32results about How to "Eliminate weld lines" patented technology

The invention discloses a high-brightness non-melted mark steam injection mold and a using method thereof. The high-brightness non-melted mark steam injection mold consists of an upper mold, a lower mold, a pouring system, a cooling water channel and an ejecting mechanism; the upper mold has an inlaying structure and consists of an upper mold inlaying plate, an upper-layer insert and a lower-layer insert, the upper-layer insert and the lower-layer insert are fixed in the upper mold inlaying plate, and the lower-layer insert is provided with a steam channel; the lower mold has an inlaying structure and comprises a lower mold inlaying plate and a lower mold insert, the lower-layer insert of the upper mold and the lower mold insert form a cavity, and the lower mold is internally provided with the cooling water channel; the pouring system is connected with the cavity by the upper mold inlaying plate, the upper-layer insert, the lower-layer insert and the lower mold insert; and the ejecting mechanism consists of an ejector rod, an ejector sleeve and a top plate. In the invention, a heat-insulating plate is arranged for heat insulation so as to deform the upper mold, improve the productquality and prolong the service life of the mold; the inlaying structure is adopted to effectively utilize the materials; and feeding is carried out from the inside of the product so as to have markson the surface after a sprue is removed, and ensure the outer surface quality of the product.

The invention discloses a sharp cooling and sharp heating highlight forming die, belonging to the technical field of injection moulding. The invention comprises a cavity insert and is characterized in that the inside of the cavity insert is provided with a plurality of cooling water channels transversely and a steam line; the steam line contains a main gas inlet pipe, shunts and a main gas outletpipe; the main gas inlet pipe extends in the upper right of the cavity insert and extends to the middle part of the cavity insert; four shunts are connected on the main gas inlet pipe side by side and extend downwards; the tail parts of the four shunts are connected with the main gas outlet pipe; and the main gas outlet pipe is arranged transversely and extends out of the lower left of the cavityinsert. The invention solves the problem of the prior art that the injection moulding equipment can not realize the fast heating and fast cooling of the mould, thus the product has the appearance quality defects such as weld marks and flow marks, and provides the sharp cooling and sharp heating highlight forming die which has simple structure and can realize fast heating and fast cooling and achieve better injection moulding effect.

The invention relates to a metal-imitating ABS modified material. The metal-imitating ABS modified material consists of the following components: 70-95 parts of ABS, 0.5-10 parts of pigments, 1-5 parts of a coupling-lubricating composite modifier, 5-10 parts of a tackifier, 0-10 parts of filler and 0.1-1 part of an antioxidant, wherein the trademark of the coupling-lubricating composite modifier is YY-503, and the number-average molecular weight of the coupling-lubricating composite modifier is 3000-5000; a low melting point of the coupling-lubricating composite modifier is 75 +/- 5 DEG C, and a high melting point of the coupling-lubricating composite modifier is 150 +/- 10 DEG C; the tackifier is C5 petroleum resin with average molecular weight of 1000-2500. The metal-imitating ABS modified material can be used for overcoming the problems that weld marks are severe, the metal effects are not good and the impact strength is declined in the prior art, and has a wide application prospect in the industry of plastic products.

The invention relates to an ultrasonic vibration micro-foaming injection moulding device and an ultrasonic vibration micro-foaming injection moulding method for a plastic inspection well, and relates to the field of injection moulding machining for plastic inspection wells. The ultrasonic vibration micro-foaming injection moulding device comprises a fixed die plate, a movable die plate, a die core and hot runner system, an ultrasonic vibration device and a control system, wherein die cores comprise a main die core and a side pulling core, and a die cavity is arranged among the die cores, the fixed die plate and the movable die plate. According to the invention, a cavitation foaming effect of ultrasonic vibration on plastic is utilized, the die cavity is filled with a plastic melt through injection moulding to reach 85-90% of the volume of the die cavity at first, and then the plastic melt in the die cavity is subjected to overall ultrasonic vibration and cavitation micro-foaming through the main die core provided with an ultrasonic vibration mechanism, thus micro-foaming injection moulding machining for the plastic inspection well is realized. The ultrasonic vibration micro-foaming injection moulding device disclosed by the invention is simple to operate, high in moulding accuracy, and capable of saving plastic raw materials by 10-15%, reducing an injection moulding pressure by 60-80%, saving energy, avoiding or reducing generation of weld marks, enhancing the product strength and prolonging the service life.

The invention provides a molding method for a thin-wall plastic product. The molding method comprises the following steps: injection molding of the thin-wall product, wherein a side gate type glue feeding point is used for feeding glue, the glue feeding point is a single glue feeding point, the glue feeding point is arranged inside a functional hole of the product, and a melt inside the functional hole of the thin-wall product forms a glue feeding position integrally with the thin-wall product after melt injection; and cutting of the glue feeding point, wherein the molded thin-wall product is fixedly arranged on a positioning jig; the glue feeding position inside the functional hole is removed by using a numerically-controlled machine tool. The molding method provided by the invention is convenient in sufficient glue-flowing and filling of the melt; weld marks generated on the surface of the product due to arrangement of the plurality of glue feeding points can be removed; the pressure of the injection molding can be prevented from being too large; meanwhile, the waste of materials and the design difficulty of the die can be reduced; the cost is reduced. Furthermore, a cutter controlled by the numerically-controlled machine tool can be used for cutting the glue feeding position positioned on the positioning jig from the functional hole rapidly and accurately, so that a qualified product can be obtained.

