207 results about "Undercut" patented technology

The invention belongs to but not limited to the technical field of welding, and discloses a power modulation galvanometer laser welding method and device for a zirconium alloy fuel rod. A laser beam adopts a circular scanning track for welding along a circumferential weld, the power of 36 phase points in the circular scanning track is adjusted, a gradient power mode that the middle is high and the two sides are low is adopted for welding, a molten pool is stirred through the rotating laser beam, flowing of the molten pool is aggravated, gas escape is promoted, and meanwhile in the power modulation mode, the welding speed is increased. The surface energy distribution of the whole molten pool is more uniform, the power of the edge position of the molten pool is reduced, the weld seam undercut degree is reduced, and weld seam surface forming is more uniform. Three welding production procedures are reduced into two welding production procedures, meanwhile, the rotating speed during fuel rod welding is increased, the welding procedures are optimized, and the welding efficiency is improved; in addition, the problem that oxidation color beside an end plug welding circumferential weld is heavy is solved; and the welding seam air hole defect is improved, and the welding quality is improved.

A fastening arrangement for connecting a façade panel and a panel holder is provided. The façade panel is a panel with a homogeneous structure; with a front side, a material layer and a rear side. A keyhole-shaped groove is provided on the rear side of the facade panel having a widened insertion opening and a retaining area with an undercut in the material layer. The mechanical connection between the facade panel and the panel holder is a riveted connection using a rivet with a mushroom-shaped head inserted through the insertion opening and into the undercut of the retaining area. The panel holder is pushed onto a free end of the rivet shank that extends out via a through-opening so that the panel holder rests on the cover panel. The rivet shank free end is then formed by a rivet setting tool to create a positive fit between the composite panel and the panel holder.

The present invention is a steel continuous pipe downhole cable crossing bypass short section, comprising an outer tube, wherein the outer tube has a central channel, an eccentric channel and an oblique channel. An upper rosette and a lower rosette are arranged in the central channel, and both the upper rosette and the lower rosette have a central hole through which the cable can pass, and a plurality of oil holes arranged around the central hole. A slip connector is connected between the upper rosette and the lower rosette, and the inner diameter of the slip connector is arranged opposite to the central hole and can allow the cable to pass through. The slip connector has a slip that can contract radially and has teeth on the inner wall, and the slip is arranged in a contracted state and the teeth can bite the cable. The present invention can simultaneously meet the functions of fixing, sealing and crossing bypass of downhole cables, and can ensure the flow path, and has a simple structure and low cost.

The invention relates to a connector for two workpieces, comprising two fittings which each have a mounting face for a workpiece and an opposite connecting face, on which they can be hooked into one another in a hooking direction extending in parallel with the connecting face. Each fitting comprises, on its connecting face, a shoulder which extends transversely to the hooking direction over its entire width and comprises an undercut, which leaves a ridge on the shoulder. The end face of each fitting remote from the shoulder and adjacent to the connecting face has a lip adjacent to the connecting face and extending over its entire width transversely to the hooking direction. The lip of each fitting engages in the undercut in the respective other fitting in a first position of the fittings in which they are hooked into one another.

The invention relates to the technical field of clamps, in particular to an industrial robot welding clamp device which comprises two supporting seats, rotating seats are rotatably mounted on the inner walls of the top ends of the two supporting seats, a welding supporting plate is jointly and fixedly mounted on the inner sides of the two rotating seats, and a cavity is formed in the top end of one supporting seat. According to the fixing clamp, a to-be-welded part can be clamped, the friction between the to-be-welded part and the fixing clamp can be improved through a rubber material, the stability of the to-be-welded part in the clamping process can be improved, the to-be-welded part in an irregular shape can be stably clamped to the inner side of an anti-sliding block through arrangement of a clamping groove, and the applicability of the fixing clamp can be improved; and meanwhile, an anti-skid block on the inner side of the fixing clamp can be cooled, a welding part in the welding process is further cooled, the situation that the fluidity of molten metal of the welding part is enhanced due to the fact that the temperature is too high in the welding process can be avoided, and the defects of too wide welding seams, uneven surfaces, undercuts and the like can be avoided.

