A kitchen sink deep drawing die is custom press tooling used to form flat stainless steel blanks into three-dimensional sink bowls through drawing, stretching and related forming operations. Suitable applications can include single-bowl sinks, double-bowl sinks, undermount sinks, top-mount sinks, drainboard designs and selected commercial wash basins.
Dongguan Changdong Tool & Die Co., Ltd. develops each kitchen sink deep drawing die according to the approved sink geometry, stainless steel specification, sheet thickness, bowl depth, corner radii, rim design, drainage features, production volume and destination press conditions.
Sink tooling should not be reduced to one deep-drawing operation. Depending on bowl depth and geometry, the complete process can require blank preparation, first draw, redraw or calibration, trimming, drain-hole piercing, faucet or overflow-hole operations, rim forming and final dimensional correction.
One-piece basin tooling requires stable material flow around the complete perimeter while controlling wall thinning and corner strain.
Two-bowl geometry creates competing material-flow zones around the center saddle and requires balanced forming between adjacent bowls.
Stainless drawing requires suitable tool finish, lubrication, contact geometry and working-component selection to reduce adhesive wear and surface marking.
Suitable sink tooling can be reviewed against Changdong press capacity according to die dimensions, drawing force and press conditions.
A kitchen sink deep drawing die is dedicated sheet-metal tooling used to draw a flat stainless blank into a sink basin while controlling material flow around the bowl walls, corners, rim and bottom. The process may use one major draw or multiple drawing and correction stages depending on bowl depth, corner radius and material behavior. The complete tooling package can also include trimming, drain-hole piercing, rim forming and other secondary press operations required to reach the approved sink geometry.
A stainless sink does not behave like a simple cylindrical cup. During forming, some areas of the blank flow inward through drawing while other regions stretch across the basin walls and corners.
This means the tool must balance two competing risks: too little restraint can allow flange or wall wrinkling, while too much restraint can increase thinning or cause the sheet to split around high-strain areas.
The broader relationship between draw depth, material ductility and geometry is explained in Deep Drawing Height and Material Ductility.
One of the first process decisions is whether the approved basin can be produced through one main drawing operation or whether the depth and geometry require additional redraw or calibration stages.
A deeper bowl does not automatically mean that another draw is required. Corner radius, blank size, material grade, sheet thickness, bowl aspect ratio and the amount of stretching all affect the forming route.
When the accumulated strain becomes too high, an additional drawing stage can reduce the deformation required in one operation. Some stainless sink processes may also require intermediate annealing because austenitic stainless sheet work-hardens during forming.
The correct process should therefore come from DFM and forming analysis rather than a fixed depth rule. Sink manufacturing literature confirms that additional forming and intermediate annealing may be required depending on basin dimensions and material behavior.
The same sheet thickness can form very different depths depending on basin width, corner radius, material properties and whether the process relies mainly on drawing or on stretching.
For a kitchen sink deep drawing die, drawing depth should therefore be reviewed together with the complete geometry and forming path. Quoting one universal “maximum sink depth” without the part drawing has limited engineering value.
Double-bowl sink geometry creates a more complex forming condition than two independent single bowls. The center saddle connects both basins, so material drawn toward one bowl also affects the neighboring bowl.
If material flow is not balanced, strain can concentrate around the center bridge or the intersection between the saddle and bowl walls. The result can be local thinning, cracking or asymmetric basin geometry.
Tooling can use local blank-holder control, drawbeads, radii and staged forming to balance the two sides. These features should be developed from the actual double-bowl design rather than copied from a single-bowl tool.
Blank-holder force controls how quickly material can feed from the flange area into the sink cavity. Insufficient restraint can create wrinkling, while excessive force can restrict material flow and increase wall thinning or fracture.
The required pressure is not constant across every sink geometry. Large corner radii, narrow side regions, drainboards and double-bowl transitions can need different local flow behavior.
For the dedicated engineering topic, see Blank Holder Force in Deep Drawing.
A stainless sink is both a formed structural product and a visible consumer surface. Adhesive wear between the stainless blank and die surface can produce scratches, pickup or galling that remain visible after forming.
For an kitchen sink deep drawing die, tool finish, contact pressure, lubrication, radii, working-component material and surface treatment should therefore be reviewed together.
Surface protection should not be treated only as a polishing operation after forming. The forming process itself should minimize the mechanism that creates the defect.
For broader stainless forming considerations, see Stainless Steel Metal Stamping.
Wrinkling often appears where compressive material accumulates around the outer flange or near the upper wall of a deep basin. The defect can be influenced by holder pressure, draw radius, blank shape and material flow.
