Dumpling Maker 2.0 EDSGN 100-008, Group 2

Submitted by: Xinru Yang, Juliana Redisi, Bernard Lindinger, Aditya Ravi Submitted to: Xinli Wu 10/21/2018

ii 2. Abstract The motive for this project was to construct a prototype of a portable, semi-automatic dumpling maker. The goal is to design a dumpling maker that is cheap, efficient, and easy to use. The total cost of the dumpling maker must be less than 200 dollars. This report outlines the design process of the semi-automatic dumpling maker.

iii 3. Table of Contents i Cover Page------Xinru Yang ii Abstract------Xinru Yang iii Table of Contents------Xinru Yang 1 Introduction------Aditya Ravi 2 Description of Design Task: • Problem Statement------Juliana Redisi • Mission statement------Juliana Redisi • Design Specifications------Aditya Ravi 3-10 Design Approach: • Project management - Gantt chart------Xinru Yang • Customer needs assessment------Juliana Redisi, Xinru Yang, Bernard Lindinger, Aditya Ravi • Concept generation------Juliana Redisi, Xinru Yang, Bernard Lindinger, Aditya Ravi • Design Selection matrices------Xinru Yang, Juliana Redisi 11-16 The final design and its prototype: • Working drawings of the final design------Aditya Ravi • Prototype scale and digital images of the prototype---- Juliana Redisi, Xinru Yang • Design features------Xinru Yang, Aditya Ravi • Operation instructions ------Bernard Lindinger 16-18 Engineering Analysis: • Working mechanism------Bernard Lindinger, Aditya Ravi • Cost analysis------Bernard Lindinger • Summary and conclusions------Juliana Redisi, Bernard Lindinger 18 Acknowledgement------Bernard Lindinger 18 References------Bernard Lindinger Chief Editor: Juliana Redisi

1 4. Introduction: Dumplings are a simple dish of dough filled with meat. Over time, we have seen variations of this dish from many cultures spread around the globe. However, the famous Manti steamed dumplings of Central Asia are found in every Chinese restaurant and are popular among families worldwide. The desire for this savory treat is halted by the intensive process of making them. The future of dumplings lies in an automated machine that will help families create this delicious meal in their home with ease.

2 Description of Design Task • Problem statement Dumplings are a desired dish for many households and small restaurants, but the process to make them is long and labor intensive. There are not dumpling makers on the market suitable, or affordable for small-scale use. • Mission statement Our mission is to design a dumpling maker to reduce the manual labor and time associated with the process of making dumplings by families. The dumpling maker needs to be affordable, under $200 to produce, and suitable for a typical household. • Design Specifications a. The dumpling maker should be automatic or semi-automatic. b. The dumpling maker should produce no less than 10 dumplings per minute on average. c. The material cost for the dumpling maker should not exceed $200 unless it can be justified. d. The dumpling maker should be safe as a food processor, easy to maintain, safe to use, and dishwasher safe.

3 Design Approach • Table 1. Gantt Chart

• Customer needs assessment After speaking with Chinese restaurants about their desires and issues with dumpling makers, the responses were very similar. None of the restaurants seemed interested in buying a dumpling maker, but each establishment noted that if they were to buy one hypothetically, it would need to be safe and cheap. The most helpful information from the calls came from Xinru’s Aunt. Her Aunt Caiyun used to own and operate a Chinese Restaurant in China. She did not have a desire for a machine. Caiyun mentioned that the market for hand-made dumplings sells for more money. They have the process down and the extra work is worth more of a profit. She said she would not pay more than $150 for a machine. However, this only references the needs of a restaurant. A family might choose to save time and energy with a machine.

4 • Concept Generalization Fig 1. Design A

5 Fig 2. Rough Design B

Fig 3. Rough Design C

6 Fig. 4 Design D

7 Fig. 5 Rough Design E

8 Fig.6 Rough Design F

Fig.7 Updated Design B

9 Fig.8 Updated Design F

10 • Design Selection Matrices Table 2. Design Matrix Design A Design B Design C Design D Design E Design F Size - 0 - + 0 + Ease of Use + 0 + 0 - 0 Time + 0 0 0 0 0 Efficiency/S peed Difficult to - + - - - + Clean Waste 0 0 0 - - 0 Storage/Mat 0 0 + 0 - + erial Hold Durability + - 0 0 - 0 Manufacturi - 0 0 0 - + ng

Sum of +'s 3 1 2 1 0 4 Sum of 0's 2 6 4 5 2 4 Sum of -'s 3 1 2 2 6 0

Net Score 0 0 0 -1 -6 4 Rank 4 2 3 5 6 1 Proceed? no yes no no no Yes Table 3. Selection Matrix Selection Weight B F Criteria Rating Weighted Rating Weighted Score Score Size 10% 3 0.3 4 0.4 Ease of Use 20% 4 0.8 4 0.8 Time 20% 3 0.6 2 0.4 Efficiency/Spe ed Ease of Clean 10% 4 0.4 2 0.2