The invention relates to a device, in particular an inclined ejector (1), for demolding a cast component (2) with an undercut from a casting mold for a casting process or an injection molding process with an ejector, comprising:an ejector head (16) with a profile which is complementary to the cast component (2) with the undercut and is mounted in a recess (8) so as to be displaceable between a casting position and an ejection position,an ejector base (5) that moves in the translational direction;a link chain (12), which mechanically connects the ejector head (16) with the ejector base (5) in order to implement a force and movement deflection, wherein the link chain (12) has a plurality of chain segments (121) which engage in one another in the longitudinal direction, have low play / backlash with respect to pull and push in the longitudinal direction and permit tilting relative to one another in at least a first transverse direction.

The invention belongs to but not limited to the technical field of welding, and discloses a beam shaping laser seal welding method and system for an aluminum alloy target, which combines a power modulation technology on the basis of galvanometer laser mechanical swing and combines the advantages of a beam time shaping technology and a beam space shaping technology into a whole. And a novel beam shaping strategy of power modulation and galvanometer laser is realized. During beam shaping laser welding, a laser beam is welded by adopting a circular scanning track, power modulation is performed on 36 phase points in a circular scanning period, laser energy distribution is adjusted, and a corresponding energy field is matched for an aluminum alloy sealing welding joint; a welding seam formed by the aluminum alloy cladding pipe and the end plug is sealed in a beam shaping mode with the high middle and the two low sides, the maximum peak energy density of lasers on the two sides of the welding seam is reduced, the flowing stability of a molten pool is improved, and therefore welding seam undercuts are reduced, and welding seam surface forming is improved.

The invention relates to a method for producing a composite part for a vehicle, comprising at least one base element and at least one bearing element, the base element comprising at least one recess for at least partially receiving the bearing element, the method comprising: introducing the bearing element into the recess of the base element in an installation direction, wherein, during the introduction of the bearing element into the recess of the base element, the bearing element has an interference with respect to the recess; heating the bearing element and at least partially transferring thermal energy of the bearing element to the material of the base element; -displacing at least a portion of the material of the base element by means of the bearing element, at least one undercut being formed on the base element by displacing the material of the base element, the undercut preventing or substantially preventing a movement of the bearing element relative to the base element counter to the mounting direction; and cooling the base element and the bearing element. The invention also relates to a corresponding composite component and a vehicle.

To provide a welding parameter adjustment method that can adjust a welding parameter without requiring shape measurement using cameras or the like in order to suppress undercuts and humping beads.SOLUTION: A welding parameter adjustment method sets a welding table containing a welding parameter and the number of short circuits per unit time as an evaluation index and performs trial welding on a workpiece 200, measures a welding current at this time and calculates an evaluation score related to the evaluation index, estimates a value of the welding parameter on the basis of the evaluation score, repeatedly executes a series of processing from trial welding to estimation of the value of the welding parameter, and changes the value of the welding parameter on the basis of the estimation result of the value of the welding parameter at each starting point, when determining that additional trial welding of the workpiece 200 is no longer required, selects the welding parameter in a case where the evaluation score is highest, and updates the welding table.SELECTED DRAWING: Figure 4

A tool (100) for cold forming of splines on a pre-machined blank includes an annular shaped die holder (102) and an annular shaped die (104) concentrically fixed to the die holder (102). The die (104) includes splined profile matching profile of the splines to be formed on an inner circumference of the annular shaped die (104). The tool (100) is configured to concentrically locate the blank (300) over the die (104) such that when the blank is forced against the die (104), the splined profile of the die (104) deforms the spline portion (304) of the blank (300) to generate the splines. The blank includes an undercut located between a gear portion (302) and a spline portion (304) of the blank to accommodate material flow due to deformation of the spline portion (304) of the blank (300) during generation of the splines.

