7results about How to "Same density" patented technology

A Lego hollow brick forming machine is characterized in that it includes a base platform, a hopper, a feeding conveyor belt, an upper crossbeam, a movable crossbeam I, a movable crossbeam II, a machine column, a main hydraulic cylinder, an upper punch, a lower punch, a groove, a hydraulic cylinder IV, a core, a metal sheet, and a stacking table. The invention uses a novel three-stage pressing method to greatly improve the stability of high-hollow Lego blocks, so that the height error of the produced blocks is small. At the same time, under the objective condition that the error of the feeding amount in the block volume ratio stage is relatively high (±(2÷4)% of the average mass of the blocks), the pressure in the final pressing stage can be adjusted and other quality parameters of the blocks, such as firmness and frost resistance, can be guaranteed.

The invention relates to the technical field of spectral analysis, in particular to a spectral confocal measurement structure which comprises a light source, a Y-shaped optical fiber coupler, a dispersion lens and a spectrograph. Wherein the Y-type optical fiber coupler is provided with a common end, a first bifurcated end and a second bifurcated end, the first bifurcated end is connected with the light source, the second bifurcated end is connected with the spectrometer, and the common end is connected with the dispersion lens; the spectrometer comprises a collimating lens, a longitudinal dispersion grating, a cylindrical lens, a beam splitter prism, a first multi-frequency grating, a second multi-frequency grating and an area array detector, the collimating lens, the beam splitter prism and the second multi-frequency grating are sequentially arranged in the first direction, and the first multi-frequency grating, the beam splitter prism and the longitudinal dispersion grating are sequentially arranged in the third direction. And the cylindrical lens and the area array detector are sequentially arranged on a light path on one side, far away from the beam splitter prism, of the longitudinal dispersion grating. According to the invention, high luminous flux, high resolution and broadband measurement can be realized.

The present invention relates to the field of atomic sensing technology, and in particular to a flat-top beam two-dimensional magneto-optical trap, which is used to solve the problem that the light intensity distribution of the elliptical light spot in the major and minor axis directions of the existing two-dimensional magneto-optical trap is Gaussian, resulting in the linear cold atomic beam having large divergence angles at both ends, uneven density distribution in the longitudinal direction (along the beam direction), and wide atomic velocity distribution. The flat-top beam two-dimensional magneto-optical trap includes an ultra-high vacuum cavity, a cooling and trapping laser optical path system, a first group of anti-Helmholtz coil components, and a second group of anti-Helmholtz coil components. The present invention uses a non-spherical optical element in the cooling and trapping laser optical path system, so that the cooling and trapping laser beams are shaped into uniform laser beams with rectangular cross sections, and the light polarization states are consistent on the beam cross sections.

The invention discloses a fully automatic test model soil hammering device, comprising a base, a vertical pole and a handle, wherein the lower end of the vertical pole is fixed at the center of the base, the handle is fixed at the upper end of the vertical pole, a spiral sleeve rotatably connected to the vertical pole is sleeved on the vertical pole, a spiral groove and a vertical groove are arranged on the outer surface of the spiral sleeve, the two ends of the vertical groove and the spiral groove are connected respectively, the upper end of the spiral sleeve is connected to a motor through a transmission mechanism, the motor is provided with a control system, and the control system, the motor and the transmission mechanism are all installed on the handle; a C-type sleeve is sleeved on the spiral sleeve, the lower end of the C-type sleeve is fixed on the base, a heavy hammer is sleeved on the C-type sleeve, a guide block is arranged in the sleeve hole of the heavy hammer, the guide block is connected to the heavy hammer through a pin shaft, the guide block is rotatably connected to the pin shaft, and the pin shaft is fixed to the heavy hammer; the guide block passes through the opening of the C-type sleeve and is slidably assembled in the vertical groove and the spiral groove. The invention can accurately and quickly complete the production of model soil and can reduce labor intensity.

The present invention discloses a four-piece self-sealing screw head assembly, which includes a screw head, a check ring 1, a check ring 2 and a meson, wherein the check ring 1, the check ring 2 and the meson are sequentially sleeved on the screw head, the front end of the screw head is an arrow-shaped wing, the check ring 1 is a circular ring, and has two grooves on the circular ring, the arrow-shaped wings at the front end of the screw head are respectively sleeved in the two grooves of the check ring 1, the bottom edges of the two grooves of the check ring 1 both include a flat part and an inclined part, the check ring 2 is installed at the rear end of the check ring 1, the middle part of the screw head has a boss, and the meson is installed behind the boss. The four-piece self-sealing screw head assembly of the present invention can cooperate with the function of the injection molding machine to automatically seal the glue, thereby achieving the purpose of reducing the backflow of molten plastic, and then making the weight and density of the plastic injected into the mold the same, the size and weight of the precision injection molded product are stable, and the quality of the precision plastic products is improved.

The application relates to the technical field of fireproof materials, in particular to a flame-retardant ABS composition and a preparation method thereof; the flame-retardant ABS composition comprises the following components in parts by weight: ABS particles 1000-1400 parts, polysiloxane 350-450 parts, dimethyl silicone oil 100-200 parts, a flame retardant 300-600 parts, inorganic fillers 100-300 parts, a crosslinking agent 5-40 parts, a coupling agent 2-20 parts, a catalyst 0.5-2 parts and an intumescent agent 1-2 parts; the ABS particles in the composition serve as the only hard aggregate, have high size consistency and the same density, and are not prone to sedimentation; the ABS particles are light and rigid, are not prone to brittle fracture after being extruded, and have flame-retardant properties; when being pushed to an ignition point, the ABS particles can cover the fire source together with the gel, so that the purpose of blocking combustion is achieved.

The present application relates to a polishing pad pouring mold, a polishing pad processing method and a polishing pad, wherein the polishing pad pouring mold comprises two pouring pieces, the two sides and the bottom side of each pouring piece are provided with a bonding strip, the bonding strips of the two pouring pieces are connected in opposite directions, so that an inner polishing pad forming groove is formed between the two pouring pieces, the top edge of each pouring piece is provided with a first inclined surface as a pouring point, and the polishing pad processing material can slide along the pouring point to fill the inner polishing pad forming groove; the processing method comprises the following steps: preparing a polishing pad processing material; heating the polishing pad pouring mold to 50-70 DEG C; pouring the polishing pad processing material into the inner polishing pad forming groove of the polishing pad pouring mold; and vulcanizing the polishing pad processing material in the polishing pad pouring mold to form a solid. Compared with the prior art, the present application can improve the density and the uniformity of the microsphere expansion ratio of the formed polyurethane cake body, and effectively improve the yield.