14 results about "Internal layer" patented technology

This invention discloses a two-color injection molding process for Tritan material, belonging to the field of injection molding technology, which solves the problem of easy delamination and fusion lines in two-layer injection molding of the same Tritan material. The injection mold used in this process includes a male mold, a first injection mold, and a second injection mold. The workpiece includes a transparent inner layer and a transparent outer layer. The steps include: S1. Injecting molten Tritan raw material into the first injection mold heated to 100-130°C to form a transparent inner layer; S2. Cooling the first injection mold to 35-50°C, after mold opening, the transparent inner layer remains in the male mold and rotates 180 degrees to close with the second injection mold, so that the residual temperature of the transparent inner layer is maintained at 35-50°C; S3. Injecting molten Tritan raw material into the second injection mold heated to 100-130°C to form a transparent outer layer on the outer wall of the transparent inner layer; S4. Cooling and solidification; S5. Demolding. This invention achieves molecular chain diffusion and entanglement at the interface of inner and outer layer materials by precisely controlling the temperature of two injection molding processes, resulting in a product with strong interlayer bonding, high transparency, and rich visual effects in a single molding process.

The invention provides a conveying pipeline which comprises an inner-layer pipe body, a heat preservation layer wrapping the outer side of the inner-layer pipe body and an outer protection layer wrapping the outer side of the heat preservation layer which are sequentially formed in the axial direction, and a three-layer composite structure is formed. The inner wall of the inner-layer pipe body is provided with spiral ribs spirally extending in the axial direction, so that fluid in the conveying pipeline forms spiral flow to reduce particle attachment and achieve self-cleaning; a micro liquid guide groove is formed in the side face of the spiral rib and used for guiding condensate water and / or accumulated liquid to be collected to the low point of the conveying pipeline in the preset installation posture, and an external liquid drainage connector can be arranged at the low point so that concentrated drainage can be achieved. The heat preservation layer can be made of aerogel composite heat preservation materials, and micro heating wires can be embedded in the heat preservation layer and used for preventing fluid in the conveying pipeline from being solidified under the low-temperature working condition. The outer protective layer can be a waterproof breathable composite layer to improve the adaptability of protection and condensation prevention. The pipeline has the heat preservation and insulation capacity, the self-cleaning capacity, the liquid guiding and discharging capacity and the anti-condensation capacity, and is suitable for cold and hot medium conveying scenes.

The utility model discloses a compressed air energy storage self-adaptive multilayer composite air storage chamber which comprises an outer-layer metal shell, a middle-layer composite material layer and an inner-layer elastic material layer. The middle composite material layer is fixedly attached to the inner surface of the outer metal shell; the inner elastic material layer is fixedly attached to the inner surface of the middle composite material layer. Through the combination of various materials and the design of an intelligent structure, the strength, the pressure resistance and the safety of the gas storage chamber can be remarkably improved.

The visual ultrahigh-pressure wear-resistant flexible composite pipe comprises an inner layer, the outer wall of the inner layer is coated with a reinforcing layer, and the outer wall of the reinforcing layer is coated with an outer layer. The invention further discloses a manufacturing method of the visual ultrahigh-pressure wear-resistant flexible composite pipe, which comprises the following steps: S1, performing multi-layer co-extrusion on the color master batches with different colors, the polyolefin, the polyolefin elastomer, the antioxidant and the lubricant to obtain the inner layer of the composite pipe; s2, sequentially coating the surface of the inner layer of the composite pipe with one or more reinforcing layer materials; and S3, extruding an outer layer material and coating the outer layer material on the surface of the enhancement layer to obtain the visual ultrahigh-pressure wear-resistant flexible composite pipe. According to the visual ultrahigh-pressure wear-resistant flexible composite pipe and the manufacturing method thereof, the problem that the wear resistance and the crack resistance of an existing flexible composite pipe are insufficient for fluid of a high-wear medium is solved.

In one aspect, a method of co-injection molding a multi-layer article using a co-injection nozzle having an inner outlet, an outer outlet, and an intermediate outlet between the inner and outer outlets is provided. A skin layer material stream is injected from the intermediate outlet into a mold cavity. As injection proceeds, two inner layer material streams are injected from the inner and outer outlets of the co-injection nozzle, respectively. The two streams sandwich the stream of skin layer material and flow behind the melt front of the skin layer material. The sandwiched stream of skin layer material continues to supply skin layer material to the melt front at least until the melt front approaches a distal end of the mold cavity. The resulting article is substantially or completely encapsulated by an outer layer of skin layer material and contains a high proportion of inner layer material.

The invention relates to the technical field of shelling devices with an eggshell recovery function, and discloses a shelling device with an eggshell recovery function, the shelling device comprises a bottom shell and a top shell, the top shell is clamped above the bottom shell and is communicated with the bottom shell, the top of the top shell is fixedly connected with a transmission mechanism, and one end of the transmission mechanism extends to an inner cavity of the top shell. The shelling device with the eggshell recovery function has the advantages of being convenient to use, high in storage capacity and the like, and solves the problems that after an existing shelling device is used for shelling, eggshells are often accumulated in a collecting box, and due to the fact that egg skins always exist on the inner layers of the eggshells in the eggshell collecting process, the eggshells are mutually hooked, the collecting capacity of the collecting box is extremely affected, and the shelling efficiency is high. Eggshells are composed of calcium elements and have large utilization value in fertile fields, and an existing shelling device needs secondary crushing to be used in the fertile fields after collecting the eggshells and is very inconvenient to use.