A 2025 study on single deep drawing of SUS304 sink geometry specifically investigated wrinkling, cracking and springback, and found die fillet radius to be an important forming variable.
For general defect diagnosis, see Draw-Wall Wrinkling: Causes and Solutions.
A drainboard sink combines a deep basin with a relatively broad surrounding surface. The drainboard can contain shallow ribs, drainage features or local slopes while still needing acceptable overall flatness.
The basin drawing operation can introduce residual stress into the surrounding sheet. If final calibration is insufficient, the drainboard may show oil-canning or unwanted local deformation after unloading.
Forming sequence and restriking should therefore consider both the deep basin and the shallow drainboard geometry as one connected stamped component.
A sink bottom should not be evaluated only for flatness. The approved product may intentionally include a slight slope or formed drainage path toward the waste outlet.
After deep drawing, residual stress can cause the bottom to dish upward, become locally unstable or deviate from the intended drainage geometry.
A final calibration or restriking operation can be evaluated where required to control the approved basin-bottom profile before the drain opening is completed.
Drain holes, overflow openings and faucet-deck holes should be located relative to the final formed sink rather than only the flat blank.
Major drawing operations can shift material and change local geometry, which is why critical openings are often created after the main basin shape is established.
The manufacturing sequence described for drawn stainless sinks likewise places drain-hole punching after the main forming process.
Depending on the product, these operations can use dedicated piercing dies, cam mechanisms or later production stations.
After drawing, the sink rim may still contain excess material or dimensional variation from material flow. Trimming establishes the final outside contour before subsequent edge-forming operations.
Top-mount, undermount and other sink designs can require different flange, rim or mounting geometry. Curling, hemming or controlled edge forming can also be used where specified by the product design.
These downstream operations should be considered during the original kitchen sink deep drawing die process plan because the main draw determines the material and geometry available for the final rim.
| Capability | Changdong Reference | Conditions |
|---|---|---|
| Deep drawing capability | Demonstrated drawing depth up to approximately 300 mm | Subject to material, geometry, radii, forming route and tooling review. |
| General sheet thickness | Approximately 0.3–12 mm | This is the company-wide range, not a kitchen-sink-specific material range. Actual sink tooling requires project review. |
| Maximum die length | Approximately 4,200 mm | Depending on sink dimensions, tool structure, weight and available press conditions. |
| Press capacity | 45T–800T | Sink deep-drawing feasibility depends on required force, cushion / blank-holder conditions and available press configuration. |
| Engineering | DFM, CAE when required, draw-sequence review, springback and wrinkling analysis | Applied according to material and sink geometry. |
| Tool manufacturing / validation | CNC, WEDM, grinding, assembly, press tryout and sample validation | Final scope follows customer tooling and buyoff requirements. |
Changdong's general deep-drawing page documents demonstrated drawing depth up to approximately 300 mm under suitable conditions. Sink feasibility still depends on basin width, radius, stainless grade, sheet thickness and press configuration rather than depth alone.
A completed kitchen sink deep drawing die should be evaluated under suitable press conditions for material flow, wrinkles, splitting, thinning, galling, basin geometry and part release.
For a visible stainless sink, sample approval should also include the agreed cosmetic areas. A basin can be dimensionally acceptable while still failing the finished-product requirement because of draw marks, scratches or local surface pickup.
Inspection can include bowl depth, rim profile, corner geometry, drain position, drainboard condition, wall thickness distribution and other customer-defined dimensions.
2D and 3D finished-sink drawings
Sink type: single bowl, double bowl, drainboard, undermount, top-mount or commercial sink
Exact stainless steel grade and sheet thickness
Bowl length, width, depth and corner radii
Center saddle geometry for double-bowl sinks
Drainboard ribs and drainage-slope requirements
Drain, overflow and faucet-hole locations
Rim, flange, curling or mounting geometry
Cosmetic surface and scratch requirements
Annual production volume
Destination press model, tonnage, bed size, stroke and cushion / blank-holder information
Inspection and tooling buyoff criteria
A kitchen sink deep drawing die is custom press tooling used to form stainless steel sheet into single-bowl, double-bowl, drainboard and other deep-drawn kitchen sink geometries.
Sink tooling can include blank preparation, first drawing, redraw or calibration, trimming, drain-hole piercing, faucet or overflow-hole punching and rim forming depending on sink depth, geometry and material behavior.
Dongguan Changdong Tool & Die Co., Ltd. supports deep-drawing tooling with DFM, CAE when required, die manufacturing, CNC/WEDM machining, assembly, suitable 45T–800T press tryout, tooling correction and sample validation.
