rectangular shaped bottom wall forming an interior. A reusable zipper seal is attached to the sidewall near the upper edge. The seal provides an airtight interior for trapping air. The shell includes clips attached to a bottom sidewall releasably attachable to reciprocal clips attached to an upper edge of the sidewall. When the fender is in a deflated condition, the shell may be stored flat or in a roll position. When the fender is inflated, the seal traps air in the interior. The upper edge of the sidewall is rolled and secured by the clips to compress air within the shell. When the fender is inflated, the fender can be secured to a boat or dock to protect the boat from impact, wherein the fender absorbs the impact load.

A metal foam-based filtration system and method for removing sub-micron particles and contaminants from a gas or fluid flow with the use of ultralow density metal nanowire meshes that have nanometer to micron scale pores for trapping air / fluid-borne particulates. Filters can use metal foams and coated metal foams alone or in tandem. The size and density of pores in the foam can be adjusted with synthesis conditions. Foams with pore size gradients promote the trapping of different sized particulates at different regions of a foam. Multiple rounds of electrodeposition may be applied to increase the surface area and curvature of a nanowire mesh and strengthen the mesh to make it self-supporting, free-standing and capable of supporting a much heavier mass without collapse. A metal and / or a coated metal foam can act as a catalyst or substrate for absorption or adsorption to capture target particles and / or contaminants.

The application discloses a pressure relief pipeline structure for dispersing high-pressure trapped air mass in a deep tunnel, comprising a plurality of pressure relief pipelines in communication with a deep drainage tunnel, wherein the pressure relief pipelines are located at the top of the deep drainage tunnel, each of the pressure relief pipelines extends along the axial direction of the deep drainage tunnel, the plurality of pressure relief pipelines are sequentially and staggeredly arranged on the deep drainage tunnel, and the end portions of two adjacent pressure relief pipelines cross each other in the horizontal direction. The application can disperse the high-pressure trapped air mass in the deep tunnel drainage system into a plurality of small-volume air masses by step-by-step pressure relief and energy dissipation without affecting the flow section of the deep tunnel drainage system, so that the air explosion phenomenon of the deep tunnel drainage system is avoided.

This application discloses a multi-stage venting groove anti-trapped air component for injection molds, including a venting seat. The top of the venting seat has a rectangular groove, the inner bottom wall of the rectangular groove has an installation groove, and the inner bottom wall of the rectangular groove has symmetrical grooves. The top of the limiting frame is symmetrically fixedly connected to two fixing rods, and the top of the two fixing rods is fixedly connected to a fixing plate. The limiting frame has symmetrically opened circular holes, and the circular holes are into which limiting rods are inserted. The two fixing rods are slidably connected to a carrying plate, and a spring is fixedly connected between the carrying plate and the fixing plate. The inner bottom wall of the installation groove has an air outlet groove, and the inner bottom wall of the air outlet groove has an air outlet hole. Compared with the prior art, which requires removing the positioning plate and then taking out the air outlets one by one when it is necessary to disassemble and replace one of the multiple venting plates or clean the venting groove on the venting plate, this application is more convenient, faster and more efficient, improving work efficiency and reducing working time.

A method and apparatus for a two-piece capsule configured to expel air and reduce bubbles within a composition. The invention features a capsule with a cap and body, where the cap includes an insert with a dome shape designed to compress against the meniscus of a fluid composition or powder. This compression minimizes trapped air and enhances the capsule's structural integrity and longevity. Additionally, the capsule may employ a sealing element to prevent leakage, ensuring a stable, bubble-free environment for the contents. The capsule's design allows for efficient filling and reduces oxygen exposure, thus preserving the quality of the encapsulated material. The invention can be used for both powder and liquid encapsulations, enhancing shelf life and stability by significantly reducing internal air and maximizing fill volume.

This invention discloses a pore pressure sensor calibration device, including a lifting device, a liquid level cup, a hose, a calibrator, and a data acquisition instrument. The lower end of the lifting device is fixedly connected to the liquid level cup, and the lifting device is used to move the liquid level cup up and down. The calibrator has an inner cavity for placing the pore pressure sensor. The liquid level cup is connected to the upper end of the calibrator through the hose, which communicates with the inner cavity of the calibrator. The lower end of the calibrator has a lower valve. The pore pressure sensor is connected to the data acquisition instrument located outside the calibrator via a data cable. This invention allows water to be injected sequentially into the calibrator, hose, and liquid level cup through the lower valve, making it easy to expel trapped air bubbles. By using the lifting device to raise and lower the liquid level cup as needed, the invention achieves the technical effect of repeatedly calibrating the pore pressure sensor in stages and steps as needed. In the same calibration scenario, only the pressure applied to the pore pressure sensor is changed to collect calibration values, thereby increasing the convenience, reliability, and accuracy of calibration.