The invention discloses an injection mold structure of a highlight traceless automobile plastic product. The injection mold structure of the highlight traceless automobile plastic product comprises abottom plate, wherein two vertically arranged supports are symmetrically fixedly connected to the upper end of the bottom plate; a tank is fixedly connected to the top ends of the two supports; and acavity is arranged in the tank. According to the injection mold structure of the highlight traceless automobile plastic product provided by the invention, an open-close linkage design of an upper moldand the tank is adopted, when the upper mold moves downwards, an ejector rod drives a support block fixedly connected with the ejector rod to move, the support block moves to further drive a connecting rod to move according to a lever, the connecting rod moves according to the lever so as to drive a baffle plate rotatably connected with the connecting rod to move upwards, a corrugated pipe and abaffle plate are separated at the moment, an air inlet pipe is connected with the steam output end of an external boiler, steam enters the cavity, the corrugated pipe, the upper mold and a lower moldat the moment to accomplish one cycle so as to be discharged from an exhaust pipe, and due to cooling and heating functions of high-temperature stem, welding marks on an injection mold can be eliminated, so that an injection mold product achieves a highlight traceless effect.

The invention relates to an elevator sliding guide shoe liner made of ultra-high molecular weight polyethylene and a preparation method for the elevator sliding guide shoe liner. The shoe liner comprises a product B and two products A oppositely arranged on the product B in the length direction of the product B, and the product B and the two products A are combined to form a structure adaptive to an elevator sliding guide shoe in shape. The products A and the product B are prepared from ultra-high molecular weight polyethylene resin or composite materials with ultra-high molecular weight polyethylene resin as the base body through the injection molding process, the mass fraction of the ultra-high molecular weight polyethylene resin in the composite materials is 45%-75%, and the rest is low molecular weight polyolefine resin. Compared with the prior art, the elevator sliding guide shoe liner is made of the ultra-high molecular weight polyethylene composite materials for the first time, and the application of the ultra-high molecular weight polyethylene composite materials to special-shaped products is achieved through the characteristics of superior mechanical properties of high strength and wear resistance, superior chemical corrosion resistance and superior ageing resistance of the ultra-high molecular weight polyethylene.

The invention provides a mold sudden cooling and sudden heating device adopting a semiconductor refrigerator and a phase change material. The device comprises a control module, a mold heater, a cooling liquid mold channel, a phase change cold storer, a cooling liquid cooling pipe and the semiconductor refrigerator; a phase change part is stored in the phase change cold storer; the cooling liquid mold channel is formed in a mold; the cooling liquid cooling pipe is arranged on the phase change cold storer, and communicates with the cooling liquid mold channel by a controllable valve; a heat endof the semiconductor refrigerator is connected with the mold, and a cold end is connected with the phase change cold storer; when the sudden heating operation is performed on the mold, the heat end ofthe semiconductor refrigerator heats the mold, and the cold end cools the phase change cold storer; and when the sudden cooling operation is performed on the mold, cooling liquid flows in the coolingliquid cooling pipe and the cooling liquid mold channel to quickly cool the mold. Through combination with the advantages of the semiconductor refrigerator and the phase change material, and introduction of a closed-loop feedback control circuit, the device can realize efficient energy-saved sudden cooling and sudden heating adjustment of the mold.

The invention discloses an injection mould and a machining method for a high-glossiness plastic part. The injection mould comprises a cavity and a core, wherein a cavity insert is arranged in the cavity, a core insert is arranged in the core, and a mould cavity is formed between the cavity insert and the core insert. The injection mould is characterized in that a water path hole and a steam path hole are formed in the cavity and the cavity insert; the distance H between the steam path hole and the surface of the mould cavity is 10-12mm; an empty wall groove is formed in and a heat-isolation convex plate is arranged on the inner wall of the cavity; the heat-isolation convex plate contacts with the bottom surface of the cavity insert; exhaust grooves are uniformly distributed in the upper end surface of the cavity insert and located at the outer side and the inner side of the mould cavity; and the distance of each exhaust groove is 20-25mm.

The application provides a mold temperature control method and system of an injection molding machine. The mold temperature control method of the injection molding machine comprises the following steps that after the injection molding machine is closed, a heating system is started to heat a mold temperature to a first preset temperature, and the injection molding machine is controlled to inject rubber into a mold cavity when the mold temperature reaches the first preset temperature; after the pressure maintaining of the injection molding machine is completed, the heating system is closed, a cooling system is started, a mold is cooled to a second predetermined temperature, and after the mold is cooled to the second predetermined temperature, the injection molding machine is controlled to open the mold; and after the injection molding machine opens the mold, the cooling system is turned off. The mold temperature control method can be applied to forming optical products with high transparency, plastic parts with microstructures on the surface, high-strength composite parts, long thin-wall parts and the like. By heating the mold to a higher set temperature, premature cooling of a polymer solution is prevented, and formed injection plastic parts have good surface quality.