The utility model discloses an altimeter testing fixture for detecting the dimension of an internal thread tool withdrawal groove, which relates to the technical field of tool withdrawal groove dimension measurement and comprises a base assembly, and a measuring assembly is arranged at the top of the base assembly. According to the utility model, the height block and the thread go gauge are respectively arranged at two sides of the top end of the bottom plate, and the height block and the thread go gauge have the same height, so that during detection, a measured product is sleeved at the top end of the height block, and then the slide block slides, so that the bottom end contact of the altimeter is located at the top of the height block; the altimeter is pulled downwards until the contact of the altimeter is in contact with the top of the product, the altimeter is reset, then the thread of the product is rotated to the top end of the thread go gauge, the altimeter is moved to the top of the thread go gauge, the contact of the altimeter is pulled again to be in contact with the top of the product, and the read number is the measurement result. The measurement efficiency is high, the measurement is accurate, and the error is small.

The invention discloses a corner crack arrest slot undercut to reduce grain damage. A die carrier for accommodating a plurality of circuit protection devices is disclosed. In some embodiments, a die carrier may include a die body and a recess in the die body, where the recess is operable to receive a die of a circuit protection device. The recess may include a central region defined by a set of sidewalls and a plurality of corner regions extending from the central region, each of the corner regions defined by a first curved wall, a second curved wall connected to the first curved wall, and a third curved wall connected to the second curved wall, wherein a first center of curvature of the first curved wall and a second center of curvature of the second curved wall are at different positions.

The invention relates to the technical field of foundation engineering, in particular to a sunken post-tensioning anti-floating anchor rod fabricated anchoring joint construction method which comprises the following steps: carrying out an anchor rod uplift bearing capacity test; constructing a cushion layer and manufacturing an anchor rod, wherein the anchor rod comprises a steel strand; an anchor rod construction point is positioned on the cushion layer; drilling and cleaning an anchor hole; lowering the anchor rod; performing primary normal-pressure grouting and secondary high-pressure grouting; maintaining the anchor rod; constructing a waterproof layer; binding reinforcing steel bars and installing a sealing anchor base; pouring structural bottom plate concrete; tensioning and locking the anchor rod; according to the construction method, it can be guaranteed that the site of the structural bottom plate is flat, operation of constructors and transportation of mechanical equipment are facilitated, the effect of protecting anchoring joints of the anchor rods is achieved, and the damage risk of the anchoring joints is reduced; compared with a traditional convex type or concave type anchoring node, the bottom plate can be reduced by a certain thickness, waterproof construction operation is simpler and more convenient, the labor material cost can be greatly reduced, the construction difficulty can be lowered, the self weight of the bottom plate is reduced, and the effect of shortening the construction period is achieved.

The present invention relates to the field of movable model parts for injection molding, and specifically to a slider device for multi-directional undercut demoulding and a method for using the same. A slider device for multi-directional undercut demoulding comprises a fixed mold plate (1), a fixed mold insert (2) and a slider locking block (3), and is characterized in that it also comprises a movable mold plate (4), a movable mold insert (5), a slider (6), a slider insert (7), an inclined push rod (8), a square pin (9), an inclined push rod protection block (10), a square pin guide slider (11) and a slider pressure plate (12), wherein the movable mold insert (5) and the slider pressure plate (12) are respectively arranged in one of the positioning grooves and are both fixed with bolts, and the slider (6) and the slider insert (7) both slide in the guide groove. A method for using a slider device for multi-directional undercut demoulding is characterized in that the following steps are implemented in sequence: ① mold closing; ② mold opening. The present invention has a simple structure and smooth demoulding.

The present invention provides a coreless rotor motor with an encoder, comprising a stator and a rotor installed in the stator, and also comprising an encoder and an encoding disk; the rotor comprises a magnetic steel frame, magnets, a left pressure cover and a right pressure cover; a plurality of magnetic steel slots are circumferentially distributed on the left and right ends of the magnetic steel frame; a plurality of through holes are circumferentially distributed on the magnetic steel frame; the through holes comprise an insertion portion through hole and a positioning portion through hole connected to one side of the insertion portion through hole; the magnets are inserted into the magnetic steel slots; a plurality of insertion rods are circumferentially distributed on the right side of the left pressure cover; an undercut is provided at the right end of the insertion rod; the insertion rod cooperates with the positioning portion through hole; the undercut can pass through the insertion portion through hole; an air avoidance groove for avoiding the undercut and a positioning protrusion cooperating with the insertion portion through hole are provided on the left side of the right pressure cover; the encoding disk is fixed on the right pressure cover; the encoder is fixed at the right end of the stator and connected to the encoding disk; the present invention is convenient to maintain, light in weight, small in size and has strong structural stability.

