7results about How to "Reduce shrinkage" patented technology

This invention belongs to the field of building materials technology, specifically relating to a silica-alumina material, its preparation method, and its application. The silica-alumina material comprises 10-65 parts by weight of red mud, 20-60 parts by weight of slag powder, 0-20 parts by weight of silicate cement clinker, 0.1-8 parts by weight of an activator, and 5-15 parts by weight of an expanding agent; wherein, based on the mass of the expanding agent, the expanding agent comprises 0-60 wt% aluminum sulfate, 0-70 wt% carbide slag, 0-70 wt% tricalcium aluminate, 0-60 wt% calcium sulfoaluminate, and 0-60 wt% gypsum, and the content of at least two components in the expanding agent is not zero. The silica-alumina material of this invention, with its specific components and contents, can achieve both high strength and low shrinkage. When used in cement mortar, it can enhance the density of the cement and prevent cracking, enabling the material to be used for a long time.

The utility model discloses an elastic power-assisted fingerstall for assisting typewriting. The elastic power-assisted fingerstall comprises a near knuckle sleeve and a wrist sleeve, wherein the near knuckle sleeve is sleeved on a near knuckle of an index finger, and the wrist sleeve is sleeved on a wrist; the near knuckle sleeve is connected with the wrist sleeve through an elastic strip, and the elastic strip is distributed along the back of the index finger and the back of the palm; and the elastic strip is provided with a tension degree adjusting mechanism. After the elastic assisting fingerstall is worn, the tension degree of the elastic strip is adjusted through the tension degree adjusting mechanism, so that the elastic strip is in an elastic stretching state in a ready typing state. When the keyboard or the mouse is knocked and the index finger is lifted, the elastic strip elastically contracts along the finger back to provide backward and upward pulling assisting force; the working mode that the index finger completely depends on active contraction is changed into the working mode that active contraction and passive contraction are mixed, the index finger extensor contraction strength is reduced through assistance, the tension degree of the index finger extensor and auxiliary muscle groups of the index finger extensor is effectively relieved, and therefore the morbidity probability of chronic strain is reduced.

The utility model discloses a bushing outer pipe machining device, and relates to the technical field of bushing outer pipe machining, the bushing outer pipe machining device comprises a punching machine body, a workbench located on the punching machine body, a sliding block arranged below the punching machine body, and a first fixing base, a second fixing base and a third fixing base which are arranged above the workbench and used for containing to-be-machined pipe fittings; fixing columns attached to the inner side wall of a to-be-machined pipe fitting are arranged above the three fixing bases, a first punching base, a second punching base and a third punching base which correspond to the first fixing base, the second fixing base and the third fixing base respectively are arranged below the sliding block, a forming groove is formed below the first punching base, and a flattening punch is arranged below the second punching base. A cutting punch is arranged below the third punching base. The first stamping seat is used for stamping and necking a pipe fitting, the second stamping seat is used for flattening the necking, then the pipe fitting is placed on the third fixing seat, the cutting punch is used for blanking the necking, the sliding block drives the three stamping seats to press downwards, machining of different working procedures of the lining outer pipe can be completed, and the machining efficiency of the lining outer pipe is improved.

The utility model discloses a kind of pinhole plate and template machine, pinhole plate includes pinhole plate body, first boss, first through hole and pad high block, pinhole plate body is used to connect with the needle plate of template machine;First boss is protruded to the side of first plate body away from needle plate along first direction, first boss is used to support cloth located in the side of first boss away from pinhole plate body;First through hole is through pinhole plate body and first boss along first direction, first through hole is used to be provided with the needle of template machine, to carry out sewing to the sewing position to be located in first through hole in cloth;Pad high block is protruded to the side of first boss away from pinhole plate body along first direction, pad high block is used to support cloth after needle sewing, and move to the side of pad high block away from first boss;Wherein, when a previous sewing position to be moved to the side of pad high block away from first boss after needle sewing, a subsequent sewing position is moved into first through hole;The flatness of cloth is improved.

The invention belongs to the technical field of fruit and vegetable drying, and particularly relates to an apple slice drying method based on a plasma technology. The drying method comprises the following steps: performing plasma pretreatment on fresh apple slices to obtain pretreated apple slices; the time of the plasma pretreatment is 20 to 180 seconds; and performing hot air drying on the pretreated apple slices to obtain dried apple slices. According to the method, the fresh apple slices are firstly subjected to plasma pretreatment and then are dried, the etching effect of plasma can promote internal moisture of the apple slices to migrate to the surfaces, moisture evaporation is accelerated, and the drying time of the apple slices is shortened. According to the method, the drying efficiency of the apple slices can be remarkably improved, the energy consumption is reduced, the color, the shape, the rehydration capacity and the sensory quality of the dried apple slices are improved, the technical problems that in the prior art, the drying efficiency of the apple slices is low, and the product quality is reduced are solved, and a new technical approach is provided for high-value processing and utilization of the apple slices.

The utility model relates to the technical field of air conditioners, in particular to an indoor unit and an air conditioning system, and aims to solve the problem that an existing indoor unit easily generates abnormal sound due to thermal expansion and cold contraction during startup and shutdown. In order to achieve the purpose, the indoor unit comprises a plurality of air conditioner parts which are connected with one another, and the air conditioner parts are provided with matching surfaces so as to be matched with other air conditioner parts; and in two adjacent matching surfaces, one matching surface is provided with a first micro bulge, and the other matching surface is provided with a second micro bulge. The first micro-protrusions and the second micro-protrusions can absorb a part of vibration energy in the vibration process, the vibration amplitude is reduced, the first micro-protrusions and the second micro-protrusions can transversely expand and contract in the thermal expansion and cold contraction process, the expansion amount and the contraction amount towards the air conditioner components are reduced, the displacement amount between the adjacent air conditioner components is reduced, and the air conditioner components are prevented from being damaged. And noise caused by thermal expansion and cold contraction is reduced. And the stress concentration phenomenon of the geometric edge area can be reduced, the sound of thermal expansion and cold contraction is reduced, and the user experience is improved.

The utility model relates to the technical field of air conditioners, in particular to an indoor unit and an air conditioning system, and aims to solve the problem that an existing indoor unit easily generates abnormal sound due to thermal expansion and cold contraction during startup and shutdown. In order to achieve the purpose, the indoor unit comprises a plurality of air conditioner parts which are connected with one another, and the air conditioner parts are provided with matching surfaces so as to be matched with other air conditioner parts; one of two adjacent matching surfaces is provided with a first micro bulge, and the other one is provided with a second micro bulge; the first micro bulges comprise a plurality of convex strips and / or a plurality of convex points which are sequentially arranged on the matching surface; the second micro-protrusions comprise a plurality of protruding points arranged on the matching face. In the thermal expansion and cold contraction process, the first micro protrusions and the second micro protrusions can transversely expand and contract, the expansion amount and the contraction amount of the air conditioner components are reduced, the displacement amount between the adjacent air conditioner components is reduced, and noise caused by thermal expansion and cold contraction is reduced; and the stress concentration phenomenon of a geometric edge area can be reduced, and contact slippage between air conditioner components is improved.