This page covers sheet-metal deep-drawing and stamping dies for stainless steel kitchen and commercial sinks. It does not cover quartz or granite composite sink compression molds, ceramic basin casting molds, complete hydraulic press manufacturing or manual welded-sink fabrication services.
A kitchen sink deep drawing die can manufacture suitable stainless steel single-bowl, double-bowl, drainboard, undermount, top-mount and selected commercial sink components according to the approved product drawing.
The need for redraw or intermediate processing depends on material grade, sheet thickness, bowl depth, width-to-depth ratio, corner radius and total forming strain. It should be determined by DFM and forming analysis rather than one fixed depth threshold.
Tool finish, working-component material, surface treatment, lubrication, radii and contact pressure are reviewed together. The correct approach depends on the actual stainless grade, sheet surface and cosmetic requirement.
The major draw moves material significantly. Piercing critical openings after the basin geometry is formed helps reference those features to the final sink shape rather than the undeformed flat blank.
Provide the 2D drawing, 3D model, exact stainless grade and thickness, bowl dimensions, depth, corner radii, drainboard and hole requirements, annual volume, destination press information and tooling buyoff criteria.
Send the single-bowl, double-bowl or drainboard sink drawing, stainless specification, sheet thickness, bowl depth, surface requirement and production information for a project-specific tooling review.
Email Sink Drawings for Tooling ReviewChangdong is good at making metal stamping dies up to 4.2 meters, also we produce small size metal stamping toolings. The company manages the complete stamping die program from the CAE Simulation, layout designs and stamping tooling designs, and finish the machining to tryout and home line tryout to your hands. Meanwhile, the company produces the prototyping parts and stamping parts range from 45-880T. The successful cases include: stamping tools of Leoni connectors, automotive stamping dies of PSA P8 & B618, metal stamping toolings of Cummins exhaust pipe assembly, automobile stamping dies of NISSAN H60B projects, and stamping tools of car audio system, Canon printers, refrigerators, ovens and washing machines and so on.If you need metal stamping dies ,stamping parts or metal prototypings,
Email to us: sales@chang-dong.com
A kitchen sink deep drawing die is custom press tooling used to form flat stainless steel blanks into three-dimensional sink bowls through drawing, stretching and related forming operations. Suitable applications can include single-bowl sinks, double-bowl sinks, undermount sinks, top-mount sinks, drainboard designs and selected commercial wash basins.
Dongguan Changdong Tool & Die Co., Ltd. develops each kitchen sink deep drawing die according to the approved sink geometry, stainless steel specification, sheet thickness, bowl depth, corner radii, rim design, drainage features, production volume and destination press conditions.
Sink tooling should not be reduced to one deep-drawing operation. Depending on bowl depth and geometry, the complete process can require blank preparation, first draw, redraw or calibration, trimming, drain-hole piercing, faucet or overflow-hole operations, rim forming and final dimensional correction.
One-piece basin tooling requires stable material flow around the complete perimeter while controlling wall thinning and corner strain.
Two-bowl geometry creates competing material-flow zones around the center saddle and requires balanced forming between adjacent bowls.
Stainless drawing requires suitable tool finish, lubrication, contact geometry and working-component selection to reduce adhesive wear and surface marking.
Suitable sink tooling can be reviewed against Changdong press capacity according to die dimensions, drawing force and press conditions.
A kitchen sink deep drawing die is dedicated sheet-metal tooling used to draw a flat stainless blank into a sink basin while controlling material flow around the bowl walls, corners, rim and bottom. The process may use one major draw or multiple drawing and correction stages depending on bowl depth, corner radius and material behavior. The complete tooling package can also include trimming, drain-hole piercing, rim forming and other secondary press operations required to reach the approved sink geometry.
A stainless sink does not behave like a simple cylindrical cup. During forming, some areas of the blank flow inward through drawing while other regions stretch across the basin walls and corners.
This means the tool must balance two competing risks: too little restraint can allow flange or wall wrinkling, while too much restraint can increase thinning or cause the sheet to split around high-strain areas.
The broader relationship between draw depth, material ductility and geometry is explained in Deep Drawing Height and Material Ductility.
One of the first process decisions is whether the approved basin can be produced through one main drawing operation or whether the depth and geometry require additional redraw or calibration stages.
A deeper bowl does not automatically mean that another draw is required. Corner radius, blank size, material grade, sheet thickness, bowl aspect ratio and the amount of stretching all affect the forming route.