The utility model relates to a large-stroke back-off demolding mechanism, and relates to the technical field of molds, the large-stroke back-off demolding mechanism comprises an inclined ejection assembly, a straight ejection assembly and a lateral ejection assembly, the inclined ejection assembly and the straight ejection assembly abut against each other and are both in contact with a product, and a back-off of the product is located in the straight ejection assembly and is in contact with the lateral ejection assembly; the inclined ejection assembly is used for being separated from the product and the straight ejection assembly during ejection, and the lateral ejection assembly is used for ejecting the inverted buckle out of the straight ejection assembly. Through the synergistic effect of the inclined ejection assembly, the straight ejection assembly and the lateral ejection assembly, the demolding requirement of a large inverted buckle can be met; the inclined ejection assembly is separated from a product and the surface of a mold to provide a demolding space for ejection of an inverted buckle, the product and the surface of the mold can be prevented from being adhered, the clamping stagnation phenomenon is avoided, the demolding success rate is increased, the lateral ejection assembly can effectively eject the inverted buckle out of the mold, clamping stagnation caused by the inverted buckle is avoided, subsequent ejection and demolding of the product are facilitated, and the demolding efficiency is improved. And the product quality is improved.

The present invention discloses a secondary core-pulling mold structure, comprising a longitudinally arranged shovel base, the shovel base being sleeved and fitted with an A-plate, a slider seat 1, and a slider seat 2. The A-plate is provided with a groove 1, and the slider seat 1 and the slider seat 2 are both arranged inside the groove 1 and slideably fitted with the inner wall of the groove 1 in the transverse direction. The A-plate moves back and forth in the longitudinal direction relative to the shovel base; the slider seat 1 is inlaid with a pin; and the slider seat 2 is inlaid with a component. When the A-plate moves downward, the shovel base drives the slider seat 1 to perform a first movement to the right, and the slider seat 1 drives the slider seat 1 inlaid pin to move to the upper right, completing the demoulding of the product with the first inverted buckle; when the A-plate continues to move downward, the shovel base drives the slider seat 1 and the slider seat 2 to perform a second step of synchronous movement to the right, and drives the slider seat 1 inlaid pin to move to the right, completing the demoulding of the product with the second inverted buckle. This secondary core-pulling mold structure solves the problem of products with undercuts in two directions, ensuring smooth demoulding when the injection molded product has undercuts in two directions.

A rotary radial vane compressor comprising a cylindrical casing with slight undercut to make a contact sealing area with an off-center rotor. The rotor has one or more radial or offset vanes sliding within slots with a spring forcing it outward. The end of each vane cut in semi cylindrical shape to act as a sealed pivot for a sealing shoe mounted with crescent shaped profile. The sealing shoe casing side cut same as the casing radius and long enough to run over the undercut smoothly. The rotor has a cut space so that it houses the shoe fully in it when running over the undercut in the casing. The casing has intake and discharge ports with inner slot feed and exit extensions. During operation, as the rotor rotates, a cavity formed between the casing, the rotor, and the vane-shoe sets cyclically expands.

Disclosed are methods and apparatus related to micro-electro-mechanical systems (MEMS). A method for manufacturing a mechanical pillar in a micro-electro-mechanical (MEM) device may include: depositing a mask layer on a first side of a substrate; etching a first recess on the first side of the substrate; forming a pillar structure on the substrate wherein a first portion of the pillar structure is coupled to the first recess; etching a second recess at a second portion of the pillar structure; depositing an oxide layer on the column structure, the mask layer and the substrate; etching a horizontal surface of the oxide layer at the mask layer and the substrate; and releasing the mechanical pillar from the substrate, the mechanical pillar including a pillar structure, an oxide layer, and a mask layer.

