32 results about "Rotational molding" patented technology

The application discloses a quick mounting and dismounting mechanism of a rotational molding mold, and relates to the technical field of rotational molding mold manufacturing and assembly. The mechanism comprises an upper mounting plate, a lower mounting plate and a connecting rod. The upper mounting plate is arranged on the top surface of the first flange of an upper mold, the lower mounting plate is arranged on the bottom surface of the second flange of a lower mold, the connecting rod is vertically arranged and is hinged to the lower mounting plate at the bottom end, and a labor-saving handle is hinged to the top end of the connecting rod. A clamping groove is formed in the top surface of the upper mounting plate, and the end of the labor-saving handle close to the connecting rod is provided with a clamping protrusion matched with the clamping groove. The quick cooperation of the clamping protrusion of the labor-saving handle and the clamping groove of the upper mounting plate replaces the repeated screwing operation of the traditional bolt connection, greatly shortens the mold mounting and dismounting time, significantly improves the rotational molding mold mounting and dismounting efficiency, enhances the mold assembly stability and precision, reduces the operation difficulty, prolongs the service life of the equipment and has the effect.

The present application relates to the technical field of rotational molding, in particular to an integrated rotational molding mold for a septic tank and an integrated molding manufacturing process thereof, characterized in that: the mold comprises an upper mold and a lower mold which are assembled in sequence from top to bottom, a rotational molding cavity is formed between the upper mold and the lower mold, and the two are locked and fixed by a mold closing bolt assembly, two intervally arranged partition nets are arranged in the rotational molding cavity, and the rotational molding cavity is divided into three chambers, the upper part of the partition net is provided with a through hole, the inner sides of the two partition nets are fixedly connected by a connecting rod mechanism, and the outer sides of the two partition nets are both provided with a ejector rod mechanism, which is arranged on the upper mold and used for positioning and fixing the partition net. The septic tank with a partition plate is directly integrally molded, which is beneficial to reducing the overall production energy consumption and labor cost, and makes the overall manufacturing of the septic tank relatively time-saving and labor-saving, and is also beneficial to improving the overall structural strength and pressure resistance, and effectively ensuring the overall sealing performance.

The utility model relates to the technical field of rotational moulding, specifically relates to a rotational moulding mould and rotational moulding device, the rotational moulding mould includes rotational moulding mould body and a plurality of heat conduction parts, one end of a plurality of heat conduction parts is set up in the recessed area of rotational moulding mould body in the way of array distribution, and the other end extends in the direction away from the recessed area. Use this rotational moulding mould, through setting up a plurality of heat conduction parts in the recessed area of rotational moulding mould body, in actual application, can be based on the heat conduction effect and the flow guiding effect of heat conduction part, effectively improve the heating efficiency of the recessed area of rotational moulding mould body, thereby improve the heating uniformity of rotational moulding mould body whole, and further improve the wall thickness uniformity of plastic product.

This invention discloses a precision stamping die, a forming process, and the resulting metal part, relating to the field of precision stamping technology for metal parts. The key technical points are: it includes a lower die base, a support base, a force transmission block, and an upper die assembly. The support base is fixed to the lower die base and has a gradually expanding opening slot. Rotating slots are provided on both sides of the bottom of the opening slot. Two rotary forming parts are symmetrically arranged within the opening slot, with their bottom rotating parts rotatably connected to the rotating slots. A first elastic element is located within the support base, allowing the top of the rotary forming parts to open naturally. The force transmission block slides longitudinally on the lower die base, with a metal blank placed on its top and its bottom connected to the lower die base via a second elastic element. The upper die assembly includes a first pressing rod, which, when descending, presses against the blank, driving the force transmission block downwards. The force transmission block drives the two rotary forming parts to rotate in opposite directions, thereby forming the sidewall of the metal blank in a forward direction, effectively avoiding the problems of metal wires and product defects caused by traditional lateral friction forming methods.

A transparent lampshade for a luminaire, comprising a closed, translucent hollow body (1) whose wall (2) is provided with a recess (3) projecting into the interior of the hollow body (1), forming an externally accessible receiving space for one or more electrical light sources (4), wherein this receiving space is covered externally by a cover (5) which is fixed to the hollow body (1) and simultaneously serves as an interface for the electrical connection of the light sources (4) and for the mechanical attachment of the lampshade to the luminaire. In order to manufacture such a lampshade cost-effectively and stably with a largely free design, the invention proposes that the hollow body (1) and its recess (3) be designed as a one-piece casting made of thermoplastic material using a rotational molding process.

