41results about How to "Increase extrusion pressure" patented technology

The invention discloses an internal exhaust type parallel counter-rotating multi-screw extruder and relates to extrusion molding equipment using at least two screw rods which are not meshed with each other. The internal exhaust type parallel counter-rotating multi-screw extruder has the advantages of high extrusion pressure, enhanced plasticizing capacity, reduced energy consumption, remarkable energy saving effect, good feeding performance, exhaust performance and material overflowing prevention performance, and convenience in screw machining, and is suitable for various plastic and rubber machining. The internal exhaust type parallel counter-rotating multi-screw extruder is structurally characterized in that the left end of a main screw rod has a hollow structure, the built-in left end is fixed on an inner screw rod on an end cover, the direction of threads on the inner screw rod is opposite to that of threads on the main screw rod, the right end of the main screw rod is internally provided with an exhaust channel which is communicated with an exhaust channel in the inner screw rod, threads on the main screw rod corresponding to an auxiliary screw rod are single threads, other threads on the main screw rod are double threads, a first through hole connected with the exhaust channel is arranged in the main screw rod between two screw arrises of the double threads, a plurality of second through holes are arranged between the two screw arrises of the double threads on the main screw rod outside the inner screw rod, the end cover is provided with a melt outlet communicated with a cavity between the main screw rod and the inner screw rod, and the center of the end cover is provided with an exhaust port connected with the exhaust channel.

The invention provides a preparation method of a silicon carbide ceramic heat-exchange tube and a product prepared by the method. The preparation method comprises the following steps: (1) uniformly mixing silicon carbide micro powder, carbon black and a water reducing agent, then adding a mixture consisting of water, a dispersing agent, a binder and a lubricant, and carrying out stirring; (2) carrying out pugging on the material obtained in the step (1) under a pressure of 1.0-1.5 MPa and a vacuum degree of -0.08 MPa to 0.1 MPa, repeating the process for 3-5 times until the water content is 15-30wt%; (3) carrying out aging on the material obtained in the step (2) and then carrying out forming treatment to obtain a heat-exchange tube biscuit; (4) raising the temperature of the heat-exchangetube biscuit treated by the step (3) to 60-80 DEG C, and carrying out heat preservation and drying; (5) uniformly spraying a sintering aid onto the surface of the heat-exchange tube biscuit treated by the step (4), carrying out heating to 600-1100 DEG C, then introducing protective gas, continuously carrying out heating to 1500-1700 DEG C, carrying out heat preservation, and then carrying out natural cooling to 25-200 DEG C. According to the invention, the sintering aids such as B4C, Y2O3 and the like are not required in the raw materials of the invention, so that the influence of free metalsilicon on the performance of silicon carbide ceramic is reduced, the strength of the biscuit is high, and the rate of finished products is improved.

A vacuum extruder for making bricks and tiles is composed of stirring unit, extruding-out unit and a vacuum chamber between them. The stirring shaft passes through said stirring unit, vacuum chamber and extruding-out unit. The stirring teeth in stirring box and vacuum chamber can perform the stirring, feeding and quatitative transmission functions. Its advantages are simple structure and high extruding out effect.

The invention discloses a degradable sheet extrusion molding machine. The degradable sheet extrusion molding machine comprises a twin-screw extruder, a single-screw extruder, an automatic constant temperature device, a blanking control device and a die head hoisting device, a discharge port of the twin-screw extruder communicates with a feeding port of the single-screw extruder, and the position of the twin-screw extruder is higher than the single-screw extruder. The blanking control device is arranged on a feeding port of the twin-screw extruder, an extrusion die head is arranged on a discharge port of the single-screw extruder, and the top of the extrusion die head is fixedly connected with the die head hoisting device. Machine cylinders of the twin-screw extruder and the single-screw extruder are divided into a plurality of independent temperature control sections, cooling channels which reduce the temperature of the machine cylinders are formed in the temperature control sections,cast aluminum heaters for heating materials sleeve the outer walls of the temperature control sections, and the temperature of the temperature control sections of the twin-screw extruder and the single-screw extruder is controlled by the automatic constant temperature device. The degradable sheet extrusion molding machine can effectively reduce the production cost, ensure the quality and stabilityof products, and greatly improve the working efficiency.

