38results about How to "Avoid flow marks" patented technology

The invention relates to equipment for spraying casting coating to the surface of molding sand for sand mould casting. The equipment comprises a bottom plate, a tumbling device and a coating device, ahole is formed in the middle portion of the front end of the bottom plate, the tumbling device is mounted on the upper end surface of the middle portion of the bottom plate, and the coating device isinstalled on the inner side face of the upper end of the tumbling device. The invention can solve the problems that an existing spraying machine cannot prevent flow marks and accumulation of coating,a nozzle cannot be rotated and tilted, the coating cannot cover the surface of a sand mould from all directions, and the spraying angle cannot be adjusted at will; and the function of automatically spraying the casting coating to the surface of the molding sand can be realized.

The invention discloses a smokeless polishing solution for aluminum products. The smokeless polishing solution is prepared from, by weight, 50%-65% of phosphoric acid, 15%-20% of sulfuric acid, 1%-3% of aluminum salt, 10%-15% of water and 3%-10% of additives. The additives comprise, by weight, 15%-20% of sorbitol, 8%-12% of sodium dodecyl benzene sulfonate, 2%-6% of polyethylene glycol, 8%-10% of sodium tripolyphosphate, 3%-8% of cupric sulfate pentahydrate and 48%-55% of water. By adopting the smokeless polishing solution, the polishing effect of a traditional three-acid polishing solution can be basically achieved, no yellow smoke is generated, and no flow mark is generated when drip hanging is conducted for a long time.

The invention discloses an auxiliary drainage tool and a method for preventing electrophoresis flow marks from being generated on the surface of an automobile body. The auxiliary drainage tool comprises a fixing device, a drainage liquid collection plate and a hanging rod. The fixing device is used for being fixed to the automobile body in use. The drainage liquid collection plate is used for guiding electrophoretic paint flowing out of cracks of the automobile body in the roasting process to be away from the automobile body. The hanging rod is connected with the fixing device and the drainage liquid collection plate. According to the auxiliary drainage tool, electrophoretic liquid squeezed out of the cracks of a metal plate of the automobile body in the roasting process of the automobile body can be converged and guided to be away from the automobile body through the fluid mechanics principle, and thus the flow marks are prevented from being generated on the outer surface of the automobile body.

The invention relates to a high-light spray-free acrylonitrile-acrylate rubber-styrene terpolymer (ASA) / polymethyl methacrylate (PMMA) air-inlet grille special composite material and a preparation method thereof. The composite material consists of the following components in parts by weight: 20-40 parts of acrylonitrile-styrene (AS) resin, 35-45 parts of ASA high rubber powder, 35-45 parts of PMMAresin, 2-4 parts of modified metal powder, 0.5-1 part of an antioxidant and 1-2 parts of a lubricating agent. The composite material has the advantages that surface modification is carried out on themetal powder, so that the compatibility between the metal powder and the resin is improved, the overall fluidity of the material is improved, and flow marks formed in a material injection molding process can be effectively avoided while the comprehensive performance of the material is improved. According to the prepared high-light spray-free ASA / PMMA air-inlet grille special composite material, the excellent mechanical property, chemical oil resistance, weather resistance and processability of the ASA and PMMA materials are achieved, and the metallic texture is also achieved. Paint spraying treatment is not needed, so that the manufacturing efficiency of the automobile air-inlet grille is greatly improved, and the manufacturing cost is greatly reduced at the same time, so that the application prospect is very wide, and the composite material has a good economic value.

The invention discloses an oil inlet sealing ring material for a vehicle brake master cylinder and a process thereof for manufacturing a sealing ring. The material is prepared from the following components in part by weight: 80 to 120 parts of ethylene propylene rubber, 4 to 6 parts of active agent, 1 to 3 parts of lubricant, 2 to 4 parts of acid-base balance agent, 1 to 3 parts of age resistor, 2 to 4 parts of sulfurizing agent and 25 to 35 parts of inorganic filler; then the components are subjected to the processes, namely mixing and molding, primary sulfurizing, punching and edge removingand secondary sulfurizing to obtain the oil inlet sealing ring material product with high strength, low compression deformation, tear resistance, resistance to braking fluid corrosion, resistance to low and high temperatures and excellent performance for the vehicle brake master cylinder; and the production efficiency and the product percent of pass are high, and the product can completely substitute similar imported products.

The invention discloses a silica gel sponge material which comprises polyurethane sponge and a silica gel solution, and a functional auxiliary agent is added into the silica gel solution. The preparation method comprises the following steps: S1, designing the size and thickness of polyurethane sponge, the flowability of a silica gel solution and the proportion of a functional auxiliary agent according to product requirements; s2, according to design requirements, cutting the polyurethane sponge into sheets with corresponding thicknesses by using cutting equipment; s3, preparing a silica gel solution with corresponding flowability according to design requirements, and adding a functional auxiliary agent in a corresponding proportion into the silica gel solution; and S4, adding a silica gel solution on the polyurethane sponge sheet. According to the silica gel sponge material and the preparation method thereof, the silica gel solution is added on the polyurethane sponge, so that the polyurethane sponge has the effect of multiply increasing the tearing strength, meanwhile, the oxidation resistance and the high temperature resistance are improved, and the silica gel can also inhibit the generation of bacteria.