This invention discloses a method for preparing a transparent, wear-resistant, superhydrophilic self-cleaning coating, belonging to the field of biomimetic modification technology for transparent material surfaces. The raw materials for this transparent, wear-resistant, superhydrophilic self-cleaning coating include ammonia, hollow nanoparticles, nanotubes, modified aluminum dihydrogen phosphate, tetraethyl orthosilicate, siloxane, surfactant, and solvent. The hollow nanoparticles and nanotubes in this invention contain a large number of -OH groups on their surfaces, which can chemically crosslink with tetraethyl orthosilicate and siloxane through dehydration condensation to form nanocomposite fillers, which are then embedded in the superhydrophilic coating, thereby forming superhydrophobic and oleophobic sites on the coating surface. The physical air cushion formed by these superhydrophobic and oleophobic sites traps air, forming a "solid-air-oil" composite interface, ensuring the coating has excellent lubricating properties. Because the superhydrophilic, highly polar surface of the coating matrix of this invention does not depend on the micro / nano structure, the coating exhibits excellent wear resistance.

The invention discloses an air filtering membrane for capturing biological aerosol, a pollution treatment composite membrane as well as a preparation method and application of the air filtering membrane and the pollution treatment composite membrane, and belongs to the technical field of filtering membranes. According to the technical scheme, the filtering membrane is prepared from dopamine and gelatin according to the mass ratio of (0.01-0.02): 5 through a dopamine-guided phase inversion process; the preparation method comprises the following steps: 1) preparing a membrane solution; (2) molding a porous structure; 3) forming the filter membrane; 4) vacuum drying; according to the biological aerosol pollution treatment composite membrane prepared from the air filtering membrane, an AIE gemini surfactant G-CDPP is modified on the basis of the air filtering membrane, and the structural formula of the G-CDPP is shown in the specification. The limitation of a traditional single-function filtering technology is broken through, and a precise and high-adaptability material platform is provided for active prevention and control of biological aerosol pollution risks in different scenes.

This invention relates to the field of rubber tire injection molding technology, and more particularly to a method for preparing tires with a low rolling resistance zoned tread structure. The method includes collecting shrinkage property parameters of multi-component rubber compounds and mold cavity temperature parameters; controlling the injection molding machine to simultaneously inject high- and low-modulus rubber compounds into the mold cavity according to the parameters, constructing a multi-component tread rubber body with a trapezoidal overlap structure; during the cooling stage, pumping gas into the microporous venting layer at the bottom of the rubber storage tank to form a directional venting airflow; calculating the physical warpage stress curve based on the cavity temperature parameters and rubber compound shrinkage property parameters, and dynamically adjusting the gas pumping pressure and flow rate accordingly, so that the venting airflow can carry away trapped air and exert a guiding force on the overflowing rubber compound, preventing the overflowing rubber compound from clogging the pores of the microporous venting layer, thereby maintaining unobstructed venting channels during the cooling cycle. This invention optimizes the venting process in injection molding, improving the tire tread molding quality and mold reusability.

This invention discloses an in-mold spraying mold and a method for forming using the mold. The mold includes a mold body comprising a front mold and a rear mold. When the rear mold and the front mold are closed, at least two mold cavities are formed. One cavity is a substrate mold cavity with a spraying flow channel sealing structure, and the other is a spraying mold cavity. The front mold has a first injection port communicating with the substrate mold cavity and a second injection port communicating with the spraying mold cavity. A rapid core-pulling venting mechanism is provided at the overflow end of the spraying mold cavity. By integrally molding the spraying flow channel sealing structure onto the plastic substrate, the spraying mold cavity is sealed by compressing the plastic substrate during mold closing, resulting in strong sealing performance and reducing the precision requirements for mold processing. The rapid core-pulling venting mechanism efficiently discharges mold gases, eliminates trapped air, and prevents pores and bubbles from appearing on the product surface. The good venting effect ensures a uniform and dense coating, allows for precise gas control, and stabilizes product dimensions and performance.