When the accumulated strain becomes too high, an additional drawing stage can reduce the deformation required in one operation. Some stainless sink processes may also require intermediate annealing because austenitic stainless sheet work-hardens during forming.
The correct process should therefore come from DFM and forming analysis rather than a fixed depth rule. Sink manufacturing literature confirms that additional forming and intermediate annealing may be required depending on basin dimensions and material behavior.
The same sheet thickness can form very different depths depending on basin width, corner radius, material properties and whether the process relies mainly on drawing or on stretching.
For a kitchen sink deep drawing die, drawing depth should therefore be reviewed together with the complete geometry and forming path. Quoting one universal “maximum sink depth” without the part drawing has limited engineering value.
Double-bowl sink geometry creates a more complex forming condition than two independent single bowls. The center saddle connects both basins, so material drawn toward one bowl also affects the neighboring bowl.
If material flow is not balanced, strain can concentrate around the center bridge or the intersection between the saddle and bowl walls. The result can be local thinning, cracking or asymmetric basin geometry.
Tooling can use local blank-holder control, drawbeads, radii and staged forming to balance the two sides. These features should be developed from the actual double-bowl design rather than copied from a single-bowl tool.
Blank-holder force controls how quickly material can feed from the flange area into the sink cavity. Insufficient restraint can create wrinkling, while excessive force can restrict material flow and increase wall thinning or fracture.
The required pressure is not constant across every sink geometry. Large corner radii, narrow side regions, drainboards and double-bowl transitions can need different local flow behavior.
For the dedicated engineering topic, see Blank Holder Force in Deep Drawing.
A stainless sink is both a formed structural product and a visible consumer surface. Adhesive wear between the stainless blank and die surface can produce scratches, pickup or galling that remain visible after forming.
For an kitchen sink deep drawing die, tool finish, contact pressure, lubrication, radii, working-component material and surface treatment should therefore be reviewed together.
Surface protection should not be treated only as a polishing operation after forming. The forming process itself should minimize the mechanism that creates the defect.
For broader stainless forming considerations, see Stainless Steel Metal Stamping.
Wrinkling often appears where compressive material accumulates around the outer flange or near the upper wall of a deep basin. The defect can be influenced by holder pressure, draw radius, blank shape and material flow.
A 2025 study on single deep drawing of SUS304 sink geometry specifically investigated wrinkling, cracking and springback, and found die fillet radius to be an important forming variable.
For general defect diagnosis, see Draw-Wall Wrinkling: Causes and Solutions.
A drainboard sink combines a deep basin with a relatively broad surrounding surface. The drainboard can contain shallow ribs, drainage features or local slopes while still needing acceptable overall flatness.
The basin drawing operation can introduce residual stress into the surrounding sheet. If final calibration is insufficient, the drainboard may show oil-canning or unwanted local deformation after unloading.
Forming sequence and restriking should therefore consider both the deep basin and the shallow drainboard geometry as one connected stamped component.
A sink bottom should not be evaluated only for flatness. The approved product may intentionally include a slight slope or formed drainage path toward the waste outlet.
After deep drawing, residual stress can cause the bottom to dish upward, become locally unstable or deviate from the intended drainage geometry.
A final calibration or restriking operation can be evaluated where required to control the approved basin-bottom profile before the drain opening is completed.
Drain holes, overflow openings and faucet-deck holes should be located relative to the final formed sink rather than only the flat blank.
Major drawing operations can shift material and change local geometry, which is why critical openings are often created after the main basin shape is established.
The manufacturing sequence described for drawn stainless sinks likewise places drain-hole punching after the main forming process.
Depending on the product, these operations can use dedicated piercing dies, cam mechanisms or later production stations.
After drawing, the sink rim may still contain excess material or dimensional variation from material flow. Trimming establishes the final outside contour before subsequent edge-forming operations.
Top-mount, undermount and other sink designs can require different flange, rim or mounting geometry. Curling, hemming or controlled edge forming can also be used where specified by the product design.