The invention provides a dual-drive multi-screw extruder, comprising a base as well as a feeding device, a delivering device and a main plasticizing device which are sequentially arranged on the base, wherein a pressurizing and extruding device is arranged at the rear end of the main plasticizing device. The dual-drive multi-screw extruder provided by the invention not only enables plasticized materials to reach an optimal uniform degree but also enables the plasticized materials to be extruded out in a centralized pressure manner, and has the advantages of large output, low energy consumption and higher practical values.

The invention relates to an extruding mould applicable to a PET (Polyethylene Terephthalate) profiled bar. The extruding mould comprises a mould head, a sizing mould, a vacuum exhausting opening, a sizing mould water channel, a water inlet and a water outlet, and further comprises a heating plate, a positioning pin and a sizing mould heat sensor. Compared with the prior art, the extruding mould disclosed by the invention overcomes the problems that the strength of a smelt body is low, the back pressure is low, the crystallization is fast and the mechanical performance is reduced in the PET profiled bar extruding process; the extruding mould can ensure that the PET profiled bar is stably produced through controlling the temperature of the sizing mould; the structure of the mould can obviously increase the extruding pressure of PET in the extruding production process and slows down the cooling speed, so that the PET is sufficiently crystallized and the high mechanical performance is obtained.

A vacuum extruder for making bricks and tiles is composed of stirring unit, extruding-out unit and a vacuum chamber between them. The stirring shaft passes through said stirring unit, vacuum chamber and extruding-out unit. The stirring teeth in stirring box and vacuum chamber can perform the stirring, feeding and quatitative transmission functions. Its advantages are simple structure and high extruding out effect.

The invention relates to an extruder for a hot melt adhesive rod. A spire propel discharging device (6) is arranged under a hopper (4), wherein, a propel screw is drive jointed with an agitating shaft of the hopper (4); a cooling water circular water jacket of a water inlet (1) and a water outlet (5) are arranged around the spire propel discharging device (6); an extruder (10) with a heating unit is connected with lower part of the spire propel discharging device (6), outer end of an extrude screw (9) of the extruder (10) is drivingly connected with a extruded power unit (7); output of the extruder (10) is connected with the extruder head (12) and output of the extruder head (12) is connected with a cooling water groove (13), and a discharge end of the cooling water groove (13) is in serried connected with a first traction roll (14) and a second traction roll (16). The mixed material is enforcedly pushed into the extruder by the spire propel discharging device under momentum function, so quality and productivity of the hot melt adhesive rod are improved.

The invention relates to the technical field of extrusion molding machining, in particular to an extrusion molding device and method for metal seamless pipes. The device comprises a concave mold; the concave mold comprises blank cavities and pipe extrusion channels which communicate with each other; the device further comprises a pipe core, a supporting assembly and an extrusion device for extruding materials from the blank cavities into the pipe extrusion channels; the supporting assembly is arranged in the blank cavities; the extrusion device is arranged on the supporting assembly in a reciprocating sliding manner; and the pipe core is arranged in the pipe extrusion channels. The device is simple in structure, the operation cost is low, and power provided by a hydraulic press can be used, so that the extrusion device can provide the relatively high extrusion pressure.

The invention discloses a granulation die head device for increasing extrusion pressure. The granulation die head device comprises a transversely-arranged first pipe body, a second pipe body is arranged at the top of the first pipe body in a communicating mode, one end of the first pipe body is sealed, a plurality of discharging holes are formed in the sealed end, an end cover is arranged at the other end of the first pipe body, and a through hole is formed in the middle of the end cover; a piston block is slidably arranged in the first pipe body, a pressing rod is arranged in the middle of the end, away from the discharging hole, of the piston block, and the piston block is matched with the inner wall of the first pipe body; the end, away from the piston block, of the pressing rod is connected with a pressing plate, a hydraulic cylinder is fixedly installed at the bottom of the first pipe body, and the end of a piston rod of the hydraulic cylinder is fixedly connected with the pressing plate; and a ball valve is installed on the second pipe body, a pushing piece is installed on the pressing plate, and the transversely-moving pressing plate drives the ball valve to be opened or closed through the pushing piece. The granulation die head device is novel in structure, materials retained in the die head can be effectively reduced before batch production and machining are stopped, excessive material solidification is prevented, the preheating time of subsequent machining is shortened, consumption is reduced, and efficiency is improved.