The invention relates to a polyolefin material with a spray-free metal effect and a preparation method and an application thereof. The polyolefin material with the spray-free metal effect comprises the following components in part by weight: 5-30 parts of modified spherical micro-particles, 50-80 parts of polyolefin polymer, 0.5-10 parts of sheet metal-effect pigment and 0.1-10 parts of auxiliaryagent; the modified spherical micro-particles are spherical micro-particles modified with a surfactant. According to the polyolefin material with the spray-free metal effect and the preparation methodand the application thereof, the spherical micro-particles are modified by using the surfactant to greatly improve the dispersibility of the spherical micro-particles; the modified spherical micro-particles are good in dispersibility; the sheet metal-effect pigment at the melt junction can be inhibited to deflect with the melt flow direction through the steric hindrance effect to achieve the purpose of eliminating the welding mark of the polyolefin material with the spray-free metal effect; the existing process and equipment do not need to be improved, thus the cost is low.

The invention discloses a multi-air channel auxiliary plastic mold injection molding process, comprising the following steps: step (1) plastic mold design; step (2) mold precooling stage; step (3) melt injection stage; step (4) multiple Airway gas injection control stage; step (5) partial nitrogen filling stage; step (6) gas injection end stage; step (7) gas withdrawal stage. The invention eliminates the internal stress existing in the injection molded parts, so that the quality of the injection molded parts is high, and the production efficiency and yield of the mold are greatly improved.

The invention discloses a device for regulating flow channel flow of a tube blank vacuum forming mold. The device is characterized by comprising a tube blank vacuum forming mold body (1), wherein a hollow tubular main mandrel (2) is arranged in the tube blank vacuum forming mold body (1), a vacuum forming pipe (3) is arranged in the main mandrel (2), the vacuum forming pipe (3) is sleeved in the main mandrel (2) and are coaxially arranged with the main mandrel (2), the lower end of the main mandrel (2) protrudes out the lower surface of the tube blank vacuum forming mold body (1), the lower end of the tube blank vacuum forming mold body (1) is fixedly connected with an inner hollow forming mold (4), the lower end of the main mandrel (2) is sleeved in the forming mold (4), a lower runner arranged at intervals is formed between the outer surface of the lower section of the main mandrel (2) and the inner surface of the forming mold (4), the middle section of the main mandrel (2) is sleeved with a drainage ring (6). The device has the advantages that the defects of the prior art can be overcome, and the structural design is reasonable and novel.

The invention discloses a novel multi-layer plastic extrusion device which belongs to the technical field of plastic extrusion, and solves the problems that weld marks are generated in the conventional plastic extrusion forming and the product quality is low in the market. The device comprises an engine base, wherein a bracket is arranged on the engine base; a motor box is arranged on the bracket; a conical sleeve is connected to the front side of the motor box. The device is characterized in that the conical sleeve comprises three layers; the middle layer is a rotating conical sleeve; an inner fixing conical sleeve and an outer fixing conical sleeve are respectively arranged on the inner layer and the outer layer of the rotating conical sleeve; spiral material conveying channels are respectively formed between the inner surface of the rotating conical sleeve and the outer surface of the inner fixing conical sleeve as well as between the outer surface of the rotating conical sleeve and the inner surface of the outer fixing conical sleeve. Weld marks on a product produced by using the device are effectively eliminated, the product quality is improved, and in addition, the quality of the product is further improved as filtering nets are arranged in the feeding ports of the feeding channels, so that the working efficiency is indirectly improved.

The invention discloses a device for regulating flow of a tube blank plastic suction mold forming runner. The device is characterized by comprising a tube blank plastic suction mold main body (1), wherein a hollow tubular main core shaft (2) is arranged in the tube blank plastic suction mold main body (1), a plastic suction tube (3) is arranged in the main core shaft (2), and the plastic suction tube (3) is connected to the main core shaft (2) in a sleeved mode, and is arranged coaxial with the main core shaft (2); the lower end of the main core shaft (2) protrudes out of the lower end surfaceof the tube blank plastic suction mold main body (1), an inner hollow forming mouth mold (4) is fixedly connected to the lower end of the tube blank plastic suction mold main body (1), the lower endof the main core shaft (2) is connected in the forming mouth mold (4) in a sleeved mode, and an interval is arranged between the outer surface of the lower section of the main core shaft (2) and the inner surface of the forming mouth mold (4) to form the lower runner; and a drainage ring (6) is connected to the middle section of the main core shaft (2) in a sleeving mode. The device for regulatingthe flow of the tube blank plastic suction mold molding runner has the advantages that the device can overcome the defects in the prior art, and the structural design is reasonable and novel.