摘要:
An injection molding machine is proposed, especially for injection stamping of large-area plastic moldings, that has at least a first injection mold which has two mold halves and which forms a first cavity with a first projected area, and a second injection which has two mold halves and which forms a second cavity with a second projected area, one mold half of each of the two injection molds being fixed on a common carrier unit. A support means for the two injection molds acts in the opening direction. In order to limit the force acting on the respective cavity, the support means, depending on the respective projected area of the respective cavity, partially take up the clamping force so that a holding pressure force acting on the material which has been injected into the respective cavity is set.
摘要:
Semiconductor technology requires the use of object holders, which are capable of holding wafers securely, also during rotation. In order to save time and expense, such holders should be suitable for integration directly into a processing facility, wherever possible. According to the invention it is proposed to provide centrally mounted holders which comprise support surfaces for the wafer and pivotable gripper fingers, in which the gripper fingers are pretensioned by means of at least one pretension element in the holding position and are actuated through one opening mechanism, in which at least one opening mechanism and at least one pretension element are integrated in the central clamping arm fixture and/or in the clamping arms.
摘要:
A device for actuating the control valve (14) of a hydraulic power steering system for automotive vehicles, the rotary motion of a steering wheel being transmitted by means of a steering shaft (2) and the steering torque being transmitted by a relative rotation between the steering shaft (2) and a pinion shaft (4), and wherein the control valve (14) is a linear slide valve. A sleeve (6) embracing the steering shaft (2)and the pinion shaft (4) converts the relative rotation between the two shafts into an axial displacement axially and helically extending coulisse-type guides (7, 8), angularly disposed to one another, within which pins (9, 10), rigidly coupled to the steering shaft (2) and the pinion shaft (4), are received.
摘要:
An exhaust gas aftertreatment device, including a bent exhaust pipe, a mixing pipe having a closed end at the exhaust pipe bend and a bell-shaped widened portion in at least partial contact with the exhaust pipe at its opposite end, and a nozzle connected to a receptacle in the mixing pipe closed end for injecting an additive into the exhaust gases, with a mixing one in the exhaust pipe between the urea nozzle and the exhaust pipe outlet in which the exhaust gases flow around the mixing pipe symmetrically and form a double eddy in the mixing pipe.
摘要:
The invention relates to a method for mixing an exhaust gas flow with a fluid in an exhaust gas pipe 40 of an exhaust gas system 4, in which the fluid is injected by means of an injection device 5 into the exhaust gas pipe 40. The exhaust gas flow is guided in the exhaust gas pipe 40 in the area of the injection device 5 in a direction of flow S parallel to the exhaust gas pipe 40. The fluid is injected directly onto a deflection element 6 which is arranged in the exhaust gas pipe 40 in a central direction of injection E which deviates from the direction of flow S by an angle se, wherein by means of at least one sheet metal part 60 which is provided on the deflection element 6 and which is raised at least partially at an angle sv with reference to the direction of flow S, the exhaust gas flow is diverted with reference to the direction of flow S from its direction of flow S into a central direction of distribution V. Before and after it impacts the deflection element 6, the fluid is carried along at least partially by the diverted part of the exhaust gas flow into the direction of distribution V and is diverted into the direction of distribution V by the raised sheet metal part 60.
摘要:
In a motor vehicle with a roof opening (12) located in a fixed roof surface (10) and a cover (13) for closing the roof opening, the cover has an at least partially transparent pane (14) and a frame which is connected to the pane and which extends over at least one part of the edge of the pane. The pane (14) is a plastic pane and the frame is formed by in situ foaming (20) of a foam material onto the periphery of the pane, the shape of the pane, in at least one partial area of a connecting region between the pane and the peripheral foam, is configured such that a permanent mechanical, positive interlocking connection is created between the pane and the peripheral foam.
摘要:
The invention relates to a method for preparing metallic workpieces for cold forming by contacting the metallic surfaces thereof with an aqueous acid phosphating solution so as to embody at least one phosphate coating and then coating the phosphate-coated surfaces with at least one lubricant in order to embody at least one lubricant layer. According to the inventive method, the phosphating solution essentially contains only calcium, magnesium, or/and manganese as cations that are selected among cations of main group 2 and subgroups 1, 2, and 5 to 8 of the periodic table of chemical elements in addition to phosphate. Furthermore, an alkaline earth metal-containing phosphating solution is free from fluoride and complex fluoride while the phosphating process is carried out electrolytically. The invention further relates to a metallic workpiece that is coated accordingly as well as the use of workpieces coated in said manner.
摘要:
An injection molding machine is proposed, especially for injection stamping of large-area plastic moldings, comprising at least a first injection mold (13) which has two mold halves (15, 16) and which forms a first cavity (17) with a first projected area, and a second injection mold (14) which has two mold halves (18, 19) and which forms a second cavity (20) with a second projected area, one mold half (15, 18) of the two injection molds (13, 14) respectively being fixed on a common carrier unit (21) and for the two injection molds (13, 14) there being support means (22A to 25A; 22B to 25B) acting in the opening direction. In order to limit the force acting on the respective cavity, the support means (22A to 25A; 22B to 25B) depending on the respective projected area of the respective cavity (17, 20) partially take up the clamping force so that a holding pressure force acting on the material which has been injected into the respective cavity (17, 20) is set.
摘要:
In view of the miniaturization of semiconductor components, the prevention of particles and other defects on the wafer surface during production is of great importance. The inspection should proceed as process-oriented as possible. For this purpose, devices are needed which on the one hand, are of very compact construction, while on the other hand, they still are equipped with measuring systems meeting the highest requirements.The device according to the invention for measuring surface defects, comprising a sample holder, a rotation drive for the sample holder, wherein the rotational axis runs perpendicular to the sample surface to be measured, an optical measuring system (10) for measuring scattered light, as well as at least one linear drive (23) for the measuring system, wherein the rotational direction is radial to the rotational axis of the sample holder, is capable of scanning the entire sample surface (16). By moving not only the sample, but also the measuring system, the need for space as a whole is reduced and the total device can be constructed with a more compact design.
摘要:
A pipette for the handling of a syringe. The pipette has jaw chucks which are adjustably arranged with respect to the plunger receptacle, being pivotably mounted on a plunger-gripping device. The syringe is insertable with opened jaw chucks with the plunger head only partially contacting the jaw chucks. The jaw chucks are laterally engageable on the plunger head upon insertion of the syringe. The engaging movement of the jaw chucks on the plunger head is regulated according to the invention so that the engaging movement has a substantially tangential component with respect to the surface of the plunger head. As a result, a desired and form-locking connection to the plunger head of the syringe results that requires a small amount of force.