Waste 5% 3 0.15 2 0.1 Storage/Materi 5% 3 0.15 4 0.2 al Hold Durability 20% 5 1 4 0.8 Manufacturing 10% 4 0.4 2 0.2

Total Score 3.8 3.1 Continue? Yes No

11 The final design and its prototype • Complete set of working drawings Fig 9. Image of Full Working Drawing

12 Fig 10. Image of Clamp

13 Fig 11. Image of filler

14 Fig 12. Image of Smasher

15 • Prototype Scale and Digital Image a. Scale: 1:1 Fig 13. Prototype

• Design Features The entire machine runs on a programmed system such that every task is performed at specific intervals. Minute details such as the speed of the conveyor belt have been taken into consideration so that all parts and processes work together in order to produce a dumpling. As soon as the machine is switched on, the slicer is programmed to come down at a time period after the machine has been started. Hence, all the user has to do is to place the dough and start the machine. The smasher also works in the same manner as it is also programmed to drop down at a certain time after the machine is switched on. The speed of the conveyor belt has to be altered in order to flatten every sliced piece. In the filling stage, the filler will automatically drop same amount of filling for every dumpling. By placing the filler above the clamper, after it drops the filling, the

16 clamper will be triggered and seal the dumpling. The clamper then rotates on a rod placed beneath it and releases the dumpling on the other conveyor belt. • Operation Instructions a. Fill dispenser fully with filling b. Place dough onto conveyer belt c. Place basket/dumpling holder next to end of slanted conveyer d. Push dough along conveyer belt e. The rest of steps will automatically be done by the machine. Pick up the dumplings when the machine stops. Engineering Analysis • Working mechanism and engineering analysis a. In order to make the consumers work as simple as possible, the dumpling maker is designed in such a way which involves minimal effort from them. The consumer prepares the dough manually and inserts it into the dumpling maker. After this, the ‘slicer’ comes down due to a hydraulic system and slices the dough into ten pieces. This happens as the all components inside the machine are programmed to carry out their respective tasks in given intervals of time. After the slicing stage, the conveyor belt slows down so that each piece is flattened individually by the ‘smasher’, which also functions with a hydraulic system. Before the third stage, the flattened dough moves on to the clamper and is molded in the shape of the dumpling. The filling is then dropped down from the ‘filler’ which has a removable dispenser carrying the filling. After the filling is dispensed, the clamp closes which creates pressure and forms a tight seal along the perimeter of the dough, holding the filling inside. The clamp rests on a rotatable rod, and hence is turned and releases the dumpling onto the second conveyor belt. Utilizing the incline, the dumpling simply slides down and can be collected by the consumer.

17 • Cost Analysis Table 4. Cost Analysis Part (Material) Quantity Cost (Dollars Per Unit) Total

Sides (Plastic Sheets) 3 10.00 30.00 Conveyer Stand 1 3.50 3.50 (Aluminum Round Tube) Conveyer (m2 of belt) 2 10.00 20.00

Roller (3/4" Dia. 6 7.38 44.28 Aluminum Roller)

Custom Parts

Clamp (Stainless Steel 1/2 10.19 5.10 Half Round)

Slicer (Stainless Steel) 9 3.01 27.09 Dispenser (Hollow 1 8.09 8.09 Plastic Cylinders)

Flattener (Aluminum 1 19.52 19.52 Cylinders)

Welding/Cutting (hrs.) 0.75 45.00 33.75

Total Cost 191.33

• Conclusion/Summary a. Over the allotted time frame and with the specified budget, the team gathered information and ideas related to the functionality, design, and usefulness of a small dumpling maker. The finished prototype met all specifications related to cost, efficiency, and feasibility of the maker. However, after examination by peers and a professional engineer, there were key areas of improvement that were brought up. Specifically, regarding the build, the machine does not need the elevation. Both conveyers could be level with each other and the incline could be removed. This would drastically decrease the height and materials. With this simple change, the machine could be a lot more compact for family use and a lot cheaper to produce. This would also leave room in the budget to use better materials. This detail is significant because one debate our group faced is which

18 materials should be used in production of the maker. Some members wanted to use aluminum due to its durability, but due to cost restrictions, plastic was the better option. In addition, the slicer could have been scaled down to one blade as the multi- blade costs more and does not improve upon the slicing process. Furthermore, with a budget of $200, an automated machine was unfeasible as a motor, gearbox, and timed system would all cost upwards of $50, which would put the project at 25% over budget. In the end, a semi-automated machine with ease of access was envisioned and a successful prototype was built off these specifications of efficiency, cost, and size.

References McMaster-Carr (2018), Raw Materials. McMaster-Carr Supply Company: [accessed 2018 October 20]. https://www.mcmaster.com/

Acknowledgements The team would like to thank Professor Xinli for teaching the necessary fundamentals of constructing Multiview drawings and the basics of an engineering project. The group would also like to acknowledge Jack the TA for helping design the cardboard prototype in the machine shop and teaching the team how to safely use each machine for different specified tasks. Without this help, it would not have been possible for the team to complete a prototype within the given timeframe.