A thermoplastic composition suitable for rotational molding applications comprises a) a melt index I2 of 0.5 to 10 g / 10 min and 0.930 to 0.965 g / cm³. 3 The polyethylene composition comprises a) a polyethylene composition of a certain density; and b) an additive package. The additive package contains a benzofuranone antioxidant compound. The polyethylene composition comprises a first polyethylene component, which is an ethylene copolymer, and a second polyethylene component, which is an ethylene homopolymer or ethylene copolymer; wherein the weight-average molecular weight Mw of the first polyethylene component is... 1 The weight-average molecular weight (Mw) of the second polyethylene component is higher than that of the second polyethylene component. 2 .

This utility model discloses a dual-station rapid mold change rotational molding machine, including a support plate. A support assembly is mounted on the upper surface of the support plate. Two rotating assemblies are mounted on the upper surface of the support assembly. A propulsion assembly is mounted at each end of the two rotating assemblies that are far apart from each other. An injection molding assembly is mounted at each end of the two propulsion assemblies that are far apart from each other. The support assembly includes a support frame located on the upper surface of the support plate, and a first bearing is embedded in the upper surface of the support frame. This device mounts two injection molding assemblies at opposite ends, and through the cooperation of the two sets of rotating assemblies, both injection molding assemblies can be rotated. Furthermore, during processing, while adding material to one injection molding assembly, the other injection molding assembly, after material addition, can be started to rotate, thereby reducing processing time. Therefore, this device effectively solves the problem of existing devices easily leading to wasted processing time.

A rotationally molded type III traffic barricade system has a plurality of bases and uprights adapted to be assembled in a shipping configuration, a transportation configuration and a deployment configuration. Each upright has recess for receiving a warning light and a cushion adjacent the recess for absorbing the impact force of a collision between the barrier and a vehicle. Recesses are also provided in the upright for receiving barricade panels in such a manner that the chance of damage to the panels is minimized during transportation, etc. Dimples in the recesses and opposing cones on the rear surface of the upright guide an assembler as to where to drill holes for bolts that mount the barricade panels to the uprights.

This utility model discloses a rotationally molded self-cooling water tank for engines, including a tank body and an inlet and an outlet disposed on the tank body. The tank body has a first mounting surface and a second mounting surface arranged opposite to each other. One of the inlet and outlet is disposed on the first mounting surface, and the other on the second mounting surface. This utility model dissipates heat from inside the tank body through the cooperation of cooling pipes and a through-flow channel, thereby reducing the temperature of the water in the tank. Specifically, during the rotational molding of the tank body, cooling pipes are placed within the formed through-flow channel. After the tank body has completely cooled, the cooling pipes are automatically clamped, eliminating the need for other fixing devices. This eliminates the need for pre-reserved installation positions, and the fixing method is quick and convenient without increasing the size of the equipment.

1. Name of the product in this design: Fuel Tank. 2. Application of this design: for use in the rotational molding fuel tank of all-terrain vehicles. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

This utility model discloses a rotational molding machine for storage tank production, including a support base. A rotational molding mold is provided above the support base. A first support and a second support are fixedly installed on the upper surface of the support base. A geared motor is fixedly installed on one side of the first support, and a drive roller is fixedly installed at the output end of the geared motor. This utility model, through the cooperation of the geared motor, drive roller, and auxiliary rotating roller, can stably drive the rotational molding mold to rotate. In addition, the uniform heating of the electric heating cover ensures that the plastic powder is fully melted and molded. The contraction movement of the electro-hydraulic push rod can quickly push the mold end cap to fit the rotational molding mold. Compared with traditional manual or simple mechanical methods, this shortens the closing time and avoids the problem of incomplete closure caused by manual operation. Furthermore, when the mold end cap is opened, the extension movement of the electro-hydraulic push rod can drive the mold end cap to reset, quickly opening the mold and improving the efficiency of material unloading and finished product removal.