The invention discloses an injection molding device for plastic pipe clips, relates to the technical field of injection molding equipment, and comprises a base, a lower injection mold, an upper injection mold, a filling mechanism and a demoulding mechanism. The invention realizes the change of the size of the gate by setting the filling mechanism, ensures that the flow state of the melt glue in the front and rear injection molding processes of the transition section remains consistent, and avoids the occurrence of flow marks; the injection molding process in which the gate size changes from small to large, flows through The melt in the runner will not maintain a high impact pressure all the time, which not only ensures the quality of the injection molding product, but also makes the mold have a longer service life, and can get rid of the air bubbles accumulated on the inner wall of the heating barrel to prevent Air enters the cavity and causes cavities inside or on the surface of the injection molded product; by setting a demoulding mechanism that cooperates with the filling mechanism, the adhesion to the mold is reduced, making it easier to demould, and the injection molded product will not be deformed Even damage the purpose.

The invention provides a casting coating for a coated sand mold and a preparing method of the casting coating. The casting coating comprises main components including, by mass percent, 49%-51% of zircon powder, 2%-3% of sodium bentonite, 1%-2% of polyvinyl alcohol, 5%-10% of silica sol, 0.2%-0.35% of sodium carboxymethyl cellulose (CMC), 0.2%-0.35% of a penetrating agent JFC, 0.3%-0.4% of an anti-foaming agent and the balance water. The prepared casting coating for the coated sand mold is high in drying speed and smooth in coasting, sand cannot be stuck to the casting obtained after coated sand casting, the coating is resistant to molten steel scouring, the surface finish degree is high, and the quality is good.

The invention relates to the technical field of casting and discloses a metal casting mold capable of stabilizing internal air pressure based on high-end manufacturing. The metal casting mold comprises a mold body; a bearing air plate is arranged in the mold body; an extrusion rod is fixedly connected to the top of the bearing air plate; a lever is rotatably connected to the top of the extrusion rod; a ventilation rod is rotatably connected to the right side of the lever; an air baffle is arranged at the bottom of the ventilation rod; an air blocking wheel is arranged above the bearing air plate; an extrusion air box is slidably connected to the side face of an extrusion air plate; an air spring is fixedly connected to the right side of the extrusion air box through a guide pipe; the rightside of the air spring is fixedly connected with a linkage rod; and the left side of the linkage rod is fixedly connected with an expansion plate. According to the metal casting mold capable of stabilizing the internal air pressure based on high-end manufacturing, through cooperative use of the extrusion rod and the bearing air plate, the effect of preventing fluctuation of the internal air pressure of the mold body during mold exhausting is achieved.

The invention relates to equipment for spraying casting coating to the surface of molding sand for sand mould casting. The equipment comprises a bottom plate, a tumbling device and a coating device, ahole is formed in the middle portion of the front end of the bottom plate, the tumbling device is mounted on the upper end surface of the middle portion of the bottom plate, and the coating device isinstalled on the inner side face of the upper end of the tumbling device. The invention can solve the problems that an existing spraying machine cannot prevent flow marks and accumulation of coating,a nozzle cannot be rotated and tilted, the coating cannot cover the surface of a sand mould from all directions, and the spraying angle cannot be adjusted at will; and the function of automatically spraying the casting coating to the surface of the molding sand can be realized.

The invention provides a polyamide material and a preparation method thereof. The polyamide material with core-shell structure metal toner without spraying is prepared from the following raw materials: low-viscosity polyamide 6 resin, high-viscosity polyamide 6 low-resin, anti- Oxygen agent, lubricant, heat-resistant oxygen aging agent, metal toner with core-shell structure. The spray-free polyamide material prepared by the core-shell structure metal toner has excellent mechanical properties and processing properties, and can be applied to the fields of automobiles and home appliances such as automobile exterior decoration, air-conditioning decorative strips, and exterior decoration structures of small household appliances.

A resin molded body comprising a polymeric material such as one of thermoplastic resin, thermosetting resin, elastomer and rubber added with a desired amount of ferromagnetic brightener having shape anisotropy and a method for producing the same. When the polymer material is in the state of molten resin inside the mold cavity, the polymer material is subjected to three-axis orientation control and orientation distribution control. Orientation of the ferromagnetic brightener in the resin, and displacing the ferromagnetic brightener mixed in the molten resin in a desired direction, by which the ferromagnetic brightener mixed in the molten resin is displaced to the design surface side, The orientation is distributed intensively, and the molding process is carried out by this.