The invention provides a compact type control system for a vacuum brick extruding machine. The signal output end of a data collecting module and the signal output end of a manual input module are connected with the signal input end of a central process and control module respectively. The central process and control module outputs a control signal through the signal output end after being processed to control a rotating speed control unit of a motor in the brick extruding machine in an executing module, a rotating speed control unit of a motor of a multi-hopper soil taking machine, a frequency converter of a brick raw material warehouse type feeding machine, a frequency changer of a motor of a double-shaft mixer and a frequency changer of an automatic water-adding motor to conduct corresponding rotating speed adjustment. According to the compact type control system for the vacuum brick extruding machine, automatic control is achieved by designing a computer expert software, a function of automatically improving equipment running rate, reminding, warning and recording is possessed, at the same time, remote control is conducted through the network, the purpose of improving equipment running rate and lowering the consumption is achieved, the quality of a clay lath is comparatively high, the quality of a semi-finished product of a hollow brick is guaranteed, the rejection rate is lowered in the drying and sintering process, and the yield and the quality are improved.

The invention discloses an internal exhaust type parallel counter-rotating multi-screw extruder and relates to extrusion molding equipment using at least two screw rods which are not meshed with each other. The internal exhaust type parallel counter-rotating multi-screw extruder has the advantages of high extrusion pressure, enhanced plasticizing capacity, reduced energy consumption, remarkable energy saving effect, good feeding performance, exhaust performance and material overflowing prevention performance, and convenience in screw machining, and is suitable for various plastic and rubber machining. The internal exhaust type parallel counter-rotating multi-screw extruder is structurally characterized in that the left end of a main screw rod has a hollow structure, the built-in left end is fixed on an inner screw rod on an end cover, the direction of threads on the inner screw rod is opposite to that of threads on the main screw rod, the right end of the main screw rod is internally provided with an exhaust channel which is communicated with an exhaust channel in the inner screw rod, threads on the main screw rod corresponding to an auxiliary screw rod are single threads, other threads on the main screw rod are double threads, a first through hole connected with the exhaust channel is arranged in the main screw rod between two screw arrises of the double threads, a plurality of second through holes are arranged between the two screw arrises of the double threads on the main screw rod outside the inner screw rod, the end cover is provided with a melt outlet communicated with a cavity between the main screw rod and the inner screw rod, and the center of the end cover is provided with an exhaust port connected with the exhaust channel.

The invention relates to the technical field of injection molding machine design, in particular to an injection joint for an injection molding machine that adopts a pressure supply design, including an injection tube, the injection tube includes a heating tube that is fixed and installed with a feeder through bolts, and the left side of the heating tube passes through The bolts are installed with a pressure supply pipe, the left side of the pressure supply pipe is welded and installed with a butt joint, and a telescopic tube is inserted into the butt joint. The beneficial effect is: the device can provide higher extrusion pressure by driving the push rod and the push plate, so that the material can be more fully filled into the mold, effectively avoiding product defects caused by insufficient extrusion pressure The problem is that the device is easy to use, can adapt to molds of different sizes, and only needs to set the extrusion pressure and extrusion cycle in the controller to complete the injection extrusion automatically, which effectively saves manpower and has a lot of advantages. High practical value.

The invention discloses an integral structure of a molded-coal vacuum hard-plastic extruding machine. The integral structure comprises an upper machine part, a lower machine part and a supporting part. The upper machine part comprises a first motor, a first speed reducer, a hopper, an agitating tank, a screw propelling auger and a discharging box, wherein the first motor, the first speed reducer, the hopper, the agitating tank, the screw propelling auger and the discharging box are sequentially arranged from the right end to the left end. The lower machine part comprises a second motor, a second speed reducer, a connecting box, a vacuum chamber, a vacuumizing device, an extruding auger and a mold outlet device, wherein the second motor, the second speed reducer, the connecting box, the vacuum chamber, the vacuumizing device, the extruding auger and the mold outlet device are sequentially arranged from the front end to the back end. The vacuum chamber of the lower machine part is communicated with the discharging box of the upper machine part through the connecting box. Vacuumizing operation is carried out on the vacuum chamber through the vacuumizing device. The integral structure of the molded-coal vacuum hard-plastic extruding machine has the advantages that molding products are not prone to damage, the extruding pressure is large, the molding water content is low, drying is easy, and fire resistance is good; molded coal in multiple shapes can be produced, multiple requirements of users can be met, and production efficiency is high.