A fastener including an elongated shaft extending between first and second shaft ends, with a tip provided at the first shaft end, and a thread region provided between the tip and the second shaft end; and a head with a drive region arranged at the second shaft end. The fastener also incudes a first annular undercut area in an underside surface of the head, where the first annular undercut area is configured and arranged to receive material that has flowed from a substrate during installation of the fastener into the substrate, and a second annular undercut area in the underside surface of the head, where the second annular undercut area is located radially outwardly of the first annular undercut area. Additionally, an annular sealing member is provided within the second annular undercut area, where the annular sealing member makes sealing contact with an upper surface of the substrate.

The invention relates to a coupling device (1) for connecting two elements (100, 200) to be connected, which two elements (100, 200) each have a groove (101, 201) with at least one undercut (102a, 102b), in particular a groove (101, 201) with at least one undercut (102a, 102b) on both sides and thus with at least two undercuts (102a, 102b). The coupling device (1) comprises a first clamping part (2) and a second clamping part (3). For each of the two clamping parts (2, 3), a longitudinal direction, a first direction perpendicular to the longitudinal direction, a second direction perpendicular to both the longitudinal direction and the first direction, a third direction opposite to the first direction, and a fourth direction opposite to the second direction are defined. The first clamping part (2) has a first effective surface (5), which first effective surface (5) is inclined relative to the longitudinal direction of the first clamping part (2). The second clamping part (3) has a first effective surface (6), which first effective surface (6) is inclined relative to the longitudinal direction of the second clamping part (3). The first clamping part (2) has a first protrusion arrangement (7), that extends in the first direction of the first clamping part (2), for engaging behind a first of the at least one undercut (102a) of the groove (101) in a first of the two elements (100) to be connected, and the second clamping part (3) has a first protrusion arrangement (8), that extends in the first direction of the second clamping part (3), for engaging behind a first of the at least one undercut of the groove (201) in a second of the two elements (200) to be connected. The coupling device (1) also comprises a tensioning device (4) for drawing the two clamping parts (2, 3) towards one another substantially along a longitudinal axis of the coupling device (1). When the coupling device (1) is assembled, the two clamping parts (2, 3) are each aligned with their longitudinal direction substantially along the longitudinal axis of the coupling device (1), while the first direction of the first clamping part (2) and the first direction of the second clamping part (3) are substantially parallel to one another, and the second direction of the first clamping part (2) and the second direction of the second clamping part (3) are substantially parallel to one another, and the two clamping parts (2, 3) are arranged one behind the other along the longitudinal axis with their first effective surfaces (5, 6) facing one another and can be drawn or are drawn towards one another along the longitudinal axis by the tensioning device (4). When the two clamping parts (2, 3) are drawn towards one another along the longitudinal axis by the tensioning device (4), the interaction of the first effective surfaces (5, 6) causes the first clamping part (2) and the second clamping part (3) to be pressed relative to one another in a direction transverse to the longitudinal axis of the coupling device (1), so that the first protrusion arrangement (7) arranged on the first clamping part (2) and the first protrusion arrangement (8) arranged on the second clamping part (3) are pressed towards one another. A normal vector perpendicular to the first effective surface (5) of the first clamping part (2) has both a component pointing in the first direction of the first clamping part (2) and a component pointing in the second direction of the first clamping part (2). A normal vector perpendicular to the first effective surface (6) of the second clamping part (3) has both a component pointing in the third direction of the second clamping part (3) and a component pointing in the fourth direction of the second clamping part (3).

An internally grounded filter feedthrough having a filter capacitor connected to a feedthrough is described. The feedthrough comprises an insulator having an active conductive pathway extending to its device and body fluid sides, and a ground conductive pathway extending part-way through the insulator thickness from the insulator device side. An undercut extending into the insulator sidewall communicates with the ground conductive pathway but does not extend to the insulator device or body fluid sides or to the active conductive pathway. A braze seals the insulator sidewall to the ferrule and extends into the undercut so that the braze contacts the ground conductive pathway. That way, the braze provides a ground electrical path from a capacitor ground via to the ground conductive pathway in the insulator connected to the braze sealed to the ferrule.