These downstream operations should be considered during the original kitchen sink deep drawing die process plan because the main draw determines the material and geometry available for the final rim.
| Capability | Changdong Reference | Conditions |
|---|---|---|
| Deep drawing capability | Demonstrated drawing depth up to approximately 300 mm | Subject to material, geometry, radii, forming route and tooling review. |
| General sheet thickness | Approximately 0.3–12 mm | This is the company-wide range, not a kitchen-sink-specific material range. Actual sink tooling requires project review. |
| Maximum die length | Approximately 4,200 mm | Depending on sink dimensions, tool structure, weight and available press conditions. |
| Press capacity | 45T–800T | Sink deep-drawing feasibility depends on required force, cushion / blank-holder conditions and available press configuration. |
| Engineering | DFM, CAE when required, draw-sequence review, springback and wrinkling analysis | Applied according to material and sink geometry. |
| Tool manufacturing / validation | CNC, WEDM, grinding, assembly, press tryout and sample validation | Final scope follows customer tooling and buyoff requirements. |
Changdong's general deep-drawing page documents demonstrated drawing depth up to approximately 300 mm under suitable conditions. Sink feasibility still depends on basin width, radius, stainless grade, sheet thickness and press configuration rather than depth alone.
A completed kitchen sink deep drawing die should be evaluated under suitable press conditions for material flow, wrinkles, splitting, thinning, galling, basin geometry and part release.
For a visible stainless sink, sample approval should also include the agreed cosmetic areas. A basin can be dimensionally acceptable while still failing the finished-product requirement because of draw marks, scratches or local surface pickup.
Inspection can include bowl depth, rim profile, corner geometry, drain position, drainboard condition, wall thickness distribution and other customer-defined dimensions.
2D and 3D finished-sink drawings
Sink type: single bowl, double bowl, drainboard, undermount, top-mount or commercial sink
Exact stainless steel grade and sheet thickness
Bowl length, width, depth and corner radii
Center saddle geometry for double-bowl sinks
Drainboard ribs and drainage-slope requirements
Drain, overflow and faucet-hole locations
Rim, flange, curling or mounting geometry
Cosmetic surface and scratch requirements
Annual production volume
Destination press model, tonnage, bed size, stroke and cushion / blank-holder information
Inspection and tooling buyoff criteria
A kitchen sink deep drawing die is custom press tooling used to form stainless steel sheet into single-bowl, double-bowl, drainboard and other deep-drawn kitchen sink geometries.
Sink tooling can include blank preparation, first drawing, redraw or calibration, trimming, drain-hole piercing, faucet or overflow-hole punching and rim forming depending on sink depth, geometry and material behavior.
Dongguan Changdong Tool & Die Co., Ltd. supports deep-drawing tooling with DFM, CAE when required, die manufacturing, CNC/WEDM machining, assembly, suitable 45T–800T press tryout, tooling correction and sample validation.
This page covers sheet-metal deep-drawing and stamping dies for stainless steel kitchen and commercial sinks. It does not cover quartz or granite composite sink compression molds, ceramic basin casting molds, complete hydraulic press manufacturing or manual welded-sink fabrication services.
A kitchen sink deep drawing die can manufacture suitable stainless steel single-bowl, double-bowl, drainboard, undermount, top-mount and selected commercial sink components according to the approved product drawing.
The need for redraw or intermediate processing depends on material grade, sheet thickness, bowl depth, width-to-depth ratio, corner radius and total forming strain. It should be determined by DFM and forming analysis rather than one fixed depth threshold.
Tool finish, working-component material, surface treatment, lubrication, radii and contact pressure are reviewed together. The correct approach depends on the actual stainless grade, sheet surface and cosmetic requirement.
The major draw moves material significantly. Piercing critical openings after the basin geometry is formed helps reference those features to the final sink shape rather than the undeformed flat blank.
Provide the 2D drawing, 3D model, exact stainless grade and thickness, bowl dimensions, depth, corner radii, drainboard and hole requirements, annual volume, destination press information and tooling buyoff criteria.
Send the single-bowl, double-bowl or drainboard sink drawing, stainless specification, sheet thickness, bowl depth, surface requirement and production information for a project-specific tooling review.
Email Sink Drawings for Tooling ReviewDongguan Changdong Stamping Dies CO., LTD. © copyright Add：NO. 56-B, Fuming South Road, Dalang, Dongguan, P.R.C
E-mail: sales@chang-dong.com Tel: 0086-769-8106 1256 Mobile: 0086-189 2949 4380 Sales Manager: Ms. Alice Fax: 0086-769-8106 1926
Dongguan Changdong Tool & Die Co., Ltd. is a custom metal stamping die and stamped parts manufacturer founded in 2012. We support automotive, home appliance, electrical and industrial projects from DFM review and die design to press tryout, sample validation and metal stamping production.
Main capabilities: Stamping Dies | Progressive Die | Transfer Die | Prototype Die | Prototype Tooling | Stamping Parts | Custom Metal Stamping Parts
For new tooling or stamping projects, please send your 2D drawing, 3D model, material grade, sheet thickness, tolerance requirements, annual volume and sample target date through Contact Us.
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