Suitable thermoplastic compositions for use in rotational molding applications include a) a polyethylene composition having a melt index I2 of 0.5 to 10 g / 10 min and a melt flow rate of 0.930 to 0.965 g / cm³. 3 The density of; and b) the additive package. The additive package contains i) a first hindered phenolic antioxidant compound selected from d,l-α-tocopherol, d,l-β-tocopherol, d,l-γ-tocopherol, d,l-δ-tocopherol, propyl gallate (3,4,5-trihydroxybenzoate), and mixtures thereof; and ii) a first phosphite antioxidant compound having formula I: (I) wherein R 1 R 2 R 4 and R 5 Independently selected from hydrogen atoms and C1-C 12 Alkyl; R 3 Selected from hydrogen atoms and C1-C8 alkyl groups; L represents a single bond or has the formula -CHR 6 - alkylene groups, wherein R 6 It is a hydrogen atom or C1-C 12 Alkyl group; A is an alkyl group having the formula -CHR 7 - Alkylene, having the formula -C*(=O)CHR 7 - carbonyl group, where C * Bonded to O in formula I, or having a carbonyl group of formula -(C=O)-, wherein R 7 It is a hydrogen atom or C1-C 12 Alkyl; wherein one of Y and Z is selected from hydroxyl, alkoxy, aryloxy, alkylaryloxy, and arylalkoxy, and the other of Y and Z is selected from hydrogen and C1-C. 12 alkyl.

This invention belongs to the field of polymer materials technology, specifically relating to polyethylene rotational molding resin powder for high-pressure hydrogen storage cylinder linings and its preparation method. The polyethylene rotational molding resin powder for high-pressure hydrogen storage cylinder linings of this invention is composed of the following raw materials: polyethylene, POE, polyvinylidene chloride, antioxidant, acid scavenger, lubricant, and modified boron nitride; the polyethylene rotational molding resin powder has a melt flow rate of 4.8–5.7 g / 10 min and a density of 0.932–0.938 g / cm³. 3 The bulk density is 0.39–0.45 g / cm³. 3 The flow time is 18–23 s / 100g, the particle size distribution is 40–60 mesh with 50%–65% of the particles, and the hydrogen permeability coefficient is 0.65–0.85 mol·m / (m 2 ·s·Pa)×10 ‑15 It has high bulk density, short dry flow time, reasonable particle size distribution, and low hydrogen permeability coefficient.

This invention discloses a novel method for preparing plastic liners for hydrogen storage cylinders, belonging to the technical field of plastic liner preparation for hydrogen storage cylinders. First, a long-chain vinylimidazolium bromide intermediate is prepared through a nucleophilic substitution reaction of N-vinylimidazolium and bromododecane. Then, anion exchange is performed with lithium bis(trifluoromethanesulfonylimide) to synthesize an alkylvinylimidazolium ionic liquid. This ionic liquid is used to modify the surface of nano-calcium carbonate to introduce reactive sites, and synergistically construct an inorganic reinforcement system with silane-modified fumed silica. Next, inorganic fillers are melt-blended with high-density polyethylene and elastomers to form a composite powder. Finally, a crosslinking agent is added, and the mixture is molded using a rotational molding process of "low-temperature melt spreading and high-temperature in-situ crosslinking." By constructing an organic-inorganic crosslinking network, the liner is endowed with excellent dimensional stability, low-temperature toughness, and fatigue reliability under wide-temperature service conditions.

This utility model discloses a battery pack rotational molding production device for thickening flash, including a first molding box, a second molding box, and a molding ring cover with open ends; the opening of the first molding box is sealed to one open side of the ring cover, and the opening of the second molding box is sealed to the other open side of the ring cover. The three together form a product molding structure with a sealed chamber inside. This utility model can generate flow resistance to the plastic material by setting the baffle column, so that the flash formed in the flash forming chamber has sufficient thickness. Specifically, once the molten plastic material enters the flash forming chamber, due to the presence of the baffle column, the molten plastic material will not be discharged quickly, but there is a flow rate difference between entering and exiting, which facilitates the retention of the molten plastic material, so that the subsequent flash thickness is sufficient.