A method for producing a composite material of metal and plastic to form a plastic-metal hybrid component, in which macroscopic undercuts with microscopic undercuts having stochastically random roughness shapes and depths are introduced into the metal surface by means of short-pulse laser radiation to improve the adhesion between the metal surface and at least one plastic component, wherein the shapes and depths of the laser structuring of the metal surface are produced by changing the guidance and / or speed of the laser beam movement and simultaneously adjusting the power and / or the repetition rate of the short-pulse laser radiation, and the stochastically random roughness shapes are each at least partially filled with the at least one plastic component in an injection molding process such that the latter is gripped in the macroscopic and / or microscopic undercuts.wherein, following the roughening of the metal surface prior to the injection molding process of the at least one plastic component, at least the roughened surface of the metal is heated to a temperature which, in the processing range from room temperature to 100°C, is above the processing temperature of the at least one plastic component.

A push-pull plug may include a shielding spring which, viewed in the insertion direction, may have tab-like projections at the front, wherein a snap-ring may have tab-like recesses which correspond to the tab-like projections of the shielding spring and in which the projections of the shielding spring are arranged so that the tab-like projections of the shielding spring together with the tab-like projections of the snap-ring form a completely circumferential projection which comes to bear in the undercut in the panel-mounted socket. In the process, the shielding spring, which may be made of a metal material, loops through the shielding of the push-pull plug to the panel-mounted socket, wherein the shielding spring is directly or indirectly electrically connected to a shielding of a cable on which the push-pull plug is arranged.

The invention relates to a non-self-piercing metal fastening sleeve, which is adapted so as to form an opening reinforcement in a non-metal component and which comprises the following features: a hollow-cylindrical shaft, which is round in cross-section and has a first and a second axial end; a radial collar, which is located at the first axial end, is closed around the circumference of the shaft, protrudes in the radial direction from the shaft and has an integral sealing structure on a contact surface facing the shaft; and an axial wall portion of a wall extending around the circumference of the shaft, which is located at the second axial end of the shaft, tapers radially outwards and is radially outwardly expandable in order to form an axial undercut.

The invention relates to a coupling device (1) for connecting two elements (100, 200) to be connected, which two elements (100, 200) each have a groove (101, 201) with at least one undercut (102a, 102b), in particular a groove (101, 201) with at least one undercut (102a, 102b) on both sides and thus with at least two undercuts (102a, 102b). The coupling device (1) comprises a first clamping part (2) and a second clamping part (3). For each of the two clamping parts (2, 3), a longitudinal direction, a first direction perpendicular to the longitudinal direction, a second direction perpendicular to both the longitudinal direction and the first direction, a third direction opposite to the first direction, and a fourth direction opposite to the second direction are defined. The first clamping part (2) has a first effective surface (5), which first effective surface (5) is inclined relative to the longitudinal direction of the first clamping part (2). The second clamping part (3) has a first effective surface (6), which first effective surface (6) is inclined to the longitudinal direction of the second clamping part (3). The first clamping part (2) has a first protrusion arrangement (7), that extends in the first direction of the first clamping part (2), for engaging behind a first of the at least one undercut (102a) of the groove (101) in a first of the two elements (100) to be connected, and the second clamping part (3) has a first protrusion arrangement (8), that extends in the first direction of the second clamping part (3), for engaging behind a first of the at least one undercut of the groove (201) in a second of the two elements to be connected (200). The coupling device (1) also comprises a tensioning device (4) for drawing the two clamping parts (2, 3) towards one another substantially along a longitudinal axis of the coupling device (1). When the coupling device (1) is assembled, the two clamping parts (2, 3) are each aligned with their longitudinal direction substantially along the longitudinal axis of the coupling device (1), while the first direction of the first clamping part (2) and the first direction of the second clamping part (3) are aligned substantially parallel to one another, and the second direction of the first clamping part (2) and the second direction of the second clamping part (3) are aligned substantially parallel to one another, and the two clamping parts (2, 3) are each arranged one behind the other along the longitudinal axis with their first effective surfaces (5, 6) facing one another, and can be drawn or are drawn towards one another along the longitudinal axis by the tensioning device (4). When the two clamping parts (2, 3) are drawn towards one another along the longitudinal axis by the tensioning device (4), the interaction of the first effective surfaces (5, 6) causes the first clamping part (2) and the second clamping part (3) to be pressed relative to one another in a direction transverse to the longitudinal axis of the coupling device (1) so that the first protrusion arrangement (7) arranged on the first clamping part (2) and the first protrusion arrangement (8) arranged on the second clamping part (3) are pressed towards one another. A normal vector perpendicular to the first effective surface (5) of the first clamping part (2) has both a component pointing in the first direction of the first clamping part (2) and a component pointing in the second direction of the first clamping part (2). A normal vector perpendicular to the first effective surface (6) of the second clamping part (3) has both a component pointing in the third direction of the second clamping part (3) and a component pointing in the fourth direction of the second clamping part (3).