The invention is an inner chamber spraying technology of small-diameter and long-axis parts, which uses a long spray gun rod to realize the spraying of long-diameter inner chamber parts; at the same time, it adopts the method of rotating the parts and automatically feeding the spray gun during the spraying process, During the spraying process, the movement track of the spray gun coincides with the rotation axis of the part, which ensures the uniform coating of the inner cavity of the part, avoids other uneven phenomena such as flow marks or missing coatings in the inner cavity paint layer of the part after spraying, and controls the spraying The static balance change value of the front and rear parts is within 300g.mm, which can be widely used for the inner cavity spraying of small diameter and long shaft parts.

The invention discloses a rubber spring material for an automobile braking double-cavity serial brake valve and a preparation method thereof. The rubber spring material comprises the following raw materials in parts by weight: 80 to 120 parts of natural rubber, 4 to 6 parts of activating agent, 1 to 3 parts of lubricating agent, 0.3 to 0.8 part of antiscorching agent, 2 to 4 parts of vulcanizing agent and 75 to 125 parts of carbon black. The preparation method comprises the following steps of: performing hybrid forming on the raw materials; vulcanizing; removing edges through punching; and detecting. The prepared rubber spring material for the automobile braking double-cavity serial brake valve has the advantages of high strength, tear resistance, low compressive deformation, brake fluid resistance and superior aging resistance; qualification rate and production efficiency of a product can be guaranteed by using a vulcanization molding process; and a domestication process of high-end automobile parts is accelerated.

The invention relates to a structure capable of preventing a sizing material in a pouring gate from being broken in a mold. The structure is differently characterized by comprising a front mold and a rear mold, wherein a sizing material feeding channel is formed in the rear mold; the rear mold comprises a rear mold core, a straight ejector block and a straight ejector rod; a cavity forming part used for forming the peripheral surface of a cavity part is arranged at the upper end of the rear mold; a sizing material feeding channel forming part used for forming the peripheral surface of a sizing material feeding channel part is formed in one side of the straight ejector block; the sizing material feeding channel forming part is matched with the rear mold core to form a sizing material feeding channel; the sizing material feeding channel forming part comprises a first section extended downward from the upper end of the straight ejector block and a second section connected with the first section and transversely extended to the lower part of the cavity forming part; pouring gate forming parts connected with the cavity forming part are formed in the second section of the sizing material feeding channel; a connection channel forming part used for connecting the cavity forming part with the first section of the sizing material feeding channel is also formed in the upper end of the straight ejector block; material preventing bulges are formed near the connection channel forming part on the cavity forming part. The structure is capable of taking the product and the sizing material in the pouring gate together.

The invention relates to an automatic cast molding sand surface spraying system. The automatic cast molding sand surface spraying system comprises a bottom plate, a rolling device, a compaction deviceand a coating device. A hole is formed in the middle portion of the front end of the bottom plate. The rolling device is arranged on the upper end face of the middle portion of the bottom plate. Thecompaction device is arranged on the inner side face of the lower end of the rolling device. The coating device is arranged on the inner side face of the upper end of the rolling device. The automaticcast molding sand surface spraying system can solve the problems that according to an existing spraying machine, flow marks and stacking of coatings cannot be prevented, a sprayer cannot rotate or incline, the coatings cannot comprehensively cover the surface of a sand mould, the spraying angle cannot be adjusted at will, and secondary compaction cannot be conducted on the surface of molding sand; and the function of automatic spraying of the casting coatings to the surface of the molding sand can be achieved.

The invention discloses a smokeless polishing solution for aluminum products. The smokeless polishing solution is prepared from, by weight, 50%-65% of phosphoric acid, 15%-20% of sulfuric acid, 1%-3% of aluminum salt, 10%-15% of water and 3%-10% of additives. The additives comprise, by weight, 15%-20% of sorbitol, 8%-12% of sodium dodecyl benzene sulfonate, 2%-6% of polyethylene glycol, 8%-10% of sodium tripolyphosphate, 3%-8% of cupric sulfate pentahydrate and 48%-55% of water. By adopting the smokeless polishing solution, the polishing effect of a traditional three-acid polishing solution can be basically achieved, no yellow smoke is generated, and no flow mark is generated when drip hanging is conducted for a long time.

The invention discloses an automatic liquid-blocking type plastic glass, which comprises a black edge layer and a transparent layer. The black edge layer is connected to the transparent layer. The black edge layer is provided with a curtain-coating baffling rib. The black edge layer is arranged between the curtain-coating baffling rib and the transparent layer. The black edge layer is provided with a through hole. One end of the through hole is an external opening end, the other end of the through hole is an internal opening end, and the transparent layer seals the internal opening end. The structure is reasonable; during the process of front curtain-coating, the curtain-coating liquid is prevented from flowing to the back surface, the flowing mark on the appearance after thermosetting isavoided, the surface quality of the transparent layer is guaranteed; the curtain coating liquid will not stay on the interface between the external edge of the black edge layer and the transparent layer, thus the moulding effect is ensured, and the performance and appearance are both qualified.