This utility model belongs to the field of rotational molding technology, specifically a rotational molding machine for producing street lamp covers. It includes a loading assembly for mounting the core components of the rotational molding machine, a receiving assembly on the loading assembly that can drive the street lamp cover mold in compound motion, a positioning assembly on the receiving assembly that can fix the street lamp cover mold, and a temperature control assembly on the loading assembly that can adjust the temperature of the street lamp cover mold. This utility model facilitates the use of a clamping component within a rotating drum that can swing synchronously with the swing table and rotate independently. This clamping component can stably hold and fix the mold using a pad, and can also allow the mold to easily move due to external force using a first universal ball joint. This allows the rotational molding machine to significantly improve production continuity while ensuring finished product quality and reducing the safety risks for operators when removing workpieces.

The invention relates to a main frame (1) for a bicycle having a saddle and a front wheel and a rear wheel, which are arranged in alignment, which main frame is produced in a closed mold from a thermoplastic resin, the main frame being in the form of a single-piece hollow article (2) having a frame wall (3) which encloses the cavity thereof, and the frame wall (3) of the hollow article (2) consisting of one piece produced by means of rotational molding in a rotary mold that can be heated from the outside. The invention also relates to a front fork and to a bicycle frame comprising the main frame and the front fork.

The utility model relates to a kind of anti-drop rotational moulding structure and rotational moulding urea tank, the rotational moulding urea tank has the anti-drop rotational moulding structure, the rotational moulding structure includes anti-drop component, rotational moulding layer and metal layer, anti-drop component one end fixed connection metal layer, the other end free extension, middle part has openwork;Rotational moulding layer is wrapped in the side of metal layer connection anti-drop component, and completely wraps anti-drop component, fills the middle part openwork of anti-drop component completely.The utility model anti-drop component and metal layer and rotational moulding layer or anti-drop component and rotational moulding layer form double-ring interlocking structure, to realize that anti-drop rotational moulding layer and other layer occur to separate;Rotational moulding urea tank using this anti-drop rotational moulding structure, overcome that rotational moulding layer and other layer occur to separate, prolongs service life.

The present invention relates to a process for manufacturing parts of a vehicle body (01), the process comprising rotationally molding a dense outer layer (11, 21), rotationally molding a dense inner layer (12, 22), and processing the inner layer in order to improve the mechanical properties of the part.

This utility model discloses an automatic opening and closing clamping device for rotational molding molds, belonging to the field of rotational molding mold technology. It includes a lower rotational molding mold and an upper rotational molding mold positioned above it. Two sets of opening and closing clamping rods are fixedly connected to the bottom surface of the upper rotational molding mold. The bottom end of each set of clamping rods penetrates the lower rotational molding mold and extends to its lower part. A baffle plate is fixedly connected to the outer surface of each set of clamping rods. Two fitting grooves are formed in the inner bottom wall of the lower rotational molding mold. This automatic opening and closing clamping device, through the cooperation of the lower and upper rotational molding molds, the opening and closing clamping rods, and the baffle plate, facilitates the automatic opening and closing clamping of the upper rotational molding mold. Furthermore, the cooperation of the fitting grooves, sliding grooves, lifting arc plates, and sliding holes facilitates the pulling and demolding of the finished parts adsorbed in the lower rotational molding mold, thereby reducing deformation of the processed finished products and improving the quality of the finished products processed by the rotational molding mold.

A ligature resistant toilet includes a frame that surrounds a bowl assembly. The frame may be made by rotational molding to create a seamless, one-piece component. The frame includes a front surface, a left surface, and a right surface that are all connected to a top surface by a rounded transition surface. A seat assembly is defined on the top surface of the frame and includes a seat that defines a bowl opening. The frame supports a bowl assembly that is positioned within a hollow interior of the frame. The bowl assembly includes a bowl and a spray ring supported by a top surface of the bowl. Piping may be attached to a trapway of the bowl assembly and extend exterior to the frame to an exterior plumbing system.

The application discloses a multi-band radar absorbing polymer structure and a preparation method thereof. The preparation method comprises the following steps: during mold rotation and heating of a rotary forming device, high-density polyethylene composite materials with different carbon nanotube contents are sequentially added into the mold in a preset order in multiple forming stages, so that a multi-layer wave-absorbing structure with a gradient increase in the carbon nanotube content from an outer surface to an inner surface of an article is formed. The application utilizes the sequential feeding characteristics of the rotary forming (rotational molding) process, sequentially adds high-density polyethylene composite materials with different carbon nanotube contents in different stages of mold rotation and heating, and thus integrates the construction of the wave-absorbing functional layer and the forming of the structural member, without secondary coating or lamination bonding, so that different wave bands of radar waves can be effectively absorbed, and the integration of the structure and the wave-absorbing function is realized.