The application relates to the technical field of composite material manufacturing, and discloses a stiffened wallboard forming device and a forming method. The stiffened wallboard forming device comprises a release cloth, a forming assembly and an encapsulating assembly. The release cloth is wrapped on a wallboard pre-forming body. First and second core molds of the forming assembly are respectively arranged on two sides of a rib in the wallboard pre-forming body and are pressed against the release cloth. One end of a gas permeable hole of the first core mold is open and communicates with an R area of the wallboard pre-forming body, which is beneficial to the discharge of gas in the R area, improves the gas permeability of the stiffened wallboard forming process, and the encapsulating assembly is arranged on the periphery of the forming assembly and encapsulates the wallboard pre-forming body. An inner layer of the encapsulating assembly is provided with a first semi-permeable membrane which is located at the other end opening position of the gas permeable hole. The use of the gas permeable hole and the first semi-permeable membrane guarantees the continuous gas permeability of the rib R area in the forming process, improves the forming quality and the qualified rate of the stiffened wallboard R area, and can continuously pump air and prevent resin overflow during the glue injection process, thereby reducing the waste of resin.

The invention provides a blasting enhancement type gas fracturing pipe and an operation method thereof, the blasting enhancement type gas fracturing pipe comprises a gas fracturing pipe body and a constraint enhancement layer, the gas fracturing pipe body is of a two-layer structure which is sleeved inside and outside, the material strength of the inner layer is higher than a set value, the outer layer and the constraint enhancement layer are integrally arranged, and the space between the inner layer and the outer layer is vacuum; the constraint enhancement layer is formed by weaving a material with certain strength and is provided with a weakening area, the weakening area corresponds to a preset blasting force concentration area, the weaving densities or the material strengths or the material sizes of different areas are different, the constraint force formed by the weakening area is smaller than the constraint force of other areas, an asymmetric constraint field is formed, and detonation waves are forced to diffuse in the radial direction; a plurality of crack guide grooves are formed in the positions, corresponding to the weakening area, of the pipe wall of the inner layer. Through the design of the multi-layer composite pipe body structure, a two-way constraint structure can be formed, stress is concentrated in the preset blasting direction, axial blasting dispersion is reduced, therefore, the hole plugging amount is reduced, the directional blasting energy utilization rate is increased, the structure is simple, and the installation efficiency is improved.

In one aspect, a method of coinjection molding a multilayer article using a coinjection nozzle having inner outlet, an outer outlet, and an intermediate outlet between the inner and outer outlets is provided. A stream of surface layer material is injected into a mold cavity from the intermediate outlet. With the injection ongoing, two streams of internal layer material are injected from the inner and outer outlets of the coinjection nozzle respectively. The two streams sandwich the stream of surface layer material and flow behind a melt front of the surface layer material. The sandwiched stream of surface layer material continues to supply the melt front with surface layer material at least until the melt front nears a distal end of the mold cavity. The resultant article is substantially or entirely encapsulated by a skin of the surface layer material and contains a high proportion of internal layer material.

A multi-layered product having an embossed interior layer is disclosed along with a method of making the product. The multi-layered product has a first layer with an interior surface, a second layer with an interior surface, and a third layer sandwiched between the first and second layers. The third layer has a first surface and a second surface and has a thickness therebetween. The third layer is embossed into a waffle pattern having a plurality of protrusions and a plurality of recesses. Each of the plurality of protrusions and recesses is adjacently aligned and horizontally offset from one another. The plurality of protrusions forms a horizontal plane, at the first surface, which is positioned above a horizontal plane formed by the plurality of recesses, at the first surface. The product also has an adhesive which secures the three layers together.

The present application belongs to the technical field of poultry hatching prevention and control, and particularly relates to a chicken embryo hatching period whole cycle prevention and control method based on phage layered delivery, comprising: screening phage strains suitable for different embryo age stages; preparing a composite carrier matrix with a porous structure by using chitosan and sodium alginate; preparing a layered delivery film by using a laminating film forming process to load different phage strains in the composite carrier matrix; attaching and covering the layered delivery film on the surface of the to-be-hatched egg, and placing the coated egg in a hatching device for hatching; combining the characteristics of the outer layer of the layered delivery film degrading first and the inner layer degrading later, and cooperating with a step-by-step solidification process to ensure the interlayer pores being connected, so that the layered delivery film wrapped around the egg degrades in sequence, and each embryo age chicken embryo can obtain the suitable phage at the corresponding infection risk stage, the hatching whole process is matched with the infection prevention and control stage, and a whole cycle prevention and control system covering early prevention, middle treatment and late targeted elimination is constructed.

The invention provides a vehicle body splicing type composite material frame based on a skin-frame structure and a reinforcing method, and belongs to the technical field of composite material structure design. Determining a vehicle body bearing frame load working condition, and defining a main circumferential frame structure and stiffened plate size parameters; statics analysis is conducted on the vehicle body bearing frame under the load working condition, and stress distribution under all the working conditions is obtained; according to stress distribution, carrying out security constraint on a non-design domain, and carrying out iterative solution by taking a minimum special working condition cost function as a target; determining the main circumferential frame based on the solving result: forming a composite bearing section by adopting a composite material beam with a double-C-shaped section and a square-shaped section which are in rubber riveting coupling connection, and additionally arranging an angle sheet reinforcing layer in a high-stress area; determining an auxiliary frame based on the stress distribution, wherein the method comprises the following steps: constructing an orthogonal reinforced structure by adopting a rectangular section rib interlocking process; the auxiliary frame skin comprises an inner-layer skin and an outer-layer skin; the inner-layer skin is bound with the ribs, and the outer-layer skin covers the splicing seams.