The utility model relates to the technical field of molds, and discloses a structure for releasing an inverted buckle by ejecting different movement positions, which comprises a mold bottom plate, a support plate, a mold template and four connecting columns, an ejector pin bottom plate is movably connected to the middle of the top end of the mold bottom plate, and an ejector pin panel is movably connected to the surface of the top end of the ejector pin bottom plate. Four limiting rods are fixedly connected to the bottom end of the mold template in a rectangular array mode, two ejection structures are movably connected to an inner cavity of the mold template at equal intervals, four connecting grooves are formed in the top end of the ejector pin bottom plate and the top end of the ejector pin panel in a rectangular array mode, and four guide columns are fixedly connected to the top end of the mold bottom plate in a rectangular array mode. Two ejector plate return springs are fixedly connected to the top end of the ejector panel at equal intervals, two model blocks are fixedly connected to the top end of the mold template at equal intervals, the straight ejector and the flat ejector synchronously move upwards, the straight ejector stops moving when reaching the position of the positioning block, and the flat ejector jacks one side of a product to make circular motion so as to release a reverse buckle of the product.

Method for the additive manufacturing of a workpiece (200) according to the fused deposition modeling method, wherein the workpiece (200) to be manufactured is built up layer by layer from a first plastic (K1), wherein during the build-up of the workpiece (200) the layers (210) with overlapping voids (211) are formed, so that channels (212) extending through the layers (210) are formed, wherein it is provided that the positions of the voids (211) are varied from layer (210) to layer (210) so that undercut offsets result between the superimposed voids (211), and / or that the shapes and / or sizes of the voids (211) are varied from layer (210) to layer (210) so that channels (212) with undercut channel contours result from the superimposed voids (211), characterized by the fact that the channels (212) formed with undercut channel geometries are injected with a second plastic (K2), thereby forming corresponding reinforcing elements (215) which extend through the relevant layers (210) and connect these layers (210) to each other and achieve a positive locking anchoring effect between the relevant layers (210), wherein the second plastic (K2) has a higher strength than the first plastic (K1), and wherein the first plastic (K1) and the second plastic (K2) are thermoplastics and the temperature of the second plastic (K2) during injection molding of the channels (212) is 5 K to 20 K above a melting temperature of the first plastic (K1), so that during injection molding the first plastic (K1) melts and a material-bonded connection can form.

The present invention provides a construction method of an underground vertical coal bunker and an underground vertical coal bunker excavation system, the construction method of the underground vertical coal bunker comprising: step S10, drilling a slag guide hole; step S20, excavating a starting foundation pit; step S30, installing an underground vertical coal bunker excavation system in the starting foundation pit; step S40, the underground vertical coal bunker excavation system excavates the underground vertical coal bunker from top to bottom; step S50, supporting the shaft wall of the underground vertical coal bunker; the underground vertical coal bunker excavation system comprises a tunneling machine and a vertical motion system, the tunneling machine is used for excavation, the tunneling machine is installed on the vertical motion system, and the vertical motion system can drive the tunneling machine to move vertically. Through the present invention, the technical problems of high labor intensity, long well construction period and low construction efficiency existing in the construction of underground coal bunkers are alleviated.