This utility model discloses a high-efficiency heating mold for a rotational molding box. A first frame is fitted onto the outside of the mold body, and a second frame is fitted onto the outside of the mold body. Heating components are provided on the surfaces of the first and second frames, and electric heating tubes are installed inside the first and second frames. Two insulation frames are embedded inside the first and second frames, and heat insulation cotton is embedded inside each insulation frame. Handles are fixedly connected to the surfaces of the first and second frames. This high-efficiency heating mold for a rotational molding box, by fitting a first frame onto the outside of the mold body and fixing the first and second frames to the outside of the mold during use, allows the heating components to be activated. The heating components connect to the electric heating tubes to heat them, and the heat is retained by the heat insulation cotton inside the insulation frames and transferred to the mold body, making the process more efficient.

This application relates to a ball-feeding device and a rotational molding machine composed thereof, belonging to the field of rotational molding technology. The ball-feeding device includes a connecting assembly, a collection box, an upward channel, and a return box. The upper and lower ends of the side wall of the upward channel are respectively provided with horizontally arranged discharge ports and inlets. The discharge port is connected to the collection box, and the inlet is connected to the return box. A hopper is slidably arranged inside the upward channel. The bottom of the collection box is connected to the connecting assembly, and the upper end of the return box is connected to the connecting assembly. The connecting assembly is detachably connected to the filling port of the rotational molding mold. In the final stage of the rotational molding process, this application uses the ball-feeding device to add grinding and polishing balls to the inside of the product to grind and polish the interior of the product, thereby improving the density and smoothness of the inner wall.

The invention discloses inflatable flexible dumbbell and the manufacturing method, comprising first counterweight section, second counterweight section and rigid grip section; First counterweight section includes first inflatable bladder having first air cavity; second counterweight section includes second inflatable bladder having second air cavity; grip includes plastic-textured rigid tubular body having third air cavity; rigid tubular body, first inflatable bladder, second inflatable bladder are made of plastic materials, fillers are arranged in first air cavity, second air cavity, third air cavity; rigid tubular body, first inflatable bladder, second inflatable bladder are made of plastic materials and distributed by rotational molding and separated by a bonding film; the inflatable bladder and the gas contained therein avoid the risk that the dumbbell hits people due to accidental falling, and there is filler in air cavity of grip section, so the volume of the dumbbell is smaller under the premise of equal weight.

The application discloses a special polyethylene resin for rotational molding with high environmental stress cracking resistance, and relates to the polyethylene field.The polyethylene resin is composed of a high molecular weight polyethylene component and a low molecular weight polyethylene component, the melt index (MI 2.16 ) of which is in the range of 0.3 g / 10 min to 25 g / 10 min, the density is in the range of 0.9292 g / cm 3 to 0.9419 g / cm 3 , the molecular weight distribution is in the range of 0.3 to 24.9, the probability of tie molecule formation is in the range of 0.5 to 6, and the environmental stress cracking time is more than 1000 h.The high molecular weight component is used to improve the tie molecule content and crystalline integrity of the resin, and the low molecular weight component is used to improve the processing fluidity and interchain synergistic effect of the resin.The resin realizes multiple balance of the mechanical properties, cracking resistance and processing adaptability of the rotational molding product.The wide distribution polyethylene resin of the application is suitable for rotational molding and has good processing performance and excellent environmental stress cracking resistance.

The utility model discloses a rotomolding seed box for agricultural machine, including the first hinged block of one -end symmetry of box body upper surface is provided with, the connecting rod is set up between two first hinged blocks, the second hinged block of the other end position symmetry of box body upper surface is provided with, the waist groove of the both sides of second hinged block is seted up, the first clamping groove is seted up to the position of two second hinged blocks of box cover, and the first shaft rod is exerted force under the action of the gravity of box cover, and first shaft rod moves down in waist groove, first anti -rotation rib moves down at this moment to make first anti -rotation rib and convex block mutually abut, and box cover can not rotate clockwise, reaches the purpose that fixed box cover, prevents the anticlockwise or clockwise rotation of box cover under the action of strong wind, will not influence the work personnel to add seed to the inside of box body, also will not make the box cover hit the damage of box body under the action of strong wind.